30 files changed, 3073 insertions, 0 deletions
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/CMakeLists.txt b/veslibrary/ves_cpplibrary/src/lib/transport/CMakeLists.txt
new file mode 100755
index 0000000..59e42f4
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/CMakeLists.txt
@@ -0,0 +1,30 @@
+aux_source_directory(../common LOG_SRCS)
+aux_source_directory(. TRANSPORT_SRCS)
+aux_source_directory(gen-cpp RPC_SRCS)
+
+find_package(nlohmann_json)
+find_package(spdlog)
+find_package(leveldb)
+find_package(thrift)
+find_package(CURL)
+
+include_directories("${THRIFT_INCLUDE_DIR}")
+include_directories("${LEVELDB_INCLUDE_DIR}")
+include_directories(include)
+
+SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fpermissive")
+
+add_library(xtransport SHARED ${LOG_SRCS} ${RPC_SRCS} ${TRANSPORT_SRCS})
+target_link_libraries(xtransport ${CURL_LIBRARY} ${THRIFT_LIBRARY} ${LEVELDB_LIBRARY})
+
+file(GLOB HDRS "include/*.h")
+
+install(FILES ${HDRS}
+	    DESTINATION "include/xvesagent/xtransport"
+)
+install(FILES ../../cmake/xtransportConfig.cmake
+	    DESTINATION "lib/cmake/xtransport"
+)
+INSTALL(TARGETS xtransport
+	LIBRARY DESTINATION lib
+)
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XBufferedTransport.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/XBufferedTransport.cpp
new file mode 100755
index 0000000..6abce48
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XBufferedTransport.cpp
@@ -0,0 +1,170 @@
+#include "XBufferedTransport.h"
+#ifndef SPDLOG_ACTIVE_LEVEL 
+#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_TRACE
+#endif
+#include "spdlog/spdlog.h"
+
+using namespace std;
+using namespace vagt::transport;
+using namespace spdlog;
+
+vagt::transport::XBufferedTransport::XBufferedTransport(std::shared_ptr<XTransport> transport, std::shared_ptr<queue::XQueue> queue):
+    transport_(transport), queue_(queue)
+{
+}
+
+vagt::transport::XBufferedTransport::~XBufferedTransport()
+{
+}
+
+XErrorCode vagt::transport::XBufferedTransport::start()
+{
+    if (!transport_)
+    {
+        SPDLOG_ERROR("Empty transport.");
+        return XErrorNok;
+    }
+
+    if (!queue_)
+    {
+        SPDLOG_ERROR("Empty queue.");
+        return XErrorNok;
+    }
+
+    auto rc = transport_->start();
+
+    future_ = async(launch::async, [this]() {return this->worker(); });
+
+    allowPost();
+
+    return rc;
+}
+
+XErrorCode vagt::transport::XBufferedTransport::stop()
+{
+    cancelPost();
+    if (!transport_)
+    {
+        SPDLOG_ERROR("Empty transport.");
+        return XErrorNok;
+    }
+
+    if (!queue_)
+    {
+        SPDLOG_ERROR("Empty queue.");
+        return XErrorNok;
+    }
+
+    future_.get();
+
+    return transport_->stop();
+}
+
+XErrorCode vagt::transport::XBufferedTransport::post(const std::string& event)
+{
+    if (shouldCancelPost())
+    {
+        return XErrorCanceled;
+    }
+
+    if (event.empty())
+    {
+        SPDLOG_WARN("Trying post empty event.");
+        return XErrorClientError;
+    }
+
+    if (!queue_)
+    {
+        return XErrorNok;
+    }
+
+    auto rc = vagt::queue::XErrorOk;
+    {
+        unique_lock<mutex> _(lock_);
+        rc = queue_->push(event);
+        cond_.notify_one();
+    }
+   
+    if (rc == vagt::queue::XErrorOk)
+    {
+        return XErrorOk;
+    }
+    else
+    {
+        return XErrorNok;
+    }
+}
+
+void vagt::transport::XBufferedTransport::cancelPost()
+{
+    XTransport::cancelPost();
+
+    {
+        unique_lock<mutex> _(lock_);
+        cancel_.store(true, std::memory_order_release);
+        cond_.notify_one();
+    }
+
+    if (transport_)
+    {
+        transport_->cancelPost();
+    }
+}
+
+void vagt::transport::XBufferedTransport::allowPost()
+{
+    if (transport_)
+    {
+        transport_->allowPost();
+    }
+    XTransport::allowPost();
+}
+
+bool vagt::transport::XBufferedTransport::shouldCancelPost()
+{
+    return XTransport::shouldCancelPost();
+}
+
+void vagt::transport::XBufferedTransport::worker()
+{
+    SPDLOG_INFO("Start transport send thread.");
+    while (true)
+    {
+        string event;
+        {
+            unique_lock<mutex> _(lock_);
+            cond_.wait(_, [this]() {return shouldCancelPost() || !queue_->empty(); });
+
+            if (shouldCancelPost())
+            {
+                SPDLOG_INFO("Quit transport send thread.");
+                return;
+            }
+
+            if (!queue_->empty())
+            {
+                event = queue_->front();
+            }
+            else
+            {
+                continue;
+            }
+        }
+
+        if (transport_)
+        {
+            auto rc = transport_->post(event);
+            if (vagt::transport::XErrorOk == rc)
+            {
+                unique_lock<mutex> _(lock_);
+                queue_->pop();
+            }
+            else if (vagt::transport::XErrorClientError == rc)
+            {
+                unique_lock<mutex> _(lock_);
+                queue_->pop();
+                SPDLOG_WARN("Drop event:({}) ({}).", event, rc);
+            }
+        }
+    }
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XBufferedTransport.h b/veslibrary/ves_cpplibrary/src/lib/transport/XBufferedTransport.h
new file mode 100755
index 0000000..af51f64
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XBufferedTransport.h
@@ -0,0 +1,39 @@
+#pragma once
+
+#include "XTransport.h"
+#include "XQueue.h"
+#include <future>
+#include <mutex>
+#include <condition_variable>
+
+namespace vagt
+{
+    namespace transport
+    {
+        class XBufferedTransport : public XTransport
+        {
+        public:
+            XBufferedTransport(std::shared_ptr<XTransport> transport, std::shared_ptr<vagt::queue::XQueue> queue);
+            virtual ~XBufferedTransport();
+
+            virtual XErrorCode start() override;
+            virtual XErrorCode stop() override;
+            virtual XErrorCode post(const std::string& event) override;
+
+            virtual void cancelPost() override;
+            virtual void allowPost() override;
+            virtual bool shouldCancelPost() override;
+
+        private:
+            void worker();
+
+            std::shared_ptr<XTransport> transport_;
+            std::shared_ptr<queue::XQueue> queue_;
+            std::future<void> future_;
+
+            std::condition_variable cond_;
+            std::mutex lock_;
+        };
+    }
+}
+ 
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XDiskQueue.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/XDiskQueue.cpp
new file mode 100755
index 0000000..c63d19e
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XDiskQueue.cpp
@@ -0,0 +1,192 @@
+#include "XDiskQueue.h"
+#ifndef SPDLOG_ACTIVE_LEVEL 
+#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_TRACE
+#endif
+#include "spdlog/spdlog.h"
+#include "leveldb/env.h"
+
+using namespace std;
+using namespace vagt::queue;
+using namespace leveldb;
+
+constexpr auto XDiskQueueCompactInterval = 1800;
+
+class XDummyLogger : public leveldb::Logger
+{
+    void Logv(const char* format, va_list ap) {}
+};
+
+vagt::queue::XDiskQueue::XDiskQueue(const std::string & path):db_(nullptr),it_(nullptr),keyId_(0)
+{
+    compactTime_ = chrono::system_clock::now();
+
+    Options opt;
+    opt.create_if_missing = true;
+    opt.write_buffer_size = 4 * 1024 * 1024;
+    opt.max_open_files = 10;
+    opt.info_log = new XDummyLogger;
+
+    opt_.fill_cache = true;
+
+    Status status = DB::Open(opt, path, &db_);
+    if (status.ok() && db_ != nullptr)
+    {
+        SPDLOG_INFO("Disk queue is ready.");
+        return;
+    }
+
+    SPDLOG_INFO("Repairing disk queue.");
+    status = RepairDB(path, opt);
+    if (status.ok())
+    {
+        status = DB::Open(opt, path.c_str(), &db_);
+        if (status.ok() && db_ != nullptr)
+        {
+            SPDLOG_INFO("Disk queue is ready.");
+            return;
+        }
+    }
+
+    SPDLOG_ERROR("Fail to initialize disk queue:{}.", status.ToString());
+}
+
+vagt::queue::XDiskQueue::~XDiskQueue()
+{
+    if (it_)
+    {
+        delete it_;
+        it_ = nullptr;
+    }
+
+    if (db_)
+    {
+        delete db_;
+        db_ = nullptr;
+    }
+}
+
+bool vagt::queue::XDiskQueue::empty()
+{
+    if (!it_)
+    {
+        it_ = db_->NewIterator(opt_);
+        it_->SeekToFirst();
+        if (it_->Valid())
+        {
+            return false;
+        }
+        else
+        {
+            return true;
+        }
+    }
+
+    if (it_->Valid())
+    {
+        return false;
+    }
+
+    delete it_;
+    it_ = db_->NewIterator(opt_);
+    it_->SeekToFirst();
+    if (it_->Valid())
+    {
+        return false;
+    }
+    else
+    {
+        return true;
+    }
+}
+
+XErrorCode vagt::queue::XDiskQueue::push(const std::string & val)
+{
+    auto key = createKey();
+    SPDLOG_DEBUG("Push {} to disk queue:{}.", val, key);
+
+    WriteOptions opt;
+    opt.sync = false;
+    auto status = db_->Put(opt, key, val);
+    if (!status.ok())
+    {
+        SPDLOG_ERROR("Fail to push {} to disk queue:{}.", key, status.ToString());
+        return XErrorNok;
+    }
+
+    return XErrorOk;
+}
+
+void vagt::queue::XDiskQueue::pop()
+{
+    if (!it_ || !it_->Valid())
+    {
+        SPDLOG_ERROR("Iterator is not valid.");
+        return;
+    }
+
+    auto delKey = it_->key().ToString();
+    it_->Next();
+
+    WriteOptions wo;
+    wo.sync = false;
+
+    auto status = db_->Delete(wo, delKey);
+    if (status.ok())
+    {
+        SPDLOG_DEBUG("Pop {} from disk queue.", delKey);
+
+        tryCompact(delKey);
+
+        return;
+    }
+    else
+    {
+        SPDLOG_ERROR("Fail to pop {} from disk queue:{}.", delKey, status.ToString());
+        return;
+    }
+}
+
+std::string vagt::queue::XDiskQueue::front()
+{
+    if (it_ && it_->Valid())
+    {
+        return it_->value().ToString();
+    }
+
+    SPDLOG_ERROR("Iterator is not valid.");
+    return "";
+}
+
+std::string vagt::queue::XDiskQueue::createKey()
+{
+    auto now = chrono::system_clock::now().time_since_epoch().count();
+    snprintf(key, sizeof(key), "%020ld_%010u", now, keyId_.fetch_add(1));
+    return key;
+}
+
+void vagt::queue::XDiskQueue::tryCompact(const std::string & key)
+{
+    if (it_->Valid())
+    {
+        return;
+    }
+
+    delete it_;
+    it_ = nullptr;
+
+    auto now = chrono::system_clock::now();
+    auto duration = chrono::duration_cast<std::chrono::seconds>(now - compactTime_).count();
+
+    if (duration > XDiskQueueCompactInterval &&
+        db_ &&
+        !key.empty())
+    {
+        SPDLOG_INFO("Disk queue compaction starting...");
+        Slice end(key);
+        SPDLOG_INFO("Compact key older than {}.", end.ToString());
+        db_->CompactRange(NULL, &end);
+        SPDLOG_INFO("Disk queue compaction complete...");
+
+        compactTime_ = now;
+    }
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XDiskQueue.h b/veslibrary/ves_cpplibrary/src/lib/transport/XDiskQueue.h
new file mode 100755
index 0000000..2168a58
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XDiskQueue.h
@@ -0,0 +1,34 @@
+#pragma once
+
+#include "XQueue.h"
+#include "leveldb/db.h"
+#include <atomic>
+#include <chrono>
+
+namespace vagt
+{
+    namespace queue
+    {
+        class XDiskQueue : public XQueue
+        {
+        public:
+            XDiskQueue(const std::string& path);
+            ~XDiskQueue();
+            virtual bool empty() override;
+            virtual XErrorCode push(const std::string & val) override;
+            virtual void pop() override;
+            virtual std::string front() override;
+        private:
+            std::string createKey();
+            void tryCompact(const std::string& key);
+
+            std::atomic<long> keyId_;
+            char key[32];
+            std::chrono::system_clock::time_point compactTime_;
+
+            leveldb::DB* db_;
+            leveldb::ReadOptions opt_;
+            leveldb::Iterator* it_;
+        };
+    }
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XLibcurlTransport.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/XLibcurlTransport.cpp
new file mode 100755
index 0000000..362e8d2
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XLibcurlTransport.cpp
@@ -0,0 +1,376 @@
+#include "XLibcurlTransport.h"
+#ifndef SPDLOG_ACTIVE_LEVEL 
+#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_TRACE
+#endif
+#include "spdlog/spdlog.h"
+#include <functional>
+
+using namespace std;
+using namespace vagt;
+using namespace vagt::transport;
+using namespace spdlog;
+
+class XAutoCleanUp
+{
+public:
+    explicit XAutoCleanUp(function<void(void)> cleanup) :_cleanup(cleanup)
+    {
+
+    }
+    ~XAutoCleanUp()
+    {
+        if (_cleanup) _cleanup();
+    }
+private:
+    XAutoCleanUp(const XAutoCleanUp&) = delete;
+    XAutoCleanUp& operator=(const XAutoCleanUp&) = delete;
+    function<void(void)> _cleanup;
+};
+
+char XLibcurlTransport::curlErrorBuf_[CURL_ERROR_SIZE] = { 0 };
+
+struct XMemoryStuct
+{
+    char * memory;
+    size_t size;
+};
+
+XLibcurlTransport::XLibcurlTransport(const XTransportOption& option):
+    option_(option),
+    curl_(nullptr),
+    hdr_(nullptr)
+{
+}
+
+XErrorCode XLibcurlTransport::start()
+{
+    auto rc = initLibcurl();
+
+    allowPost();
+
+    return rc;
+}
+
+XErrorCode XLibcurlTransport::stop()
+{
+    cancelPost();
+    return cleanupLibcurl();
+}
+
+XErrorCode XLibcurlTransport::post(const std::string& event)
+{
+    if (shouldCancelPost())
+    {
+        return XErrorCanceled;
+    }
+
+    if (event.empty())
+    {
+        SPDLOG_WARN("Trying post empty event.");
+        return XErrorClientError;
+    }
+    return curlPost(event);
+}
+
+XErrorCode XLibcurlTransport::initLibcurl()
+{
+    auto rc = curl_global_init(CURL_GLOBAL_SSL);
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to init libcurl:({}).", rc);
+        return XErrorNok;
+    }
+
+    curl_ = curl_easy_init();
+    if (!curl_)
+    {
+        SPDLOG_ERROR("Fail to get libcurl handle.");
+        return XErrorNok;
+    }
+
+    rc = curl_easy_setopt(curl_, CURLOPT_ERRORBUFFER, curlErrorBuf_);
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to set libcurl error message buffer:({}).", rc);
+        return XErrorNok;
+    }
+
+    rc = curl_easy_setopt(curl_, CURLOPT_URL, option_.url_.c_str());
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to set libcurl url {}:({}) {}.", option_.url_, rc, curlErrorBuf_);
+        return XErrorNok;
+    }
+
+    if (!option_.sourceIp_.empty())
+    {
+        rc = curl_easy_setopt(curl_, CURLOPT_INTERFACE, option_.sourceIp_.c_str());
+        if (rc != CURLE_OK)
+        {
+            SPDLOG_ERROR("Fail to bind interface {} to libcurl:({}) {}.", option_.sourceIp_, rc, curlErrorBuf_);
+            return XErrorNok;
+        }
+    }
+
+    if (option_.secure_)
+    {
+        if (!option_.certFilePath_.empty())
+        {
+            rc = curl_easy_setopt(curl_, CURLOPT_SSLCERT, option_.certFilePath_.c_str());
+            if (rc != CURLE_OK)
+            {
+                SPDLOG_ERROR("Fail to init libcurl with client cert:({}) {}.", rc, curlErrorBuf_);
+                return XErrorNok;
+            }
+        }
+
+        if (!option_.keyFilePath_.empty())
+        {
+            rc = curl_easy_setopt(curl_, CURLOPT_SSLKEY, option_.keyFilePath_.c_str());
+            if (rc != CURLE_OK)
+            {
+                SPDLOG_ERROR("Fail to init libcurl with client key:({}) {}.", rc, curlErrorBuf_);
+                return XErrorNok;
+            }
+        }
+
+        if (!option_.caInfo_.empty())
+        {
+            rc = curl_easy_setopt(curl_, CURLOPT_CAINFO, option_.caInfo_.c_str());
+            if (rc != CURLE_OK)
+            {
+                SPDLOG_ERROR("Fail to init libcurl with CA cert:({}) {}.", rc, curlErrorBuf_);
+                return XErrorNok;
+            }
+        }
+
+        if (!option_.caFilePath_.empty())
+        {
+            rc = curl_easy_setopt(curl_, CURLOPT_CAPATH, option_.caFilePath_.c_str());
+            if (rc != CURLE_OK)
+            {
+                SPDLOG_ERROR("Fail to init libcurl with CA cert path:({}) {}.", rc, curlErrorBuf_);
+                return XErrorNok;
+            }
+        }
+
+        rc = curl_easy_setopt(curl_, CURLOPT_SSL_VERIFYPEER, option_.verifyPeer_);
+        if (rc != CURLE_OK)
+        {
+            SPDLOG_ERROR("Fail to init libcurl with SSL server verification:({}){}.", rc, curlErrorBuf_);
+            return XErrorNok;
+        }
+
+        rc = curl_easy_setopt(curl_, CURLOPT_SSL_VERIFYHOST, option_.verifyHost_);
+        if (rc != CURLE_OK)
+        {
+            SPDLOG_ERROR("Fail to init libcurl with client host verification:({}) {}.", rc, curlErrorBuf_);
+            return XErrorNok;
+        }
+
+        rc = curl_easy_setopt(curl_, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);
+        if (rc != CURLE_OK)
+        {
+            SPDLOG_ERROR("Fail to init libcurl with SSL version:({}) {}.", rc, curlErrorBuf_);
+            return XErrorNok;
+        }
+    }
+
+    rc = curl_easy_setopt(curl_, CURLOPT_USERAGENT, "libcurl-agent/1.0");
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to init libcurl with user agent:({}) {}.", rc, curlErrorBuf_);
+        return XErrorNok;
+    }
+
+    rc = curl_easy_setopt(curl_, CURLOPT_POST, 1L);
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to init libcurl with regular post:({}) {}.", rc, curlErrorBuf_);
+        return XErrorNok;
+    }
+
+    rc = curl_easy_setopt(curl_, CURLOPT_WRITEFUNCTION, writeCallback);
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to init libcurl with write callback:({}) {}.", rc, curlErrorBuf_);
+        return XErrorNok;
+    }
+
+    rc = curl_easy_setopt(curl_, CURLOPT_READFUNCTION, readCallback);
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to init libcurl with read callback:({}) {}.", rc, curlErrorBuf_);
+        return XErrorNok;
+    }
+
+    hdr_ = curl_slist_append(hdr_, "Content-type: application/json");
+    hdr_ = curl_slist_append(hdr_, "Expect:");
+
+    rc = curl_easy_setopt(curl_, CURLOPT_HTTPHEADER, hdr_);
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to init libcurl to use custom headers:({}) {}.", rc, curlErrorBuf_);
+        return XErrorNok;
+    }
+
+    rc = curl_easy_setopt(curl_, CURLOPT_TIMEOUT, option_.timeOut_.count());
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to init libcurl with timeout:({}) {}.", rc, curlErrorBuf_);
+        return XErrorNok;
+    }
+
+    rc = curl_easy_setopt(curl_, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to init libcurl with Baisc Authentication:({}) {}.", rc, curlErrorBuf_);
+        return XErrorNok;
+    }
+
+    rc = curl_easy_setopt(curl_, CURLOPT_USERNAME, option_.userName_.c_str());
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to init libcurl with user name:({}) {}.", rc, curlErrorBuf_);
+        return XErrorNok;
+    }
+
+    rc = curl_easy_setopt(curl_, CURLOPT_PASSWORD, option_.userPasswd_.c_str());
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to init libcurl with user password:({}) {}.", rc, curlErrorBuf_);
+        return XErrorNok;
+    }
+
+    return XErrorOk;
+}
+
+XErrorCode XLibcurlTransport::cleanupLibcurl()
+{
+    if (curl_)
+    {
+        curl_easy_cleanup(curl_);
+        curl_ = nullptr;
+    }
+
+    if (hdr_)
+    {
+        curl_slist_free_all(hdr_);
+        hdr_ = nullptr;
+    }
+
+    curl_global_cleanup();
+
+    return XErrorOk;
+}
+
+XErrorCode XLibcurlTransport::curlPost(const string & body)
+{
+    XMemoryStuct tMem;
+    XMemoryStuct rMem;
+
+    tMem.memory = (char*)body.c_str();
+    tMem.size = body.size();
+
+    rMem.size = 0;
+    rMem.memory = (char*)malloc(1);
+
+    XAutoCleanUp cleanup([&rMem]() { if (rMem.memory)
+        {
+            free(rMem.memory);
+            rMem.memory = nullptr;
+        }
+    });
+
+    auto rc = curl_easy_setopt(curl_, CURLOPT_WRITEDATA, &rMem);
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to init libcurl with write data:({}) {}.", rc, curlErrorBuf_);
+        return XErrorNok;
+    }
+
+    rc = curl_easy_setopt(curl_, CURLOPT_READDATA, &tMem);
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to init libcurl with read data:({}) {}.", rc, curlErrorBuf_);
+        return XErrorNok;
+    }
+
+    rc = curl_easy_setopt(curl_, CURLOPT_POSTFIELDSIZE, tMem.size);
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Fail to set length of post data for libcurl:({}) {}.", rc, curlErrorBuf_);
+        return XErrorNok;
+    }
+
+    SPDLOG_DEBUG("Libcurl posting event:{}.", body);
+    rc = curl_easy_perform(curl_);
+
+    if (rc != CURLE_OK)
+    {
+        SPDLOG_ERROR("Libcurl fails to post event:({}) {}.", rc, curlErrorBuf_);
+        if (rc == CURLE_OPERATION_TIMEDOUT)
+        {
+            return XErrorTimeout;
+        }
+        return XErrorNok;
+    }
+
+    int httpResponseCode = 0;
+    curl_easy_getinfo(curl_, CURLINFO_RESPONSE_CODE, &httpResponseCode);
+    SPDLOG_DEBUG("Post event:{}, response code: ({}), response body:{}.", body, httpResponseCode, rMem.size>0 ? rMem.memory : "None");
+
+    if ((httpResponseCode / 100) == 2)
+    {
+        return XErrorOk;
+    }
+
+    if ((httpResponseCode / 100) == 4)
+    {
+        return XErrorClientError;
+    }
+
+    if ((httpResponseCode / 100) == 5)
+    {
+        return XErrorServerError;
+    }
+
+    return XErrorNok;
+}
+
+size_t XLibcurlTransport::readCallback(void * ptr, size_t size, size_t nmemb, void * userp)
+{
+    size_t rtn = 0;
+    size_t bytesToWrite = 0;
+    XMemoryStuct* tMem = (XMemoryStuct*)userp;
+
+    bytesToWrite = std::min(size*nmemb, tMem->size);
+
+    if (bytesToWrite > 0)
+    {
+        strncpy((char *)ptr, tMem->memory, bytesToWrite);
+        tMem->memory += bytesToWrite;
+        tMem->size -= bytesToWrite;
+        rtn = bytesToWrite;
+    }
+    return rtn;
+}
+
+size_t XLibcurlTransport::writeCallback(void * ptr, size_t size, size_t nmemb, void * userp)
+{
+    size_t realSize = size * nmemb;
+    XMemoryStuct* rMem = (XMemoryStuct*)userp;
+    rMem->memory = (char*)realloc(rMem->memory, rMem->size + realSize + 1);
+    if (rMem->memory == nullptr)
+    {
+        SPDLOG_ERROR("No enough memory.");
+        return 0;
+    }
+
+    memcpy(&(rMem->memory[rMem->size]), ptr, realSize);
+    rMem->size += realSize;
+    rMem->memory[rMem->size] = 0;
+
+    return realSize;
+}
+
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XLibcurlTransport.h b/veslibrary/ves_cpplibrary/src/lib/transport/XLibcurlTransport.h
new file mode 100755
index 0000000..544a5c4
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XLibcurlTransport.h
@@ -0,0 +1,41 @@
+#pragma once
+
+#include <atomic>
+#include <chrono>
+#include <mutex>
+#include <string>
+#include <curl/curl.h>
+#include "XTransport.h"
+
+namespace vagt 
+{
+    namespace transport 
+    {
+        class XLibcurlTransport: public XTransport
+        {
+        public:
+            XLibcurlTransport(const XTransportOption& option);
+
+            virtual ~XLibcurlTransport() {}
+
+            virtual XErrorCode start() override;
+
+            virtual XErrorCode stop() override;
+
+            virtual XErrorCode post(const std::string& event) override;
+
+        private:
+            XErrorCode initLibcurl();
+            XErrorCode cleanupLibcurl();
+            XErrorCode curlPost(const std::string& body);
+
+            static char curlErrorBuf_[CURL_ERROR_SIZE];
+            static size_t readCallback(void *ptr, size_t size, size_t nmemb, void *userp);
+            static size_t writeCallback(void *ptr, size_t size, size_t nmemb, void *userp);
+
+            XTransportOption option_;
+            CURL* curl_;
+            struct curl_slist* hdr_;
+        };
+    }
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XMemQueue.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/XMemQueue.cpp
new file mode 100755
index 0000000..443ab40
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XMemQueue.cpp
@@ -0,0 +1,46 @@
+#include "XMemQueue.h"
+#ifndef SPDLOG_ACTIVE_LEVEL 
+#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_TRACE
+#endif
+#include "spdlog/spdlog.h"
+
+using namespace std;
+using namespace vagt::queue;
+
+vagt::queue::XMemQueue::XMemQueue(int capacity):capacity_(capacity),size_(0)
+{
+
+}
+
+bool vagt::queue::XMemQueue::empty()
+{
+    return 0 == size_;
+}
+
+XErrorCode vagt::queue::XMemQueue::push(const std::string & val)
+{
+    if (size_ >= capacity_)
+    {
+        queue_.pop();
+        SPDLOG_WARN("Drop from queue.");
+        size_--;
+    }
+
+    queue_.push(val);
+    size_++;
+
+    return XErrorOk;
+}
+
+void vagt::queue::XMemQueue::pop()
+{
+    //cal empty() before cal pop()
+    queue_.pop();
+    size_--;
+}
+
+std::string vagt::queue::XMemQueue::front()
+{
+    //cal empty() before cal pop()
+    return queue_.front();
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XMemQueue.h b/veslibrary/ves_cpplibrary/src/lib/transport/XMemQueue.h
new file mode 100755
index 0000000..0a1a651
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XMemQueue.h
@@ -0,0 +1,24 @@
+#pragma once
+
+#include "XQueue.h"
+#include <queue>
+
+namespace vagt
+{
+    namespace queue
+    {
+        class XMemQueue: public XQueue
+        {
+        public:
+            XMemQueue(int capacity);
+            virtual bool empty() override;
+            virtual XErrorCode push(const std::string & val) override;
+            virtual void pop() override;
+            virtual std::string front() override;
+        private:
+            int capacity_;
+            int size_;
+            std::queue<std::string> queue_;
+        };
+    }
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XQueue.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/XQueue.cpp
new file mode 100755
index 0000000..a91de1e
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XQueue.cpp
@@ -0,0 +1,15 @@
+#include "XQueue.h"
+#include "XMemQueue.h"
+#include "XDiskQueue.h"
+
+using namespace vagt::queue;
+
+std::shared_ptr<XQueue> vagt::queue::XQueue::create(int capacity)
+{
+    return std::make_shared<XMemQueue>(capacity);
+}
+
+std::shared_ptr<XQueue> vagt::queue::XQueue::create(const std::string & path)
+{
+    return std::make_shared<XDiskQueue>(path);
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XRetryTransport.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/XRetryTransport.cpp
new file mode 100755
index 0000000..90db0a9
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XRetryTransport.cpp
@@ -0,0 +1,156 @@
+#include "XRetryTransport.h"
+#ifndef SPDLOG_ACTIVE_LEVEL 
+#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_TRACE
+#endif
+#include "spdlog/spdlog.h"
+
+using namespace std;
+using namespace vagt;
+using namespace vagt::transport;
+using namespace spdlog;
+
+XRetryTransport::XRetryTransport(std::shared_ptr<XTransport> transport, std::chrono::milliseconds retryInterval, int tryTimes):
+    transport_(transport),
+    retryInterval_(retryInterval),
+    tryTimes_(tryTimes),
+    isRetryRunning_(false)
+{
+}
+
+XErrorCode XRetryTransport::start()
+{
+    if (!transport_)
+    {
+        SPDLOG_ERROR("Empty transport.");
+        return XErrorNok;
+    }
+
+     auto rc = transport_->start();
+
+     allowPost();
+
+     return rc;
+}
+
+XErrorCode XRetryTransport::stop()
+{
+    cancelPost();
+    if (!transport_)
+    {
+        SPDLOG_ERROR("Empty transport.");
+        return XErrorNok;
+    }
+
+    while (isRetryRunning_.load(std::memory_order_acquire))
+    {
+        SPDLOG_DEBUG("Waiting for retry exit.");
+        std::this_thread::sleep_for(std::chrono::milliseconds(100));
+    }
+
+    return transport_->stop();
+}
+
+XErrorCode XRetryTransport::post(const std::string& event)
+{
+    if (shouldCancelPost())
+    {
+        return XErrorCanceled;
+    }
+
+    if (event.empty())
+    {
+        SPDLOG_WARN("Trying post empty event.");
+        return XErrorClientError;
+    }
+
+    if (!transport_)
+    {
+        SPDLOG_ERROR("Empty transport.");
+        return XErrorNok;
+    }
+
+    XErrorCode rc = XErrorNok;
+
+    isRetryRunning_.store(true, std::memory_order_release);
+
+	int idx = 0;
+    do
+    {
+        SPDLOG_DEBUG("Posting event:{}.", event);
+        rc = transport_->post(event);
+        SPDLOG_DEBUG("Post event:{} ({}).", event, rc);
+        if (rc == XErrorOk || rc == XErrorCanceled)
+        {
+            isRetryRunning_.store(false, std::memory_order_release);
+            return rc;
+        }
+        else if (rc == XErrorClientError)
+        {
+            isRetryRunning_.store(false, std::memory_order_release);
+            SPDLOG_ERROR("Post event:({}).", rc);
+            return rc;
+        }
+        //else if (rc == XErrorTimeout || rc == XErrorServerError || rc == XErrorNetworkError)
+        else 
+        {
+            ++idx;
+            if (shouldCancelPost() || idx>=tryTimes_)
+            {
+                break;
+            }
+
+            SPDLOG_INFO("Stopping transport for retry:({}), time:({}).", rc, idx);
+            transport_->stop();
+            {
+                unique_lock<mutex> lk(lock_);
+                bool cancel = cond_.wait_for(lk, retryInterval_, [this]() { return this->cancel_.load(); });
+                if (cancel)
+                {
+                    isRetryRunning_.store(false, std::memory_order_release);
+                    SPDLOG_INFO("Cancel post event:({}).", rc);
+                    return rc;
+                }
+            }
+
+            SPDLOG_INFO("Starting transport for retry:({}), time:({}).", rc, idx);
+            transport_->start();
+        }
+    }
+    while(true);
+
+
+    isRetryRunning_.store(false, std::memory_order_release);
+    SPDLOG_ERROR("Post event:({}).", rc);
+    return rc;
+}
+
+void vagt::transport::XRetryTransport::cancelPost()
+{
+    XTransport::cancelPost();
+
+    {
+        unique_lock<mutex> lk(lock_);
+        cancel_.store(true, std::memory_order_release);
+        cond_.notify_one();
+    }
+
+    if (transport_)
+    {
+        transport_->cancelPost();
+    }
+}
+
+void vagt::transport::XRetryTransport::allowPost()
+{
+    if (transport_)
+    {
+        transport_->allowPost();
+    }
+    XTransport::allowPost();
+}
+
+bool vagt::transport::XRetryTransport::shouldCancelPost()
+{
+    return XTransport::shouldCancelPost();
+}
+
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XRetryTransport.h b/veslibrary/ves_cpplibrary/src/lib/transport/XRetryTransport.h
new file mode 100755
index 0000000..c6d8521
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XRetryTransport.h
@@ -0,0 +1,43 @@
+#pragma once
+
+#include <chrono>
+#include <atomic>
+#include <condition_variable>
+#include <mutex>
+#include "XTransport.h"
+
+namespace vagt
+{
+    namespace transport
+    {
+        class XRetryTransport : public XTransport
+        {
+        public:
+            XRetryTransport(std::shared_ptr<XTransport> transport, std::chrono::milliseconds retryInterval, int retryTimes);
+
+            virtual ~XRetryTransport() {}
+
+            virtual XErrorCode start() override;
+
+            virtual XErrorCode stop() override;
+
+            virtual XErrorCode post(const std::string& event) override;
+
+            virtual void cancelPost() override;
+
+            virtual void allowPost() override;
+
+            virtual bool shouldCancelPost() override;
+
+        private:
+            std::shared_ptr<XTransport> transport_;
+            std::chrono::milliseconds retryInterval_;
+            int tryTimes_;
+
+            std::atomic<bool> isRetryRunning_;
+
+            std::mutex lock_;
+            std::condition_variable cond_;
+        };
+    }
+}
+\ No newline at end of file
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XRpcClientTransport.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/XRpcClientTransport.cpp
new file mode 100755
index 0000000..a63fc00
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XRpcClientTransport.cpp
@@ -0,0 +1,183 @@
+#include "XRpcClientTransport.h"
+#ifndef SPDLOG_ACTIVE_LEVEL 
+#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_TRACE
+#endif
+#include "spdlog/spdlog.h"
+#include "thrift/TOutput.h"
+
+using namespace std;
+using namespace vagt;
+using namespace vagt::transport;
+using namespace vagt::transport::rpc;
+using namespace ::apache::thrift;
+using namespace ::apache::thrift::protocol;
+using namespace ::apache::thrift::transport;
+
+void DummyOutput(const char* msg)
+{
+    SPDLOG_INFO("{}", msg);
+}
+
+vagt::transport::XRpcClientTransport::XRpcClientTransport(const XTransportOption & option):
+    option_(option)
+{
+}
+
+vagt::transport::XRpcClientTransport::~XRpcClientTransport()
+{
+}
+
+XErrorCode vagt::transport::XRpcClientTransport::start()
+{
+    auto rc = startRPC();
+
+    allowPost();
+
+    return rc;
+}
+
+XErrorCode vagt::transport::XRpcClientTransport::stop()
+{
+    cancelPost();
+    return stopRPC();
+}
+
+XErrorCode vagt::transport::XRpcClientTransport::post(const std::string & event)
+{
+    if (shouldCancelPost())
+    {
+        return XErrorCanceled;
+    }
+
+    if (event.empty())
+    {
+        SPDLOG_WARN("Trying post empty event.");
+        return XErrorClientError;
+    }
+
+    if (!rpcClient_)
+    {
+        SPDLOG_ERROR("RPC client is not started.");
+        return XErrorNok;
+    }
+
+    try
+    {
+        return (XErrorCode)(rpcClient_->post(event));
+    }
+    catch (TTransportException ex)
+    {
+        SPDLOG_ERROR("Fail to post event:({}).", ex.what());
+        return XErrorNetworkError;
+    }
+    catch (TException ex)
+    {
+        SPDLOG_ERROR("Fail to post event:({}).", ex.what());
+        return XErrorNetworkError;
+    }
+    catch (...)
+    {
+        SPDLOG_ERROR("Fail to post event.");
+        return XErrorNetworkError;
+    }
+}
+
+void vagt::transport::XRpcClientTransport::cancelPost()
+{
+    XTransport::cancelPost();
+}
+
+void vagt::transport::XRpcClientTransport::allowPost()
+{
+    XTransport::allowPost();
+}
+
+bool vagt::transport::XRpcClientTransport::shouldCancelPost()
+{
+    return XTransport::shouldCancelPost();
+}
+
+XErrorCode vagt::transport::XRpcClientTransport::startRPC()
+{
+    GlobalOutput.setOutputFunction(DummyOutput);
+
+    string host("127.0.0.1");
+    if (!option_.host_.empty())
+    {
+        host = option_.host_;
+    }
+
+    int port = 5678;
+    if (option_.port_ > 1024)
+    {
+        port = option_.port_;
+    }
+
+    SPDLOG_INFO("Connecting to RPC server:({}:{}).", host, port);
+
+    int timeout = 1000;
+    if (option_.timeOut_.count() >0)
+    {
+        timeout = option_.timeOut_.count();
+    }
+
+    auto socket = std::make_shared<TSocket>(host, port);
+    socket->setConnTimeout(timeout);
+    socket->setRecvTimeout(timeout);
+    socket->setSendTimeout(timeout);
+    rpcTransport_ = std::make_shared<TBufferedTransport>(socket);
+    auto protocol = std::make_shared<TCompactProtocol>(rpcTransport_);
+    rpcClient_ = std::make_shared<vagt::transport::rpc::XRpcTransportClient>(protocol);
+
+    try
+    {
+        rpcTransport_->open();
+    }
+    catch (TTransportException ex)
+    {
+        SPDLOG_ERROR("Fail to start rpc client:({}).", ex.what());
+        return XErrorNok;
+    }
+    catch (TException ex)
+    {
+        SPDLOG_ERROR("Fail to start rpc client:({}).", ex.what());
+        return XErrorNok;
+    }
+    catch (...)
+    {
+        SPDLOG_ERROR("Fail to start rpc client.");
+        return XErrorNok;
+    }
+
+    return XErrorOk;
+}
+
+XErrorCode vagt::transport::XRpcClientTransport::stopRPC()
+{
+    if (!rpcTransport_)
+    {
+        return XErrorNok;
+    }
+
+    try
+    {
+        rpcTransport_->close();
+        rpcTransport_.reset();
+    }
+    catch (TTransportException ex)
+    {
+        SPDLOG_ERROR("Fail to stop rpc client:({}).", ex.what());
+        return XErrorNok;
+    }
+    catch (TException ex)
+    {
+        SPDLOG_ERROR("Fail to stop rpc client:({}).", ex.what());
+        return XErrorNok;
+    }
+    catch (...)
+    {
+        SPDLOG_ERROR("Fail to stop rpc client.");
+        return XErrorNok;
+    }
+    return XErrorOk;
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XRpcClientTransport.h b/veslibrary/ves_cpplibrary/src/lib/transport/XRpcClientTransport.h
new file mode 100755
index 0000000..8284d7b
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XRpcClientTransport.h
@@ -0,0 +1,38 @@
+#pragma once
+
+#include "XTransport.h"
+#include "thrift/transport/TSocket.h"
+#include "thrift/protocol/TCompactProtocol.h"
+#include "thrift/transport/TBufferTransports.h"
+#include "gen-cpp/rpc_constants.h"
+#include "gen-cpp/rpc_types.h"
+#include "gen-cpp/XRpcTransport.h"
+
+namespace vagt
+{
+    namespace transport
+    {
+        class XRpcClientTransport : public XTransport
+        {
+        public:
+            XRpcClientTransport(const XTransportOption& option);
+            virtual ~XRpcClientTransport();
+
+            virtual XErrorCode start() override;
+            virtual XErrorCode stop() override;
+            virtual XErrorCode post(const std::string& event) override;
+
+            virtual void cancelPost() override;
+            virtual void allowPost() override;
+            virtual bool shouldCancelPost() override;
+        private:
+            XErrorCode startRPC();
+            XErrorCode stopRPC();
+
+            XTransportOption option_;
+
+            std::shared_ptr<apache::thrift::transport::TTransport> rpcTransport_;
+            std::shared_ptr<vagt::transport::rpc::XRpcTransportClient> rpcClient_;
+        };
+    }
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XRpcServertTransport.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/XRpcServertTransport.cpp
new file mode 100755
index 0000000..c18db8b
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XRpcServertTransport.cpp
@@ -0,0 +1,222 @@
+#include "XRpcServertTransport.h"
+#include "thrift/transport/TServerSocket.h"
+#include "thrift/server/TThreadedServer.h"
+#include "thrift/protocol/TCompactProtocol.h"
+#include "thrift/transport/TBufferTransports.h"
+#include "thrift/transport/TSocket.h"
+#ifndef SPDLOG_ACTIVE_LEVEL 
+#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_TRACE
+#endif
+#include "spdlog/spdlog.h"
+
+using namespace std;
+using namespace vagt::transport;
+using namespace vagt::transport::rpc;
+using namespace apache::thrift;
+using namespace apache::thrift::protocol;
+using namespace apache::thrift::transport;
+using namespace apache::thrift::server;
+
+constexpr auto XRpcServerIdleTime = 60 * 60 * 1000;
+
+class XRpcTransportImp:public XRpcTransportIf 
+{
+public:
+    XRpcTransportImp(XTransport* transport):transport_(transport)
+    {
+    }
+
+    virtual int16_t post(const std::string & data) override
+    {
+        if (transport_)
+        {
+            return transport_->post(data);
+        }
+    }
+private:
+    XTransport* transport_;
+};
+
+class XRpcTransportFactory : public XRpcTransportIfFactory
+{
+public:
+    XRpcTransportFactory(XTransport* transport):transport_(transport)
+    {
+    }
+
+    XRpcTransportIf* getHandler(const ::apache::thrift::TConnectionInfo& connInfo)
+    {
+        shared_ptr<TSocket> sock = dynamic_pointer_cast<TSocket>(connInfo.transport);
+        if (sock)
+        {
+            auto pt = new XRpcTransportImp(transport_);
+            SPDLOG_INFO("New RPC client connection from:({}:{}), handler:({:x}).", sock->getPeerAddress(), sock->getPeerPort(), (unsigned long)pt);
+            return pt;
+        }
+        return nullptr;
+    }
+
+    void releaseHandler(XRpcTransportIf* handler)
+    {
+        SPDLOG_INFO("Clean RPC client handler:({:x}).", (unsigned long)handler);
+
+        if (handler)
+        {
+            delete handler;
+            handler = nullptr;
+        }
+    }
+private:
+    XTransport* transport_;
+};
+
+vagt::transport::XRpcServerTransport::XRpcServerTransport(std::shared_ptr<XTransport> transport, const XTransportOption & option):
+    transport_(transport),
+    option_(option)
+{
+}
+
+vagt::transport::XRpcServerTransport::~XRpcServerTransport()
+{
+}
+
+XErrorCode vagt::transport::XRpcServerTransport::start()
+{
+    if (!transport_)
+    {
+        SPDLOG_ERROR("Empty transport.");
+        return XErrorNok;
+    }
+
+    transport_->start();
+
+    startRPC();
+
+    allowPost();
+
+    return XErrorOk;
+}
+
+XErrorCode vagt::transport::XRpcServerTransport::stop()
+{
+    cancelPost();
+    if (!transport_)
+    {
+        SPDLOG_ERROR("Empty transport.");
+        return XErrorNok;
+    }
+
+    stopRPC();
+
+    future_.get();
+
+    return transport_->stop();
+}
+
+XErrorCode vagt::transport::XRpcServerTransport::post(const std::string & event)
+{
+    if (shouldCancelPost())
+    {
+        return XErrorCanceled;
+    }
+
+    if (event.empty())
+    {
+        SPDLOG_WARN("Trying post empty event.");
+        return XErrorClientError;
+    }
+
+    if (!transport_)
+    {
+        SPDLOG_ERROR("Empty transport.");
+        return XErrorNok;
+    }
+
+    return transport_->post(event);
+}
+
+void vagt::transport::XRpcServerTransport::cancelPost()
+{
+    XTransport::cancelPost();
+
+    if (transport_)
+    {
+        transport_->cancelPost();
+    }
+}
+
+void vagt::transport::XRpcServerTransport::allowPost()
+{
+    if (transport_)
+    {
+        transport_->allowPost();
+    }
+    XTransport::allowPost();
+}
+
+bool vagt::transport::XRpcServerTransport::shouldCancelPost()
+{
+    return XTransport::shouldCancelPost();
+}
+
+XErrorCode vagt::transport::XRpcServerTransport::startRPC()
+{
+    future_ = std::async(launch::async, [this]() {return this->worker(); });
+    return XErrorOk;
+}
+
+XErrorCode vagt::transport::XRpcServerTransport::stopRPC()
+{
+    if (rpcServer_)
+    {
+        rpcServer_->stop();
+    }
+    return XErrorOk;
+}
+
+void vagt::transport::XRpcServerTransport::worker()
+{
+    string source("0.0.0.0");
+    if (!option_.sourceIp_.empty())
+    {
+        source = option_.sourceIp_;
+    }
+
+    int port = 5678;
+    if (option_.port_ > 1024)
+    {
+        port = option_.port_;
+    }
+
+    SPDLOG_INFO("Start RPC transport thread:({}:{}).", source, port);
+
+    auto serverSocket = make_shared<TServerSocket>(source, port);
+    serverSocket->setRecvTimeout(XRpcServerIdleTime);
+    rpcServer_ = make_shared<TThreadedServer>(
+        make_shared<XRpcTransportProcessorFactory>(make_shared<XRpcTransportFactory>(this)),
+        serverSocket,
+        make_shared<TBufferedTransportFactory>(),
+        make_shared<TCompactProtocolFactory>());
+
+    while (!shouldCancelPost())
+    {
+        try
+        {
+            rpcServer_->serve();
+        }
+        catch (apache::thrift::TException ex)
+        {
+            SPDLOG_ERROR("{}", ex.what());
+            this_thread::sleep_for(chrono::seconds(1));
+            continue;
+        }
+        catch (...)
+        {
+            SPDLOG_ERROR("Unknown Exception in thrift.");
+            this_thread::sleep_for(chrono::seconds(1));
+            continue;
+        }
+    }
+
+    SPDLOG_INFO("Quit RPC transport thread.");
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XRpcServertTransport.h b/veslibrary/ves_cpplibrary/src/lib/transport/XRpcServertTransport.h
new file mode 100755
index 0000000..14eab07
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XRpcServertTransport.h
@@ -0,0 +1,39 @@
+#pragma once
+
+#include "XTransport.h"
+#include "thrift/server/TServer.h"
+#include "gen-cpp/rpc_constants.h"
+#include "gen-cpp/rpc_types.h"
+#include "gen-cpp/XRpcTransport.h"
+#include <future>
+
+namespace vagt
+{
+    namespace transport
+    {
+        class XRpcServerTransport : public XTransport
+        {
+        public:
+            XRpcServerTransport(std::shared_ptr<XTransport> transport, const XTransportOption& option);
+            virtual ~XRpcServerTransport();
+
+            virtual XErrorCode start() override;
+            virtual XErrorCode stop() override;
+            virtual XErrorCode post(const std::string& event) override;
+
+            virtual void cancelPost() override;
+            virtual void allowPost() override;
+            virtual bool shouldCancelPost() override;
+        private:
+            XErrorCode startRPC();
+            XErrorCode stopRPC();
+            void worker();
+            std::future<void> future_;
+
+            std::shared_ptr<XTransport> transport_;
+            XTransportOption option_;
+
+            std::shared_ptr<apache::thrift::server::TServer> rpcServer_;
+        };
+    }
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XSwitchableTransport.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/XSwitchableTransport.cpp
new file mode 100755
index 0000000..26e44ac
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XSwitchableTransport.cpp
@@ -0,0 +1,172 @@
+#include "XSwitchableTransport.h"
+#ifndef SPDLOG_ACTIVE_LEVEL 
+#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_TRACE
+#endif
+#include "spdlog/spdlog.h"
+
+using namespace std;
+using namespace vagt;
+using namespace vagt::transport;
+
+XSwitchableTransport::XSwitchableTransport(std::vector<std::shared_ptr<XTransport>>& processors):
+    transports_(processors),
+    transportIndex_(0)
+{
+}
+
+void XSwitchableTransport::cancelPost()
+{
+    XTransport::cancelPost();
+    for (auto transport : transports_)
+    {
+        if (transport)
+        {
+            transport->cancelPost();
+        }
+    }
+}
+
+void XSwitchableTransport::allowPost()
+{
+    for (auto transport : transports_)
+    {
+        if (transport)
+        {
+            transport->allowPost();
+        }
+    }
+    XTransport::allowPost();
+}
+
+bool XSwitchableTransport::shouldCancelPost()
+{
+    return XTransport::shouldCancelPost();
+}
+
+XErrorCode XSwitchableTransport::tryTransport(const std::string& event)
+{
+    auto transport = transports_[transportIndex_];
+    if (!transport)
+    {
+        SPDLOG_ERROR("Empty transport.");
+        return XErrorNok;
+    }
+
+    SPDLOG_DEBUG("Transport({}) posting event:{}.", transportIndex_, event);
+    return transport->post(event);
+}
+
+void XSwitchableTransport::switchTransport(XErrorCode reason)
+{
+    SPDLOG_INFO("Switching transport:({}).", reason);
+
+    auto transport = transports_[transportIndex_];
+    if (!transport)
+    {
+        SPDLOG_ERROR("Empty transport.");
+        return;
+    }
+
+    transport->stop();
+
+    ++transportIndex_;
+    if (transportIndex_ >= transports_.size())
+    {
+        transportIndex_ = 0;
+    }
+
+    SPDLOG_INFO("Switch to transport, index:({}).", transportIndex_);
+    transport = transports_[transportIndex_];
+    if (!transport)
+    {
+        SPDLOG_ERROR("Empty transport({}).", transportIndex_);
+        return;
+    }
+
+    transport->start();
+}
+
+XErrorCode XSwitchableTransport::start()
+{
+    if (transportIndex_ >= transports_.size())
+    {
+        SPDLOG_ERROR("Transport index ({}) >= transport number ({}).", transportIndex_, transports_.size());
+        return XErrorNok;
+    }
+
+    auto transport = transports_[transportIndex_];
+    XErrorCode rc = XErrorNok;
+    if (transport)
+    {
+        rc = transport->start();
+    }
+
+    allowPost();
+
+    return rc;
+}
+
+XErrorCode XSwitchableTransport::stop()
+{
+    cancelPost();
+
+    if (transportIndex_ >= transports_.size())
+    {
+        SPDLOG_ERROR("Transport index ({}) >= transport number ({}).", transportIndex_, transports_.size());
+        return XErrorNok;
+    }
+
+    auto transport = transports_[transportIndex_];
+    XErrorCode rc = XErrorNok;
+    if (transport)
+    {
+        rc = transport->stop();
+    }
+
+    return rc;
+}
+
+XErrorCode XSwitchableTransport::post(const std::string& event)
+{
+    if (shouldCancelPost())
+    {
+        return XErrorCanceled;
+    }
+
+    if (event.empty())
+    {
+        SPDLOG_WARN("Trying post empty event.");
+        return XErrorClientError;
+    }
+
+    if (transportIndex_ >= transports_.size())
+    {
+        SPDLOG_ERROR("Transport index ({}) >= transport number ({}).", transportIndex_, transports_.size());
+        return XErrorNok;
+    }
+
+    auto rc = XErrorNok;
+    for (auto i = 0;
+        !shouldCancelPost() && i < transports_.size();
+        ++i)
+    {
+        rc = tryTransport(event);
+        if (rc == XErrorOk ||
+            rc == XErrorClientError ||
+            rc == XErrorCanceled)
+        {
+            return rc;
+        }
+        else
+        {
+            if (shouldCancelPost())
+            {
+                break;
+            }
+            switchTransport(rc);
+        }
+    }
+
+    return rc;
+}
+
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XSwitchableTransport.h b/veslibrary/ves_cpplibrary/src/lib/transport/XSwitchableTransport.h
new file mode 100755
index 0000000..e4bb82b
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XSwitchableTransport.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <vector>
+#include "XTransport.h"
+
+namespace vagt
+{
+    namespace transport
+    {
+        class XSwitchableTransport : public XTransport
+        {
+        public:
+            XSwitchableTransport(std::vector<std::shared_ptr<XTransport>>& processors);
+
+            virtual ~XSwitchableTransport() {}
+
+            virtual XErrorCode start() override;
+
+            virtual XErrorCode stop() override;
+
+            virtual XErrorCode post(const std::string& event) override;
+
+            virtual void cancelPost() override;
+
+            virtual void allowPost() override;
+
+            virtual bool shouldCancelPost() override;
+
+        private:
+            XErrorCode tryTransport(const std::string& event);
+            void switchTransport(vagt::transport::XErrorCode reason);
+
+            std::vector<std::shared_ptr<XTransport>> transports_;
+            unsigned int transportIndex_;
+        };
+    }
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XSynchronizedTransport.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/XSynchronizedTransport.cpp
new file mode 100755
index 0000000..88f4dfa
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XSynchronizedTransport.cpp
@@ -0,0 +1,115 @@
+#include "XSynchronizedTransport.h"
+#ifndef SPDLOG_ACTIVE_LEVEL 
+#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_TRACE
+#endif
+#include "spdlog/spdlog.h"
+
+using namespace std;
+using namespace vagt;
+using namespace vagt::transport;
+
+XSynchronizedTransport::XSynchronizedTransport(std::shared_ptr<XTransport> transport):
+    transport_(transport),
+    status_(XStopped)
+{
+}
+
+XErrorCode XSynchronizedTransport::start()
+{
+    unique_lock<mutex> lk(controlLock_);
+
+    if (status_ == XStarted)
+    {
+        return XErrorOk;
+    }
+
+    XErrorCode rc = XErrorNok;
+    if (transport_)
+    {
+        rc = transport_->start();
+    }
+
+    if (rc == XErrorOk)
+    {
+        status_ = XStarted;
+    }
+
+    allowPost();
+
+    return rc;
+}
+
+XErrorCode XSynchronizedTransport::stop()
+{
+    unique_lock<mutex> lk(controlLock_);
+
+    if (status_ == XStopped)
+    {
+        return XErrorOk;
+    }
+
+    cancelPost();
+
+    if (transport_)
+    {
+        transport_->cancelPost();
+    }
+
+    unique_lock<mutex> lkPost(postLock_);
+    XErrorCode rc = XErrorNok;
+    if (transport_)
+    {
+        rc = transport_->stop();
+    }
+
+    if (rc == XErrorOk)
+    {
+        status_ = XStopped;
+    }
+    return rc;
+}
+
+XErrorCode XSynchronizedTransport::post(const std::string& event)
+{
+    if (shouldCancelPost())
+    {
+        return XErrorCanceled;
+    }
+
+    if (event.empty())
+    {
+        SPDLOG_WARN("Trying post empty event.");
+        return XErrorClientError;
+    }
+
+    unique_lock<mutex> lk(postLock_);
+    if (transport_)
+    {
+        return transport_->post(event);
+    }
+    return XErrorNok;
+}
+
+void XSynchronizedTransport::cancelPost()
+{
+    XTransport::cancelPost();
+
+    if (transport_)
+    {
+        transport_->cancelPost();
+    }
+}
+
+void XSynchronizedTransport::allowPost()
+{
+    if (transport_)
+    {
+        transport_->allowPost();
+    }
+    XTransport::allowPost();
+}
+
+bool XSynchronizedTransport::shouldCancelPost()
+{
+    return XTransport::shouldCancelPost();
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XSynchronizedTransport.h b/veslibrary/ves_cpplibrary/src/lib/transport/XSynchronizedTransport.h
new file mode 100755
index 0000000..85b16d9
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XSynchronizedTransport.h
@@ -0,0 +1,41 @@
+#pragma once
+#include <mutex>
+#include "XTransport.h"
+
+namespace vagt
+{
+    namespace transport
+    {
+        class XSynchronizedTransport : public XTransport
+        {
+        public:
+            enum XStatus : unsigned short
+            {
+                XStarted,
+                XStopped,
+            };
+
+            XSynchronizedTransport(std::shared_ptr<XTransport> transport);
+
+            virtual ~XSynchronizedTransport() {}
+
+            virtual XErrorCode start() override;
+
+            virtual XErrorCode stop() override;
+
+            virtual XErrorCode post(const std::string& event) override;
+
+            virtual void cancelPost() override;
+
+            virtual void allowPost() override;
+
+            virtual bool shouldCancelPost() override;
+
+        private:
+            std::mutex postLock_;
+            std::mutex controlLock_;
+            std::shared_ptr<XTransport> transport_;
+            XStatus status_;
+        };
+    }
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/XTransport.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/XTransport.cpp
new file mode 100755
index 0000000..ac61acc
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/XTransport.cpp
@@ -0,0 +1,64 @@
+#include "XTransport.h"
+#include "XLibcurlTransport.h"
+#include "XRetryTransport.h"
+#include "XSwitchableTransport.h"
+#include "XSynchronizedTransport.h"
+#include "XBufferedTransport.h"
+#include "XRpcClientTransport.h"
+#include "XRpcServertTransport.h"
+
+using namespace vagt::transport;
+
+XTransport::XTransport():cancel_(true)
+{
+}
+
+void XTransport::cancelPost()
+{
+    cancel_.store(true, std::memory_order_release);
+}
+
+void XTransport::allowPost()
+{
+    cancel_.store(false, std::memory_order_release);
+}
+
+bool XTransport::shouldCancelPost()
+{
+    return cancel_.load(std::memory_order_acquire);
+}
+
+std::shared_ptr<XTransport> vagt::transport::XTransport::LibCurlTransport(const XTransportOption & option)
+{
+    return std::make_shared<XLibcurlTransport>(option);
+}
+
+std::shared_ptr<XTransport> vagt::transport::XTransport::RetryTransport(std::shared_ptr<XTransport> transport, std::chrono::milliseconds retryInterval, int retryTimes)
+{
+    return std::make_shared<XRetryTransport>(transport, retryInterval, retryTimes);
+}
+
+std::shared_ptr<XTransport> vagt::transport::XTransport::SwitchableTransport(std::vector<std::shared_ptr<XTransport>>& transports)
+{
+    return std::make_shared<XSwitchableTransport>(transports);
+}
+
+std::shared_ptr<XTransport> vagt::transport::XTransport::SynchronizedTransport(std::shared_ptr<XTransport> transport)
+{
+    return std::make_shared<XSynchronizedTransport>(transport);
+}
+
+std::shared_ptr<XTransport> vagt::transport::XTransport::BufferedTransport(std::shared_ptr<XTransport> transport, std::shared_ptr<vagt::queue::XQueue> queue)
+{
+    return std::make_shared<XBufferedTransport>(transport, queue);
+}
+
+std::shared_ptr<XTransport> vagt::transport::XTransport::RpcClientTransport(const XTransportOption& option)
+{
+    return std::make_shared<XRpcClientTransport>(option);
+}
+
+std::shared_ptr<XTransport> vagt::transport::XTransport::RpcServerTransport(std::shared_ptr<XTransport> transport, const XTransportOption& option)
+{
+    return std::make_shared<XRpcServerTransport>(transport, option);
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/XRpcTransport.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/XRpcTransport.cpp
new file mode 100755
index 0000000..0cdd75b
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/XRpcTransport.cpp
@@ -0,0 +1,421 @@
+/**
+ * Autogenerated by Thrift Compiler (0.12.0)
+ *
+ * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+ *  @generated
+ */
+#include "XRpcTransport.h"
+
+namespace vagt { namespace transport { namespace rpc {
+
+
+XRpcTransport_post_args::~XRpcTransport_post_args() throw() {
+}
+
+
+uint32_t XRpcTransport_post_args::read(::apache::thrift::protocol::TProtocol* iprot) {
+
+  ::apache::thrift::protocol::TInputRecursionTracker tracker(*iprot);
+  uint32_t xfer = 0;
+  std::string fname;
+  ::apache::thrift::protocol::TType ftype;
+  int16_t fid;
+
+  xfer += iprot->readStructBegin(fname);
+
+  using ::apache::thrift::protocol::TProtocolException;
+
+
+  while (true)
+  {
+    xfer += iprot->readFieldBegin(fname, ftype, fid);
+    if (ftype == ::apache::thrift::protocol::T_STOP) {
+      break;
+    }
+    switch (fid)
+    {
+      case 1:
+        if (ftype == ::apache::thrift::protocol::T_STRING) {
+          xfer += iprot->readString(this->data);
+          this->__isset.data = true;
+        } else {
+          xfer += iprot->skip(ftype);
+        }
+        break;
+      default:
+        xfer += iprot->skip(ftype);
+        break;
+    }
+    xfer += iprot->readFieldEnd();
+  }
+
+  xfer += iprot->readStructEnd();
+
+  return xfer;
+}
+
+uint32_t XRpcTransport_post_args::write(::apache::thrift::protocol::TProtocol* oprot) const {
+  uint32_t xfer = 0;
+  ::apache::thrift::protocol::TOutputRecursionTracker tracker(*oprot);
+  xfer += oprot->writeStructBegin("XRpcTransport_post_args");
+
+  xfer += oprot->writeFieldBegin("data", ::apache::thrift::protocol::T_STRING, 1);
+  xfer += oprot->writeString(this->data);
+  xfer += oprot->writeFieldEnd();
+
+  xfer += oprot->writeFieldStop();
+  xfer += oprot->writeStructEnd();
+  return xfer;
+}
+
+
+XRpcTransport_post_pargs::~XRpcTransport_post_pargs() throw() {
+}
+
+
+uint32_t XRpcTransport_post_pargs::write(::apache::thrift::protocol::TProtocol* oprot) const {
+  uint32_t xfer = 0;
+  ::apache::thrift::protocol::TOutputRecursionTracker tracker(*oprot);
+  xfer += oprot->writeStructBegin("XRpcTransport_post_pargs");
+
+  xfer += oprot->writeFieldBegin("data", ::apache::thrift::protocol::T_STRING, 1);
+  xfer += oprot->writeString((*(this->data)));
+  xfer += oprot->writeFieldEnd();
+
+  xfer += oprot->writeFieldStop();
+  xfer += oprot->writeStructEnd();
+  return xfer;
+}
+
+
+XRpcTransport_post_result::~XRpcTransport_post_result() throw() {
+}
+
+
+uint32_t XRpcTransport_post_result::read(::apache::thrift::protocol::TProtocol* iprot) {
+
+  ::apache::thrift::protocol::TInputRecursionTracker tracker(*iprot);
+  uint32_t xfer = 0;
+  std::string fname;
+  ::apache::thrift::protocol::TType ftype;
+  int16_t fid;
+
+  xfer += iprot->readStructBegin(fname);
+
+  using ::apache::thrift::protocol::TProtocolException;
+
+
+  while (true)
+  {
+    xfer += iprot->readFieldBegin(fname, ftype, fid);
+    if (ftype == ::apache::thrift::protocol::T_STOP) {
+      break;
+    }
+    switch (fid)
+    {
+      case 0:
+        if (ftype == ::apache::thrift::protocol::T_I16) {
+          xfer += iprot->readI16(this->success);
+          this->__isset.success = true;
+        } else {
+          xfer += iprot->skip(ftype);
+        }
+        break;
+      default:
+        xfer += iprot->skip(ftype);
+        break;
+    }
+    xfer += iprot->readFieldEnd();
+  }
+
+  xfer += iprot->readStructEnd();
+
+  return xfer;
+}
+
+uint32_t XRpcTransport_post_result::write(::apache::thrift::protocol::TProtocol* oprot) const {
+
+  uint32_t xfer = 0;
+
+  xfer += oprot->writeStructBegin("XRpcTransport_post_result");
+
+  if (this->__isset.success) {
+    xfer += oprot->writeFieldBegin("success", ::apache::thrift::protocol::T_I16, 0);
+    xfer += oprot->writeI16(this->success);
+    xfer += oprot->writeFieldEnd();
+  }
+  xfer += oprot->writeFieldStop();
+  xfer += oprot->writeStructEnd();
+  return xfer;
+}
+
+
+XRpcTransport_post_presult::~XRpcTransport_post_presult() throw() {
+}
+
+
+uint32_t XRpcTransport_post_presult::read(::apache::thrift::protocol::TProtocol* iprot) {
+
+  ::apache::thrift::protocol::TInputRecursionTracker tracker(*iprot);
+  uint32_t xfer = 0;
+  std::string fname;
+  ::apache::thrift::protocol::TType ftype;
+  int16_t fid;
+
+  xfer += iprot->readStructBegin(fname);
+
+  using ::apache::thrift::protocol::TProtocolException;
+
+
+  while (true)
+  {
+    xfer += iprot->readFieldBegin(fname, ftype, fid);
+    if (ftype == ::apache::thrift::protocol::T_STOP) {
+      break;
+    }
+    switch (fid)
+    {
+      case 0:
+        if (ftype == ::apache::thrift::protocol::T_I16) {
+          xfer += iprot->readI16((*(this->success)));
+          this->__isset.success = true;
+        } else {
+          xfer += iprot->skip(ftype);
+        }
+        break;
+      default:
+        xfer += iprot->skip(ftype);
+        break;
+    }
+    xfer += iprot->readFieldEnd();
+  }
+
+  xfer += iprot->readStructEnd();
+
+  return xfer;
+}
+
+int16_t XRpcTransportClient::post(const std::string& data)
+{
+  send_post(data);
+  return recv_post();
+}
+
+void XRpcTransportClient::send_post(const std::string& data)
+{
+  int32_t cseqid = 0;
+  oprot_->writeMessageBegin("post", ::apache::thrift::protocol::T_CALL, cseqid);
+
+  XRpcTransport_post_pargs args;
+  args.data = &data;
+  args.write(oprot_);
+
+  oprot_->writeMessageEnd();
+  oprot_->getTransport()->writeEnd();
+  oprot_->getTransport()->flush();
+}
+
+int16_t XRpcTransportClient::recv_post()
+{
+
+  int32_t rseqid = 0;
+  std::string fname;
+  ::apache::thrift::protocol::TMessageType mtype;
+
+  iprot_->readMessageBegin(fname, mtype, rseqid);
+  if (mtype == ::apache::thrift::protocol::T_EXCEPTION) {
+    ::apache::thrift::TApplicationException x;
+    x.read(iprot_);
+    iprot_->readMessageEnd();
+    iprot_->getTransport()->readEnd();
+    throw x;
+  }
+  if (mtype != ::apache::thrift::protocol::T_REPLY) {
+    iprot_->skip(::apache::thrift::protocol::T_STRUCT);
+    iprot_->readMessageEnd();
+    iprot_->getTransport()->readEnd();
+  }
+  if (fname.compare("post") != 0) {
+    iprot_->skip(::apache::thrift::protocol::T_STRUCT);
+    iprot_->readMessageEnd();
+    iprot_->getTransport()->readEnd();
+  }
+  int16_t _return;
+  XRpcTransport_post_presult result;
+  result.success = &_return;
+  result.read(iprot_);
+  iprot_->readMessageEnd();
+  iprot_->getTransport()->readEnd();
+
+  if (result.__isset.success) {
+    return _return;
+  }
+  throw ::apache::thrift::TApplicationException(::apache::thrift::TApplicationException::MISSING_RESULT, "post failed: unknown result");
+}
+
+bool XRpcTransportProcessor::dispatchCall(::apache::thrift::protocol::TProtocol* iprot, ::apache::thrift::protocol::TProtocol* oprot, const std::string& fname, int32_t seqid, void* callContext) {
+  ProcessMap::iterator pfn;
+  pfn = processMap_.find(fname);
+  if (pfn == processMap_.end()) {
+    iprot->skip(::apache::thrift::protocol::T_STRUCT);
+    iprot->readMessageEnd();
+    iprot->getTransport()->readEnd();
+    ::apache::thrift::TApplicationException x(::apache::thrift::TApplicationException::UNKNOWN_METHOD, "Invalid method name: '"+fname+"'");
+    oprot->writeMessageBegin(fname, ::apache::thrift::protocol::T_EXCEPTION, seqid);
+    x.write(oprot);
+    oprot->writeMessageEnd();
+    oprot->getTransport()->writeEnd();
+    oprot->getTransport()->flush();
+    return true;
+  }
+  (this->*(pfn->second))(seqid, iprot, oprot, callContext);
+  return true;
+}
+
+void XRpcTransportProcessor::process_post(int32_t seqid, ::apache::thrift::protocol::TProtocol* iprot, ::apache::thrift::protocol::TProtocol* oprot, void* callContext)
+{
+  void* ctx = NULL;
+  if (this->eventHandler_.get() != NULL) {
+    ctx = this->eventHandler_->getContext("XRpcTransport.post", callContext);
+  }
+  ::apache::thrift::TProcessorContextFreer freer(this->eventHandler_.get(), ctx, "XRpcTransport.post");
+
+  if (this->eventHandler_.get() != NULL) {
+    this->eventHandler_->preRead(ctx, "XRpcTransport.post");
+  }
+
+  XRpcTransport_post_args args;
+  args.read(iprot);
+  iprot->readMessageEnd();
+  uint32_t bytes = iprot->getTransport()->readEnd();
+
+  if (this->eventHandler_.get() != NULL) {
+    this->eventHandler_->postRead(ctx, "XRpcTransport.post", bytes);
+  }
+
+  XRpcTransport_post_result result;
+  try {
+    result.success = iface_->post(args.data);
+    result.__isset.success = true;
+  } catch (const std::exception& e) {
+    if (this->eventHandler_.get() != NULL) {
+      this->eventHandler_->handlerError(ctx, "XRpcTransport.post");
+    }
+
+    ::apache::thrift::TApplicationException x(e.what());
+    oprot->writeMessageBegin("post", ::apache::thrift::protocol::T_EXCEPTION, seqid);
+    x.write(oprot);
+    oprot->writeMessageEnd();
+    oprot->getTransport()->writeEnd();
+    oprot->getTransport()->flush();
+    return;
+  }
+
+  if (this->eventHandler_.get() != NULL) {
+    this->eventHandler_->preWrite(ctx, "XRpcTransport.post");
+  }
+
+  oprot->writeMessageBegin("post", ::apache::thrift::protocol::T_REPLY, seqid);
+  result.write(oprot);
+  oprot->writeMessageEnd();
+  bytes = oprot->getTransport()->writeEnd();
+  oprot->getTransport()->flush();
+
+  if (this->eventHandler_.get() != NULL) {
+    this->eventHandler_->postWrite(ctx, "XRpcTransport.post", bytes);
+  }
+}
+
+::apache::thrift::stdcxx::shared_ptr< ::apache::thrift::TProcessor > XRpcTransportProcessorFactory::getProcessor(const ::apache::thrift::TConnectionInfo& connInfo) {
+  ::apache::thrift::ReleaseHandler< XRpcTransportIfFactory > cleanup(handlerFactory_);
+  ::apache::thrift::stdcxx::shared_ptr< XRpcTransportIf > handler(handlerFactory_->getHandler(connInfo), cleanup);
+  ::apache::thrift::stdcxx::shared_ptr< ::apache::thrift::TProcessor > processor(new XRpcTransportProcessor(handler));
+  return processor;
+}
+
+int16_t XRpcTransportConcurrentClient::post(const std::string& data)
+{
+  int32_t seqid = send_post(data);
+  return recv_post(seqid);
+}
+
+int32_t XRpcTransportConcurrentClient::send_post(const std::string& data)
+{
+  int32_t cseqid = this->sync_.generateSeqId();
+  ::apache::thrift::async::TConcurrentSendSentry sentry(&this->sync_);
+  oprot_->writeMessageBegin("post", ::apache::thrift::protocol::T_CALL, cseqid);
+
+  XRpcTransport_post_pargs args;
+  args.data = &data;
+  args.write(oprot_);
+
+  oprot_->writeMessageEnd();
+  oprot_->getTransport()->writeEnd();
+  oprot_->getTransport()->flush();
+
+  sentry.commit();
+  return cseqid;
+}
+
+int16_t XRpcTransportConcurrentClient::recv_post(const int32_t seqid)
+{
+
+  int32_t rseqid = 0;
+  std::string fname;
+  ::apache::thrift::protocol::TMessageType mtype;
+
+  // the read mutex gets dropped and reacquired as part of waitForWork()
+  // The destructor of this sentry wakes up other clients
+  ::apache::thrift::async::TConcurrentRecvSentry sentry(&this->sync_, seqid);
+
+  while(true) {
+    if(!this->sync_.getPending(fname, mtype, rseqid)) {
+      iprot_->readMessageBegin(fname, mtype, rseqid);
+    }
+    if(seqid == rseqid) {
+      if (mtype == ::apache::thrift::protocol::T_EXCEPTION) {
+        ::apache::thrift::TApplicationException x;
+        x.read(iprot_);
+        iprot_->readMessageEnd();
+        iprot_->getTransport()->readEnd();
+        sentry.commit();
+        throw x;
+      }
+      if (mtype != ::apache::thrift::protocol::T_REPLY) {
+        iprot_->skip(::apache::thrift::protocol::T_STRUCT);
+        iprot_->readMessageEnd();
+        iprot_->getTransport()->readEnd();
+      }
+      if (fname.compare("post") != 0) {
+        iprot_->skip(::apache::thrift::protocol::T_STRUCT);
+        iprot_->readMessageEnd();
+        iprot_->getTransport()->readEnd();
+
+        // in a bad state, don't commit
+        using ::apache::thrift::protocol::TProtocolException;
+        throw TProtocolException(TProtocolException::INVALID_DATA);
+      }
+      int16_t _return;
+      XRpcTransport_post_presult result;
+      result.success = &_return;
+      result.read(iprot_);
+      iprot_->readMessageEnd();
+      iprot_->getTransport()->readEnd();
+
+      if (result.__isset.success) {
+        sentry.commit();
+        return _return;
+      }
+      // in a bad state, don't commit
+      throw ::apache::thrift::TApplicationException(::apache::thrift::TApplicationException::MISSING_RESULT, "post failed: unknown result");
+    }
+    // seqid != rseqid
+    this->sync_.updatePending(fname, mtype, rseqid);
+
+    // this will temporarily unlock the readMutex, and let other clients get work done
+    this->sync_.waitForWork(seqid);
+  } // end while(true)
+}
+
+}}} // namespace
+
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/XRpcTransport.h b/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/XRpcTransport.h
new file mode 100755
index 0000000..124702e
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/XRpcTransport.h
@@ -0,0 +1,296 @@
+/**
+ * Autogenerated by Thrift Compiler (0.12.0)
+ *
+ * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+ *  @generated
+ */
+#ifndef XRpcTransport_H
+#define XRpcTransport_H
+
+#include <thrift/TDispatchProcessor.h>
+#include <thrift/async/TConcurrentClientSyncInfo.h>
+#include "rpc_types.h"
+
+namespace vagt { namespace transport { namespace rpc {
+
+#ifdef _MSC_VER
+  #pragma warning( push )
+  #pragma warning (disable : 4250 ) //inheriting methods via dominance 
+#endif
+
+class XRpcTransportIf {
+ public:
+  virtual ~XRpcTransportIf() {}
+  virtual int16_t post(const std::string& data) = 0;
+};
+
+class XRpcTransportIfFactory {
+ public:
+  typedef XRpcTransportIf Handler;
+
+  virtual ~XRpcTransportIfFactory() {}
+
+  virtual XRpcTransportIf* getHandler(const ::apache::thrift::TConnectionInfo& connInfo) = 0;
+  virtual void releaseHandler(XRpcTransportIf* /* handler */) = 0;
+};
+
+class XRpcTransportIfSingletonFactory : virtual public XRpcTransportIfFactory {
+ public:
+  XRpcTransportIfSingletonFactory(const ::apache::thrift::stdcxx::shared_ptr<XRpcTransportIf>& iface) : iface_(iface) {}
+  virtual ~XRpcTransportIfSingletonFactory() {}
+
+  virtual XRpcTransportIf* getHandler(const ::apache::thrift::TConnectionInfo&) {
+    return iface_.get();
+  }
+  virtual void releaseHandler(XRpcTransportIf* /* handler */) {}
+
+ protected:
+  ::apache::thrift::stdcxx::shared_ptr<XRpcTransportIf> iface_;
+};
+
+class XRpcTransportNull : virtual public XRpcTransportIf {
+ public:
+  virtual ~XRpcTransportNull() {}
+  int16_t post(const std::string& /* data */) {
+    int16_t _return = 0;
+    return _return;
+  }
+};
+
+typedef struct _XRpcTransport_post_args__isset {
+  _XRpcTransport_post_args__isset() : data(false) {}
+  bool data :1;
+} _XRpcTransport_post_args__isset;
+
+class XRpcTransport_post_args {
+ public:
+
+  XRpcTransport_post_args(const XRpcTransport_post_args&);
+  XRpcTransport_post_args& operator=(const XRpcTransport_post_args&);
+  XRpcTransport_post_args() : data() {
+  }
+
+  virtual ~XRpcTransport_post_args() throw();
+  std::string data;
+
+  _XRpcTransport_post_args__isset __isset;
+
+  void __set_data(const std::string& val);
+
+  bool operator == (const XRpcTransport_post_args & rhs) const
+  {
+    if (!(data == rhs.data))
+      return false;
+    return true;
+  }
+  bool operator != (const XRpcTransport_post_args &rhs) const {
+    return !(*this == rhs);
+  }
+
+  bool operator < (const XRpcTransport_post_args & ) const;
+
+  uint32_t read(::apache::thrift::protocol::TProtocol* iprot);
+  uint32_t write(::apache::thrift::protocol::TProtocol* oprot) const;
+
+};
+
+
+class XRpcTransport_post_pargs {
+ public:
+
+
+  virtual ~XRpcTransport_post_pargs() throw();
+  const std::string* data;
+
+  uint32_t write(::apache::thrift::protocol::TProtocol* oprot) const;
+
+};
+
+typedef struct _XRpcTransport_post_result__isset {
+  _XRpcTransport_post_result__isset() : success(false) {}
+  bool success :1;
+} _XRpcTransport_post_result__isset;
+
+class XRpcTransport_post_result {
+ public:
+
+  XRpcTransport_post_result(const XRpcTransport_post_result&);
+  XRpcTransport_post_result& operator=(const XRpcTransport_post_result&);
+  XRpcTransport_post_result() : success(0) {
+  }
+
+  virtual ~XRpcTransport_post_result() throw();
+  int16_t success;
+
+  _XRpcTransport_post_result__isset __isset;
+
+  void __set_success(const int16_t val);
+
+  bool operator == (const XRpcTransport_post_result & rhs) const
+  {
+    if (!(success == rhs.success))
+      return false;
+    return true;
+  }
+  bool operator != (const XRpcTransport_post_result &rhs) const {
+    return !(*this == rhs);
+  }
+
+  bool operator < (const XRpcTransport_post_result & ) const;
+
+  uint32_t read(::apache::thrift::protocol::TProtocol* iprot);
+  uint32_t write(::apache::thrift::protocol::TProtocol* oprot) const;
+
+};
+
+typedef struct _XRpcTransport_post_presult__isset {
+  _XRpcTransport_post_presult__isset() : success(false) {}
+  bool success :1;
+} _XRpcTransport_post_presult__isset;
+
+class XRpcTransport_post_presult {
+ public:
+
+
+  virtual ~XRpcTransport_post_presult() throw();
+  int16_t* success;
+
+  _XRpcTransport_post_presult__isset __isset;
+
+  uint32_t read(::apache::thrift::protocol::TProtocol* iprot);
+
+};
+
+class XRpcTransportClient : virtual public XRpcTransportIf {
+ public:
+  XRpcTransportClient(apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> prot) {
+    setProtocol(prot);
+  }
+  XRpcTransportClient(apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> iprot, apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> oprot) {
+    setProtocol(iprot,oprot);
+  }
+ private:
+  void setProtocol(apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> prot) {
+  setProtocol(prot,prot);
+  }
+  void setProtocol(apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> iprot, apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> oprot) {
+    piprot_=iprot;
+    poprot_=oprot;
+    iprot_ = iprot.get();
+    oprot_ = oprot.get();
+  }
+ public:
+  apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> getInputProtocol() {
+    return piprot_;
+  }
+  apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> getOutputProtocol() {
+    return poprot_;
+  }
+  int16_t post(const std::string& data);
+  void send_post(const std::string& data);
+  int16_t recv_post();
+ protected:
+  apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> piprot_;
+  apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> poprot_;
+  ::apache::thrift::protocol::TProtocol* iprot_;
+  ::apache::thrift::protocol::TProtocol* oprot_;
+};
+
+class XRpcTransportProcessor : public ::apache::thrift::TDispatchProcessor {
+ protected:
+  ::apache::thrift::stdcxx::shared_ptr<XRpcTransportIf> iface_;
+  virtual bool dispatchCall(::apache::thrift::protocol::TProtocol* iprot, ::apache::thrift::protocol::TProtocol* oprot, const std::string& fname, int32_t seqid, void* callContext);
+ private:
+  typedef  void (XRpcTransportProcessor::*ProcessFunction)(int32_t, ::apache::thrift::protocol::TProtocol*, ::apache::thrift::protocol::TProtocol*, void*);
+  typedef std::map<std::string, ProcessFunction> ProcessMap;
+  ProcessMap processMap_;
+  void process_post(int32_t seqid, ::apache::thrift::protocol::TProtocol* iprot, ::apache::thrift::protocol::TProtocol* oprot, void* callContext);
+ public:
+  XRpcTransportProcessor(::apache::thrift::stdcxx::shared_ptr<XRpcTransportIf> iface) :
+    iface_(iface) {
+    processMap_["post"] = &XRpcTransportProcessor::process_post;
+  }
+
+  virtual ~XRpcTransportProcessor() {}
+};
+
+class XRpcTransportProcessorFactory : public ::apache::thrift::TProcessorFactory {
+ public:
+  XRpcTransportProcessorFactory(const ::apache::thrift::stdcxx::shared_ptr< XRpcTransportIfFactory >& handlerFactory) :
+      handlerFactory_(handlerFactory) {}
+
+  ::apache::thrift::stdcxx::shared_ptr< ::apache::thrift::TProcessor > getProcessor(const ::apache::thrift::TConnectionInfo& connInfo);
+
+ protected:
+  ::apache::thrift::stdcxx::shared_ptr< XRpcTransportIfFactory > handlerFactory_;
+};
+
+class XRpcTransportMultiface : virtual public XRpcTransportIf {
+ public:
+  XRpcTransportMultiface(std::vector<apache::thrift::stdcxx::shared_ptr<XRpcTransportIf> >& ifaces) : ifaces_(ifaces) {
+  }
+  virtual ~XRpcTransportMultiface() {}
+ protected:
+  std::vector<apache::thrift::stdcxx::shared_ptr<XRpcTransportIf> > ifaces_;
+  XRpcTransportMultiface() {}
+  void add(::apache::thrift::stdcxx::shared_ptr<XRpcTransportIf> iface) {
+    ifaces_.push_back(iface);
+  }
+ public:
+  int16_t post(const std::string& data) {
+    size_t sz = ifaces_.size();
+    size_t i = 0;
+    for (; i < (sz - 1); ++i) {
+      ifaces_[i]->post(data);
+    }
+    return ifaces_[i]->post(data);
+  }
+
+};
+
+// The 'concurrent' client is a thread safe client that correctly handles
+// out of order responses.  It is slower than the regular client, so should
+// only be used when you need to share a connection among multiple threads
+class XRpcTransportConcurrentClient : virtual public XRpcTransportIf {
+ public:
+  XRpcTransportConcurrentClient(apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> prot) {
+    setProtocol(prot);
+  }
+  XRpcTransportConcurrentClient(apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> iprot, apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> oprot) {
+    setProtocol(iprot,oprot);
+  }
+ private:
+  void setProtocol(apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> prot) {
+  setProtocol(prot,prot);
+  }
+  void setProtocol(apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> iprot, apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> oprot) {
+    piprot_=iprot;
+    poprot_=oprot;
+    iprot_ = iprot.get();
+    oprot_ = oprot.get();
+  }
+ public:
+  apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> getInputProtocol() {
+    return piprot_;
+  }
+  apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> getOutputProtocol() {
+    return poprot_;
+  }
+  int16_t post(const std::string& data);
+  int32_t send_post(const std::string& data);
+  int16_t recv_post(const int32_t seqid);
+ protected:
+  apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> piprot_;
+  apache::thrift::stdcxx::shared_ptr< ::apache::thrift::protocol::TProtocol> poprot_;
+  ::apache::thrift::protocol::TProtocol* iprot_;
+  ::apache::thrift::protocol::TProtocol* oprot_;
+  ::apache::thrift::async::TConcurrentClientSyncInfo sync_;
+};
+
+#ifdef _MSC_VER
+  #pragma warning( pop )
+#endif
+
+}}} // namespace
+
+#endif
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/rpc_constants.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/rpc_constants.cpp
new file mode 100755
index 0000000..8fa4367
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/rpc_constants.cpp
@@ -0,0 +1,17 @@
+/**
+ * Autogenerated by Thrift Compiler (0.12.0)
+ *
+ * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+ *  @generated
+ */
+#include "rpc_constants.h"
+
+namespace vagt { namespace transport { namespace rpc {
+
+const rpcConstants g_rpc_constants;
+
+rpcConstants::rpcConstants() {
+}
+
+}}} // namespace
+
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/rpc_constants.h b/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/rpc_constants.h
new file mode 100755
index 0000000..56fde2a
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/rpc_constants.h
@@ -0,0 +1,24 @@
+/**
+ * Autogenerated by Thrift Compiler (0.12.0)
+ *
+ * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+ *  @generated
+ */
+#ifndef rpc_CONSTANTS_H
+#define rpc_CONSTANTS_H
+
+#include "rpc_types.h"
+
+namespace vagt { namespace transport { namespace rpc {
+
+class rpcConstants {
+ public:
+  rpcConstants();
+
+};
+
+extern const rpcConstants g_rpc_constants;
+
+}}} // namespace
+
+#endif
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/rpc_types.cpp b/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/rpc_types.cpp
new file mode 100755
index 0000000..02a866e
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/rpc_types.cpp
@@ -0,0 +1,16 @@
+/**
+ * Autogenerated by Thrift Compiler (0.12.0)
+ *
+ * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+ *  @generated
+ */
+#include "rpc_types.h"
+
+#include <algorithm>
+#include <ostream>
+
+#include <thrift/TToString.h>
+
+namespace vagt { namespace transport { namespace rpc {
+
+}}} // namespace
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/rpc_types.h b/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/rpc_types.h
new file mode 100755
index 0000000..7ace455
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/gen-cpp/rpc_types.h
@@ -0,0 +1,25 @@
+/**
+ * Autogenerated by Thrift Compiler (0.12.0)
+ *
+ * DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
+ *  @generated
+ */
+#ifndef rpc_TYPES_H
+#define rpc_TYPES_H
+
+#include <iosfwd>
+
+#include <thrift/Thrift.h>
+#include <thrift/TApplicationException.h>
+#include <thrift/TBase.h>
+#include <thrift/protocol/TProtocol.h>
+#include <thrift/transport/TTransport.h>
+
+#include <thrift/stdcxx.h>
+
+
+namespace vagt { namespace transport { namespace rpc {
+
+}}} // namespace
+
+#endif
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/include/XQueue.h b/veslibrary/ves_cpplibrary/src/lib/transport/include/XQueue.h
new file mode 100755
index 0000000..c2a08b6
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/include/XQueue.h
@@ -0,0 +1,40 @@
+#pragma once
+
+#include <string>
+#include <memory>
+
+namespace vagt
+{
+    namespace queue
+    {
+        /*************************************************************************************************//**
+        * @brief Error codes
+        *****************************************************************************************************/
+        enum XErrorCode : unsigned short
+        {
+            XErrorOk,       /**< The operation is successful */
+            XErrorNok,      /**< General failure */
+            XErrorFull,     /**< The buffer is full */
+            XErrorEmpty,    /**< The buffer is empty */
+        };
+
+        class XQueue
+        {
+        public:
+            virtual bool empty() = 0;
+            virtual XErrorCode push(const std::string& val) = 0;
+            virtual void pop() = 0;
+            virtual std::string front() = 0;
+
+            /*************************************************************************************************//**
+            *    Create a queue in memory with specified capacity.
+            *****************************************************************************************************/
+            static std::shared_ptr<XQueue> create(int capacity);
+
+            /*************************************************************************************************//**
+            *    Create a queue on disk.
+            *****************************************************************************************************/
+            static std::shared_ptr<XQueue> create(const std::string& path);
+        };
+    }
+}
+\ No newline at end of file
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/include/XTransport.h b/veslibrary/ves_cpplibrary/src/lib/transport/include/XTransport.h
new file mode 100755
index 0000000..9416cf4
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/include/XTransport.h
@@ -0,0 +1,151 @@
+#pragma once
+/*************************************************************************************************//**
+@file     XTransport.h
+@brief    Transport API, used to send string to collector
+*****************************************************************************************************/
+#include <memory>
+#include <atomic>
+#include <string>
+#include <vector>
+#include <chrono>
+#include "XQueue.h"
+
+namespace vagt 
+{
+    namespace transport
+    {
+        /*************************************************************************************************//**
+        * @brief Error codes
+        *****************************************************************************************************/
+        enum XErrorCode: unsigned short
+        {
+            XErrorOk,                /**< The operation is successful  */
+            XErrorNok,               /**< General failure */  
+            XErrorTimeout,           /**< Timeout */  
+            XErrorUnauthorized,      /**< Unauthorized */
+            XErrorCanceled,          /**< The operation is canceled */
+            XErrorClientError,       /**< Client error, e.g. HTTP 404 */  
+            XErrorServerError,       /**< Server error, e.g. HTTP 500 */  
+            XErrorNetworkError,      /**< Network error */  
+        };
+
+        /*************************************************************************************************//**
+        * @brief Transport option
+        *****************************************************************************************************/
+        class XTransportOption
+        {
+        public:
+            std::string host_;                          /**< Remote RPC server hostname or IP address*/
+            int port_;                                  /**< Remote RPC server port */
+            std::chrono::milliseconds timeOut_;         /**< Timeout */
+            std::string url_;                           /**< URL of Collector */
+            std::string sourceIp_;                      /**< Source IP Address */
+            bool secure_;                               /**< Enable TLS or not */
+            std::string caInfo_;                        /**< CA INFO for TLS */
+            std::string caFilePath_;                    /**< CA pATH for TLS */
+            std::string certFilePath_;                  /**< CERT for TLS */
+            std::string keyFilePath_;                   /**< KEY for TLS */
+            long verifyPeer_;                           /**< Refer to CURLOPT_SSL_VERIFYPEER */
+            long verifyHost_;                           /**< Refer to CURLOPT_SSL_VERIFYHOST */
+            std::string userName_;                      /**< User name */
+            std::string userPasswd_;                    /**< Password */
+
+            XTransportOption():secure_(false),verifyPeer_(1),verifyHost_(2)
+            {}
+        };
+
+        /*************************************************************************************************//**
+        * @brief Transport interface
+        *****************************************************************************************************/
+        class XTransport
+        {
+        public:
+            XTransport();
+
+            /*************************************************************************************************//**
+            *    Start Transport and the decorated transports.
+            *
+            *    @note           This method will call allowPost().
+            *****************************************************************************************************/
+            virtual XErrorCode start() = 0;
+
+            /*************************************************************************************************//**
+            *    Stop Transport and the decorated transports.
+            *
+            *    @note           This method will call cancelPost().
+            *****************************************************************************************************/
+            virtual XErrorCode stop() = 0;
+
+            /*************************************************************************************************//**
+            *    Post event string.
+            *****************************************************************************************************/
+            virtual XErrorCode post(const std::string& event) = 0;
+
+            /*************************************************************************************************//**
+            *    Cancel the running and subsequent post() until allowPost() is called.
+            *    It is useful especially when transport is wrapped by SynchronizedTransport.
+            *****************************************************************************************************/
+            virtual void cancelPost();
+
+            /*************************************************************************************************//**
+            *    Allow the post() method. 
+            *****************************************************************************************************/
+            virtual void allowPost();
+
+            /*************************************************************************************************//**
+            *    Check if the post() method will be canceled. 
+            *****************************************************************************************************/
+            virtual bool shouldCancelPost();
+ 
+            /*************************************************************************************************//**
+            *    Create a libcurl based transport.
+            *****************************************************************************************************/
+            static std::shared_ptr<XTransport> LibCurlTransport(const XTransportOption& option);
+
+            /*************************************************************************************************//**
+            *    Create a retry transport decorator. 
+            *    The retry will be performed if the decorated post() does NOT return 
+            *    XErrorOk, XErrorCanceled or XErrorClientError.
+            *****************************************************************************************************/
+            static std::shared_ptr<XTransport> RetryTransport(std::shared_ptr<XTransport> transport,
+                std::chrono::milliseconds retryInterval, 
+                int retryTimes);
+
+            /*************************************************************************************************//**
+            *    Create a switchable transport decorator.
+            *    The transport will be switched if the decorated post() does NOT return 
+            *    XErrorOk, XErrorCanceled or XErrorClientError.
+            *****************************************************************************************************/
+            static std::shared_ptr<XTransport> SwitchableTransport(std::vector<std::shared_ptr<XTransport>>& transports);
+
+            /*************************************************************************************************//**
+            *    Create a synchronized transport decorator. 
+            *    The decorated transport will be thread safe.
+            *****************************************************************************************************/
+            static std::shared_ptr<XTransport> SynchronizedTransport(std::shared_ptr<XTransport> transport);
+
+            /*************************************************************************************************//**
+            *    Create a bufferd(FIFO) transport decorator. 
+            *    The event string will be buffered first and then post via decorated transport.
+            *****************************************************************************************************/
+            static std::shared_ptr<XTransport> BufferedTransport(std::shared_ptr<XTransport> transport, std::shared_ptr<vagt::queue::XQueue> queue);
+
+            /*************************************************************************************************//**
+            *    Create a RPC client transport. 
+            *****************************************************************************************************/
+            static std::shared_ptr<XTransport> RpcClientTransport(const XTransportOption& option);
+
+            /*************************************************************************************************//**
+            *    Create a RPC server transport. 
+            *****************************************************************************************************/
+            static std::shared_ptr<XTransport> RpcServerTransport(std::shared_ptr<XTransport> transport, const XTransportOption& option);
+
+        protected:
+           std::atomic<bool> cancel_;
+
+        private:
+            XTransport(const XTransport&) = delete;
+            XTransport& operator=(const XTransport&) = delete;
+        };
+    }
+}
diff --git a/veslibrary/ves_cpplibrary/src/lib/transport/rpc.idl b/veslibrary/ves_cpplibrary/src/lib/transport/rpc.idl
new file mode 100755
index 0000000..de4979b
--- /dev/null
+++ b/veslibrary/ves_cpplibrary/src/lib/transport/rpc.idl
@@ -0,0 +1,6 @@
+namespace cpp vagt.transport.rpc
+                                                                 
+service XRpcTransport
+{                                                                
+    i16 post(1: string data)                  
+}                                                                
+\ No newline at end of file