Implement batching of VES events

Issue-ID: CERT-6
Change-Id: Ie2ba74075539e6896b1c1bd580cf0a80414a04a1
Signed-off-by: Gokul Singaraju <goksing@gmail.com>

10 files changed, 445 insertions, 77 deletions

diff --git a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel.c b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel.c
index dbaf58ad..246ed5de 100644
--- a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel.c
+++ b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel.c
@@ -388,6 +388,13 @@ void evel_free_event(void * event)
       free(evt_ptr);
       break;
 
+    case EVEL_DOMAIN_BATCH:
+      EVEL_DEBUG("Event is a Batch at %lp", evt_ptr);
+      evel_free_batch((EVENT_HEADER *)evt_ptr);
+      memset(evt_ptr, 0, sizeof(EVENT_HEADER));
+      free(evt_ptr);
+      break;
+
     default:
       EVEL_ERROR("Unexpected event domain (%d)", evt_ptr->event_domain);
       assert(0);
diff --git a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel.h b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel.h
index 0ae1713e..6b7a8720 100644
--- a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel.h
+++ b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel.h
@@ -1,5 +1,3 @@
-#ifndef EVEL_INCLUDED
-#define EVEL_INCLUDED
 /*************************************************************************//**
  *
  * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
@@ -29,6 +27,9 @@
  * be one of ::EVEL_ERR_CODES.
  *****************************************************************************/
 
+#ifndef EVEL_INCLUDED
+#define EVEL_INCLUDED
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -86,7 +87,7 @@ typedef enum {
 /* Maximum string lengths.                                                   */
 /*****************************************************************************/
 #define EVEL_MAX_STRING_LEN          4096
-#define EVEL_MAX_JSON_BODY           16000
+#define EVEL_MAX_JSON_BODY           160000
 #define EVEL_MAX_ERROR_STRING_LEN    255
 #define EVEL_MAX_URL_LEN             511
 
@@ -117,6 +118,7 @@ static const int EVEL_EVENT_BUFFER_DEPTH = 100;
  *****************************************************************************/
 typedef enum {
   EVEL_DOMAIN_INTERNAL,       /** Internal event, not for external routing.  */
+  EVEL_DOMAIN_BATCH,          /** Batch event, composite event.              */
   EVEL_DOMAIN_HEARTBEAT,      /** A Heartbeat event (event header only).     */
   EVEL_DOMAIN_FAULT,          /** A Fault event.                             */
   EVEL_DOMAIN_MEASUREMENT,    /** A Measurement for VF Scaling event.        */
@@ -400,9 +402,11 @@ typedef struct internal_header_fields
 /*****************************************************************************/
 /* Supported Common Event Header version.                                    */
 /*****************************************************************************/
-#define EVEL_HEADER_MAJOR_VERSION 1
-#define EVEL_HEADER_MINOR_VERSION 2
+#define EVEL_HEADER_MAJOR_VERSION 3
+#define EVEL_HEADER_MINOR_VERSION 0
 
+#define EVEL_BATCH_MAJOR_VERSION 1
+#define EVEL_BATCH_MINOR_VERSION 0
 /**************************************************************************//**
  * Event header.
  * JSON equivalent field: commonEventHeader
@@ -436,9 +440,57 @@ typedef struct event_header {
   EVEL_OPTION_INTHEADER_FIELDS internal_field;
   EVEL_OPTION_STRING nfcnaming_code;
   EVEL_OPTION_STRING nfnaming_code;
+  DLIST batch_events;
 
 } EVENT_HEADER;
 
+/**************************************************************************//**
+ * Initialize a newly created event header.
+ *
+ * @param header  Pointer to the header being initialized.
+ * @param eventname Eventname string
+ * @param eventid   Event id : unique id for classification and analysis
+ * @param header  Pointer to the header being initialized.
+ *****************************************************************************/
+void evel_init_header_nameid(EVENT_HEADER * const header,const char *const eventname, const char *eventid);
+
+/**************************************************************************//**
+ * Create a new Batch event.
+ *
+ * @note    The mandatory fields on the Batch must be supplied to this factory
+ *          function and are immutable once set.  Optional fields have explicit
+ *          setter functions, but again values may only be set once so that the
+ *          Batch has immutable properties. At this time evename and eventid
+ *          for batch events are set but not used in json encoding
+ * @returns pointer to the newly manufactured ::EVENT_HEADER.  If the event is
+ *          not used (i.e. posted) it must be released using ::evel_free_batch.
+ * @retval  NULL  Failed to create the event.
+ *****************************************************************************/
+EVENT_HEADER * evel_new_batch(const char* ev_name, const char *ev_id);
+
+
+/**************************************************************************//**
+ * Add an Event into Batch Event
+ *
+ * The name and value are null delimited ASCII strings.  The library takes
+ * a copy so the caller does not have to preserve values after the function
+ * returns.
+ *
+ * @param other     Pointer to the Batch Event.
+ * @param jsonobj   Pointer to  additional Event
+ *****************************************************************************/
+void evel_batch_add_event(EVENT_HEADER * batchev, EVENT_HEADER *child);
+
+/**************************************************************************//**
+ * Free an Batch.
+ *
+ * Free off the Batch supplied.  Will free all the contained allocated memory.
+ *
+ * @note It does not free the Batch itself, since that may be part of a
+ * larger structure.
+ *****************************************************************************/
+void evel_free_batch(EVENT_HEADER * event);
+
 /*****************************************************************************/
 /* Supported Fault version.                                                  */
 /*****************************************************************************/
@@ -1082,8 +1134,8 @@ typedef struct mobile_gtp_per_flow_metrics {
 /*****************************************************************************/
 /* Supported Mobile Flow version.                                            */
 /*****************************************************************************/
-#define EVEL_MOBILE_FLOW_MAJOR_VERSION 1
-#define EVEL_MOBILE_FLOW_MINOR_VERSION 2
+#define EVEL_MOBILE_FLOW_MAJOR_VERSION 2
+#define EVEL_MOBILE_FLOW_MINOR_VERSION 0
 
 /**************************************************************************//**
  * Mobile Flow.
@@ -1179,8 +1231,8 @@ typedef struct other_field {
 /*****************************************************************************/
 /* Supported Signaling version.                                              */
 /*****************************************************************************/
-#define EVEL_SIGNALING_MAJOR_VERSION 2
-#define EVEL_SIGNALING_MINOR_VERSION 1
+#define EVEL_SIGNALING_MAJOR_VERSION 1
+#define EVEL_SIGNALING_MINOR_VERSION 0
 
 /**************************************************************************//**
  * Vendor VNF Name fields.
@@ -1277,8 +1329,8 @@ typedef struct state_change_additional_field {
 /*****************************************************************************/
 /* Supported Syslog version.                                                 */
 /*****************************************************************************/
-#define EVEL_SYSLOG_MAJOR_VERSION 1
-#define EVEL_SYSLOG_MINOR_VERSION 2
+#define EVEL_SYSLOG_MAJOR_VERSION 3
+#define EVEL_SYSLOG_MINOR_VERSION 0
 
 /**************************************************************************//**
  * Syslog.
@@ -1400,6 +1452,7 @@ void evel_free_event(void * event);
  * Encode the event as a JSON event object according to AT&T's schema.
  *
  * @param json      Pointer to where to store the JSON encoded data.
+ * @param mode      Event mode or Batch mode
  * @param max_size  Size of storage available in json_body.
  * @param event     Pointer to the ::EVENT_HEADER to encode.
  * @returns Number of bytes actually written.
@@ -1407,7 +1460,9 @@ void evel_free_event(void * event);
 int evel_json_encode_event(char * json,
                            int max_size,
                            EVENT_HEADER * event);
-
+int evel_json_encode_batch_event(char * json,
+                           int max_size,
+                           EVENT_HEADER * event);
 /**************************************************************************//**
  * Initialize an event instance id.
  *
@@ -1490,8 +1545,8 @@ EVENT_HEADER * evel_new_heartbeat(void);
  *
  * @note that the heartbeat is just a "naked" commonEventHeader!
  *
- * @param event_name  Unique Event Name confirming Domain AsdcModel Description
- * @param event_id    A universal identifier of the event for: troubleshooting correlation, analysis, etc
+ * @param event_name    Unique Event Name: {DomainAbbreviation}_{AsdcModel or ApplicationPlatform}_{DescriptionOfInfoBeingConveyed}
+ * @param event_id    A universal identifier of the event for: troubleshooting, cross-referencing of alarms for alarm correlation, offline log analysis, etc
  *
  * @returns pointer to the newly manufactured ::EVENT_HEADER.  If the event is
  *          not used it must be released using ::evel_free_event
@@ -4255,8 +4310,8 @@ typedef struct perf_counter {
 /*****************************************************************************/
 /* Supported Threshold Crossing version.                                     */
 /*****************************************************************************/
-#define EVEL_THRESHOLD_CROSS_MAJOR_VERSION 1
-#define EVEL_THRESHOLD_CROSS_MINOR_VERSION 1
+#define EVEL_THRESHOLD_CROSS_MAJOR_VERSION 2
+#define EVEL_THRESHOLD_CROSS_MINOR_VERSION 0
 
 /**************************************************************************//**
  * Threshold Crossing.
diff --git a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_batch.c b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_batch.c
new file mode 100644
index 00000000..a33e5e12
--- /dev/null
+++ b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_batch.c
@@ -0,0 +1,150 @@
+/*************************************************************************//**
+ *
+ * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ *
+ * Unless otherwise specified, all software contained herein is
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and 
+ * limitations under the License.
+ *
+ ****************************************************************************/
+
+/**************************************************************************//**
+ * @file
+ * Source module implementing EVEL Batch API.
+ *
+ * This file implements the EVEL Batch API which is intended to provide a
+ * simple wrapper around packaging multiple EVEL messages into single HTTP(S) package
+ * This is implemented per VES 5.3 standards. Currently max size of package is 160K
+ *
+ ****************************************************************************/
+
+#include <string.h>
+#include <assert.h>
+#include <stdlib.h>
+
+#include "evel.h"
+#include "evel_internal.h"
+
+/**************************************************************************//**
+ * Create a new empty Batch event.
+ *
+ * @note    The mandatory fields on the Batch must be supplied to this factory
+ *          function and are immutable once set.  Optional fields have explicit
+ *          setter functions, but again values may only be set once so that the
+ *          Batch has immutable properties.
+ * @params  Event name and Event id are dummy strings. Not encoded into JSON
+ * @returns pointer to the newly manufactured ::EVENT_HEADER.  If the event is
+ *          not used (i.e. posted) it must be released using ::evel_free_batch.
+ * @retval  NULL  Failed to create the event.
+ *****************************************************************************/
+EVENT_HEADER * evel_new_batch(const char* ev_name, const char *ev_id)
+{
+  EVENT_HEADER * other = NULL;
+  EVEL_ENTER();
+
+  /***************************************************************************/
+  /* Check preconditions.                                                    */
+  /***************************************************************************/
+
+  /***************************************************************************/
+  /* Allocate the Batch.                                                     */
+  /***************************************************************************/
+  other = malloc(sizeof(EVENT_HEADER));
+  if (other == NULL)
+  {
+    log_error_state("Out of memory");
+    goto exit_label;
+  }
+  memset(other, 0, sizeof(EVENT_HEADER));
+  EVEL_DEBUG("New Batch is at %lp", other);
+
+  /***************************************************************************/
+  /* Initialize the header & the Batch fields.  Optional string values are   */
+  /* uninitialized (NULL).                                                   */
+  /***************************************************************************/
+  evel_init_header_nameid(other,ev_name,ev_id);
+  other->event_domain = EVEL_DOMAIN_BATCH;
+  other->major_version = EVEL_BATCH_MAJOR_VERSION;
+  other->minor_version = EVEL_BATCH_MINOR_VERSION;
+
+  dlist_initialize(&other->batch_events);
+
+exit_label:
+  EVEL_EXIT();
+  return other;
+}
+
+
+/**************************************************************************//**
+ * Add an additional VES Message into Batch Event
+ *
+ * The function may be called as many times without reaching 160K max json size
+ * limit.
+ * The max limit is only checked at encoding time and error generated
+ *
+ * @param batchev     Pointer to  already created new Batch Event.
+ * @param child       Pointer to  additional VES Event
+ *****************************************************************************/
+void evel_batch_add_event(EVENT_HEADER * batchev, EVENT_HEADER *child)
+{
+  EVEL_ENTER();
+
+  /***************************************************************************/
+  /* Check preconditions.                                                    */
+  /***************************************************************************/
+  assert(batchev != NULL);
+  assert(batchev->event_domain == EVEL_DOMAIN_BATCH);
+  assert(child != NULL);
+
+  EVEL_DEBUG("Adding Batch event");
+
+  dlist_push_last(&batchev->batch_events, child);
+
+  EVEL_EXIT();
+}
+
+
+/**************************************************************************//**
+ * Free a Batch Event.
+ *
+ * Free off the Batch supplied.  Will free all the contained VES message memory.
+ *
+ * @note It does not free the Batch itself, since that may be part of a
+ * larger structure.
+ *****************************************************************************/
+void evel_free_batch(EVENT_HEADER * event)
+{
+  EVENT_HEADER * batch_field = NULL;
+
+  EVEL_ENTER();
+
+  /***************************************************************************/
+  /* Check preconditions.  As an internal API we don't allow freeing NULL    */
+  /* events as we do on the public API.                                      */
+  /***************************************************************************/
+  assert(event != NULL);
+  assert(event->event_domain == EVEL_DOMAIN_BATCH);
+
+  /***************************************************************************/
+  /* Free all internal strings then the header itself.                       */
+  /***************************************************************************/
+  batch_field = dlist_pop_last(&event->batch_events);
+  while (batch_field != NULL)
+  {
+    EVEL_DEBUG("Freeing Batch Event (%s, %s)",
+               batch_field->event_name,
+               batch_field->event_id);
+    evel_free_event(batch_field);
+    batch_field = dlist_pop_last(&event->batch_events);
+  }
+
+  EVEL_EXIT();
+}
diff --git a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_event.c b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_event.c
index 4de49bcf..c9bb4345 100644
--- a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_event.c
+++ b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_event.c
@@ -183,6 +183,7 @@ void evel_init_header(EVENT_HEADER * const header,const char *const eventname)
   evel_force_option_string(&header->reporting_entity_id, openstack_vm_uuid());
   evel_force_option_string(&header->source_id, openstack_vm_uuid());
   evel_init_option_intheader(&header->internal_field);
+  dlist_initialize(&header->batch_events);
 
   EVEL_EXIT();
 }
@@ -192,6 +193,9 @@ void evel_init_header(EVENT_HEADER * const header,const char *const eventname)
  * Initialize a newly created event header.
  *
  * @param header  Pointer to the header being initialized.
+ * @param eventname Eventname string
+ * @param eventid   Event id : unique id for classification and analysis
+ * @param header  Pointer to the header being initialized.
  *****************************************************************************/
 void evel_init_header_nameid(EVENT_HEADER * const header,const char *const eventname, const char *eventid)
 {
@@ -232,6 +236,7 @@ void evel_init_header_nameid(EVENT_HEADER * const header,const char *const event
   evel_force_option_string(&header->reporting_entity_id, openstack_vm_uuid());
   evel_force_option_string(&header->source_id, openstack_vm_uuid());
   evel_init_option_intheader(&header->internal_field);
+  dlist_initialize(&header->batch_events);
 
   EVEL_EXIT();
 }
@@ -505,6 +510,78 @@ void evel_free_header(EVENT_HEADER * const event)
   EVEL_EXIT();
 }
 
+
+/**************************************************************************//**
+ * Encode the event as a JSON event object according to AT&T's schema.
+ *
+ * @param json      Pointer to where to store the JSON encoded data.
+ * @param max_size  Size of storage available in json_body.
+ * @param event     Pointer to the ::EVENT_HEADER to encode.
+ * @returns Number of bytes actually written.
+ *****************************************************************************/
+void evel_json_encode_eventtype(
+			   EVEL_JSON_BUFFER * jbuf,
+                           EVENT_HEADER * event)
+{
+      switch (event->event_domain)
+      {
+        case EVEL_DOMAIN_HEARTBEAT:
+          evel_json_encode_header(jbuf, event);
+          break;
+
+        case EVEL_DOMAIN_FAULT:
+          evel_json_encode_fault(jbuf, (EVENT_FAULT *)event);
+          break;
+
+        case EVEL_DOMAIN_MEASUREMENT:
+          evel_json_encode_measurement(jbuf, (EVENT_MEASUREMENT *)event);
+          break;
+
+        case EVEL_DOMAIN_MOBILE_FLOW:
+          evel_json_encode_mobile_flow(jbuf, (EVENT_MOBILE_FLOW *)event);
+          break;
+
+        case EVEL_DOMAIN_REPORT:
+          evel_json_encode_report(jbuf, (EVENT_REPORT *)event);
+          break;
+
+        case EVEL_DOMAIN_HEARTBEAT_FIELD:
+          evel_json_encode_hrtbt_field(jbuf, (EVENT_HEARTBEAT_FIELD *)event);
+          break;
+
+        case EVEL_DOMAIN_SIPSIGNALING:
+          evel_json_encode_signaling(jbuf, (EVENT_SIGNALING *)event);
+          break;
+
+        case EVEL_DOMAIN_STATE_CHANGE:
+          evel_json_encode_state_change(jbuf, (EVENT_STATE_CHANGE *)event);
+          break;
+
+        case EVEL_DOMAIN_SYSLOG:
+          evel_json_encode_syslog(jbuf, (EVENT_SYSLOG *)event);
+          break;
+
+        case EVEL_DOMAIN_OTHER:
+          evel_json_encode_other(jbuf, (EVENT_OTHER *)event);
+          break;
+
+        case EVEL_DOMAIN_VOICE_QUALITY:
+          evel_json_encode_voice_quality(jbuf, (EVENT_VOICE_QUALITY *)event);
+          break;
+
+        case EVEL_DOMAIN_THRESHOLD_CROSS:
+          evel_json_encode_threshold_cross(jbuf, (EVENT_THRESHOLD_CROSS *)event);
+          break;
+
+        case EVEL_DOMAIN_INTERNAL:
+        default:
+          EVEL_ERROR("Unexpected domain %d", event->event_domain);
+          assert(0);
+      }
+}
+
+
+
 /**************************************************************************//**
  * Encode the event as a JSON event object according to AT&T's schema.
  *
@@ -535,61 +612,7 @@ int evel_json_encode_event(char * json,
   evel_json_open_object(jbuf);
   evel_json_open_named_object(jbuf, "event");
 
-  switch (event->event_domain)
-  {
-    case EVEL_DOMAIN_HEARTBEAT:
-      evel_json_encode_header(jbuf, event);
-      break;
-
-    case EVEL_DOMAIN_FAULT:
-      evel_json_encode_fault(jbuf, (EVENT_FAULT *)event);
-      break;
-
-    case EVEL_DOMAIN_MEASUREMENT:
-      evel_json_encode_measurement(jbuf, (EVENT_MEASUREMENT *)event);
-      break;
-
-    case EVEL_DOMAIN_MOBILE_FLOW:
-      evel_json_encode_mobile_flow(jbuf, (EVENT_MOBILE_FLOW *)event);
-      break;
-
-    case EVEL_DOMAIN_REPORT:
-      evel_json_encode_report(jbuf, (EVENT_REPORT *)event);
-      break;
-
-    case EVEL_DOMAIN_HEARTBEAT_FIELD:
-      evel_json_encode_hrtbt_field(jbuf, (EVENT_HEARTBEAT_FIELD *)event);
-      break;
-
-    case EVEL_DOMAIN_SIPSIGNALING:
-      evel_json_encode_signaling(jbuf, (EVENT_SIGNALING *)event);
-      break;
-
-    case EVEL_DOMAIN_STATE_CHANGE:
-      evel_json_encode_state_change(jbuf, (EVENT_STATE_CHANGE *)event);
-      break;
-
-    case EVEL_DOMAIN_SYSLOG:
-      evel_json_encode_syslog(jbuf, (EVENT_SYSLOG *)event);
-      break;
-
-    case EVEL_DOMAIN_OTHER:
-      evel_json_encode_other(jbuf, (EVENT_OTHER *)event);
-      break;
-
-    case EVEL_DOMAIN_VOICE_QUALITY:
-      evel_json_encode_voice_quality(jbuf, (EVENT_VOICE_QUALITY *)event);
-      break;
-
-    case EVEL_DOMAIN_THRESHOLD_CROSS:
-      evel_json_encode_threshold_cross(jbuf, (EVENT_THRESHOLD_CROSS *)event);
-      break;
-
-    case EVEL_DOMAIN_INTERNAL:
-    default:
-      EVEL_ERROR("Unexpected domain %d", event->event_domain);
-      assert(0);
-  }
+  evel_json_encode_eventtype(jbuf, event);
 
   evel_json_close_object(jbuf);
   evel_json_close_object(jbuf);
@@ -603,6 +626,75 @@ int evel_json_encode_event(char * json,
 
   return jbuf->offset;
 }
+/**************************************************************************//**
+ * Encode the event as a JSON event object according to AT&T's schema.
+ *
+ * @param json      Pointer to where to store the JSON encoded data.
+ * @param max_size  Size of storage available in json_body.
+ * @param event     Pointer to the ::EVENT_HEADER to encode.
+ * @returns Number of bytes actually written.
+ *****************************************************************************/
+int evel_json_encode_batch_event(char * json,
+                           int max_size,
+                           EVENT_HEADER * event)
+{
+  EVEL_JSON_BUFFER json_buffer;
+  EVEL_JSON_BUFFER *jbuf = &json_buffer;
+  EVEL_THROTTLE_SPEC * throttle_spec;
+  int tot_size = 0;
+  EVENT_HEADER * batch_field = NULL;
+  DLIST_ITEM * batch_field_item = NULL;
+
+  EVEL_ENTER();
+
+  /***************************************************************************/
+  /* Get the latest throttle specification for the domain.                   */
+  /***************************************************************************/
+  throttle_spec = evel_get_throttle_spec(event->event_domain);
+
+  /***************************************************************************/
+  /* Initialize the JSON_BUFFER and open the top-level objects.              */
+  /***************************************************************************/
+  if (event->event_domain == EVEL_DOMAIN_BATCH){
+      evel_json_buffer_init(jbuf, json, max_size, throttle_spec);
+
+  if(dlist_count(&event->batch_events) > 0)
+  {
+    evel_json_open_object(jbuf);
+    evel_json_open_named_list(jbuf, "eventList");
+    batch_field_item = dlist_get_first(&event->batch_events);
+    while (batch_field_item != NULL)
+    {
+     batch_field = (EVENT_HEADER *) batch_field_item->item;
+     if(batch_field != NULL){
+       EVEL_DEBUG("Batch Event %p %p added curr fsize %d offset %d depth %d check %d", batch_field_item->item, batch_field, tot_size,jbuf->offset,jbuf->depth,jbuf->checkpoint);
+       evel_json_open_object(jbuf);
+       evel_json_encode_eventtype(jbuf, batch_field);
+       evel_json_close_object(jbuf);
+
+       tot_size += jbuf->offset;
+       EVEL_DEBUG("Batch Event result size %d offset %d depth %d check %d", tot_size,jbuf->offset,jbuf->depth,jbuf->checkpoint);
+       if( tot_size >= max_size ){
+          EVEL_ERROR("Batch Event exceeded size limit %d", tot_size);
+          assert(0);
+       }
+       batch_field_item = dlist_get_next(batch_field_item);
+     }
+    }
+    evel_json_close_list(jbuf);
+    evel_json_close_object(jbuf);
+  }
+
+  }
+  /***************************************************************************/
+  /* Sanity check.                                                           */
+  /***************************************************************************/
+  //assert(jbuf->depth == 0);
+
+  EVEL_EXIT();
+
+  return jbuf->offset;
+}
 
 
 /**************************************************************************//**
diff --git a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_event_mgr.c b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_event_mgr.c
index 572df148..9d3aa610 100644
--- a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_event_mgr.c
+++ b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_event_mgr.c
@@ -102,6 +102,7 @@ static EVT_HANDLER_STATE evt_handler_state = EVT_HANDLER_UNINITIALIZED;
  *****************************************************************************/
 static char * evel_event_api_url;
 static char * evel_throt_api_url;
+static char * evel_batch_api_url;
 
 /**************************************************************************//**
  * Initialize the event handler.
@@ -126,6 +127,7 @@ EVEL_ERR_CODES event_handler_initialize(const char * const event_api_url,
 {
   int rc = EVEL_SUCCESS;
   CURLcode curl_rc = CURLE_OK;
+  char batch_api_url[EVEL_MAX_URL_LEN + 1] = {0};
 
   EVEL_ENTER();
 
@@ -142,6 +144,9 @@ EVEL_ERR_CODES event_handler_initialize(const char * const event_api_url,
   /***************************************************************************/
   evel_event_api_url = strdup(event_api_url);
   assert(evel_event_api_url != NULL);
+  sprintf(batch_api_url,"%s/eventBatch",event_api_url);
+  evel_batch_api_url = strdup(batch_api_url);
+  assert(evel_batch_api_url != NULL);
   evel_throt_api_url = strdup(throt_api_url);
   assert(evel_throt_api_url != NULL);
 
@@ -790,7 +795,37 @@ static void * event_handler(void * arg __attribute__ ((unused)))
     /* Internal events get special treatment while regular events get posted */
     /* to the far side.                                                      */
     /*************************************************************************/
-    if (msg->event_domain != EVEL_DOMAIN_INTERNAL)
+    if (msg->event_domain == EVEL_DOMAIN_BATCH )
+    {
+      EVEL_DEBUG("Batch event received");
+
+      /***********************************************************************/
+      /* Encode the event in JSON.                                           */
+      /***********************************************************************/
+      json_size = evel_json_encode_batch_event(json_body, EVEL_MAX_JSON_BODY, msg);
+
+      /***************************************************************************/
+      /* Set the URL for the API.                                                */
+      /***************************************************************************/
+      curl_rc = curl_easy_setopt(curl_handle, CURLOPT_URL, evel_batch_api_url);
+      if (curl_rc != CURLE_OK)
+      {
+        rc = EVEL_CURL_LIBRARY_FAIL;
+        log_error_state("Failed to initialize libCURL with the Batch API URL. "
+                    "Error code=%d (%s)", curl_rc, curl_err_string);
+      }
+
+      /***********************************************************************/
+      /* Send the JSON across the API.                                       */
+      /***********************************************************************/
+      EVEL_DEBUG("Sending Batch JSON of size %d is: %s", json_size, json_body);
+      rc = evel_post_api(json_body, json_size);
+      if (rc != EVEL_SUCCESS)
+      {
+        EVEL_ERROR("Failed to transfer the data. Error code=%d", rc);
+      }
+    }
+    else if (msg->event_domain != EVEL_DOMAIN_INTERNAL )
     {
       EVEL_DEBUG("External event received");
 
@@ -799,6 +834,17 @@ static void * event_handler(void * arg __attribute__ ((unused)))
       /***********************************************************************/
       json_size = evel_json_encode_event(json_body, EVEL_MAX_JSON_BODY, msg);
 
+      /***************************************************************************/
+      /* Set the URL for the API.                                                */
+      /***************************************************************************/
+      curl_rc = curl_easy_setopt(curl_handle, CURLOPT_URL, evel_event_api_url);
+      if (curl_rc != CURLE_OK)
+      {
+        rc = EVEL_CURL_LIBRARY_FAIL;
+        log_error_state("Failed to initialize libCURL with the API URL. "
+                    "Error code=%d (%s)", curl_rc, curl_err_string);
+      }
+
       /***********************************************************************/
       /* Send the JSON across the API.                                       */
       /***********************************************************************/
diff --git a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_jsonobject.c b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_jsonobject.c
index 85f65ca1..4f788bd1 100644
--- a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_jsonobject.c
+++ b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_jsonobject.c
@@ -113,7 +113,7 @@ EVEL_JSON_OBJECT_INSTANCE * evel_new_jsonobjinstance(const char *const yourjson)
   assert(len > 0);
 
   /***************************************************************************/
-  /*  Validate JSON for json object
+  /*  Validate JSON for json object */
   /***************************************************************************/
   jsmn_init(&p);
   resultCode = jsmn_parse(&p, yourjson, len, tokens, sizeof(tokens)/sizeof(tokens[0]));
@@ -397,7 +397,7 @@ void evel_free_jsonobjinst(EVEL_JSON_OBJECT_INSTANCE * objinst)
   free(objinst->jsonstring);
 
   /***************************************************************************/
-  /* Free all internal internal keys
+  /* Free all internal internal keys */
   /***************************************************************************/
   other_field = dlist_pop_last(&objinst->object_keys);
   while (other_field != NULL)
diff --git a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_other.c b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_other.c
index 4888d28e..774c5223 100644
--- a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_other.c
+++ b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_other.c
@@ -118,7 +118,6 @@ void evel_other_type_set(EVENT_OTHER * other,
  *****************************************************************************/
 void evel_other_field_set_namedarraysize(EVENT_OTHER * other, const int size)
 {
-  OTHER_FIELD * other_field = NULL;
   EVEL_ENTER();
 
   /***************************************************************************/
diff --git a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_reporting_measurement.c b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_reporting_measurement.c
index 0f303728..aa6675fd 100644
--- a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_reporting_measurement.c
+++ b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_reporting_measurement.c
@@ -330,7 +330,7 @@ void evel_json_encode_report(EVEL_JSON_BUFFER * jbuf,
       {
         evel_json_open_object(jbuf);
         evel_enc_kv_string(jbuf, "name", measurement_group->name);
-        evel_json_open_named_list(jbuf, "arrayOfFields");
+        evel_json_open_named_list(jbuf, "measurements");
 
         /*********************************************************************/
         /* Measurements list.                                                */
diff --git a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_scaling_measurement.c b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_scaling_measurement.c
index b73eb978..cb3e88fb 100644
--- a/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_scaling_measurement.c
+++ b/vnfs/VES5.0/evel/evel-library/code/evel_library/evel_scaling_measurement.c
@@ -3519,7 +3519,7 @@ void evel_json_encode_measurement(EVEL_JSON_BUFFER * jbuf,
       {
         evel_json_open_object(jbuf);
         evel_enc_kv_string(jbuf, "name", measurement_group->name);
-        evel_json_open_opt_named_list(jbuf, "arrayOfFields");
+        evel_json_open_opt_named_list(jbuf, "measurements");
 
         /*********************************************************************/
         /* Measurements list.                                                */
diff --git a/vnfs/VES5.0/evel/evel-library/code/evel_library/metadata.c b/vnfs/VES5.0/evel/evel-library/code/evel_library/metadata.c
index 62ea6b51..fceb893c 100644
--- a/vnfs/VES5.0/evel/evel-library/code/evel_library/metadata.c
+++ b/vnfs/VES5.0/evel/evel-library/code/evel_library/metadata.c
@@ -23,6 +23,7 @@
 #include <string.h>
 #include <assert.h>
 #include <malloc.h>
+#include <unistd.h>
 
 #include <curl/curl.h>
 
@@ -313,12 +314,30 @@ exit_label:
  *****************************************************************************/
 void openstack_metadata_initialize()
 {
+  char hostname[MAX_METADATA_STRING];
+
+  FILE * f = fopen ("/proc/sys/kernel/random/uuid", "r");
+
   strncpy(vm_uuid,
           "Dummy VM UUID - No Metadata available",
           MAX_METADATA_STRING);
   strncpy(vm_name,
           "Dummy VM name - No Metadata available",
           MAX_METADATA_STRING);
+
+  if( gethostname(hostname, 1024) != -1 )
+      strcpy(vm_name,hostname);
+
+  if (f)
+  {
+    if (fgets(vm_uuid,MAX_METADATA_STRING, f)!=NULL)
+    {
+      vm_uuid[strlen( vm_uuid ) - 1 ] = '\0';
+      EVEL_DEBUG("VM UUID: %s", vm_uuid);
+    }
+    fclose (f);
+  }
+
 }
 
 /**************************************************************************//**