1 files changed, 163 insertions, 0 deletions
diff --git a/appc-adapters/appc-dmaap-adapter/appc-dmaap-adapter-bundle/src/main/java/org/openecomp/appc/adapter/dmaap/DmaapConsumer.java b/appc-adapters/appc-dmaap-adapter/appc-dmaap-adapter-bundle/src/main/java/org/openecomp/appc/adapter/dmaap/DmaapConsumer.java
new file mode 100644
index 000000000..6e16d896b
--- /dev/null
+++ b/appc-adapters/appc-dmaap-adapter/appc-dmaap-adapter-bundle/src/main/java/org/openecomp/appc/adapter/dmaap/DmaapConsumer.java
@@ -0,0 +1,163 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * openECOMP : APP-C
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights
+ * 						reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.appc.adapter.dmaap;
+
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+
+import org.apache.http.HttpEntity;
+import org.apache.http.NameValuePair;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.utils.URIBuilder;
+import org.apache.http.message.BasicNameValuePair;
+import org.apache.http.util.EntityUtils;
+import org.json.JSONArray;
+
+public class DmaapConsumer extends CommonHttpClient implements Consumer {
+
+    private static final EELFLogger LOG = EELFManager.getInstance().getLogger(DmaapConsumer.class);
+
+    // Default values
+    private static final int DEFAULT_TIMEOUT_MS = 15000;
+    private static final int DEFAULT_LIMIT = 1000;
+    private static final String HTTPS_PORT = ":3905";
+    private static final String URL_TEMPLATE = "%s/events/%s/%s/%s";
+
+    private List<String> urls;
+    private String filter;
+
+    private boolean useHttps = false;
+
+    public DmaapConsumer(Collection<String> hosts, String topicName, String consumerName, String consumerId) {
+        this(hosts, topicName, consumerName, consumerId, null);
+    }
+
+    public DmaapConsumer(Collection<String> hosts, String topicName, String consumerName, String consumerId,
+                        String filter) {
+        this(hosts, topicName, consumerName, consumerId, filter, null, null);
+    }
+
+    public DmaapConsumer(Collection<String> hosts, String topicName, String consumerName, String consumerId,
+                        String filter, String user, String password) {
+        urls = new ArrayList<String>();
+        for (String host : hosts) {
+            urls.add(String.format(URL_TEMPLATE, formatHostString(host), topicName, consumerName, consumerId));
+        }
+        this.filter = filter;
+        updateCredentials(user, password);
+    }
+
+    @Override
+    public void updateCredentials(String user, String pass) {
+        LOG.debug(String.format("Setting auth to %s for %s", user, this.toString()));
+        this.setBasicAuth(user, pass);
+    }
+
+    @Override
+    public List<String> fetch(int waitMs, int limit) {
+        LOG.debug(String.format("Fetching up to %d records with %dms wait on %s", limit, waitMs, this.toString()));
+        List<String> out = new ArrayList<String>();
+        try {
+            List<NameValuePair> urlParams = new ArrayList<NameValuePair>();
+            urlParams.add(new BasicNameValuePair("timeout", String.valueOf(waitMs)));
+            urlParams.add(new BasicNameValuePair("limit", String.valueOf(limit)));
+            if (filter != null) {
+                urlParams.add(new BasicNameValuePair("filter", filter));
+            }
+
+            URIBuilder builder = new URIBuilder(urls.get(0));
+            builder.setParameters(urlParams);
+
+            URI uri = builder.build();
+            LOG.info(String.format("GET %s", uri));
+            HttpGet request = getReq(uri, waitMs);
+            CloseableHttpResponse response = getClient().execute(request);
+
+            int httpStatus = response.getStatusLine().getStatusCode();
+            HttpEntity entity = response.getEntity();
+            String body = (entity != null) ? EntityUtils.toString(entity) : null;
+
+            LOG.debug(String.format("Request to %s completed with status %d and a body size of %s", uri, httpStatus,
+                (body != null ? body.length() : "null")));
+
+            response.close();
+            if (httpStatus == 200 && body != null) {
+                JSONArray json = new JSONArray(body);
+                LOG.info(String.format("Got %d messages from DMaaP", json.length()));
+                for (int i = 0; i < json.length(); i++) {
+                    out.add(json.getString(i));
+                }
+            } else {
+                LOG.error(String.format("Did not get 200 from DMaaP. Got %d - %s", httpStatus, body));
+                sleep(waitMs);
+            }
+        } catch (Exception e) {
+            if (urls.size() > 1) {
+                String failedUrl = urls.remove(0);
+                urls.add(failedUrl);
+                LOG.debug(String.format("Moving host %s to the end of the pool. New primary host is %s", failedUrl,
+                    urls.get(0)));
+            }
+            LOG.error(String.format("Got exception while querying DMaaP. Message: %s", e.getMessage()), e);
+            sleep(waitMs);
+        }
+
+        return out;
+    }
+
+    @Override
+    public List<String> fetch() {
+        return fetch(DEFAULT_TIMEOUT_MS, DEFAULT_LIMIT);
+    }
+
+    @Override
+    public String toString() {
+        String hostStr = (urls == null && !urls.isEmpty()) ? "N/A" : urls.get(0);
+        return String.format("Consumer listening to [%s]", hostStr);
+    }
+
+    @Override
+    public void useHttps(boolean yes) {
+        useHttps = yes;
+    }
+
+    private void sleep(int ms) {
+        LOG.info(String.format("Sleeping for %ds after failed request", ms / 1000));
+        try {
+            Thread.sleep(ms);
+        } catch (InterruptedException e1) {
+            LOG.error("Interrupted while sleeping");
+        }
+    }
+    
+    public void close(){
+    	//not used yet
+    }
+
+}