[SDNC-5] Split listeners

[sdnc/northbound.git] / dmaap-listener / src / main / java / org / openecomp / sdnc / dmaapclient / SdncDmaapConsumer.java

diff --git a/dmaap-listener/src/main/java/org/openecomp/sdnc/dmaapclient/SdncDmaapConsumer.java b/dmaap-listener/src/main/java/org/openecomp/sdnc/dmaapclient/SdncDmaapConsumer.java
new file mode 100644 (file)
index 0000000..42ae1a2
--- /dev/null
+++ b/dmaap-listener/src/main/java/org/openecomp/sdnc/dmaapclient/SdncDmaapConsumer.java
@@ -0,0 +1,146 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * openECOMP : SDN-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.sdnc.dmaapclient;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.util.Properties;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.att.nsa.mr.client.MRClientFactory;
+import com.att.nsa.mr.client.MRConsumer;
+import com.att.nsa.mr.client.response.MRConsumerResponse;
+
+public abstract class SdncDmaapConsumer implements Runnable {
+
+       private static final Logger LOG = LoggerFactory
+                       .getLogger(SdncDmaapConsumer.class);
+
+       private String propertiesPath = "";
+       private Properties properties = null;
+       MRConsumer consumer = null;
+       MRConsumerResponse consumerResponse = null;
+       boolean running = false;
+       boolean ready = false;
+       int fetchPause = 5000; // Default pause between fetchs - 5 seconds
+
+       public boolean isReady() {
+               return ready;
+       }
+
+       int timeout = 15000; // Default timeout - 15 seconds
+
+       public boolean isRunning() {
+               return running;
+       }
+
+       public SdncDmaapConsumer() {
+
+       }
+
+       public SdncDmaapConsumer(Properties properties, String propertiesPath) {
+               init(properties, propertiesPath);
+       }
+
+       public String getProperty(String name) {
+               return(properties.getProperty(name, ""));
+       }
+
+       public void init(Properties properties, String propertiesPath) {
+
+               this.propertiesPath = propertiesPath;
+
+               try {
+
+                       this.properties = (Properties) properties.clone();
+
+                       this.properties.load(new FileInputStream(new File(propertiesPath)));
+
+                       String timeoutStr = properties.getProperty("timeout");
+
+                       if ((timeoutStr != null) && (timeoutStr.length() > 0)) {
+                               try {
+                                       timeout = Integer.parseInt(timeoutStr);
+                               } catch (NumberFormatException e) {
+                                       LOG.error("Non-numeric value specified for timeout ("+timeoutStr+")");
+                               }
+                       }
+
+                       String fetchPauseStr = properties.getProperty("fetchPause");
+                       if ((fetchPauseStr != null) && (fetchPauseStr.length() > 0)) {
+                               try {
+                                       fetchPause = Integer.parseInt(fetchPauseStr);
+                               } catch (NumberFormatException e) {
+                                       LOG.error("Non-numeric valud specified for fetchPause ("+fetchPauseStr+")");
+                               }
+                       }
+
+                       this.consumer = MRClientFactory.createConsumer(propertiesPath);
+                       ready = true;
+               } catch (Exception e) {
+                       LOG.error("Error initializing DMaaP consumer from file "+propertiesPath, e);
+               }
+       }
+
+
+       @Override
+       public void run() {
+               if (ready) {
+
+                       running = true;
+
+                       while (running) {
+
+                               try {
+                                       boolean noData = true;
+                                       consumerResponse = consumer.fetchWithReturnConsumerResponse(timeout, -1);
+                                       for (String msg : consumerResponse.getActualMessages()) {
+                                               noData = false;
+                                               LOG.info("Received message from DMaaP:\n"+msg);
+                                               processMsg(msg);
+                                       }
+
+                                       if (noData) {
+                                               if (fetchPause > 0) {
+
+                                                       LOG.info("No data received from fetch.  Pausing "+fetchPause+" ms before retry");
+                                                       Thread.sleep(fetchPause);
+                                               } else {
+
+                                                       LOG.info("No data received from fetch.  No fetch pause specified - retrying immediately");
+                                               }
+                                       }
+                               } catch (Exception e) {
+                                       LOG.error("Caught exception reading from DMaaP", e);
+                                       running = false;
+                               }
+
+
+                       }
+               }
+
+       }
+
+       abstract public void processMsg(String msg) throws InvalidMessageException;
+}