1 files changed, 146 insertions, 0 deletions
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
index 000000000..5b55bda5b
--- /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 ONAP 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;
+}