1 files changed, 93 insertions, 0 deletions
diff --git a/catalog-model/src/main/java/org/openecomp/sdc/be/model/cache/workers/CacheWorker.java b/catalog-model/src/main/java/org/openecomp/sdc/be/model/cache/workers/CacheWorker.java
new file mode 100644
index 0000000000..7d6ff49507
--- /dev/null
+++ b/catalog-model/src/main/java/org/openecomp/sdc/be/model/cache/workers/CacheWorker.java
@@ -0,0 +1,93 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * 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.sdc.be.model.cache.workers;
+
+import org.openecomp.sdc.be.model.cache.jobs.Job;
+import org.openecomp.sdc.be.model.cache.workers.IWorker;
+import org.openecomp.sdc.be.workers.Worker;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Created by mlando on 9/6/2016. the class represents a worker the pull job
+ * from a queue and evacuates them.
+ *
+ */
+public class CacheWorker implements Runnable, IWorker {
+	private String workerName;
+	private static Logger log = LoggerFactory.getLogger(Worker.class.getName());
+	private LinkedBlockingQueue<Job> jobQueue;
+	private volatile boolean shutdown = false;
+
+	/**
+	 * constructor
+	 * 
+	 * @param workerName
+	 *            the name of the given worker
+	 * @param jobQueue
+	 *            the queue the worker will block on.
+	 */
+	public CacheWorker(String workerName, LinkedBlockingQueue<Job> jobQueue) {
+		this.workerName = workerName;
+		this.jobQueue = jobQueue;
+	}
+
+	/**
+	 * the method will try to get a job if one is avilable it will be retrived
+	 * and handled. if no jobs are available the worker will block for 500
+	 * milliseconds and then it wil check if it needs to shutdown. if not it
+	 * will block again and so on until sutdown or a new job is available
+	 */
+	@Override
+	public void run() {
+		while (true) {
+			log.trace("CacheWorker:{} doing work", workerName);
+			try {
+				Job job = jobQueue.poll(500, TimeUnit.MILLISECONDS);
+				if (job != null) {
+					job.doWork();
+					log.trace("worker:{} done with work", workerName);
+				}
+			} catch (Throwable e) {
+				log.debug("worker {} failed during job execution.", workerName);
+				log.debug("exception", e);
+			}
+			if (shutdown) {
+				log.debug("worker:{} nothing to do stoping", workerName);
+				break;
+			}
+		}
+
+	}
+
+	/**
+	 * the method sets the shutdown flag, when set the worker will stop it's
+	 * execution as soon as possible with out completing its work
+	 */
+	@Override
+	public void shutDown() {
+		this.shutdown = true;
+	}
+
+}