1 files changed, 116 insertions, 0 deletions
diff --git a/dcae-analytics-cdap-tca/src/main/java/org/openecomp/dcae/apod/analytics/cdap/tca/worker/BaseTCADMaaPMRWorker.java b/dcae-analytics-cdap-tca/src/main/java/org/openecomp/dcae/apod/analytics/cdap/tca/worker/BaseTCADMaaPMRWorker.java
new file mode 100644
index 0000000..6623321
--- /dev/null
+++ b/dcae-analytics-cdap-tca/src/main/java/org/openecomp/dcae/apod/analytics/cdap/tca/worker/BaseTCADMaaPMRWorker.java
@@ -0,0 +1,116 @@
+/*
+ * ===============================LICENSE_START======================================
+ *  dcae-analytics
+ * ================================================================================
+ *    Copyright © 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.dcae.apod.analytics.cdap.tca.worker;
+
+import co.cask.cdap.api.worker.AbstractWorker;
+import com.google.common.base.Preconditions;
+import org.openecomp.dcae.apod.analytics.common.AnalyticsConstants;
+import org.openecomp.dcae.apod.analytics.common.exception.DCAEAnalyticsRuntimeException;
+import org.quartz.Scheduler;
+import org.quartz.SchedulerException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import static java.lang.String.format;
+
+/**
+ * Base logic for DMaaP Workers which uses scheduler to poll DMaaP MR topics at frequent intervals
+ * <p>
+ * @author Rajiv Singla . Creation Date: 12/19/2016.
+ */
+public abstract class BaseTCADMaaPMRWorker extends AbstractWorker {
+
+    private static final Logger LOG = LoggerFactory.getLogger(BaseTCADMaaPMRWorker.class);
+
+    /**
+     * Quartz Scheduler
+     */
+    protected Scheduler scheduler;
+    /**
+     * Determines if scheduler is shutdown
+     */
+    protected AtomicBoolean isSchedulerShutdown;
+
+
+    @Override
+    public void run() {
+
+        Preconditions.checkNotNull(scheduler, "Scheduler must not be null");
+        String schedulerName = "";
+
+        // Start scheduler
+        try {
+            schedulerName = scheduler.getSchedulerName();
+            scheduler.start();
+            isSchedulerShutdown.getAndSet(false);
+
+        } catch (SchedulerException e) {
+            final String errorMessage =
+                    format("Error while starting TCA DMaaP MR scheduler name: %s, error: %s", schedulerName, e);
+            throw new DCAEAnalyticsRuntimeException(errorMessage, LOG, e);
+        }
+
+        LOG.info("Successfully started DMaaP MR Scheduler: {}", schedulerName);
+
+        // indefinite loop which wakes up and confirms scheduler is indeed running
+        while (!isSchedulerShutdown.get()) {
+            try {
+
+                Thread.sleep(AnalyticsConstants.TCA_DEFAULT_WORKER_SHUTDOWN_CHECK_INTERVAL_MS);
+
+            } catch (InterruptedException e) {
+
+                final String errorMessage =
+                        format("Error while checking TCA DMaaP MR Scheduler worker status name: %s, error: %s",
+                                schedulerName, e);
+                throw new DCAEAnalyticsRuntimeException(errorMessage, LOG, e);
+            }
+        }
+
+        LOG.info("Finished execution of TCA DMaaP MR worker thread: {}", schedulerName);
+
+    }
+
+    @Override
+    public void stop() {
+
+        Preconditions.checkNotNull(scheduler, "Scheduler must not be null");
+        String schedulerName = "";
+
+        // Stop Scheduler
+        try {
+            schedulerName = scheduler.getSchedulerName();
+            LOG.info("Shutting TCA DMaaP MR Scheduler: {}", schedulerName);
+            scheduler.shutdown();
+            isSchedulerShutdown.getAndSet(true);
+
+        } catch (SchedulerException e) {
+
+            final String errorMessage =
+                    format("Error while shutting down TCA DMaaP MR Scheduler: name: %s, error: %s", schedulerName, e);
+            throw new DCAEAnalyticsRuntimeException(errorMessage, LOG, e);
+        }
+    }
+
+
+}