1 files changed, 120 insertions, 0 deletions
diff --git a/src/main/java/org/onap/dmaap/dmf/mr/backends/kafka/Kafka011ConsumerUtil.java b/src/main/java/org/onap/dmaap/dmf/mr/backends/kafka/Kafka011ConsumerUtil.java
new file mode 100644
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+++ b/src/main/java/org/onap/dmaap/dmf/mr/backends/kafka/Kafka011ConsumerUtil.java
@@ -0,0 +1,120 @@
+/*******************************************************************************
+ *  ============LICENSE_START=======================================================
+ *  org.onap.dmaap
+ *  ================================================================================
+ *  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=========================================================
+ *  
+ *  ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ *  
+ *******************************************************************************/
+package org.onap.dmaap.dmf.mr.backends.kafka;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+import org.apache.kafka.clients.consumer.ConsumerRecords;
+
+import java.util.ArrayList;
+
+/**
+ * A consumer Util class for force polling when a rebalance issue is anticipated
+ * 
+ * @author Ram
+ *
+ */
+public class Kafka011ConsumerUtil {
+	private static final EELFLogger log = EELFManager.getInstance().getLogger(Kafka011ConsumerUtil.class);
+
+	/**
+	 * @param fconsumercache
+	 * @param fTopic
+	 * @param fGroup
+	 * @param fId
+	 * @return
+	 */
+	public static boolean forcePollOnConsumer(final String fTopic, final String fGroup, final String fId) {
+
+		Thread forcepollThread = new Thread(new Runnable() {
+			public void run() {
+				try {
+
+					ArrayList<Kafka011Consumer> kcsList = null;
+
+					kcsList = KafkaConsumerCache.getInstance().getConsumerListForCG(fTopic + "::" + fGroup + "::", fId);
+					if (null != kcsList) {
+						for (int counter = 0; counter < kcsList.size(); counter++) {
+
+							Kafka011Consumer kc1 = kcsList.get(counter);
+
+							try {
+								ConsumerRecords<String, String> recs = kc1.getConsumer().poll(0);
+								log.info("soft poll on " + kc1);
+							} catch (java.util.ConcurrentModificationException e) {
+								log.error("Error occurs for " + e);
+							}
+
+						}
+
+					}
+
+				} catch (Exception e) {
+					log.error("Failed and go to Exception block for " + fGroup +" ", e);
+				}
+			}
+		});
+
+		forcepollThread.start();
+
+		return false;
+
+	}
+
+	/**
+	 * @param fconsumercache
+	 * @param group
+	 * @return
+	 */
+	public static boolean forcePollOnConsumer(final String group) {
+
+		Thread forcepollThread = new Thread(new Runnable() {
+			public void run() {
+				try {
+					ArrayList<Kafka011Consumer> kcsList = new ArrayList<Kafka011Consumer>();
+					kcsList = KafkaConsumerCache.getInstance().getConsumerListForCG(group);
+
+					if (null != kcsList) {
+
+						for (int counter = 0; counter < kcsList.size(); counter++) {
+
+							Kafka011Consumer kc1 = kcsList.get(counter);
+							log.info("soft poll on remote nodes " + kc1);
+							ConsumerRecords<String, String> recs = kc1.getConsumer().poll(0);
+						}
+
+					}
+
+				} catch (java.util.ConcurrentModificationException e) {
+					log.error("Error occurs for ", e);
+				} catch (Exception e) {
+					log.error("Failed and go to Exception block for " + group + " ", e);
+				}
+			}
+		});
+
+		forcepollThread.start();
+		return false;
+
+	}
+
+}