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Posted to commits@airavata.apache.org by ch...@apache.org on 2014/09/17 22:21:31 UTC
git commit: adding pull request
Repository: airavata
Updated Branches:
refs/heads/messaging_framework 288fb82aa -> a7581e747
adding pull request
Project: http://git-wip-us.apache.org/repos/asf/airavata/repo
Commit: http://git-wip-us.apache.org/repos/asf/airavata/commit/a7581e74
Tree: http://git-wip-us.apache.org/repos/asf/airavata/tree/a7581e74
Diff: http://git-wip-us.apache.org/repos/asf/airavata/diff/a7581e74
Branch: refs/heads/messaging_framework
Commit: a7581e747f26704a6236df16bd4530ef095143c3
Parents: 288fb82
Author: supunkamburugamuva <su...@gmail.com>
Authored: Tue Sep 16 15:09:09 2014 -0400
Committer: Chathuri Wimalasena <ka...@gmail.com>
Committed: Wed Sep 17 16:21:24 2014 -0400
----------------------------------------------------------------------
.../core/impl/AiravataRabbitMQPublisher.java | 3 +
.../messaging/core/impl/RabbitMQProducer.java | 192 +++++++++++++++++++
2 files changed, 195 insertions(+)
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http://git-wip-us.apache.org/repos/asf/airavata/blob/a7581e74/modules/messaging/core/src/main/java/org/apache/airavata/messaging/core/impl/AiravataRabbitMQPublisher.java
----------------------------------------------------------------------
diff --git a/modules/messaging/core/src/main/java/org/apache/airavata/messaging/core/impl/AiravataRabbitMQPublisher.java b/modules/messaging/core/src/main/java/org/apache/airavata/messaging/core/impl/AiravataRabbitMQPublisher.java
index 83e7426..7fc5342 100644
--- a/modules/messaging/core/src/main/java/org/apache/airavata/messaging/core/impl/AiravataRabbitMQPublisher.java
+++ b/modules/messaging/core/src/main/java/org/apache/airavata/messaging/core/impl/AiravataRabbitMQPublisher.java
@@ -28,6 +28,9 @@ import org.apache.airavata.model.messaging.event.TaskStatusChangeEvent;
import org.apache.airavata.model.messaging.event.WorkflowNodeStatusChangeEvent;
public class AiravataRabbitMQPublisher implements Publisher {
+ public AiravataRabbitMQPublisher() {
+ }
+
public void publish(ExperimentStatusChangeEvent event) {
}
http://git-wip-us.apache.org/repos/asf/airavata/blob/a7581e74/modules/messaging/core/src/main/java/org/apache/airavata/messaging/core/impl/RabbitMQProducer.java
----------------------------------------------------------------------
diff --git a/modules/messaging/core/src/main/java/org/apache/airavata/messaging/core/impl/RabbitMQProducer.java b/modules/messaging/core/src/main/java/org/apache/airavata/messaging/core/impl/RabbitMQProducer.java
new file mode 100644
index 0000000..e52161f
--- /dev/null
+++ b/modules/messaging/core/src/main/java/org/apache/airavata/messaging/core/impl/RabbitMQProducer.java
@@ -0,0 +1,192 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.
+ *
+ */
+
+package org.apache.airavata.messaging.core.impl;
+
+import com.rabbitmq.client.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+public class RabbitMQProducer {
+ private static Logger log = LoggerFactory.getLogger(RabbitMQProducer.class);
+
+ private Connection connection;
+
+ private Channel channel;
+
+ private QueueingConsumer consumer;
+
+ private String consumerTag;
+
+ private String exchangeName;
+
+ private String routingKey;
+
+ private int prefetchCount;
+
+ private boolean isReQueueOnFail = false;
+
+ private String url;
+
+ public RabbitMQProducer(String url, String routingKey, String exchangeName,
+ int prefetchCount, boolean isReQueueOnFail) {
+ this.prefetchCount = prefetchCount;
+ this.isReQueueOnFail = isReQueueOnFail;
+ this.exchangeName = exchangeName;
+ this.routingKey = routingKey;
+ this.url = url;
+ }
+
+ private void reset() {
+ consumerTag = null;
+ }
+
+ private void reInitIfNecessary() throws Exception {
+ if (consumerTag == null || consumer == null) {
+ close();
+ open();
+ }
+ }
+
+ public void close() {
+ log.info("Closing channel to exchange {}", exchangeName);
+ try {
+ if (channel != null && channel.isOpen()) {
+ if (consumerTag != null) {
+ channel.basicCancel(consumerTag);
+ }
+ channel.close();
+ }
+ } catch (Exception e) {
+ log.debug("error closing channel and/or cancelling consumer", e);
+ }
+ try {
+ log.info("closing connection to rabbitmq: " + connection);
+ connection.close();
+ } catch (Exception e) {
+ log.debug("error closing connection", e);
+ }
+ consumer = null;
+ consumerTag = null;
+ channel = null;
+ connection = null;
+ }
+
+ public void open() throws Exception {
+ try {
+ connection = createConnection();
+ channel = connection.createChannel();
+ if (prefetchCount > 0) {
+ log.info("setting basic.qos / prefetch count to " + prefetchCount + " for " + exchangeName);
+ channel.basicQos(prefetchCount);
+ }
+ channel.exchangeDeclare(exchangeName, "fanout", false);
+ } catch (Exception e) {
+ reset();
+ String msg = "could not open channel for exchange " + exchangeName;
+ log.error(msg);
+ throw new Exception(msg, e);
+ }
+ }
+
+ public void send(byte []message) throws Exception {
+ try {
+ channel.basicPublish(exchangeName, routingKey, null, message);
+ } catch (IOException e) {
+ String msg = "Failed to publish message to exchange: " + exchangeName;
+ log.error(msg, e);
+ throw new Exception(msg, e);
+ }
+ }
+
+ private Connection createConnection() throws IOException {
+ try {
+ ConnectionFactory connectionFactory = new ConnectionFactory();
+ connectionFactory.setUri(url);
+ Connection connection = connectionFactory.newConnection();
+ connection.addShutdownListener(new ShutdownListener() {
+ @Override
+ public void shutdownCompleted(ShutdownSignalException cause) {
+ }
+ });
+ log.info("connected to rabbitmq: " + connection + " for " + exchangeName);
+ return connection;
+ } catch (Exception e) {
+ log.info("connection failed to rabbitmq: " + connection + " for " + exchangeName);
+ return null;
+ }
+ }
+
+ public void ackMessage(Long msgId) throws Exception {
+ try {
+ channel.basicAck(msgId, false);
+ } catch (ShutdownSignalException sse) {
+ reset();
+ String msg = "shutdown signal received while attempting to ack message";
+ log.error(msg, sse);
+ throw new Exception(msg, sse);
+ } catch (Exception e) {
+ String s = "could not ack for msgId: " + msgId;
+ log.error(s, e);
+ throw new Exception(s, e);
+ }
+ }
+
+ public void failMessage(Long msgId) throws Exception {
+ if (isReQueueOnFail) {
+ failWithRedelivery(msgId);
+ } else {
+ deadLetter(msgId);
+ }
+ }
+
+ public void failWithRedelivery(Long msgId) throws Exception {
+ try {
+ channel.basicReject(msgId, true);
+ } catch (ShutdownSignalException sse) {
+ reset();
+ String msg = "shutdown signal received while attempting to fail with redelivery";
+ log.error(msg, sse);
+ throw new Exception(msg, sse);
+ } catch (Exception e) {
+ String msg = "could not fail with redelivery for msgId: " + msgId;
+ log.error(msg, e);
+ throw new Exception(msg, e);
+ }
+ }
+
+ public void deadLetter(Long msgId) throws Exception {
+ try {
+ channel.basicReject(msgId, false);
+ } catch (ShutdownSignalException sse) {
+ reset();
+ String msg = "shutdown signal received while attempting to fail with no redelivery";
+ log.error(msg, sse);
+ throw new Exception(msg, sse);
+ } catch (Exception e) {
+ String msg = "could not fail with dead-lettering (when configured) for msgId: " + msgId;
+ log.error(msg, e);
+ throw new Exception(msg, e);
+ }
+ }
+}