/**
* 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.camel.component.aws.sqs;
import java.util.HashMap;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.sqs.AmazonSQSClient;
import com.amazonaws.services.sqs.model.CreateQueueRequest;
import com.amazonaws.services.sqs.model.CreateQueueResult;
import org.apache.camel.Consumer;
import org.apache.camel.Exchange;
import org.apache.camel.ExchangePattern;
import org.apache.camel.Message;
import org.apache.camel.Processor;
import org.apache.camel.Producer;
import org.apache.camel.impl.DefaultExchange;
import org.apache.camel.impl.ScheduledPollEndpoint;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Defines the <a href="http://camel.apache.org/aws.html">AWS SQS Endpoint</a>.
*
* @version $Revision: $
*/
public class SqsEndpoint extends ScheduledPollEndpoint {
private static final transient Log LOG = LogFactory.getLog(SqsEndpoint.class);
private AmazonSQSClient client;
private String queueUrl;
private SqsConfiguration configuration;
private int maxMessagesPerPoll;
public SqsEndpoint(String uri, SqsComponent component, SqsConfiguration configuration) {
super(uri, component);
this.configuration = configuration;
}
public Producer createProducer() throws Exception {
return new SqsProducer(this);
}
public Consumer createConsumer(Processor processor) throws Exception {
SqsConsumer sqsConsumer = new SqsConsumer(this, processor);
configureConsumer(sqsConsumer);
return sqsConsumer;
}
public boolean isSingleton() {
return true;
}
@Override
public void start() throws Exception {
super.start();
client = getConfiguration().getAmazonSQSClient() != null
? getConfiguration().getAmazonSQSClient() : getClient();
// creates a new queue, or returns the URL of an existing one
CreateQueueRequest request = new CreateQueueRequest(configuration.getQueueName());
request.setDefaultVisibilityTimeout(getConfiguration().getDefaultVisibilityTimeout() != null ? getConfiguration().getDefaultVisibilityTimeout() : null);
if (LOG.isTraceEnabled()) {
LOG.trace("Creating queue [" + configuration.getQueueName() + "] with request [" + request + "]...");
}
CreateQueueResult queueResult = client.createQueue(request);
queueUrl = queueResult.getQueueUrl();
if (LOG.isTraceEnabled()) {
LOG.trace("Queue created and available at: " + queueUrl);
}
}
@Override
public void stop() throws Exception {
client = null;
super.stop();
}
public Exchange createExchange(com.amazonaws.services.sqs.model.Message msg) {
return createExchange(getExchangePattern(), msg);
}
private Exchange createExchange(ExchangePattern pattern, com.amazonaws.services.sqs.model.Message msg) {
Exchange exchange = new DefaultExchange(this, pattern);
Message message = exchange.getIn();
message.setBody(msg.getBody());
message.setHeaders(new HashMap<String, Object>(msg.getAttributes()));
message.setHeader(SqsConstants.MESSAGE_ID, msg.getMessageId());
message.setHeader(SqsConstants.MD5_OF_BODY, msg.getMD5OfBody());
message.setHeader(SqsConstants.RECEIPT_HANDLE, msg.getReceiptHandle());
message.setHeader(SqsConstants.ATTRIBUTES, msg.getAttributes());
return exchange;
}
public SqsConfiguration getConfiguration() {
return configuration;
}
public void setConfiguration(SqsConfiguration configuration) {
this.configuration = configuration;
}
public AmazonSQSClient getClient() {
if (client == null) {
client = createClient();
}
return client;
}
public void setClient(AmazonSQSClient client) {
this.client = client;
}
/**
* Provide the possibility to override this method for an mock implementation
* @return AmazonSQSClient
*/
AmazonSQSClient createClient() {
AWSCredentials credentials = new BasicAWSCredentials(configuration.getAccessKey(), configuration.getSecretKey());
return new AmazonSQSClient(credentials);
}
protected String getQueueUrl() {
return queueUrl;
}
public int getMaxMessagesPerPoll() {
return maxMessagesPerPoll;
}
public void setMaxMessagesPerPoll(int maxMessagesPerPoll) {
this.maxMessagesPerPoll = maxMessagesPerPoll;
}
}