/**
* 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.beanstalk;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import com.surftools.BeanstalkClient.BeanstalkException;
import com.surftools.BeanstalkClient.Client;
import org.apache.camel.AsyncCallback;
import org.apache.camel.AsyncProcessor;
import org.apache.camel.Exchange;
import org.apache.camel.component.beanstalk.processors.Command;
import org.apache.camel.impl.DefaultProducer;
public class BeanstalkProducer extends DefaultProducer implements AsyncProcessor {
private ExecutorService executor;
private Client client;
private final Command command;
public BeanstalkProducer(BeanstalkEndpoint endpoint, final Command command) throws Exception {
super(endpoint);
this.command = command;
}
public Command getCommand() {
return command;
}
@Override
public void process(final Exchange exchange) throws Exception {
Future f = executor.submit(new RunCommand(exchange));
f.get();
}
@Override
public boolean process(final Exchange exchange, final AsyncCallback callback) {
try {
executor.submit(new RunCommand(exchange, callback));
} catch (Throwable t) {
exchange.setException(t);
callback.done(true);
return true;
}
return false;
}
protected void resetClient() {
closeClient();
initClient();
}
protected void closeClient() {
if (client != null) {
client.close();
}
}
protected void initClient() {
this.client = getEndpoint().getConnection().newWritingClient();
}
@Override
protected void doStart() throws Exception {
super.doStart();
executor = getEndpoint().getCamelContext().getExecutorServiceManager().newSingleThreadExecutor(this, "Beanstalk-Producer");
executor.execute(new Runnable() {
public void run() {
initClient();
}
});
}
@Override
protected void doStop() throws Exception {
getEndpoint().getCamelContext().getExecutorServiceManager().shutdown(executor);
closeClient();
super.doStop();
}
@Override
public BeanstalkEndpoint getEndpoint() {
return (BeanstalkEndpoint) super.getEndpoint();
}
class RunCommand implements Runnable {
private final Exchange exchange;
private final AsyncCallback callback;
public RunCommand(final Exchange exchange) {
this(exchange, null);
}
public RunCommand(final Exchange exchange, final AsyncCallback callback) {
this.exchange = exchange;
this.callback = callback;
}
@Override
public void run() {
try {
try {
command.act(client, exchange);
} catch (BeanstalkException e) {
/* Retry one time */
resetClient();
command.act(client, exchange);
}
} catch (Throwable t) {
exchange.setException(t);
} finally {
if (callback != null) {
callback.done(false);
}
}
}
}
}