/*
* $Id: HttpClientMessageRequester.java 19191 2010-08-25 21:05:23Z tcarlson $
* --------------------------------------------------------------------------------------
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
*
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.transport.http;
import org.mule.api.MuleMessage;
import org.mule.api.endpoint.InboundEndpoint;
import org.mule.api.transformer.Transformer;
import org.mule.api.transport.ReceiveException;
import org.mule.transport.AbstractMessageRequester;
import org.mule.transport.http.i18n.HttpMessages;
import org.mule.transport.http.transformers.HttpClientMethodResponseToObject;
import org.mule.util.StringUtils;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
/**
* Rquests Mule events over HTTP.
*/
public class HttpClientMessageRequester extends AbstractMessageRequester
{
protected final HttpConnector connector;
protected volatile HttpClient client = null;
protected final Transformer receiveTransformer;
public HttpClientMessageRequester(InboundEndpoint endpoint)
{
super(endpoint);
this.connector = (HttpConnector) endpoint.getConnector();
this.receiveTransformer = new HttpClientMethodResponseToObject();
this.receiveTransformer.setMuleContext(connector.getMuleContext());
}
protected void doConnect() throws Exception
{
if (client == null)
{
client = connector.doClientConnect();
}
}
protected void doDisconnect() throws Exception
{
client = null;
}
/**
* Make a specific request to the underlying transport
*
* @param timeout the maximum time the operation should block before returning.
* The call should return immediately if there is data available. If
* no data becomes available before the timeout elapses, null will be
* returned
* @return the result of the request wrapped in a MuleMessage object. Null will be
* returned if no data was avaialable
* @throws Exception if the call to the underlying protocal cuases an exception
*/
protected MuleMessage doRequest(long timeout) throws Exception
{
HttpMethod httpMethod = new GetMethod(endpoint.getEndpointURI().getAddress());
connector.setupClientAuthorization(null, httpMethod, client, endpoint);
boolean releaseConn = false;
try
{
HttpClient client = new HttpClient();
client.executeMethod(httpMethod);
if (httpMethod.getStatusCode() == HttpStatus.SC_OK)
{
MuleMessage res = (MuleMessage) receiveTransformer.transform(httpMethod);
if (StringUtils.EMPTY.equals(res.getPayload()))
{
releaseConn = true;
}
return res;
}
else
{
releaseConn = true;
throw new ReceiveException(
HttpMessages.requestFailedWithStatus(httpMethod.getStatusLine().toString()),
endpoint, timeout);
}
}
catch (ReceiveException e)
{
releaseConn = true;
throw e;
}
catch (Exception e)
{
releaseConn = true;
throw new ReceiveException(endpoint, timeout, e);
}
finally
{
if (releaseConn)
{
httpMethod.releaseConnection();
}
}
}
protected void doDispose()
{
// template method
}
}