/**
* 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.jetty;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.apache.camel.AsyncCallback;
import org.apache.camel.CamelExchangeException;
import org.apache.camel.Exchange;
import org.apache.camel.ExchangeTimedOutException;
import org.apache.camel.util.IOHelper;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.jetty.client.ContentExchange;
import org.eclipse.jetty.client.HttpClient;
import org.eclipse.jetty.client.HttpExchange;
import org.eclipse.jetty.http.HttpHeaders;
import org.eclipse.jetty.io.Buffer;
/**
* Jetty specific exchange which keeps track of the the request and response.
*
* @version $Revision: 955298 $
*/
public class JettyContentExchange extends ContentExchange {
// TODO: Use the AsyncCallback API (CAMEL-2723)
private static final transient Log LOG = LogFactory.getLog(JettyContentExchange.class);
private final Map<String, String> headers = new LinkedHashMap<String, String>();
private volatile Exchange exchange;
private volatile AsyncCallback callback;
private volatile JettyHttpBinding jettyBinding;
private volatile HttpClient client;
private final CountDownLatch done = new CountDownLatch(1);
public JettyContentExchange(Exchange exchange, JettyHttpBinding jettyBinding, HttpClient client) {
super(true); // keep headers by default
this.exchange = exchange;
this.jettyBinding = jettyBinding;
this.client = client;
}
public void setCallback(AsyncCallback callback) {
this.callback = callback;
}
@Override
protected void onResponseHeader(Buffer name, Buffer value) throws IOException {
super.onResponseHeader(name, value);
headers.put(name.toString(), value.toString());
}
@Override
protected void onRequestComplete() throws IOException {
// close the input stream when its not needed anymore
InputStream is = getRequestContentSource();
if (is != null) {
IOHelper.close(is, "RequestContentSource", LOG);
}
}
@Override
protected void onResponseComplete() throws IOException {
try {
super.onResponseComplete();
} finally {
doTaskCompleted();
}
}
@Override
protected void onExpire() {
try {
super.onExpire();
} finally {
doTaskCompleted();
}
}
@Override
protected void onException(Throwable ex) {
try {
super.onException(ex);
} finally {
doTaskCompleted(ex);
}
}
@Override
protected void onConnectionFailed(Throwable ex) {
try {
super.onConnectionFailed(ex);
} finally {
doTaskCompleted(ex);
}
}
protected int waitForDoneOrFailure() throws InterruptedException {
// just wait a little longer than Jetty itself to be safe
// as this timeout is a failsafe in case for some reason Jetty does not callback
long timeout = client.getTimeout() + 5000;
if (LOG.isTraceEnabled()) {
LOG.trace("Waiting for done or failure with timeout: " + timeout);
}
done.await(timeout, TimeUnit.MILLISECONDS);
return getStatus();
}
public Map<String, String> getHeaders() {
return headers;
}
public String getBody() throws UnsupportedEncodingException {
return super.getResponseContent();
}
public String getUrl() {
String params = getRequestFields().getStringField(HttpHeaders.CONTENT_ENCODING);
return getScheme() + "//" + getAddress().toString() + getURI() + (params != null ? "?" + params : "");
}
protected void doTaskCompleted() {
// make sure to lower the latch
done.countDown();
if (callback == null) {
// this is only for the async callback
return;
}
int exchangeState = getStatus();
if (LOG.isDebugEnabled()) {
LOG.debug("TaskComplete with state " + exchangeState + " for url: " + getUrl());
}
try {
if (exchangeState == HttpExchange.STATUS_COMPLETED) {
// process the response as the state is ok
try {
jettyBinding.populateResponse(exchange, this);
} catch (Exception e) {
exchange.setException(e);
}
} else if (exchangeState == HttpExchange.STATUS_EXPIRED) {
// we did timeout
exchange.setException(new ExchangeTimedOutException(exchange, client.getTimeout()));
} else {
// some kind of other error
if (exchange.getException() != null) {
exchange.setException(new CamelExchangeException("JettyClient failed with state " + exchangeState, exchange));
}
}
} finally {
// now invoke callback to indicate we are done async
callback.done(false);
}
}
protected void doTaskCompleted(Throwable ex) {
try {
// some kind of other error
exchange.setException(new CamelExchangeException("JettyClient failed cause by: " + ex.getMessage(), exchange, ex));
} finally {
// make sure to lower the latch
done.countDown();
}
if (callback != null) {
// now invoke callback to indicate we are done async
callback.done(false);
}
}
}