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Protocol handler for communicating using a servlet / http following the Servlet 2.5/ 2.5/.x spec.
/*
* JBoss, Home of Professional Open Source
* Copyright 2009, Red Hat Middleware LLC, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed 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.jboss.arquillian.protocol.servlet;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.ConnectException;
import java.net.HttpURLConnection;
import java.net.URI;
import java.net.URL;
import java.net.URLConnection;
import java.util.Collection;
import java.util.Timer;
import java.util.TimerTask;
import java.util.logging.Logger;
import org.jboss.arquillian.container.spi.client.protocol.metadata.HTTPContext;
import org.jboss.arquillian.container.test.spi.ContainerMethodExecutor;
import org.jboss.arquillian.container.test.spi.command.Command;
import org.jboss.arquillian.container.test.spi.command.CommandCallback;
import org.jboss.arquillian.test.spi.TestMethodExecutor;
import org.jboss.arquillian.test.spi.TestResult;
/**
* ServletMethodExecutor
*
* @author Aslak Knutsen
* @version $Revision: $
*/
public class ServletMethodExecutor implements ContainerMethodExecutor
{
private static final Logger log = Logger.getLogger(ContainerMethodExecutor.class.getName());
public static final String ARQUILLIAN_SERVLET_NAME = "ArquillianServletRunner";
public static final String ARQUILLIAN_SERVLET_MAPPING = "/" + ARQUILLIAN_SERVLET_NAME;
protected ServletURIHandler uriHandler;
protected CommandCallback callback;
protected ServletProtocolConfiguration config;
protected ServletMethodExecutor() {}
public ServletMethodExecutor(ServletProtocolConfiguration config, Collection contexts, final CommandCallback callback)
{
if(config == null)
{
throw new IllegalArgumentException("ServletProtocolConfiguration must be specified");
}
if (contexts == null || contexts.size() == 0)
{
throw new IllegalArgumentException("HTTPContext must be specified");
}
if (callback == null)
{
throw new IllegalArgumentException("Callback must be specified");
}
this.config = config;
this.uriHandler = new ServletURIHandler(config, contexts);
this.callback = callback;
}
public TestResult invoke(final TestMethodExecutor testMethodExecutor)
{
if (testMethodExecutor == null)
{
throw new IllegalArgumentException("TestMethodExecutor must be specified");
}
URI targetBaseURI = uriHandler.locateTestServlet(testMethodExecutor.getMethod());
Class testClass = testMethodExecutor.getInstance().getClass();
final String url = targetBaseURI.toASCIIString() + ARQUILLIAN_SERVLET_MAPPING
+ "?outputMode=serializedObject&className=" + testClass.getName() + "&methodName="
+ testMethodExecutor.getMethod().getName();
final String eventUrl = targetBaseURI.toASCIIString() + ARQUILLIAN_SERVLET_MAPPING
+ "?outputMode=serializedObject&className=" + testClass.getName() + "&methodName="
+ testMethodExecutor.getMethod().getName() + "&cmd=event";
Timer eventTimer = null;
try
{
eventTimer = createCommandServicePullTimer(eventUrl);
return executeWithRetry(url, TestResult.class);
}
catch (Exception e)
{
throw new IllegalStateException("Error launching test " + testClass.getName() + " "
+ testMethodExecutor.getMethod(), e);
}
finally
{
if (eventTimer != null)
{
eventTimer.cancel();
}
}
}
protected T executeWithRetry(String url, Class type) throws Exception
{
long timeoutTime = System.currentTimeMillis() + 1000;
boolean interrupted = false;
while (timeoutTime > System.currentTimeMillis())
{
T o = execute(url, type, null);
if (o != null)
{
return o;
}
try
{
Thread.sleep(200);
}
catch (InterruptedException e)
{
interrupted = true;
}
}
if (interrupted)
{
Thread.currentThread().interrupt();
}
throw new IllegalStateException("Error launching request at " + url + ". No result returned");
}
protected T execute(String url, Class returnType, Object requestObject) throws Exception
{
URLConnection connection = new URL(url).openConnection();
if (!(connection instanceof HttpURLConnection))
{
throw new IllegalStateException("Not an http connection! " + connection);
}
HttpURLConnection httpConnection = (HttpURLConnection) connection;
httpConnection.setUseCaches(false);
httpConnection.setDefaultUseCaches(false);
httpConnection.setDoInput(true);
prepareHttpConnection(httpConnection);
try
{
if(requestObject != null)
{
httpConnection.setRequestMethod("POST");
httpConnection.setDoOutput(true);
httpConnection.setRequestProperty("Content-Type", "application/octet-stream");
}
if(requestObject != null)
{
ObjectOutputStream ous = new ObjectOutputStream(httpConnection.getOutputStream());
try
{
ous.writeObject(requestObject);
}
catch (Exception e)
{
throw new RuntimeException("Error sending request Object, " + requestObject, e);
}
finally
{
ous.flush();
ous.close();
}
}
try
{
httpConnection.getResponseCode();
}
catch (ConnectException e)
{
return null; // Could not connect
}
if (httpConnection.getResponseCode() == HttpURLConnection.HTTP_OK)
{
ObjectInputStream ois = new ObjectInputStream(httpConnection.getInputStream());
Object o;
try
{
o = ois.readObject();
}
finally
{
ois.close();
}
if (!returnType.isInstance(o))
{
throw new IllegalStateException("Error reading results, expected a " + returnType.getName() + " but got " + o);
}
return returnType.cast(o);
}
else if(httpConnection.getResponseCode() == HttpURLConnection.HTTP_NO_CONTENT)
{
return null;
}
else if (httpConnection.getResponseCode() != HttpURLConnection.HTTP_NOT_FOUND)
{
throw new IllegalStateException(
"Error launching test at " + url + ". " +
"Got " + httpConnection.getResponseCode() + " ("+ httpConnection.getResponseMessage() + ")");
}
}
finally
{
httpConnection.disconnect();
}
return null;
}
@SuppressWarnings("UnusedParameters")
protected void prepareHttpConnection(HttpURLConnection connection) {
}
protected Timer createCommandServicePullTimer(final String eventUrl)
{
if(config.getPullInMilliSeconds() == null || config.getPullInMilliSeconds() <= 0) {
log.warning("The Servlet Protocol has been configured with a pullInMilliSeconds interval of " +
config.getPullInMilliSeconds() + ". The effect of this is that the Command Service has been disabled." +
" Depending on which features you use, this might cause serious delays. Be on high alert for " +
" possible timeout runtime exceptions.");
return null;
}
Timer eventTimer = new Timer();
eventTimer.schedule(new TimerTask()
{
@Override
public void run()
{
try
{
Object o = execute(eventUrl, Object.class, null);
if (o != null)
{
if (o instanceof Command)
{
Command command = (Command) o;
callback.fired(command);
execute(eventUrl, Object.class, command);
}
else
{
throw new RuntimeException("Recived a non " + Command.class.getName()
+ " object on event channel");
}
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
}, 0, config.getPullInMilliSeconds());
return eventTimer;
}
}
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