package org.jboss.resteasy.plugins.server.vertx;
import io.vertx.core.Context;
import org.jboss.resteasy.core.AbstractAsynchronousResponse;
import org.jboss.resteasy.core.AbstractExecutionContext;
import org.jboss.resteasy.core.SynchronousDispatcher;
import org.jboss.resteasy.plugins.server.BaseHttpRequest;
import org.jboss.resteasy.plugins.server.vertx.i18n.Messages;
import org.jboss.resteasy.specimpl.ResteasyHttpHeaders;
import org.jboss.resteasy.spi.NotImplementedYetException;
import org.jboss.resteasy.spi.ResteasyAsynchronousContext;
import org.jboss.resteasy.spi.ResteasyAsynchronousResponse;
import org.jboss.resteasy.spi.ResteasyUriInfo;
import org.jboss.resteasy.spi.UnhandledException;
import javax.ws.rs.ServiceUnavailableException;
import javax.ws.rs.container.AsyncResponse;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.TimeUnit;
/**
* Abstraction for an inbound http request on the server, or a response from a server to a client
* <p/>
* We have this abstraction so that we can reuse marshalling objects in a client framework and serverside framework
*
* @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
* @author Norman Maurer
* @author Kristoffer Sjogren
* @version $Revision: 1 $
*/
public class VertxHttpRequest extends BaseHttpRequest
{
protected ResteasyHttpHeaders httpHeaders;
protected SynchronousDispatcher dispatcher;
protected String httpMethod;
protected InputStream inputStream;
protected Map<String, Object> attributes = new HashMap<String, Object>();
protected VertxHttpResponse response;
private final boolean is100ContinueExpected;
private VertxExecutionContext executionContext;
private final Context context;
private volatile boolean flushed;
public VertxHttpRequest(Context context, ResteasyHttpHeaders httpHeaders, ResteasyUriInfo uri, String httpMethod, SynchronousDispatcher dispatcher, VertxHttpResponse response, boolean is100ContinueExpected)
{
super(uri);
this.context = context;
this.is100ContinueExpected = is100ContinueExpected;
this.response = response;
this.dispatcher = dispatcher;
this.httpHeaders = httpHeaders;
this.httpMethod = httpMethod;
this.executionContext = new VertxExecutionContext(this, response, dispatcher);
}
@Override
public MultivaluedMap<String, String> getMutableHeaders()
{
return httpHeaders.getMutableHeaders();
}
@Override
public void setHttpMethod(String method)
{
this.httpMethod = method;
}
@Override
public Enumeration<String> getAttributeNames()
{
Enumeration<String> en = new Enumeration<String>()
{
private Iterator<String> it = attributes.keySet().iterator();
@Override
public boolean hasMoreElements()
{
return it.hasNext();
}
@Override
public String nextElement()
{
return it.next();
}
};
return en;
}
@Override
public ResteasyAsynchronousContext getAsyncContext()
{
return executionContext;
}
public boolean isFlushed()
{
return flushed;
}
@Override
public Object getAttribute(String attribute)
{
return attributes.get(attribute);
}
@Override
public void setAttribute(String name, Object value)
{
attributes.put(name, value);
}
@Override
public void removeAttribute(String name)
{
attributes.remove(name);
}
@Override
public HttpHeaders getHttpHeaders()
{
return httpHeaders;
}
@Override
public InputStream getInputStream()
{
return inputStream;
}
@Override
public void setInputStream(InputStream stream)
{
this.inputStream = stream;
}
@Override
public String getHttpMethod()
{
return httpMethod;
}
public VertxHttpResponse getResponse()
{
return response;
}
public boolean is100ContinueExpected()
{
return is100ContinueExpected;
}
@Override
public void forward(String path)
{
throw new NotImplementedYetException();
}
@Override
public boolean wasForwarded()
{
return false;
}
class VertxExecutionContext extends AbstractExecutionContext
{
protected final VertxHttpRequest request;
protected final VertxHttpResponse response;
protected volatile boolean done;
protected volatile boolean cancelled;
protected volatile boolean wasSuspended;
protected VertxHttpAsyncResponse asyncResponse;
public VertxExecutionContext(VertxHttpRequest request, VertxHttpResponse response, SynchronousDispatcher dispatcher)
{
super(dispatcher, request, response);
this.request = request;
this.response = response;
this.asyncResponse = new VertxHttpAsyncResponse(dispatcher, request, response);
}
@Override
public boolean isSuspended()
{
return wasSuspended;
}
@Override
public ResteasyAsynchronousResponse getAsyncResponse()
{
return asyncResponse;
}
@Override
public ResteasyAsynchronousResponse suspend() throws IllegalStateException
{
return suspend(-1);
}
@Override
public ResteasyAsynchronousResponse suspend(long millis) throws IllegalStateException
{
return suspend(millis, TimeUnit.MILLISECONDS);
}
@Override
public ResteasyAsynchronousResponse suspend(long time, TimeUnit unit) throws IllegalStateException
{
if (wasSuspended)
{
throw new IllegalStateException(Messages.MESSAGES.alreadySuspended());
}
wasSuspended = true;
return asyncResponse;
}
/**
* Vertx implementation of {@link AsyncResponse}.
*
* @author Kristoffer Sjogren
*/
class VertxHttpAsyncResponse extends AbstractAsynchronousResponse
{
private final Object responseLock = new Object();
private long timerID = -1;
private VertxHttpResponse vertxResponse;
public VertxHttpAsyncResponse(SynchronousDispatcher dispatcher, VertxHttpRequest request, VertxHttpResponse response)
{
super(dispatcher, request, response);
this.vertxResponse = response;
}
@Override
public void initialRequestThreadFinished()
{
// done
}
@Override
public boolean resume(Object entity)
{
synchronized (responseLock)
{
if (done) return false;
if (cancelled) return false;
try
{
return internalResume(entity);
} finally
{
done = true;
vertxFlush();
}
}
}
@Override
public boolean resume(Throwable ex)
{
synchronized (responseLock)
{
if (done) return false;
if (cancelled) return false;
try
{
return internalResume(ex);
} catch (UnhandledException unhandled)
{
return internalResume(Response.status(500).build());
} finally
{
done = true;
vertxFlush();
}
}
}
@Override
public boolean cancel()
{
synchronized (responseLock)
{
if (cancelled)
{
return true;
}
if (done)
{
return false;
}
done = true;
cancelled = true;
try
{
return internalResume(Response.status(Response.Status.SERVICE_UNAVAILABLE).build());
} finally
{
vertxFlush();
}
}
}
@Override
public boolean cancel(int retryAfter)
{
synchronized (responseLock)
{
if (cancelled) return true;
if (done) return false;
done = true;
cancelled = true;
try
{
return internalResume(Response.status(Response.Status.SERVICE_UNAVAILABLE).header(HttpHeaders.RETRY_AFTER, retryAfter).build());
} finally
{
vertxFlush();
}
}
}
protected synchronized void vertxFlush()
{
flushed = true;
try
{
vertxResponse.finish();
} catch (IOException e)
{
throw new RuntimeException(e);
}
}
@Override
public boolean cancel(Date retryAfter)
{
synchronized (responseLock)
{
if (cancelled) return true;
if (done) return false;
done = true;
cancelled = true;
try
{
return internalResume(Response.status(Response.Status.SERVICE_UNAVAILABLE).header(HttpHeaders.RETRY_AFTER, retryAfter).build());
} finally
{
vertxFlush();
}
}
}
@Override
public boolean isSuspended()
{
return !done && !cancelled;
}
@Override
public boolean isCancelled()
{
return cancelled;
}
@Override
public boolean isDone()
{
return done;
}
@Override
public boolean setTimeout(long time, TimeUnit unit)
{
synchronized (responseLock)
{
if (done || cancelled) return false;
if (timerID > -1 && !context.owner().cancelTimer(timerID))
{
return false;
}
timerID = context.owner().setTimer(unit.toMillis(time), v -> handleTimeout());
}
return true;
}
protected void handleTimeout()
{
if (timeoutHandler != null)
{
timeoutHandler.handleTimeout(this);
}
if (done) return;
resume(new ServiceUnavailableException());
}
}
}
}