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com.signalfx.shaded.jetty.client.ResponseNotifier Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995-2019 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package com.signalfx.shaded.jetty.client;
import java.nio.ByteBuffer;
import java.util.Iterator;
import java.util.List;
import java.util.function.LongConsumer;
import java.util.function.ObjLongConsumer;
import java.util.stream.Collectors;
import com.signalfx.shaded.jetty.client.api.ContentResponse;
import com.signalfx.shaded.jetty.client.api.Request;
import com.signalfx.shaded.jetty.client.api.Response;
import com.signalfx.shaded.jetty.client.api.Result;
import com.signalfx.shaded.jetty.http.HttpField;
import com.signalfx.shaded.jetty.util.Callback;
import com.signalfx.shaded.jetty.util.CountingCallback;
import com.signalfx.shaded.jetty.util.log.Log;
import com.signalfx.shaded.jetty.util.log.Logger;
public class ResponseNotifier
{
private static final Logger LOG = Log.getLogger(ResponseNotifier.class);
public void notifyBegin(List listeners, Response response)
{
for (Response.ResponseListener listener : listeners)
{
if (listener instanceof Response.BeginListener)
notifyBegin((Response.BeginListener)listener, response);
}
}
private void notifyBegin(Response.BeginListener listener, Response response)
{
try
{
listener.onBegin(response);
}
catch (Throwable x)
{
LOG.info("Exception while notifying listener " + listener, x);
}
}
public boolean notifyHeader(List listeners, Response response, HttpField field)
{
boolean result = true;
for (Response.ResponseListener listener : listeners)
{
if (listener instanceof Response.HeaderListener)
result &= notifyHeader((Response.HeaderListener)listener, response, field);
}
return result;
}
private boolean notifyHeader(Response.HeaderListener listener, Response response, HttpField field)
{
try
{
return listener.onHeader(response, field);
}
catch (Throwable x)
{
LOG.info("Exception while notifying listener " + listener, x);
return false;
}
}
public void notifyHeaders(List listeners, Response response)
{
for (Response.ResponseListener listener : listeners)
{
if (listener instanceof Response.HeadersListener)
notifyHeaders((Response.HeadersListener)listener, response);
}
}
private void notifyHeaders(Response.HeadersListener listener, Response response)
{
try
{
listener.onHeaders(response);
}
catch (Throwable x)
{
LOG.info("Exception while notifying listener " + listener, x);
}
}
public void notifyBeforeContent(Response response, ObjLongConsumer demand, List contentListeners)
{
for (Response.DemandedContentListener listener : contentListeners)
{
notifyBeforeContent(listener, response, d -> demand.accept(listener, d));
}
}
private void notifyBeforeContent(Response.DemandedContentListener listener, Response response, LongConsumer demand)
{
try
{
listener.onBeforeContent(response, demand);
}
catch (Throwable x)
{
LOG.info("Exception while notifying listener " + listener, x);
}
}
public void notifyContent(Response response, ObjLongConsumer demand, ByteBuffer buffer, Callback callback, List contentListeners)
{
int count = contentListeners.size();
if (count == 0)
{
callback.succeeded();
demand.accept(null, 1);
}
else if (count == 1)
{
Response.DemandedContentListener listener = contentListeners.get(0);
notifyContent(listener, response, d -> demand.accept(listener, d), buffer.slice(), callback);
}
else
{
callback = new CountingCallback(callback, count);
for (Response.DemandedContentListener listener : contentListeners)
{
notifyContent(listener, response, d -> demand.accept(listener, d), buffer.slice(), callback);
}
}
}
private void notifyContent(Response.DemandedContentListener listener, Response response, LongConsumer demand, ByteBuffer buffer, Callback callback)
{
try
{
listener.onContent(response, demand, buffer, callback);
}
catch (Throwable x)
{
LOG.info("Exception while notifying listener " + listener, x);
}
}
public void notifySuccess(List listeners, Response response)
{
for (Response.ResponseListener listener : listeners)
{
if (listener instanceof Response.SuccessListener)
notifySuccess((Response.SuccessListener)listener, response);
}
}
private void notifySuccess(Response.SuccessListener listener, Response response)
{
try
{
listener.onSuccess(response);
}
catch (Throwable x)
{
LOG.info("Exception while notifying listener " + listener, x);
}
}
public void notifyFailure(List listeners, Response response, Throwable failure)
{
for (Response.ResponseListener listener : listeners)
{
if (listener instanceof Response.FailureListener)
notifyFailure((Response.FailureListener)listener, response, failure);
}
}
private void notifyFailure(Response.FailureListener listener, Response response, Throwable failure)
{
try
{
listener.onFailure(response, failure);
}
catch (Throwable x)
{
LOG.info("Exception while notifying listener " + listener, x);
}
}
public void notifyComplete(List listeners, Result result)
{
for (Response.ResponseListener listener : listeners)
{
if (listener instanceof Response.CompleteListener)
notifyComplete((Response.CompleteListener)listener, result);
}
}
private void notifyComplete(Response.CompleteListener listener, Result result)
{
try
{
listener.onComplete(result);
}
catch (Throwable x)
{
LOG.info("Exception while notifying listener " + listener, x);
}
}
public void forwardSuccess(List listeners, Response response)
{
forwardEvents(listeners, response);
notifySuccess(listeners, response);
}
public void forwardSuccessComplete(List listeners, Request request, Response response)
{
forwardSuccess(listeners, response);
notifyComplete(listeners, new Result(request, response));
}
public void forwardFailure(List listeners, Response response, Throwable failure)
{
forwardEvents(listeners, response);
notifyFailure(listeners, response, failure);
}
private void forwardEvents(List listeners, Response response)
{
notifyBegin(listeners, response);
Iterator iterator = response.getHeaders().iterator();
while (iterator.hasNext())
{
HttpField field = iterator.next();
if (!notifyHeader(listeners, response, field))
iterator.remove();
}
notifyHeaders(listeners, response);
if (response instanceof ContentResponse)
{
byte[] content = ((ContentResponse)response).getContent();
if (content != null && content.length > 0)
{
List contentListeners = listeners.stream()
.filter(Response.DemandedContentListener.class::isInstance)
.map(Response.DemandedContentListener.class::cast)
.collect(Collectors.toList());
ObjLongConsumer demand = (context, value) -> {};
notifyBeforeContent(response, demand, contentListeners);
notifyContent(response, demand, ByteBuffer.wrap(content), Callback.NOOP, contentListeners);
}
}
}
public void forwardFailureComplete(List listeners, Request request, Throwable requestFailure, Response response, Throwable responseFailure)
{
forwardFailure(listeners, response, responseFailure);
notifyComplete(listeners, new Result(request, requestFailure, response, responseFailure));
}
}
