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Async Http Client library purpose is to allow Java applications to easily execute HTTP requests and
asynchronously process the HTTP responses.
/*
* Copyright (c) 2012-2015 Sonatype, Inc. All rights reserved.
*
* This program is licensed to you under the Apache License Version 2.0,
* and you may not use this file except in compliance with the Apache License Version 2.0.
* You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the Apache License Version 2.0 is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
*/
package com.ning.http.client.providers.grizzly;
import org.glassfish.grizzly.CompletionHandler;
import org.glassfish.grizzly.Connection;
import org.glassfish.grizzly.WriteResult;
import org.glassfish.grizzly.asyncqueue.AsyncQueueWriter;
import org.glassfish.grizzly.filterchain.FilterChainBuilder;
import org.glassfish.grizzly.filterchain.FilterChainContext;
import org.glassfish.grizzly.filterchain.TransportFilter;
import org.glassfish.grizzly.http.ContentEncoding;
import org.glassfish.grizzly.http.EncodingFilter;
import org.glassfish.grizzly.http.GZipContentEncoding;
import org.glassfish.grizzly.http.HttpHeader;
import org.glassfish.grizzly.http.HttpResponsePacket;
import org.glassfish.grizzly.http.util.DataChunk;
import org.glassfish.grizzly.http.util.Header;
import org.glassfish.grizzly.nio.RoundRobinConnectionDistributor;
import org.glassfish.grizzly.nio.transport.TCPNIOTransport;
import org.glassfish.grizzly.nio.transport.TCPNIOTransportBuilder;
import org.glassfish.grizzly.ssl.SSLEngineConfigurator;
import org.glassfish.grizzly.strategies.SameThreadIOStrategy;
import org.glassfish.grizzly.strategies.WorkerThreadIOStrategy;
import org.glassfish.grizzly.threadpool.ThreadPoolConfig;
import org.glassfish.grizzly.utils.DelayedExecutor;
import org.glassfish.grizzly.utils.IdleTimeoutFilter;
import org.glassfish.grizzly.websockets.WebSocketFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.ning.http.client.AsyncHandler;
import com.ning.http.client.AsyncHttpClient;
import com.ning.http.client.AsyncHttpClientConfig;
import com.ning.http.client.AsyncHttpProvider;
import com.ning.http.client.ListenableFuture;
import com.ning.http.client.Request;
import com.ning.http.client.SSLEngineFactory;
import javax.net.ssl.SSLContext;
import java.io.IOException;
import java.security.SecureRandom;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import static com.ning.http.client.providers.grizzly.GrizzlyAsyncHttpProviderConfig.Property.*;
/**
* A Grizzly 2.0-based implementation of {@link AsyncHttpProvider}.
*
* @author The Grizzly Team
* @since 1.7.0
*/
public class GrizzlyAsyncHttpProvider implements AsyncHttpProvider {
private final static Logger LOGGER = LoggerFactory.getLogger(GrizzlyAsyncHttpProvider.class);
private final TCPNIOTransport clientTransport;
private final AsyncHttpClientConfig clientConfig;
private final GrizzlyAsyncHttpProviderConfig providerConfig;
private final ConnectionManager connectionManager;
DelayedExecutor.Resolver resolver;
private DelayedExecutor timeoutExecutor;
// ------------------------------------------------------------ Constructors
public GrizzlyAsyncHttpProvider(final AsyncHttpClientConfig clientConfig) {
this.clientConfig = clientConfig;
this.providerConfig =
clientConfig.getAsyncHttpProviderConfig() instanceof GrizzlyAsyncHttpProviderConfig ?
(GrizzlyAsyncHttpProviderConfig) clientConfig.getAsyncHttpProviderConfig()
: new GrizzlyAsyncHttpProviderConfig();
final TCPNIOTransportBuilder builder = TCPNIOTransportBuilder.newInstance();
clientTransport = builder.build();
initializeTransport(clientConfig);
connectionManager = new ConnectionManager(this, clientTransport, providerConfig);
try {
clientTransport.start();
} catch (IOException ioe) {
throw new RuntimeException(ioe);
}
}
AsyncHttpClientConfig getClientConfig() {
return clientConfig;
}
ConnectionManager getConnectionManager() {
return connectionManager;
}
// ------------------------------------------ Methods from AsyncHttpProvider
@Override
public ListenableFuture execute(final Request request,
final AsyncHandler asyncHandler) {
if (clientTransport.isStopped()) {
IOException e = new IOException("AsyncHttpClient has been closed.");
asyncHandler.onThrowable(e);
return new ListenableFuture.CompletedFailure<>(e);
}
final GrizzlyResponseFuture future =
new GrizzlyResponseFuture(asyncHandler);
final CompletionHandler connectHandler =
new CompletionHandler() {
@Override
public void cancelled() {
future.cancel(true);
}
@Override
public void failed(final Throwable throwable) {
future.abort(throwable);
}
@Override
public void completed(final Connection c) {
try {
final HttpTransactionContext tx =
HttpTransactionContext.startTransaction(c,
GrizzlyAsyncHttpProvider.this, request,
future);
if (future.setHttpTransactionCtx(tx)) {
execute(tx);
} else {
// GrizzlyResponseFuture has been already completed (canceled?)
tx.closeConnection();
}
} catch (Exception e) {
if (e instanceof RuntimeException) {
failed(e);
} else if (e instanceof IOException) {
failed(e);
}
if (LOGGER.isWarnEnabled()) {
LOGGER.warn(e.toString(), e);
}
}
}
@Override
public void updated(final Connection c) {
// no-op
}
};
try {
connectionManager.openAsync(request, connectHandler);
} catch (IOException ioe) {
abort(future, ioe);
} catch (RuntimeException re) {
abort(future, re);
} catch (Exception e) {
if (LOGGER.isWarnEnabled()) {
LOGGER.warn(e.toString(), e);
}
abort(future, e);
}
return future;
}
private void abort(GrizzlyResponseFuture future, Throwable t) {
if (!future.isDone()) {
LOGGER.debug("Aborting Future {}\n", future);
LOGGER.debug(t.getMessage(), t);
future.abort(t);
}
}
@Override
public void close() {
try {
connectionManager.destroy();
clientTransport.shutdownNow();
final ExecutorService service = clientConfig.executorService();
if (service != null) {
service.shutdown();
}
if (timeoutExecutor != null) {
timeoutExecutor.stop();
timeoutExecutor.getThreadPool().shutdownNow();
}
} catch (IOException ignored) { }
}
// ------------------------------------------------------- Protected Methods
@SuppressWarnings({"unchecked"})
void execute(final HttpTransactionContext transactionCtx)
throws IOException {
try {
transactionCtx.getConnection().write(transactionCtx,
createWriteCompletionHandler(transactionCtx.future));
} catch (Exception e) {
if (e instanceof RuntimeException) {
throw (RuntimeException) e;
} else if (e instanceof IOException) {
throw (IOException) e;
}
if (LOGGER.isWarnEnabled()) {
LOGGER.warn(e.toString(), e);
}
}
}
protected void initializeTransport(final AsyncHttpClientConfig clientConfig) {
final FilterChainBuilder fcb = FilterChainBuilder.stateless();
fcb.add(new TransportFilter());
final int timeout = clientConfig.getRequestTimeout();
if (timeout > 0) {
int delay = 500;
if (timeout < delay) {
delay = timeout - 10;
}
timeoutExecutor = IdleTimeoutFilter.createDefaultIdleDelayedExecutor(delay, TimeUnit.MILLISECONDS);
timeoutExecutor.start();
final IdleTimeoutFilter.TimeoutResolver timeoutResolver =
new IdleTimeoutFilter.TimeoutResolver() {
@Override
public long getTimeout(final FilterChainContext ctx) {
final HttpTransactionContext context
= HttpTransactionContext.currentTransaction(ctx.getConnection());
if (context != null) {
if (context.isWSRequest) {
return clientConfig.getWebSocketTimeout();
}
final long timeout = context.getAhcRequest().getRequestTimeout();
if (timeout > 0) {
return timeout;
}
}
return timeout;
}
};
final IdleTimeoutFilter timeoutFilter = new IdleTimeoutFilter(timeoutExecutor,
timeoutResolver,
new IdleTimeoutFilter.TimeoutHandler() {
public void onTimeout(Connection connection) {
timeout(connection);
}
});
fcb.add(timeoutFilter);
resolver = timeoutFilter.getResolver();
}
final boolean defaultSecState = (clientConfig.getSSLContext() != null);
final SSLEngineConfigurator configurator
= new AhcSSLEngineConfigurator(
providerConfig.getSslEngineFactory() != null
? providerConfig.getSslEngineFactory()
: new SSLEngineFactory.DefaultSSLEngineFactory(clientConfig));
final SwitchingSSLFilter sslFilter =
new SwitchingSSLFilter(configurator, defaultSecState);
fcb.add(sslFilter);
final AhcEventFilter eventFilter = new
AhcEventFilter(this,
(Integer) providerConfig.getProperty(MAX_HTTP_PACKET_HEADER_SIZE));
final AsyncHttpClientFilter clientFilter = new AsyncHttpClientFilter(this);
ContentEncoding[] encodings = eventFilter.getContentEncodings();
if (encodings.length > 0) {
for (ContentEncoding encoding : encodings) {
eventFilter.removeContentEncoding(encoding);
}
}
if ((Boolean) providerConfig.getProperty(DECOMPRESS_RESPONSE)) {
eventFilter.addContentEncoding(
new GZipContentEncoding(512,
512,
new ClientEncodingFilter()));
}
fcb.add(eventFilter);
fcb.add(clientFilter);
clientTransport.getAsyncQueueIO().getWriter()
.setMaxPendingBytesPerConnection(AsyncQueueWriter.AUTO_SIZE);
clientTransport.setNIOChannelDistributor(
new RoundRobinConnectionDistributor(clientTransport, false, false));
final int kernelThreadsCount =
clientConfig.getIoThreadMultiplier() *
Runtime.getRuntime().availableProcessors();
clientTransport.setSelectorRunnersCount(kernelThreadsCount);
clientTransport.setKernelThreadPoolConfig(
ThreadPoolConfig.defaultConfig()
.setCorePoolSize(kernelThreadsCount)
.setMaxPoolSize(kernelThreadsCount)
.setPoolName("grizzly-ahc-kernel")
// .setPoolName(discoverTestName("grizzly-ahc-kernel")) // uncomment for tests to track down the leaked threads
);
final TransportCustomizer customizer = (TransportCustomizer)
providerConfig.getProperty(TRANSPORT_CUSTOMIZER);
if (customizer != null) {
customizer.customize(clientTransport, fcb);
} else {
doDefaultTransportConfig();
}
fcb.add(new WebSocketFilter());
clientTransport.setProcessor(fcb.build());
}
// ------------------------------------------------- Package Private Methods
void touchConnection(final Connection c, final Request request) {
final long timeOut = request.getRequestTimeout() > 0
? request.getRequestTimeout()
: clientConfig.getRequestTimeout();
if (timeOut > 0) {
if (resolver != null) {
resolver.setTimeoutMillis(c,
System.currentTimeMillis() + timeOut);
}
}
}
// --------------------------------------------------------- Private Methods
private static boolean configSendFileSupport() {
return !((System.getProperty("os.name").equalsIgnoreCase("linux")
&& !linuxSendFileSupported())
|| System.getProperty("os.name").equalsIgnoreCase("HP-UX"));
}
private static boolean linuxSendFileSupported() {
final String version = System.getProperty("java.version");
if (version.startsWith("1.6")) {
int idx = version.indexOf('_');
if (idx == -1) {
return false;
}
final int patchRev = Integer.parseInt(version.substring(idx + 1));
return (patchRev >= 18);
} else {
return version.startsWith("1.7") || version.startsWith("1.8");
}
}
private void doDefaultTransportConfig() {
final ExecutorService service = clientConfig.executorService();
if (service != null) {
clientTransport.setIOStrategy(WorkerThreadIOStrategy.getInstance());
clientTransport.setWorkerThreadPool(service);
} else {
clientTransport.setIOStrategy(SameThreadIOStrategy.getInstance());
}
}
private CompletionHandler createWriteCompletionHandler(
final GrizzlyResponseFuture future) {
return new CompletionHandler() {
public void cancelled() {
future.cancel(true);
}
public void failed(Throwable throwable) {
future.abort(throwable);
}
public void completed(WriteResult result) {
}
public void updated(WriteResult result) {
// no-op
}
};
}
void timeout(final Connection c) {
final HttpTransactionContext tx = HttpTransactionContext.currentTransaction(c);
final TimeoutException te = new TimeoutException("Timeout exceeded");
if (tx != null) {
tx.abort(te);
}
c.closeWithReason(new IOException("Timeout exceeded", te));
}
private static final class ClientEncodingFilter implements EncodingFilter {
// ----------------------------------------- Methods from EncodingFilter
public boolean applyEncoding(HttpHeader httpPacket) {
return false;
}
public boolean applyDecoding(HttpHeader httpPacket) {
final HttpResponsePacket httpResponse = (HttpResponsePacket) httpPacket;
final DataChunk bc = httpResponse.getHeaders().getValue(Header.ContentEncoding);
return bc != null && bc.indexOf("gzip", 0) != -1;
}
} // END ClientContentEncoding
public static void main(String[] args) {
SecureRandom secureRandom = new SecureRandom();
SSLContext sslContext = null;
try {
sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, null, secureRandom);
} catch (Exception e) {
e.printStackTrace();
}
AsyncHttpClientConfig config = new AsyncHttpClientConfig.Builder()
.setConnectTimeout(5000)
.setSSLContext(sslContext).build();
AsyncHttpClient client = new AsyncHttpClient(new GrizzlyAsyncHttpProvider(config), config);
long start = System.currentTimeMillis();
try {
client.executeRequest(client.prepareGet("http://www.google.com").build()).get();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
LOGGER.debug("COMPLETE: " + (System.currentTimeMillis() - start) + "ms");
}
}
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