/*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.http.impl.bootstrap;
import java.io.IOException;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import javax.net.ServerSocketFactory;
import org.apache.http.ExceptionLogger;
import org.apache.http.HttpConnectionFactory;
import org.apache.http.HttpServerConnection;
import org.apache.http.config.SocketConfig;
import org.apache.http.impl.DefaultBHttpServerConnection;
import org.apache.http.protocol.HttpService;
/**
* @since 4.4
*/
public class HttpServer {
enum Status { READY, ACTIVE, STOPPING }
private final int port;
private final InetAddress ifAddress;
private final SocketConfig socketConfig;
private final ServerSocketFactory serverSocketFactory;
private final HttpService httpService;
private final HttpConnectionFactory<? extends DefaultBHttpServerConnection> connectionFactory;
private final ExceptionLogger exceptionLogger;
private final ExecutorService listenerExecutorService;
private final ThreadGroup workerThreads;
private final ExecutorService workerExecutorService;
private final AtomicReference<Status> status;
private volatile ServerSocket serverSocket;
private volatile RequestListener requestListener;
HttpServer(
final int port,
final InetAddress ifAddress,
final SocketConfig socketConfig,
final ServerSocketFactory serverSocketFactory,
final HttpService httpService,
final HttpConnectionFactory<? extends DefaultBHttpServerConnection> connectionFactory,
final ExceptionLogger exceptionLogger) {
this.port = port;
this.ifAddress = ifAddress;
this.socketConfig = socketConfig;
this.serverSocketFactory = serverSocketFactory;
this.httpService = httpService;
this.connectionFactory = connectionFactory;
this.exceptionLogger = exceptionLogger;
this.listenerExecutorService = Executors.newSingleThreadExecutor(
new ThreadFactoryImpl("HTTP-listener-" + this.port));
this.workerThreads = new ThreadGroup("HTTP-workers");
this.workerExecutorService = Executors.newCachedThreadPool(
new ThreadFactoryImpl("HTTP-worker", this.workerThreads));
this.status = new AtomicReference<Status>(Status.READY);
}
public InetAddress getInetAddress() {
final ServerSocket localSocket = this.serverSocket;
if (localSocket != null) {
return localSocket.getInetAddress();
} else {
return null;
}
}
public int getLocalPort() {
final ServerSocket localSocket = this.serverSocket;
if (localSocket != null) {
return localSocket.getLocalPort();
} else {
return -1;
}
}
public void start() throws IOException {
if (this.status.compareAndSet(Status.READY, Status.ACTIVE)) {
this.serverSocket = this.serverSocketFactory.createServerSocket(
this.port, this.socketConfig.getBacklogSize(), this.ifAddress);
this.serverSocket.setReuseAddress(this.socketConfig.isSoReuseAddress());
if (this.socketConfig.getRcvBufSize() > 0) {
this.serverSocket.setReceiveBufferSize(this.socketConfig.getRcvBufSize());
}
this.requestListener = new RequestListener(
this.socketConfig,
this.serverSocket,
this.httpService,
this.connectionFactory,
this.exceptionLogger,
this.workerExecutorService);
this.listenerExecutorService.execute(this.requestListener);
}
}
public void stop() {
if (this.status.compareAndSet(Status.ACTIVE, Status.STOPPING)) {
final RequestListener local = this.requestListener;
if (local != null) {
try {
local.terminate();
} catch (IOException ex) {
this.exceptionLogger.log(ex);
}
}
this.workerThreads.interrupt();
this.listenerExecutorService.shutdown();
this.workerExecutorService.shutdown();
}
}
public void awaitTermination(final long timeout, final TimeUnit timeUnit) throws InterruptedException {
this.workerExecutorService.awaitTermination(timeout, timeUnit);
}
public void shutdown(final long gracePeriod, final TimeUnit timeUnit) {
stop();
if (gracePeriod > 0) {
try {
awaitTermination(gracePeriod, timeUnit);
} catch (InterruptedException ex) {
Thread.currentThread().interrupt();
}
}
final List<Runnable> runnables = this.workerExecutorService.shutdownNow();
for (Runnable runnable: runnables) {
if (runnable instanceof Worker) {
final Worker worker = (Worker) runnable;
final HttpServerConnection conn = worker.getConnection();
try {
conn.shutdown();
} catch (IOException ex) {
this.exceptionLogger.log(ex);
}
}
}
}
}