/*
* Copyright 2013 the original author or authors.
*
* 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 ratpack.server.internal;
import com.google.common.base.Throwables;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.util.ResourceLeakDetector;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import ratpack.file.BaseDirRequiredException;
import ratpack.func.Function;
import ratpack.launch.LaunchConfig;
import ratpack.launch.LaunchException;
import ratpack.server.RatpackServer;
import ratpack.server.Stopper;
import java.net.InetSocketAddress;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import static ratpack.util.ExceptionUtils.uncheck;
public class NettyRatpackServer implements RatpackServer {
private final Logger logger = LoggerFactory.getLogger(getClass().getName());
private final LaunchConfig launchConfig;
private final Function<Stopper, ChannelInitializer<SocketChannel>> channelInitializerTransformer;
private InetSocketAddress boundAddress;
private Channel channel;
private final Lock lifecycleLock = new ReentrantLock();
private final AtomicBoolean running = new AtomicBoolean();
public NettyRatpackServer(LaunchConfig launchConfig, Function<Stopper, ChannelInitializer<SocketChannel>> channelInitializerTransformer) {
this.launchConfig = launchConfig;
this.channelInitializerTransformer = channelInitializerTransformer;
}
@Override
public LaunchConfig getLaunchConfig() {
return launchConfig;
}
@Override
public void start() throws LaunchException {
lifecycleLock.lock();
try {
if (isRunning()) {
return;
}
Stopper stopper = () -> {
try {
NettyRatpackServer.this.stop();
} catch (Exception e) {
throw uncheck(e);
}
};
ServerBootstrap bootstrap = new ServerBootstrap();
ChannelInitializer<SocketChannel> channelInitializer = channelInitializerTransformer.apply(stopper);
bootstrap
.group(launchConfig.getExecController().getEventLoopGroup())
.childHandler(channelInitializer)
.channel(NioServerSocketChannel.class)
.childOption(ChannelOption.ALLOCATOR, launchConfig.getBufferAllocator());
if (System.getProperty("io.netty.leakDetectionLevel", null) == null) {
ResourceLeakDetector.setLevel(ResourceLeakDetector.Level.DISABLED);
}
channel = bootstrap.bind(buildSocketAddress()).sync().channel();
boundAddress = (InetSocketAddress) channel.localAddress();
if (logger.isInfoEnabled()) {
logger.info(String.format("Ratpack started for http://%s:%s", getBindHost(), getBindPort()));
}
running.set(true);
} catch (Exception e) {
Throwables.propagateIfInstanceOf(e, BaseDirRequiredException.class);
Throwables.propagateIfInstanceOf(e, LaunchException.class);
throw new LaunchException("Unable to launch due to exception", e);
} finally {
lifecycleLock.unlock();
}
}
@Override
public void stop() throws Exception {
lifecycleLock.lock();
try {
if (!isRunning()) {
return;
}
channel.close();
partialShutdown();
running.set(false);
} finally {
lifecycleLock.unlock();
}
}
@Override
public boolean isRunning() {
return running.get();
}
private void partialShutdown() throws Exception {
launchConfig.getExecController().close();
}
@Override
public String getScheme() {
return launchConfig.getSSLContext() == null ? "http" : "https";
}
public int getBindPort() {
return boundAddress == null ? -1 : boundAddress.getPort();
}
public String getBindHost() {
if (boundAddress == null) {
return null;
} else {
return InetSocketAddressBackedBindAddress.determineHost(boundAddress);
}
}
private InetSocketAddress buildSocketAddress() {
return (launchConfig.getAddress() == null) ? new InetSocketAddress(launchConfig.getPort()) : new InetSocketAddress(launchConfig.getAddress(), launchConfig.getPort());
}
}