ratpack.server.RatpackServerBuilder Maven / Gradle / Ivy
/*
* 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;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.socket.SocketChannel;
import ratpack.handling.Handler;
import ratpack.handling.internal.FactoryHandler;
import ratpack.launch.HandlerFactory;
import ratpack.launch.LaunchConfig;
import ratpack.launch.LaunchException;
import ratpack.launch.internal.LaunchConfigInternal;
import ratpack.reload.internal.ClassUtil;
import ratpack.reload.internal.ReloadableFileBackedFactory;
import ratpack.server.internal.NettyRatpackServer;
import ratpack.server.internal.RatpackChannelInitializer;
import ratpack.func.Factory;
import ratpack.func.Transformer;
import java.io.File;
import java.nio.file.Path;
/**
* Builds a {@link RatpackServer}.
*/
public abstract class RatpackServerBuilder {
private RatpackServerBuilder() {
}
/**
* Constructs a new server based on the builder's state.
*
* The returned server has not been started.
*
* @param launchConfig The server's configuration
* @return A new, not yet started, Ratpack server.
*/
public static RatpackServer build(LaunchConfig launchConfig) {
Transformer> channelInitializer = buildChannelInitializer(launchConfig);
LaunchConfigInternal launchConfigInternal = (LaunchConfigInternal) launchConfig;
return new NettyRatpackServer(launchConfigInternal, channelInitializer);
}
private static Transformer> buildChannelInitializer(final LaunchConfig launchConfig) {
return new Transformer>() {
@Override
public ChannelInitializer transform(Stopper stopper) {
return new RatpackChannelInitializer(launchConfig, createHandler(launchConfig), stopper);
}
};
}
private static Handler createHandler(final LaunchConfig launchConfig) {
final HandlerFactory handlerFactory = launchConfig.getHandlerFactory();
if (launchConfig.isReloadable()) {
File classFile = ClassUtil.getClassFile(handlerFactory);
if (classFile != null) {
Factory factory = new ReloadableFileBackedFactory<>(classFile.toPath(), true, new ReloadableFileBackedFactory.Producer() {
@Override
public Handler produce(Path file, ByteBuf bytes) {
return createHandler(launchConfig, handlerFactory);
}
});
return new FactoryHandler(factory);
}
}
return createHandler(launchConfig, handlerFactory);
}
private static Handler createHandler(LaunchConfig launchConfig, HandlerFactory handlerFactory) {
try {
return handlerFactory.create(launchConfig);
} catch (Exception e) {
throw new LaunchException("Could not create handler via handler factory: " + handlerFactory.getClass().getName(), e);
}
}
}