| /* |
| * |
| * 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. |
| * |
| */ |
| |
| package org.apache.qpid.proton.example.reactor; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.Pipe.SourceChannel; |
| |
| import org.apache.qpid.proton.Proton; |
| import org.apache.qpid.proton.engine.BaseHandler; |
| import org.apache.qpid.proton.engine.Event; |
| import org.apache.qpid.proton.reactor.Reactor; |
| import org.apache.qpid.proton.reactor.Selectable; |
| |
| public class Echo extends BaseHandler { |
| |
| private class EchoHandler extends BaseHandler { |
| @Override |
| public void onSelectableInit(Event event) { |
| Selectable selectable = event.getSelectable(); |
| // We can configure a selectable with any SelectableChannel we want. |
| selectable.setChannel(channel); |
| // Ask to be notified when the channel is readable |
| selectable.setReading(true); |
| event.getReactor().update(selectable); |
| } |
| |
| @Override |
| public void onSelectableReadable(Event event) { |
| Selectable selectable = event.getSelectable(); |
| |
| // The onSelectableReadable event tells us that there is data |
| // to be read, or the end of stream has been reached. |
| SourceChannel channel = (SourceChannel)selectable.getChannel(); |
| ByteBuffer buffer = ByteBuffer.allocate(1024); |
| try { |
| while(true) { |
| int amount = channel.read(buffer); |
| if (amount < 0) { |
| selectable.terminate(); |
| selectable.getReactor().update(selectable); |
| } |
| if (amount <= 0) break; |
| System.out.write(buffer.array(), 0, buffer.position()); |
| buffer.clear(); |
| } |
| } catch(IOException ioException) { |
| ioException.printStackTrace(); |
| selectable.terminate(); |
| selectable.getReactor().update(selectable); |
| } |
| } |
| } |
| |
| private final SourceChannel channel; |
| |
| private Echo(SourceChannel channel) { |
| this.channel = channel; |
| } |
| |
| @Override |
| public void onReactorInit(Event event) { |
| // Every selectable is a possible source of future events. Our |
| // selectable stays alive until it reads the end of stream |
| // marker. This will keep the whole reactor running until we |
| // type Control-D. |
| System.out.println("Type whatever you want and then use Control-D to exit:"); |
| Reactor reactor = event.getReactor(); |
| Selectable selectable = reactor.selectable(); |
| setHandler(selectable, new EchoHandler()); |
| reactor.update(selectable); |
| } |
| |
| public static void main(String[] args) throws IOException { |
| SourceChannel inChannel = EchoInputStreamWrapper.wrap(System.in); |
| Reactor reactor = Proton.reactor(new Echo(inChannel)); |
| reactor.run(); |
| } |
| } |