/*
* Copyright 2011 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 org.gradle.launcher.daemon.client;
import org.gradle.api.Nullable;
import org.gradle.api.logging.Logger;
import org.gradle.api.logging.Logging;
import org.gradle.internal.concurrent.ExecutorFactory;
import org.gradle.internal.concurrent.Stoppable;
import org.gradle.internal.id.IdGenerator;
import org.gradle.internal.io.TextStream;
import org.gradle.launcher.daemon.protocol.CloseInput;
import org.gradle.launcher.daemon.protocol.ForwardInput;
import org.gradle.launcher.daemon.protocol.IoCommand;
import org.gradle.messaging.dispatch.Dispatch;
import java.io.InputStream;
/**
* Eagerly consumes from an input stream, sending line by line ForwardInput
* commands over the connection and finishing with a CloseInput command.
* It also listens to cancel requests and forwards it too as Cancel command.
*/
public class DaemonClientInputForwarder implements Stoppable {
private static final Logger LOGGER = Logging.getLogger(DaemonClientInputForwarder.class);
public static final int DEFAULT_BUFFER_SIZE = 1024;
private final InputForwarder forwarder;
public DaemonClientInputForwarder(InputStream inputStream, Dispatch<? super IoCommand> dispatch,
ExecutorFactory executorFactory, IdGenerator<?> idGenerator) {
this(inputStream, dispatch, executorFactory, idGenerator, DEFAULT_BUFFER_SIZE);
}
public DaemonClientInputForwarder(InputStream inputStream, Dispatch<? super IoCommand> dispatch,
ExecutorFactory executorFactory, IdGenerator<?> idGenerator, int bufferSize) {
TextStream handler = new ForwardTextStreamToConnection(dispatch, idGenerator);
forwarder = new InputForwarder(inputStream, handler, executorFactory, bufferSize);
}
public void start() {
forwarder.start();
}
public void stop() {
forwarder.stop();
}
private static class ForwardTextStreamToConnection implements TextStream {
private final Dispatch<? super IoCommand> dispatch;
private final IdGenerator<?> idGenerator;
public ForwardTextStreamToConnection(Dispatch<? super IoCommand> dispatch, IdGenerator<?> idGenerator) {
this.dispatch = dispatch;
this.idGenerator = idGenerator;
}
public void text(String input) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Forwarding input to daemon: '{}'", input.replace("\n", "\\n"));
}
dispatch.dispatch(new ForwardInput(idGenerator.generateId(), input.getBytes()));
}
public void endOfStream(@Nullable Throwable failure) {
CloseInput message = new CloseInput(idGenerator.generateId());
LOGGER.debug("Dispatching close input message: {}", message);
dispatch.dispatch(message);
}
}
}