/*
* 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.server.exec;
import org.apache.commons.io.IOUtils;
import org.gradle.api.logging.Logger;
import org.gradle.api.logging.Logging;
import org.gradle.internal.UncheckedException;
import org.gradle.launcher.daemon.protocol.ForwardInput;
import org.gradle.launcher.daemon.server.api.DaemonCommandAction;
import org.gradle.launcher.daemon.server.api.DaemonCommandExecution;
import org.gradle.launcher.daemon.server.api.StdinHandler;
import org.gradle.util.StdinSwapper;
import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.util.concurrent.Callable;
/**
* Listens for ForwardInput commands during the execution and sends that to a piped input stream that we install.
*/
public class ForwardClientInput implements DaemonCommandAction {
private static final Logger LOGGER = Logging.getLogger(ForwardClientInput.class);
public void execute(final DaemonCommandExecution execution) {
final PipedOutputStream inputSource = new PipedOutputStream();
final PipedInputStream replacementStdin;
try {
replacementStdin = new PipedInputStream(inputSource);
} catch (IOException e) {
throw UncheckedException.throwAsUncheckedException(e);
}
execution.getConnection().onStdin(new StdinHandler() {
public void onInput(ForwardInput input) {
LOGGER.debug("Writing forwarded input on daemon's stdin.");
try {
inputSource.write(input.getBytes());
} catch (IOException e) {
LOGGER.warn("Received exception trying to forward client input.", e);
}
}
public void onEndOfInput() {
LOGGER.info("Closing daemon's stdin at end of input.");
try {
inputSource.close();
} catch (IOException e) {
LOGGER.warn("Problem closing output stream connected to replacement stdin", e);
} finally {
LOGGER.info("The daemon will no longer process any standard input.");
}
}
});
try {
try {
new StdinSwapper().swap(replacementStdin, new Callable<Void>() {
public Void call() {
execution.proceed();
return null;
}
});
} finally {
execution.getConnection().onStdin(null);
IOUtils.closeQuietly(replacementStdin);
IOUtils.closeQuietly(inputSource);
}
} catch (Exception e) {
throw UncheckedException.throwAsUncheckedException(e);
}
}
}