BuildLauncherBackedGradleHandle.java

/*
 * Copyright 2012 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.testkit.functional.internal.toolingapi;

import org.gradle.testkit.functional.ExecutionResult;
import org.gradle.testkit.functional.internal.DefaultExecutionResult;
import org.gradle.testkit.functional.internal.GradleHandle;
import org.gradle.tooling.BuildLauncher;
import org.gradle.tooling.GradleConnectionException;
import org.gradle.tooling.ResultHandler;

import java.io.ByteArrayOutputStream;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicBoolean;

public class BuildLauncherBackedGradleHandle implements GradleHandle {

    final private ByteArrayOutputStream standardOutput = new ByteArrayOutputStream();
    final private ByteArrayOutputStream standardError = new ByteArrayOutputStream();

    private final CountDownLatch runningLatch = new CountDownLatch(1);
    private final AtomicBoolean running = new AtomicBoolean(true);

    private RuntimeException exception;

    public BuildLauncherBackedGradleHandle(BuildLauncher launcher) {
        launcher.setStandardOutput(standardOutput);
        launcher.setStandardError(standardError);

        launcher.run(new ResultHandler<Void>() {
            public void onComplete(Void result) {
                finish();
            }

            public void onFailure(GradleConnectionException failure) {
                exception = failure;
                finish();
            }
        });
    }

    private void finish() {
        running.set(false);
        runningLatch.countDown();
    }

    public String getStandardOutput() {
        return standardOutput.toString();
    }

    public String getStandardError() {
        return standardError.toString();
    }

    public ExecutionResult waitForFinish() {
        try {
            runningLatch.await();
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }

        if (exception == null) {
            return new DefaultExecutionResult(getStandardOutput(), getStandardError());
        } else {
            throw exception;
        }
    }

    public boolean isRunning() {
        return running.get();
    }

}