com.google.gwt.eclipse.core.GWTDeploymentParticipant.java Source code

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Here is the source code for com.google.gwt.eclipse.core.GWTDeploymentParticipant.java

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/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * 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 com.google.gwt.eclipse.core;

import com.google.gdt.eclipse.core.console.TerminateProcessAction;
import com.google.gdt.eclipse.core.deploy.DeploymentParticipant;
import com.google.gdt.eclipse.core.deploy.DeploymentSet;
import com.google.gdt.eclipse.core.projects.ProjectChangeTimestampTracker;
import com.google.gwt.eclipse.core.compile.GWTCompileRunner;
import com.google.gwt.eclipse.core.compile.GWTCompileSettings;
import com.google.gwt.eclipse.core.nature.GWTNature;
import com.google.gwt.eclipse.core.properties.GWTProjectProperties;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.QualifiedName;
import org.eclipse.core.runtime.Status;
import org.eclipse.jdt.core.IJavaProject;

import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;

/**
 * Performs a GWT compile before deployment.
 */
public class GWTDeploymentParticipant implements DeploymentParticipant {

    private static final QualifiedName PREVIOUS_DEPLOYMENT_BUILD_PROJECT_CHANGE_STAMP_KEY = new QualifiedName(
            GWTDeploymentParticipant.class.getName(), "previousDeploymentBuildProjectChangeStamp");

    @Override
    public void deploySucceeded(IJavaProject javaProject, DeploymentSet deploymentSet, IPath warLocation,
            OutputStream consoleOutputStream, IProgressMonitor monitor) {
        // ignored
    }

    @Override
    public void predeploy(IJavaProject javaProject, DeploymentSet deploymentSet, IPath warLocation,
            OutputStream consoleOutputStream, IProgressMonitor monitor) throws CoreException {
        if (!GWTNature.isGWTProject(javaProject.getProject())) {
            // Only compile if the project has the GWT nature
            return;
        }

        try {
            IProject project = javaProject.getProject();
            long curStamp = ProjectChangeTimestampTracker.getProjectTimestamp(project);
            if (curStamp != ProjectChangeTimestampTracker.getTimestampFromKey(project,
                    PREVIOUS_DEPLOYMENT_BUILD_PROJECT_CHANGE_STAMP_KEY)) {
                GWTCompileSettings settings = GWTProjectProperties.getGwtCompileSettings(project);
                settings.setEntryPointModules(GWTProjectProperties.getEntryPointModules(project));

                // Watch the monitor for cancellations, and destroy the process
                TerminateProcessAction processTerminator = new TerminateProcessAction();
                GWTCompileRunner.compileWithCancellationSupport(javaProject, warLocation, settings,
                        consoleOutputStream, processTerminator, monitor, processTerminator);
            } else {
                PrintWriter printWriter = new PrintWriter(consoleOutputStream);
                printWriter.println(
                        "Skipping GWT compilation since no relevant changes have occurred since the last deploy.");
                printWriter.flush();
            }

            project.setPersistentProperty(PREVIOUS_DEPLOYMENT_BUILD_PROJECT_CHANGE_STAMP_KEY,
                    String.valueOf(curStamp));

        } catch (IOException e) {
            throw new CoreException(new Status(IStatus.ERROR, GWTPlugin.PLUGIN_ID, e.getLocalizedMessage(), e));
        } catch (InterruptedException e) {
            throw new CoreException(new Status(IStatus.ERROR, GWTPlugin.PLUGIN_ID, e.getLocalizedMessage(), e));
        }
    }
}