io.wcm.maven.plugins.nodejs.mojo.Task.java Source code

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Here is the source code for io.wcm.maven.plugins.nodejs.mojo.Task.java

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/*
 * #%L
 * wcm.io
 * %%
 * Copyright (C) 2014 wcm.io
 * %%
 * 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.
 * #L%
 */
package io.wcm.maven.plugins.nodejs.mojo;

import io.wcm.maven.plugins.nodejs.installation.NodeInstallationInformation;

import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.logging.Log;
import org.apache.maven.plugins.annotations.Parameter;
import org.codehaus.plexus.util.Os;

/**
 * General task implementation.
 */
public class Task {

    private static final String PATH_VARIABLE_NAME = "PATH";

    /**
     * Directory in which the should be executed.
     */
    @Parameter
    protected File workingDirectory;

    private Log log;

    /**
     * Executes the {@link Process} with commands returned by {@link #getCommand(NodeInstallationInformation)}.
     * @param information
     * @throws MojoExecutionException
     */
    public void execute(NodeInstallationInformation information) throws MojoExecutionException {
        ProcessBuilder processBuilder = new ProcessBuilder(getCommand(information));
        if (workingDirectory != null) {
            if (!workingDirectory.exists()) {
                workingDirectory.mkdir();
            }
            processBuilder.directory(workingDirectory);
        }
        setNodePath(processBuilder, information);
        startProcess(processBuilder);
    }

    private void startProcess(ProcessBuilder processBuilder) throws MojoExecutionException {
        try {
            final Process process = processBuilder.start();
            getLog().info("Running process: " + StringUtils.join(processBuilder.command(), " "));
            initLogging(process);
            int result = process.waitFor();
            if (result != 0) {
                throw new MojoExecutionException("Process: " + StringUtils.join(processBuilder.command(), " ")
                        + " terminated with " + result);
            }
        } catch (IOException ex) {
            throw new MojoExecutionException(
                    "Error executing process: " + StringUtils.join(processBuilder.command(), " "), ex);
        } catch (InterruptedException ex) {
            throw new MojoExecutionException(
                    "Error executing process: " + StringUtils.join(processBuilder.command(), " "), ex);
        }
    }

    private void initLogging(final Process process) throws InterruptedException {
        final Thread infoLogThread = new NodejsOutputStreamHandler(process.getInputStream(), getLog());
        final Thread errorLogThread = new NodejsOutputStreamHandler(process.getErrorStream(), getLog());

        infoLogThread.start();
        errorLogThread.start();
        infoLogThread.join();
        errorLogThread.join();
    }

    private void setNodePath(ProcessBuilder pbuilder, NodeInstallationInformation information) {
        final Map<String, String> environment = pbuilder.environment();
        String pathVariableName = PATH_VARIABLE_NAME;
        String pathValue = environment.get(pathVariableName);
        if (Os.isFamily(Os.FAMILY_WINDOWS) || Os.isFamily(Os.FAMILY_WIN9X)) {
            for (String key : environment.keySet()) {
                if (PATH_VARIABLE_NAME.equalsIgnoreCase(key)) {
                    pathVariableName = key;
                    pathValue = environment.get(key);
                }
            }
        }
        if (pathValue == null) {
            environment.put(pathVariableName, information.getNodeExecutable().getParent());
        } else {
            environment.put(pathVariableName,
                    information.getNodeExecutable().getParent() + File.pathSeparator + pathValue);
        }
    }

    /**
     * @param information about the node installation
     * @return {@link List} of commands which will be executed by the task
     * @throws MojoExecutionException
     */
    protected List<String> getCommand(NodeInstallationInformation information) throws MojoExecutionException {
        return null;
    }

    public Log getLog() {
        return log;
    }

    public void setLog(Log log) {
        this.log = log;
    }
}