org.kitesdk.maven.plugins.DeployAppMojo Maven / Gradle / Ivy

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The Kite Maven Plugin provides Maven goals for packaging, deploying, and running distributed applications.
There is a newer version: 1.1.0
/**
 * Copyright 2013 Cloudera Inc.
 *
 * 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.kitesdk.maven.plugins;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.Path;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;

/**
 * Deploy a packaged application to a Hadoop filesystem, such as HDFS.
 */
@Mojo(name = "deploy-app")
public class DeployAppMojo extends AbstractAppMojo {

  /**
   * The local directory of the application to deploy.
   */
  @Parameter(property = "kite.localApplicationFile")
  private File localApplicationFile;

  /**
   * The Hadoop fileystem used to deploy the application. The filesystem must be
   * accessible by the client deploying the application.
   */
  @Parameter(property = "kite.deployFileSystem", required = true)
  private String deployFileSystem;

  /**
   * Whether to automatically undeploy applications that already exist when deploying.
   * If false, and this application has already been deployed,
   * then an error will be reported.
   */
  @Parameter(property = "kite.updateApplication", defaultValue = "false")
  private boolean updateApplication;

  public void execute() throws MojoExecutionException, MojoFailureException {
    try {
      Configuration conf = new Configuration();
      Path appPath = getAppPath();
      File appFile = localApplicationFile != null ? localApplicationFile
          : new File(mavenProject.getBuild().getDirectory(), applicationName);
      getLog().info("Deploying " + appFile +  " to " +  appPath);

      FileSystem destFileSystem = FileSystem.get(new URI(deployFileSystem), conf);
      if (destFileSystem.exists(appPath)) {
        if (!updateApplication) {
          throw new MojoExecutionException("Application already exists at " +
              appPath + ". Use 'updateApplication' option to force deployment.");
        }
        boolean success = destFileSystem.delete(appPath, true);
        if (!success) {
          throw new MojoExecutionException("Error deleting existing application at " +
              appPath);
        }
      }
      boolean success = FileUtil.copy(appFile, destFileSystem, appPath, false, conf);
      if (!success) {
        throw new MojoExecutionException("Error creating parent directories " +
            "for deploying Oozie application");
      }
    } catch (URISyntaxException e) {
      throw new MojoExecutionException("Syntax error in 'deployFileSystem': "
          + deployFileSystem, e);
    } catch (IOException e) {
      throw new MojoExecutionException("Error deploying application", e);
    }
  }
}