package azkaban.test.executor;

/*
 * Copyright 2012 LinkedIn, 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.
 */

import java.io.File;
import java.util.List;
import java.util.StringTokenizer;

import org.apache.log4j.Logger;

import azkaban.jobExecutor.JavaProcessJob;
import azkaban.utils.Props;

public class JavaJob extends JavaProcessJob {

	public static final String RUN_METHOD_PARAM = "method.run";
	public static final String CANCEL_METHOD_PARAM = "method.cancel";
	public static final String PROGRESS_METHOD_PARAM = "method.progress";

	public static final String JOB_CLASS = "job.class";
	public static final String DEFAULT_CANCEL_METHOD = "cancel";
	public static final String DEFAULT_RUN_METHOD = "run";
	public static final String DEFAULT_PROGRESS_METHOD = "getProgress";

	private String _runMethod;
	private String _cancelMethod;
	private String _progressMethod;

	private Object _javaObject = null;
	private String props;

	public JavaJob(String jobid, Props sysProps, Props jobProps, Logger log) {
		super(jobid, sysProps, new Props(sysProps, jobProps), log);
	}

	@Override
	protected List<String> getClassPaths() {
		List<String> classPath = super.getClassPaths();

		classPath.add(getSourcePathFromClass(JavaJobRunnerMain.class));
		classPath.add(getSourcePathFromClass(Props.class));
		
		String loggerPath = getSourcePathFromClass(org.apache.log4j.Logger.class);
		if (!classPath.contains(loggerPath)) {
			classPath.add(loggerPath);
		}

		// Add hadoop home to classpath
		String hadoopHome = System.getenv("HADOOP_HOME");
		if (hadoopHome == null) {
			info("HADOOP_HOME not set, using default hadoop config.");
		} else {
			info("Using hadoop config found in " + hadoopHome);
			classPath.add(new File(hadoopHome, "conf").getPath());
		}
		return classPath;
	}

	private static String getSourcePathFromClass(Class<?> containedClass) {
		File file = new File(containedClass.getProtectionDomain().getCodeSource().getLocation().getPath());

		if (!file.isDirectory() && file.getName().endsWith(".class")) {
			String name = containedClass.getName();
			StringTokenizer tokenizer = new StringTokenizer(name, ".");
			while(tokenizer.hasMoreTokens()) {
				tokenizer.nextElement();
				file = file.getParentFile();
			}
			return file.getPath();  
		}
		else {
			return containedClass.getProtectionDomain().getCodeSource().getLocation().getPath();
		}
	}
	
	@Override
	protected String getJavaClass() {
		return JavaJobRunnerMain.class.getName();
	}

	@Override
	public String toString() {
		return "JavaJob{" + "_runMethod='" + _runMethod + '\''
				+ ", _cancelMethod='" + _cancelMethod + '\''
				+ ", _progressMethod='" + _progressMethod + '\''
				+ ", _javaObject=" + _javaObject + ", props="
				+ props + '}';
	}
}

