OozieSampleJavaClient

Example for Oozie java client API usage.

1. Create a maven projet and add the bellow dependency

	<dependency>
			<groupId>org.apache.oozie</groupId>
			<artifactId>oozie-client</artifactId>
			<version>4.3.0</version>
	</dependency>

2. OozieClient.java

package com.mourya.oozie;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.Map.Entry;

import org.apache.oozie.client.AuthOozieClient;
import org.apache.oozie.client.WorkflowJob.Status;

public class OozieClient {

	AuthOozieClient oozieClient = null;

	public OozieClient(String oozieURLstr, boolean useCache, String cacheFilePath) throws MalformedURLException {

		// oozieURLstr: http://localhost:11000/oozie
		// useCache: "true" to make use of existing cache for authentication.
		// caheFilePath: if file doesn't exist in default user home need to set
		// the path.

		URL oozieUrl = new URL(oozieURLstr);
		if (useCache == true) {
			// To instruct Oozie client to use cached token for kerberos
			// authentication
			System.setProperty("oozie.auth.token.cache", "true");
		}

		if (cacheFilePath != null) {
			System.setProperty("user.home", cacheFilePath);
		}

		oozieClient = new AuthOozieClient(oozieUrl.toString());
	}

	public void submitOozieJob(Map<String, String> oozieConfigMap) {

		Properties conf = oozieClient.createConfiguration();

		for (Entry<String, String> entry : oozieConfigMap.entrySet()) {
			conf.put(entry.getKey(), entry.getValue());
		}

		if (oozieClient != null) {

			try {
				String jobId = oozieClient.run(conf);
				while (oozieClient.getJobInfo(jobId).getStatus() == Status.RUNNING) {
					System.out.println("Submitted Oozie wokflow ID : {" + jobId + "]}");
					Thread.sleep(10000);
				}
				if (oozieClient.getJobInfo(jobId).getStatus() == Status.SUCCEEDED) {

					System.out.println("Workflow job completed !");

				} else {

					System.out.println("Workflow job Failed !");

				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		} else {
			System.out.println("Unable to initialize oozie client");
			System.exit(1);
		}
	}

	public static void main(String args[]) throws MalformedURLException {
		// Prepare a map to pass all necessary configurations to oozie job
		Map<String, String> oozieConfigMap = new HashMap<String, String>();
		oozieConfigMap.put("oozie.wf.application.path", "/user/home/oozie/workflow/");
		new OozieClient("http://localhost:11000/oozie", true, null).submitOozieJob(oozieConfigMap);
	}

}

Note:

1. In order to use kerberos authntication set system property "oozie.auth.token.cache" to true.
2. We even can use oozieClient.getJobInfo("jobId") to get the info related to the job.