# 通过Java API提交Oozie作业
#### 功能简介
Oozie通过org.apache.oozie.client.OozieClient的run方法提交作业，通过getJobInfo获取作业信息。
#### 代码样例
代码示例中请根据实际情况，修改"OOZIE_URL_DEFAULT"为实际的任意Oozie节点的主机名，例如"https://10-1-131-131:21003/oozie/"。
```
public void test(String jobFilePath) {
        try {
            UserGroupInformation.getLoginUser()
                    .doAs(
                            new PrivilegedExceptionAction<Void>() {
                                /**
                                 * run job
                                 *
                                 * @return null
                                 * @throws Exception exception
                                 */
                                public Void run() throws Exception {
                                    runJob(jobFilePath);
                                    return null;
                                }
                            });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    private void runJob(String jobFilePath) throws OozieClientException, InterruptedException {
        Properties conf = getJobProperties(jobFilePath);
        // submit and start the workflow job
        String jobId = wc.run(conf);
        logger.info("Workflow job submitted : {}" , jobId);
        // wait until the workflow job finishes printing the status every 10 seconds
        while (wc.getJobInfo(jobId).getStatus() == WorkflowJob.Status.RUNNING) {
            logger.info("Workflow job running ... {}" , jobId);
            Thread.sleep(10 * 1000);
        }
        // print the final status of the workflow job
        logger.info("Workflow job completed ... {}" , jobId);
        logger.info(String.valueOf(wc.getJobInfo(jobId)));
    }
    /**
     * Get job.properties File in filePath
     *
     * @param filePath file path
     * @return job.properties
     * @since 2020-09-30
     */
    public Properties getJobProperties(String filePath) {
        File configFile = new File(filePath);
        if (!configFile.exists()) {
            logger.info(filePath , "{} is not exist.");
        }
        InputStream inputStream = null;
        // create a workflow job configuration
        Properties properties = wc.createConfiguration();
        try {
            inputStream = new FileInputStream(filePath);
            properties.load(inputStream);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return properties;
    }
```
#### 注意事项
通过Java API访问Oozie需要先参考环境准备章节进行安全认证，并将依赖的配置文件（配置文件Workflow.xml的开发参见[配置Oozie业务运行流程](https://support.huaweicloud.com/devg3-mrs/mrs_07_160016.html)）与jar包上传到HDFS，并确保进行过安全认证的用户有权限访问HDFS上对应的目录（目录的属主是该用户，或与该用户属于同一个用户组）。