Java调用Kettle执行任务或转换
转载java调用kettle,以供学习。
原文地址:http://blog.csdn.net/scorpio3k/article/details/7869196 作者:scorpio3k
Java调用Kettle执行任务或转换,需要使用Kettle中的jar,可以先导入lib目录中的几个基本的jar,如:kettle-core.jar、kettle-db.jar、kettle-engine.jar ,其它jar根据情况进行添加,所需的jar在<kettle-home>\lib、<kettle-home>\libext下面都可以找到,本示例引用的jar如下图:
之后编写代码测试Java调用,调用前先使用Kettle的设计器设计了一个转换,取名为voucher.ktr。另外,本示例使用的是Kettle3.2的版本,据说4.1版本调用方法会有不同。
- import org.pentaho.di.core.database.DatabaseMeta;
- import org.pentaho.di.core.exception.KettleException;
- import org.pentaho.di.core.logging.LogWriter;
- import org.pentaho.di.core.util.EnvUtil;
- import org.pentaho.di.job.Job;
- import org.pentaho.di.job.JobEntryLoader;
- import org.pentaho.di.job.JobMeta;
- import org.pentaho.di.repository.Repository;
- import org.pentaho.di.repository.RepositoryDirectory;
- import org.pentaho.di.repository.RepositoryMeta;
- import org.pentaho.di.repository.UserInfo;
- import org.pentaho.di.trans.StepLoader;
- import org.pentaho.di.trans.Trans;
- import org.pentaho.di.trans.TransMeta;
- /**
- * Java调用Kettle示例代码
- *
- * @author 李文锴
- * @since 2012-8-14 下午03:50:00
- *
- */
- public class KettleTest {
- public static void main(String[] args) throws KettleException {
- String filename = "voucher.ktr";
- // callNativeTrans(filename);
- // executeTrans();
- // executeJobs();
- callNativeTransWithParam(filename);
- System.out.println("ok");
- }
- /**
- * 调用本地的转换文件
- *
- * @Description:
- * @param transFileName
- * @throws KettleException
- * @author 李文锴
- * @since:2012-8-15 下午02:58:41
- */
- public static void callNativeTrans(String transFileName) throws KettleException {
- // 初始化
- EnvUtil.environmentInit();
- StepLoader.init();
- // 转换元对象
- TransMeta transMeta = new TransMeta(transFileName);
- // 转换
- Trans trans = new Trans(transMeta);
- // 执行转换
- trans.execute(null);
- // 等待转换执行结束
- trans.waitUntilFinished();
- }
- /**
- * 调用本地的转换文件(带参数)
- *
- * @Description:
- * @param transFileName
- * @throws KettleException
- * @author 李文锴
- * @since:2012-8-15 下午02:58:54
- */
- public static void callNativeTransWithParam(String transFileName) throws KettleException {
- // 初始化
- EnvUtil.environmentInit();
- StepLoader.init();
- // 转换元对象
- TransMeta transMeta = new TransMeta(transFileName);
- // 转换
- Trans trans = new Trans(transMeta);
- String[] params = {};
- // 执行转换
- trans.execute(params);
- // 等待转换执行结束
- trans.waitUntilFinished();
- }
- /**
- * 执行存储在数据库资源库中的转换
- *
- * @Description:
- * @throws KettleException
- * @author 李文锴
- * @since:2012-8-15 下午02:59:14
- */
- public static void executeTrans() throws KettleException {
- // 初始化
- EnvUtil.environmentInit();
- StepLoader.init();
- // 日志
- LogWriter log = LogWriter.getInstance("TransTest.log", true, LogWriter.LOG_LEVEL_DEBUG);
- // 用户
- UserInfo userInfo = new UserInfo();
- userInfo.setLogin("admin");
- userInfo.setPassword("admin");
- // 数据库连接元对象(连接名称,不必与kettle中配置的保持一致:数据库类型:连接方式(kettle支持的连接方式):资源库IP:资源库实例名:资源库端口:资源库用户名:资源库用户密码)
- DatabaseMeta connection = new DatabaseMeta("", "Oracle", "Native", "192.168.3.232", "NSDEV", "1521", "nstcsa3441", "671468");
- // 资源库元对象
- RepositoryMeta repinfo = new RepositoryMeta();
- repinfo.setConnection(connection);
- // 资源库
- Repository rep = new Repository(log, repinfo, userInfo);
- // 连接资源库
- rep.connect("");
- // 资源库目录对象
- RepositoryDirectory dir = new RepositoryDirectory(rep);
- // 转换元对象
- TransMeta transMeta = new TransMeta(rep, "凭证(N9->EVC2)", dir);
- // 转换
- Trans trans = new Trans(transMeta);
- // 执行转换
- trans.execute(null);
- // 等待转换执行结束
- trans.waitUntilFinished();
- }
- /**
- * 执行本地的任务文件
- *
- * @Description:
- * @param jobFileName
- * @throws KettleException
- * @author 李文锴
- * @since:2012-8-15 下午02:59:34
- */
- public static void callNativeJob(String jobFileName) throws KettleException {
- // 初始化
- EnvUtil.environmentInit();
- JobEntryLoader.init();
- StepLoader.init();
- // 日志
- LogWriter log = LogWriter.getInstance("TransTest.log", true, LogWriter.LOG_LEVEL_DETAILED);
- // job元对象
- JobMeta jobMeta = new JobMeta(log, jobFileName, null);
- // job
- Job job = new Job(log, StepLoader.getInstance(), null, jobMeta);
- jobMeta.setInternalKettleVariables(job);
- // 执行job
- job.execute();
- // 等待job执行结束
- job.waitUntilFinished();
- }
- /**
- * 执行数据库资源库中的任务
- *
- * @Description:
- * @throws KettleException
- * @author 李文锴
- * @since:2012-8-15 下午02:59:45
- */
- public static void executeJobs() throws KettleException {
- // 初始化
- EnvUtil.environmentInit();
- JobEntryLoader.init();
- StepLoader.init();
- // 日志
- LogWriter log = LogWriter.getInstance("TransTest.log", true, LogWriter.LOG_LEVEL_DETAILED);
- // 用户
- UserInfo userInfo = new UserInfo();
- userInfo.setLogin("admin");
- userInfo.setPassword("admin");
- // 数据库连接元对象
- DatabaseMeta connection = new DatabaseMeta("", "Oracle", "Native", "192.168.3.232", "NSDEV", "1521", "nstcsa3441", "671468");
- // 资源库元对象
- RepositoryMeta repinfo = new RepositoryMeta();
- repinfo.setConnection(connection);
- // 资源库
- Repository rep = new Repository(log, repinfo, userInfo);
- // 连接资源库
- rep.connect("");
- // 资源库目录对象
- RepositoryDirectory dir = new RepositoryDirectory(rep);
- // 步骤加载对象
- StepLoader steploader = StepLoader.getInstance();
- // job元对象
- JobMeta jobmeta = new JobMeta(log, rep, "4.账户每日余额", dir);
- // job
- Job job = new Job(log, steploader, rep, jobmeta);
- // 执行job
- job.execute();
- // 等待job执行结束
- job.waitUntilFinished();
- }
- }
本示例只能实现一次调用,暂时不知道如何通过API设定运行时间,但可以结合Spring和Quartz,设定定时调度,以便实现调度目标。
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