怎样用kettle做一个中间件

怎样用kettle做一个中间件

public static void main(String[] args) {
String datetime = "2014-12-19 23:20:45";
String[] params = {"707", datetime}; // 传递参数
String path = "F:\\job7.kjb";

// runTransfer(params, path);
runJob(params, path);
// runJob();
// jbResource();

}


public static void runTransfer(String[] params, String ktrPath) {
Trans trans = null;
try {
// // 初始化
// 转换元对象
KettleEnvironment.init();// 初始化
EnvUtil.environmentInit();
TransMeta transMeta = new TransMeta(ktrPath);
// 转换
trans = new Trans(transMeta);

// 执行转换
trans.execute(params);
// 等待转换执行结束
trans.waitUntilFinished();
// 抛出异常
if (trans.getErrors() > 0) {
throw new Exception(
"There are errors during transformation exception!(传输过程中发生异常)");
}
} catch (Exception e) {
e.printStackTrace();
}
}


public static void runJob(String[] params, String jobPath) {
try {
KettleEnvironment.init();
// jobname 是Job脚本的路径及名称
JobMeta jobMeta = new JobMeta(jobPath, null);
Job job = new Job(null, jobMeta);
// 向Job 脚本传递参数，脚本中获取参数值：${参数名}
// job.setVariable(paraname, paravalue);
job.setVariable("id", params[0]);
job.setVariable("dt", params[1]);
job.start();
job.waitUntilFinished();
if (job.getErrors() > 0) {
throw new Exception(
"There are errors during job exception!(执行job发生异常)");
}
} catch (Exception e) {
e.printStackTrace();
}
}