How to pass database connection to Kettle job from java

Question

I have one Kettle job which will get data from database X and copy the data to another database Y.

I have used some Kettle jars to run this job from java and its working fine.

Now, my requirement is, how can i pass Database name to job from java dynamically?

Example:

String filename = "myJob.kjb";
KettleEnvironment.init();
JobMeta jobMeta = new JobMeta(filename, null);
jobMeta.setParameterValue("TEST_DB", "MyDatabase");
jobMeta.setInternalKettleVariables();
Job job = new Job(null, jobMeta);
job.start();
job.waitUntilFinished();

Answer 1

您是否尝试过jobMeta.activateParameters（）？

Answer 2

看来jobMeta.activateParameters()似乎不起作用，这是动态传递连接所需的全部，但是job步骤未按如下所示选择参数化名称：

<connection>${kettle.db.connection.name}</connection>

Answer 3

您无需动态传递数据库名称，而使用通用连接将所有数据库连接属性动态传递给水壶作业。