Executing non-Talend objects and operating system commands

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Often, when running a schedule, it is necessary to execute a mixture of TALEND AND NON-TALEND OBJECTS, such as database scripts, batch files, or shell scripts. This exercise shows how this is easily achieved using Talend.

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Note that this exercise is for Windows only.

Getting ready

Open the job jo_cook_ch11_0080_systemCalls.

How to achieve it…

1. Drag a tSystem component onto the canvas.
2. Set the Command to the following:

"cmd /c"+context.cookbookData+"/batchFiles/jo_cook_ch11_0080_batchFile .bat"

3. Add a tJava component, and add the following code:

System.out.println("Return code"+ ((Integer)globalMap.get("tSystem_1_EXIT_VALUE")));

4. Link the two components using and onSubjobOk trigger and then run the job.

How it works…

The tSystem component sends a call to the operating system to execute a native command. In our case, the command is to execute a .bat file that we have coded.

When the .bat file completes, the return code can be accessed using the EXIT_VALUE global map variable.

There’s more…

Although this exercise is for Windows, the same principle applies for Linux. The only difference being that cmd /c is not required on the command line.

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