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  2. RPG400-L
  3. March 2020

Re: Java->RPG, *SERIALIZE required?

On 2020-03-06 12:34 p.m., Justin Taylor wrote:
I have an old reference (2002) that says you must specify THREAD(*SERIALIZE) when calling an RPGLE service program from Java. Is that still required/recommended?

The RPG Ref manual explains that THREAD(*SERIALIZE) prevents multiple threads from concurrently access the same code, in essence making it singe-threaded. This would be undesirable for my current project.



If your RPG code might be called by multiple threads, you must code the THREAD keyword. But you can code THREAD(*CONCURRENT) if you want your code to run concurrently in multiple threads.

If your code actually runs in multiple threads without the THREAD keyword, bizarre and unreproducible bad-things are almost guaranteed to happen.


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