Java Spring ThreadPoolExecutorFactoryBean

If I configure ThreadPoolExecutorFactoryBean with maxPoolSize=1 - so executor always has 1 thread - if I run 2 or 开发者_如何学Pythonmore threads - spring create some queue or next invocation will wait previous? Thanks.

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If the maxPoolSize is 1, then only one thread will run at the same time, so only one task will be executed at the same time. However, the ThreadPoolExecutor has a queue, so any tasks that are not executed immediately will be done asynchronously when a thread becomes available.

So when you have an ThreadPoolExecutor with maxPoolSize 1, the following code will return immediately

executor.execute(runnable1);
executor.execute(runnable2);

and runnable1 will be executed in the thread first, once that's finished, runnable2 will be executed.