Question

I have a Java thread that I start so it keeps listening to a socket (considering the a socket read is blocking a thread is needed).

After the Thread receives the data from the socket it needs to call a method from a class.

Now I have two options to do this:

Declare an interface that is passed to the Thread and implemented in a class. When the thread calls the interface method the implementing classes will run it.

Or I can pass the class instance to the Thread as a parameter and then call the class method.

But I wanted to know if the thread blocks while the method is running.

I suppose so but I’m not sure.

I wanted the thread to have a Socket event behavior. What I mean is to only be responsible for reading the data from the socket and fire functions in the main Class, the one that called the Thread.

Answer 1

Yes, the thread will block while executing the method, so it can not read from the socket at the same time. No information will be lost, the transfer only takes longer and you can get a socket timeout if the computation takes too long.

If your method takes much time to run, you should execute it in another worker thread. I recommend to use an Executor for that.