multithreading - How Executorservice works in java? -


i familiar traditional thread implementation not sure executorservice. know it's handy when dealing threads using executor service. little confuse it's implementation.

let's assume have parent thread/main thread , executor service has max thread pool size 10. want perform task on jms queue if it's size less 1000. right can think implement in 2 ways.

case 1:

class mythreadclass inmplements runnable {       public static void main(string args[]){            while(true){                int checkqueuesize = jmsqueue.getsize();                while(checkqueuesize<1000){                    threadpooltaskexecutor.execute(this);                    ++checkqueuesize;                }            }       }       public void run(){            jmsqueue.pushmessage("hello thread");       } }

case 2:

class mythreadclass inmplements runnable {           public static void main(string args[]){             threadpooltaskexecutor.setwaitfortaskstocompleteonshutdown(true);                threadpooltaskexecutor.execute(this);           }           public void run(){                while(true){                    int checkqueuesize = jmsqueue.getsize();                    while(checkqueuesize<1000){                        jmsqueue.pushmessage("hello thread");                        ++checkqueuesize;                    }                }           }     }

my understanding case 2 not span more 1 thread. correct or not? or there other way perform task?

"case 2 not span more 1 thread" yes. correct. because call execute once.

in first scenario may call execute many times. , in case of previous task isn't finished additional thread runed.


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