Create a thread pool
ThreadPoolExecutor(
int corePoolSize,
int maximumPoolSize,
long keepAliveTime,
TimeUnit unit,
BlockingQueue<Runnable> workQueue,
ThreadFactory threadFactory,
RejectedExecutionHandler handler)
corePoolSize: Minimum number of threads
maximumPoolSize: The maximum number of threads first
keepAliveTime, unit: idle timeout policy
workQueue: Queuing queue
threadFactory: custom-created thread policy
handler: Custom deny policy, the policy specified by the handler refused custom solutions currently support
CallerRunsPolicy
AbortPolicy
DiscardPolicy
DiscardOldestPolicy
Precautions
It is strongly recommended to use a bounded queue: unbounded queue easily lead to oom, oom and causes all the requests is not available. Use executor create a thread pool, oom can cause problems, because many are using the queue
Even with a default deny policy: default deny throws abnormal operation, abnormal operation does not enforce catch at compile time. This will cause the thread to stop, but the most important thing is there is no notice, this will lead developers to perform that task properly. Deal with this problem, the safest or try catch catch the exception.
