ThreadPoolExecutor 소개
(1)MyRunnable.java
package cn.hwd.tpe.service;
import lombok.extern.slf4j.Slf4j;
@Slf4j
public class MyRunnable implements Runnable {
@Override
public void run() {
log.info(Thread.currentThread().getName());
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
log.error(e.getMessage());
}
}
}
(2)Application.java
package cn.hwd.tpe;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import cn.hwd.tpe.service.MyRunnable;
@SpringBootApplication
public class Application implements CommandLineRunner {
private static final int CORE_POOL_SIZE = 5;
private static final int MAX_POOL_SIZE = 10;
private static final int QUEUE_CAPACITY = 100;
private static final Long KEEP_ALIVE_TIME = 1L;
public static void main(String[] args) throws Exception {
SpringApplication.run(Application.class, args);
}
@Override
public void run(String... args) throws Exception {
// ThreadPoolExecutor
ThreadPoolExecutor executor = new ThreadPoolExecutor(
CORE_POOL_SIZE, //
MAX_POOL_SIZE, //
KEEP_ALIVE_TIME, // ,
TimeUnit.SECONDS, //
new ArrayBlockingQueue<>(QUEUE_CAPACITY), // ,
new ThreadPoolExecutor.CallerRunsPolicy());// , ,
for (int i = 0; i < 10; i++) {
// WorkerThread (WorkerThread Runnable )
Runnable worker = new MyRunnable();
// Runnable
executor.execute(worker);
}
//
executor.shutdown();
while (!executor.isTerminated()) {
}
}
}
3.실행 결과
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.20.RELEASE)
2019-12-17 11:14:10.092 INFO 9172 --- [ main] cn.hwd.tpe.Application : Starting Application on LAPTOP-N1UHE4RC with PID 9172 (D:\workspace\work\test\thread-pool-executor\bin started by vineg in D:\workspace\work\test\thread-pool-executor)
2019-12-17 11:14:10.096 INFO 9172 --- [ main] cn.hwd.tpe.Application : No active profile set, falling back to default profiles: default
2019-12-17 11:14:10.146 INFO 9172 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@757acd7b: startup date [Tue Dec 17 11:14:10 CST 2019]; root of context hierarchy
2019-12-17 11:14:10.726 INFO 9172 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2019-12-17 11:14:10.741 INFO 9172 --- [pool-1-thread-1] cn.hwd.tpe.service.MyRunnable : pool-1-thread-1
2019-12-17 11:14:10.742 INFO 9172 --- [pool-1-thread-2] cn.hwd.tpe.service.MyRunnable : pool-1-thread-2
2019-12-17 11:14:10.744 INFO 9172 --- [pool-1-thread-3] cn.hwd.tpe.service.MyRunnable : pool-1-thread-3
2019-12-17 11:14:10.749 INFO 9172 --- [pool-1-thread-4] cn.hwd.tpe.service.MyRunnable : pool-1-thread-4
2019-12-17 11:14:10.751 INFO 9172 --- [pool-1-thread-5] cn.hwd.tpe.service.MyRunnable : pool-1-thread-5
2019-12-17 11:14:15.742 INFO 9172 --- [pool-1-thread-1] cn.hwd.tpe.service.MyRunnable : pool-1-thread-1
2019-12-17 11:14:15.743 INFO 9172 --- [pool-1-thread-2] cn.hwd.tpe.service.MyRunnable : pool-1-thread-2
2019-12-17 11:14:15.746 INFO 9172 --- [pool-1-thread-3] cn.hwd.tpe.service.MyRunnable : pool-1-thread-3
2019-12-17 11:14:15.751 INFO 9172 --- [pool-1-thread-4] cn.hwd.tpe.service.MyRunnable : pool-1-thread-4
2019-12-17 11:14:15.752 INFO 9172 --- [pool-1-thread-5] cn.hwd.tpe.service.MyRunnable : pool-1-thread-5
2019-12-17 11:14:20.755 INFO 9172 --- [ main] cn.hwd.tpe.Application : Started Application in 10.966 seconds (JVM running for 11.431)
2019-12-17 11:14:20.756 INFO 9172 --- [ Thread-2] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@757acd7b: startup date [Tue Dec 17 11:14:10 CST 2019]; root of context hierarchy
2019-12-17 11:14:20.758 INFO 9172 --- [ Thread-2] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown
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