spring 线程池执行器DefaultManagedTaskScheduler之jndi

package com.example.spring.async.config;

import java.util.concurrent.Executors;

import javax.naming.NamingException;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.mock.jndi.SimpleNamingContextBuilder;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.concurrent.DefaultManagedTaskScheduler;

@Configuration
public class JndiConfig {
    @Bean
    @Qualifier("jndiTaskScheduler")
    TaskScheduler taskScheduler () {
        //正常情况下，jndi是寻找其它进程提供的服务，这里在本进程中注册只是为了测试效果
        registerJndi();
        //这个类会使用jndi从服务器上寻找服务，可能由其它jvm进程提供线程池。使用的名字为注册名：java:comp/DefaultManagedScheduledExecutorService
        return new DefaultManagedTaskScheduler();
    }

    /**
     * 使用jndi将线程池注入，下面的名字作为寻址的标识：java:comp/DefaultManagedScheduledExecutorService
     * 
     */
    public void registerJndi() {
        SimpleNamingContextBuilder b = new SimpleNamingContextBuilder();
        b.bind("java:comp/DefaultManagedScheduledExecutorService",
               Executors.newScheduledThreadPool(5));
        try {
            b.activate();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (NamingException e) {
            e.printStackTrace();
        }
    }
}

使用类：

package com.example.spring.async;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.stereotype.Service;

import com.example.spring.MyLog;
/**
 * 测试通过jndi获取的线程池执行器来执行服务
 * @DESC 
 * @author guchuang
 *
 */
@Service
public class JndiThreadPool {
    @Autowired
    @Qualifier("jndiTaskScheduler")
    TaskScheduler taskScheduler;

    public void runTask () {
        taskScheduler.scheduleWithFixedDelay((Runnable) () -> {
            MyLog.info("running ");
        }, 1000L);
    }
}

测试类：

package com.example.spring.async;

import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;

import com.example.spring.BaseDemoApplicationTest;
import com.example.spring.MyLog;
import com.example.spring.async.JndiThreadPool;

public class JndiThreadPoolTest extends BaseDemoApplicationTest {

    @Autowired
    JndiThreadPool jndi;
    
    @BeforeClass
    public static void setUpBeforeClass() throws Exception {
    }

    @Before
    public void setUp() throws Exception {
    }

    @Test
    public void testRunTask() {
        jndi.runTask();
        MyLog.sleep(5000);
    }

}