[英]Spring @Scheduler parallel running
我有以下3個班級:
ComponantA
package mytest.spring.test.spring;
import org.apache.log4j.Logger;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
@Component
public class ComponentA {
Logger log = Logger.getLogger(ComponentB.class);
@Scheduled(fixedRate=2000)
public void sayHello() {
for(int i=1 ; i<=5 ; i++) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
log.info("Hello from ComponentA " + i);
}
}
}
以componentB
package mytest.spring.test.spring;
import org.apache.log4j.Logger;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
@Component
public class ComponentB {
Logger log = Logger.getLogger(ComponentB.class);
@Scheduled(fixedRate=2000)
public void sayHello() {
for(int i=1 ; i<=3 ; i++) {
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
log.info("Hello from ComponentB " + i);
}
}
}
我的應用程序
package mytest.spring.test.spring;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;
@SpringBootApplication
@EnableScheduling
public class MyApplication {
public static void main(String[] args) {
SpringApplication.run(MyApplication.class, args);
}
}
當我執行它時,我得到以下輸出:
Hello from ComponentA 1
Hello from ComponentA 2
Hello from ComponentA 3
Hello from ComponentA 4
Hello from ComponentA 5
Hello from ComponentB 1
Hello from ComponentB 2
Hello from ComponentB 3
Hello from ComponentA 1
Hello from ComponentA 2
Hello from ComponentA 3
Hello from ComponentA 4
Hello from ComponentA 5
Hello from ComponentB 1
Hello from ComponentB 2
Hello from ComponentB 3
...
我需要2個Scheduled方法並行運行,這顯然不是根據我得到的輸出的cae。 我讀到應該可以使用自定義TaskExecutor提供@Schedule注釋,使用它可以定義我們想要的線程數...
我對嗎 ? 我找不到如何提供這些信息。
文件明確指出:
默認情況下,將搜索關聯的調度程序定義:上下文中的唯一
TaskScheduler
bean,或者另一個名為“taskScheduler”的TaskScheduler
bean; 也將對ScheduledExecutorService
bean執行相同的查找。 如果兩者都不可解析,則將在注冊器中創建並使用本地單線程默認調度程序。當需要更多控制時,@ Configuration類可以實現SchedulingConfigurer。 這允許訪問底層的ScheduledTaskRegistrar實例。 例如,以下示例演示如何自定義用於執行計划任務的Executor:
@Configuration @EnableScheduling public class AppConfig implements SchedulingConfigurer { @Override public void configureTasks(ScheduledTaskRegistrar taskRegistrar) { taskRegistrar.setScheduler(taskExecutor()); } @Bean(destroyMethod="shutdown") public Executor taskExecutor() { return Executors.newScheduledThreadPool(100); } }
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