我试图理解Lifecycle
接口逻辑。
Lifecycle
的文档说:
容器会将启动/停止信号传播到所有组件 适用于每个容器,例如用于停止/重启场景 运行时。
但似乎cantainer根本没有调用这种方法(开始/停止)。
例如,下一个代码段的结果只是单个输出">> call:正在运行:false"
@Configuration
public class TestApp implements Lifecycle {
boolean runStatus = false;
@Override
public void start() {
System.err.println(">> call: start (Lifecycle)");
runStatus = true;
}
@Override
public void stop() {
System.err.println(">> call: stop (Lifecycle)");
runStatus = false;
}
@Override
public boolean isRunning() {
System.err.println(">> call: is running: " + runStatus);
return runStatus;
}
public static void main(String[] args) {
AbstractApplicationContext ctx = new AnnotationConfigApplicationContext(TestApp.class);
ctx.stop();
}
}
P.S。我听说过SmartLifecycle
,它运行正常。但我对如何正确使用Lifecycle
中的启动/停止方法感兴趣。
答案 0 :(得分:1)
您应该手动start()
和stop()
上下文。
@Configuration
public class TestApp implements Lifecycle {
boolean runStatus = false;
public TestApp (){}
@Bean
public TestApp testApp(){
return new TestApp();
}
@Override
public void start() {
System.err.println(">> call: start (Lifecycle)");
runStatus = true;
}
@Override
public void stop() {
System.err.println(">> call: stop (Lifecycle)");
runStatus = false;
}
@Override
public boolean isRunning() {
System.err.println(">> call: is running: " + runStatus);
return runStatus;
}
public static void main(String[] args) {
AbstractApplicationContext ctx = new AnnotationConfigApplicationContext(TestApp.class);
ctx.start();
TestApp ta = ctx.getBean(TestApp.class);
ctx.stop();
}
}