Change callbacks-Application High Availability Service(AHAS)-阿里云帮助中心

If your program needs to perform a callback when a switch value changes, the feature switch client provides two methods: global change callbacks and individual switch change callbacks.

Global change callbacks

You can use the Listener interface (full package name: com.taobao.csp.switchcenter.core.Listener) to listen for changes to any switch.

Method	Example
SDK method	public class TestListener implements com.taobao.csp.switchcenter.core.Listener { @Override public void valueChange(String appName, String nameSpace, String name, String value) { // This method is called on a successful field value change. Do not cast the value. Use the corresponding field value directly. } } // Register the listener SwitchManager.addListener(new TestListener());
Spring Boot starter method	@SwitchListenerpublic class TestListener implements com.taobao.csp.switchcenter.core.Listener { @Override public void valueChange(String appName, String nameSpace, String name, String value) { // This method is called on a successful field value change. Do not cast the value. Use the corresponding field value directly. }}

Individual switch callbacks

You can implement the com.taobao.csp.switchcenter.core.SwitchCallback interface.

public class TestCallback implements SwitchCallback {

    @Override
    public void execute(String nameSpace, String name, String value) {
        // TODO Auto-generated method stub

    }

}

In the AppSwitch annotation, you can set the callback field.

@AppSwitch(des = "Test switch", level = Level.p1, callback = TestCallback.class)
public static Map<String, String> test_switch = new HashMap<String, String>();


class TestCallback implements SwitchCallback {
    public void execute(String nameSpace, String name, String value){

    }
}