Package org.apache.dubbo.metrics.event

Class MetricsEventBus

java.lang.Object

org.apache.dubbo.metrics.event.MetricsEventBus

public class MetricsEventBus
extends Object

Dispatches events to listeners, and provides ways for listeners to register themselves.

Constructor Summary

Constructors

Constructor	Description
MetricsEventBus()

Method Summary

Modifier and Type	Method	Description
static void	after(MetricsEvent event, Object result)
static void	before(MetricsEvent event)	Applicable to the scene where execution and return are separated, eventSaveRunner saves the event, so that the calculation rt is introverted
static void	error(MetricsEvent event)
static <T> T	post(MetricsEvent event, Supplier<T> targetSupplier)	Posts an event to all registered subscribers.
static <T> T	post(MetricsEvent event, Supplier<T> targetSupplier, Function<T,Boolean> trFunction)	Full lifecycle post, success and failure conditions can be customized
static void	publish(MetricsEvent event)	Posts an event to all registered subscribers and only once.
static void	tryInvoke(Runnable runnable)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

MetricsEventBus

public MetricsEventBus()

Method Details

publish

public static void publish(MetricsEvent event)

Posts an event to all registered subscribers and only once.

Parameters:

event - event to post.

post

public static <T> T post(MetricsEvent event,
 Supplier<T> targetSupplier)

Posts an event to all registered subscribers. Full lifecycle post, judging success or failure by whether there is an exception Loop around the event target and return the original processing result

Parameters:

event - event to post.

targetSupplier - original processing result targetSupplier

post

public static <T> T post(MetricsEvent event,
 Supplier<T> targetSupplier,
 Function<T,Boolean> trFunction)

Full lifecycle post, success and failure conditions can be customized

Type Parameters:

T - Biz result type

Parameters:

event - event to post.

targetSupplier - original processing result supplier

trFunction - Custom event success criteria, judged according to the returned boolean type

Returns:

Biz result

tryInvoke

public static void tryInvoke(Runnable runnable)

before

public static void before(MetricsEvent event)

Applicable to the scene where execution and return are separated, eventSaveRunner saves the event, so that the calculation rt is introverted

after

public static void after(MetricsEvent event,
 Object result)

error

public static void error(MetricsEvent event)