io.vertx.core.spi.metrics

Interface PoolMetrics<T>

All Superinterfaces:

Metrics

public interface PoolMetrics<T>
extends Metrics

An SPI used internally by Vert.x to gather metrics on pools used by Vert.x (execute blocking, worker verticle or data source).

Usually these metrics measure the latency of a task queuing and the latency a task execution.

Author:

Clement Escoffier

Field Summary

Fields inherited from interface io.vertx.core.spi.metrics.Metrics

DISABLE_METRICS_PROPERTY_NAME, METRICS_ENABLED

Method Summary

Modifier and Type	Method and Description
default T	begin(T t) The submitted task start to use the resource.
default void	end(T t, boolean succeeded) The submitted tasks has completed its execution and release the resource.
default void	rejected(T t) The task has been rejected.
default T	submitted() A new task has been submitted to access the resource.

Methods inherited from interface io.vertx.core.spi.metrics.Metrics

close

Method Detail

submitted

default T submitted()

A new task has been submitted to access the resource. This method is called from the submitter context.

Returns:

the timer measuring the task queuing

begin

default T begin(T t)

The submitted task start to use the resource.

Parameters:

t - the timer measuring the task queuing returned by submitted()

Returns:

the timer measuring the task execution

rejected

default void rejected(T t)

The task has been rejected. The underlying resource has probably be shutdown.

Parameters:

t - the timer measuring the task queuing returned by submitted()

end

default void end(T t,
                 boolean succeeded)

The submitted tasks has completed its execution and release the resource.

Parameters:

succeeded - whether or not the task has gracefully completed

t - the timer measuring the task execution returned by begin(T)