com.netflix.servo.publish

Class CompositeMetricPoller

java.lang.Object

com.netflix.servo.publish.CompositeMetricPoller

All Implemented Interfaces:

MetricPoller

public class CompositeMetricPoller
extends java.lang.Object
implements MetricPoller

Combines results from a list of metric pollers. This clas

Constructor Summary

Constructors

Constructor and Description
CompositeMetricPoller(java.util.Map<java.lang.String,MetricPoller> pollers, java.util.concurrent.ExecutorService executor, long timeout) Creates a new instance for a set of pollers.

Method Summary

Modifier and Type	Method and Description
java.util.List<Metric>	poll(MetricFilter filter) Fetch the current values for a set of metrics that match the provided filter.
java.util.List<Metric>	poll(MetricFilter filter, boolean reset) Fetch the current values for a set of metrics that match the provided filter.

Methods inherited from class java.lang.Object

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

Constructor Detail

CompositeMetricPoller

public CompositeMetricPoller(java.util.Map<java.lang.String,MetricPoller> pollers,
                             java.util.concurrent.ExecutorService executor,
                             long timeout)

Creates a new instance for a set of pollers.

Parameters:

pollers - a set of pollers to collect data from, the map key for a poller is used as a name identify a particular poller for logging and error messages

executor - an executor to use for executing the poll methods

timeout - timeout in milliseconds used when getting the value from the future

Method Detail

poll

public final java.util.List<Metric> poll(MetricFilter filter)

Fetch the current values for a set of metrics that match the provided filter. This method should be cheap, thread-safe, and interruptible so that it can be called frequently to collect metrics at a regular interval.

Specified by:

poll in interface MetricPoller

Parameters:

filter - retricts the set of metrics

Returns:

list of current metric values

poll

public final java.util.List<Metric> poll(MetricFilter filter,
                                         boolean reset)

Fetch the current values for a set of metrics that match the provided filter. This method should be cheap, thread-safe, and interruptible so that it can be called frequently to collect metrics at a regular interval.

Specified by:

poll in interface MetricPoller

Parameters:

filter - retricts the set of metrics

reset - ignored. This is kept for backwards compatibility only.

Returns:

list of current metric values