com.netflix.servo.publish

Class BaseMetricPoller

java.lang.Object

com.netflix.servo.publish.BaseMetricPoller

All Implemented Interfaces:

MetricPoller

public abstract class BaseMetricPoller
extends java.lang.Object
implements MetricPoller

Base class for simple pollers that do not benefit from filtering in advance. Sub-classes implement pollImpl(boolean) to return a list and all filtering will be taken care of by the provided implementation of poll(com.netflix.servo.publish.MetricFilter).

Field Summary

Fields

Modifier and Type	Field and Description
protected org.slf4j.Logger	logger

Constructor Summary

Constructors

Constructor and Description
BaseMetricPoller()

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.
abstract java.util.List<Metric>	pollImpl(boolean reset) Return a list of all current metrics for this poller.

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected final org.slf4j.Logger logger

Constructor Detail

BaseMetricPoller

public BaseMetricPoller()

Method Detail

pollImpl

public abstract java.util.List<Metric> pollImpl(boolean reset)

Return a list of all current metrics for this poller.

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