Package org.apache.storm.metricstore

Class NoOpMetricStore

java.lang.Object

org.apache.storm.metricstore.NoOpMetricStore

All Implemented Interfaces:

AutoCloseable, MetricStore

public class NoOpMetricStore
extends Object
implements MetricStore

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.storm.metricstore.MetricStore

MetricStore.ScanCallback

Constructor Summary

Constructors

Constructor	Description
NoOpMetricStore()

Method Summary

Modifier and Type	Method	Description
void	close()	Close the metric store.
void	insert(Metric metric)	Stores a metric in the store.
boolean	populateValue(Metric metric)	Fill out the numeric values for a metric.
void	prepare(Map<String,Object> config, StormMetricsRegistry metricsRegistry)	Create metric store instance using the configurations provided via the config map.
void	scan(FilterOptions filter, MetricStore.ScanCallback scanCallback)	Scans all metrics in the store and returns the ones matching the specified filtering options.

Methods inherited from class java.lang.Object

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

Constructor Detail

NoOpMetricStore

public NoOpMetricStore()

Method Detail

prepare

public void prepare(Map<String,Object> config,
                    StormMetricsRegistry metricsRegistry)

Description copied from interface: MetricStore

Create metric store instance using the configurations provided via the config map.

Specified by:

prepare in interface MetricStore

Parameters:

config - Storm config map

metricsRegistry - The Nimbus daemon metrics registry

insert

public void insert(Metric metric)

Description copied from interface: MetricStore

Stores a metric in the store.

Specified by:

insert in interface MetricStore

Parameters:

metric - Metric to store

populateValue

public boolean populateValue(Metric metric)

Description copied from interface: MetricStore

Fill out the numeric values for a metric.

Specified by:

populateValue in interface MetricStore

Parameters:

metric - Metric to populate

Returns:

true if the metric was populated, false otherwise

close

public void close()

Description copied from interface: MetricStore

Close the metric store.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface MetricStore

scan

public void scan(FilterOptions filter,
                 MetricStore.ScanCallback scanCallback)

Description copied from interface: MetricStore

Scans all metrics in the store and returns the ones matching the specified filtering options.

Specified by:

scan in interface MetricStore

Parameters:

filter - options to filter by

scanCallback - callback for each Metric found