Package org.apache.storm.metricstore.rocksdb

Class RocksDbStore

java.lang.Object

org.apache.storm.metricstore.rocksdb.RocksDbStore

All Implemented Interfaces:

AutoCloseable, MetricStore

public class RocksDbStore
extends Object
implements MetricStore, AutoCloseable

Nested Class Summary

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

MetricStore.ScanCallback

Constructor Summary

Constructors

Constructor	Description
RocksDbStore()

Method Summary

Modifier and Type	Method	Description
void	close()	Shutdown the store.
void	insert(Metric metric)	Stores metrics 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 Details

RocksDbStore

public RocksDbStore()

Method Details

prepare

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

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

Throws:

MetricException - on preparation error

insert

public void insert(Metric metric)
            throws MetricException

Stores metrics in the store.

Specified by:

insert in interface MetricStore

Parameters:

metric - Metric to store

Throws:

MetricException - if database write fails

populateValue

public boolean populateValue(Metric metric)
                      throws MetricException

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

Throws:

MetricException - if read from database fails

close

public void close()

Shutdown the store.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface MetricStore

scan

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

Scans all metrics in the store and returns the ones matching the specified filtering options. Callback returns Metric class results.

Specified by:

scan in interface MetricStore

Parameters:

filter - options to filter by

scanCallback - callback for each Metric found

Throws:

MetricException - on error