org.apache.hadoop.hbase.client
Class MetricsConnection

java.lang.Object
  org.apache.hadoop.hbase.client.MetricsConnection

@InterfaceAudience.Private
public class MetricsConnection
extends Object

This class is for maintaining the various connection statistics and publishing them through the metrics interfaces. This class manages its own MetricsRegistry and JmxReporter so as to not conflict with other uses of Yammer Metrics within the client application. Instantiating this class implicitly creates and "starts" instances of these classes; be sure to call shutdown() to terminate the thread pools they allocate.

Nested Class Summary

static class	MetricsConnection.CallStats A container class for collecting details about the RPC call as it percolates.
protected class	MetricsConnection.CallTracker
protected static class	MetricsConnection.RegionStats
protected static class	MetricsConnection.RunnerStats

Field Summary

protected MetricsConnection.CallTracker	appendTracker
static String	CLIENT_SIDE_METRICS_ENABLED_KEY Set this key to true to enable metrics collection of client requests.
protected MetricsConnection.CallTracker	deleteTracker
protected MetricsConnection.CallTracker	getTracker
protected MetricsConnection.CallTracker	incrementTracker
protected com.yammer.metrics.core.Counter	metaCacheHits
protected com.yammer.metrics.core.Counter	metaCacheMisses
protected MetricsConnection.CallTracker	multiTracker
protected MetricsConnection.CallTracker	putTracker
protected ConcurrentMap<String,com.yammer.metrics.core.Histogram>	rpcHistograms
protected ConcurrentMap<String,com.yammer.metrics.core.Timer>	rpcTimers
protected MetricsConnection.RunnerStats	runnerStats
protected MetricsConnection.CallTracker	scanTracker
protected ConcurrentHashMap<ServerName,ConcurrentMap<byte[],MetricsConnection.RegionStats>>	serverStats

Constructor Summary

MetricsConnection(HConnectionManager.HConnectionImplementation conn)

Method Summary

void	incrDelayRunners() Increment the number of delay runner counts.
void	incrMetaCacheHit() Increment the number of meta cache hits.
void	incrMetaCacheMiss() Increment the number of meta cache misses.
void	incrNormalRunners() Increment the number of normal runner counts.
static MetricsConnection.CallStats	newCallStats() Produce an instance of MetricsConnection.CallStats for clients to attach to RPCs.
void	shutdown()
void	updateDelayInterval(long interval) Update delay interval of delay runner.
void	updateRpc(com.google.protobuf.Descriptors.MethodDescriptor method, com.google.protobuf.Message param, MetricsConnection.CallStats stats) Report RPC context to metrics system.
void	updateServerStats(ServerName serverName, byte[] regionName, Object r)

Methods inherited from class java.lang.Object

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

Field Detail

CLIENT_SIDE_METRICS_ENABLED_KEY

public static final String CLIENT_SIDE_METRICS_ENABLED_KEY

Set this key to true to enable metrics collection of client requests.

See Also:

Constant Field Values

serverStats

protected ConcurrentHashMap<ServerName,ConcurrentMap<byte[],MetricsConnection.RegionStats>> serverStats

metaCacheHits

protected final com.yammer.metrics.core.Counter metaCacheHits

metaCacheMisses

protected final com.yammer.metrics.core.Counter metaCacheMisses

getTracker

protected final MetricsConnection.CallTracker getTracker

scanTracker

protected final MetricsConnection.CallTracker scanTracker

appendTracker

protected final MetricsConnection.CallTracker appendTracker

deleteTracker

protected final MetricsConnection.CallTracker deleteTracker

incrementTracker

protected final MetricsConnection.CallTracker incrementTracker

putTracker

protected final MetricsConnection.CallTracker putTracker

multiTracker

protected final MetricsConnection.CallTracker multiTracker

runnerStats

protected final MetricsConnection.RunnerStats runnerStats

rpcTimers

protected final ConcurrentMap<String,com.yammer.metrics.core.Timer> rpcTimers

rpcHistograms

protected final ConcurrentMap<String,com.yammer.metrics.core.Histogram> rpcHistograms

Constructor Detail

MetricsConnection

public MetricsConnection(HConnectionManager.HConnectionImplementation conn)

Method Detail

updateServerStats

public void updateServerStats(ServerName serverName,
                              byte[] regionName,
                              Object r)

shutdown

public void shutdown()

newCallStats

public static MetricsConnection.CallStats newCallStats()

Produce an instance of MetricsConnection.CallStats for clients to attach to RPCs.

incrMetaCacheHit

public void incrMetaCacheHit()

Increment the number of meta cache hits.

incrMetaCacheMiss

public void incrMetaCacheMiss()

Increment the number of meta cache misses.

incrNormalRunners

public void incrNormalRunners()

Increment the number of normal runner counts.

incrDelayRunners

public void incrDelayRunners()

Increment the number of delay runner counts.

updateDelayInterval

public void updateDelayInterval(long interval)

Update delay interval of delay runner.

updateRpc

public void updateRpc(com.google.protobuf.Descriptors.MethodDescriptor method,
                      com.google.protobuf.Message param,
                      MetricsConnection.CallStats stats)

Report RPC context to metrics system.