org.apache.storm.stats

Class StatsUtil

java.lang.Object

org.apache.storm.stats.StatsUtil

public class StatsUtil
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static int	TEN_MIN_IN_SECONDS
static String	TEN_MIN_IN_SECONDS_STR
static String	TYPE

Constructor Summary

Constructors

Constructor and Description
StatsUtil()

Method Summary

Modifier and Type	Method and Description
static Map<String,Object>	aggBoltExecWinStats(Map<String,Object> accStats, Map<String,Object> newStats, boolean includeSys) aggregate windowed stats from a bolt executor stats with a Map of accumulated stats.
static Map<String,Number>	aggBoltLatAndCount(Map<List<String>,Double> id2execAvg, Map<List<String>,Double> id2procAvg, Map<List<String>,Long> id2numExec) Aggregates number executed, process latency, and execute latency across all streams.
static <K> Map<K,Map>	aggBoltStreamsLatAndCount(Map<K,Double> id2execAvg, Map<K,Double> id2procAvg, Map<K,Long> id2numExec) aggregate number executed and process & execute latencies.
static ComponentPageInfo	aggCompExecsStats(Map exec2hostPort, Map task2component, Map<List<Integer>,Map<String,Object>> beats, String window, boolean includeSys, String topologyId, StormTopology topology, String componentId) aggregate component executor stats.
static Map<String,Object>	aggCompExecStats(String window, boolean includeSys, Map<String,Object> accStats, Map<String,Object> beat, String compType) Combines the aggregate stats of one executor with the given map, selecting the appropriate window and including system components as specified.
static Map<String,Object>	aggPreMergeCompPageBolt(Map<String,Object> beat, String window, boolean includeSys) pre-merge component page bolt stats from an executor heartbeat 1.
static Map<String,Object>	aggPreMergeCompPageSpout(Map<String,Object> beat, String window, boolean includeSys) pre-merge component page spout stats from an executor heartbeat 1.
static <K,V extends Number> Map<String,Object>	aggPreMergeTopoPageBolt(Map<String,Object> beat, String window, boolean includeSys) pre-merge component stats of specified bolt id.
static <K,V extends Number> Map<String,Object>	aggPreMergeTopoPageSpout(Map<String,Object> m, String window, boolean includeSys) pre-merge component stats of specified spout id and returns { comp id -> comp-stats }.
static <K> Map<String,Map<K,Double>>	aggregateAverages(List<Map<String,Map<K,Double>>> avgSeq, List<Map<String,Map<K,Long>>> countSeq) compute an weighted average from a list of average maps and a corresponding count maps extracted from a list of ExecutorSummary.
static <K> Map<String,Double>	aggregateAvgStreams(Map<String,Map<K,Double>> avgs, Map<String,Map<K,Long>> counts) aggregate weighted average of all streams.
static <T> Map<String,Map>	aggregateBoltStats(List<ExecutorSummary> statsSeq, boolean includeSys) aggregate bolt stats.
static Map<String,Map>	aggregateBoltStreams(Map<String,Map> stats) aggregate all bolt streams.
static <T> Map<String,Map<String,Map<T,Long>>>	aggregateCommonStats(List<ExecutorSummary> statsSeq) aggregate common stats from a spout/bolt, called in aggregateSpoutStats/aggregateBoltStats.
static Map<String,Object>	aggregateCompStats(String window, boolean includeSys, List<Map<String,Object>> beats, String compType) Aggregate the stats for a component over a given window of time.
static <T> Map<String,Map<T,Long>>	aggregateCounts(List<Map<String,Map<T,Long>>> countsSeq) aggregate a list of count maps into one map.
static <K,V extends Number> Map<String,Long>	aggregateCountStreams(Map<String,Map<K,V>> stats) aggregate count streams by window.
static Map<String,Map>	aggregateSpoutStats(List<ExecutorSummary> statsSeq, boolean includeSys) aggregate spout stats.
static Map<String,Map>	aggregateSpoutStreams(Map<String,Map> stats) aggregate all spout streams.
static Map<String,Object>	aggSpoutExecWinStats(Map<String,Object> accStats, Map<String,Object> beat, boolean includeSys) aggregate windowed stats from a spout executor stats with a Map of accumulated stats.
static Map<String,Number>	aggSpoutLatAndCount(Map<String,Double> id2compAvg, Map<String,Long> id2numAcked) aggregate number acked and complete latencies across all streams.
static <K> Map<K,Map>	aggSpoutStreamsLatAndCount(Map<K,Double> id2compAvg, Map<K,Long> id2acked) Aggregates number acked and complete latencies.
static TopologyPageInfo	aggTopoExecsStats(String topologyId, Map exec2nodePort, Map task2component, Map<List<Integer>,Map<String,Object>> beats, StormTopology topology, String window, boolean includeSys, IStormClusterState clusterState) aggregate topo executors stats.
static Map<String,Object>	aggTopoExecStats(String window, boolean includeSys, Map<String,Object> accStats, Map<String,Object> beat, String compType) A helper function that does the common work to aggregate stats of one executor with the given map for the topology page.
static List<WorkerSummary>	aggWorkerStats(String stormId, String stormName, Map<Integer,String> task2Component, Map<List<Integer>,Map<String,Object>> beats, Map<List<Long>,List<Object>> exec2NodePort, Map<String,String> nodeHost, Map<WorkerSlot,WorkerResources> worker2Resources, boolean includeSys, boolean userAuthorized, String filterSupervisor, String owner) aggregate statistics per worker for a topology.
static Map<String,Map>	boltStreamsStats(List<ExecutorSummary> summs, boolean includeSys) aggregates bolt stream stats, returns a Map of {metric -> win -> aggregated value}.
static String	componentType(StormTopology topology, String compId) Get the coponenet type for a give id.
static double	computeBoltCapacity(List<ExecutorSummary> executorSumms) computes max bolt capacity.
static double	computeExecutorCapacity(ExecutorSummary summary) Compute the capacity of a executor.
static Map<List<Integer>,Map<String,Object>>	convertExecutorBeats(Map<ExecutorInfo,ExecutorBeat> beats) convert thrift executor heartbeats into a java HashMap.
static Map<List<Integer>,ExecutorStats>	convertExecutorsStats(Map<ExecutorInfo,ExecutorStats> stats) convert executors stats into a HashMap, note that ExecutorStats are remained unchanged.
static Map<String,Object>	convertExecutorStats(ExecutorStats stats) convert thrift ExecutorStats structure into a java HashMap.
static Map<List<Integer>,Map<String,Object>>	convertWorkerBeats(SupervisorWorkerHeartbeat workerHeartbeat) convert SupervisorWorkerHeartbeat to nimbus local report executor heartbeats.
static Map<String,Object>	convertZkExecutorHb(ExecutorBeat beat) convert thrift ExecutorBeat into a java HashMap.
static Map<String,Object>	convertZkWorkerHb(ClusterWorkerHeartbeat workerHb) convert a thrift worker heartbeat into a java HashMap.
static String	errorSubset(String errorStr)
static List<Map<String,Object>>	extractDataFromHb(Map executor2hostPort, Map task2component, Map<List<Integer>,Map<String,Object>> beats, boolean includeSys, StormTopology topology) extracts a list of executor data from heart beats.
static List<Map<String,Object>>	extractDataFromHb(Map executor2hostPort, Map task2component, Map<List<Integer>,Map<String,Object>> beats, boolean includeSys, StormTopology topology, String compId) extracts a list of executor data from heart beats.
static List<Map<String,Object>>	extractNodeInfosFromHbForComp(Map<List<? extends Number>,List<Object>> exec2hostPort, Map<Integer,String> task2component, boolean includeSys, String compId) extract a list of host port info for specified component.
static String	floatStr(Double n) Convert a float to a string for display.
static List<ExecutorSummary>	getFilledStats(List<ExecutorSummary> summs) filter ExecutorSummary whose stats is null.
static Map<String,Object>	mergeAggCompStatsCompPageBolt(Map<String,Object> accBoltStats, Map<String,Object> boltStats) merge accumulated bolt stats with pre-merged component stats.
static Map<String,Object>	mergeAggCompStatsCompPageSpout(Map<String,Object> accSpoutStats, Map<String,Object> spoutStats) merge accumulated bolt stats with pre-merged component stats.
static Map<String,Object>	mergeAggCompStatsTopoPageBolt(Map<String,Object> accBoltStats, Map<String,Object> boltStats) merge accumulated bolt stats with new bolt stats.
static Map<String,Object>	mergeAggCompStatsTopoPageSpout(Map<String,Object> accSpoutStats, Map<String,Object> spoutStats) merge accumulated bolt stats with new bolt stats.
static Map<String,Object>	postAggregateCompStats(Map<String,Object> compStats) post aggregate component stats: 1.
static <T> Map<String,Map<String,Map<T,Long>>>	preProcessStreamSummary(Map<String,Map<String,Map<T,Long>>> streamSummary, boolean includeSys) filter system streams of aggregated spout/bolt stats if necessary.
static Map<String,Map>	spoutStreamsStats(List<ExecutorSummary> summs, boolean includeSys) aggregates spout stream stats, returns a Map of {metric -> win -> aggregated value}.
static ExecutorStats	thriftifyExecutorStats(Map stats) Convert Executor stats to thrift data structure.
static SupervisorWorkerHeartbeat	thriftifyRpcWorkerHb(String stormId, List<Long> executorId) Used for local test.
static <K> Map	windowSetConverter(Map stats, org.apache.storm.stats.ClientStatsUtil.KeyTransformer<K> firstKeyFunc)

Methods inherited from class java.lang.Object

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

Field Detail

TYPE

public static final String TYPE

See Also:

Constant Field Values

TEN_MIN_IN_SECONDS

public static final int TEN_MIN_IN_SECONDS

See Also:

Constant Field Values

TEN_MIN_IN_SECONDS_STR

public static final String TEN_MIN_IN_SECONDS_STR

See Also:

Constant Field Values

Constructor Detail

StatsUtil

public StatsUtil()

Method Detail

aggBoltLatAndCount

public static Map<String,Number> aggBoltLatAndCount(Map<List<String>,Double> id2execAvg,
                                                    Map<List<String>,Double> id2procAvg,
                                                    Map<List<String>,Long> id2numExec)

Aggregates number executed, process latency, and execute latency across all streams.

Parameters:

id2execAvg - { global stream id -> exec avg value }, e.g., {[“split” “default”] 0.44313}

id2procAvg - { global stream id -> proc avg value }

id2numExec - { global stream id -> executed }

aggSpoutLatAndCount

public static Map<String,Number> aggSpoutLatAndCount(Map<String,Double> id2compAvg,
                                                     Map<String,Long> id2numAcked)

aggregate number acked and complete latencies across all streams.

aggBoltStreamsLatAndCount

public static <K> Map<K,Map> aggBoltStreamsLatAndCount(Map<K,Double> id2execAvg,
                                                       Map<K,Double> id2procAvg,
                                                       Map<K,Long> id2numExec)

aggregate number executed and process & execute latencies.

aggSpoutStreamsLatAndCount

public static <K> Map<K,Map> aggSpoutStreamsLatAndCount(Map<K,Double> id2compAvg,
                                                        Map<K,Long> id2acked)

Aggregates number acked and complete latencies.

aggPreMergeCompPageBolt

public static Map<String,Object> aggPreMergeCompPageBolt(Map<String,Object> beat,
                                                         String window,
                                                         boolean includeSys)

pre-merge component page bolt stats from an executor heartbeat 1. computes component capacity 2. converts map keys of stats 3. filters streams if necessary

Parameters:

beat - executor heartbeat data

window - specified window

includeSys - whether to include system streams

Returns:

per-merged stats

aggPreMergeCompPageSpout

public static Map<String,Object> aggPreMergeCompPageSpout(Map<String,Object> beat,
                                                          String window,
                                                          boolean includeSys)

pre-merge component page spout stats from an executor heartbeat 1. computes component capacity 2. converts map keys of stats 3. filters streams if necessary

Parameters:

beat - executor heartbeat data

window - specified window

includeSys - whether to include system streams

Returns:

per-merged stats

aggPreMergeTopoPageBolt

public static <K,V extends Number> Map<String,Object> aggPreMergeTopoPageBolt(Map<String,Object> beat,
                                                                              String window,
                                                                              boolean includeSys)

pre-merge component stats of specified bolt id.

Parameters:

beat - executor heartbeat data

window - specified window

includeSys - whether to include system streams

Returns:

{ comp id -> comp-stats }

aggPreMergeTopoPageSpout

public static <K,V extends Number> Map<String,Object> aggPreMergeTopoPageSpout(Map<String,Object> m,
                                                                               String window,
                                                                               boolean includeSys)

pre-merge component stats of specified spout id and returns { comp id -> comp-stats }.

mergeAggCompStatsCompPageBolt

public static Map<String,Object> mergeAggCompStatsCompPageBolt(Map<String,Object> accBoltStats,
                                                               Map<String,Object> boltStats)

merge accumulated bolt stats with pre-merged component stats.

Parameters:

accBoltStats - accumulated bolt stats

boltStats - pre-merged component stats

Returns:

merged stats

mergeAggCompStatsCompPageSpout

public static Map<String,Object> mergeAggCompStatsCompPageSpout(Map<String,Object> accSpoutStats,
                                                                Map<String,Object> spoutStats)

merge accumulated bolt stats with pre-merged component stats.

mergeAggCompStatsTopoPageBolt

public static Map<String,Object> mergeAggCompStatsTopoPageBolt(Map<String,Object> accBoltStats,
                                                               Map<String,Object> boltStats)

merge accumulated bolt stats with new bolt stats.

Parameters:

accBoltStats - accumulated bolt stats

boltStats - new input bolt stats

Returns:

merged bolt stats

mergeAggCompStatsTopoPageSpout

public static Map<String,Object> mergeAggCompStatsTopoPageSpout(Map<String,Object> accSpoutStats,
                                                                Map<String,Object> spoutStats)

merge accumulated bolt stats with new bolt stats.

aggTopoExecStats

public static Map<String,Object> aggTopoExecStats(String window,
                                                  boolean includeSys,
                                                  Map<String,Object> accStats,
                                                  Map<String,Object> beat,
                                                  String compType)

A helper function that does the common work to aggregate stats of one executor with the given map for the topology page.

aggTopoExecsStats

public static TopologyPageInfo aggTopoExecsStats(String topologyId,
                                                 Map exec2nodePort,
                                                 Map task2component,
                                                 Map<List<Integer>,Map<String,Object>> beats,
                                                 StormTopology topology,
                                                 String window,
                                                 boolean includeSys,
                                                 IStormClusterState clusterState)

aggregate topo executors stats.

Parameters:

topologyId - topology id

exec2nodePort - executor -> host+port

task2component - task -> component

beats - executor[start, end] -> executor heartbeat

topology - storm topology

window - the window to be aggregated

includeSys - whether to include system streams

clusterState - cluster state

Returns:

TopologyPageInfo thrift structure

aggregateBoltStats

public static <T> Map<String,Map> aggregateBoltStats(List<ExecutorSummary> statsSeq,
                                                     boolean includeSys)

aggregate bolt stats.

Parameters:

statsSeq - a seq of ExecutorStats

includeSys - whether to include system streams

Returns:

aggregated bolt stats: {metric -> win -> global stream id -> value}

aggregateSpoutStats

public static Map<String,Map> aggregateSpoutStats(List<ExecutorSummary> statsSeq,
                                                  boolean includeSys)

aggregate spout stats.

Parameters:

statsSeq - a seq of ExecutorStats

includeSys - whether to include system streams

Returns:

aggregated spout stats: {metric -> win -> global stream id -> value}

aggregateCommonStats

public static <T> Map<String,Map<String,Map<T,Long>>> aggregateCommonStats(List<ExecutorSummary> statsSeq)

aggregate common stats from a spout/bolt, called in aggregateSpoutStats/aggregateBoltStats.

preProcessStreamSummary

public static <T> Map<String,Map<String,Map<T,Long>>> preProcessStreamSummary(Map<String,Map<String,Map<T,Long>>> streamSummary,
                                                                              boolean includeSys)

filter system streams of aggregated spout/bolt stats if necessary.

aggregateCountStreams

public static <K,V extends Number> Map<String,Long> aggregateCountStreams(Map<String,Map<K,V>> stats)

aggregate count streams by window.

Parameters:

stats - a Map of value: {win -> stream -> value}

Returns:

a Map of value: {win -> value}

aggregateAverages

public static <K> Map<String,Map<K,Double>> aggregateAverages(List<Map<String,Map<K,Double>>> avgSeq,
                                                              List<Map<String,Map<K,Long>>> countSeq)

compute an weighted average from a list of average maps and a corresponding count maps extracted from a list of ExecutorSummary.

Parameters:

avgSeq - a list of {win -> global stream id -> avg value}

countSeq - a list of {win -> global stream id -> count value}

Returns:

a Map of {win -> global stream id -> weighted avg value}

aggregateAvgStreams

public static <K> Map<String,Double> aggregateAvgStreams(Map<String,Map<K,Double>> avgs,
                                                         Map<String,Map<K,Long>> counts)

aggregate weighted average of all streams.

Parameters:

avgs - a Map of {win -> stream -> average value}

counts - a Map of {win -> stream -> count value}

Returns:

a Map of {win -> aggregated value}

spoutStreamsStats

public static Map<String,Map> spoutStreamsStats(List<ExecutorSummary> summs,
                                                boolean includeSys)

aggregates spout stream stats, returns a Map of {metric -> win -> aggregated value}.

boltStreamsStats

public static Map<String,Map> boltStreamsStats(List<ExecutorSummary> summs,
                                               boolean includeSys)

aggregates bolt stream stats, returns a Map of {metric -> win -> aggregated value}.

aggregateSpoutStreams

public static Map<String,Map> aggregateSpoutStreams(Map<String,Map> stats)

aggregate all spout streams.

Parameters:

stats - a Map of {metric -> win -> stream id -> value}

Returns:

a Map of {metric -> win -> aggregated value}

aggregateBoltStreams

public static Map<String,Map> aggregateBoltStreams(Map<String,Map> stats)

aggregate all bolt streams.

Parameters:

stats - a Map of {metric -> win -> stream id -> value}

Returns:

a Map of {metric -> win -> aggregated value}

aggBoltExecWinStats

public static Map<String,Object> aggBoltExecWinStats(Map<String,Object> accStats,
                                                     Map<String,Object> newStats,
                                                     boolean includeSys)

aggregate windowed stats from a bolt executor stats with a Map of accumulated stats.

aggSpoutExecWinStats

public static Map<String,Object> aggSpoutExecWinStats(Map<String,Object> accStats,
                                                      Map<String,Object> beat,
                                                      boolean includeSys)

aggregate windowed stats from a spout executor stats with a Map of accumulated stats.

aggregateCounts

public static <T> Map<String,Map<T,Long>> aggregateCounts(List<Map<String,Map<T,Long>>> countsSeq)

aggregate a list of count maps into one map.

Parameters:

countsSeq - a seq of {win -> GlobalStreamId -> value}

aggregateCompStats

public static Map<String,Object> aggregateCompStats(String window,
                                                    boolean includeSys,
                                                    List<Map<String,Object>> beats,
                                                    String compType)

Aggregate the stats for a component over a given window of time.

aggCompExecStats

public static Map<String,Object> aggCompExecStats(String window,
                                                  boolean includeSys,
                                                  Map<String,Object> accStats,
                                                  Map<String,Object> beat,
                                                  String compType)

Combines the aggregate stats of one executor with the given map, selecting the appropriate window and including system components as specified.

postAggregateCompStats

public static Map<String,Object> postAggregateCompStats(Map<String,Object> compStats)

post aggregate component stats: 1. computes execute-latency/process-latency from execute/process latency total 2. computes windowed weight avgs 3. transform Map keys

Parameters:

compStats - accumulated comp stats

aggCompExecsStats

public static ComponentPageInfo aggCompExecsStats(Map exec2hostPort,
                                                  Map task2component,
                                                  Map<List<Integer>,Map<String,Object>> beats,
                                                  String window,
                                                  boolean includeSys,
                                                  String topologyId,
                                                  StormTopology topology,
                                                  String componentId)

aggregate component executor stats.

Parameters:

exec2hostPort - a Map of {executor -> host+port}

task2component - a Map of {task id -> component}

beats - a converted HashMap of executor heartbeats, {executor -> heartbeat}

window - specified window

includeSys - whether to include system streams

topologyId - topology id

topology - storm topology

componentId - component id

Returns:

ComponentPageInfo thrift structure

aggWorkerStats

public static List<WorkerSummary> aggWorkerStats(String stormId,
                                                 String stormName,
                                                 Map<Integer,String> task2Component,
                                                 Map<List<Integer>,Map<String,Object>> beats,
                                                 Map<List<Long>,List<Object>> exec2NodePort,
                                                 Map<String,String> nodeHost,
                                                 Map<WorkerSlot,WorkerResources> worker2Resources,
                                                 boolean includeSys,
                                                 boolean userAuthorized,
                                                 String filterSupervisor,
                                                 String owner)

aggregate statistics per worker for a topology. Optionally filtering on specific supervisors

Parameters:

stormId - topology id

stormName - storm topology

task2Component - a Map of {task id -> component}

beats - a converted HashMap of executor heartbeats, {executor -> heartbeat}

exec2NodePort - a Map of {executor -> host+port}

includeSys - whether to include system streams

userAuthorized - whether the user is authorized to view topology info

filterSupervisor - if not null, only return WorkerSummaries for that supervisor

owner - owner of the topology

convertExecutorBeats

public static Map<List<Integer>,Map<String,Object>> convertExecutorBeats(Map<ExecutorInfo,ExecutorBeat> beats)

convert thrift executor heartbeats into a java HashMap.

convertWorkerBeats

public static Map<List<Integer>,Map<String,Object>> convertWorkerBeats(SupervisorWorkerHeartbeat workerHeartbeat)

convert SupervisorWorkerHeartbeat to nimbus local report executor heartbeats.

convertZkExecutorHb

public static Map<String,Object> convertZkExecutorHb(ExecutorBeat beat)

convert thrift ExecutorBeat into a java HashMap.

convertZkWorkerHb

public static Map<String,Object> convertZkWorkerHb(ClusterWorkerHeartbeat workerHb)

convert a thrift worker heartbeat into a java HashMap.

convertExecutorsStats

public static Map<List<Integer>,ExecutorStats> convertExecutorsStats(Map<ExecutorInfo,ExecutorStats> stats)

convert executors stats into a HashMap, note that ExecutorStats are remained unchanged.

convertExecutorStats

public static Map<String,Object> convertExecutorStats(ExecutorStats stats)

convert thrift ExecutorStats structure into a java HashMap.

extractNodeInfosFromHbForComp

public static List<Map<String,Object>> extractNodeInfosFromHbForComp(Map<List<? extends Number>,List<Object>> exec2hostPort,
                                                                     Map<Integer,String> task2component,
                                                                     boolean includeSys,
                                                                     String compId)

extract a list of host port info for specified component.

Parameters:

exec2hostPort - {executor -> host+port}

task2component - {task id -> component}

includeSys - whether to include system streams

compId - component id

Returns:

a list of host+port

extractDataFromHb

public static List<Map<String,Object>> extractDataFromHb(Map executor2hostPort,
                                                         Map task2component,
                                                         Map<List<Integer>,Map<String,Object>> beats,
                                                         boolean includeSys,
                                                         StormTopology topology)

extracts a list of executor data from heart beats.

extractDataFromHb

public static List<Map<String,Object>> extractDataFromHb(Map executor2hostPort,
                                                         Map task2component,
                                                         Map<List<Integer>,Map<String,Object>> beats,
                                                         boolean includeSys,
                                                         StormTopology topology,
                                                         String compId)

extracts a list of executor data from heart beats.

computeBoltCapacity

public static double computeBoltCapacity(List<ExecutorSummary> executorSumms)

computes max bolt capacity.

Parameters:

executorSumms - a list of ExecutorSummary

Returns:

max bolt capacity

computeExecutorCapacity

public static double computeExecutorCapacity(ExecutorSummary summary)

Compute the capacity of a executor. approximation of the % of time spent doing real work.

Parameters:

summary - the stats for the executor.

Returns:

the capacity of the executor.

getFilledStats

public static List<ExecutorSummary> getFilledStats(List<ExecutorSummary> summs)

filter ExecutorSummary whose stats is null.

Parameters:

summs - a list of ExecutorSummary

Returns:

filtered summs

thriftifyRpcWorkerHb

public static SupervisorWorkerHeartbeat thriftifyRpcWorkerHb(String stormId,
                                                             List<Long> executorId)

Used for local test.

thriftifyExecutorStats

public static ExecutorStats thriftifyExecutorStats(Map stats)

Convert Executor stats to thrift data structure.

Parameters:

stats - the stats in the form of a map.

Returns:

teh thrift structure for the stats.

componentType

public static String componentType(StormTopology topology,
                                   String compId)

Get the coponenet type for a give id.

Parameters:

topology - the topology this is a part of.

compId - the id of the component.

Returns:

the type as a String “BOLT” or “SPOUT”.

floatStr

public static String floatStr(Double n)

Convert a float to a string for display.

Parameters:

n - the value to format.

Returns:

the string ready for display.

errorSubset

public static String errorSubset(String errorStr)

windowSetConverter

public static <K> Map windowSetConverter(Map stats,
                                         org.apache.storm.stats.ClientStatsUtil.KeyTransformer<K> firstKeyFunc)