org.nuxeo.lib.stream.tools.command

Class LatencyTrackerComputation

java.lang.Object

org.nuxeo.lib.stream.computation.AbstractComputation

org.nuxeo.lib.stream.tools.command.LatencyTrackerComputation

All Implemented Interfaces:

Computation

Direct Known Subclasses:

LatencyMonitorComputation

public class LatencyTrackerComputation
extends AbstractComputation

A computation that sends periodically latencies information into a Log.

Since:

10.1

Field Summary

Fields

Modifier and Type	Field and Description
protected Codec<Record>	codec
protected int	count
protected int	intervalMs
protected List<LogPartitionGroup>	logGroups
protected List<String>	logNames
protected LogManager	manager
protected static String	OUTPUT_STREAM
protected int	remaining
protected boolean	verbose

Fields inherited from class org.nuxeo.lib.stream.computation.AbstractComputation

INPUT_1, INPUT_2, INPUT_3, metadata, OUTPUT_1, OUTPUT_2, OUTPUT_3, OUTPUT_4

Constructor Summary

Constructors

Constructor and Description
LatencyTrackerComputation(LogManager manager, List<String> logNames, String computationName, int intervalSecond, int count, boolean verbose, Codec<Record> codec)

Method Summary

Modifier and Type	Method and Description
protected void	debug(String msg)
static LogPartitionGroup	decodeKey(String key)
void	destroy() Called when the framework is ready to shutdown the computation.
static String	encodeKey(LogPartitionGroup logGroup, int partition)
protected byte[]	encodeLatency(Latency latency)
protected void	error(String msg)
protected List<Latency>	getLatenciesForPartition(LogPartitionGroup logGroup, Codec<Record> codec)
protected void	info(String msg)
void	init(ComputationContext context) Called when the framework has registered the computation successfully.
void	processRecord(ComputationContext context, String inputStreamName, Record record) Process an incoming record on one of the computation's input streams.
void	processTimer(ComputationContext context, String key, long timestamp) Process a timer callback previously set via ComputationContext.setTimer(String, long).

Methods inherited from class org.nuxeo.lib.stream.computation.AbstractComputation

metadata, processFailure, processRetry

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.nuxeo.lib.stream.computation.Computation

signalStop

Field Detail

OUTPUT_STREAM

protected static final String OUTPUT_STREAM

See Also:

Constant Field Values

manager

protected final LogManager manager

logNames

protected final List<String> logNames

intervalMs

protected final int intervalMs

count

protected final int count

verbose

protected final boolean verbose

codec

protected final Codec<Record> codec

remaining

protected int remaining

logGroups

protected List<LogPartitionGroup> logGroups

Constructor Detail

LatencyTrackerComputation

public LatencyTrackerComputation(LogManager manager,
                                 List<String> logNames,
                                 String computationName,
                                 int intervalSecond,
                                 int count,
                                 boolean verbose,
                                 Codec<Record> codec)

Method Detail

init

public void init(ComputationContext context)

Description copied from interface: Computation

Called when the framework has registered the computation successfully. Gives users a first opportunity to schedule timer callbacks and produce records.

Specified by:

init in interface Computation

Overrides:

init in class AbstractComputation

Parameters:

context - The computation context object provided by the system.

processTimer

public void processTimer(ComputationContext context,
                         String key,
                         long timestamp)

Description copied from interface: Computation

Process a timer callback previously set via ComputationContext.setTimer(String, long).

Specified by:

processTimer in interface Computation

Overrides:

processTimer in class AbstractComputation

Parameters:

context - The computation context object provided by the system.

key - The name of the timer.

timestamp - The timestamp (in ms) for which the callback was scheduled.

encodeLatency

protected byte[] encodeLatency(Latency latency)

getLatenciesForPartition

protected List<Latency> getLatenciesForPartition(LogPartitionGroup logGroup,
                                                 Codec<Record> codec)

encodeKey

public static String encodeKey(LogPartitionGroup logGroup,
                               int partition)

decodeKey

public static LogPartitionGroup decodeKey(String key)

destroy

public void destroy()

Description copied from interface: Computation

Called when the framework is ready to shutdown the computation. Gives users a chance to perform some cleanup before the process is killed.

processRecord

public void processRecord(ComputationContext context,
                          String inputStreamName,
                          Record record)

Description copied from interface: Computation

Process an incoming record on one of the computation's input streams.

Parameters:

context - The computation context object provided by the system.

inputStreamName - Name of the input stream that provides the record.

record - The record.

debug

protected void debug(String msg)

info

protected void info(String msg)

error

protected void error(String msg)