org.glassfish.jersey.server.internal.monitoring

Class TimeWindowStatisticsImpl

java.lang.Object

org.glassfish.jersey.server.internal.monitoring.TimeWindowStatisticsImpl

All Implemented Interfaces:

TimeWindowStatistics

final class TimeWindowStatisticsImpl
extends java.lang.Object
implements TimeWindowStatistics

Immutable Time window statistics that uses backing SlidingWindowTimeReservoir for its Builder implementation.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
(package private) static class	TimeWindowStatisticsImpl.Builder<V> Builder of time window statistics.

Field Summary

Fields

Modifier and Type	Field and Description
private long	averageDuration
private static java.util.concurrent.ConcurrentHashMap<java.lang.Long,TimeWindowStatisticsImpl>	EMPTY
private long	interval
private long	maximumDuration
private long	minimumDuration
private double	requestsPerSecond
private long	totalCount

Constructor Summary

Constructors

Modifier	Constructor and Description
private	TimeWindowStatisticsImpl(long interval, double requestsPerSecond, long minimumDuration, long maximumDuration, long averageDuration, long totalCount)
private	TimeWindowStatisticsImpl(long interval, UniformTimeSnapshot snapshot)

Method Summary

Modifier and Type	Method and Description
long	getAverageDuration() Returns the average duration (processing time) in milliseconds of the request processing measured in the time window.
long	getMaximumDuration() Returns the maximum duration (processing time) in milliseconds of the request processing measured in the time window.
long	getMinimumDuration() Returns the minimum duration (processing time) in milliseconds of the request processing measured in the time window.
long	getRequestCount() Returns the count of requests received measured in the time window.
double	getRequestsPerSecond() Returns average value of how many requests per second were received by application in the time window.
long	getTimeWindow() Returns the size of time window in milliseconds.
TimeWindowStatistics	snapshot() Get the immutable and consistent snapshot of the monitoring statistics.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY

private static final java.util.concurrent.ConcurrentHashMap<java.lang.Long,TimeWindowStatisticsImpl> EMPTY

interval

private final long interval

minimumDuration

private final long minimumDuration

maximumDuration

private final long maximumDuration

averageDuration

private final long averageDuration

totalCount

private final long totalCount

requestsPerSecond

private final double requestsPerSecond

Constructor Detail

TimeWindowStatisticsImpl

private TimeWindowStatisticsImpl(long interval,
                                 double requestsPerSecond,
                                 long minimumDuration,
                                 long maximumDuration,
                                 long averageDuration,
                                 long totalCount)

TimeWindowStatisticsImpl

private TimeWindowStatisticsImpl(long interval,
                                 UniformTimeSnapshot snapshot)

Method Detail

getTimeWindow

public long getTimeWindow()

Description copied from interface: TimeWindowStatistics

Returns the size of time window in milliseconds. Returned value denotes in how many last milliseconds the statistics are evaluated.

Specified by:

getTimeWindow in interface TimeWindowStatistics

Returns:

Time window in milliseconds.

getRequestsPerSecond

public double getRequestsPerSecond()

Description copied from interface: TimeWindowStatistics

Returns average value of how many requests per second were received by application in the time window.

Specified by:

getRequestsPerSecond in interface TimeWindowStatistics

Returns:

Average of requests per second.

getMinimumDuration

public long getMinimumDuration()

Description copied from interface: TimeWindowStatistics

Returns the minimum duration (processing time) in milliseconds of the request processing measured in the time window. The time measures the processing of the request since the start of request processing by Jersey until the response is written or request processing fails and all resources for request processing are released.

Specified by:

getMinimumDuration in interface TimeWindowStatistics

Returns:

Minimum processing time of the request or -1 if no request has been processed.

getMaximumDuration

public long getMaximumDuration()

Description copied from interface: TimeWindowStatistics

Returns the maximum duration (processing time) in milliseconds of the request processing measured in the time window. processing of the request since the start of request processing by Jersey until the response is written or request processing fails and all resources for request processing are released.

Specified by:

getMaximumDuration in interface TimeWindowStatistics

Returns:

Maximum processing time of the request or -1 if no request has been processed.

getRequestCount

public long getRequestCount()

Description copied from interface: TimeWindowStatistics

Returns the count of requests received measured in the time window.

Specified by:

getRequestCount in interface TimeWindowStatistics

Returns:

Count of requests that were handled by the application.

snapshot

public TimeWindowStatistics snapshot()

Description copied from interface: TimeWindowStatistics

Get the immutable and consistent snapshot of the monitoring statistics. Working with snapshots might have negative performance impact as snapshot must be created but ensures consistency of data over time. However, the usage of snapshot is encouraged to avoid working with inconsistent data. Not all statistics must be updated in the same time on mutable version of statistics.

Specified by:

snapshot in interface TimeWindowStatistics

Returns:

Snapshot of time window statistics.

getAverageDuration

public long getAverageDuration()

Description copied from interface: TimeWindowStatistics

Returns the average duration (processing time) in milliseconds of the request processing measured in the time window. The time measures the processing of the request since the start of request processing by Jersey until the response is written or request processing fails and all resources for request processing are released.

Specified by:

getAverageDuration in interface TimeWindowStatistics

Returns:

Average processing time of the request or -1 if no request has been processed.