org.apache.dubbo.metrics.aggregate

类 SlidingWindow<T>

java.lang.Object

org.apache.dubbo.metrics.aggregate.SlidingWindow<T>

类型参数:

T - Value type for window statistics.

public abstract class SlidingWindow<T>
extends Object

SlidingWindow adopts sliding window algorithm for statistics.

A window contains paneCount panes, intervalInMs = paneCount * paneIntervalInMs

方法概要

限定符和类型	方法和说明
Pane<T>	currentPane() Get the pane at the current timestamp.
Pane<T>	currentPane(long timeMillis) Get the pane at the specified timestamp in milliseconds.
long	getIntervalInMs() Get total interval of the sliding window in milliseconds.
long	getPaneIntervalInMs() Get pane interval of the sliding window in milliseconds.
T	getPaneValue(long timeMillis) Get statistic value from pane at the specified timestamp.
boolean	isPaneDeprecated(long timeMillis, Pane<T> pane) Checks if the specified pane is deprecated at the specified timestamp.
boolean	isPaneDeprecated(Pane<T> pane) Checks if the specified pane is deprecated at the current timestamp.
List<Pane<T>>	list() Get valid pane list for entire sliding window at the current time.
List<Pane<T>>	list(long timeMillis) Get valid pane list for entire sliding window at the specified time.
abstract T	newEmptyValue(long timeMillis) Create a new statistic value for pane.
List<T>	values() Get aggregated value list for entire sliding window at the current time.
List<T>	values(long timeMillis) Get aggregated value list for entire sliding window at the specified time.

从类继承的方法 java.lang.Object

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

方法详细资料

currentPane

public Pane<T> currentPane()

Get the pane at the current timestamp.

返回:

the pane at current timestamp.

currentPane

public Pane<T> currentPane(long timeMillis)

Get the pane at the specified timestamp in milliseconds.

参数:

timeMillis - a timestamp in milliseconds.

返回:

the pane at the specified timestamp if the time is valid; null if time is invalid.

getPaneValue

public T getPaneValue(long timeMillis)

Get statistic value from pane at the specified timestamp.

参数:

timeMillis - the specified timestamp in milliseconds.

返回:

the statistic value if pane at the specified timestamp is up-to-date; otherwise null.

newEmptyValue

public abstract T newEmptyValue(long timeMillis)

Create a new statistic value for pane.

参数:

timeMillis - the specified timestamp in milliseconds.

返回:

new empty statistic value.

isPaneDeprecated

public boolean isPaneDeprecated(Pane<T> pane)

Checks if the specified pane is deprecated at the current timestamp.

参数:

pane - the specified pane.

返回:

true if the pane is deprecated; otherwise false.

isPaneDeprecated

public boolean isPaneDeprecated(long timeMillis,
                                Pane<T> pane)

Checks if the specified pane is deprecated at the specified timestamp.

参数:

timeMillis - the specified time.

pane - the specified pane.

返回:

true if the pane is deprecated; otherwise false.

list

public List<Pane<T>> list()

Get valid pane list for entire sliding window at the current time. The list will only contain "valid" panes.

返回:

valid pane list for entire sliding window.

list

public List<Pane<T>> list(long timeMillis)

Get valid pane list for entire sliding window at the specified time. The list will only contain "valid" panes.

参数:

timeMillis - the specified time.

返回:

valid pane list for entire sliding window.

values

public List<T> values()

Get aggregated value list for entire sliding window at the current time. The list will only contain value from "valid" panes.

返回:

aggregated value list for entire sliding window.

values

public List<T> values(long timeMillis)

Get aggregated value list for entire sliding window at the specified time. The list will only contain value from "valid" panes.

返回:

aggregated value list for entire sliding window.

getIntervalInMs

public long getIntervalInMs()

Get total interval of the sliding window in milliseconds.

返回:

the total interval in milliseconds.

getPaneIntervalInMs

public long getPaneIntervalInMs()

Get pane interval of the sliding window in milliseconds.

返回:

the interval of a pane in milliseconds.