org.frameworkset.util

类 ConcurrencyThrottleSupport

java.lang.Object

org.frameworkset.util.ConcurrencyThrottleSupport

所有已实现的接口:

java.io.Serializable

public abstract class ConcurrencyThrottleSupport
extends java.lang.Object
implements java.io.Serializable

Support class for throttling concurrent access to a specific resource.

Designed for use as a base class, with the subclass invoking the beforeAccess() and afterAccess() methods at appropriate points of its workflow. Note that afterAccess should usually be called in a finally block!

The default concurrency limit of this support class is -1 ("unbounded concurrency"). Subclasses may override this default; check the javadoc of the concrete class that you're using.

从以下版本开始:

1.2.5

另请参阅:

setConcurrencyLimit(int), beforeAccess(), afterAccess(), org.frameworkset.aop.interceptor.ConcurrencyThrottleInterceptor, Serializable, 序列化表格

字段概要

字段

限定符和类型	字段和说明
protected static org.slf4j.Logger	logger Transient to optimize serialization
static int	NO_CONCURRENCY Switch concurrency 'off': that is, don't allow any concurrent invocations.
static int	UNBOUNDED_CONCURRENCY Permit any number of concurrent invocations: that is, don't throttle concurrency.

构造器概要

构造器

构造器和说明
ConcurrencyThrottleSupport()

方法概要

限定符和类型	方法和说明
protected void	afterAccess() To be invoked after the main execution logic of concrete subclasses.
protected void	beforeAccess() To be invoked before the main execution logic of concrete subclasses.
int	getConcurrencyLimit() Return the maximum number of concurrent access attempts allowed.
boolean	isThrottleActive() Return whether this throttle is currently active.
void	setConcurrencyLimit(int concurrencyLimit) Set the maximum number of concurrent access attempts allowed

从类继承的方法 java.lang.Object

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

字段详细资料

UNBOUNDED_CONCURRENCY

public static final int UNBOUNDED_CONCURRENCY

Permit any number of concurrent invocations: that is, don't throttle concurrency.

另请参阅:

常量字段值

NO_CONCURRENCY

public static final int NO_CONCURRENCY

Switch concurrency 'off': that is, don't allow any concurrent invocations.

另请参阅:

常量字段值

logger

protected static transient org.slf4j.Logger logger

Transient to optimize serialization

构造器详细资料

ConcurrencyThrottleSupport

public ConcurrencyThrottleSupport()

方法详细资料

setConcurrencyLimit

public void setConcurrencyLimit(int concurrencyLimit)

Set the maximum number of concurrent access attempts allowed. -1 indicates unbounded concurrency.

In principle, this limit can be changed at runtime, although it is generally designed as a config time setting.

NOTE: Do not switch between -1 and any concrete limit at runtime, as this will lead to inconsistent concurrency counts: A limit of -1 effectively turns off concurrency counting completely.

getConcurrencyLimit

public int getConcurrencyLimit()

Return the maximum number of concurrent access attempts allowed.

isThrottleActive

public boolean isThrottleActive()

Return whether this throttle is currently active.

返回:

true if the concurrency limit for this instance is active

另请参阅:

getConcurrencyLimit()

beforeAccess

protected void beforeAccess()

To be invoked before the main execution logic of concrete subclasses.

This implementation applies the concurrency throttle.

另请参阅:

afterAccess()

afterAccess

protected void afterAccess()

To be invoked after the main execution logic of concrete subclasses.

另请参阅:

beforeAccess()