org.springframework.aop.target

类 HotSwappableTargetSource

java.lang.Object

org.springframework.aop.target.HotSwappableTargetSource

所有已实现的接口:

Serializable, TargetClassAware, TargetSource

public class HotSwappableTargetSource
extends Object
implements TargetSource, Serializable

TargetSource implementation that caches a local target object, but allows the target to be swapped while the application is running.

If configuring an object of this class in a Spring IoC container, use constructor injection.

This TargetSource is serializable if the target is at the time of serialization.

作者:

Rod Johnson, Juergen Hoeller

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
HotSwappableTargetSource(Object initialTarget) Create a new HotSwappableTargetSource with the given initial target object.

方法概要

限定符和类型	方法和说明
boolean	equals(Object other) Two HotSwappableTargetSources are equal if the current target objects are equal.
Object	getTarget() Return a target instance.
Class<?>	getTargetClass() Return the type of the current target object.
int	hashCode()
boolean	isStatic() Will all calls to TargetSource.getTarget() return the same object?
void	releaseTarget(Object target) Release the given target object obtained from the TargetSource.getTarget() method, if any.
Object	swap(Object newTarget) Swap the target, returning the old target object.
String	toString()

从类继承的方法 java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

构造器详细资料

HotSwappableTargetSource

public HotSwappableTargetSource(Object initialTarget)

Create a new HotSwappableTargetSource with the given initial target object.

参数:

initialTarget - the initial target object

方法详细资料

getTargetClass

public Class<?> getTargetClass()

Return the type of the current target object.

The returned type should usually be constant across all target objects.

指定者:

getTargetClass 在接口中 TargetClassAware

指定者:

getTargetClass 在接口中 TargetSource

返回:

the type of targets returned by this TargetSource

isStatic

public final boolean isStatic()

从接口复制的说明: TargetSource

Will all calls to TargetSource.getTarget() return the same object?

In that case, there will be no need to invoke TargetSource.releaseTarget(Object), and the AOP framework can cache the return value of TargetSource.getTarget().

指定者:

isStatic 在接口中 TargetSource

返回:

true if the target is immutable

另请参阅:

TargetSource.getTarget()

getTarget

public Object getTarget()

从接口复制的说明: TargetSource

Return a target instance. Invoked immediately before the AOP framework calls the "target" of an AOP method invocation.

指定者:

getTarget 在接口中 TargetSource

返回:

the target object which contains the joinpoint, or null if there is no actual target instance

releaseTarget

public void releaseTarget(Object target)

从接口复制的说明: TargetSource

Release the given target object obtained from the TargetSource.getTarget() method, if any.

指定者:

releaseTarget 在接口中 TargetSource

参数:

target - object obtained from a call to TargetSource.getTarget()

swap

public Object swap(Object newTarget)
            throws IllegalArgumentException

Swap the target, returning the old target object.

参数:

newTarget - the new target object

返回:

the old target object

抛出:

IllegalArgumentException - if the new target is invalid

equals

public boolean equals(Object other)

Two HotSwappableTargetSources are equal if the current target objects are equal.

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object