Most visited

Recently visited

Results for

Summary: Ctors | Methods | Inherited Methods

VolatileCallSite

public class VolatileCallSite
extends CallSite

java.lang.Object
↳	java.lang.invoke.CallSite
	↳	java.lang.invoke.VolatileCallSite

A VolatileCallSite is a CallSite whose target acts like a volatile variable. An invokedynamic instruction linked to a VolatileCallSite sees updates to its call site target immediately, even if the update occurs in another thread. There may be a performance penalty for such tight coupling between threads.

In other respects, a VolatileCallSite is interchangeable with MutableCallSite.

See also:

MutableCallSite

Summary

Public constructors
`VolatileCallSite(MethodType type)` Creates a call site with a volatile binding to its target.
`VolatileCallSite(MethodHandle target)` Creates a call site with a volatile binding to its target.

Public methods
`final MethodHandle`	`dynamicInvoker()` Produces a method handle equivalent to an invokedynamic instruction which has been linked to this call site.
`final MethodHandle`	`getTarget()` Returns the target method of the call site, which behaves like a `volatile` field of the `VolatileCallSite`.
`void`	`setTarget(MethodHandle newTarget)` Updates the target method of this call site, as a volatile variable.

Inherited methods

From class


        
          java.lang.invoke.CallSite

`abstract MethodHandle`	`dynamicInvoker()` Produces a method handle equivalent to an invokedynamic instruction which has been linked to this call site.
`abstract MethodHandle`	`getTarget()` Returns the target method of the call site, according to the behavior defined by this call site's specific class.
`abstract void`	`setTarget(MethodHandle newTarget)` Updates the target method of this call site, according to the behavior defined by this call site's specific class.
`MethodType`	`type()` Returns the type of this call site's target.

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Public constructors

VolatileCallSite

public VolatileCallSite (MethodType type)

Creates a call site with a volatile binding to its target. The initial target is set to a method handle of the given type which will throw an IllegalStateException if called.

Parameters
`type`	`MethodType`: the method type that this call site will have

Throws
`NullPointerException`	if the proposed type is null

VolatileCallSite

public VolatileCallSite (MethodHandle target)

Creates a call site with a volatile binding to its target. The target is set to the given value.

Parameters
`target`	`MethodHandle`: the method handle that will be the initial target of the call site

Throws
`NullPointerException`	if the proposed target is null

Public methods

dynamicInvoker

public final MethodHandle dynamicInvoker ()

Produces a method handle equivalent to an invokedynamic instruction which has been linked to this call site.

This method is equivalent to the following code:

MethodHandle getTarget, invoker, result;
 getTarget = MethodHandles.publicLookup().bind(this, "getTarget", MethodType.methodType(MethodHandle.class));
 invoker = MethodHandles.exactInvoker(this.type());
 result = MethodHandles.foldArguments(invoker, getTarget)

Returns
`MethodHandle`	a method handle which always invokes this call site's current target

getTarget

public final MethodHandle getTarget ()

Returns the target method of the call site, which behaves like a volatile field of the VolatileCallSite.

The interactions of getTarget with memory are the same as of a read from a volatile field.

In particular, the current thread is required to issue a fresh read of the target from memory, and must not fail to see a recent update to the target by another thread.

Returns
`MethodHandle`	the linkage state of this call site, a method handle which can change over time

See also:

setTarget(MethodHandle)

setTarget

public void setTarget (MethodHandle newTarget)

Updates the target method of this call site, as a volatile variable. The type of the new target must agree with the type of the old target.

The interactions with memory are the same as of a write to a volatile field. In particular, any threads is guaranteed to see the updated target the next time it calls getTarget.

Parameters
`newTarget`	`MethodHandle`: the new target

Throws
`NullPointerException`	if the proposed new target is null
`WrongMethodTypeException`	if the proposed new target has a method type that differs from the previous target

See also:

getTarget()

Interfaces

Classes

Exceptions

Most visited

Recently visited

Results for

VolatileCallSite

Summary

Public constructors

Public methods

Inherited methods

Public constructors

VolatileCallSite

VolatileCallSite

Public methods

dynamicInvoker

getTarget

setTarget