java.lang.ref.ReferenceQueue Maven / Gradle / Ivy
/*
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This work corresponds to the API signatures of JSR 219: Foundation
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*/
package java.lang.ref;
/**
* Reference queues, to which registered reference objects are appended by the
* garbage collector after the appropriate reachability changes are detected.
*
* @version 1.17 10/31/00
* @author Mark Reinhold
* @since 1.2
*/
public class ReferenceQueue
{
/**
* Constructs a new reference-object queue.
*/
public ReferenceQueue() { }
/**
* Polls this queue to see if a reference object is available. If one is
* available without further delay then it is removed from the queue and
* returned. Otherwise this method immediately returns null.
*
* @return A reference object, if one was immediately available,
* otherwise null
*/
public Reference poll() {
return null;
}
/**
* Removes the next reference object in this queue, blocking until either
* one becomes available or the given timeout period expires.
*
*
This method does not offer real-time guarantees: It schedules the
* timeout as if by invoking the {@link Object#wait(long)} method.
*
* @param timeout If positive, block for up timeout
* milliseconds while waiting for a reference to be
* added to this queue. If zero, block indefinitely.
*
* @return A reference object, if one was available within the specified
* timeout period, otherwise null
*
* @throws IllegalArgumentException
* If the value of the timeout argument is negative
*
* @throws InterruptedException
* If the timeout wait is interrupted
*/
public Reference remove(long timeout)
throws IllegalArgumentException, InterruptedException
{
return null;
}
/**
* Removes the next reference object in this queue, blocking until one
* becomes available.
*
* @return A reference object, blocking until one becomes available
* @throws InterruptedException If the wait is interrupted
*/
public Reference remove() throws InterruptedException {
return null;
}
}