Module jdk.jdi

Package com.sun.jdi.event

Interface EventQueue

All Superinterfaces:

Mirror

public interface EventQueue
extends Mirror

Manager of incoming debugger events for a target VM. Events are always grouped in EventSets. EventSets generated by the debugger back end can be read here. There is one instance of EventQueue assigned to a particular VirtualMachine.

Some events cause the suspension of the target VM - event requests (com.sun.jdi.request) with a suspend policy of SUSPEND_ALL or SUSPEND_EVENT_THREAD and sometimes VMStartEvent. If these suspensions are not resumed the target VM will hang. Thus, it is always good policy to remove() every EventSet from the event queue until an EventSet containing a VMDisconnectEvent is read. Unless resume is being handled in another way, each EventSet should invoke EventSet.resume().

Since:

1.3

See Also:

• EventSet
• VirtualMachine

Method Summary

Modifier and Type	Method	Description
EventSet	remove()	Waits forever for the next available event.
EventSet	remove(long timeout)	Waits a specified time for the next available event.

Methods declared in interface com.sun.jdi.Mirror

toString, virtualMachine

Method Details

remove

EventSet remove()
         throws InterruptedException

Waits forever for the next available event.

Returns:

the next EventSet.

Throws:

InterruptedException - if any thread has interrupted this thread.

VMDisconnectedException - if the connection to the target VM is no longer available. Note this will always be preceded by a VMDisconnectEvent.

remove

EventSet remove(long timeout)
         throws InterruptedException

Waits a specified time for the next available event.

Parameters:

timeout - Time in milliseconds to wait for the next event

Returns:

the next EventSet, or null if there is a timeout.

Throws:

InterruptedException - if any thread has interrupted this thread.

VMDisconnectedException - if the connection to the target VM is no longer available. Note this will always be preceded by a VMDisconnectEvent.

IllegalArgumentException - if the timeout argument contains an illegal value.