IT. Expert System.

Java Standard Edition (SE)

EventRequestManager


com.sun.jdi.request

Interface EventRequestManager

    • Method Detail

      • createExceptionRequest

        ExceptionRequest createExceptionRequest(ReferenceType refType,
                                                boolean notifyCaught,
                                                boolean notifyUncaught)
        Creates a new disabled ExceptionRequest. The new event request is added to the list managed by this EventRequestManager. Use EventRequest.enable() to activate this event request.

        A specific exception type and its subclasses can be selected for exception events. Caught exceptions, uncaught exceptions, or both can be selected. Note, however, that at the time an exception is thrown, it is not always possible to determine whether it is truly caught. See ExceptionEvent.catchLocation() for details.

        Parameters:
        refType - If non-null, specifies that exceptions which are instances of refType will be reported. Note: this will include instances of sub-types. If null, all instances will be reported
        notifyCaught - If true, caught exceptions will be reported.
        notifyUncaught - If true, uncaught exceptions will be reported.
        Returns:
        the created ExceptionRequest
      • createStepRequest

        StepRequest createStepRequest(ThreadReference thread,
                                      int size,
                                      int depth)
        Creates a new disabled StepRequest. The new event request is added to the list managed by this EventRequestManager. Use EventRequest.enable() to activate this event request.

        The returned request will control stepping only in the specified thread; all other threads will be unaffected. A sizevalue of StepRequest.STEP_MIN will generate a step event each time the code index changes. It represents the smallest step size available and often maps to the instruction level. A size value of StepRequest.STEP_LINE will generate a step event each time the source line changes unless line number information is not available, in which case a STEP_MIN will be done instead. For example, no line number information is available during the execution of a method that has been rendered obsolete by by a VirtualMachine.redefineClasses(java.util.Map<? extends com.sun.jdi.ReferenceType, byte[]>) operation. A depth value of StepRequest.STEP_INTO will generate step events in any called methods. A depth value of StepRequest.STEP_OVER restricts step events to the current frame or caller frames. A depth value of StepRequest.STEP_OUT restricts step events to caller frames only. All depth restrictions are relative to the call stack immediately before the step takes place.

        Only one pending step request is allowed per thread.

        Note that a typical debugger will want to cancel stepping after the first step is detected. Thus a next line method would do the following:

             EventRequestManager mgr = myVM.eventRequestManager();
             StepRequest request = mgr.createStepRequest(myThread,
                                                         StepRequest.STEP_LINE,
                                                         StepRequest.STEP_OVER);
             request.addCountFilter(1);  // next step only
             request.enable();
             myVM.resume();
         
        Parameters:
        thread - the thread in which to step
        depth - the step depth
        size - the step size
        Returns:
        the created StepRequest
        Throws:
        DuplicateRequestException - if there is already a pending step request for the specified thread.
        IllegalArgumentException - if the size or depth arguments contain illegal values.
      • createBreakpointRequest

        BreakpointRequest createBreakpointRequest(Location location)
        Creates a new disabled BreakpointRequest. The given Location must have a valid (that is, non-negative) code index. The new breakpoint is added to the list managed by this EventRequestManager. Multiple breakpoints at the same location are permitted. Use EventRequest.enable() to activate this event request.
        Parameters:
        location - the location of the new breakpoint.
        Returns:
        the created BreakpointRequest
        Throws:
        NativeMethodException - if location is within a native method.
      • createAccessWatchpointRequest

        AccessWatchpointRequest createAccessWatchpointRequest(Field field)
        Creates a new disabled watchpoint which watches accesses to the specified field. The new watchpoint is added to the list managed by this EventRequestManager. Multiple watchpoints on the same field are permitted. Use EventRequest.enable() to activate this event request.

        Not all target virtual machines support this operation. Use VirtualMachine.canWatchFieldAccess() to determine if the operation is supported.

        Parameters:
        field - the field to watch
        Returns:
        the created watchpoint
        Throws:
        UnsupportedOperationException - if the target virtual machine does not support this operation.
      • createModificationWatchpointRequest

        ModificationWatchpointRequest createModificationWatchpointRequest(Field field)
        Creates a new disabled watchpoint which watches accesses to the specified field. The new watchpoint is added to the list managed by this EventRequestManager. Multiple watchpoints on the same field are permitted. Use EventRequest.enable() to activate this event request.

        Not all target virtual machines support this operation. Use VirtualMachine.canWatchFieldModification() to determine if the operation is supported.

        Parameters:
        field - the field to watch
        Returns:
        the created watchpoint
        Throws:
        UnsupportedOperationException - if the target virtual machine does not support this operation.
      • createVMDeathRequest

        VMDeathRequest createVMDeathRequest()
        Creates a new disabled VMDeathRequest. The new request is added to the list managed by this EventRequestManager. Use EventRequest.enable() to activate this event request.

        This request (if enabled) will cause a VMDeathEvent to be sent on termination of the target VM.

        A VMDeathRequest with a suspend policy of SUSPEND_ALL can be used to assure processing of incoming SUSPEND_NONE or SUSPEND_EVENT_THREAD events before VM death. If all event processing is being done in the same thread as event sets are being read, enabling the request is all that is needed since the VM will be suspended until the EventSet containing the VMDeathEvent is resumed.

        Not all target virtual machines support this operation. Use VirtualMachine.canRequestVMDeathEvent() to determine if the operation is supported.

        Returns:
        the created request
        Throws:
        UnsupportedOperationException - if the target VM does not support this operation.
        Since:
        1.4
      • deleteEventRequest

        void deleteEventRequest(EventRequest eventRequest)
        Removes an eventRequest. The eventRequest is disabled and the removed from the requests managed by this EventRequestManager. Once the eventRequest is deleted, no operations (for example, EventRequest.setEnabled(boolean)) are permitted - attempts to do so will generally cause an InvalidRequestStateException. No other eventRequests are effected.

        Because this method changes the underlying lists of event requests, attempting to directly delete from a list returned by a request accessor (e.g. below):

           Iterator iter = requestManager.stepRequests().iterator();
           while (iter.hasNext()) {
              requestManager.deleteEventRequest(iter.next());
          }
         
        may cause a ConcurrentModificationException. Instead use deleteEventRequests(List) or copy the list before iterating.
        Parameters:
        eventRequest - the eventRequest to remove
      • stepRequests

        List<StepRequest> stepRequests()
        Return an unmodifiable list of the enabled and disabled step requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the all StepRequest objects.
      • classPrepareRequests

        List<ClassPrepareRequest> classPrepareRequests()
        Return an unmodifiable list of the enabled and disabled class prepare requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the all ClassPrepareRequest objects.
      • classUnloadRequests

        List<ClassUnloadRequest> classUnloadRequests()
        Return an unmodifiable list of the enabled and disabled class unload requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the all ClassUnloadRequest objects.
      • threadStartRequests

        List<ThreadStartRequest> threadStartRequests()
        Return an unmodifiable list of the enabled and disabled thread start requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the all ThreadStartRequest objects.
      • threadDeathRequests

        List<ThreadDeathRequest> threadDeathRequests()
        Return an unmodifiable list of the enabled and disabled thread death requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the all ThreadDeathRequest objects.
      • exceptionRequests

        List<ExceptionRequest> exceptionRequests()
        Return an unmodifiable list of the enabled and disabled exception requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the all ExceptionRequest objects.
      • breakpointRequests

        List<BreakpointRequest> breakpointRequests()
        Return an unmodifiable list of the enabled and disabled breakpoint requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the list of all BreakpointRequest objects.
      • accessWatchpointRequests

        List<AccessWatchpointRequest> accessWatchpointRequests()
        Return an unmodifiable list of the enabled and disabled access watchpoint requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the all AccessWatchpointRequest objects.
      • modificationWatchpointRequests

        List<ModificationWatchpointRequest> modificationWatchpointRequests()
        Return an unmodifiable list of the enabled and disabled modification watchpoint requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the all ModificationWatchpointRequest objects.
      • methodEntryRequests

        List<MethodEntryRequest> methodEntryRequests()
        Return an unmodifiable list of the enabled and disabled method entry requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the list of all MethodEntryRequest objects.
      • methodExitRequests

        List<MethodExitRequest> methodExitRequests()
        Return an unmodifiable list of the enabled and disabled method exit requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the list of all MethodExitRequest objects.
      • monitorContendedEnterRequests

        List<MonitorContendedEnterRequest> monitorContendedEnterRequests()
        Return an unmodifiable list of the enabled and disabled monitor contended enter requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the list of all MonitorContendedEnterRequest objects.
        Since:
        1.6
      • monitorContendedEnteredRequests

        List<MonitorContendedEnteredRequest> monitorContendedEnteredRequests()
        Return an unmodifiable list of the enabled and disabled monitor contended entered requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the list of all MonitorContendedEnteredRequest objects.
        Since:
        1.6
      • monitorWaitRequests

        List<MonitorWaitRequest> monitorWaitRequests()
        Return an unmodifiable list of the enabled and disabled monitor wait requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the list of all MonitorWaitRequest objects.
        Since:
        1.6
      • monitorWaitedRequests

        List<MonitorWaitedRequest> monitorWaitedRequests()
        Return an unmodifiable list of the enabled and disabled monitor waited requests. This list is a live view of these requests and thus changes as requests are added and deleted.
        Returns:
        the list of all MonitorWaitedRequest objects.
        Since:
        1.6
      • vmDeathRequests

        List<VMDeathRequest> vmDeathRequests()
        Return an unmodifiable list of the enabled and disabled VM death requests. This list is a live view of these requests and thus changes as requests are added and deleted. Note: the unsolicited VMDeathEvent does not have a corresponding request.
        Returns:
        the list of all VMDeathRequest objects.
        Since:
        1.4


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