Package gov.nih.mipav.view

Class ViewJFrameMemory.MemoryMonitor

  • All Implemented Interfaces:
    java.awt.event.FocusListener, java.lang.Runnable, java.util.EventListener
    Enclosing class:
    ViewJFrameMemory
    public class ViewJFrameMemory.MemoryMonitor
extends java.lang.Object
implements java.lang.Runnable, java.awt.event.FocusListener
    Tracks Memory allocated & used, and notifies anybody who is interested in finding out about it.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private javax.swing.event.ChangeEvent changeEvent
      DOCUMENT ME!
      private int counterGC
      DOCUMENT ME!
      private float freeMemory
      DOCUMENT ME!
      private javax.swing.event.EventListenerList listenerList
      DOCUMENT ME!
      private int percentage
      DOCUMENT ME!
      private long sleepAmount
      DOCUMENT ME!
      private java.lang.Thread thread
      DOCUMENT ME!
      private float totalMemory
      DOCUMENT ME!
      private float usedMemory
      DOCUMENT ME!

    • Constructor Summary

      Constructors 
      Constructor Description
      MemoryMonitor()
      Constructor.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void addMemoryChangeListener​(javax.swing.event.ChangeListener l)
      add a memory change listener.
      protected void fireMemoryChanged()
      Notify all listeners that have registered interest for notification on this event type.
      void focusGained​(java.awt.event.FocusEvent fe)
      focus gained.
      void focusLost​(java.awt.event.FocusEvent fe)
      when focus is lost the source is assumed to be a JTextField, and it sets the sample period.
      long getFree()
      The amount of free memory the thread found.
      int getPercentage()
      The percentage of used memory to total memory the thread found.
      long getTotal()
      The amount of total memory the thread found.
      long getUsed()
      The amount of used memory the thread found.
      void removeMemoryChangeListener​(javax.swing.event.ChangeListener l)
      removes the change listener.
      void run()
      when the thread wakes up, it collects information from the runtime on current memory status.
      void start()
      Start the thread as a minimum priority thread.
      void stop()
      kill the thread.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • changeEvent

        private javax.swing.event.ChangeEvent changeEvent
        DOCUMENT ME!

      • counterGC

        private int counterGC
        DOCUMENT ME!

      • listenerList

        private javax.swing.event.EventListenerList listenerList
        DOCUMENT ME!

      • percentage

        private int percentage
        DOCUMENT ME!

      • sleepAmount

        private long sleepAmount
        DOCUMENT ME!

      • thread

        private volatile java.lang.Thread thread
        DOCUMENT ME!

      • usedMemory

        private float usedMemory
        DOCUMENT ME!

      • freeMemory

        private float freeMemory
        DOCUMENT ME!

      • totalMemory

        private float totalMemory
        DOCUMENT ME!

    • Constructor Detail

      • MemoryMonitor

        public MemoryMonitor()
        Constructor. Creates the list for listeners

    • Method Detail

      • addMemoryChangeListener

        public void addMemoryChangeListener​(javax.swing.event.ChangeListener l)
        add a memory change listener.
        Parameters:
        l - DOCUMENT ME!

      • focusGained

        public void focusGained​(java.awt.event.FocusEvent fe)
        focus gained.
        Specified by:
        focusGained in interface java.awt.event.FocusListener
        Parameters:
        fe - DOCUMENT ME!

      • focusLost

        public void focusLost​(java.awt.event.FocusEvent fe)
        when focus is lost the source is assumed to be a JTextField, and it sets the sample period.
        Specified by:
        focusLost in interface java.awt.event.FocusListener
        Parameters:
        fe - DOCUMENT ME!

      • getFree

        public long getFree()
        The amount of free memory the thread found.
        Returns:
        free memory in bytes

      • getPercentage

        public int getPercentage()
        The percentage of used memory to total memory the thread found.
        Returns:
        percent of used memory to total memeory in %

      • getTotal

        public long getTotal()
        The amount of total memory the thread found.
        Returns:
        total memory allocated by the JVM in bytes

      • getUsed

        public long getUsed()
        The amount of used memory the thread found.
        Returns:
        used memory in bytes

      • removeMemoryChangeListener

        public void removeMemoryChangeListener​(javax.swing.event.ChangeListener l)
        removes the change listener.
        Parameters:
        l - DOCUMENT ME!

      • run

        public void run()
        when the thread wakes up, it collects information from the runtime on current memory status. It then notifies all listeners.
        Specified by:
        run in interface java.lang.Runnable

      • start

        public void start()
        Start the thread as a minimum priority thread.

      • stop

        public void stop()
        kill the thread.

      • fireMemoryChanged

        protected void fireMemoryChanged()
        Notify all listeners that have registered interest for notification on this event type. The event instance is lazily created using the parameters passed into the fire method.