[Jrobin-commits] src/org/jrobin/core RrdNioBackend.java,1.9,1.10

[Sasa M. <sa...@us...>]

Update of /cvsroot/jrobin/src/org/jrobin/core
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv21479/org/jrobin/core

Modified Files:
	RrdNioBackend.java 
Log Message:
rrdrestore command supported

Index: RrdNioBackend.java
===================================================================
RCS file: /cvsroot/jrobin/src/org/jrobin/core/RrdNioBackend.java,v
retrieving revision 1.9
retrieving revision 1.10
diff -C2 -d -r1.9 -r1.10
*** RrdNioBackend.java	12 Jul 2004 13:35:16 -0000	1.9
--- RrdNioBackend.java	13 Jul 2004 11:45:39 -0000	1.10
***************
*** 37,40 ****
--- 37,52 ----
   */
  public class RrdNioBackend extends RrdFileBackend {
+ 	/**
+ 	 * Defines if the <code>System.gc()</code> method should be executed when the backend is closed.
+ 	 * NIO backend uses large in-memory buffer to cache file data. The buffer remains 'active'
+ 	 * (by prohibiting file re-creation, for example) as long as it is not garbage collected.
+ 	 * By forcing <code>gc()</code> after the file is closed memory gets freed sooner and file
+ 	 * re-creation won't fail.<p>
+ 	 *
+ 	 * The constant is set to false initially and currently there is no API to change it
+ 	 * during runtime.<p>
+ 	 */
+ 	public static final boolean SHOULD_GC_AFTER_CLOSE = false;
+ 
  	private static final Timer syncTimer = new Timer(true);
  
***************
*** 104,112 ****
  	 */
  	public void close() throws IOException {
  		if(syncTask != null) {
  			syncTask.cancel();
  		}
! 		super.close(); // calls sync()
  		byteBuffer = null;
  	}
  
--- 116,130 ----
  	 */
  	public void close() throws IOException {
+ 		// cancel synchronization
  		if(syncTask != null) {
  			syncTask.cancel();
  		}
! 		super.close(); // calls sync() eventually
! 		// release the buffer, make it eligible for GC as soon as possible
  		byteBuffer = null;
+ 		if(SHOULD_GC_AFTER_CLOSE) {
+ 			// I am not happy with this, but it might be necessary in the future
+ 			System.gc();
+ 		}
  	}