Revision: 44863
http://brlcad.svn.sourceforge.net/brlcad/?rev=44863&view=rev
Author: davidloman
Date: 2011-06-09 12:03:46 +0000 (Thu, 09 Jun 2011)
Log Message:
-----------
Implement a simple change tracker class with pooling.
Added Paths:
-----------
geomcore/trunk/src/interfaces/java/src/org/brlcad/geometryservice/net/msg/NetMsgChangeTracker.java
Added:
geomcore/trunk/src/interfaces/java/src/org/brlcad/geometryservice/net/msg/NetMsgChangeTracker.java
===================================================================
---
geomcore/trunk/src/interfaces/java/src/org/brlcad/geometryservice/net/msg/NetMsgChangeTracker.java
(rev 0)
+++
geomcore/trunk/src/interfaces/java/src/org/brlcad/geometryservice/net/msg/NetMsgChangeTracker.java
2011-06-09 12:03:46 UTC (rev 44863)
@@ -0,0 +1,120 @@
+/*
+ * BRL-CAD
+ *
+ * Copyright (c) 2011 United States Government as represented by
+ * the U.S. Army Research Laboratory.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this file; see the file named COPYING for more
+ * information.
+ */
+/** @file NetMsgChangeTracker.java
+ *
+ */
+package org.brlcad.geometryservice.net.msg;
+
+import java.util.ArrayList;
+
+/**
+ * Reusable class that groups a NetMsg and a change value together to aid in
+ * tracking the last change made to the NetMsg. Has built in pooling.
+ */
+public class NetMsgChangeTracker {
+
+ /*
+ * Class impl
+ */
+ public static final byte DEFAULT_CHANGE_VALUE = 0;
+ private AbstractNetMsg msg = null;
+ private byte changeValue = DEFAULT_CHANGE_VALUE;
+
+ private NetMsgChangeTracker() {
+ this.msg = null;
+ this.changeValue = NetMsgChangeTracker.DEFAULT_CHANGE_VALUE;
+ }
+
+ private NetMsgChangeTracker(AbstractNetMsg msg) {
+ this.set(msg, NetMsgChangeTracker.DEFAULT_CHANGE_VALUE);
+ }
+
+ private NetMsgChangeTracker(AbstractNetMsg msg, byte initialValue) {
+ this.set(msg, initialValue);
+ }
+
+ /**
+ * @return the changeValue
+ */
+ public byte getChangeValue() {
+ return changeValue;
+ }
+
+ /**
+ * @param changeValue
+ * the changeValue to set
+ */
+ public void setChangeValue(byte changeValue) {
+ this.changeValue = changeValue;
+ }
+
+ /**
+ * @return the msg
+ */
+ public AbstractNetMsg getMsg() {
+ return msg;
+ }
+
+ private final void clear() {
+ this.changeValue = NetMsgChangeTracker.DEFAULT_CHANGE_VALUE;
+ this.msg = null;
+ }
+
+ private final void set(AbstractNetMsg msg, byte initialValue) {
+ this.msg = msg;
+ this.changeValue = initialValue;
+ }
+
+ /*
+ * Pooling/factory impl
+ */
+
+ private static final int DEFAULT_INITIAL_POOL_SIZE = 100;
+ private static ArrayList<NetMsgChangeTracker> pool = new
ArrayList<NetMsgChangeTracker>(
+ DEFAULT_INITIAL_POOL_SIZE);
+
+ public static final NetMsgChangeTracker getChangeTracker(
+ AbstractNetMsg msg, byte initialValue) {
+ int size = pool.size();
+ if (size <= 0)
+ return new NetMsgChangeTracker(msg, initialValue);
+
+ // pop from end for max performance
+ NetMsgChangeTracker tracker = pool.get(size - 1);
+ tracker.set(msg, initialValue);
+ return tracker;
+ }
+
+ public static final void putChangeTracker(NetMsgChangeTracker tracker) {
+ tracker.clear();
+ pool.add(tracker);
+ }
+
+ public static final int fillPool() {
+ int size = pool.size();
+ if (size >= DEFAULT_INITIAL_POOL_SIZE)
+ return size;
+
+ for (int i = size; i < DEFAULT_INITIAL_POOL_SIZE ; ++i) {
+ putChangeTracker(new NetMsgChangeTracker());
+ }
+ return pool.size();
+ }
+}
Property changes on:
geomcore/trunk/src/interfaces/java/src/org/brlcad/geometryservice/net/msg/NetMsgChangeTracker.java
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+ text/plain
Added: svn:eol-style
+ native
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