01: /*
02: * JBoss, Home of Professional Open Source.
03: * Copyright 2006, Red Hat Middleware LLC, and individual contributors
04: * as indicated by the @author tags. See the copyright.txt file in the
05: * distribution for a full listing of individual contributors.
06: *
07: * This is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU Lesser General Public License as
09: * published by the Free Software Foundation; either version 2.1 of
10: * the License, or (at your option) any later version.
11: *
12: * This software is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15: * Lesser General Public License for more details.
16: *
17: * You should have received a copy of the GNU Lesser General Public
18: * License along with this software; if not, write to the Free
19: * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21: */
22: package org.jboss.resource.connectionmanager;
23:
24: import java.util.LinkedList;
25:
26: /**
27: * PoolFiller
28: *
29: * @author <a href="mailto:d_jencks@users.sourceforge.net">David Jencks</a>
30: * @author Scott.Stark@jboss.org
31: * @author <a href="mailto:adrian@jboss.com">Adrian Brock</a>
32: * @version $Revision: 60788 $
33: */
34: public class PoolFiller implements Runnable {
35: private final LinkedList pools = new LinkedList();
36:
37: private final Thread fillerThread;
38:
39: private static final PoolFiller filler = new PoolFiller();
40:
41: public static void fillPool(InternalManagedConnectionPool mcp) {
42: filler.internalFillPool(mcp);
43: }
44:
45: public PoolFiller() {
46: fillerThread = new Thread(this , "JCA PoolFiller");
47: fillerThread.start();
48: }
49:
50: public void run() {
51: ClassLoader myClassLoader = getClass().getClassLoader();
52: Thread.currentThread().setContextClassLoader(myClassLoader);
53: //keep going unless interrupted
54: while (true) {
55: try {
56: InternalManagedConnectionPool mcp = null;
57: //keep iterating through pools till empty, exception escapes.
58: while (true) {
59:
60: synchronized (pools) {
61: mcp = (InternalManagedConnectionPool) pools
62: .removeFirst();
63: }
64: if (mcp == null)
65: break;
66:
67: mcp.fillToMin();
68: }
69: } catch (Exception e) {
70: }
71:
72: try {
73: synchronized (pools) {
74: while (pools.isEmpty()) {
75: pools.wait();
76:
77: }
78: }
79: } catch (InterruptedException ie) {
80: return;
81: }
82: }
83: }
84:
85: private void internalFillPool(InternalManagedConnectionPool mcp) {
86: synchronized (pools) {
87: pools.addLast(mcp);
88: pools.notify();
89: }
90: }
91: }
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