01: /*
02: * <copyright>
03: *
04: * Copyright 1997-2004 BBNT Solutions, LLC
05: * under sponsorship of the Defense Advanced Research Projects
06: * Agency (DARPA).
07: *
08: * You can redistribute this software and/or modify it under the
09: * terms of the Cougaar Open Source License as published on the
10: * Cougaar Open Source Website (www.cougaar.org).
11: *
12: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
13: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
14: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
15: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
16: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
17: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
18: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
22: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: *
24: * </copyright>
25: */
26:
27: package org.cougaar.core.node;
28:
29: import org.cougaar.core.component.Component;
30: import org.cougaar.core.component.ServiceBroker;
31: import org.cougaar.core.component.ServiceProvider;
32: import org.cougaar.core.component.ServiceRevokedListener;
33: import org.cougaar.core.service.NodeMetricsService;
34: import org.cougaar.util.GenericStateModelAdapter;
35:
36: /**
37: * This component advertises the {@link NodeMetricsService}.
38: */
39: public final class NodeMetrics extends GenericStateModelAdapter
40: implements Component {
41:
42: private ServiceBroker sb;
43: private ServiceBroker rootsb;
44:
45: private ServiceProvider nmsp;
46:
47: public void setServiceBroker(ServiceBroker sb) {
48: this .sb = sb;
49: }
50:
51: public void load() {
52: super .load();
53:
54: NodeControlService ncs = (NodeControlService) sb.getService(
55: this , NodeControlService.class, null);
56: if (ncs == null) {
57: throw new RuntimeException(
58: "Unable to obtain NodeControlService");
59: }
60: rootsb = ncs.getRootServiceBroker();
61: sb.releaseService(this , NodeControlService.class, ncs);
62:
63: nmsp = new NodeMetricsServiceProvider(new NodeMetricsProxy());
64: rootsb.addService(NodeMetricsService.class, nmsp);
65: }
66:
67: public void unload() {
68: super .unload();
69:
70: rootsb.revokeService(NodeMetricsService.class, nmsp);
71: nmsp = null;
72: }
73:
74: private static class NodeMetricsProxy implements NodeMetricsService {
75:
76: /** Free Memory snapshot from the Java VM */
77: public long getFreeMemory() {
78: return Runtime.getRuntime().freeMemory();
79: }
80:
81: /** Total memory snaphsot from the Java VM */
82: public long getTotalMemory() {
83: return Runtime.getRuntime().totalMemory();
84: }
85:
86: /** The number of active Threads in the main COUGAAR threadgroup */
87: public int getActiveThreadCount() {
88: return Thread.currentThread().getThreadGroup()
89: .activeCount();
90: }
91: }
92: }
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