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.qos.metrics;
28:
29: import org.cougaar.core.component.ServiceBroker;
30: import org.cougaar.core.node.NodeIdentificationService;
31: import org.cougaar.core.service.AgentIdentificationService;
32: import org.cougaar.core.service.LoggingService;
33:
34: /**
35: * This VariableEvaluator can find values for <code>$(localhost)</code> (the
36: * current host), <code>$(localnode)</code> (the current node) and
37: * <code>$(localagent)</code> (the current agent).
38: */
39: public class StandardVariableEvaluator implements VariableEvaluator {
40: protected ServiceBroker sb;
41: private AgentIdentificationService agentid_service;
42: private NodeIdentificationService nodeid_service;
43: private String host;
44:
45: public StandardVariableEvaluator(ServiceBroker sb) {
46: this .sb = sb;
47: agentid_service = (AgentIdentificationService) sb.getService(
48: this , AgentIdentificationService.class, null);
49: nodeid_service = (NodeIdentificationService) sb.getService(
50: this , NodeIdentificationService.class, null);
51: try {
52: host = java.net.InetAddress.getLocalHost().getHostAddress();
53: } catch (Exception ex) {
54: LoggingService lsvc = (LoggingService) sb.getService(this ,
55: LoggingService.class, null);
56: if (lsvc.isErrorEnabled())
57: lsvc.error("Failed to get local address: " + ex);
58: host = "10.0.0.0"; // nice
59: }
60: }
61:
62: public String evaluateVariable(String var) {
63: if (var.equals("localagent")) {
64: return "Agent(" + agentid_service.getName() + ")";
65: } else if (var.equals("localnode")) {
66: return "Node("
67: + nodeid_service.getMessageAddress().getAddress()
68: + ")";
69: } else if (var.equals("localhost")) {
70: return "Host(" + host + ")";
71: } else {
72: return null;
73: }
74: }
75:
76: }
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