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.mlm.plugin.ldm;
28:
29: import java.util.Properties;
30:
31: import org.cougaar.core.mts.MessageAddress;
32: import org.cougaar.core.service.BlackboardService;
33: import org.cougaar.planning.ldm.ClusterServesPlugin;
34: import org.cougaar.planning.ldm.PlanningFactory;
35:
36: /* Abstract base class for query handlers which are invoked on behalf of
37: * OplanReaderPlugin
38: */
39: public abstract class SQLOplanQueryHandler extends QueryHandler {
40: protected SQLOplanBase myPlugin;
41:
42: /** Called on QueryHandler load to allow it to start any
43: * threads or other once-only intialization.
44: * It is a good idea for subclasses to call their super.start() if
45: * they override it.
46: **/
47: public void start() {
48: super .start();
49: execute();
50: }
51:
52: public void update() {
53: execute();
54: }
55:
56: protected void initialize(LDMSQLPlugin ldmplugin,
57: MessageAddress cid, ClusterServesPlugin comp,
58: PlanningFactory aldmf, Properties params,
59: BlackboardService sub) {
60: if (!(ldmplugin instanceof SQLOplanBase)) {
61: throw new IllegalArgumentException(
62: "ldmplugin must be an SQLOplanBase");
63: } else {
64: myPlugin = (SQLOplanBase) ldmplugin;
65: super .initialize(ldmplugin, cid, comp, aldmf, params, sub);
66: }
67: }
68:
69: protected void execute() {
70: startQuery(); // let the query have some state
71:
72: String q = getQuery();
73: myPlugin.executeSQL(q, this );
74:
75: endQuery(); // tell the query it is done.
76: }
77:
78: }
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