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.adapter.jdbc.vendor;
23:
24: import java.io.Serializable;
25: import java.lang.reflect.Method;
26: import java.sql.Connection;
27: import java.sql.SQLException;
28:
29: import org.jboss.logging.Logger;
30: import org.jboss.resource.adapter.jdbc.ValidConnectionChecker;
31: import org.jboss.util.NestedRuntimeException;
32:
33: /**
34: * Implements check valid connection sql
35: *
36: * @author <a href="mailto:adrian@jboss.org">Adrian Brock</a>
37: * @version $Revision: 57189 $
38: */
39: public class OracleValidConnectionChecker implements
40: ValidConnectionChecker, Serializable {
41: private static final long serialVersionUID = -2227528634302168877L;
42:
43: private static final Logger log = Logger
44: .getLogger(OracleValidConnectionChecker.class);
45:
46: private Method ping;
47:
48: // The timeout (apparently the timeout is ignored?)
49: private static Object[] params = new Object[] { new Integer(5000) };
50:
51: public OracleValidConnectionChecker() {
52: try {
53: Class oracleConnection = Thread.currentThread()
54: .getContextClassLoader().loadClass(
55: "oracle.jdbc.driver.OracleConnection");
56: ping = oracleConnection.getMethod("pingDatabase",
57: new Class[] { Integer.TYPE });
58: } catch (Exception e) {
59: throw new NestedRuntimeException(
60: "Unable to resolve pingDatabase method:", e);
61: }
62: }
63:
64: public SQLException isValidConnection(Connection c) {
65: try {
66: Integer status = (Integer) ping.invoke(c, params);
67:
68: // Error
69: if (status.intValue() < 0)
70: return new SQLException("pingDatabase failed status="
71: + status);
72: } catch (Exception e) {
73: // What do we do here? Assume it is a misconfiguration
74: log.warn("Unexpected error in pingDatabase", e);
75: }
76:
77: // OK
78: return null;
79: }
80: }
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