01: /*
02: * JacORB - a free Java ORB
03: *
04: * Copyright (C) 1999-2004 Gerald Brose
05: *
06: * This library is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU Library General Public
08: * License as published by the Free Software Foundation; either
09: * version 2 of the License, or (at your option) any later version.
10: *
11: * This library is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * Library General Public License for more details.
15: *
16: * You should have received a copy of the GNU Library General Public
17: * License along with this library; if not, write to the Free
18: * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19: *
20: */
21:
22: package org.jacorb.imr;
23:
24: import org.omg.CORBA.ORB;
25:
26: /**
27: * This class represents a host. It contains information about
28: * a server startup daemon residing on this host and provides
29: * a method for starting a server on that host.
30: *
31: * @author Nicolas Noffke
32: *
33: * @version $Id: ImRHostInfo.java,v 1.12 2006/06/27 12:54:33 alphonse.bendt Exp $
34: */
35: public class ImRHostInfo implements java.io.Serializable {
36: public static final long serialVersionUID = 1l;
37:
38: protected final String host;
39:
40: private ServerStartupDaemon ssd_ref;
41: private final String object_string;
42:
43: private boolean reconnect = false;
44:
45: /**
46: * The constructor of this class.
47: *
48: * @param host the HostInfo object to take the information from.
49: */
50:
51: public ImRHostInfo(HostInfo host) {
52: this .host = host.name;
53: ssd_ref = host.ssd_ref;
54: object_string = host.ior_string;
55: }
56:
57: /**
58: * "Convert" this object to a HostInfo object
59: *
60: * @return a HostInfo instance
61: */
62:
63: public HostInfo toHostInfo() {
64: // setting ref explicitely to null since it might be stale.
65: return new HostInfo(host, null, object_string);
66: }
67:
68: /**
69: * This method tries to start a server with the daemon for this host.
70: *
71: * @param command the startup command of the server
72: * @param orb needed for calling string_to_object().
73: * @exception ServerStartupFailed propagated up from the daemon if something
74: * went wrong. Likely to throw CORBA System Exceptions as well, especially
75: * if the daemon is down.
76: */
77:
78: public void startServer(String command, ORB orb)
79: throws ServerStartupFailed {
80: if (reconnect) {
81: ssd_ref = ServerStartupDaemonHelper.narrow(orb
82: .string_to_object(object_string));
83: }
84:
85: ssd_ref.start_server(command);
86: }
87:
88: /**
89: * Things to be done before serialization. Implemented from Serializable.
90: */
91:
92: private void writeObject(java.io.ObjectOutputStream out)
93: throws java.io.IOException {
94: reconnect = true; // all ssd_references are stale after deserialization
95: out.defaultWriteObject();
96: }
97: } // ImRHostInfo
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