Source Code Cross Referenced for RMIRegistry.java in  » Science » Cougaar12_4 » org » cougaar » tools » server » rmi » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Science » Cougaar12_4 » org.cougaar.tools.server.rmi 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * <copyright>
003:         *  
004:         *  Copyright 1997-2004 BBNT Solutions, LLC
005:         *  under sponsorship of the Defense Advanced Research Projects
006:         *  Agency (DARPA).
007:         * 
008:         *  You can redistribute this software and/or modify it under the
009:         *  terms of the Cougaar Open Source License as published on the
010:         *  Cougaar Open Source Website (www.cougaar.org).
011:         * 
012:         *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
013:         *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
014:         *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
015:         *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
016:         *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
017:         *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
018:         *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
019:         *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
020:         *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
021:         *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
022:         *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
023:         *  
024:         * </copyright>
025:         */
026:
027:        package org.cougaar.tools.server.rmi;
028:
029:        import java.rmi.registry.LocateRegistry;
030:        import java.rmi.registry.Registry;
031:
032:        import org.cougaar.tools.server.RemoteHost;
033:        import org.cougaar.tools.server.RemoteHostRegistry;
034:
035:        /**
036:         * RMI-specific implementation of a RemoteHost registry.
037:         * <p>
038:         * Note that this is the <i>only</i> public class in this 
039:         * package.
040:         */
041:        public class RMIRegistry extends RemoteHostRegistry {
042:
043:            private static final String REG_NAME = "AppServer";
044:
045:            public RMIRegistry() {
046:            }
047:
048:            // misc "create*" methods
049:
050:            // client
051:            public RemoteHost lookupRemoteHost(String hostName, int hostPort,
052:                    boolean verbose) throws Exception {
053:                // could cache this...
054:
055:                // locate the registry at <hostname, port>
056:                Registry reg;
057:                try {
058:                    reg = LocateRegistry.getRegistry(hostName, hostPort);
059:                } catch (Exception e) {
060:                    if (verbose) {
061:                        System.out.println("Unable to contact " + hostName
062:                                + ":" + hostPort);
063:                    }
064:                    throw e;
065:                }
066:
067:                // get the remote implementation
068:                RemoteHostDecl rhd;
069:                try {
070:                    rhd = (RemoteHostDecl) reg.lookup(REG_NAME);
071:                } catch (Exception e) {
072:                    if (verbose) {
073:                        System.out.println("Unable to find AppServer on "
074:                                + hostName + ":" + hostPort);
075:                    }
076:                    throw e;
077:                }
078:
079:                // create a client wrapper
080:                RemoteHost rh = new RemoteHostStub(rhd);
081:                return rh;
082:            }
083:
084:            // server
085:            public void bindRemoteHost(RemoteHost rh, int port, boolean verbose)
086:                    throws Exception {
087:
088:                // start an RMIRegistry - exit on failure
089:                if (verbose) {
090:                    System.err.print("Creating Registry: ");
091:                }
092:                Registry registry = LocateRegistry.createRegistry(port);
093:                if (verbose) {
094:                    System.err.println(registry.toString());
095:                }
096:
097:                // maybe should save this registry, for efficiency...
098:
099:                // create a server instance
100:                if (verbose) {
101:                    System.err.print("Creating Server: ");
102:                }
103:                RemoteHostDecl rhd = new RemoteHostImpl(rh);
104:
105:                // announce in registry
106:                registry.rebind(REG_NAME, rhd);
107:                if (verbose) {
108:                    System.err.println(rhd.toString());
109:                }
110:            }
111:
112:        }
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