NameService.java revision 672:2bb058ce572e 
1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
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18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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24 */
25
26package com.sun.corba.se.impl.naming.pcosnaming;
27
28import java.io.File;
29import java.util.Properties;
30
31import org.omg.CORBA.Policy;
32import org.omg.PortableServer.POA;
33import org.omg.PortableServer.LifespanPolicyValue;
34import org.omg.PortableServer.RequestProcessingPolicyValue;
35import org.omg.PortableServer.IdAssignmentPolicyValue;
36import org.omg.PortableServer.ServantRetentionPolicyValue;
37import org.omg.CosNaming.NamingContext;
38import org.omg.CosNaming.NamingContextHelper;
39import org.omg.PortableServer.*;
40
41import com.sun.corba.se.spi.orb.ORB ;
42
43import com.sun.corba.se.impl.orbutil.ORBConstants ;
44
45/**
46 * @author      Hemanth Puttaswamy
47 * @since       JDK1.2
48 */
49
50public class NameService
51{
52    private NamingContext rootContext = null;
53    private POA nsPOA = null;
54    private ServantManagerImpl contextMgr;
55    private ORB theorb;
56
57    /**
58     * Create NameService which starts the Root Naming Context in Persistent CosNaming
59     * @param orb an ORB object.
60     * @param logDir a File
61     * @exception java.lang.Exception a Java exception.
62     */
63    public NameService(ORB orb, File logDir)
64        throws Exception
65    {
66        theorb = orb;
67
68        // Moved this to the creation of the ORB that is passed into this
69        // constructor.
70        //
71        // This is required for creating Persistent Servants under this ORB
72        // Right now the Persistent NameService and ORBD are launched together
73        // Find out a better way of doing this, Since ORBD is an important
74        // process which should not be killed because of some external process
75        // orb.setPersistentServerId( (int) 1000 );
76
77        // get and activate the root naming POA
78        POA rootPOA = (POA)orb.resolve_initial_references(
79            ORBConstants.ROOT_POA_NAME ) ;
80        rootPOA.the_POAManager().activate();
81
82        // create a new POA for persistent Naming Contexts
83        // With Non-Retain policy, So that every time Servant Manager
84        // will be contacted when the reference is made for the context
85        // The id assignment is made by the NameServer, The Naming Context
86        // id's will be in the format NC<Index>
87        int i=0;
88        Policy[] poaPolicy = new Policy[4];
89        poaPolicy[i++] = rootPOA.create_lifespan_policy(
90                         LifespanPolicyValue.PERSISTENT);
91        poaPolicy[i++] = rootPOA.create_request_processing_policy(
92                         RequestProcessingPolicyValue.USE_SERVANT_MANAGER);
93        poaPolicy[i++] = rootPOA.create_id_assignment_policy(
94                         IdAssignmentPolicyValue.USER_ID);
95        poaPolicy[i++] = rootPOA.create_servant_retention_policy(
96                         ServantRetentionPolicyValue.NON_RETAIN);
97
98
99        nsPOA = rootPOA.create_POA("NameService", null, poaPolicy);
100        nsPOA.the_POAManager().activate( );
101
102        // create and set the servant manager
103        contextMgr = new
104            ServantManagerImpl(orb, logDir, this );
105
106        // The RootObject key will be NC0
107        String rootKey = contextMgr.getRootObjectKey( );
108        // initialize the root Naming Context
109        NamingContextImpl nc =
110                new NamingContextImpl( orb, rootKey, this, contextMgr );
111        nc = contextMgr.addContext( rootKey, nc );
112        nc.setServantManagerImpl( contextMgr );
113        nc.setORB( orb );
114        nc.setRootNameService( this );
115
116        nsPOA.set_servant_manager(contextMgr);
117        rootContext = NamingContextHelper.narrow(
118        nsPOA.create_reference_with_id( rootKey.getBytes( ),
119        NamingContextHelper.id( ) ) );
120    }
121
122    /**
123     * This method returns the Root Naming Context
124     */
125    public NamingContext initialNamingContext()
126    {
127        return rootContext;
128    }
129
130    /**
131     * This method returns nsPOA which is the only POA that we use for
132     * Persistent Naming Contexts.
133     */
134    POA getNSPOA( ) {
135        return nsPOA;
136    }
137
138
139    /**
140     * This method  creates a NewContext, This will internally invoked from
141     * NamingContextImpl. It is not a public API. NewContext is in this class
142     * because a Persiten reference has to be created with Persistent NameService
143     * POA.
144     */
145    public NamingContext NewContext( ) throws org.omg.CORBA.SystemException
146    {
147        try
148        {
149                // Get the new Naming Context Key from
150                // the ServantManager
151                String newKey =
152                contextMgr.getNewObjectKey( );
153                // Create the new Naming context and create the Persistent
154                // reference
155                NamingContextImpl theContext =
156                new NamingContextImpl( theorb, newKey,
157                    this, contextMgr );
158                NamingContextImpl tempContext = contextMgr.addContext( newKey,
159                                                 theContext );
160                if( tempContext != null )
161                {
162                        theContext = tempContext;
163                }
164                // If the context is read from the File, The following three entries
165                // will be null. So a fresh setup may be required.
166                theContext.setServantManagerImpl( contextMgr );
167                theContext.setORB( theorb );
168                theContext.setRootNameService( this );
169                NamingContext theNewContext =
170                NamingContextHelper.narrow(
171                nsPOA.create_reference_with_id( newKey.getBytes( ),
172                NamingContextHelper.id( )) );
173                return theNewContext;
174        }
175        catch( org.omg.CORBA.SystemException e )
176        {
177                throw e;
178        }
179        catch( java.lang.Exception e )
180        {
181                //throw e;
182        }
183        return null;
184    }
185
186    /**
187     * getObjectReferenceFromKey returns the Object reference from the objectkey using POA.create_reference_with_id method
188     * @param Object Key as String
189     * @return a CORBA.Object reference.
190     */
191    org.omg.CORBA.Object getObjectReferenceFromKey( String key )
192    {
193        org.omg.CORBA.Object theObject = null;
194        try
195        {
196                theObject = nsPOA.create_reference_with_id( key.getBytes( ), NamingContextHelper.id( ) );
197        }
198        catch (Exception e )
199        {
200                theObject = null;
201        }
202        return theObject;
203    }
204
205    /**
206     * getObjectKey gets the Object Key from the reference using POA.reference_to_id method
207     * @param reference an CORBA.Object.
208     * @return Object Key as String
209     */
210    String getObjectKey( org.omg.CORBA.Object reference )
211    {
212        byte theId[];
213        try
214        {
215                theId = nsPOA.reference_to_id( reference );
216        }
217        catch( org.omg.PortableServer.POAPackage.WrongAdapter e )
218        {
219                return null;
220        }
221        catch( org.omg.PortableServer.POAPackage.WrongPolicy e )
222        {
223                return null;
224        }
225        catch( Exception e )
226        {
227                return null;
228        }
229        String theKey = new String( theId );
230        return theKey;
231    }
232
233
234}
235