1 /*
2 * Copyright (c) 1999, 2003, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
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).
16 *
17 * You should have received a copy of the GNU General Public License version
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.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.corba.se.impl.naming.pcosnaming;
27
28 import java.io.File;
29 import java.util.Properties;
30
31 import org.omg.CORBA.Policy;
32 import org.omg.PortableServer.POA;
33 import org.omg.PortableServer.LifespanPolicyValue;
34 import org.omg.PortableServer.RequestProcessingPolicyValue;
35 import org.omg.PortableServer.IdAssignmentPolicyValue;
36 import org.omg.PortableServer.ServantRetentionPolicyValue;
37 import org.omg.CosNaming.NamingContext;
38 import org.omg.CosNaming.NamingContextHelper;
39 import org.omg.PortableServer.*;
40
41 import com.sun.corba.se.spi.orb.ORB ;
42
43 import com.sun.corba.se.impl.orbutil.ORBConstants ;
44
45 /**
46 * @author Hemanth Puttaswamy
47 * @since JDK1.2
48 */
49
50 public 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 * @returns reference an CORBA.Object.
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 * @returns 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 }