File	Doc	Category	Size	Date	Package
NameService.java	API Doc	Java SE 5 API	6714	Fri Aug 26 14:54:26 BST 2005	com.sun.corba.se.impl.naming.pcosnaming

NameService

• java.lang.Object

Fields Summary
private org.omg.CosNaming.NamingContext	rootContext
private org.omg.PortableServer.POA	nsPOA
private ServantManagerImpl	contextMgr
private com.sun.corba.se.spi.orb.ORB	theorb

Constructors Summary

public NameService(com.sun.corba.se.spi.orb.ORB orb, File logDir) Create NameService which starts the Root Naming Context in Persistent CosNaming param orb an ORB object. param logDir a File exception java.lang.Exception a Java exception. theorb = orb; // Moved this to the creation of the ORB that is passed into this // constructor. // // This is required for creating Persistent Servants under this ORB // Right now the Persistent NameService and ORBD are launched together // Find out a better way of doing this, Since ORBD is an important // process which should not be killed because of some external process // orb.setPersistentServerId( (int) 1000 ); // get and activate the root naming POA POA rootPOA = (POA)orb.resolve_initial_references( ORBConstants.ROOT_POA_NAME ) ; rootPOA.the_POAManager().activate(); // create a new POA for persistent Naming Contexts // With Non-Retain policy, So that every time Servant Manager // will be contacted when the reference is made for the context // The id assignment is made by the NameServer, The Naming Context // id's will be in the format NC<Index> int i=0; Policy[] poaPolicy = new Policy[4]; poaPolicy[i++] = rootPOA.create_lifespan_policy( LifespanPolicyValue.PERSISTENT); poaPolicy[i++] = rootPOA.create_request_processing_policy( RequestProcessingPolicyValue.USE_SERVANT_MANAGER); poaPolicy[i++] = rootPOA.create_id_assignment_policy( IdAssignmentPolicyValue.USER_ID); poaPolicy[i++] = rootPOA.create_servant_retention_policy( ServantRetentionPolicyValue.NON_RETAIN); nsPOA = rootPOA.create_POA("NameService", null, poaPolicy); nsPOA.the_POAManager().activate( ); // create and set the servant manager contextMgr = new ServantManagerImpl(orb, logDir, this ); // The RootObject key will be NC0 String rootKey = contextMgr.getRootObjectKey( ); // initialize the root Naming Context NamingContextImpl nc = new NamingContextImpl( orb, rootKey, this, contextMgr ); nc = contextMgr.addContext( rootKey, nc ); nc.setServantManagerImpl( contextMgr ); nc.setORB( orb ); nc.setRootNameService( this ); nsPOA.set_servant_manager(contextMgr); rootContext = NamingContextHelper.narrow( nsPOA.create_reference_with_id( rootKey.getBytes( ), NamingContextHelper.id( ) ) );

Methods Summary
public org.omg.CosNaming.NamingContext	NewContext() This method creates a NewContext, This will internally invoked from NamingContextImpl. It is not a public API. NewContext is in this class because a Persiten reference has to be created with Persistent NameService POA. try { // Get the new Naming Context Key from // the ServantManager String newKey = contextMgr.getNewObjectKey( ); // Create the new Naming context and create the Persistent // reference NamingContextImpl theContext = new NamingContextImpl( theorb, newKey, this, contextMgr ); NamingContextImpl tempContext = contextMgr.addContext( newKey, theContext ); if( tempContext != null ) { theContext = tempContext; } // If the context is read from the File, The following three entries // will be null. So a fresh setup may be required. theContext.setServantManagerImpl( contextMgr ); theContext.setORB( theorb ); theContext.setRootNameService( this ); NamingContext theNewContext = NamingContextHelper.narrow( nsPOA.create_reference_with_id( newKey.getBytes( ), NamingContextHelper.id( )) ); return theNewContext; } catch( org.omg.CORBA.SystemException e ) { throw e; } catch( java.lang.Exception e ) { //throw e; } return null;
org.omg.PortableServer.POA	getNSPOA() This method returns nsPOA which is the only POA that we use for Persistent Naming Contexts. return nsPOA;
java.lang.String	getObjectKey(org.omg.CORBA.Object reference) getObjectKey gets the Object Key from the reference using POA.reference_to_id method param reference an CORBA.Object. returns Object Key as String byte theId[]; try { theId = nsPOA.reference_to_id( reference ); } catch( org.omg.PortableServer.POAPackage.WrongAdapter e ) { return null; } catch( org.omg.PortableServer.POAPackage.WrongPolicy e ) { return null; } catch( Exception e ) { return null; } String theKey = new String( theId ); return theKey;
org.omg.CORBA.Object	getObjectReferenceFromKey(java.lang.String key) getObjectReferenceFromKey returns the Object reference from the objectkey using POA.create_reference_with_id method param Object Key as String returns reference an CORBA.Object. org.omg.CORBA.Object theObject = null; try { theObject = nsPOA.create_reference_with_id( key.getBytes( ), NamingContextHelper.id( ) ); } catch (Exception e ) { theObject = null; } return theObject;
public org.omg.CosNaming.NamingContext	initialNamingContext() This method returns the Root Naming Context return rootContext;