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/**
* This file is part of the CRISTAL-iSE kernel.
* Copyright (c) 2001-2014 The CRISTAL Consortium. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* http://www.fsf.org/licensing/licenses/lgpl.html
*/
package com.c2kernel.entity;
import java.util.Map;
import org.omg.PortableServer.POA;
import org.omg.PortableServer.POAManager;
import org.omg.PortableServer.Servant;
import org.omg.PortableServer.POAManagerPackage.AdapterInactive;
import com.c2kernel.common.CannotManageException;
import com.c2kernel.common.InvalidDataException;
import com.c2kernel.common.ObjectAlreadyExistsException;
import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.entity.agent.ActiveEntity;
import com.c2kernel.entity.agent.ActiveLocator;
import com.c2kernel.lookup.AgentPath;
import com.c2kernel.lookup.InvalidAgentPathException;
import com.c2kernel.lookup.ItemPath;
import com.c2kernel.process.Gateway;
import com.c2kernel.utils.Logger;
import com.c2kernel.utils.SoftCache;
/**************************************************************************
*
* $Revision: 1.8 $
* $Date: 2005/10/13 08:13:44 $
*
* Copyright (C) 2003 CERN - European Organization for Nuclear Research
* All rights reserved.
**************************************************************************/
public class CorbaServer {
private final Map<ItemPath, Servant> mItemCache;
private POA mRootPOA;
private POA mItemPOA;
private POA mAgentPOA;
private POAManager mPOAManager;
public CorbaServer() throws InvalidDataException {
mItemCache = new SoftCache<ItemPath, Servant>(50);
// init POA
try {
setupPOA();
mPOAManager.activate();
} catch (Exception ex) {
Logger.error(ex);
throw new InvalidDataException("Error initialising POA");
}
new Thread(new Runnable() {
@Override
public void run() {
Thread.currentThread().setName("ORB Invoker");
Gateway.getORB().run();
}
}).start();
}
public void close() {
try {
mPOAManager.deactivate(true, true);
} catch (AdapterInactive ex) {
Logger.error(ex);
}
}
/**************************************************************************
* Initialises the C2KRootPOA with policies which are suitable for Factory objects
**************************************************************************/
public void setupPOA() throws Exception {
//Initialise the RootPOA
mRootPOA = org.omg.PortableServer.POAHelper.narrow(
Gateway.getORB().resolve_initial_references("RootPOA"));
//Initilaise the default POAManager
mPOAManager = mRootPOA.the_POAManager();
// Create POA for use by the entities
org.omg.CORBA.Policy[] policies = new org.omg.CORBA.Policy[6];
policies[0] = mRootPOA.create_id_assignment_policy(
org.omg.PortableServer.IdAssignmentPolicyValue.USER_ID);
policies[1] = mRootPOA.create_lifespan_policy(
org.omg.PortableServer.LifespanPolicyValue.PERSISTENT);
policies[2] = mRootPOA.create_servant_retention_policy(
org.omg.PortableServer.ServantRetentionPolicyValue.NON_RETAIN);
policies[3] = mRootPOA.create_id_uniqueness_policy(
org.omg.PortableServer.IdUniquenessPolicyValue.UNIQUE_ID);
policies[4] = mRootPOA.create_request_processing_policy(
org.omg.PortableServer.RequestProcessingPolicyValue.
USE_SERVANT_MANAGER);
policies[5] = mRootPOA.create_implicit_activation_policy(
org.omg.PortableServer.ImplicitActivationPolicyValue.
NO_IMPLICIT_ACTIVATION);
mItemPOA = mRootPOA.create_POA( "Item",
mRootPOA.the_POAManager(),
policies );
mAgentPOA = mRootPOA.create_POA( "Agent",
mRootPOA.the_POAManager(),
policies );
//Create the locators
TraceableLocator itemLocator = new TraceableLocator();
mItemPOA.set_servant_manager( itemLocator._this( Gateway.getORB() ) );
ActiveLocator agentLocator = new ActiveLocator();
mAgentPOA.set_servant_manager( agentLocator._this( Gateway.getORB() ) );
}
/**************************************************************************
* Returns a CORBA servant for a pre-existing entity
* @throws ObjectNotFoundException
**************************************************************************/
public TraceableEntity getItem(ItemPath itemPath) throws ObjectNotFoundException {
Servant item = null;
if (!itemPath.exists()) throw new ObjectNotFoundException(itemPath+" does not exist");
synchronized (mItemCache) {
item = mItemCache.get(itemPath);
if (item == null) {
Logger.msg(7, "Creating new servant for "+itemPath);
item = new TraceableEntity(itemPath, mItemPOA);
mItemCache.put(itemPath, item);
}
}
return (TraceableEntity)item;
}
/**************************************************************************
* Returns a CORBA servant for a pre-existing entity
**************************************************************************/
public ActiveEntity getAgent(AgentPath agentPath) throws InvalidAgentPathException, ObjectNotFoundException {
Servant agent = null;
if (!agentPath.exists()) throw new ObjectNotFoundException(agentPath+" does not exist");
synchronized (mItemCache) {
agent = mItemCache.get(agentPath);
if (agent == null) {
Logger.msg(7, "Creating new servant for "+agentPath);
agent = new ActiveEntity(agentPath, mAgentPOA);
mItemCache.put(agentPath, agent);
}
else if (!(agent instanceof ActiveEntity))
throw new InvalidAgentPathException("Item "+agentPath+" was not an agent");
}
return (ActiveEntity)agent;
}
/**
* @param itemPath
* @return
*/
public TraceableEntity createItem(ItemPath itemPath) throws CannotManageException, ObjectAlreadyExistsException {
if (itemPath.exists()) throw new ObjectAlreadyExistsException();
org.omg.CORBA.Object obj = mItemPOA.create_reference_with_id(itemPath.getOID(), ItemHelper.id());
itemPath.setIOR(obj);
TraceableEntity item = new TraceableEntity(itemPath, mItemPOA);
synchronized (mItemCache) {
mItemCache.put(itemPath, item);
}
return item;
}
public ActiveEntity createAgent(AgentPath agentPath) throws CannotManageException, ObjectAlreadyExistsException {
if (agentPath.exists()) throw new ObjectAlreadyExistsException();
org.omg.CORBA.Object obj = mAgentPOA.create_reference_with_id(agentPath.getOID(), AgentHelper.id());
agentPath.setIOR(obj);
ActiveEntity agent;
agent = new ActiveEntity(agentPath, mAgentPOA);
synchronized (mItemCache) {
mItemCache.put(agentPath, agent);
}
return agent;
}
}
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