fr.dyade.aaa.jndi2.server.RequestManager Maven / Gradle / Ivy
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/*
* JORAM: Java(TM) Open Reliable Asynchronous Messaging
* Copyright (C) 2001 - 2008 ScalAgent Distributed Technologies
* Copyright (C) 1996 - Dyade
*
* 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 2.1 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without 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.
*
* Initial developer(s): David Feliot
*/
package fr.dyade.aaa.jndi2.server;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import javax.naming.Binding;
import javax.naming.NameClassPair;
import javax.naming.NamingException;
import org.objectweb.util.monolog.api.BasicLevel;
import fr.dyade.aaa.agent.AgentId;
import fr.dyade.aaa.agent.AgentServer;
import fr.dyade.aaa.agent.Notification;
import fr.dyade.aaa.jndi2.impl.MissingContextException;
import fr.dyade.aaa.jndi2.impl.MissingRecordException;
import fr.dyade.aaa.jndi2.impl.NotOwnerException;
import fr.dyade.aaa.jndi2.impl.ObjectRecord;
import fr.dyade.aaa.jndi2.impl.Record;
import fr.dyade.aaa.jndi2.impl.ServerImpl;
import fr.dyade.aaa.jndi2.msg.BindRequest;
import fr.dyade.aaa.jndi2.msg.ChangeOwnerRequest;
import fr.dyade.aaa.jndi2.msg.CreateSubcontextRequest;
import fr.dyade.aaa.jndi2.msg.DestroySubcontextRequest;
import fr.dyade.aaa.jndi2.msg.JndiAdminRequest;
import fr.dyade.aaa.jndi2.msg.JndiError;
import fr.dyade.aaa.jndi2.msg.JndiReadRequest;
import fr.dyade.aaa.jndi2.msg.JndiReply;
import fr.dyade.aaa.jndi2.msg.JndiRequest;
import fr.dyade.aaa.jndi2.msg.ListBindingsReply;
import fr.dyade.aaa.jndi2.msg.ListBindingsRequest;
import fr.dyade.aaa.jndi2.msg.ListReply;
import fr.dyade.aaa.jndi2.msg.ListRequest;
import fr.dyade.aaa.jndi2.msg.LookupReply;
import fr.dyade.aaa.jndi2.msg.LookupRequest;
import fr.dyade.aaa.jndi2.msg.UnbindRequest;
public class RequestManager implements LifeCycleListener, Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private Container container;
private transient ServerImpl impl;
public void setContainer(Container container) {
this.container = container;
}
public final AgentId getId() {
return container.getId();
}
public void sendTo(AgentId to, Notification not) {
container.sendNotification(to, not);
}
public void agentInitialize(boolean firstTime) throws Exception {
if (Trace.logger.isLoggable(BasicLevel.DEBUG))
Trace.logger.log(BasicLevel.DEBUG,
"\n\nRequestManager.agentInitialize(" +
firstTime + ')');
// Create the object that handles the
// naming data.
impl = new ServerImpl(
AgentServer.getTransaction(),
getId(),
getRootOwnerId());
impl.initialize();
}
public void agentFinalize(boolean lastTime) {}
/**
* Returns the root naming context owner identifier.
* May be overridden by a subclass.
*/
protected AgentId getRootOwnerId() {
return getId();
}
protected final ServerImpl getServerImpl() {
return impl;
}
public JndiReply invoke(RequestContext reqCtx) {
if (Trace.logger.isLoggable(BasicLevel.DEBUG))
Trace.logger.log(BasicLevel.DEBUG,
"RequestManager.invoke(" + reqCtx + ')');
JndiRequest request = reqCtx.getRequest();
try {
if (request instanceof JndiReadRequest) {
// 1- Dispatch the read requests
return invokeReadRequest(reqCtx);
} else if (request instanceof JndiAdminRequest) {
return invokeAdminRequest(reqCtx);
} else {
// 2- Dispatch the write requests
return invokeWriteRequest(reqCtx);
}
} catch (MissingContextException mce) {
if (Trace.logger.isLoggable(BasicLevel.DEBUG))
Trace.logger.log(BasicLevel.DEBUG, "", mce);
return onMissingContext(mce, reqCtx);
} catch (MissingRecordException nnfe) {
if (Trace.logger.isLoggable(BasicLevel.DEBUG))
Trace.logger.log(BasicLevel.DEBUG, "", nnfe);
return onMissingRecord(nnfe, reqCtx);
} catch (NamingException nexc) {
if (Trace.logger.isLoggable(BasicLevel.DEBUG))
Trace.logger.log(BasicLevel.DEBUG, "", nexc);
return new JndiError(nexc);
}
}
protected JndiReply invokeReadRequest(RequestContext reqCtx)
throws NamingException {
if (Trace.logger.isLoggable(BasicLevel.DEBUG))
Trace.logger.log(BasicLevel.DEBUG,
"RequestManager.invokeReadRequest(" + reqCtx + ')');
JndiRequest request = reqCtx.getRequest();
if (request instanceof LookupRequest) {
Object obj = lookup((LookupRequest)request);
if (obj != null) {
ObjectRecord or = (ObjectRecord)obj;
return new LookupReply(or.getObject());
}
// This is a context record
return new JndiReply();
} else if (request instanceof ListBindingsRequest) {
Object obj = listBindings((ListBindingsRequest)request);
return new ListBindingsReply((Binding[])obj);
} else if (request instanceof ListRequest) {
Object obj = list((ListRequest)request);
return new ListReply((NameClassPair[])obj);
} else {
return new JndiError(
new NamingException("Unknown operation"));
}
}
protected JndiReply invokeWriteRequest(
RequestContext reqCtx)
throws NamingException {
if (Trace.logger.isLoggable(BasicLevel.DEBUG))
Trace.logger.log(BasicLevel.DEBUG,
"RequestManager.invokeWriteRequest(" + reqCtx + ',' + ')');
try {
JndiRequest request = reqCtx.getRequest();
if (request instanceof BindRequest) {
bind((BindRequest)request);
return new JndiReply();
} else if (request instanceof UnbindRequest) {
unbind((UnbindRequest)request);
return new JndiReply();
} else if (request instanceof CreateSubcontextRequest) {
createSubcontext((CreateSubcontextRequest)request);
return new JndiReply();
} else if (request instanceof DestroySubcontextRequest) {
destroySubcontext((DestroySubcontextRequest)request);
return new JndiReply();
} else {
return new JndiError(new NamingException("Unknown operation"));
}
} catch (NotOwnerException noexc) {
if (Trace.logger.isLoggable(BasicLevel.DEBUG))
Trace.logger.log(BasicLevel.DEBUG, "", noexc);
return invokeOwner(
(AgentId)noexc.getOwner(),
reqCtx);
}
}
protected JndiReply invokeAdminRequest(RequestContext reqCtx) throws NamingException {
JndiRequest request = reqCtx.getRequest();
if (request instanceof ChangeOwnerRequest) {
changeOwner((ChangeOwnerRequest)request);
return new JndiReply();
}
return new JndiError(new NamingException("Unknown admin operation"));
}
private void bind(BindRequest request) throws NamingException {
if (request.isRebind()) {
impl.rebind(
request.getName(),
request.getObject());
} else {
impl.bind(
request.getName(),
request.getObject());
}
}
private void unbind(UnbindRequest request) throws NamingException {
impl.unbind(request.getName());
}
private Record lookup(LookupRequest request) throws NamingException {
return impl.lookup(request.getName());
}
private NameClassPair[] list(ListRequest request) throws NamingException {
return impl.list(request.getName());
}
private Binding[] listBindings(ListBindingsRequest request) throws NamingException {
return impl.listBindings(request.getName());
}
protected void createSubcontext(CreateSubcontextRequest request) throws NamingException {
impl.createSubcontext(
request.getName());
}
private void destroySubcontext(DestroySubcontextRequest request) throws NamingException {
impl.destroySubcontext(
request.getName());
}
protected void changeOwner(ChangeOwnerRequest request) throws NamingException {
AgentId newOwnerId;
try {
newOwnerId =
AgentId.fromString(request.getOwnerId());
} catch (Exception exc) {
NamingException ne =
new NamingException(exc.toString());
ne.setRootCause(exc);
throw ne;
}
if (getId().equals(newOwnerId))
throw new NamingException("Server already owner");
impl.changeOwner(request.getName(), newOwnerId);
}
/**
* A centralized JNDI server returns a JNDI error
* explaining that this server is not the owner
* of the context on which the JNDI operation is called.
* A subclass may override this behavior in order
* to invoke the owner of the naming context.
*
* @param owner the identifier of the naming server that
* owns the naming context on which the
* JNDI operation is called.
*
* @param reqCtx the JNDI request context that raised
* the exception.
*
* @return the JNDI reply.
* May be null if the owner invocation
* is asynchronous.
*/
protected JndiReply invokeOwner(AgentId owner,
RequestContext reqCtx) {
if (Trace.logger.isLoggable(BasicLevel.DEBUG))
Trace.logger.log(BasicLevel.DEBUG, "RequestManager.invokeOwner(" +
owner + ',' + reqCtx + ')');
return new JndiError(new NamingException("Not owner"));
}
/**
* In a centralized JNDI server a missing context shows
* that the naming data are unconsistent. So it throws an error.
* A subclass may override this behavior in order
* to try to resolve the missing context.
*
* @param mce the missing context exception
*
* @param reqCtx the JNDI request context that raised
* the exception.
*
* @return the JNDI reply.
* May be null if the resolution is asynchronous.
*/
protected JndiReply onMissingContext(MissingContextException mce,
RequestContext reqCtx) {
if (Trace.logger.isLoggable(BasicLevel.DEBUG))
Trace.logger.log(BasicLevel.DEBUG, "RequestManager.onMissingContext(" +
mce + ',' + reqCtx + ')');
throw new Error(mce.toString());
}
/**
* In a centralized JNDI server a missing record shows that the
* name asked by the JNDI request doesn't exist. So the
* NameNotFoundException is directly forwarded to
* the client.
* A subclass may override this behavior in order
* to try to resolve the missing record.
*
* @param mre the missing context exception
*
* @param reqCtx the JNDI request context that raised
* the exception.
*
* @return the JNDI reply.
* May be null if the resolution is asynchronous.
*/
protected JndiReply onMissingRecord(MissingRecordException mre,
RequestContext reqCtx) {
if (Trace.logger.isLoggable(BasicLevel.DEBUG))
Trace.logger.log(BasicLevel.DEBUG, "RequestManager.onMissingRecord(" +
mre + ',' + reqCtx + ')');
return new JndiError(mre.getNameNotFoundException());
}
public void writeBag(ObjectOutputStream out)
throws IOException {
impl.writeBag(out);
}
public void readBag(ObjectInputStream in)
throws IOException, ClassNotFoundException {
impl = new ServerImpl(
AgentServer.getTransaction(),
getId(),
getRootOwnerId());
impl.readBag(in);
}
}
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