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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2006-2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
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*/
package com.sun.enterprise.naming.impl;
import javax.naming.*;
import java.io.Serializable;
import java.util.*;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import java.util.logging.Level;
import static com.sun.enterprise.naming.util.LogFacade.logger;
/**
* Class to implement multiple level of subcontexts in SerialContext. To use this
* class a new object of class InitialContext (env) should be instantiated.
* The env i.e the Environment is initialised with SerialInitContextFactory
* An example for using this is in /test/subcontext
*/
public class TransientContext implements Context, Serializable {
Hashtable myEnv;
private Map bindings = new HashMap();
static NameParser myParser = new SerialNameParser();
// Issue 7067: lots of lookup failures in a heavily concurrent client.
// So add a read/write lock, which allows unlimited concurrent readers,
// and only imposes a global lock on relatively infrequent updates.
private static final ReadWriteLock lock = new ReentrantReadWriteLock() ;
public TransientContext() {
}
/**
* Create a subcontext with the specified name.
*
* @return the created subcontext.
* @throws NamingException if there is a naming exception.
*/
@Override
public Context createSubcontext(String name) throws NamingException {
return drillDownAndCreateSubcontext(name);
}
/**
* Create a subcontext with the specified name.
*
* @return the created subcontext.
* @throws NamingException if there is a naming exception.
*/
@Override
public Context createSubcontext(Name name) throws NamingException {
return createSubcontext(name.toString());
}
/**
* Destroy the subcontext with the specified name.
*
* @throws NamingException if there is a naming exception.
*/
@Override
public void destroySubcontext(String name) throws NamingException {
drillDownAndDestroySubcontext(name);
}
/**
* Destroy the subcontext with the specified name.
*
* @throws NamingException if there is a naming exception.
*/
@Override
public void destroySubcontext(Name name) throws NamingException {
destroySubcontext(name.toString());
}
/**
* Handles making nested subcontexts
* i.e. if you want abcd/efg/hij. It will go subcontext efg in abcd
* (if not present already - it will create it) and then
* make subcontext hij
*
* @return the created subcontext.
* @throws NamingException if there is a Naming exception
*/
private Context drillDownAndCreateSubcontext(String name)
throws NamingException {
lock.writeLock().lock() ;
try {
Name n = new CompositeName(name);
if (n.size() <= 1) { // bottom
if (bindings.containsKey(name)) {
throw new NameAlreadyBoundException("Subcontext " +
name + " already present");
}
TransientContext ctx = null;
ctx = new TransientContext();
bindings.put(name, ctx);
return ctx;
} else {
String suffix = n.getSuffix(1).toString();
Context retCtx, ctx; // the created context
try {
ctx = resolveContext(n.get(0));
} catch (NameNotFoundException e) {
ctx = new TransientContext();
}
retCtx = ctx.createSubcontext(suffix);
bindings.put(n.get(0), ctx);
return retCtx;
}
} finally {
lock.writeLock().unlock();
}
}
/**
* Handles deleting nested subcontexts
* i.e. if you want delete abcd/efg/hij. It will go subcontext efg in abcd
* it will delete it) and then delete subcontext hij
*
* @throws NamingException if there is a naming exception
*/
private void drillDownAndDestroySubcontext(String name)
throws NamingException {
lock.writeLock().lock();
try {
Name n = new CompositeName(name);
if (n.size() < 1) {
throw new InvalidNameException("Cannot destoy empty subcontext");
}
if (n.size() == 1) { // bottom
if (bindings.containsKey(name)) {
bindings.remove(name);
} else {
throw new NameNotFoundException("Subcontext: " + name +
" not found");
}
} else {
String suffix = n.getSuffix(1).toString();
Context ctx; // the context to drill down from
ctx = resolveContext(n.get(0));
ctx.destroySubcontext(suffix);
}
} finally {
lock.writeLock().unlock();
}
}
/**
* Lookup the specified name.
*
* @return the object or context bound to the name.
* @throws NamingException if there is a naming exception.
* @throws java.rmi.RemoteException if there is an RMI exception.
*/
@Override
public Object lookup(String name) throws NamingException {
lock.readLock().lock() ;
try {
Name n = new CompositeName(name);
if (n.size() < 1) {
throw new InvalidNameException("Cannot bind empty name");
}
if (n.size() == 1) { // bottom
return doLookup(n.toString());
} else {
String suffix = n.getSuffix(1).toString();
TransientContext ctx = resolveContext(n.get(0));
return ctx.lookup(suffix);
}
} finally {
lock.readLock().unlock();
}
}
/**
* Lookup the specified name.
*
* @return the object or context bound to the name.
* @throws NamingException if there is a naming exception.
* @throws java.rmi.RemoteException if there is an RMI exception.
*/
@Override
public Object lookup(Name name) throws NamingException {
return lookup(name.toString());
}
/**
* Lookup the specified name in the current objects hashtable.
*
* @return the object or context bound to the name.
* @throws NamingException if there is a naming exception.
* @throws java.rmi.RemoteException if there is an RMI exception.
*/
private Object doLookup(String name) throws NamingException {
Object answer = bindings.get(name);
if (answer == null) {
throw new NameNotFoundException(name + " not found");
}
return answer;
}
/**
* Bind the object to the specified name.
*
* @throws NamingException if there is a naming exception.
* @throws java.rmi.RemoteException if there is an RMI exception.
*/
@Override
public void bind(String name, Object obj) throws NamingException {
lock.writeLock().lock();
try {
Name n = new CompositeName(name);
if (n.size() < 1) {
throw new InvalidNameException("Cannot bind empty name");
}
if (n.size() == 1) { // bottom
doBindOrRebind(n.toString(), obj, false);
} else {
String suffix = n.getSuffix(1).toString();
Context ctx;
try {
ctx = resolveContext(n.get(0));
} catch (NameNotFoundException e) {
ctx = createSubcontext(n.get(0));
}
ctx.bind(suffix, obj);
}
} finally {
lock.writeLock().unlock();
}
}
/**
* Bind the object to the specified name.
*
* @throws NamingException if there is a naming exception.
* @throws java.rmi.RemoteException if there is an RMI exception.
*/
@Override
public void bind(Name name, Object obj)
throws NamingException {
bind(name.toString(), obj);
}
/**
* Finds out if the subcontext specified is present in the current context
*
* @throws NamingException if there is a naming exception
* @throws java.rmi.RemoteException if there is a RMI exception
*/
/* Finds if the name searched for is a type of context or anyother type of
* object.
*/
private TransientContext resolveContext(String s) throws NamingException {
//TransientContext ctx = (TransientContext) bindings.get(s);
TransientContext ctx;
Object obj = bindings.get(s);
if (obj == null) {
throw new NameNotFoundException(s);
}
if (obj instanceof TransientContext) {
ctx = (TransientContext) obj;
} else {
throw new NameAlreadyBoundException(s);
}
return ctx;
}
/**
* Binds or rebinds the object specified by name
*
* @throws NamingException if there is a naming exception
* @throws java.rmi.RemoteException if there is a RMI exception
*/
private void doBindOrRebind(String name, Object obj, boolean rebind)
throws NamingException {
if (name.equals("")) {
throw new InvalidNameException("Cannot bind empty name");
}
if (!rebind) {
if (bindings.get(name) != null) {
throw new NameAlreadyBoundException(
"Use rebind to override");
}
}
bindings.put(name, obj);
}
/**
* Rebinds the object specified by name
*
* @throws NamingException if there is a naming exception
* @throws java.rmi.RemoteException if there is a RMI exception
*/
@Override
public void rebind(String name, Object obj)
throws NamingException {
lock.writeLock().lock();
try {
Name n = new CompositeName(name);
if (n.size() < 1) {
throw new InvalidNameException("Cannot bind empty name");
}
if (n.size() == 1) { // bottom
doBindOrRebind(n.toString(), obj, true);
} else {
String suffix = n.getSuffix(1).toString();
Context ctx = null;
try {
ctx = resolveContext(n.get(0));
ctx.rebind(suffix, obj);
} catch (NameNotFoundException e) {
ctx = createSubcontext(n.get(0));
ctx.rebind(suffix, obj);
}
}
} finally {
lock.writeLock().unlock();
}
}
/**
* Binds or rebinds the object specified by name
*
* @throws NamingException if there is a naming exception
* @throws java.rmi.RemoteException if there is a RMI exception
*/
@Override
public void rebind(Name name, Object obj)
throws NamingException {
rebind(name.toString(), obj);
}
/**
* Unbinds the object specified by name. Traverses down the context tree
* and unbinds the object if required.
*
* @throws NamingException if there is a naming exception
* @throws java.rmi.RemoteException if there is a RMI exception
*/
private void doUnbind(String name) throws NamingException {
if (name.equals("")) {
throw new InvalidNameException("Cannot unbind empty name");
}
// After checking javadoc of Context.unbind(),I think we need not throw
// NameNotFoundException here.
/*if (bindings.get(name) == null) {
throw new NameNotFoundException(
"Cannot find name to unbind");
}*/
bindings.remove(name);
}
/**
* Unbinds the object specified by name. Calls itself recursively to
* traverse down the context tree and unbind the object.
*
* @throws NamingException if there is a naming exception
* @throws java.rmi.RemoteException if there is a RMI exception
*/
@Override
public void unbind(String name) throws NamingException {
lock.writeLock().lock();
try {
Name n = new CompositeName(name);
if (n.size() < 1) {
throw new InvalidNameException("Cannot unbind empty name");
}
if (n.size() == 1) { // bottom
doUnbind(n.toString());
} else {
String suffix = n.getSuffix(1).toString();
TransientContext ctx = resolveContext(n.get(0));
ctx.unbind(suffix);
}
} finally {
lock.writeLock().unlock();
}
}
/**
* Unbinds the object specified by name
*
* @throws NamingException if there is a naming exception
* @throws java.rmi.RemoteException if there is a RMI exception
*/
@Override
public void unbind(Name name)
throws NamingException {
unbind(name.toString());
}
/**
* Rename the object specified by oldname to newname
*
* @throws NamingException if there is a naming exception
* @throws java.rmi.RemoteException if there is a RMI exception
*/
@Override
public void rename(Name oldname, Name newname) throws NamingException {
rename(oldname.toString(), newname.toString());
}
/**
* Rename the object specified by oldname to newname
*
* @throws NamingException if there is a naming exception
* @throws java.rmi.RemoteException if there is a RMI exception
*/
@Override
public void rename(String oldname, String newname)
throws NamingException {
if (oldname.equals("") || newname.equals("")) {
throw new InvalidNameException("Cannot rename empty name");
}
lock.writeLock().lock() ;
try {
// Check if new name exists
if (bindings.get(newname) != null) {
throw new NameAlreadyBoundException(newname +
" is already bound");
}
// Check if old name is bound
Object oldBinding = bindings.remove(oldname);
if (oldBinding == null) {
throw new NameNotFoundException(oldname + " not bound");
}
bindings.put(newname, oldBinding);
} finally {
lock.writeLock().unlock();
}
}
/**
* list the objects stored by the current context
*
* @throws NamingException if there is a naming exception
* @throws java.rmi.RemoteException if there is a RMI exception
*/
public Hashtable list() {
lock.readLock().lock();
try {
return new Hashtable(bindings);
} finally {
lock.readLock().unlock();
}
}
/**
* List the objects specified by name.
*
* @throws NamingException if there is a naming exception
* @throws java.rmi.RemoteException if there is a RMI exception
*/
public Hashtable listContext(String name) throws NamingException {
lock.readLock().lock();
try {
if (logger.isLoggable(Level.FINE)) {
print(bindings);
}
if (name.equals("")) {
return new Hashtable(bindings);
}
Object target = lookup(name);
if (target instanceof TransientContext) {
return ((TransientContext) target).listContext("");
}
throw new NotContextException(name + " cannot be listed");
} finally {
lock.readLock().unlock();
}
}
/**
* List the objects specified by name.
*
* @throws NamingException if there is a naming exception
*/
@Override
public NamingEnumeration list(Name name) throws NamingException {
return list(name.toString());
}
/**
* List the objects specified by name.
*
* @throws NamingException if there is a naming exception
*/
@Override
public NamingEnumeration list(String name) throws NamingException {
lock.readLock().lock() ;
try {
if (logger.isLoggable(Level.FINE)) {
print(bindings);
}
if (name.equals("")) {
return new RepNames(new Hashtable(bindings));
}
Object target = lookup(name);
if (target instanceof Context) {
return ((Context) target).list("");
}
throw new NotContextException(name + " cannot be listed");
} finally {
lock.readLock().unlock();
}
}
/**
* List the bindings of objects present in name.
*
* @throws NamingException if there is a naming exception
*/
@Override
public NamingEnumeration listBindings(String name) throws NamingException {
lock.readLock().lock() ;
try {
if (name.equals("")) {
return new RepBindings(new Hashtable(bindings));
}
Object target = lookup(name);
if (target instanceof Context) {
return ((Context) target).listBindings("");
}
throw new NotContextException(name + " cannot be listed");
} finally {
lock.readLock().unlock();
}
}
/**
* List the binding of objects specified by name.
*
* @throws NamingException if there is a naming exception
*/
@Override
public NamingEnumeration listBindings(Name name) throws NamingException {
return listBindings(name.toString());
}
/**
* Lookup the name.
*
* @throws NamingException if there is a naming exception
*/
@Override
public Object lookupLink(String name) throws NamingException {
// This flat context does not treat links specially
return lookup(name);
}
/**
* Lookup name.
*
* @throws NamingException if there is a naming exception
*/
@Override
public Object lookupLink(Name name) throws NamingException {
// Flat namespace; no federation; just call string version
return lookupLink(name.toString());
}
/**
* List the NameParser specified by name.
*
* @throws NamingException if there is a naming exception
*/
@Override
public NameParser getNameParser(String name) throws NamingException {
return myParser;
}
/**
* List the NameParser specified by name.
*
* @throws NamingException if there is a naming exception
*/
@Override
public NameParser getNameParser(Name name) throws NamingException {
// Flat namespace; no federation; just call string version
return getNameParser(name.toString());
}
/**
* Compose a new name specified by name and prefix.
*
* @return null
* @throws NamingException if there is a naming exception
*/
@Override
public String composeName(String name, String prefix)
throws NamingException {
return null;
}
/**
* Compose a new name specified by name and prefix.
*
* @return Name result of the concatenation
* @throws NamingException if there is a naming exception
*/
@Override
public Name composeName(Name name, Name prefix)
throws NamingException {
Name result = (Name) (prefix.clone());
result.addAll(name);
return result;
}
/**
* Add the property name and value to the environment.
*
* @throws NamingException if there is a naming exception
*/
@Override
public Object addToEnvironment(String propName, Object propVal)
throws NamingException {
lock.writeLock().lock() ;
try {
if (myEnv == null) {
myEnv = new Hashtable(5, 0.75f);
}
return myEnv.put(propName, propVal);
} finally {
lock.writeLock().unlock();
}
}
/**
* Remove property from the environment.
*
* @throws NamingException if there is a naming exception
*/
@Override
public Object removeFromEnvironment(String propName)
throws NamingException {
lock.writeLock().lock() ;
try {
if (myEnv == null) {
return null;
}
return myEnv.remove(propName);
} finally {
lock.writeLock().unlock();
}
}
/**
* List the current environment.
*
* @throws NamingException if there is a naming exception
*/
@Override
public Hashtable getEnvironment() throws NamingException {
lock.writeLock().lock() ;
try {
if (myEnv == null) {
// Must return non-null
myEnv = new Hashtable(3, 0.75f);
}
return myEnv;
} finally {
lock.writeLock().unlock();
}
}
/**
* Invalidate the current environment.
*/
@Override
public void close() throws NamingException {
myEnv = null;
}
/**
* Operation not supported.
*/
@Override
public String getNameInNamespace() throws NamingException {
throw new OperationNotSupportedException("getNameInNamespace() " +
"not implemented");
}
/**
* Print the current hashtable. Should only be invoked for FINE Level logging.
*/
private static void print(Map ht) {
for (Map.Entry entry : ht.entrySet()) {
Object value = entry.getValue();
logger.log(Level.FINE, "[{0}, {1}:{2}]",
new Object[]{entry.getKey(), value, value.getClass().getName()});
// END OF IASRI 4660742
}
}
// Class for enumerating name/class pairs
static class RepNames implements NamingEnumeration {
private Map nameToClassName =
new HashMap() ;
private Iterator iter ;
RepNames(Hashtable bindings) {
Set names = new HashSet() ;
for (Object str : bindings.keySet()) {
names.add( (String)str ) ;
}
iter = names.iterator() ;
for (Object obj : bindings.entrySet() ) {
Map.Entry entry = (Map.Entry)obj ;
nameToClassName.put( (String)entry.getKey(),
entry.getValue().getClass().getName()) ;
}
}
@Override
public boolean hasMoreElements() {
return iter.hasNext();
}
@Override
public boolean hasMore() throws NamingException {
return hasMoreElements();
}
@Override
public T nextElement() {
if (iter.hasNext()) {
String name = iter.next();
String className = nameToClassName.get(name) ;
return (T) (new NameClassPair(name, className));
} else {
return null;
}
}
@Override
public T next() throws NamingException {
return nextElement();
}
@Override
public void close() {
//no-op since no steps needed to free up resources
}
}
// Class for enumerating bmesindings
static class RepBindings implements NamingEnumeration {
Enumeration names;
Hashtable bindings;
RepBindings(Hashtable bindings) {
this.bindings = bindings;
this.names = bindings.keys();
}
@Override
public boolean hasMoreElements() {
return names.hasMoreElements();
}
@Override
public boolean hasMore() throws NamingException {
return hasMoreElements();
}
@Override
public T nextElement() {
if (hasMoreElements()) {
String name = (String) names.nextElement();
return (T) (new Binding(name, bindings.get(name)));
} else {
return null;
}
}
@Override
public T next() throws NamingException {
return nextElement();
}
@Override
public void close() {
//no-op since no steps needed to free up resources
}
}
}