/*
* JBoss, Home of Professional Open Source.
* Copyright 2010, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This 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 (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.naming;
import org.jboss.as.naming.context.ObjectFactoryBuilder;
import org.jboss.as.naming.util.NameParser;
import javax.naming.Binding;
import javax.naming.CannotProceedException;
import javax.naming.CompositeName;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.LinkRef;
import javax.naming.Name;
import javax.naming.NameClassPair;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.Reference;
import javax.naming.event.EventContext;
import javax.naming.event.NamingListener;
import javax.naming.spi.NamingManager;
import javax.naming.spi.ObjectFactory;
import javax.naming.spi.ResolveResult;
import java.util.Arrays;
import java.util.Hashtable;
import static org.jboss.as.naming.NamingLogger.ROOT_LOGGER;
import static org.jboss.as.naming.NamingMessages.MESSAGES;
import static org.jboss.as.naming.util.NamingUtils.isEmpty;
import static org.jboss.as.naming.util.NamingUtils.namingEnumeration;
import static org.jboss.as.naming.util.NamingUtils.namingException;
import static org.jboss.as.naming.util.NamingUtils.notAContextException;
/**
* Naming context implementation which proxies calls to a {@code NamingStore} instance. This context is
* read-only.
*
* @author John E. Bailey
*/
public class NamingContext implements EventContext {
/*
* The active naming store to use for any context created without a name store.
*/
private static NamingStore ACTIVE_NAMING_STORE = new InMemoryNamingStore();
/**
* Set the active naming store
*
* @param namingStore The naming store
*/
public static void setActiveNamingStore(final NamingStore namingStore) {
ACTIVE_NAMING_STORE = namingStore;
}
private static final String PACKAGE_PREFIXES = "org.jboss.as.naming.interfaces";
static {
try {
NamingManager.setObjectFactoryBuilder(ObjectFactoryBuilder.INSTANCE);
} catch(Throwable t) {
ROOT_LOGGER.failedToSet(t, "ObjectFactoryBuilder");
}
}
/**
* Initialize the naming components required by {@link javax.naming.spi.NamingManager}.
*/
public static void initializeNamingManager() {
// Setup naming environment
final String property = SecurityActions.getSystemProperty(Context.URL_PKG_PREFIXES);
if(property == null || property.isEmpty()) {
SecurityActions.setSystemProperty(Context.URL_PKG_PREFIXES, PACKAGE_PREFIXES);
} else if(!Arrays.asList(property.split(":")).contains(PACKAGE_PREFIXES)) {
SecurityActions.setSystemProperty(Context.URL_PKG_PREFIXES, PACKAGE_PREFIXES + ":" + property);
}
try {
//If we are reusing the JVM. e.g. in tests we should not set this again
if (!NamingManager.hasInitialContextFactoryBuilder())
NamingManager.setInitialContextFactoryBuilder(new InitialContextFactoryBuilder());
} catch (NamingException e) {
ROOT_LOGGER.failedToSet(e, "InitialContextFactoryBuilder");
}
}
/* The naming store providing the back-end storage */
private final NamingStore namingStore;
/* The name prefix the context represents. */
private final Name prefix;
/* The environment configuration */
private final Hashtable<String, Object> environment;
/**
* Create a new naming context with no prefix or naming store. This will default to a prefix of "" and
* the active naming store.
*
* @param environment The naming environment
*/
public NamingContext(final Hashtable<String, Object> environment) {
this(new CompositeName(), ACTIVE_NAMING_STORE, environment);
}
/**
* Create a context with a prefix name.
*
* @param prefix The prefix for this context
* @param environment The naming environment
* @throws NamingException if an error occurs
*/
public NamingContext(final Name prefix, final Hashtable<String, Object> environment) throws NamingException {
this(prefix, ACTIVE_NAMING_STORE, environment);
}
/**
* Create a new naming context with a prefix name and a NamingStore instance to use as a backing.
*
* @param prefix The prefix for this context
* @param namingStore The NamingStore
* @param environment The naming environment
*/
public NamingContext(final Name prefix, final NamingStore namingStore, final Hashtable<String, Object> environment) {
if(prefix == null) {
throw MESSAGES.nullVar("Naming prefix");
}
this.prefix = prefix;
if(namingStore == null) {
throw MESSAGES.nullVar("NamingStore");
}
this.namingStore = namingStore;
if(environment != null) {
this.environment = new Hashtable<String, Object>(environment);
} else {
this.environment = new Hashtable<String, Object>();
}
}
/**
* Create a new naming context with the given namingStore and an empty name.
*
* @param namingStore the naming store to use
* @param environment the environment to use
*/
public NamingContext(final NamingStore namingStore, final Hashtable<String, Object> environment) {
this(new CompositeName(), namingStore, environment);
}
/** {@inheritDoc} */
public Object lookup(final Name name) throws NamingException {
if (isEmpty(name)) {
return new NamingContext(prefix, namingStore, environment);
}
final Name absoluteName = getAbsoluteName(name);
Object result;
try {
result = namingStore.lookup(absoluteName);
} catch(CannotProceedException cpe) {
final Context continuationContext = NamingManager.getContinuationContext(cpe);
result = continuationContext.lookup(cpe.getRemainingName());
}
if (result instanceof ResolveResult) {
final ResolveResult resolveResult = (ResolveResult) result;
final Object resolvedObject = resolveResult.getResolvedObj();
Object context;
if (resolvedObject instanceof Context){
context = resolvedObject;
} else if (resolvedObject instanceof LinkRef) {
context = resolveLink(resolvedObject);
} else {
context = getObjectInstance(resolvedObject, absoluteName, environment);
}
if (!(context instanceof Context)) {
throw notAContextException(absoluteName.getPrefix(absoluteName.size() - resolveResult.getRemainingName().size()));
}
final Context namingContext = (Context) context;
return namingContext.lookup(resolveResult.getRemainingName());
} else if (result instanceof LinkRef) {
result = resolveLink(result);
} else if (result instanceof Reference) {
result = getObjectInstance(result, absoluteName, environment);
if (result instanceof LinkRef) {
result = resolveLink(result);
}
}
return result;
}
/** {@inheritDoc} */
public Object lookup(final String name) throws NamingException {
return lookup(parseName(name));
}
/** {@inheritDoc} */
public void bind(final Name name, Object object) throws NamingException {
if(namingStore instanceof WritableNamingStore) {
final Name absoluteName = getAbsoluteName(name);
getWritableNamingStore().bind(absoluteName, object);
} else {
throw MESSAGES.readOnlyNamingContext();
}
}
/** {@inheritDoc} */
public void bind(final String name, final Object obj) throws NamingException {
bind(parseName(name), obj);
}
/** {@inheritDoc} */
public void rebind(final Name name, Object object) throws NamingException {
if(namingStore instanceof WritableNamingStore) {
final Name absoluteName = getAbsoluteName(name);
getWritableNamingStore().rebind(absoluteName, object);
} else {
throw MESSAGES.readOnlyNamingContext();
}
}
/** {@inheritDoc} */
public void rebind(final String name, final Object object) throws NamingException {
rebind(parseName(name), object);
}
/** {@inheritDoc} */
public void unbind(final Name name) throws NamingException {
if(namingStore instanceof WritableNamingStore) {
final Name absoluteName = getAbsoluteName(name);
getWritableNamingStore().unbind(absoluteName);
} else {
throw MESSAGES.readOnlyNamingContext();
}
}
/** {@inheritDoc} */
public void unbind(final String name) throws NamingException {
unbind(parseName(name));
}
/** {@inheritDoc} */
public void rename(final Name oldName, final Name newName) throws NamingException {
if (namingStore instanceof WritableNamingStore) {
bind(newName, lookup(oldName));
unbind(oldName);
} else {
throw MESSAGES.readOnlyNamingContext();
}
}
/** {@inheritDoc} */
public void rename(final String oldName, final String newName) throws NamingException {
rename(parseName(oldName), parseName(newName));
}
/** {@inheritDoc} */
public NamingEnumeration<NameClassPair> list(final Name name) throws NamingException {
try {
return namingEnumeration(namingStore.list(getAbsoluteName(name)));
} catch(CannotProceedException cpe) {
final Context continuationContext = NamingManager.getContinuationContext(cpe);
return continuationContext.list(cpe.getRemainingName());
} catch (RequireResolveException r) {
final Object o = lookup(r.getResolve());
if (o instanceof Context) {
return ((Context)o).list(name.getSuffix(r.getResolve().size()));
}
throw notAContextException(r.getResolve());
}
}
/** {@inheritDoc} */
public NamingEnumeration<NameClassPair> list(final String name) throws NamingException {
return list(parseName(name));
}
/** {@inheritDoc} */
public NamingEnumeration<Binding> listBindings(final Name name) throws NamingException {
try {
return namingEnumeration(namingStore.listBindings(getAbsoluteName(name)));
} catch(CannotProceedException cpe) {
final Context continuationContext = NamingManager.getContinuationContext(cpe);
return continuationContext.listBindings(cpe.getRemainingName());
} catch (RequireResolveException r) {
final Object o = lookup(r.getResolve());
if (o instanceof Context) {
return ((Context)o).listBindings(name.getSuffix(r.getResolve().size()));
}
throw notAContextException(r.getResolve());
}
}
/** {@inheritDoc} */
public NamingEnumeration<Binding> listBindings(final String name) throws NamingException {
return listBindings(parseName(name));
}
/** {@inheritDoc} */
public void destroySubcontext(final Name name) throws NamingException {
if(!(namingStore instanceof WritableNamingStore)) {
throw MESSAGES.readOnlyNamingContext();
}
}
/** {@inheritDoc} */
public void destroySubcontext(String name) throws NamingException {
destroySubcontext(parseName(name));
}
/** {@inheritDoc} */
public Context createSubcontext(Name name) throws NamingException {
if(namingStore instanceof WritableNamingStore) {
final Name absoluteName = getAbsoluteName(name);
return getWritableNamingStore().createSubcontext(absoluteName);
} else {
throw MESSAGES.readOnlyNamingContext();
}
}
/** {@inheritDoc} */
public Context createSubcontext(String name) throws NamingException {
return createSubcontext(parseName(name));
}
/** {@inheritDoc} */
public Object lookupLink(Name name) throws NamingException {
if (name.isEmpty()) {
return lookup(name);
}
try {
final Name absoluteName = getAbsoluteName(name);
Object link = namingStore.lookup(absoluteName);
if (!(link instanceof LinkRef) && link instanceof Reference) {
link = getObjectInstance(link, name, null);
}
return link;
} catch (Exception e) {
throw namingException(MESSAGES.cannotLookupLink(), e, name);
}
}
/** {@inheritDoc} */
public Object lookupLink(String name) throws NamingException {
return lookup(parseName(name));
}
/** {@inheritDoc} */
public NameParser getNameParser(Name name) throws NamingException {
return NameParser.INSTANCE;
}
/** {@inheritDoc} */
public NameParser getNameParser(String name) throws NamingException {
return NameParser.INSTANCE;
}
/** {@inheritDoc} */
public Name composeName(Name name, Name prefix) throws NamingException {
final Name result = (Name) prefix.clone();
result.addAll(name);
return result;
}
/** {@inheritDoc} */
public String composeName(String name, String prefix) throws NamingException {
return composeName(parseName(name), parseName(prefix)).toString();
}
/** {@inheritDoc} */
public Object addToEnvironment(String propName, Object propVal) throws NamingException {
final Object existing = environment.get(propName);
environment.put(propName, propVal);
return existing;
}
/** {@inheritDoc} */
public Object removeFromEnvironment(String propName) throws NamingException {
return environment.remove(propName);
}
/** {@inheritDoc} */
public Hashtable<?, ?> getEnvironment() throws NamingException {
return environment;
}
/** {@inheritDoc} */
public void close() throws NamingException {
// NO-OP
}
/** {@inheritDoc} */
public String getNameInNamespace() throws NamingException {
return prefix.toString();
}
/** {@inheritDoc} */
public void addNamingListener(final Name target, final int scope, final NamingListener listener) throws NamingException {
namingStore.addNamingListener(target, scope, listener);
}
/** {@inheritDoc} */
public void addNamingListener(final String target, final int scope, final NamingListener listener) throws NamingException {
addNamingListener(parseName(target), scope, listener);
}
/** {@inheritDoc} */
public void removeNamingListener(final NamingListener listener) throws NamingException {
namingStore.removeNamingListener(listener);
}
/** {@inheritDoc} */
public boolean targetMustExist() throws NamingException {
return false;
}
private Name parseName(final String name) throws NamingException {
return getNameParser(name).parse(name);
}
private Name getAbsoluteName(final Name name) throws NamingException {
if(name.isEmpty()) {
return composeName(name, prefix);
}
final String firstComponent = name.get(0);
if(firstComponent.startsWith("java:")) {
final String cleaned = firstComponent.substring(5);
final Name suffix = name.getSuffix(1);
if(cleaned.isEmpty()) {
return suffix;
}
return suffix.add(0, cleaned);
} else if(firstComponent.isEmpty()) {
return name.getSuffix(1);
} else {
return composeName(name, prefix);
}
}
private Object getObjectInstance(final Object object, final Name name, final Hashtable<?, ?> environment) throws NamingException {
try {
final ObjectFactoryBuilder factoryBuilder = ObjectFactoryBuilder.INSTANCE;
final ObjectFactory objectFactory = factoryBuilder.createObjectFactory(object, environment);
return objectFactory.getObjectInstance(object, name, this, environment);
} catch(NamingException e) {
throw e;
} catch(Throwable t) {
throw MESSAGES.cannotDeferenceObject(t);
}
}
private Object resolveLink(Object result) throws NamingException {
final Object linkResult;
try {
final LinkRef linkRef = (LinkRef) result;
final String referenceName = linkRef.getLinkName();
if (referenceName.startsWith("./")) {
linkResult = lookup(referenceName.substring(2));
} else {
linkResult = new InitialContext().lookup(referenceName);
}
} catch (Throwable t) {
throw MESSAGES.cannotDeferenceObject(t);
}
return linkResult;
}
Name getPrefix() {
return prefix;
}
NamingStore getNamingStore() {
return namingStore;
}
WritableNamingStore getWritableNamingStore() {
return WritableNamingStore.class.cast(getNamingStore());
}
}