Tomcat example source code file (ProxyDirContext.java)
The Tomcat ProxyDirContext.java source code/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.naming.resources;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.NameNotFoundException;
import javax.naming.NameParser;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;
import javax.naming.directory.ModificationItem;
import javax.naming.directory.SearchControls;
import org.apache.naming.StringManager;
/**
* Proxy Directory Context implementation.
*
* @author Remy Maucherat
* @version $Revision: 467222 $ $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $
*/
public class ProxyDirContext implements DirContext {
// -------------------------------------------------------------- Constants
public static final String CONTEXT = "context";
public static final String HOST = "host";
// ----------------------------------------------------------- Constructors
/**
* Builds a proxy directory context using the given environment.
*/
public ProxyDirContext(Hashtable env, DirContext dirContext) {
this.env = env;
this.dirContext = dirContext;
if (dirContext instanceof BaseDirContext) {
// Initialize parameters based on the associated dir context, like
// the caching policy.
BaseDirContext baseDirContext = (BaseDirContext) dirContext;
if (baseDirContext.isCached()) {
try {
cache = (ResourceCache)
Class.forName(cacheClassName).newInstance();
} catch (Exception e) {
//FIXME
e.printStackTrace();
}
cache.setCacheMaxSize(baseDirContext.getCacheMaxSize());
cacheTTL = baseDirContext.getCacheTTL();
cacheObjectMaxSize = baseDirContext.getCacheMaxSize() / 20;
}
}
hostName = (String) env.get(HOST);
contextName = (String) env.get(CONTEXT);
}
/**
* Builds a clone of this proxy dir context, wrapping the given directory
* context, and sharing the same cache.
*/
// TODO: Refactor using the proxy field
/*
protected ProxyDirContext(ProxyDirContext proxyDirContext,
DirContext dirContext, String vPath) {
this.env = proxyDirContext.env;
this.dirContext = dirContext;
this.vPath = vPath;
this.cache = proxyDirContext.cache;
this.cacheMaxSize = proxyDirContext.cacheMaxSize;
this.cacheSize = proxyDirContext.cacheSize;
this.cacheTTL = proxyDirContext.cacheTTL;
this.cacheObjectMaxSize = proxyDirContext.cacheObjectMaxSize;
this.notFoundCache = proxyDirContext.notFoundCache;
this.hostName = proxyDirContext.hostName;
this.contextName = proxyDirContext.contextName;
}
*/
// ----------------------------------------------------- Instance Variables
/**
* Proxy DirContext (either this or the real proxy).
*/
protected ProxyDirContext proxy = this;
/**
* Environment.
*/
protected Hashtable env;
/**
* The string manager for this package.
*/
protected StringManager sm = StringManager.getManager(Constants.Package);
/**
* Associated DirContext.
*/
protected DirContext dirContext;
/**
* Virtual path.
*/
protected String vPath = null;
/**
* Host name.
*/
protected String hostName;
/**
* Context name.
*/
protected String contextName;
/**
* Cache class.
*/
protected String cacheClassName =
"org.apache.naming.resources.ResourceCache";
/**
* Cache.
*/
protected ResourceCache cache = null;
/**
* Cache TTL.
*/
protected int cacheTTL = 5000; // 5s
/**
* Max size of resources which will have their content cached.
*/
protected int cacheObjectMaxSize = 512; // 512 KB
/**
* Immutable name not found exception.
*/
protected NameNotFoundException notFoundException =
new ImmutableNameNotFoundException();
/**
* Non cacheable resources.
*/
protected String[] nonCacheable = { "/WEB-INF/lib/", "/WEB-INF/classes/" };
// --------------------------------------------------------- Public Methods
/**
* Get the cache used for this context.
*/
public ResourceCache getCache() {
return cache;
}
/**
* Return the actual directory context we are wrapping.
*/
public DirContext getDirContext() {
return this.dirContext;
}
/**
* Return the document root for this component.
*/
public String getDocBase() {
if (dirContext instanceof BaseDirContext)
return ((BaseDirContext) dirContext).getDocBase();
else
return "";
}
/**
* Return the host name.
*/
public String getHostName() {
return this.hostName;
}
/**
* Return the context name.
*/
public String getContextName() {
return this.contextName;
}
// -------------------------------------------------------- Context Methods
/**
* Retrieves the named object. If name is empty, returns a new instance
* of this context (which represents the same naming context as this
* context, but its environment may be modified independently and it may
* be accessed concurrently).
*
* @param name the name of the object to look up
* @return the object bound to name
* @exception NamingException if a naming exception is encountered
*/
public Object lookup(Name name)
throws NamingException {
CacheEntry entry = cacheLookup(name.toString());
if (entry != null) {
if (!entry.exists) {
throw notFoundException;
}
if (entry.resource != null) {
// Check content caching.
return entry.resource;
} else {
return entry.context;
}
}
Object object = dirContext.lookup(parseName(name));
if (object instanceof InputStream)
return new Resource((InputStream) object);
else
return object;
}
/**
* Retrieves the named object.
*
* @param name the name of the object to look up
* @return the object bound to name
* @exception NamingException if a naming exception is encountered
*/
public Object lookup(String name)
throws NamingException {
CacheEntry entry = cacheLookup(name);
if (entry != null) {
if (!entry.exists) {
throw notFoundException;
}
if (entry.resource != null) {
return entry.resource;
} else {
return entry.context;
}
}
Object object = dirContext.lookup(parseName(name));
if (object instanceof InputStream) {
return new Resource((InputStream) object);
} else if (object instanceof DirContext) {
return object;
} else if (object instanceof Resource) {
return object;
} else {
return new Resource(new ByteArrayInputStream
(object.toString().getBytes()));
}
}
/**
* Binds a name to an object. All intermediate contexts and the target
* context (that named by all but terminal atomic component of the name)
* must already exist.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @exception NameAlreadyBoundException if name is already bound
* @exception InvalidAttributesException if object did not supply all
* mandatory attributes
* @exception NamingException if a naming exception is encountered
*/
public void bind(Name name, Object obj)
throws NamingException {
dirContext.bind(parseName(name), obj);
cacheUnload(name.toString());
}
/**
* Binds a name to an object.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @exception NameAlreadyBoundException if name is already bound
* @exception InvalidAttributesException if object did not supply all
* mandatory attributes
* @exception NamingException if a naming exception is encountered
*/
public void bind(String name, Object obj)
throws NamingException {
dirContext.bind(parseName(name), obj);
cacheUnload(name);
}
/**
* Binds a name to an object, overwriting any existing binding. All
* intermediate contexts and the target context (that named by all but
* terminal atomic component of the name) must already exist.
* <p>
* If the object is a DirContext, any existing attributes associated with
* the name are replaced with those of the object. Otherwise, any
* existing attributes associated with the name remain unchanged.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @exception InvalidAttributesException if object did not supply all
* mandatory attributes
* @exception NamingException if a naming exception is encountered
*/
public void rebind(Name name, Object obj)
throws NamingException {
dirContext.rebind(parseName(name), obj);
cacheUnload(name.toString());
}
/**
* Binds a name to an object, overwriting any existing binding.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @exception InvalidAttributesException if object did not supply all
* mandatory attributes
* @exception NamingException if a naming exception is encountered
*/
public void rebind(String name, Object obj)
throws NamingException {
dirContext.rebind(parseName(name), obj);
cacheUnload(name);
}
/**
* Unbinds the named object. Removes the terminal atomic name in name
* from the target context--that named by all but the terminal atomic
* part of name.
* <p>
* This method is idempotent. It succeeds even if the terminal atomic
* name is not bound in the target context, but throws
* NameNotFoundException if any of the intermediate contexts do not exist.
*
* @param name the name to bind; may not be empty
* @exception NameNotFoundException if an intermediate context does not
* exist
* @exception NamingException if a naming exception is encountered
*/
public void unbind(Name name)
throws NamingException {
dirContext.unbind(parseName(name));
cacheUnload(name.toString());
}
/**
* Unbinds the named object.
*
* @param name the name to bind; may not be empty
* @exception NameNotFoundException if an intermediate context does not
* exist
* @exception NamingException if a naming exception is encountered
*/
public void unbind(String name)
throws NamingException {
dirContext.unbind(parseName(name));
cacheUnload(name);
}
/**
* Binds a new name to the object bound to an old name, and unbinds the
* old name. Both names are relative to this context. Any attributes
* associated with the old name become associated with the new name.
* Intermediate contexts of the old name are not changed.
*
* @param oldName the name of the existing binding; may not be empty
* @param newName the name of the new binding; may not be empty
* @exception NameAlreadyBoundException if newName is already bound
* @exception NamingException if a naming exception is encountered
*/
public void rename(Name oldName, Name newName)
throws NamingException {
dirContext.rename(parseName(oldName), parseName(newName));
cacheUnload(oldName.toString());
}
/**
* Binds a new name to the object bound to an old name, and unbinds the
* old name.
*
* @param oldName the name of the existing binding; may not be empty
* @param newName the name of the new binding; may not be empty
* @exception NameAlreadyBoundException if newName is already bound
* @exception NamingException if a naming exception is encountered
*/
public void rename(String oldName, String newName)
throws NamingException {
dirContext.rename(parseName(oldName), parseName(newName));
cacheUnload(oldName);
}
/**
* Enumerates the names bound in the named context, along with the class
* names of objects bound to them. The contents of any subcontexts are
* not included.
* <p>
* If a binding is added to or removed from this context, its effect on
* an enumeration previously returned is undefined.
*
* @param name the name of the context to list
* @return an enumeration of the names and class names of the bindings in
* this context. Each element of the enumeration is of type NameClassPair.
* @exception NamingException if a naming exception is encountered
*/
public NamingEnumeration list(Name name)
throws NamingException {
return dirContext.list(parseName(name));
}
/**
* Enumerates the names bound in the named context, along with the class
* names of objects bound to them.
*
* @param name the name of the context to list
* @return an enumeration of the names and class names of the bindings in
* this context. Each element of the enumeration is of type NameClassPair.
* @exception NamingException if a naming exception is encountered
*/
public NamingEnumeration list(String name)
throws NamingException {
return dirContext.list(parseName(name));
}
/**
* Enumerates the names bound in the named context, along with the
* objects bound to them. The contents of any subcontexts are not
* included.
* <p>
* If a binding is added to or removed from this context, its effect on
* an enumeration previously returned is undefined.
*
* @param name the name of the context to list
* @return an enumeration of the bindings in this context.
* Each element of the enumeration is of type Binding.
* @exception NamingException if a naming exception is encountered
*/
public NamingEnumeration listBindings(Name name)
throws NamingException {
return dirContext.listBindings(parseName(name));
}
/**
* Enumerates the names bound in the named context, along with the
* objects bound to them.
*
* @param name the name of the context to list
* @return an enumeration of the bindings in this context.
* Each element of the enumeration is of type Binding.
* @exception NamingException if a naming exception is encountered
*/
public NamingEnumeration listBindings(String name)
throws NamingException {
return dirContext.listBindings(parseName(name));
}
/**
* Destroys the named context and removes it from the namespace. Any
* attributes associated with the name are also removed. Intermediate
* contexts are not destroyed.
* <p>
* This method is idempotent. It succeeds even if the terminal atomic
* name is not bound in the target context, but throws
* NameNotFoundException if any of the intermediate contexts do not exist.
*
* In a federated naming system, a context from one naming system may be
* bound to a name in another. One can subsequently look up and perform
* operations on the foreign context using a composite name. However, an
* attempt destroy the context using this composite name will fail with
* NotContextException, because the foreign context is not a "subcontext"
* of the context in which it is bound. Instead, use unbind() to remove
* the binding of the foreign context. Destroying the foreign context
* requires that the destroySubcontext() be performed on a context from
* the foreign context's "native" naming system.
*
* @param name the name of the context to be destroyed; may not be empty
* @exception NameNotFoundException if an intermediate context does not
* exist
* @exception NotContextException if the name is bound but does not name
* a context, or does not name a context of the appropriate type
*/
public void destroySubcontext(Name name)
throws NamingException {
dirContext.destroySubcontext(parseName(name));
cacheUnload(name.toString());
}
/**
* Destroys the named context and removes it from the namespace.
*
* @param name the name of the context to be destroyed; may not be empty
* @exception NameNotFoundException if an intermediate context does not
* exist
* @exception NotContextException if the name is bound but does not name
* a context, or does not name a context of the appropriate type
*/
public void destroySubcontext(String name)
throws NamingException {
dirContext.destroySubcontext(parseName(name));
cacheUnload(name);
}
/**
* Creates and binds a new context. Creates a new context with the given
* name and binds it in the target context (that named by all but
* terminal atomic component of the name). All intermediate contexts and
* the target context must already exist.
*
* @param name the name of the context to create; may not be empty
* @return the newly created context
* @exception NameAlreadyBoundException if name is already bound
* @exception InvalidAttributesException if creation of the subcontext
* requires specification of mandatory attributes
* @exception NamingException if a naming exception is encountered
*/
public Context createSubcontext(Name name)
throws NamingException {
Context context = dirContext.createSubcontext(parseName(name));
cacheUnload(name.toString());
return context;
}
/**
* Creates and binds a new context.
*
* @param name the name of the context to create; may not be empty
* @return the newly created context
* @exception NameAlreadyBoundException if name is already bound
* @exception InvalidAttributesException if creation of the subcontext
* requires specification of mandatory attributes
* @exception NamingException if a naming exception is encountered
*/
public Context createSubcontext(String name)
throws NamingException {
Context context = dirContext.createSubcontext(parseName(name));
cacheUnload(name);
return context;
}
/**
* Retrieves the named object, following links except for the terminal
* atomic component of the name. If the object bound to name is not a
* link, returns the object itself.
*
* @param name the name of the object to look up
* @return the object bound to name, not following the terminal link
* (if any).
* @exception NamingException if a naming exception is encountered
*/
public Object lookupLink(Name name)
throws NamingException {
return dirContext.lookupLink(parseName(name));
}
/**
* Retrieves the named object, following links except for the terminal
* atomic component of the name.
*
* @param name the name of the object to look up
* @return the object bound to name, not following the terminal link
* (if any).
* @exception NamingException if a naming exception is encountered
*/
public Object lookupLink(String name)
throws NamingException {
return dirContext.lookupLink(parseName(name));
}
/**
* Retrieves the parser associated with the named context. In a
* federation of namespaces, different naming systems will parse names
* differently. This method allows an application to get a parser for
* parsing names into their atomic components using the naming convention
* of a particular naming system. Within any single naming system,
* NameParser objects returned by this method must be equal (using the
* equals() test).
*
* @param name the name of the context from which to get the parser
* @return a name parser that can parse compound names into their atomic
* components
* @exception NamingException if a naming exception is encountered
*/
public NameParser getNameParser(Name name)
throws NamingException {
return dirContext.getNameParser(parseName(name));
}
/**
* Retrieves the parser associated with the named context.
*
* @param name the name of the context from which to get the parser
* @return a name parser that can parse compound names into their atomic
* components
* @exception NamingException if a naming exception is encountered
*/
public NameParser getNameParser(String name)
throws NamingException {
return dirContext.getNameParser(parseName(name));
}
/**
* Composes the name of this context with a name relative to this context.
* <p>
* Given a name (name) relative to this context, and the name (prefix)
* of this context relative to one of its ancestors, this method returns
* the composition of the two names using the syntax appropriate for the
* naming system(s) involved. That is, if name names an object relative
* to this context, the result is the name of the same object, but
* relative to the ancestor context. None of the names may be null.
*
* @param name a name relative to this context
* @param prefix the name of this context relative to one of its ancestors
* @return the composition of prefix and name
* @exception NamingException if a naming exception is encountered
*/
public Name composeName(Name name, Name prefix)
throws NamingException {
prefix = (Name) prefix.clone();
return prefix.addAll(name);
}
/**
* Composes the name of this context with a name relative to this context.
*
* @param name a name relative to this context
* @param prefix the name of this context relative to one of its ancestors
* @return the composition of prefix and name
* @exception NamingException if a naming exception is encountered
*/
public String composeName(String name, String prefix)
throws NamingException {
return prefix + "/" + name;
}
/**
* Adds a new environment property to the environment of this context. If
* the property already exists, its value is overwritten.
*
* @param propName the name of the environment property to add; may not
* be null
* @param propVal the value of the property to add; may not be null
* @exception NamingException if a naming exception is encountered
*/
public Object addToEnvironment(String propName, Object propVal)
throws NamingException {
return dirContext.addToEnvironment(propName, propVal);
}
/**
* Removes an environment property from the environment of this context.
*
* @param propName the name of the environment property to remove;
* may not be null
* @exception NamingException if a naming exception is encountered
*/
public Object removeFromEnvironment(String propName)
throws NamingException {
return dirContext.removeFromEnvironment(propName);
}
/**
* Retrieves the environment in effect for this context. See class
* description for more details on environment properties.
* The caller should not make any changes to the object returned: their
* effect on the context is undefined. The environment of this context
* may be changed using addToEnvironment() and removeFromEnvironment().
*
* @return the environment of this context; never null
* @exception NamingException if a naming exception is encountered
*/
public Hashtable getEnvironment()
throws NamingException {
return dirContext.getEnvironment();
}
/**
* Closes this context. This method releases this context's resources
* immediately, instead of waiting for them to be released automatically
* by the garbage collector.
* This method is idempotent: invoking it on a context that has already
* been closed has no effect. Invoking any other method on a closed
* context is not allowed, and results in undefined behaviour.
*
* @exception NamingException if a naming exception is encountered
*/
public void close()
throws NamingException {
dirContext.close();
}
/**
* Retrieves the full name of this context within its own namespace.
* <p>
* Many naming services have a notion of a "full name" for objects in
* their respective namespaces. For example, an LDAP entry has a
* distinguished name, and a DNS record has a fully qualified name. This
* method allows the client application to retrieve this name. The string
* returned by this method is not a JNDI composite name and should not be
* passed directly to context methods. In naming systems for which the
* notion of full name does not make sense,
* OperationNotSupportedException is thrown.
*
* @return this context's name in its own namespace; never null
* @exception OperationNotSupportedException if the naming system does
* not have the notion of a full name
* @exception NamingException if a naming exception is encountered
*/
public String getNameInNamespace()
throws NamingException {
return dirContext.getNameInNamespace();
}
// ----------------------------------------------------- DirContext Methods
/**
* Retrieves all of the attributes associated with a named object.
*
* @return the set of attributes associated with name.
* Returns an empty attribute set if name has no attributes; never null.
* @param name the name of the object from which to retrieve attributes
* @exception NamingException if a naming exception is encountered
*/
public Attributes getAttributes(Name name)
throws NamingException {
CacheEntry entry = cacheLookup(name.toString());
if (entry != null) {
if (!entry.exists) {
throw notFoundException;
}
return entry.attributes;
}
Attributes attributes = dirContext.getAttributes(parseName(name));
if (!(attributes instanceof ResourceAttributes)) {
attributes = new ResourceAttributes(attributes);
}
return attributes;
}
/**
* Retrieves all of the attributes associated with a named object.
*
* @return the set of attributes associated with name
* @param name the name of the object from which to retrieve attributes
* @exception NamingException if a naming exception is encountered
*/
public Attributes getAttributes(String name)
throws NamingException {
CacheEntry entry = cacheLookup(name);
if (entry != null) {
if (!entry.exists) {
throw notFoundException;
}
return entry.attributes;
}
Attributes attributes = dirContext.getAttributes(parseName(name));
if (!(attributes instanceof ResourceAttributes)) {
attributes = new ResourceAttributes(attributes);
}
return attributes;
}
/**
* Retrieves selected attributes associated with a named object.
* See the class description regarding attribute models, attribute type
* names, and operational attributes.
*
* @return the requested attributes; never null
* @param name the name of the object from which to retrieve attributes
* @param attrIds the identifiers of the attributes to retrieve. null
* indicates that all attributes should be retrieved; an empty array
* indicates that none should be retrieved
* @exception NamingException if a naming exception is encountered
*/
public Attributes getAttributes(Name name, String[] attrIds)
throws NamingException {
Attributes attributes =
dirContext.getAttributes(parseName(name), attrIds);
if (!(attributes instanceof ResourceAttributes)) {
attributes = new ResourceAttributes(attributes);
}
return attributes;
}
/**
* Retrieves selected attributes associated with a named object.
*
* @return the requested attributes; never null
* @param name the name of the object from which to retrieve attributes
* @param attrIds the identifiers of the attributes to retrieve. null
* indicates that all attributes should be retrieved; an empty array
* indicates that none should be retrieved
* @exception NamingException if a naming exception is encountered
*/
public Attributes getAttributes(String name, String[] attrIds)
throws NamingException {
Attributes attributes =
dirContext.getAttributes(parseName(name), attrIds);
if (!(attributes instanceof ResourceAttributes)) {
attributes = new ResourceAttributes(attributes);
}
return attributes;
}
/**
* Modifies the attributes associated with a named object. The order of
* the modifications is not specified. Where possible, the modifications
* are performed atomically.
*
* @param name the name of the object whose attributes will be updated
* @param mod_op the modification operation, one of: ADD_ATTRIBUTE,
* REPLACE_ATTRIBUTE, REMOVE_ATTRIBUTE
* @param attrs the attributes to be used for the modification; may not
* be null
* @exception AttributeModificationException if the modification cannot be
* completed successfully
* @exception NamingException if a naming exception is encountered
*/
public void modifyAttributes(Name name, int mod_op, Attributes attrs)
throws NamingException {
dirContext.modifyAttributes(parseName(name), mod_op, attrs);
cacheUnload(name.toString());
}
/**
* Modifies the attributes associated with a named object.
*
* @param name the name of the object whose attributes will be updated
* @param mod_op the modification operation, one of: ADD_ATTRIBUTE,
* REPLACE_ATTRIBUTE, REMOVE_ATTRIBUTE
* @param attrs the attributes to be used for the modification; may not
* be null
* @exception AttributeModificationException if the modification cannot be
* completed successfully
* @exception NamingException if a naming exception is encountered
*/
public void modifyAttributes(String name, int mod_op, Attributes attrs)
throws NamingException {
dirContext.modifyAttributes(parseName(name), mod_op, attrs);
cacheUnload(name);
}
/**
* Modifies the attributes associated with a named object using an an
* ordered list of modifications. The modifications are performed in the
* order specified. Each modification specifies a modification operation
* code and an attribute on which to operate. Where possible, the
* modifications are performed atomically.
*
* @param name the name of the object whose attributes will be updated
* @param mods an ordered sequence of modifications to be performed; may
* not be null
* @exception AttributeModificationException if the modification cannot be
* completed successfully
* @exception NamingException if a naming exception is encountered
*/
public void modifyAttributes(Name name, ModificationItem[] mods)
throws NamingException {
dirContext.modifyAttributes(parseName(name), mods);
cacheUnload(name.toString());
}
/**
* Modifies the attributes associated with a named object using an an
* ordered list of modifications.
*
* @param name the name of the object whose attributes will be updated
* @param mods an ordered sequence of modifications to be performed; may
* not be null
* @exception AttributeModificationException if the modification cannot be
* completed successfully
* @exception NamingException if a naming exception is encountered
*/
public void modifyAttributes(String name, ModificationItem[] mods)
throws NamingException {
dirContext.modifyAttributes(parseName(name), mods);
cacheUnload(name);
}
/**
* Binds a name to an object, along with associated attributes. If attrs
* is null, the resulting binding will have the attributes associated
* with obj if obj is a DirContext, and no attributes otherwise. If attrs
* is non-null, the resulting binding will have attrs as its attributes;
* any attributes associated with obj are ignored.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @param attrs the attributes to associate with the binding
* @exception NameAlreadyBoundException if name is already bound
* @exception InvalidAttributesException if some "mandatory" attributes
* of the binding are not supplied
* @exception NamingException if a naming exception is encountered
*/
public void bind(Name name, Object obj, Attributes attrs)
throws NamingException {
dirContext.bind(parseName(name), obj, attrs);
cacheUnload(name.toString());
}
/**
* Binds a name to an object, along with associated attributes.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @param attrs the attributes to associate with the binding
* @exception NameAlreadyBoundException if name is already bound
* @exception InvalidAttributesException if some "mandatory" attributes
* of the binding are not supplied
* @exception NamingException if a naming exception is encountered
*/
public void bind(String name, Object obj, Attributes attrs)
throws NamingException {
dirContext.bind(parseName(name), obj, attrs);
cacheUnload(name);
}
/**
* Binds a name to an object, along with associated attributes,
* overwriting any existing binding. If attrs is null and obj is a
* DirContext, the attributes from obj are used. If attrs is null and obj
* is not a DirContext, any existing attributes associated with the object
* already bound in the directory remain unchanged. If attrs is non-null,
* any existing attributes associated with the object already bound in
* the directory are removed and attrs is associated with the named
* object. If obj is a DirContext and attrs is non-null, the attributes
* of obj are ignored.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @param attrs the attributes to associate with the binding
* @exception InvalidAttributesException if some "mandatory" attributes
* of the binding are not supplied
* @exception NamingException if a naming exception is encountered
*/
public void rebind(Name name, Object obj, Attributes attrs)
throws NamingException {
dirContext.rebind(parseName(name), obj, attrs);
cacheUnload(name.toString());
}
/**
* Binds a name to an object, along with associated attributes,
* overwriting any existing binding.
*
* @param name the name to bind; may not be empty
* @param obj the object to bind; possibly null
* @param attrs the attributes to associate with the binding
* @exception InvalidAttributesException if some "mandatory" attributes
* of the binding are not supplied
* @exception NamingException if a naming exception is encountered
*/
public void rebind(String name, Object obj, Attributes attrs)
throws NamingException {
dirContext.rebind(parseName(name), obj, attrs);
cacheUnload(name);
}
/**
* Creates and binds a new context, along with associated attributes.
* This method creates a new subcontext with the given name, binds it in
* the target context (that named by all but terminal atomic component of
* the name), and associates the supplied attributes with the newly
* created object. All intermediate and target contexts must already
* exist. If attrs is null, this method is equivalent to
* Context.createSubcontext().
*
* @param name the name of the context to create; may not be empty
* @param attrs the attributes to associate with the newly created context
* @return the newly created context
* @exception NameAlreadyBoundException if the name is already bound
* @exception InvalidAttributesException if attrs does not contain all
* the mandatory attributes required for creation
* @exception NamingException if a naming exception is encountered
*/
public DirContext createSubcontext(Name name, Attributes attrs)
throws NamingException {
DirContext context =
dirContext.createSubcontext(parseName(name), attrs);
cacheUnload(name.toString());
return context;
}
/**
* Creates and binds a new context, along with associated attributes.
*
* @param name the name of the context to create; may not be empty
* @param attrs the attributes to associate with the newly created context
* @return the newly created context
* @exception NameAlreadyBoundException if the name is already bound
* @exception InvalidAttributesException if attrs does not contain all
* the mandatory attributes required for creation
* @exception NamingException if a naming exception is encountered
*/
public DirContext createSubcontext(String name, Attributes attrs)
throws NamingException {
DirContext context =
dirContext.createSubcontext(parseName(name), attrs);
cacheUnload(name);
return context;
}
/**
* Retrieves the schema associated with the named object. The schema
* describes rules regarding the structure of the namespace and the
* attributes stored within it. The schema specifies what types of
* objects can be added to the directory and where they can be added;
* what mandatory and optional attributes an object can have. The range
* of support for schemas is directory-specific.
*
* @param name the name of the object whose schema is to be retrieved
* @return the schema associated with the context; never null
* @exception OperationNotSupportedException if schema not supported
* @exception NamingException if a naming exception is encountered
*/
public DirContext getSchema(Name name)
throws NamingException {
return dirContext.getSchema(parseName(name));
}
/**
* Retrieves the schema associated with the named object.
*
* @param name the name of the object whose schema is to be retrieved
* @return the schema associated with the context; never null
* @exception OperationNotSupportedException if schema not supported
* @exception NamingException if a naming exception is encountered
*/
public DirContext getSchema(String name)
throws NamingException {
return dirContext.getSchema(parseName(name));
}
/**
* Retrieves a context containing the schema objects of the named
* object's class definitions.
*
* @param name the name of the object whose object class definition is to
* be retrieved
* @return the DirContext containing the named object's class
* definitions; never null
* @exception OperationNotSupportedException if schema not supported
* @exception NamingException if a naming exception is encountered
*/
public DirContext getSchemaClassDefinition(Name name)
throws NamingException {
return dirContext.getSchemaClassDefinition(parseName(name));
}
/**
* Retrieves a context containing the schema objects of the named
* object's class definitions.
*
* @param name the name of the object whose object class definition is to
* be retrieved
* @return the DirContext containing the named object's class
* definitions; never null
* @exception OperationNotSupportedException if schema not supported
* @exception NamingException if a naming exception is encountered
*/
public DirContext getSchemaClassDefinition(String name)
throws NamingException {
return dirContext.getSchemaClassDefinition(parseName(name));
}
/**
* Searches in a single context for objects that contain a specified set
* of attributes, and retrieves selected attributes. The search is
* performed using the default SearchControls settings.
*
* @param name the name of the context to search
* @param matchingAttributes the attributes to search for. If empty or
* null, all objects in the target context are returned.
* @param attributesToReturn the attributes to return. null indicates
* that all attributes are to be returned; an empty array indicates that
* none are to be returned.
* @return a non-null enumeration of SearchResult objects. Each
* SearchResult contains the attributes identified by attributesToReturn
* and the name of the corresponding object, named relative to the
* context named by name.
* @exception NamingException if a naming exception is encountered
*/
public NamingEnumeration search(Name name, Attributes matchingAttributes,
String[] attributesToReturn)
throws NamingException {
return dirContext.search(parseName(name), matchingAttributes,
attributesToReturn);
}
/**
* Searches in a single context for objects that contain a specified set
* of attributes, and retrieves selected attributes.
*
* @param name the name of the context to search
* @param matchingAttributes the attributes to search for. If empty or
* null, all objects in the target context are returned.
* @param attributesToReturn the attributes to return. null indicates
* that all attributes are to be returned; an empty array indicates that
* none are to be returned.
* @return a non-null enumeration of SearchResult objects. Each
* SearchResult contains the attributes identified by attributesToReturn
* and the name of the corresponding object, named relative to the
* context named by name.
* @exception NamingException if a naming exception is encountered
*/
public NamingEnumeration search(String name, Attributes matchingAttributes,
String[] attributesToReturn)
throws NamingException {
return dirContext.search(parseName(name), matchingAttributes,
attributesToReturn);
}
/**
* Searches in a single context for objects that contain a specified set
* of attributes. This method returns all the attributes of such objects.
* It is equivalent to supplying null as the atributesToReturn parameter
* to the method search(Name, Attributes, String[]).
*
* @param name the name of the context to search
* @param matchingAttributes the attributes to search for. If empty or
* null, all objects in the target context are returned.
* @return a non-null enumeration of SearchResult objects. Each
* SearchResult contains the attributes identified by attributesToReturn
* and the name of the corresponding object, named relative to the
* context named by name.
* @exception NamingException if a naming exception is encountered
*/
public NamingEnumeration search(Name name, Attributes matchingAttributes)
throws NamingException {
return dirContext.search(parseName(name), matchingAttributes);
}
/**
* Searches in a single context for objects that contain a specified set
* of attributes.
*
* @param name the name of the context to search
* @param matchingAttributes the attributes to search for. If empty or
* null, all objects in the target context are returned.
* @return a non-null enumeration of SearchResult objects. Each
* SearchResult contains the attributes identified by attributesToReturn
* and the name of the corresponding object, named relative to the
* context named by name.
* @exception NamingException if a naming exception is encountered
*/
public NamingEnumeration search(String name, Attributes matchingAttributes)
throws NamingException {
return dirContext.search(parseName(name), matchingAttributes);
}
/**
* Searches in the named context or object for entries that satisfy the
* given search filter. Performs the search as specified by the search
* controls.
*
* @param name the name of the context or object to search
* @param filter the filter expression to use for the search; may not be
* null
* @param cons the search controls that control the search. If null,
* the default search controls are used (equivalent to
* (new SearchControls())).
* @return an enumeration of SearchResults of the objects that satisfy
* the filter; never null
* @exception InvalidSearchFilterException if the search filter specified
* is not supported or understood by the underlying directory
* @exception InvalidSearchControlsException if the search controls
* contain invalid settings
* @exception NamingException if a naming exception is encountered
*/
public NamingEnumeration search(Name name, String filter,
SearchControls cons)
throws NamingException {
return dirContext.search(parseName(name), filter, cons);
}
/**
* Searches in the named context or object for entries that satisfy the
* given search filter. Performs the search as specified by the search
* controls.
*
* @param name the name of the context or object to search
* @param filter the filter expression to use for the search; may not be
* null
* @param cons the search controls that control the search. If null,
* the default search controls are used (equivalent to
* (new SearchControls())).
* @return an enumeration of SearchResults of the objects that satisfy
* the filter; never null
* @exception InvalidSearchFilterException if the search filter
* specified is not supported or understood by the underlying directory
* @exception InvalidSearchControlsException if the search controls
* contain invalid settings
* @exception NamingException if a naming exception is encountered
*/
public NamingEnumeration search(String name, String filter,
SearchControls cons)
throws NamingException {
return dirContext.search(parseName(name), filter, cons);
}
/**
* Searches in the named context or object for entries that satisfy the
* given search filter. Performs the search as specified by the search
* controls.
*
* @param name the name of the context or object to search
* @param filterExpr the filter expression to use for the search.
* The expression may contain variables of the form "{i}" where i is a
* nonnegative integer. May not be null.
* @param filterArgs the array of arguments to substitute for the
* variables in filterExpr. The value of filterArgs[i] will replace each
* occurrence of "{i}". If null, equivalent to an empty array.
* @param cons the search controls that control the search. If null, the
* default search controls are used (equivalent to (new SearchControls())).
* @return an enumeration of SearchResults of the objects that satisy the
* filter; never null
* @exception ArrayIndexOutOfBoundsException if filterExpr contains {i}
* expressions where i is outside the bounds of the array filterArgs
* @exception InvalidSearchControlsException if cons contains invalid
* settings
* @exception InvalidSearchFilterException if filterExpr with filterArgs
* represents an invalid search filter
* @exception NamingException if a naming exception is encountered
*/
public NamingEnumeration search(Name name, String filterExpr,
Object[] filterArgs, SearchControls cons)
throws NamingException {
return dirContext.search(parseName(name), filterExpr, filterArgs,
cons);
}
/**
* Searches in the named context or object for entries that satisfy the
* given search filter. Performs the search as specified by the search
* controls.
*
* @param name the name of the context or object to search
* @param filterExpr the filter expression to use for the search.
* The expression may contain variables of the form "{i}" where i is a
* nonnegative integer. May not be null.
* @param filterArgs the array of arguments to substitute for the
* variables in filterExpr. The value of filterArgs[i] will replace each
* occurrence of "{i}". If null, equivalent to an empty array.
* @param cons the search controls that control the search. If null, the
* default search controls are used (equivalent to (new SearchControls())).
* @return an enumeration of SearchResults of the objects that satisy the
* filter; never null
* @exception ArrayIndexOutOfBoundsException if filterExpr contains {i}
* expressions where i is outside the bounds of the array filterArgs
* @exception InvalidSearchControlsException if cons contains invalid
* settings
* @exception InvalidSearchFilterException if filterExpr with filterArgs
* represents an invalid search filter
* @exception NamingException if a naming exception is encountered
*/
public NamingEnumeration search(String name, String filterExpr,
Object[] filterArgs, SearchControls cons)
throws NamingException {
return dirContext.search(parseName(name), filterExpr, filterArgs,
cons);
}
// --------------------------------------------------------- Public Methods
/**
* Retrieves the named object as a cache entry, without any exception.
*
* @param name the name of the object to look up
* @return the cache entry bound to name
*/
public CacheEntry lookupCache(String name) {
CacheEntry entry = cacheLookup(name);
if (entry == null) {
entry = new CacheEntry();
entry.name = name;
try {
Object object = dirContext.lookup(parseName(name));
if (object instanceof InputStream) {
entry.resource = new Resource((InputStream) object);
} else if (object instanceof DirContext) {
entry.context = (DirContext) object;
} else if (object instanceof Resource) {
entry.resource = (Resource) object;
} else {
entry.resource = new Resource(new ByteArrayInputStream
(object.toString().getBytes()));
}
Attributes attributes = dirContext.getAttributes(parseName(name));
if (!(attributes instanceof ResourceAttributes)) {
attributes = new ResourceAttributes(attributes);
}
entry.attributes = (ResourceAttributes) attributes;
} catch (NamingException e) {
entry.exists = false;
}
}
return entry;
}
// ------------------------------------------------------ Protected Methods
/**
* Parses a name.
*
* @return the parsed name
*/
protected String parseName(String name)
throws NamingException {
return name;
}
/**
* Parses a name.
*
* @return the parsed name
*/
protected Name parseName(Name name)
throws NamingException {
return name;
}
/**
* Lookup in cache.
*/
protected CacheEntry cacheLookup(String name) {
if (cache == null)
return (null);
if (name == null)
name = "";
for (int i = 0; i < nonCacheable.length; i++) {
if (name.startsWith(nonCacheable[i])) {
return (null);
}
}
CacheEntry cacheEntry = cache.lookup(name);
if (cacheEntry == null) {
cacheEntry = new CacheEntry();
cacheEntry.name = name;
// Load entry
cacheLoad(cacheEntry);
} else {
if (!validate(cacheEntry)) {
if (!revalidate(cacheEntry)) {
cacheUnload(cacheEntry.name);
return (null);
} else {
cacheEntry.timestamp =
System.currentTimeMillis() + cacheTTL;
}
}
cacheEntry.accessCount++;
}
return (cacheEntry);
}
/**
* Validate entry.
*/
protected boolean validate(CacheEntry entry) {
if (((!entry.exists)
|| (entry.context != null)
|| ((entry.resource != null)
&& (entry.resource.getContent() != null)))
&& (System.currentTimeMillis() < entry.timestamp)) {
return true;
}
return false;
}
/**
* Revalidate entry.
*/
protected boolean revalidate(CacheEntry entry) {
// Get the attributes at the given path, and check the last
// modification date
if (!entry.exists)
return false;
if (entry.attributes == null)
return false;
long lastModified = entry.attributes.getLastModified();
long contentLength = entry.attributes.getContentLength();
if (lastModified <= 0)
return false;
try {
Attributes tempAttributes = dirContext.getAttributes(entry.name);
ResourceAttributes attributes = null;
if (!(tempAttributes instanceof ResourceAttributes)) {
attributes = new ResourceAttributes(tempAttributes);
} else {
attributes = (ResourceAttributes) tempAttributes;
}
long lastModified2 = attributes.getLastModified();
long contentLength2 = attributes.getContentLength();
return (lastModified == lastModified2)
&& (contentLength == contentLength2);
} catch (NamingException e) {
return false;
}
}
/**
* Load entry into cache.
*/
protected void cacheLoad(CacheEntry entry) {
String name = entry.name;
// Retrieve missing info
boolean exists = true;
// Retrieving attributes
if (entry.attributes == null) {
try {
Attributes attributes = dirContext.getAttributes(entry.name);
if (!(attributes instanceof ResourceAttributes)) {
entry.attributes =
new ResourceAttributes(attributes);
} else {
entry.attributes = (ResourceAttributes) attributes;
}
} catch (NamingException e) {
exists = false;
}
}
// Retriving object
if ((exists) && (entry.resource == null) && (entry.context == null)) {
try {
Object object = dirContext.lookup(name);
if (object instanceof InputStream) {
entry.resource = new Resource((InputStream) object);
} else if (object instanceof DirContext) {
entry.context = (DirContext) object;
} else if (object instanceof Resource) {
entry.resource = (Resource) object;
} else {
entry.resource = new Resource(new ByteArrayInputStream
(object.toString().getBytes()));
}
} catch (NamingException e) {
exists = false;
}
}
// Load object content
if ((exists) && (entry.resource != null)
&& (entry.resource.getContent() == null)
&& (entry.attributes.getContentLength() >= 0)
&& (entry.attributes.getContentLength() <
(cacheObjectMaxSize * 1024))) {
int length = (int) entry.attributes.getContentLength();
// The entry size is 1 + the resource size in KB, if it will be
// cached
entry.size += (entry.attributes.getContentLength() / 1024);
InputStream is = null;
try {
is = entry.resource.streamContent();
int pos = 0;
byte[] b = new byte[length];
while (pos < length) {
int n = is.read(b, pos, length - pos);
if (n < 0)
break;
pos = pos + n;
}
entry.resource.setContent(b);
} catch (IOException e) {
; // Ignore
} finally {
try {
if (is != null)
is.close();
} catch (IOException e) {
; // Ignore
}
}
}
// Set existence flag
entry.exists = exists;
// Set timestamp
entry.timestamp = System.currentTimeMillis() + cacheTTL;
// Add new entry to cache
synchronized (cache) {
// Check cache size, and remove elements if too big
if ((cache.lookup(name) == null) && cache.allocate(entry.size)) {
cache.load(entry);
}
}
}
/**
* Remove entry from cache.
*/
protected boolean cacheUnload(String name) {
if (cache == null)
return false;
synchronized (cache) {
return cache.unload(name);
}
}
}
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