| /* |
| * Copyright 1999-2004 The Apache Software Foundation |
| * |
| * Licensed 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.modules.cache; |
| |
| import java.util.Collections; |
| import java.util.Hashtable; |
| import java.util.Map; |
| |
| import javax.naming.Context; |
| import javax.naming.Name; |
| 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.commons.collections.LRUMap; |
| import org.apache.naming.core.BaseDirContext; |
| import org.apache.naming.util.AttributeHelper; |
| import org.apache.tomcat.util.res.StringManager; |
| |
| /* Changes( costin ): The goal is to make it a generic JNDI cache, not specific |
| to file system. |
| |
| - no more wrapping in Resource and ResourceAttributes. |
| We just cache, and the caller can use tools to do the wrapping or operate on atts. |
| - we use only lastModified ( not contentLength ). |
| - |
| |
| TODO: |
| - add a special CacheInputStream - that will save the byte[] in the cache entry. |
| - 2 TTL: one will prevent accessing the dir ( even for lastModified ), one will |
| expire the entry regardless. The first should be very short ( .1 sec ? ), for |
| to avoid very frequent accesses to the same entry. |
| Alternative ( probably the best ): use a background thread to check 'lastModified', |
| like we do in 3.3 for class reloading. |
| */ |
| |
| |
| |
| /** |
| * Proxy Directory Context implementation. |
| * |
| * Will cache directory entries - attributes and content. This can be used |
| * to eliminate expensive dir access and to avoid keeping large directories in memory. |
| * |
| * @author Remy Maucherat |
| * @author Costin Manolache |
| */ |
| public class ProxyDirContext implements DirContext { |
| private static org.apache.commons.logging.Log log= |
| org.apache.commons.logging.LogFactory.getLog( ProxyDirContext.class ); |
| |
| |
| // ----------------------------------------------------------- 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. |
| if (((BaseDirContext) dirContext).isCached()) { |
| cache = Collections.synchronizedMap(new LRUMap(cacheSize)); |
| cacheTTL = ((BaseDirContext) dirContext).getCacheTTL(); |
| cacheObjectMaxSize = |
| ((BaseDirContext) dirContext).getCacheObjectMaxSize(); |
| } |
| } |
| } |
| |
| /** |
| * Builds a clone of this proxy dir context, wrapping the given directory |
| * context, and sharing the same cache. |
| */ |
| protected ProxyDirContext(ProxyDirContext proxyDirContext, |
| DirContext dirContext) { |
| this.env = proxyDirContext.env; |
| this.dirContext = dirContext; |
| this.cache = proxyDirContext.cache; |
| this.cacheSize = proxyDirContext.cacheSize; |
| this.cacheTTL = proxyDirContext.cacheTTL; |
| this.cacheObjectMaxSize = proxyDirContext.cacheObjectMaxSize; |
| } |
| |
| |
| // ----------------------------------------------------- Instance Variables |
| |
| |
| /** |
| * Environment. |
| */ |
| protected Hashtable env; |
| |
| |
| /** |
| * The string manager for this package. |
| */ |
| protected StringManager sm = StringManager.getManager("org.apache.naming.res"); |
| |
| |
| /** |
| * Associated DirContext. |
| */ |
| protected DirContext dirContext; |
| |
| |
| /** |
| * Cache. |
| * Path -> Cache entry. |
| */ |
| protected Map cache = null; |
| |
| |
| /** |
| * Cache size |
| */ |
| protected int cacheSize = 1000; |
| |
| |
| /** |
| * Cache TTL. |
| */ |
| protected int cacheTTL = 5000; // 5s |
| |
| |
| /** |
| * Max size of resources which will have their content cached. |
| */ |
| protected int cacheObjectMaxSize = 32768; // 32 KB |
| |
| |
| // --------------------------------------------------------- Public Methods |
| |
| |
| /** |
| * Return the actual directory context we are wrapping. |
| */ |
| public DirContext getDirContext() { |
| return this.dirContext; |
| } |
| |
| |
| // -------------------------------------------------------- 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 = cacheLookupAndLoad(name.toString()); |
| if (entry != null) { |
| if (entry.resource != null) { |
| // Check content caching. |
| |
| return entry.resource; |
| } else { |
| return entry.context; |
| } |
| } |
| log.info("Strange, entry was no loadeded " + name ); |
| 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 = cacheLookupAndLoad(name); |
| if (entry != null) { |
| if (entry.resource != null) { |
| return entry.resource; |
| } else { |
| return entry.context; |
| } |
| } |
| log.info("Strange, entry was no loadeded " + name ); |
| |
| 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())); |
| // } |
| return object; |
| } |
| |
| |
| /** |
| * 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 { |
| return dirContext.createSubcontext(parseName(name)); |
| } |
| |
| |
| /** |
| * 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 { |
| return dirContext.createSubcontext(parseName(name)); |
| } |
| |
| |
| /** |
| * 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) name.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 = cacheLookupAndLoad(name.toString()); |
| if (entry != null) { |
| return entry.attributes; |
| } |
| Attributes attributes = dirContext.getAttributes(parseName(name)); |
| |
| // TODO(costin): Why do we need to wrap it ? It may be better to use decorator |
| // 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 = cacheLookupAndLoad(name); |
| if (entry != null) { |
| 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); |
| } |
| |
| |
| /** |
| * 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); |
| } |
| |
| |
| /** |
| * 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); |
| } |
| |
| |
| /** |
| * 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); |
| } |
| |
| |
| /** |
| * 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); |
| } |
| |
| |
| /** |
| * 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); |
| } |
| |
| |
| /** |
| * 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); |
| } |
| |
| |
| /** |
| * 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); |
| } |
| |
| |
| /** |
| * 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 { |
| return dirContext.createSubcontext(parseName(name), attrs); |
| } |
| |
| |
| /** |
| * 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 { |
| return dirContext.createSubcontext(parseName(name), attrs); |
| } |
| |
| |
| /** |
| * 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); |
| } |
| |
| |
| // ------------------------------------------------------ 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 cacheLookupAndLoad(String name) { |
| if (cache == null) |
| return (null); |
| CacheEntry cacheEntry = (CacheEntry) cache.get(name); |
| if (cacheEntry == null) { |
| cacheEntry = new CacheEntry(); |
| cacheEntry.name = name; |
| // Load entry |
| if (!cacheLoad(cacheEntry)) |
| return null; |
| return (cacheEntry); |
| } else { |
| if (!validate(cacheEntry)) { |
| if (!revalidate(cacheEntry)) { |
| cacheUnload(cacheEntry.name); |
| return (null); |
| } else { |
| cacheEntry.timestamp = |
| System.currentTimeMillis() + cacheTTL; |
| } |
| } |
| return (cacheEntry); |
| } |
| } |
| |
| |
| /** |
| * Validate entry. |
| */ |
| protected boolean validate(CacheEntry entry) { |
| if ((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.attributes == null) |
| return false; |
| long lastModified = AttributeHelper.getLastModified(entry.attributes); |
| // long contentLength = entry.attributes.getContentLength(); |
| if (lastModified <= 0) |
| return false; |
| try { |
| // Attributes tempAttributes = dirContext.getAttributes(entry.name); |
| Attributes attributes = dirContext.getAttributes(entry.name); |
| // ResourceAttributes attributes = null; |
| // if (!(tempAttributes instanceof ResourceAttributes)) { |
| // attributes = new ResourceAttributes(tempAttributes); |
| // } else { |
| // attributes = (ResourceAttributes) tempAttributes; |
| // } |
| long lastModified2 = AttributeHelper.getLastModified(attributes); |
| // long contentLength2 = attributes.getContentLength(); |
| return (lastModified == lastModified2) ; |
| // && (contentLength == contentLength2); |
| } catch (NamingException e) { |
| return false; |
| } |
| } |
| |
| |
| /** |
| * Load entry into cache. |
| */ |
| protected boolean cacheLoad(CacheEntry entry) { |
| |
| if (cache == null) |
| return false; |
| |
| String name = entry.name; |
| |
| // Retrieve missing info |
| |
| // 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) { |
| return false; |
| } |
| } |
| |
| // Retriving object |
| if ((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())); |
| // } |
| entry.resource=object; |
| } catch (NamingException e) { |
| return false; |
| } |
| } |
| |
| // TODO: lazy loading. We may list a dir, there's no reason to load |
| // all entries ( we may just look at attributes ) |
| |
| // Load object content. We cache entries without content ( users, etc ) |
| /* |
| if ((entry.resource != null) && (entry.resource.getContent() == null) |
| // && (entry.attributes.getContentLength() >= 0) |
| && (entry.attributes.getContentLength() < cacheObjectMaxSize)) { |
| int length = (int) entry.attributes.getContentLength(); |
| 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 timestamp |
| entry.timestamp = System.currentTimeMillis() + cacheTTL; |
| |
| // Add new entry to cache |
| cache.put(name, entry); |
| |
| return true; |
| |
| } |
| |
| |
| /** |
| * Remove entry from cache. |
| */ |
| protected boolean cacheUnload(String name) { |
| if (cache == null) |
| return false; |
| return (cache.remove(name) != null); |
| } |
| |
| // ------------------------------------------------- CacheEntry Inner Class |
| |
| |
| protected class CacheEntry { |
| |
| |
| // ------------------------------------------------- Instance Variables |
| |
| |
| long timestamp = -1; |
| String name = null; |
| Attributes attributes = null; |
| //ResourceAttributes attributes = null; |
| Object resource = null; |
| DirContext context = null; |
| |
| |
| // ----------------------------------------------------- Public Methods |
| |
| |
| public void recycle() { |
| timestamp = -1; |
| name = null; |
| attributes = null; |
| resource = null; |
| context = null; |
| } |
| |
| |
| public String toString() { |
| return ("Cache entry: " + name + "\n" |
| + "Attributes: " + attributes + "\n" |
| + "Resource: " + resource + "\n" |
| + "Context: " + context); |
| } |
| |
| |
| } |
| |
| |
| } |
| |
