Overwrite an existing binding in LADP - Java JNDI

Java examples for JNDI:Context

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Description

Overwrite an existing binding in LADP

Demo Code



import javax.naming.*;
import java.io.File;
import java.util.Hashtable;
import javax.naming.spi.ObjectFactory;
/**/*from  w  ww.j a v a  2s  .  c o  m*/
 * This class is used by the Bind example.
 * It is a referenceable class that can be stored by service
 * providers like the LDAP and file system providers.
 */
class Fruit implements Referenceable {
    String fruit;

    public Fruit(String f) {
        fruit = f;
    }

    public Reference getReference() throws NamingException {

        return new Reference(Fruit.class.getName(), new StringRefAddr(
                "fruit", fruit), FruitFactory.class.getName(), null); // factory location
    }

    public String toString() {
        return fruit;
    }
}

/**
 * This is an object factory that when given a reference for a Fruit
 * object, will create an instance of the corresponding Fruit.
 */
 class FruitFactory implements ObjectFactory {

    public FruitFactory() {
    }

    public Object getObjectInstance(Object obj, Name name, Context ctx,
            Hashtable<?, ?> env) throws Exception {

        if (obj instanceof Reference) {
            Reference ref = (Reference) obj;

            if (ref.getClassName().equals(Fruit.class.getName())) {
                RefAddr addr = ref.get("fruit");
                if (addr != null) {
                    return new Fruit((String) addr.getContent());
                }
            }
        }
        return null;
    }
}
/**
 * Demonstrates how to overwrite an existing binding.
 * (Use after Bind example; Use Unbind to remove binding).
 *
 * usage: java Rebind
 */
class Rebind {
    public static void main(String[] args) {

        // Set up the environment for creating the initial context
        Hashtable<String, Object> env = new Hashtable<String, Object>(11);
        env.put(Context.INITIAL_CONTEXT_FACTORY,
                "com.sun.jndi.ldap.LdapCtxFactory");
        env.put(Context.PROVIDER_URL, "ldap://localhost:389/o=JNDITutorial");

        try {
            // Create the initial context
            Context ctx = new InitialContext(env);

            // Create the object to be bound
            Fruit fruit = new Fruit("lemon");

            // Perform the bind
            ctx.rebind("cn=Favorite Fruit", fruit);

            // Check that it is bound
            Object obj = ctx.lookup("cn=Favorite Fruit");
            System.out.println(obj);

            // Close the context when we're done
            ctx.close();
        } catch (NamingException e) {
            System.out.println("Operation failed: " + e);
        }
    }
}

/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

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