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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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 io.undertow.server.handlers.resource;

import io.undertow.UndertowMessages;

import java.io.Closeable;
import java.io.IOException;

/**
 *
 * Representation of a resource manager. A resource manager knows how to obtain
 * a resource for a given path.
 *
 * @author Stuart Douglas
 */
public interface ResourceManager extends Closeable {

    /**
     * Returns a resource for the given path.
     *
     * It is the responsibility of the called to make sure that the path in Canonicalised.
     *
     * @param path The path
     * @return The resource representing the path, or null if no resource was found.
     */
    Resource getResource(final String path) throws IOException;

    /**
     *
     * @return true if a resource change listener is supported
     */
    boolean isResourceChangeListenerSupported();

    /**
     * Registers a resource change listener, if the underlying resource manager support it
     * @param listener The listener to register
     * @throws IllegalArgumentException If resource change listeners are not supported
     */
    void registerResourceChangeListener(final ResourceChangeListener listener);

    /**
     * Removes a resource change listener
     * @param listener
     */
    void removeResourceChangeListener(final ResourceChangeListener listener);

    ResourceManager EMPTY_RESOURCE_MANAGER = new ResourceManager() {
        @Override
        public Resource getResource(final String path){
            return null;
        }

        @Override
        public boolean isResourceChangeListenerSupported() {
            return false;
        }

        @Override
        public void registerResourceChangeListener(ResourceChangeListener listener) {
            throw UndertowMessages.MESSAGES.resourceChangeListenerNotSupported();
        }

        @Override
        public void removeResourceChangeListener(ResourceChangeListener listener) {
            throw UndertowMessages.MESSAGES.resourceChangeListenerNotSupported();
        }

        @Override
        public void close() throws IOException {
        }
    };
}