DefaultResourceRegistry.java

/*
 * Licensed to Luca Cavanna (the "Author") under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Elastic Search 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.elasticsearch.shell;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.Closeable;
import java.util.ArrayList;
import java.util.List;

/**
 * @author Luca Cavanna
 *
 * Default implementation of {@link ResourceRegistry}
 */
public class DefaultResourceRegistry implements ResourceRegistry {

    private static final Logger logger = LoggerFactory.getLogger(DefaultResourceRegistry.class);

    private final List<Closeable> resources = new ArrayList<Closeable>();

    @Override
    public void registerResource(Closeable resource) {
        resources.add(resource);
    }

    @Override
    public void closeAllResources() {
        logger.debug("Closing all registered resources");
        for (Closeable resource : resources) {
            try {
                resource.close();
                logger.debug("Resource {} closed", resource);
            } catch (Throwable t) {
                logger.error("Error while closing resource", t);
            }
        }
    }
}