001/*
002 * Copyright (c) 2012, 2015, Credit Suisse (Anatole Tresch), Werner Keil and others by the @author tag.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
005 * use this file except in compliance with the License. You may obtain a copy of
006 * the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
012 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
013 * License for the specific language governing permissions and limitations under
014 * the License.
015 */
016package org.javamoney.moneta.spi.loader;
017
018import java.util.Map;
019import java.util.logging.Level;
020import java.util.logging.Logger;
021
022public class LoadDataLoaderService {
023
024        private static final Logger LOG = Logger.getLogger(DefaultLoaderListener.class.getName());
025
026        private final DefaultLoaderListener listener;
027
028   LoadDataLoaderService(DefaultLoaderListener listener) {
029                this.listener = listener;
030        }
031
032        public boolean execute(String resourceId,
033                        Map<String, LoadableResource> resources) {
034
035                LoadableResource load = resources.get(resourceId);
036                if (load!=null) {
037                        try {
038                                if (load.load()) {
039                                        LOG.log(Level.INFO, "Read data from: " + load.getRemoteResources());
040                                        listener.trigger(resourceId, load.getDataStream());
041                                        LOG.log(Level.INFO, "New data successfully loaded from: " + load.getRemoteResources());
042                                        return true;
043                                }
044                        } catch (Exception e) {
045                                LOG.log(Level.WARNING, "Failed to read/load resource (checking fallback): " + resourceId,
046                                                e);
047                        }
048                        try {
049                                if (load.loadFallback()) {
050                                        LOG.log(Level.WARNING, "Read fallback data from: " + load.getFallbackResource());
051                                        listener.trigger(resourceId, load.getDataStream());
052                                        LOG.log(Level.WARNING, "Loaded fallback data from: " + load.getFallbackResource());
053                                        return true;
054                                }
055                        } catch (Exception e) {
056                                LOG.log(Level.SEVERE, "Failed to read/load fallback resource: " + resourceId,
057                                                e);
058                        }
059                } else {
060                        throw new IllegalArgumentException("No such resource: "
061                                        + resourceId);
062                }
063                return false;
064        }
065
066        @Override
067        public String toString() {
068                return LoadDataLoaderService.class.getName() + '{' + " listener: " + listener + '}';
069        }
070
071}