org.codehaus.redback.rest.services.DefaultUtilServices.java Source code

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Here is the source code for org.codehaus.redback.rest.services.DefaultUtilServices.java

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package org.codehaus.redback.rest.services;
/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.
 */

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.codehaus.redback.rest.api.services.RedbackServiceException;
import org.codehaus.redback.rest.api.services.UtilServices;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @author Olivier Lamy
 * @since 1.4
 */
@Service("utilServices#rest")
public class DefaultUtilServices implements UtilServices {

    private Logger log = LoggerFactory.getLogger(getClass());

    private Map<String, String> cachei18n = new ConcurrentHashMap<String, String>();

    @PostConstruct
    public void init() throws RedbackServiceException {

        // preload i18n en and fr
        getI18nProperties("en");
        getI18nProperties("fr");
    }

    public String getI18nResources(String locale) throws RedbackServiceException {
        String cachedi18n = cachei18n.get(StringUtils.isEmpty(locale) ? "en" : StringUtils.lowerCase(locale));
        if (cachedi18n != null) {
            return cachedi18n;
        }

        Properties properties = new Properties();

        // load redback user api messages
        try {

            // load default first then requested locale
            loadResource(properties, "org/codehaus/plexus/redback/users/messages", null);
            loadResource(properties, "org/codehaus/plexus/redback/users/messages", locale);

        } catch (IOException e) {
            log.warn("skip error loading properties {}", "org/codehaus/plexus/redback/users/messages");
        }

        try {

            // load default first then requested locale
            loadResource(properties, "org/codehaus/redback/i18n/default", null);
            loadResource(properties, "org/codehaus/redback/i18n/default", locale);

        } catch (IOException e) {
            log.warn("skip error loading properties {}", "org/codehaus/redback/i18n/default");
        }

        StringBuilder output = new StringBuilder();

        for (Map.Entry<Object, Object> entry : properties.entrySet()) {
            output.append((String) entry.getKey()).append('=').append((String) entry.getValue());
            output.append('\n');
        }

        cachei18n.put(StringUtils.isEmpty(locale) ? "en" : StringUtils.lowerCase(locale), output.toString());

        return output.toString();
    }

    public Properties getI18nProperties(String locale) throws RedbackServiceException {
        try {
            Properties properties = new Properties();
            // load default first then requested locale
            loadResource(properties, "org/codehaus/plexus/redback/users/messages", null);
            loadResource(properties, "org/codehaus/plexus/redback/users/messages", locale);

            loadResource(properties, "org/codehaus/redback/i18n/default", null);
            loadResource(properties, "org/codehaus/redback/i18n/default", locale);
            return properties;
        } catch (IOException e) {
            throw new RedbackServiceException(e.getMessage());
        }
    }

    private void loadResource(final Properties finalProperties, String resourceName, String locale)
            throws IOException {
        InputStream is = null;
        Properties properties = new Properties();
        try {
            if (StringUtils.isNotEmpty(locale)) {
                resourceName = resourceName + "_" + locale;
            }
            resourceName = resourceName + ".properties";
            is = Thread.currentThread().getContextClassLoader().getResourceAsStream(resourceName.toString());
            if (is != null) {
                properties.load(is);
                finalProperties.putAll(properties);
            } else {
                if (!StringUtils.equalsIgnoreCase(locale, "en")) {
                    log.info("cannot load resource {}", resourceName);
                }
            }
        } finally {
            IOUtils.closeQuietly(is);
        }

    }

}