org.jivesoftware.openfire.container.PluginCacheConfigurator Maven / Gradle / Ivy

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/*
 * Copyright (C) 2005-2008 Jive Software. All rights reserved.
 *
 * 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 org.jivesoftware.openfire.container;

import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * A helper class to read cache configuration data for a plugin and register the defined caches with
 * the cache factory. Definitions should look something like this:
 *  * {@code
 * 
 *     
 *           My Cache
 *           optimistic
 *           
 *               
 *                   back-size-high
 *                   131072
 *               
 *               
 *                   back-expiry
 *                   6h
 *               
 *               
 *                   back-size-low
 *                   117965
 *               
 *           
 *     
 * 
 * }
 * 
 */
public class PluginCacheConfigurator {

    private static final Logger Log = LoggerFactory.getLogger(PluginCacheConfigurator.class);

    private InputStream configDataStream;

    public void setInputStream(InputStream configDataStream) {
        this.configDataStream = configDataStream;
    }

    public void configure(String pluginName) {
        try {
            SAXReader saxReader = new SAXReader();
            saxReader.setEncoding("UTF-8");
            Document cacheXml = saxReader.read(configDataStream);
            List mappings = cacheXml.selectNodes("/cache-config/cache-mapping");
            for (Node mapping: mappings) {
                registerCache(pluginName, mapping);
            }
        }
        catch (DocumentException e) {
            Log.error(e.getMessage(), e);
        }
    }

    private void registerCache(String pluginName, Node configData) {
        String cacheName = configData.selectSingleNode("cache-name").getStringValue();
        String schemeName = configData.selectSingleNode("scheme-name").getStringValue();
        if (cacheName == null || schemeName == null) {
            throw new IllegalArgumentException("Both cache-name and scheme-name elements are required. Found cache-name: " + cacheName +
            " and scheme-name: " + schemeName);
        }

        Map initParams = readInitParams(configData);
        CacheInfo info = new CacheInfo(cacheName, CacheInfo.Type.valueof(schemeName), initParams);
        PluginCacheRegistry.getInstance().registerCache(pluginName, info);
    }

    private Map readInitParams(Node configData) {
        Map paramMap = new HashMap<>();
        List params = configData.selectNodes("init-params/init-param");
        for (Node param : params) {
            String paramName = param.selectSingleNode("param-name").getStringValue();
            String paramValue = param.selectSingleNode("param-value").getStringValue();
            paramMap.put(paramName, paramValue);
        }

        return paramMap;
    }

}