org.toobsframework.pres.base.ManagerBase.java Source code

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Here is the source code for org.toobsframework.pres.base.ManagerBase.java

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/*
 * This file is licensed to the Toobs Framework Group under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The Toobs Framework Group 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.toobsframework.pres.base;

import java.io.IOException;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.core.io.Resource;
import org.toobsframework.pres.resources.IResourceCacheLoader;
import org.toobsframework.pres.resources.ResourceCacheDescriptor;
import org.toobsframework.pres.resources.ResourceUnmarshaller;
import org.toobsframework.util.Configuration;

/**
 * Common ancestor for the managers
 * @author jaimeg@yahoo-inc.com
 *
 */
public abstract class ManagerBase implements ApplicationContextAware, InitializingBean {
    protected final Log log = LogFactory.getLog(getClass());

    private static boolean initDone = false;
    private List<String> configFiles = null;
    private ResourceCacheDescriptor[] resourceCache = null;
    private boolean doReload = false;

    protected ApplicationContext applicationContext;
    protected Configuration configuration;

    public void afterPropertiesSet() throws Exception {
        doReload = configuration.doReload();
    }

    protected void initCache() {
        int l = configFiles.size();
        resourceCache = new ResourceCacheDescriptor[l];
        for (int fileCounter = 0; fileCounter < l; fileCounter++) {
            String fileSpec = configFiles.get(fileCounter);
            try {
                if (log.isDebugEnabled()) {
                    log.debug("Checking Configuration file spec: " + fileSpec);
                }
                resourceCache[fileCounter] = new ResourceCacheDescriptor(applicationContext, fileSpec);
            } catch (Exception ex) {
                log.error("ComponentLayout initialization failed " + ex.getMessage(), ex);
            }
        }
    }

    public void loadConfig(final Class<?> clazz) {
        final ResourceUnmarshaller unmarshaller = new ResourceUnmarshaller();
        if (configFiles == null) {
            return;
        }
        if (resourceCache == null) {
            initCache();
        }

        for (int fileCounter = 0; fileCounter < resourceCache.length; fileCounter++) {
            String fileSpec = configFiles.get(fileCounter);
            try {
                if (log.isDebugEnabled()) {
                    log.debug("Checking Configuration file spec: " + fileSpec);
                }
                Resource[] resources = null;
                if (doReload) {
                    resources = resourceCache[fileCounter].checkIfModified();
                    // This call is only done if doReload is desired.  This call can be
                    // low performance so it is only good for development
                    if (resources == null) {
                        continue;
                    }
                }
                resourceCache[fileCounter].load(resources, doReload, new IResourceCacheLoader() {
                    public void load(Resource resource) throws IOException {
                        Object object = unmarshaller.unmarshall(resource, clazz);
                        registerConfiguration(object, resource.getFilename());
                    }
                });
            } catch (Exception ex) {
                log.error("ComponentLayout initialization failed " + ex.getMessage(), ex);
            }
        }
        initDone = true;
    }

    /**
     * Implement this method to register a resource found by the loadResources method
     * @param object - is the object of the class specified in the loadConfig call
     * @param fileName - is the name where the resource was found
     */
    protected abstract void registerConfiguration(Object object, String fileName);

    /**
     * @return the initDone
     */
    public static boolean isInitDone() {
        return initDone;
    }

    /**
     * @param initDone the initDone to set
     */
    public static void setInitDone(boolean initDone) {
        ManagerBase.initDone = initDone;
    }

    protected boolean isDoReload() {
        return configuration.doReload();
    }

    protected boolean useTranslets() {
        return configuration.useTranslets();
    }

    protected boolean useChain() {
        return configuration.useChain();
    }

    public List<String> getConfigFiles() {
        return configFiles;
    }

    public void setConfigFiles(List<String> configFiles) {
        this.configFiles = configFiles;
    }

    public void addConfigFiles(List<String> configFiles) {
        this.configFiles.addAll(configFiles);
    }

    public void addConfigFile(String configFile) {
        this.configFiles.add(configFile);
    }

    public void insertConfigFile(String configFile) {
        this.configFiles.add(0, configFile);
    }

    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }

    public void setConfiguration(Configuration configuration) {
        this.configuration = configuration;
    }

}