com.gamma.dam.conf.db.DBConfigReader.java Source code

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Here is the source code for com.gamma.dam.conf.db.DBConfigReader.java

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/*
 * **********************************************************************************************
 *  Copyright (C) 2013 Gamma Analytics, Inc. All rights reserved.                               *
 *  http://www.gammanalytics.com/                                                               *
 *  --------------------------------------------------------------------------------------------*
 *  The software in this package is published under the terms of the EUL (End User license)     *
 *  agreement a copy of which has been included with this distribution in the license.txt file. *
 * **********************************************************************************************
 */
package com.gamma.dam.conf.db;

import java.io.File;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import com.gamma.dam.conf.ResourceProperties;
import com.gamma.dam.exceptions.DAMConfigurationException;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.XMLConfiguration;
import org.apache.commons.configuration.HierarchicalConfiguration.Node;
import org.apache.commons.configuration.reloading.FileChangedReloadingStrategy;
import org.apache.commons.configuration.reloading.ReloadingStrategy;
import org.apache.commons.configuration.tree.ConfigurationNode;

/**
 * The Class DBConfigReader.
 * 
 * @author abhijit
 */
public class DBConfigReader {

    /** The reader. */
    private static DBConfigReader reader;

    /** The dbs. */
    private Map<String, DBConfig> dbs = new HashMap<>();

    /**
     * Instance.
     *
     * @return the DB config reader
     */
    public static synchronized DBConfigReader instance() {
        if (reader == null) {
            reader = new DBConfigReader();
        }
        return reader;
    }

    /**
     * Instantiates a new DB config reader.
     */
    private DBConfigReader() {
        String basePath = ResourceProperties.instance().getValue(ResourceProperties.DATABASE_CONF);
        String home = System.getProperty("DAM_HOME");
        if (home != null) {
            basePath = home + File.separator + basePath;
        }
        try {
            XMLConfiguration xml = new XMLConfiguration(basePath);
            ReloadingStrategy strategy = new FileChangedReloadingStrategy();
            xml.setReloadingStrategy(strategy);
            Node node = xml.getRoot();
            if (node.hasChildren()) {
                for (ConfigurationNode n : node.getChildren()) {
                    DBConfig db = new DBConfig();
                    String name = null;
                    if (n.getAttributeCount() > 0) {
                        for (ConfigurationNode attr : n.getAttributes()) {
                            switch (attr.getName()) {
                            case "id":

                                break;
                            case "name":
                                name = (String) attr.getValue();
                                break;

                            default:
                                break;
                            }
                        }
                    }

                    db.parse(n);
                    dbs.put(name, db);
                }
            }
        } catch (ConfigurationException e) {
            throw new DAMConfigurationException(e);
        }
    }

    /**
     * Gets the DB configs.
     *
     * @return the DB configs
     */
    public Map<String, DBConfig> getDBConfigs() {
        return dbs;
    }

    public DBConfig getDataBaseInfo(String dbName) {
        return dbs.get(dbName);
    }

    public Collection<DBConfig> getAllDataBases() {
        return dbs.values();
    }
}