com.glaf.core.startup.BootstrapManager.java Source code

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Here is the source code for com.glaf.core.startup.BootstrapManager.java

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/*
 * 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.
 */

package com.glaf.core.startup;

import java.util.Enumeration;
import java.util.List;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicBoolean;

import javax.servlet.ServletContext;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.glaf.core.base.ConnectionDefinition;
import com.glaf.core.config.DBConfiguration;
import com.glaf.core.jdbc.DBConnectionFactory;
import com.glaf.core.util.ClassUtils;

public class BootstrapManager {
    private static class BootstrapManagerHolder {
        public static BootstrapManager instance = new BootstrapManager();
    }

    private static final Log logger = LogFactory.getLog(BootstrapManager.class);

    protected static AtomicBoolean running = new AtomicBoolean(false);

    public static BootstrapManager getInstance() {
        return BootstrapManagerHolder.instance;
    }

    private BootstrapManager() {

    }

    public void startup(ServletContext context) {
        if (!running.get()) {
            try {
                running.set(true);
                BootstrapProperties.reload();
                Properties props = BootstrapProperties.getProperties();
                if (props != null && props.keys().hasMoreElements()) {
                    Enumeration<?> e = props.keys();
                    while (e.hasMoreElements()) {
                        String className = (String) e.nextElement();
                        String value = props.getProperty(className);
                        try {
                            Object obj = ClassUtils.instantiateObject(className);
                            if (obj instanceof Bootstrap) {
                                Bootstrap bootstrap = (Bootstrap) obj;
                                bootstrap.startup(context, value);
                            }
                        } catch (Exception ex) {
                            ex.printStackTrace();
                            logger.error(ex);
                        }
                    }
                }

                ConnectionConfigProperties.reload();
                Properties p = ConnectionConfigProperties.getProperties();
                if (p != null && p.keys().hasMoreElements()) {
                    Enumeration<?> e = p.keys();
                    while (e.hasMoreElements()) {
                        String className = (String) e.nextElement();
                        try {
                            Object object = ClassUtils.instantiateObject(className);
                            if (object instanceof ConnectionConfig) {
                                ConnectionConfig model = (ConnectionConfig) object;
                                List<ConnectionDefinition> rows = model.getConnectionDefinitions();
                                if (rows != null && !rows.isEmpty()) {
                                    for (ConnectionDefinition conn : rows) {
                                        if (DBConnectionFactory.checkConnection(conn.getName())) {
                                            continue;
                                        }
                                        String dbType = conn.getType();
                                        String host = conn.getHost();

                                        int port = conn.getPort();
                                        String databaseName = conn.getDatabase();
                                        String user = conn.getUser();
                                        String password = conn.getPassword();

                                        DBConfiguration.addDataSourceProperties(conn.getName(), dbType, host, port,
                                                databaseName, user, password);
                                    }
                                }
                            }
                        } catch (Exception ex) {
                            ex.printStackTrace();
                            logger.error(ex);
                        }
                    }
                }
            } catch (Exception ex) {
                throw new RuntimeException(ex);
            } finally {
                running.set(false);
            }
        }
    }

    public static void main(String[] args) {
        BootstrapManager.getInstance().startup(null);
    }

}