EDIT

// $Id$

/**

 * Copyright (C) 2009 EDIT

 * European Distributed Institute of Taxonomy

 * http://www.e-taxonomy.eu

 *

 * The contents of this file are subject to the Mozilla Public License Version 1.1

 * See LICENSE.TXT at the top of this package for the full license terms.

 */

package eu.etaxonomy.cdm.server;

import static eu.etaxonomy.cdm.server.CommandOptions.DATASOURCES_FILE;

import static eu.etaxonomy.cdm.server.CommandOptions.HELP;

import static eu.etaxonomy.cdm.server.CommandOptions.HTTP_PORT;

import static eu.etaxonomy.cdm.server.CommandOptions.JMX;

import static eu.etaxonomy.cdm.server.CommandOptions.WEBAPP;

import static eu.etaxonomy.cdm.server.CommandOptions.WIN32SERVICE;

import static eu.etaxonomy.cdm.server.CommandOptions.LOG_DIR;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.lang.management.ManagementFactory;

import java.lang.reflect.InvocationTargetException;

import java.net.URL;

import java.sql.Connection;

import java.sql.SQLException;

import java.util.List;

import java.util.Properties;

import java.util.Set;

import javax.naming.NamingException;

import javax.sql.DataSource;

import org.apache.commons.cli.CommandLine;

import org.apache.commons.cli.CommandLineParser;

import org.apache.commons.cli.GnuParser;

import org.apache.commons.cli.HelpFormatter;

import org.apache.commons.cli.ParseException;

import org.apache.commons.io.FileUtils;

import org.apache.log4j.Logger;

import org.apache.log4j.PatternLayout;

import org.apache.log4j.RollingFileAppender;

import org.eclipse.jetty.jmx.MBeanContainer;

import org.eclipse.jetty.security.HashLoginService;

import org.eclipse.jetty.server.Server;

import org.eclipse.jetty.server.handler.ContextHandlerCollection;

import org.eclipse.jetty.server.handler.ContextHandler.Context;

import org.eclipse.jetty.util.component.LifeCycle;

import org.eclipse.jetty.util.component.LifeCycle.Listener;

import org.eclipse.jetty.util.log.Log;

import org.eclipse.jetty.webapp.WebAppClassLoader;

import org.eclipse.jetty.webapp.WebAppContext;

import eu.etaxonomy.cdm.server.CdmInstanceProperties.Status;

import eu.etaxonomy.cdm.server.win32service.Win32Service;

/**

 * A bootstrap class for starting Jetty Runner using an embedded war.

 *

 * Recommended start options for the java virtual machine:

 * <pre>

 * -Xmx1024M

 *

 * -XX:PermSize=128m

 * -XX:MaxPermSize=192m

 *

 * -XX:+UseConcMarkSweepGC

 * -XX:+CMSClassUnloadingEnabled

 * -XX:+CMSPermGenSweepingEnabled

 * </pre>

 *

 * @version $Revision$

 */

public final class Bootloader {

    /**

     *

     */

    private static final String VERSION_PROPERTIES_FILE = "version.properties";

    //private static final String DEFAULT_WARFILE = "target/";

    /**

     * @author a.kohlbecker

     * @date 03.02.2011

     *

     */

    private class WebAppContextListener implements Listener {

        WebAppContext cdmWebappContext;

        /**

         * @param cdmWebappContext

         */

        public WebAppContextListener(WebAppContext cdmWebappContext) {

            this.cdmWebappContext = cdmWebappContext;

        }

        @Override

        public void lifeCycleStopping(LifeCycle event) {

            logger.info("lifeCycleStopping");

        }

        @Override

        public void lifeCycleStopped(LifeCycle event) {

            logger.info("lifeCycleStopped");

        }

        @Override

        public void lifeCycleStarting(LifeCycle event) {

            logger.info("lifeCycleStarting");

        }

        @SuppressWarnings("unchecked")

        @Override

        public void lifeCycleStarted(LifeCycle event) {

            logger.info("lifeCycleStarted");

            List<String> messages = getServletContextAttribute(cdmWebappContext, ATTRIBUTE_ERROR_MESSAGES, List.class);

            String dataSourceName = getServletContextAttribute(cdmWebappContext, ATTRIBUTE_DATASOURCE_NAME, String.class);

            if(messages != null && dataSourceName != null){

                CdmInstanceProperties configAndStatus = findConfigAndStatusFor(dataSourceName);

                configAndStatus.getProblems().addAll(messages);

                configAndStatus.setStatus(Status.error);

                try {

                    logger.warn("Stopping context '" + dataSourceName + "' due to errors reported in ServletContext");

                    cdmWebappContext.stop();

                } catch (Exception e) {

                    logger.error(e);

                }

            }

        }

        @Override

        public void lifeCycleFailure(LifeCycle event, Throwable cause) {

            logger.error("lifeCycleFailure");

        }

    }

    private static final Logger logger = Logger.getLogger(Bootloader.class);

    private static final String DATASOURCE_BEANDEF_FILE = "datasources.xml";

    private static final String REALM_PROPERTIES_FILE = "cdm-server-realm.properties";

    private static final String USERHOME_CDM_LIBRARY_PATH = System.getProperty("user.home")+File.separator+".cdmLibrary"+File.separator;

    private static final String TMP_PATH = USERHOME_CDM_LIBRARY_PATH + "server" + File.separator;

    private static final String LOG_PATH = USERHOME_CDM_LIBRARY_PATH + "log" + File.separator;

    private static final String APPLICATION_NAME = "CDM Server";

    private static final String WAR_POSTFIX = ".war";

    private static final String CDMLIB_REMOTE_WEBAPP = "cdmlib-remote-webapp";

    private static final String CDMLIB_REMOTE_WEBAPP_VERSION = "cdmlib-remote-webapp.version";

    private static final String DEFAULT_WEBAPP_WAR_NAME = "default-webapp";

    private static final File DEFAULT_WEBAPP_TEMP_FOLDER = new File(TMP_PATH + DEFAULT_WEBAPP_WAR_NAME);

    private static final File CDM_WEBAPP_TEMP_FOLDER = new File(TMP_PATH + CDMLIB_REMOTE_WEBAPP);

    private static final String ATTRIBUTE_JDBC_JNDI_NAME = "cdm.jdbcJndiName";

    private static final String ATTRIBUTE_DATASOURCE_NAME = "cdm.datasource";

    private static final String ATTRIBUTE_CDM_LOGFILE = "cdm.logfile";

    /**

     * same as in eu.etaxonomy.cdm.remote.config.DataSourceConfigurer

     */

    private static final String ATTRIBUTE_ERROR_MESSAGES = "cdm.errorMessages";

    // memory requirements

    private static final long MB = 1024 * 1024;

    private static final long PERM_GEN_SPACE_PER_INSTANCE = 64 * MB;

    private static final long HEAP_PER_INSTANCE = 150 * MB;

    private static final int KB = 1024;

    private Set<CdmInstanceProperties> configAndStatusSet = null;

    public Set<CdmInstanceProperties> getConfigAndStatus() {

        return configAndStatusSet;

    }

    private File cdmRemoteWebAppFile = null;

    private File defaultWebAppFile = null;

    private String logPath = null;

    private Server server = null;

    private ContextHandlerCollection contexts = new ContextHandlerCollection();

    private CommandLine cmdLine;

    /* thread save singleton implementation */

    private static Bootloader instance = new Bootloader();

    private Bootloader() {}

    /**

     * @return the thread save singleton instance of the Bootloader

     */

    public synchronized static Bootloader getBootloader(){

        return instance;

    }

    /* end of singleton implementation */

    private Set<CdmInstanceProperties> loadDataSources(){

        if(configAndStatusSet == null){

            File datasourcesFile = new File(USERHOME_CDM_LIBRARY_PATH, DATASOURCE_BEANDEF_FILE);

            configAndStatusSet = DataSourcePropertyParser.parseDataSourceConfigs(datasourcesFile);

            logger.info("cdm server instance names loaded: "+ configAndStatusSet.toString());

        }

        return configAndStatusSet;

    }

    public int writeStreamTo(final InputStream input, final OutputStream output, int bufferSize) throws IOException {

        int available = Math.min(input.available(), 256 * KB);

        byte[] buffer = new byte[Math.max(bufferSize, available)];

        int answer = 0;

        int count = input.read(buffer);

        while (count >= 0) {

            output.write(buffer, 0, count);

            answer += count;

            count = input.read(buffer);

        }

        return answer;

    }

    private boolean bindJndiDataSource(CdmInstanceProperties conf) {

        try {

            Class<DataSource> dsCass = (Class<DataSource>) Thread.currentThread().getContextClassLoader().loadClass("com.mchange.v2.c3p0.ComboPooledDataSource");

            DataSource datasource = dsCass.newInstance();

            dsCass.getMethod("setDriverClass", new Class[] {String.class}).invoke(datasource, new Object[] {conf.getDriverClass()});

            dsCass.getMethod("setJdbcUrl", new Class[] {String.class}).invoke(datasource, new Object[] {conf.getUrl()});

            dsCass.getMethod("setUser", new Class[] {String.class}).invoke(datasource, new Object[] {conf.getUsername()});

            dsCass.getMethod("setPassword", new Class[] {String.class}).invoke(datasource, new Object[] {conf.getPassword()});

            Connection connection = null;

            String sqlerror = null;

            try {

                connection = datasource.getConnection();

                connection.close();

            } catch (SQLException e) {

                sqlerror = e.getMessage() + "["+ e.getSQLState() + "]";

                conf.getProblems().add(sqlerror);

                if(connection !=  null){

                    try {connection.close();} catch (SQLException e1) { /* IGNORE */ }

                }

                logger.error(conf.toString() + " has problem : "+ sqlerror );

            }

            if(!conf.hasProblems()){

                logger.info("binding jndi datasource at " + conf.getJdbcJndiName() + " with "+conf.getUsername() +"@"+ conf.getUrl());

                org.eclipse.jetty.plus.jndi.Resource jdbcResource = new org.eclipse.jetty.plus.jndi.Resource(conf.getJdbcJndiName(), datasource);

                return true;

            }

        } catch (IllegalArgumentException e) {

            logger.error(e);

            e.printStackTrace();

        } catch (SecurityException e) {

            logger.error(e);

        } catch (ClassNotFoundException e) {

            logger.error(e);

        } catch (InstantiationException e) {

            logger.error(e);

        } catch (IllegalAccessException e) {

            logger.error(e);

        } catch (InvocationTargetException e) {

            logger.error(e);

        } catch (NoSuchMethodException e) {

            logger.error(e);

        } catch (NamingException e) {

            logger.error(e);

        }

        return false;

    }

    public void parseCommandOptions(String[] args) throws ParseException {

        CommandLineParser parser = new GnuParser();

        cmdLine = parser.parse( CommandOptions.getOptions(), args );

         // print the help message

         if(cmdLine.hasOption(HELP.getOpt())){

             HelpFormatter formatter = new HelpFormatter();

             formatter.setWidth(200);

             formatter.printHelp( "java .. ", CommandOptions.getOptions() );

             System.exit(0);

         }

    }

    private File extractWar(String warName) throws IOException, FileNotFoundException {

        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();

        String warFileName = warName + WAR_POSTFIX;

        // 1. find in classpath

        URL resource = classLoader.getResource(warFileName);

        if (resource == null) {

            logger.error("Could not find the " + warFileName + " on classpath!");

            File pomxml = new File("pom.xml");

            if(pomxml.exists()){

                // 2. try finding in target folder of maven project

                File warFile = new File("target" + File.separator + warFileName);

                logger.debug("looging for war file at " + warFile.getAbsolutePath());

                if (warFile.canRead()) {

                    resource = warFile.toURI().toURL();

                } else {

                    logger.error("Also could not find the " + warFileName + " in maven project, try excuting 'mvn install'");

                }

            }

        }

        if (resource == null) {

            // no way finding the war file :-(

            System.exit(1);

        }

        File warFile = new File(TMP_PATH, warName + "-" + WAR_POSTFIX);

        logger.info("Extracting " + warFileName + " to " + warFile + " ...");

        writeStreamTo(resource.openStream(), new FileOutputStream(warFile), 8 * KB);

        logger.info("Extracted " + warFileName);

        return warFile;

    }

    /**

     * MAIN METHOD

     *

     * @param args

     * @throws Exception

     */

    public static void main(String[] args) throws Exception {

        Bootloader bootloader = Bootloader.getBootloader();

        bootloader.parseCommandOptions(args);

        bootloader.startServer();

    }

    public void startServer() throws IOException,

            FileNotFoundException, Exception, InterruptedException {

        if(cmdLine.hasOption(LOG_DIR.getOpt())){

            logPath = cmdLine.getOptionValue(LOG_DIR.getOpt());

        } else {

            logPath = LOG_PATH;

        }

        //assure LOG_PATH exists

        File logPathFile = new File(logPath);

        if(!logPathFile.exists()){

            FileUtils.forceMkdir(new File(logPath));

        }

        //append logger

        configureFileLogger();

        logger.info("Starting "+APPLICATION_NAME);

        logger.info("Using  " + System.getProperty("user.home") + " as home directory. Can be specified by -Duser.home=<FOLDER>");

        //assure TMP_PATH exists and clean it up

        File tempDir = new File(TMP_PATH);

        if(!tempDir.exists() && !tempDir.mkdirs()){

            logger.error("Error creating temporary directory for webapplications " + tempDir.getAbsolutePath());

            System.exit(-1);

        } else {

            if(FileUtils.deleteQuietly(tempDir)){

                tempDir.mkdirs();

                logger.info("Old webapplications successfully cleared");

            }

        }

        tempDir = null;

         // WARFILE

         if(cmdLine.hasOption(WEBAPP.getOpt())){

             cdmRemoteWebAppFile = new File(cmdLine.getOptionValue(WEBAPP.getOpt()));

             if(cdmRemoteWebAppFile.isDirectory()){

                 logger.info("using user defined web application folder: " + cdmRemoteWebAppFile.getAbsolutePath());

             } else {

                 logger.info("using user defined warfile: " + cdmRemoteWebAppFile.getAbsolutePath());

             }

             if(isRunningFromCdmRemoteWebAppSource()){

                 //TODO check if all local paths are valid !!!!

                defaultWebAppFile = new File("./src/main/webapp");

             } else {

                defaultWebAppFile = extractWar(DEFAULT_WEBAPP_WAR_NAME);

             }

         } else {

             // read version number

             String version = readCdmRemoteVersion();

             cdmRemoteWebAppFile = extractWar(CDMLIB_REMOTE_WEBAPP + "-" + version);

             defaultWebAppFile = extractWar(DEFAULT_WEBAPP_WAR_NAME);

         }

         // HTTP Port

         int httpPort = 8080;

         if(cmdLine.hasOption(HTTP_PORT.getOpt())){

             try {

                httpPort = Integer.parseInt(cmdLine.getOptionValue(HTTP_PORT.getOpt()));

                logger.info(HTTP_PORT.getOpt()+" set to "+cmdLine.getOptionValue(HTTP_PORT.getOpt()));

            } catch (NumberFormatException e) {

                logger.error("Supplied portnumber is not an integer");

                System.exit(-1);

            }

         }

         if(cmdLine.hasOption(DATASOURCES_FILE.getOpt())){

             logger.error(DATASOURCES_FILE.getOpt() + " NOT JET IMPLEMENTED!!!");

         }

        loadDataSources();

        verifyMemoryRequirements();

        server = new Server(httpPort);

        // JMX support

        if(cmdLine.hasOption(JMX.getOpt())){

            logger.info("adding JMX support ...");

            MBeanContainer mBeanContainer = new MBeanContainer(ManagementFactory.getPlatformMBeanServer());

            server.getContainer().addEventListener(mBeanContainer);

            mBeanContainer.addBean(Log.getLog());

            mBeanContainer.start();

        }

        if(cmdLine.hasOption(WIN32SERVICE.getOpt())){

            Win32Service win32Service = new Win32Service();

            win32Service.setServer(server);

            server.setStopAtShutdown(true);

            server.addBean(win32Service);

        }

        // add servelet contexts

        //

        // 1. default context

        //

        logger.info("preparing default WebAppContext");

        WebAppContext defaultWebappContext = new WebAppContext();

        setWebApp(defaultWebappContext, defaultWebAppFile);

        defaultWebappContext.setContextPath("/");

        defaultWebappContext.setTempDirectory(DEFAULT_WEBAPP_TEMP_FOLDER);

        // configure security context

        // see for reference * http://docs.codehaus.org/display/JETTY/Realms

        //                   * http://wiki.eclipse.org/Jetty/Starting/Porting_to_Jetty_7

        HashLoginService loginService = new HashLoginService();

        loginService.setConfig(USERHOME_CDM_LIBRARY_PATH + REALM_PROPERTIES_FILE);

        defaultWebappContext.getSecurityHandler().setLoginService(loginService);

        // Important:

        // the defaultWebappContext MUST USE the super classloader

        // otherwise the status page (index.jsp) might not work

        defaultWebappContext.setClassLoader(this.getClass().getClassLoader());

        contexts.addHandler(defaultWebappContext);

        //

        // 2. cdm server contexts

        //

        server.addLifeCycleListener(new LifeCycle.Listener(){

            @Override

            public void lifeCycleFailure(LifeCycle event, Throwable cause) {

                logger.error("Jetty LifeCycleFailure", cause);

            }

            @Override

            public void lifeCycleStarted(LifeCycle event) {

                logger.info("cdmserver has started, now adding CDM server contexts");

                try {

                    addCdmServerContexts(true);

                } catch (IOException e1) {

                    logger.error(e1);

                }

            }

            @Override

            public void lifeCycleStarting(LifeCycle event) {

            }

            @Override

            public void lifeCycleStopped(LifeCycle event) {

            }

            @Override

            public void lifeCycleStopping(LifeCycle event) {

            }

            });

        logger.info("setting contexts ...");

        server.setHandler(contexts);

        logger.info("starting jetty ...");

//        try {

            server.start();

//        } catch(org.springframework.beans.BeansException e){

//        	Throwable rootCause = null;

//        	while(e.getCause() != null){

//        		rootCause = e.getCause();

//        	}

//        	if(rootCause != null && rootCause.getClass().getSimpleName().equals("InvalidCdmVersionException")){

//

//        		logger.error("rootCause ----------->" + rootCause.getMessage());

////        		for(CdmInstanceProperties props : configAndStatus){

////        			if(props.getDataSourceName())

////        		}

//        	}

//        }

        if(cmdLine.hasOption(WIN32SERVICE.getOpt())){

            logger.info("jetty has started as win32 service");

        } else {

            server.join();

            logger.info(APPLICATION_NAME+" stopped.");

            System.exit(0);

        }

    }

    public String readCdmRemoteVersion() throws IOException {

        InputStream versionInStream = Bootloader.class.getClassLoader().getResourceAsStream(VERSION_PROPERTIES_FILE);

         Properties versionProperties = new Properties();

         versionProperties.load(versionInStream);

         String version = versionProperties.getProperty(CDMLIB_REMOTE_WEBAPP_VERSION);

        return version;

    }

    /**

     *

     */

    private void verifyMemoryRequirements() {

        verifyMemoryRequirement("PermGenSpace", PERM_GEN_SPACE_PER_INSTANCE, JvmManager.getPermGenSpaceUsage().getMax());

        verifyMemoryRequirement("HeapSpace", HEAP_PER_INSTANCE, JvmManager.getHeapMemoryUsage().getMax());

    }

    private void verifyMemoryRequirement(String memoryName, long requiredSpacePerIntance, long availableSpace) {

        long requiredSpace = configAndStatusSet.size() * requiredSpacePerIntance;

        if(requiredSpace > availableSpace){

            String message = memoryName + " ("

                + (availableSpace / MB)

                + "MB) insufficient for "

                + configAndStatusSet.size()

                + " instances. Increase " + memoryName + " to "

                + (requiredSpace / MB)

                + "MB";

                ;

            logger.error(message + " => disabling some instances!!!");

            // disabling some instances

            int i=0;

            for(CdmInstanceProperties instanceProps : configAndStatusSet){

                i++;

                if(i * requiredSpacePerIntance > availableSpace){

                    instanceProps.setStatus(Status.disabled);

                    instanceProps.getProblems().add("Disbled due to: " + message);

                }

            }

        }

    }

    /**

     * Configures and adds a {@link RollingFileAppender} to the root logger

     *

     * The log files of the cdm-remote instances are configured by the

     * {@link eu.etaxonomy.cdm.remote.config.LoggingConfigurer}

     */

    private void configureFileLogger() {

        PatternLayout layout = new PatternLayout("%d %p [%c] - %m%n");

        try {

            String logFile = logPath + File.separator + "cdmserver.log";

            RollingFileAppender appender = new RollingFileAppender(layout, logFile);

            appender.setMaxBackupIndex(3);

            appender.setMaxFileSize("2MB");

            Logger.getRootLogger().addAppender(appender);

            logger.info("logging to :" + logFile);

        } catch (IOException e) {

            logger.error("Creating RollingFileAppender failed:", e);

        }

    }

    private void addCdmServerContexts(boolean austostart) throws IOException {

        for(CdmInstanceProperties conf : configAndStatusSet){

            if(!conf.isEnabled()){

                logger.info(conf.getDataSourceName() + " is disabled => skipping");

                continue;

            }

            conf.setStatus(CdmInstanceProperties.Status.initializing);

            logger.info("preparing WebAppContext for '"+ conf.getDataSourceName() + "'");

            WebAppContext cdmWebappContext = new WebAppContext();

            cdmWebappContext.setContextPath("/"+conf.getDataSourceName());

            cdmWebappContext.setTempDirectory(CDM_WEBAPP_TEMP_FOLDER);

            if(!bindJndiDataSource(conf)){

                // a problem with the datasource occurred skip this webapp

                cdmWebappContext = null;

                logger.error("a problem with the datasource occurred -> skipping /" + conf.getDataSourceName());

                conf.setStatus(CdmInstanceProperties.Status.error);

                continue;

            }

            cdmWebappContext.setAttribute(ATTRIBUTE_DATASOURCE_NAME, conf.getDataSourceName());

            cdmWebappContext.setAttribute(ATTRIBUTE_JDBC_JNDI_NAME, conf.getJdbcJndiName());

            setWebApp(cdmWebappContext, cdmRemoteWebAppFile);

            cdmWebappContext.setAttribute(ATTRIBUTE_CDM_LOGFILE,

                    logPath + File.separator + "cdm-"

                            + conf.getDataSourceName() + ".log");

            if(cdmRemoteWebAppFile.isDirectory() && isRunningFromCdmRemoteWebAppSource()){

                /*

                 * when running the webapp from {projectpath} src/main/webapp we

                 * must assure that each web application is using it's own

                 * classloader thus we tell the WebAppClassLoader where the

                 * dependencies of the webapplication can be found. Otherwise

                 * the system classloader would load these resources.

                 */

                logger.info("Running webapp from source folder, thus adding java.class.path to WebAppClassLoader");

                WebAppClassLoader classLoader = new WebAppClassLoader(cdmWebappContext);

                String classPath = System.getProperty("java.class.path");

                classLoader.addClassPath(classPath);

                cdmWebappContext.setClassLoader(classLoader);

            }

            cdmWebappContext.addLifeCycleListener(new WebAppContextListener(cdmWebappContext));

            contexts.addHandler(cdmWebappContext);

            if(austostart){

                try {

                    conf.setStatus(CdmInstanceProperties.Status.starting);

                    cdmWebappContext.start();

                    if(!conf.getStatus().equals(Status.error)){

                        conf.setStatus(CdmInstanceProperties.Status.started);

                    }

                } catch (Exception e) {

                    logger.error("Could not start " + cdmWebappContext.getContextPath());

                    conf.setStatus(CdmInstanceProperties.Status.error);

                }

            }

        }

    }

    /**

     * @param context

     * @param webApplicationResource

     */

    private void setWebApp(WebAppContext context, File webApplicationResource) {

        if(webApplicationResource.isDirectory()){

            context.setResourceBase(webApplicationResource.getAbsolutePath());

            logger.debug("setting directory " + webApplicationResource.getAbsolutePath() + " as webapplication");

        } else {

            context.setWar(webApplicationResource.getAbsolutePath());

            logger.debug("setting war file " + webApplicationResource.getAbsolutePath() + " as webapplication");

        }

    }

    /**

     * @return

     */

    private boolean isRunningFromCdmRemoteWebAppSource() {

        String webappPathNormalized = cdmRemoteWebAppFile.getAbsolutePath().replace('\\', '/');

        return webappPathNormalized.endsWith("src/main/webapp") || webappPathNormalized.endsWith("cdmlib-remote-webapp/target/cdmserver");

    }

    /**

     * @param dataSourceName

     * @return

     */

    private CdmInstanceProperties findConfigAndStatusFor(String dataSourceName){

        for(CdmInstanceProperties props : configAndStatusSet){

            if(props.getDataSourceName().equals(dataSourceName)){

                return props;

            }

        }

        return null;

    }

    /**

     * @param <T>

     * @param webAppContext

     * @param attributeName

     * @param type

     * @return

     */

    @SuppressWarnings("unchecked")

    private <T> T getServletContextAttribute(WebAppContext webAppContext, String attributeName, Class<T> type) {

        Context servletContext = webAppContext.getServletContext();

        Object value = servletContext.getAttribute(attributeName);

        if( value != null && type.isAssignableFrom(value.getClass())){

        }

        return (T) value;

    }

    public Server getServer() {

        return server;

    }

}