Metacat

import edu.ucsb.nceas.metacat.common.query.EnabledQueryEngines;

import java.io.File;

import javax.servlet.ServletConfig;

import javax.servlet.ServletException;

import org.apache.commons.configuration.ConfigurationException;

import org.dataone.configuration.Settings;

import org.dataone.service.exceptions.ServiceFailure;

import com.hazelcast.client.HazelcastClient;

    private String metacatPropertiesFile = null;

    private static int waitingTime = IndexGenerator.WAITTIME;

    private static int maxAttempts = IndexGenerator.MAXWAITNUMBER;

    /*public ApplicationController () throws Exception {

    }*/

     * Set the Spring configuration file and metacat.properties file

     * @param metacatPropertyFile  the path of the metacat.properties file

    public ApplicationController(String springConfigFile, String metacatPropertiesFile) throws Exception {

        this.metacatPropertiesFile = metacatPropertiesFile;

        //init();

     * Loads the metacat.prioerties into D1 Settings utility

     * this gives us access to all metacat properties as well as 

     * overriding any properties as needed. 

     * Note: in the junit test, we are using the test.properties rather than this properties file.

     * 

     * Makes sure shared Hazelcast configuration file location is set

     */

    private void initializeSharedConfiguration() {

        int times = 0;

        while(true) {

            File metacatProperties = new File(metacatPropertiesFile);

            if(metacatProperties.exists()) {

                break;

            } else {

                try {

                        Thread.sleep(waitingTime);

                } catch (InterruptedException e) {

                            // TODO Auto-generated catch block

                        e.printStackTrace();

                }

            }

            times++;

            if(times >= maxAttempts) {

                log.error("ApplicationController.initialzeSharedConfiguration - MetacatIndex wait a while and still can't find the metacat.properties file.");

                break;//we still break the while loop and continue. But the properties in the metacat.properties can't be read.

            }

        }

        try {

            Settings.getConfiguration();

            Settings.augmentConfiguration(metacatPropertiesFile);

        } catch (ConfigurationException e) {

            log.error("Could not initialize shared Metacat properties. " + e.getMessage(), e);

        }

        // make sure hazelcast configuration is defined so that

        String hzConfigFileName = Settings.getConfiguration().getString("dataone.hazelcast.configFilePath");

        if (hzConfigFileName == null) {

            // use default metacat hazelcast.xml file in metacat deployment

            hzConfigFileName = 

                    Settings.getConfiguration().getString("application.deployDir") +

                    "/" +

                    Settings.getConfiguration().getString("application.context") + 

                    "/WEB-INF/hazelcast.xml";

            // set it for other parts of the code

            Settings.getConfiguration().setProperty("dataone.hazelcast.configFilePath", hzConfigFileName);

            //set data.hazelcast.location.clientconfig. This property will be used in d1_cn_index_processor module.

            //if we don't set this property, d1_cn_index_processor will use the default location /etc/dataone/storage.

            Settings.getConfiguration().setProperty("dataone.hazelcast.location.clientconfig", hzConfigFileName);

        }

    }

    /**

    public void initialize() throws Exception {

     * Start the system metadata listener. Prior to call this method, we should call

     * initialize method first.

     * It will initialize the shared metacat.properties and the SolrIndex, then start system metadata event listener and 

     *  generate indexes for those haven't been indexed in another thread. This method is for the MetacatIndexServlet.

     *  The reason we put those methods (init, startSysmetaListener, startIndex)in the run (another thread) is that the waiting readiness of the metacat wouldn't 

     *  block the start of the servlet container (e.g., tomcat).

        initializeSharedConfiguration();

        try {

            boolean isSolrEnabled = true;

            try {

               isSolrEnabled = EnabledQueryEngines.getInstance().isEnabled(EnabledQueryEngines.SOLRENGINE);

            } catch (Exception e) {

                log.error("ApplicationController.run - Metacat-index can't read the enabled query engine list from metacat.properties :"+e.getMessage());

            }

            //if the solr query engine is disabled, we stop here.

            if(!isSolrEnabled) {

                return;

            }

            initialize();

            startSysmetaListener();

            startIndex();//it will create another thread.

        } catch (Exception e) {

            log.error("Application.run "+e.getMessage());

        }

    	//initializeSharedConfiguration(config);

        //find the sibling metacat.properties file

        String metacatPropertiesFilePath = config.getServletContext().getInitParameter("metacat.properties.path");

        File contextDeploymentDir = new File(config.getServletContext().getRealPath("/"));

        String fullMetacatPropertiesFilePath = contextDeploymentDir.getParent()  + metacatPropertiesFilePath;

        //ApplicationController controller = null;

             ApplicationController controller = new ApplicationController(FILEPREFIX + url.getFile(), fullMetacatPropertiesFilePath);

             //Start the controller in other thread - SystemmetadataEventListener and to generate indexes for those haven't been indexed in another thread

             Thread controllerThread = new Thread(controller);

             controllerThread.start();

    /*private void initializeSharedConfiguration(ServletConfig config) {

    }*/