Java tutorial
/* * Copyright (c) 2006-2007 Massachusetts General Hospital * All rights reserved. This program and the accompanying materials * are made available under the terms of the i2b2 Software License v1.0 * which accompanies this distribution. * * Contributors: * Rajesh Kuttan */ package edu.harvard.i2b2.plugin.pb.util; import java.io.IOException; import java.sql.SQLException; import java.util.Properties; import javax.sql.DataSource; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.beans.factory.BeanFactory; import org.springframework.beans.factory.config.PropertiesFactoryBean; import org.springframework.context.support.FileSystemXmlApplicationContext; import org.springframework.core.io.FileSystemResource; import edu.harvard.i2b2.common.exception.I2B2Exception; import edu.harvard.i2b2.common.util.ServiceLocator; /** * This is the CRC application's main utility class This utility class provides * support for fetching resources like datasouce, to read application * properties, to get ejb home,etc. $Id: QueryProcessorUtil.java,v 1.7 * 2007/04/25 15:05:11 rk903 Exp $ * * @author rkuttan */ public class QueryProcessorUtil { /** log **/ protected final static Log log = LogFactory.getLog(QueryProcessorUtil.class); /** property file name which holds application directory name **/ public static final String APPLICATION_DIRECTORY_PROPERTIES_FILENAME = "patientcount_application_directory.properties"; /** application directory property name **/ public static final String APPLICATIONDIR_PROPERTIES = "edu.harvard.i2b2.crcplugin.pb.applicationdir"; /** application property filename* */ public static final String APPLICATION_PROPERTIES_FILENAME = "edu.harvard.i2b2.crcplugin.pb.properties"; public static final String APPLICATION_SPRINGCONTEXT_FILENAME_PROPERTIES = "edu.harvard.i2b2.crcplugin.pb.springcontext.filename"; /** property name for metadata schema name* */ private static final String DS_LOOKUP_DATASOURCE_PROPERTIES = "edu.harvard.i2b2.crcplugin.pb.ds.lookup.datasource"; /** property name for metadata schema name* */ private static final String DS_LOOKUP_SCHEMANAME_PROPERTIES = "edu.harvard.i2b2.crcplugin.pb.ds.lookup.schemaname"; /** property name for metadata schema name* */ private static final String DS_LOOKUP_SERVERTYPE_PROPERTIES = "edu.harvard.i2b2.crcplugin.pb.ds.lookup.servertype"; private static final String ONTOLOGYCELL_ROOT_WS_URL_PROPERTIES = "edu.harvard.i2b2.crcplugin.pb.delegate.ontology.url"; private static final String ONTOLOGYCELL_GETTERMINFO_URL_PROPERTIES = "edu.harvard.i2b2.crcplugin.pb.delegate.ontology.operation.getterminfo"; private static final String ONTOLOGYCELL_GETCHILDREN_URL_PROPERTIES = "edu.harvard.i2b2.crplugin.pb.delegate.ontology.operation.getchildren"; /** property name for pm url schema name **/ private static final String PMCELL_WS_URL_PROPERTIES = "edu.harvard.i2b2.crcplugin.pb.ws.pm.url"; /** class instance field* */ private static QueryProcessorUtil thisInstance = null; /** service locator field* */ private static ServiceLocator serviceLocator = null; /** field to store application properties * */ private static Properties appProperties = null; private static Properties loadProperties = null; /** field to store app datasource* */ private DataSource dataSource = null; /** single instance of spring bean factory* */ private BeanFactory beanFactory = null; /** * Private constructor to make the class singleton */ private QueryProcessorUtil() { } static { try { Class.forName("oracle.jdbc.OracleDriver"); } catch (ClassNotFoundException e) { log.error(e); } } /** * Return this class instance * * @return QueryProcessorUtil */ public static QueryProcessorUtil getInstance() { if (thisInstance == null) { thisInstance = new QueryProcessorUtil(); serviceLocator = ServiceLocator.getInstance(); } // start cron job // startCronJob(); return thisInstance; } /** * Function to create spring bean factory * * @return BeanFactory */ public BeanFactory getSpringBeanFactory() { if (beanFactory == null) { String appDir = null; try { // read application directory property file via classpath loadProperties = ServiceLocator.getProperties(APPLICATION_DIRECTORY_PROPERTIES_FILENAME); // read directory property appDir = loadProperties.getProperty(APPLICATIONDIR_PROPERTIES); } catch (I2B2Exception e) { log.error(APPLICATION_DIRECTORY_PROPERTIES_FILENAME + "could not be located from classpath "); } String springContextFileName = loadProperties .getProperty(APPLICATION_SPRINGCONTEXT_FILENAME_PROPERTIES); if (appDir != null) { FileSystemXmlApplicationContext ctx = new FileSystemXmlApplicationContext( "file:" + appDir + "/" + springContextFileName); beanFactory = ctx.getBeanFactory(); } else { FileSystemXmlApplicationContext ctx = new FileSystemXmlApplicationContext( "classpath:" + springContextFileName); beanFactory = ctx.getBeanFactory(); } } return beanFactory; } public String getCRCDBLookupDataSource() throws I2B2Exception { return getPropertyValue(DS_LOOKUP_DATASOURCE_PROPERTIES); } public String getCRCDBLookupServerType() throws I2B2Exception { return getPropertyValue(DS_LOOKUP_SERVERTYPE_PROPERTIES); } public String getCRCDBLookupSchemaName() throws I2B2Exception { return getPropertyValue(DS_LOOKUP_SCHEMANAME_PROPERTIES); } public String getOntologyUrl() throws I2B2Exception { return getPropertyValue(ONTOLOGYCELL_ROOT_WS_URL_PROPERTIES); } public String getProjectManagementCellUrl() throws I2B2Exception { return getPropertyValue(PMCELL_WS_URL_PROPERTIES); } /** * Return app server datasource * * @return datasource * @throws I2B2Exception * @throws SQLException */ public DataSource getSpringDataSource(String dataSourceName) throws I2B2Exception { DataSource dataSource = (DataSource) getSpringBeanFactory().getBean(dataSourceName); return dataSource; } public String getCRCPropertyValue(String propertyName) throws I2B2Exception { return getPropertyValue(propertyName); } // --------------------- // private methods here // --------------------- /** * Load application property file into memory */ private String getPropertyValue(String propertyName) throws I2B2Exception { if (appProperties == null) { // read application directory property file loadProperties = ServiceLocator.getProperties(APPLICATION_DIRECTORY_PROPERTIES_FILENAME); // read application directory property String appDir = loadProperties.getProperty(APPLICATIONDIR_PROPERTIES); if (appDir == null) { throw new I2B2Exception("Could not find " + APPLICATIONDIR_PROPERTIES + "from " + APPLICATION_DIRECTORY_PROPERTIES_FILENAME); } String appPropertyFile = appDir + "/" + APPLICATION_PROPERTIES_FILENAME; try { FileSystemResource fileSystemResource = new FileSystemResource(appPropertyFile); PropertiesFactoryBean pfb = new PropertiesFactoryBean(); pfb.setLocation(fileSystemResource); pfb.afterPropertiesSet(); appProperties = (Properties) pfb.getObject(); } catch (IOException e) { throw new I2B2Exception("Application property file(" + appPropertyFile + ") missing entries or not loaded properly"); } if (appProperties == null) { throw new I2B2Exception("Application property file(" + appPropertyFile + ") missing entries or not loaded properly"); } } String propertyValue = appProperties.getProperty(propertyName); if ((propertyValue != null) && (propertyValue.trim().length() > 0)) { ; } else { throw new I2B2Exception("Application property file(" + APPLICATION_PROPERTIES_FILENAME + ") missing " + propertyName + " entry"); } return propertyValue; } }