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package eu.etaxonomy.cdm.cache;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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import java.lang.reflect.Field;
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import java.net.URISyntaxException;
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import java.net.URL;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Map;
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import org.hibernate.SessionFactory;
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import org.hibernate.boot.Metadata;
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import org.hibernate.boot.MetadataSources;
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import org.hibernate.boot.registry.StandardServiceRegistry;
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import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
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import org.hibernate.cfg.Configuration;
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import org.hibernate.mapping.PersistentClass;
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import org.hibernate.mapping.Property;
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import org.hibernate.metadata.ClassMetadata;
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import org.hibernate.property.access.spi.Getter;
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import net.sf.ehcache.Cache;
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import net.sf.ehcache.Element;
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/**
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* This class serializing and deserializing the CDM model for performance purposes.
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* To serialize it see the comments on {@link #main(String[])} and on
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* https://dev.e-taxonomy.eu/redmine/projects/edit/wiki/TaxonomicEditorDevelopersGuide#Model-Change-Actions
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*
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* @author c.mathew
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\* @since 2015
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*
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*/
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public class CdmModelCacher {
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public static String HB_CONFIG_FILE_PATH= "/eu/etaxonomy/cdm/mappings/hibernate.cfg.xml";
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public static final String CDM_MAP_SER_FILE = "cdm.map.ser";
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public static final String CDM_MAP_SER_FOLDER = "/eu/etaxonomy/cdm/mappings/";
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public static final String CDM_MAP_SER_FILE_PATH = CDM_MAP_SER_FOLDER + CDM_MAP_SER_FILE;
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public void cacheGetterFields(Cache cache) throws IOException, ClassNotFoundException, URISyntaxException {
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Map<String, CdmModelFieldPropertyFromClass> modelClassMap = loadModelClassMap();
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cache.removeAll();
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for(Map.Entry<String, CdmModelFieldPropertyFromClass> entry : modelClassMap.entrySet()) {
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cache.put(new Element(entry.getKey(), entry.getValue()));
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}
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}
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public Map<String, CdmModelFieldPropertyFromClass> loadModelClassMap() throws URISyntaxException, IOException, ClassNotFoundException {
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// ============== Eclpipse specific ============== //
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/*Bundle bundle = Platform.getBundle("eu.etaxonomy.taxeditor.cdmlib");
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URL modelMapFileBundleURL = bundle.getEntry(CDM_MAP_SER_FILE_PATH);
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URL modelMapFileURL = FileLocator.resolve(modelMapFileBundleURL);
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String modelMapFilePath = modelMapFileURL.getFile();
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FileInputStream fin = new FileInputStream(modelMapFilePath);
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*/
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InputStream fin = this.getClass().getResourceAsStream(CDM_MAP_SER_FILE_PATH);
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// ==============000000000000000 ============== //
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ObjectInputStream ois = new ObjectInputStream(fin);
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@SuppressWarnings("unchecked")
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Map<String, CdmModelFieldPropertyFromClass> modelClassMap = (Map<String, CdmModelFieldPropertyFromClass>) ois.readObject();
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ois.close();
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return modelClassMap;
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}
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public Map<String, CdmModelFieldPropertyFromClass> generateModelClassMap() {
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// A SessionFactory is set up once for an application!
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URL hibernateConfigFile = this.getClass().getResource(HB_CONFIG_FILE_PATH);
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final StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
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.configure(hibernateConfigFile) // configures settings from hibernate.cfg.xml
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.build();
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SessionFactory sessionFactory = null;
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Map<String, CdmModelFieldPropertyFromClass> modelClassMap = new HashMap<>();
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try {
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// ConnectionProvider connectionProvider = registry.getService(ConnectionProvider.class);
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// DatasourceConnectionProviderImpl providerImpl = registry.getService(DatasourceConnectionProviderImpl.class);
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Metadata metadata = new MetadataSources( registry ).buildMetadata();
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sessionFactory = metadata.buildSessionFactory();
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// Configuration configuration = buildConfiguration(HB_CONFIG_FILE_PATH);
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Map<String, ClassMetadata> classMetaDataMap = sessionFactory.getAllClassMetadata();
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// Metadata metadata = new MetadataSources( registry ).getMetadataBuilder().applyImplicitNamingStrategy( ImplicitNamingStrategyJpaCompliantImpl.INSTANCE ).build();
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for(ClassMetadata classMetaData :classMetaDataMap.values()) {
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Class<?> mappedClass = classMetaData.getMappedClass();
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String mappedClassName = mappedClass.getName();
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PersistentClass persistentClass =metadata.getEntityBinding(mappedClassName);
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CdmModelFieldPropertyFromClass cmgmfc = new CdmModelFieldPropertyFromClass(mappedClassName);
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System.out.println("Adding class : " + mappedClassName + " to cache");
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addGetters(persistentClass, cmgmfc);
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modelClassMap.put(mappedClassName, cmgmfc);
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}
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}
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catch (Exception e) {
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// The registry would be destroyed by the SessionFactory, but we had trouble building the SessionFactory
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// so destroy it manually.
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StandardServiceRegistryBuilder.destroy( registry );
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e.printStackTrace();
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}
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return modelClassMap;
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}
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public static Configuration buildConfiguration(String hibernateConfigFilePath) {
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Configuration configuration = new Configuration().configure(hibernateConfigFilePath);
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configuration.buildMappings();
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return configuration;
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}
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private void addGetters(PersistentClass persistentClass, CdmModelFieldPropertyFromClass cmgmfc) {
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if (persistentClass != null) {
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Iterator propertyIt = persistentClass.getPropertyIterator();
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while(propertyIt.hasNext())
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{
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Property property = (Property)propertyIt.next();
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Getter getter = property.getGetter(persistentClass.getMappedClass());
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if(getter != null && getter.getMember() != null) {
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Field field = (Field)getter.getMember();
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//logger.info(" - contains field '" + field.getName() + "' of type '" + field.getType().getName() + "'");
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cmgmfc.addGetMethods(field.getName());
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}
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}
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addGetters(persistentClass.getSuperclass(), cmgmfc);
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}
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}
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public static void main(String argv[]) {
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// To re-create the serialised cdm map run,
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// mvn exec:java -Dexec.mainClass="eu.etaxonomy.cdm.cache.CdmModelCacher"
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// in the eu.etaxonomy.taxeditor.cdmlib project root dir
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// See also https://dev.e-taxonomy.eu/redmine/projects/edit/wiki/TaxonomicEditorDevelopersGuide#Model-Change-Actions
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//Note AM: does not fully work for me, but running the main from the IDE works.
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CdmModelCacher cdmModelCacher = new CdmModelCacher();
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Map<String, CdmModelFieldPropertyFromClass> modelClassMap = cdmModelCacher.generateModelClassMap();
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try{
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if (!modelClassMap.isEmpty()){
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File outFile = new File("src/main/resources/" + CDM_MAP_SER_FILE_PATH);
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System.out.println("writing to " + outFile.getAbsolutePath());
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FileOutputStream fout = new FileOutputStream(outFile);
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ObjectOutputStream oos = new ObjectOutputStream(fout);
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oos.writeObject(modelClassMap);
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oos.close();
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System.out.println("CDM Map serialized");
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}else{
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String message = "CDM Map was empty. Model cache update NOT successful";
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System.out.println(message);
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}
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}catch(Exception ex){
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ex.printStackTrace();
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}
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}
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}
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