From 1c0d27a1d5da91019ed2f51d4184282ea7ffe4f0 Mon Sep 17 00:00:00 2001 From: Thomas Lenz Date: Fri, 7 Jun 2013 11:50:13 +0200 Subject: Common classes for Hibernate initializing and database handling --- .../gv/egovernment/moa/id/commons/db/DBUtils.java | 33 +++++ .../moa/id/commons/db/HibernateUtil.java | 159 +++++++++++++++++++++ .../moa/id/commons/db/dao/AssertionStore.java | 74 ++++++++++ .../moa/id/commons/db/ex/MOADatabaseException.java | 22 +++ 4 files changed, 288 insertions(+) create mode 100644 id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/DBUtils.java create mode 100644 id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/HibernateUtil.java create mode 100644 id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/dao/AssertionStore.java create mode 100644 id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/ex/MOADatabaseException.java (limited to 'id/server/moa-id-commons/src/main/java') diff --git a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/DBUtils.java b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/DBUtils.java new file mode 100644 index 000000000..aab0b281d --- /dev/null +++ b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/DBUtils.java @@ -0,0 +1,33 @@ +package at.gv.egovernment.moa.id.commons.db; + +import java.util.List; + +import org.hibernate.Query; +import org.hibernate.Session; + +import at.gv.egovernment.moa.id.commons.db.dao.AssertionStore; +import at.gv.egovernment.moa.logging.Logger; +import at.gv.egovernment.moa.util.MiscUtil; + +public class DBUtils { + + @SuppressWarnings("rawtypes") + public static AssertionStore getAssertion(String artifact) { + MiscUtil.assertNotNull(artifact, "artifact"); + Logger.trace("Getting Assertion with Artifact " + artifact + " from database."); + + Session session = HibernateUtil.getCurrentSession(); + session.beginTransaction(); + Query query = session.getNamedQuery("getAssertionWithArtifact"); + query.setString("artifact", artifact); + List result = query.list(); + Logger.trace("Found entries: " + result.size()); + + if (result.size() == 0) { + Logger.trace("No entries found."); + return null; + } + return (AssertionStore) result.get(0); + } + +} diff --git a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/HibernateUtil.java b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/HibernateUtil.java new file mode 100644 index 000000000..59398c922 --- /dev/null +++ b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/HibernateUtil.java @@ -0,0 +1,159 @@ +package at.gv.egovernment.moa.id.commons.db; + +import java.util.Properties; + +import org.apache.commons.lang3.StringUtils; +import org.hibernate.HibernateException; +import org.hibernate.Session; +import org.hibernate.SessionFactory; +import org.hibernate.Transaction; +import org.hibernate.cfg.Configuration; +import org.hibernate.service.ServiceRegistry; +import org.hibernate.service.ServiceRegistryBuilder; + +import at.gv.egovernment.moa.id.commons.db.ex.MOADatabaseException; +import at.gv.egovernment.moa.logging.Logger; + +public final class HibernateUtil { + + private static SessionFactory sessionFactory; + private static ServiceRegistry serviceRegistry; + + @SuppressWarnings("rawtypes") + private static final ThreadLocal THREAD_LOCAL = new ThreadLocal(); + private static boolean automaticSessionHandling = false; + + private static final String[] AUTOMATIC_SESSION_HANDLING_VALUES = new String[] { "jta", "thread" }; + private static final String SESSION_HANDLING_KEY = "hibernate.current_session_context_class"; + + private static Configuration configuration; + + protected HibernateUtil() { } + + public static void initHibernate(Configuration config, Properties hibernateProperties) { + + String scm = StringUtils.trimToNull(hibernateProperties.getProperty(SESSION_HANDLING_KEY)); + if (scm != null) { + automaticSessionHandling = scm.indexOf(AUTOMATIC_SESSION_HANDLING_VALUES[0]) != -1 || scm.indexOf(AUTOMATIC_SESSION_HANDLING_VALUES[1]) != -1; + } + Logger.debug("Evaluating hibernate property \"" + SESSION_HANDLING_KEY + "\"."); + if (automaticSessionHandling) { + Logger.info("Hibernate is automatically handling session context management."); + } else { + Logger.info("Hibernate is NOT automatically handling session context management. Using build-in ThreadLocal session handling."); + } + try { + //Create the SessionFactory + Logger.debug("Creating initial session factory..."); + + config.configure(); + serviceRegistry = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry(); + sessionFactory = config.buildSessionFactory(serviceRegistry); + Logger.debug("Initial session factory successfully created."); + + } catch (Throwable ex) { + Logger.error("Initial session factory creation failed: " + ex.getMessage()); + throw new ExceptionInInitializerError(ex); + } + } + + /** + * Checks if a session factory is currently available. If necessary a new + * session factory is created. + * + * @return current (or new) session factory + * @throws HibernateException + * thrown if a hibernate error occurs + */ + public static Session getCurrentSession() { + if (automaticSessionHandling) { + return sessionFactory.getCurrentSession(); + } + Session session = (Session) THREAD_LOCAL.get(); + // Open a new Session, if this Thread has none yet + if (session == null || !session.isConnected()) { + session = getNewSession(); + } + return session; + } + + @SuppressWarnings("unchecked") + public static Session getNewSession() { + if (automaticSessionHandling) { + Logger.warn("Session is being automatically handled by hibernate. Therefore this session maybe not being newly created. Use HibernateUtil.getCurrentSession() instead."); + return sessionFactory.getCurrentSession(); + } + Session session = (Session) THREAD_LOCAL.get(); + if (session != null) { + Logger.warn("Previous session has not been closed; closing session now."); + closeSession(); + } + Logger.debug("Opening new hibernate session..."); + try { + session = sessionFactory.openSession(); + THREAD_LOCAL.set(session); + } catch (HibernateException hex) { + Logger.error(hex.getMessage()); + } + return session; + } + + /** + * Closes the current session. + * + * @throws HibernateException + * thrown if session is already closed or a hibernate error + * occurs. + */ + @SuppressWarnings("unchecked") + public static void closeSession() { + if (automaticSessionHandling) { + Logger.warn("Session is being automatically handled by hibernate. Therefore the current session cannot be closed on demand."); + return; + } + Logger.debug("Closing current hibernate session..."); + Session session = (Session) THREAD_LOCAL.get(); + THREAD_LOCAL.set(null); + if (session != null) { + try { + session.close(); + + } catch (HibernateException hex) { + Logger.error(hex.getMessage()); + } + } + } + + public static boolean saveOrUpdate(Object dbo) throws MOADatabaseException { + Transaction tx = null; + try { + Session session = HibernateUtil.getCurrentSession(); + tx = session.beginTransaction(); + session.saveOrUpdate(dbo); + tx.commit(); + return true; + + } catch(HibernateException e) { + Logger.warn("Error during database saveOrUpdate. Rollback.", e); + tx.rollback(); + throw new MOADatabaseException(e); + } + } + + public static boolean delete(Object dbo) { + Transaction tx = null; + try { + Session session = HibernateUtil.getCurrentSession(); + tx = session.beginTransaction(); + session.delete(dbo); + tx.commit(); + return true; + + } catch(HibernateException e) { + Logger.warn("Error during database delete. Rollback.", e); + tx.rollback(); + return false; + } + } + +} diff --git a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/dao/AssertionStore.java b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/dao/AssertionStore.java new file mode 100644 index 000000000..9dff193d6 --- /dev/null +++ b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/dao/AssertionStore.java @@ -0,0 +1,74 @@ +package at.gv.egovernment.moa.id.commons.db.dao; + +import java.io.Serializable; +import java.util.Date; + +import javax.persistence.Column; +import javax.persistence.Entity; +import javax.persistence.Id; +import javax.persistence.Lob; +import javax.persistence.Table; + +import org.hibernate.annotations.DynamicUpdate; +import org.hibernate.annotations.NamedQueries; +import org.hibernate.annotations.NamedQuery; + + +@Entity +@DynamicUpdate(value=true) +@Table(name = "assertionstore") +@NamedQueries({ + @NamedQuery(name="getAssertionWithArtifact", query = "select assertionstore from AssertionStore assertionstore where assertionstore.artifact = :artifact") +}) + +public class AssertionStore implements Serializable{ + + private static final long serialVersionUID = 1L; + + @Id + @Column(name = "artifact", unique=true, nullable=false) + private String artifact; + + @Column(name = "type", nullable=false) + private String type; + + @Column(name = "assertion", nullable=false) + @Lob private byte [] assertion; + + @Column(name = "datetime", nullable=false) + Date datatime; + + public String getArtifact() { + return artifact; + } + + public void setArtifact(String artifact) { + this.artifact = artifact; + } + + public String getType() { + return type; + } + + public void setType(String type) { + this.type = type; + } + + public byte[] getAssertion() { + return assertion; + } + + public void setAssertion(byte[] assertion) { + this.assertion = assertion; + } + + public Date getDatatime() { + return datatime; + } + + public void setDatatime(Date datatime) { + this.datatime = datatime; + } + + +} diff --git a/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/ex/MOADatabaseException.java b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/ex/MOADatabaseException.java new file mode 100644 index 000000000..169d31aac --- /dev/null +++ b/id/server/moa-id-commons/src/main/java/at/gv/egovernment/moa/id/commons/db/ex/MOADatabaseException.java @@ -0,0 +1,22 @@ +package at.gv.egovernment.moa.id.commons.db.ex; + +public class MOADatabaseException extends Exception { + + private static final long serialVersionUID = 1L; + + public MOADatabaseException() { + super(); + } + + public MOADatabaseException(String message, Throwable cause) { + super(message, cause); + } + + public MOADatabaseException(String message) { + super(message); + } + + public MOADatabaseException(Throwable cause) { + super(cause); + } +} -- cgit v1.2.3