Hibernate SVN: r15187 -  core/branches/Br...

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Author: steve.ebersole@(protected)
Date: 2008-09-12 00:38:43 -0400 (Fri, 12 Sep 2008)
New Revision: 15187

Added:
core/branches/Branch_3_2/src/org/hibernate/cache/SingletonEhCacheProvider.java
Modified:
core/branches/Branch_3_2/src/org/hibernate/cache/EhCache.java
Log:
HHH-3450 : SingletonEhCacheProvider

Modified: core/branches/Branch_3_2/src/org/hibernate/cache/EhCache.java
===================================================================
--- core/branches/Branch_3_2/src/org/hibernate/cache/EhCache.java 2008-09-12 04:36:50 UTC (rev 15186)
+++ core/branches/Branch_3_2/src/org/hibernate/cache/EhCache.java 2008-09-12 04:38:43 UTC (rev 15187)
@@(protected) @@

private static final int SIXTY_THOUSAND_MS = 60000;

- private net.sf.ehcache.Cache cache;
+ private net.sf.ehcache.Ehcache cache;

/**
* Creates a new Hibernate pluggable cache based on a cache name.
@@(protected) @@
*
* @param cache The underlying EhCache instance to use.
*/
- public EhCache(net.sf.ehcache.Cache cache) {
+ public EhCache(net.sf.ehcache.Ehcache cache) {
this.cache = cache;
}

@@(protected) @@
return "EHCache(" + getRegionName() + ')';
}

-}
\ No newline at end of file
+}

Added: core/branches/Branch_3_2/src/org/hibernate/cache/SingletonEhCacheProvider.java
===================================================================
--- core/branches/Branch_3_2/src/org/hibernate/cache/SingletonEhCacheProvider.java (rev 0)
+++ core/branches/Branch_3_2/src/org/hibernate/cache/SingletonEhCacheProvider.java 2008-09-12 04:38:43 UTC (rev 15187)
@@(protected) @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
+ * indicated by the @author tags or express copyright attribution
+ * statements applied by the authors. All third-party contributions are
+ * distributed under license by Red Hat Middleware LLC.
+ *
+ * This copyrighted material is made available to anyone wishing to use, modify,
+ * copy, or redistribute it subject to the terms and conditions of the GNU
+ * Lesser General Public License, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this distribution; if not, write to:
+ * Free Software Foundation, Inc.
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02110-1301 USA
+ *
+ */
+package org.hibernate.cache;
+
+import net.sf.ehcache.CacheManager;
+import net.sf.ehcache.util.ClassLoaderUtil;
+
+import java.net.URL;
+import java.util.Properties;
+import java.util.logging.Logger;
+import java.util.logging.Level;
+
+/**
+ * Singleton cache Provider plugin for Hibernate 3.2 and ehcache-1.2. New in this provider is support for
+ * non Serializable keys and values. This provider works as a Singleton. No matter how many Hibernate Configurations
+ * you have, only one ehcache CacheManager is used. See EhCacheProvider for a non-singleton implementation.
+ * 
+ * Ehcache-1.2 also has many other features such as cluster support and listeners, which can be used seamlessly simply
+ * by configurion in ehcache.xml.
+ * 
+ * Use <code>hibernate.cache.provider_class=net.sf.ehcache.hibernate.SingletonEhCacheProvider</code> in the Hibernate configuration
+ * to enable this provider for Hibernate's second level cache.
+ * 
+ * Updated for ehcache-1.2. Note this provider requires ehcache-1.2.jar. Make sure ehcache-1.1.jar or earlier
+ * is not in the classpath or it will not work.
+ * 
+ * See http://ehcache.sf.net for documentation on ehcache
+ * 
+ *
+ * @author Greg Luck
+ * @author Emmanuel Bernard
+ * @version $Id: SingletonEhCacheProvider.java 744 2008-08-16 20:10:49Z gregluck $
+ */
+public final class SingletonEhCacheProvider implements CacheProvider {
+
+ /**
+ * The Hibernate system property specifying the location of the ehcache configuration file name.
+ * <p/
+ * If not set, ehcache.xml will be looked for in the root of the classpath.
+ * 
+ * If set to say ehcache-1.xml, ehcache-1.xml will be looked for in the root of the classpath.
+ */
+ public static final String NET_SF_EHCACHE_CONFIGURATION_RESOURCE_NAME = "net.sf.ehcache.configurationResourceName";
+
+ private static final Logger LOG = Logger.getLogger( SingletonEhCacheProvider.class.getName() );
+
+ /**
+ * To be backwardly compatible with a lot of Hibernate code out there, allow multiple starts and stops on the
+ * one singleton CacheManager. Keep a count of references to only stop on when only one reference is held.
+ */
+ private static int referenceCount;
+
+ private CacheManager manager;
+
+
+ /**
+ * Builds a Cache.
+ * 
+ * Even though this method provides properties, they are not used.
+ * Properties for EHCache are specified in the ehcache.xml file.
+ * Configuration will be read from ehcache.xml for a cache declaration
+ * where the name attribute matches the name parameter in this builder.
+ *
+ * @param name the name of the cache. Must match a cache configured in ehcache.xml
+ * @param properties not used
+ *
+ * @return a newly built cache will be built and initialised
+ *
+ * @throws org.hibernate.cache.CacheException
+ * inter alia, if a cache of the same name already exists
+ */
+ public final Cache buildCache(String name, Properties properties) throws CacheException {
+ try {
+ net.sf.ehcache.Ehcache cache = manager.getEhcache( name );
+ if ( cache == null ) {
+ SingletonEhCacheProvider.LOG.warning(
+ "Could not find a specific ehcache configuration for cache named ["
+ + name + "]; using defaults."
+ );
+ manager.addCache( name );
+ cache = manager.getEhcache( name );
+ SingletonEhCacheProvider.LOG.fine( "started EHCache region: " + name );
+ }
+ return new EhCache( cache );
+ }
+ catch ( net.sf.ehcache.CacheException e ) {
+ throw new CacheException( e );
+ }
+ }
+
+ /**
+ * Returns the next timestamp.
+ */
+ public final long nextTimestamp() {
+ return Timestamper.next();
+ }
+
+ /**
+ * Callback to perform any necessary initialization of the underlying cache implementation
+ * during SessionFactory construction.
+ * 
+ *
+ * @param properties current configuration settings.
+ */
+ public final void start(Properties properties) throws CacheException {
+ String configurationResourceName = null;
+ if ( properties != null ) {
+ configurationResourceName = ( String ) properties.get( NET_SF_EHCACHE_CONFIGURATION_RESOURCE_NAME );
+ }
+ if ( configurationResourceName == null || configurationResourceName.length() == 0 ) {
+ manager = CacheManager.create();
+ referenceCount++;
+ }
+ else {
+ if ( !configurationResourceName.startsWith( "/" ) ) {
+ configurationResourceName = "/" + configurationResourceName;
+ if ( LOG.isLoggable( Level.FINE ) ) {
+ LOG.fine(
+ "prepending / to " + configurationResourceName + ". It should be placed in the root"
+ + "of the classpath rather than in a package."
+ );
+ }
+ }
+ URL url = loadResource( configurationResourceName );
+ manager = CacheManager.create( url );
+ referenceCount++;
+ }
+ }
+
+ private URL loadResource(String configurationResourceName) {
+ ClassLoader standardClassloader = ClassLoaderUtil.getStandardClassLoader();
+ URL url = null;
+ if ( standardClassloader != null ) {
+ url = standardClassloader.getResource( configurationResourceName );
+ }
+ if ( url == null ) {
+ url = this.getClass().getResource( configurationResourceName );
+ }
+ if ( LOG.isLoggable( Level.FINE ) ) {
+ LOG.fine(
+ "Creating EhCacheProvider from a specified resource: "
+ + configurationResourceName + " Resolved to URL: " + url
+ );
+ }
+ if ( url == null ) {
+ if ( LOG.isLoggable( Level.WARNING ) ) {
+ LOG.warning(
+ "A configurationResourceName was set to " + configurationResourceName +
+ " but the resource could not be loaded from the classpath." +
+ "Ehcache will configure itself using defaults."
+ );
+ }
+ }
+ return url;
+ }
+
+ /**
+ * Callback to perform any necessary cleanup of the underlying cache implementation
+ * during SessionFactory.close().
+ */
+ public void stop() {
+ if ( manager != null ) {
+ referenceCount--;
+ if ( referenceCount == 0 ) {
+ manager.shutdown();
+ }
+ manager = null;
+ }
+ }
+
+ /**
+ * Not sure what this is supposed to do.
+ *
+ * @return false to be safe
+ */
+ public final boolean isMinimalPutsEnabledByDefault() {
+ return false;
+ }
+
+}

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[hibernate-commits] Hibernate SVN: r15187 - core/branches/Branch_3_2/src/org/hibernate/cache.

hibernate-commits

2008-09-12

[hibernate-commits] Hibernate SVN: r15187 -
core/branches/Branch_3_2/src/org/hibernate/cache.