org.broadleafcommerce.common.extensibility.jpa.convert

Class MaterializedClobTypeClassTransformer

java.lang.Object

org.broadleafcommerce.common.extensibility.jpa.convert.MaterializedClobTypeClassTransformer

All Implemented Interfaces:

javax.persistence.spi.ClassTransformer, BroadleafClassTransformer

public class MaterializedClobTypeClassTransformer
extends Object
implements BroadleafClassTransformer

Broadleaf defines the Hibernate type for Clob fields as StringClobType. This has been deprecated in favor of MaterializedClobType. However, this is not a panacea, as this can map to the wrong type for Postgres. However, this mapping is correct for Oracle.

The main reason to switch to MaterializedClobType is because it avoids the use of rs.getCharacterStream on the clob column. Opening the character stream causes the Oracle jdbc driver to allocate a very large buffer array, which contributes to wasteful short-term memory allocation.

Add this class transformer to any implementation by adding it to the blMergedClassTransformers list in app context:

 
 <bean id="myMaterializedClobTypeClassTransfomer" class="org.broadleafcommerce.common.extensibility.jpa.convert.MaterializedClobTypeClassTransformer"/>
 <bean id="myClassTransformers" class="org.springframework.beans.factory.config.ListFactoryBean">
     <property name="sourceList">
         <list>
             <ref bean="myMaterializedClobTypeClassTransfomer"/>
         </list>
     </property>
 </bean>
 <bean class="org.broadleafcommerce.common.extensibility.context.merge.LateStageMergeBeanPostProcessor">
     <property name="collectionRef" value="myClassTransformers" />
     <property name="targetRef" value="blMergedClassTransformers" />
 </bean>
 
 

Author:

Jeff Fischer

Field Summary

Fields

Modifier and Type	Field and Description
protected List<DirectCopyIgnorePattern>	ignorePatterns

Constructor Summary

Constructors

Constructor and Description
MaterializedClobTypeClassTransformer()

Method Summary

Modifier and Type	Method and Description
void	compileJPAProperties(Properties properties, Object o)
protected boolean	containsTypeLevelPersistenceAnnotation(javassist.bytecode.annotation.Annotation[] annotations)
protected boolean	isIgnored(String convertedClassName)
byte[]	transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ignorePatterns

protected List<DirectCopyIgnorePattern> ignorePatterns

Constructor Detail

MaterializedClobTypeClassTransformer

public MaterializedClobTypeClassTransformer()

Method Detail

compileJPAProperties

public void compileJPAProperties(Properties properties,
                                 Object o)
                          throws Exception

Specified by:

compileJPAProperties in interface BroadleafClassTransformer

Throws:

Exception

transform

public byte[] transform(ClassLoader loader,
                        String className,
                        Class<?> classBeingRedefined,
                        ProtectionDomain protectionDomain,
                        byte[] classfileBuffer)
                 throws IllegalClassFormatException

Specified by:

transform in interface javax.persistence.spi.ClassTransformer

Throws:

IllegalClassFormatException

isIgnored

protected boolean isIgnored(String convertedClassName)

containsTypeLevelPersistenceAnnotation

protected boolean containsTypeLevelPersistenceAnnotation(javassist.bytecode.annotation.Annotation[] annotations)