DataNucleus AccessPlatform 3.2 Release Notes

The 3.2 release of AccessPlatform is available under the Apache 2 license from our download page

Version 3.2 includes the following over 3.1

  • The enhancer and ASM are now merged into <i>datanucleus-core</i>

  • L2 caching of embedded/serialised fields now defaults to ON

  • ExecutionContext objects are now pooled, together with various other improvements for performance

  • Enhancer now includes an option to enhance classes as <i>detachable</i> regardless of metadata

  • Neo4j : now uses a single connection per PM/EM

  • Neo4j : now supports bulk delete

  • MongoDB : now uses a single connection per PM/EM

  • MongoDB : now supports bulk delete

  • HBase : supports various extensions for bloom filters, compression, in-memory etc (Nicolas Seyvet)

  • HBase : now supports bulk delete

  • RDBMS : support added for the Virtuoso database (Emmanuel Poitier)

  • RDBMS : support added for Tomcat connection pool (Marshall Reeske)

  • OSGi : improved deployability due to dependency version restrictions

  • JPA : validated to work with JBoss 7 (thanks to Nicolas Seyvet and Scott Marlow)

  • JPA : access of non-detached field will result in IllegalAccessException instead of the previous JDO exception

  • JPA : support for JPA2.1 FROM "ON" clauses

  • JPA : support for bulk usage of persist(), remove(), merge() and detach() (pass in Collection or array of entities)

  • JPA : support for JPA2.1 "Generate Schema" feature

  • If a type is supported to be persistent then it defaults to persistent now (no need to mark all non-standard typed fields as persistent).

  • Add ability to disable the L2 cache on a PM/EM-basis where the PMF/EMF has it enabled.

  • Cache : provides support for <i>javax.cache</i> v0.61

  • Many bug fixes, and minor feature additions.


No further releases


DataNucleus AccessPlatform 3.2.9

Dec 10th 2013 : Version 3.2.9 includes the following changes

  • Wrap any exception thrown from JDOHelper.getObjectId so that it meets the JDO spec

  • Fix to class loading for property validators for OSGi

  • Couple of fixes for optimistic relationship management

  • JDO : Change PMF to be Serializable

  • RDBMS : Add support for bulk fetch of multi-valued collection fields of a candidate when in FetchPlan of a query (removes "1+N" problem)

  • RDBMS : Add support for SQLServer to handle JDOQL String.substring with 2 args (Daniel Dai)

  • RDBMS : Add support for JDOQL String.concat (Daniel Dai)

  • RDBMS : Fix to detection of type of backing store required for a collection, using metadata more

  • MongoDB : Add support for specifying the MongoOptions when creating the first connection (Robin Zhang)

  • Spatial : Fix some missing PostGIS methods

  • Some other bug fixes and minor improvements


DataNucleus AccessPlatform 3.2.8

Nov 19th 2013 : Version 3.2.8 includes the following changes

  • Metadata : Add level of locking to metadata load process to assist in multithreaded environments

  • Metadata : fix bug in OrderMetadata for multithreaded environments

  • Fix to some potential startup problems with ExecutionContext/ObjectProvider in multithreaded environments

  • Change "datanucleus.SerializeRead", "datanucleus.cache.collections", "datanucleus.deletionPolicy", "datanucleus.query.jdoql.allowAll", "datanucleus.query.sql.allowAll" to be overrideable on the PM/EM

  • Cache : update javax.cache support to "1.0-PFD" standard

  • RDBMS : Fix to persistence of bidirectional 1-N with Set<interface>

  • RDBMS : Change backing stores to be one per field and be thread-safe

  • RDBMS : Support for more boolean expressions in result clause for JDOQL/JPQL

  • RDBMS : Support for persisting a field serialised into a local file

  • RDBMS : Support for persisting a File type field streamed to/from datastore

  • RDBMS : Upgrade "datasource" plugin point to be "connectionpool", adding more capabilities

  • Neo4j : support for persistence of map fields (Map<PC,NonPC>, Map<NonPC, PC>)

  • Neo4j : support for using embedded database with user-provided configuration properties

  • Neo4j : support for access to underlying Cypher query for a JDOQL/JPQL query

  • MongoDB : support for query evaluation of several String methods in-datastore (Marcin Jurkowski)

  • MongoDB : support for query evaluation of Collection.contains in-datastore (Marcin Jurkowski)

  • MongoDB : fix to retrieval of class version field (Marcin Jurkowski)

  • MongoDB : support for query literals of type Character

  • Some other bug fixes and minor improvements


DataNucleus AccessPlatform 3.2.7

Oct 23rd 2013 : Version 3.2.7 includes the following changes

  • JPA : fix to metamodel SimpleAttributeImpl.isVersion (Adrian Ber)

  • JPA : add support for multi-field join syntax in JPQL FROM clause

  • JPA : update to handling of JPQL range when just first result set

  • RDBMS : fix for SQLServer schema name problem (Shanyu Zhao)

  • RDBMS : add support for using FetchPlan when querying over "complete-table" candidate (previous just retrieved primary key)

  • RDBMS : improvement in process to determine class name when no subclasses known about, to avoid SQL

  • RDBMS : support for persisting Double type into SQLServer FLOAT datastore type (Shuaishai Nie)

  • JSON : fix to retrieval of objects in query so that application-identity cases have id assigned

  • MongoDB : add support for query ordering being processed in the datastore (Marcin Jurkowski))

  • Rename "google-collections" plugin to "guava"

  • JDO : distribute jdo-api 3.1-rc1

  • Some other bug fixes and minor improvements


DataNucleus AccessPlatform 3.2.6

Aug 31st 2013 : Version 3.2.6 includes the following changes

  • L2 Cache : store class name of "id" of object to avoid some inheritance lookups

  • L2 Cache : allow configurable "update" mode

  • L2 Cache : cache copies of Date, Calendar when caching fields of those types

  • Update javax.cache support to v0.9

  • Add fallback method for getting types of a TypeConverter

  • Improvement to lookup of an object using class name from the identity where possible

  • Key FetchPlan for a class by the class name rather than by its metadata

  • JPA : fix support for Criteria function() method

  • RDBMS : support for querying ==/!= of String parameters

  • RDBMS : support query select of fetch plan fields of related N-1 FK field

  • RDBMS : support detection of discriminator in SQL query

  • HBase : improvement for primitive wrapper field types

  • Various other bug fixes and minor improvements


DataNucleus AccessPlatform 3.2.5

Aug 1st 2013 : Version 3.2.5 includes the following changes

  • Provide different ObjectProvider (StateManager) when using non-RDBMS datastores

  • Improve process of defining static query method support

  • In-memory querying : add support for String.charAt(int)

  • Upgrade javax.cache support to v0.8

  • MetaData : fix to merging of unmapped columns from ORM mapping file

  • RDBMS : add support for ordering with NULLS FIRST/NULLS LAST in JDOQL/JPQL

  • RDBMS : add support for use of startup load-scripts etc

  • RDBMS : fix to entrySet for FK Map where the key/value have inheritance

  • RDBMS : fix to handling of auto-apply of TypeConverter

  • MongoDB : fix to handling of version field under some circumstances

  • Spatial : various additions for use with PostGIS (Baris Ergun)

  • Various other bug fixes and minor improvements


DataNucleus AccessPlatform 3.2.4

Jun 27th 2013 : Version 3.2.4 includes the following changes

  • Drop support for DataNucleus extension @FetchGroup/@FetchPlan

  • Fix to attach process for SCO collections under some circumstances

  • Fix to L2 cache to not perform lookup if identity is for class that is not cacheable

  • Schema Generation : fix to case where using complete-table and version/discriminator not being added to subclasses

  • Fix to query caching to cater for FetchPlan being different on a query

  • Various other bug fixes and minor improvements


DataNucleus AccessPlatform 3.2.3

Jun 9th 2013 : Version 3.2.3 includes the following changes

  • Mapping : cater for inheritance with (multiple) MappedSuperclass part way down tree but with superclass Entity with own table (i.e effectively @MappedSubclass)

  • SchemaTool : support properties file and/or System props overriding persistence.xml

  • Simplify internal metadata storage for fetch groups and constraints

  • Rename "datanucleus.metadata.validate" persistence property to "datanucleus.metadata.xml.validate"

  • Add "datanucleus.metadata.xml.namespaceAware" to allow control over use of XML namespaces

  • Fix to operation queue for Map remove operations

  • Add check on specification of discriminator value for abstract classes

  • JPA : Support more <order-column> situations

  • RDBMS : Schema Generation improvement to better cater for any ordering of input classes

  • RDBMS : Schema Generation fix to recursive initialisation of PK of a table

  • RDBMS : Fix to handling of FK Map where key/value have inheritance and the value/key is stored in a superclass

  • RDBMS : Fix to value-map discriminator handling for embedded object

  • RDBMS : add ability to invoke any SQL function (for JPA 2.1)

  • MongoDB : fix to explicitly specify the storage type for primitive wrapper types

  • Various other bug fixes and minor improvements


DataNucleus AccessPlatform 3.2.2

May 14th 2013 : Version 3.2.2 includes the following changes

  • JPA : support for JPA2.1 EM.isJoinedToTransaction

  • JPA : support for JPA2.1 EMF.addNamedQuery

  • JDOQL : support more usages of DyadicExpression

  • Make operation queue more flexible so can contain any type of operation

  • Fix bug in operation queue optimisation

  • Add support for L2 cache storeMode/retrieveMode

  • Fix to bug with embedded 1-1 with no "embedded" block of mappings

  • Add support for specifying the ObjectProvider class name

  • Add optimisation to operation queue to detect Map put+remove of same key in succession

  • Fix JDOStateManager to throw API-specific exception rather than JDOException

  • RDBMS : fix to JDOQL getHour, getMinute, getSecond for SQLServer (Ivan Badia)

  • RDBMS : support evaluation of "(dyadicExpr).method()"

  • RDBMS : Fix to Map preDelete to better handle situation where a value was removed from the map before deletion

  • Spatial : fix to concurrency issue (Jan Heuer)

  • Move to release via Sonatype

  • Various other bug fixes and minor improvements


DataNucleus AccessPlatform 3.2.1

Apr 5th 2013 : Version 3.2.1 includes the following changes

  • Enhancer : important fix to detection of JDK1.6/1.7 so we add stackmap frames correctly

  • Fix to attach of elements of collection that aren’t yet persistent

  • Fix to attach process of marking of when an object is dirty

  • Fix to cascade-delete of embedded field

  • JDOQL : Support Date.getDate()

  • Add cached lookup mechanism for discriminator when using value-map

  • Default "datanucleus.attachSameDatastore" to true to match main use-cases

  • Move control over which FlushProcess to use to the datastore plugin (so they can optimise it)

  • JDO : support update of PM transaction properties through PM.setProperty

  • JDO : support validation of property values passed to PM.setProperty

  • JDO : return from PM.getProperties/getSupportedProperties uses correct case for names

  • JPA : fix to metamodel for whether a class was marked as MappedSuperclass or Entity

  • RDBMS : Change default for PreparedStatement pooling to false since DBCP is buggy

  • RDBMS : Fix to PostgreSQL bulk update syntax usage

  • RDBMS : Cater for ResultSet that returns column names with different case to the SQL statement

  • RDBMS : Set default for schema for sequence/sequence-table as that of the store manager

  • RDBMS : Fix bug in SQLAlphaTableNamer for case sensitivity

  • RDBMS : Support IDENTITY columns for VirtuosoDB (Emmanuel Poitier))

  • Neo4j : support embedded objects with reference to non-embedded objects

  • MongoDB : support embedded objects with reference to non-embedded objects

  • MongoDB : only apply a query to instantiable candidates

  • MongoDB : upgrade to mongo-java-driver v2.9+

  • Various other bug fixes and minor improvements


DataNucleus AccessPlatform 3.2.0.RELEASE

Mar 11th 2013 : Version 3.2 RELEASE includes the following changes

  • Fix to in-memory evaluation when using a variable that has no possible value

  • Move operation queue for SCOs to ExecutionContext so that it can control the whole flush process

  • Disable ObjectProvider pooling since it currently causes issues when in a highly multithreaded environment

  • Add check on attempted persistence of <i>final</i> fields

  • JPA : allow for user overriding a JNDI datasource with a URL-based datasource

  • RDBMS : fix to bulk update when setting fields to NULL

  • RDBMS : Cater for fields of a type that have a TypeConverter but no Mapping defined, falling back to the TypeConverter

  • Neo4j : Support for bulk delete

  • MongoDB : Support for bulk delete

  • HBase : Support for bulk delete


DataNucleus AccessPlatform 3.2.0.M4

Feb 20th 2013 : Version 3.2 Milestone 4 includes the following changes

  • Upgrade support for javax.cache to v0.61

  • Add support for javax.cache "readThrough", "writeThrough", "statisticsEnabled" and "storeByValue"

  • Fix bug where user had JPA inheritance tree with MappedSuperclass part way through tree and no discriminator value specified.

  • JDO : Fix to JDO PM.getProperties to present the properties in the case they are in the JDO spec.

  • Support disabling of L2 cache on a PM basis

  • Add synchronisation to evict method on query results cache

  • Much code refactoring around the enhancer and restricting JDO classes to just two places specific to the bytecode enhancement contract.

  • JPA : Support for JPA2.1 XSD (Proposed Final Draft (PFD))

  • JPA : Update support for "generate-schema" to match JPA2.1 PFD

  • JPA : Fix bug in XML <collection-table name=…​> processing

  • JPA : Add missing support for @MapKeyTemporal and associated XML variant.

  • JPA : Cater for missing @OneToOne on persistable field

  • JDO : Fix initialisation of a Localiser that caused problems in OSGi

  • RDBMS : Fix to NPE in UpdateRequest/DeleteRequest for corner-case version handling

  • RDBMS : Fix to not setting version when class was read in and has no DFG fields

  • RDBMS : Fix to bulk update for SQLServer

  • RDBMS : Support for Tomcat connection pool (Marshall Reeske)

  • RDBMS : Better control over how statements are logged

  • RDBMS : Fix bug in HAVING clause application

  • RDBMS : Omit class from discriminator restriction when class is abstract

  • Various minor bug fixes and improvements


DataNucleus AccessPlatform 3.2.0.M3

Feb 1st 2013 : Version 3.2 Milestone 3 includes the following changes

  • Introduction of a 2-phase flush process for corner cases that discover extra objects to be persisted during the first phase of flush

  • Support for JTA TransactionSynchronizationRegistry

  • Support for JTA transactions without auto-join

  • Fixes to JTA support for JBoss 7 (Nicolas Seyvet)

  • Fix to JDOQL bulk update bug

  • Various fixes to integration of Bean Validation

  • Support ability to precompile all named queries during PMF/EMF creation

  • Improvements to L2 cache update process to only update particular fields

  • Fix to XML auto-start mechanism to avoid duplicate entries

  • JPA2.1 : support for FROM "ON" clause

  • JPA : Support for multi-object usage of EntityManager persist(), merge(), remove() and detach() - vendor extension

  • JDO : Move JDO Typesafe classes to "datanucleus-api-jdo" plugin

  • RDBMS : Fix to getGeneratedKeys for MySQL (10-15% speed up for some cases)

  • RDBMS : Fix to pessimistic locking for SQLServer (Vladimir Konkov)

  • RDBMS : Improvements to bulk update to cope with inheritance and multiple tables

  • RDBMS : Improvements to bulk delete to cope with inheritance and multiple tables

  • RDBMS : Fix to query compilation caching to allow for serialize-read setting (Graham Stewart)

  • RDBMS : Support for Virtuoso database (Emmanuel Poitier)

  • RDBMS : Bug fix so that any HAVING clause is applied to all UNIONs

  • RDBMS : Change DB2 to use UNION ALL instead of UNION

  • HBase : fix to use of HTable (Nicolas Seyvet)

  • HBase : fix to extensions handling (Nicolas Seyvet)

  • Excel : allow connectionURL prefix of "xls" as alias for "excel"

  • MongoDB : fix to logger argument to be String

  • Various minor bug fixes and improvements


DataNucleus AccessPlatform 3.2.0.M2

Jan 1st 2013 : Version 3.2 Milestone 2 includes the following changes

  • JDO : ability to mark all classes as detachable, overriding metadata

  • JDO : add convenience accessor for "detachedState" of an object

  • JDO : provide access to the native query performed by JDOQL

  • JPA : add convenience accessor for "detachedState" of an object

  • JPA : provide access to the native query performed by JPQL

  • JPA : support surrogate version on a class

  • JPA : fix to exception throwing when using JTA in a JavaEE environment

  • JPA : support for JPA2.1 "Generate Schema" feature

  • JPA : improved logix for finding a persistence-unit with a name, and flag duplicate units with the same name

  • JPA : default to not add classTransformer in JavaEE environment (so user has to enable it)

  • Update to JMX beans definitions for compliance

  • Bundle (repackaged) ASM into <i>datanucleus-core</i> for cleaner usage

  • Fix missing "PreMainClass" for enhancer so runtime enhancement works

  • Moved "mapped datastores" code into RDBMS plugin (from datanucleus-core) since only used there

  • Add pooling for ExecutionContext and ObjectProvider objects for performance.

  • Fix to persist of N-1 relation with detached owner so we don’t get multiple element objects

  • Fix to ClassLoaderImpl/MetaDataUtils to preserve ordering whilst removing dups

  • RDBMS : fix to use of named parameters in range clause of query

  • RDBMS : add statement batching to shifting process for elements in a List

  • RDBMS : fix to schema generation when we have "subclass-table" part way down an inheritance tree

  • MongoDB : improvement for polymorphic queries to make use of discriminator column and handle all in single query

  • MongoDB : improvement to deletion process to not reload same fields multiple times

  • HBase : support for Bloom filters, in-memory and various other options (Nicolas Seyvet)

  • Excel : make "poi-ooxml" dependency optional since not needed with XLS

  • Various minor bug fixes and improvements


DataNucleus AccessPlatform 3.2.0.M1

Nov 24th 2012 : Version 3.2 Milestone 1 includes the following changes

  • OSGi : add version restrictions on many ImportPackage specifications to allow much improved deployability out-of-the-box.

  • Merge bytecode enhancer into <i>datanucleus-core</i>

  • Add option to enhance all classes in a directory and below

  • Clean up connection management so that when using Data Federation pooling is based on the ExecutionContext+Datastore and otherwise for the ExecutionContext

  • Attach/Detach : add logging of fields being attached/detached

  • L2 Cache : enable caching of embedded/serialised fields by default

  • L2 Cache : revised process for updating an object in the L2 cache to avoid concurrency

  • Clean up ExecutionContext/ObjectProvider contract, to allow for easier addition of alternate StateManagers for different use-cases.

  • Change all basic types to be default persistent (so the user doesn’t need to explicitly mark them as such), and update several to also be in the DFG

  • Change LinkedHashMap support to allow null values

  • Significant refactoring of internal DataNucleus classes (see this guide

  • JPA : Update enhancement contract to throw IllegalXXXException instead of JDOXXXException when some error condition occurs, for less JDO impact on JPA usage

  • JPA : various fixes to Criteria Query conversion to JPQL

  • JPA : add property to cater for J2EE servers that don’t respect JPA spec 3.11 EM.close contract

  • Neo4j : rewrite connection code to allow multithreaded, and use single connection per PM/EM

  • MongoDB : rewrite connection code to use single connection per PM/EM

  • MongoDB : use same connection for schema checks as for PM/EM

  • RDBMS : Allow SQL "CREATE" statements to be invoked

  • RDBMS : add lazy initialisation of secondary datasource (where possible)

  • RDBMS : clean up delete handling for some situations

  • RDBMS : add support for specifying indexes on map join tables

  • XML : clean up connection handling

  • Excel : clean up connection handling

  • ODF : clean up connection handling

  • LDAP : clean up connection handling

  • Spatial : add fix to bboxTest method for PostGIS

  • Various minor bug fixes and improvements