PowerPoint Presentation
Hibernate 3.1Siddhanta Kumar PattnaikCopyright 2012 Manhattan
Associates, Incorporated. Strictly Confidential. Not for
Distribution.1AgendaJDBC OverviewFeatures of Hibernate Core Objects
Of HibernateHibernate Associations MappingHibernate Object
stateHibernate Connection ManagementHibernate Transaction
ManagementHibernate Cache implementationCaching Concurrency
StrategyHibernate Query LanguageHibernate Interceptors and
Events
2Copyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution.2JDBC OverviewConnection
con=null;try{//load the driverClass.forName(OracleDriver);//create
the
Connectioncon=DriverManger.getConnection(url,un,pw);con.setAutoCommit(false);//create
the statementStatement
st=con.createStatement();st.executeQuery(select * from
);con.commit;}catch{con.rollback();}finally{con.close();}
3Copyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution.Features of Hibernate Hibernate
is responsible for establish the connection, creating statement
,preparing sql statement required and cleaning the
resource.Hibernate supports two types of connection 1)DriverManager
2)Data Source connection .Hibernate support two types of
transaction 1)JDBC 2)JTA Transaction Hibernate support various
types of mappings .Hibernate support powerful Object Oriented Query
Language .
4Copyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution.Features of Hibernate Hibernate
supports various Caching Technique . Default support for batch
updates .Hibernate can run in CME and non CME Env .Hibernate
supports various types of primary key generation algorithm
.Hibernate support Lazy loading .
5Copyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution. Core objects of
hibernateConfiguration(org.hibernate.cfg.Configuration)
SessionFactory (org.hibernate.SessionFactory)Immutable objectThread
safe Single instance per database Session
(org.hibernate.Session)Single unit of work Not thread safe
Transaction (org.hibernate.Transaction)
6Copyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution.Object StateTransientObject
instantiated with new operator and is not associated with a
hibernate session.PersistentHas a representation in the database.
Can be a object just has been saved or loaded from db.DetachedAn
object that has been persistent and a valid reference exists for it
outside the scope of its session.7Copyright 2012 Manhattan
Associates, Incorporated. Strictly Confidential. Not for
Distribution.Hibernate Association MappingsHibernate support
following Association Mapping .OneToOneOneToManyManyToMany
8Copyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution.One To One
Mapping9EMP_IDEMP_NAMESALARY1Sateesh1000002Harish150000SAL_ACC_IDEMP_ID1122EmployeeSalary_AccountCopyright
2012 Manhattan Associates, Incorporated. Strictly Confidential. Not
for Distribution.One To Many
Mapping10EMP_IDEMP_NAMESALARY1Sateesh1000002Hrish150000AIDSTREETEMP_ID113th
Phase1214th cross132nd cross1EmployeeAddressCopyright 2012
Manhattan Associates, Incorporated. Strictly Confidential. Not for
Distribution.Many To Many
Mapping11EMP_IDEMP_NAMESALARY1Sateesh1000002Harish150000AIDSTREET113th
Phase214th cross32nd
crossEmployeeAddressEMP_ADD_EMP_IDEMP_ADD_AID11121323EMP_ADDCopyright
2012 Manhattan Associates, Incorporated. Strictly Confidential. Not
for Distribution.Hibernate Connection ManagementHibernate support
following Connection Provider .DriverManagerConnectionProviderC3P0
Connection ProviderDataSource Connection Provider Custom Connection
Provider
12Copyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution.Hibernate Connection
ManagementDriverManager Coonection ProviderBydefault Hibernate use
this connection provider and this is not good for production .C3P0
Connection ProviderIt is a third party connection pooling algorithm
.To use this we need to add specific property in hibernate
configuration file .< property
name=connection.provider_class>.. C3P0ConnectionProvider
10201
13Copyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution.Hibernate Connection
ManagementDataSource Coonection ProviderTo use this connection
provider our hibernate application must run inside some application
server . Data source connection will automatically participate in
JTA transaction .we need to add some specific property for this in
hibernate cfg file .Custom Connection
ProviderCustomConnectionProvider
14Copyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution.Hibernate Transaction
ManagementTransaction is the process of performing multiple
database operation as a single unit with all nothing criteria
.Transaction must support ACID property
.A-AtomicityC-ConsistencyI-IsolationD-Durability
15Copyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution.15Hibernate Transaction
ManagementHibernate support two types of transaction 1)JDBC 2)JTA
TransactionJDBCTransactionBy default Hibernate use JDBC Transaction
internally .To use JDBC transaction connection must be
DriverManager or C3P0 .JTA Transaction To use JTA transaction we
must use Data source connection .
MYSQLDataSourceorg.hibernate.transaction.JTATransactionFactory>
16Copyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution.Hibernate Transaction
Management.. JBossTransactionManagerLookup.class
Jta/UserTransaction jta
17Copyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution.Hibernate Cache
ImplementationCache is a presentation of database near to
application .when we implement caching it will increase the
performance .we have three types of cache scope .Transactional
Scope cache
18Application DBTX1TX2CacheCacheCopyright 2012 Manhattan
Associates, Incorporated. Strictly Confidential. Not for
Distribution.Hibernate Cache ImplementationProcess Scope
cache19Application DBTX1TX2CacheCopyright 2012 Manhattan
Associates, Incorporated. Strictly Confidential. Not for
Distribution.Hibernate Cache ImplementationClustered Scope
cache
20Load Balancing ServerApplication TX1TX2cacheDBApplication
TX1TX1cacheJBOSS Instance 1JBOSS Instance 2JVM 1JVM 2Copyright 2012
Manhattan Associates, Incorporated. Strictly Confidential. Not for
Distribution.Hibernate Cache ArchitectureFirst Level CacheSession
Cache is the first level Cache .Second Level cache or Query Cache
Query cache can be process scope or cluster scope .To enable query
cache we need to add some property .true..EhCacheProvider
21Copyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution.Cache Provider Supported by
Hibernate22Cache Provider classTypeCluster SafeQuery
CacheENVHashtableorg.hibernate.cache.HashtableCacheProviderMemoryNoYesCME
and
nonCMEEHCacheorg.hibernate.cache.EhCacheProviderMemory,DiskNoYesCME
and nonCMEOSCacheorg.hibernate.cache.OSCacheProviderMemory,Disk
NoyesCME and nonCME
SwarmCache
org.hibernate.cache.SwarmCacheProviderclusteredYesNoCME and
nonCMETreeCacheorg.hibernate.cache.TreeCacheProviderclusteredYesyesCME
onlyCopyright 2012 Manhattan Associates, Incorporated. Strictly
Confidential. Not for Distribution.Cache Concurrency strategiesA
concurrency strategy is a mediator which responsible for storing
items of data in the cache and retrieving them from the
cache.Read-only: A concurrency strategy suitable for data which
never changes.Nonstrict-read-write: This strategy makes no
guarantee of consistency between the cache and the database.
Read-write: The READ-WRITE strategy works well for data that
changes and must be committed.Transactional: The TRANSACTIONAL
strategy is intended for use in an environment utilizing the Java
Transaction API (JTA) to manage transactions across a number of XA
resources. This strategy guarantees that a cache remains in sync
with other resources, such as databases and queues .23Copyright
2012 Manhattan Associates, Incorporated. Strictly Confidential. Not
for Distribution.Cache Concurrency Strategy
Support24Cacheread-onlynonstrict-read-writeread-writetransactionalHashtableYesYesYesEHCacheYesYesYesOSCacheYesYesYesSwarmCacheYesYesTreecacheYesYesCopyright
2012 Manhattan Associates, Incorporated. Strictly Confidential. Not
for Distribution.Hibernate Query LanguageHibernate support various
types of Object Oriented Query Language .HQL(Hibernate Query
Language)QBC(Query By Criteria)Native Query25Copyright 2012
Manhattan Associates, Incorporated. Strictly Confidential. Not for
Distribution.Hibernate Interceptors and
EventsInterceptorsInterceptors provides a call back method from
session to application ,allowling the application to intercept and
manupulate the properties of persistence object before its saved,
updated or loaded .Two kinds of interceptors ->SessionScope-
Applied to pertucular session Session ses=sf.openSession(new
Myinterceptors());->SessionFactory-Applied to all session
created from session factory .newConfiguration().setInterceptor(new
Myinterceptors());26Copyright 2012 Manhattan Associates,
Incorporated. Strictly Confidential. Not for Distribution.Hibernate
Interceptors and EventsEventsIf we have to react to particular
events in your persistence layer, you can also use the Hibernate3
event architecture. The event system can be used in addition, or as
a replacement, for interceptors. All the methods of the Session
interface correlate to an event. > LoadEvent, >
FlushEvent> etc.27Copyright 2012 Manhattan Associates,
Incorporated. Strictly Confidential. Not for Distribution.Hibernate
Interceptors and EventsEvent Listener Implements the appropriate
interface for the event it wants to process and/or extend one of
the convenience base classes
public class MyLoadListener implements LoadEventListener {//
this is the single method defined by the LoadEventListener
interfacepublic void onLoad(LoadEvent event,
LoadEventListener.LoadType loadType) throws HibernateException {if
( !MySecurity.isAuthorized( event.getEntityClassName(),
event.getEntityId() ) ) {throw MySecurityException("Unauthorized
access");}}}28Copyright 2012 Manhattan Associates, Incorporated.
Strictly Confidential. Not for Distribution.Question?Copyright 2012
Manhattan Associates, Incorporated. Strictly Confidential. Not for
Distribution.29
