About Hibernate
The hibernate3.jar contains all the core hibernate files. To use
Hibernate, it is required to create Java classes that represents
the table in the database and then map the instance variable in the
class with the columns in the database. Then Hibernate can be used
to perform operations on the database like select, insert, update
and delete the records in the table. Hibernate automatically
creates the query to perform these operations.
CLK application follows the following flow from user interface
to database.
JSP Page
Struts-config.xml
Action Class
Service Bean
Service Implementation
HibernatePersistenceManagerImpl
Database
The following are the three main elements of hibernate in CLK
application.
1. ServiceConfiguration_DEV_H9.xml
In the above configuration file we specified database connection
information, mapping resource detail, dialect property
(org.hibernate.dialect.DB2Dialect). The mapping resource property
is the mapping for the database table.
This attempts to load the env.properties file from the
classpath. This is an environment specific file that contains
property values that can be referenced here in this spring
configuration file.
classpath:/MAPQ.properties
classpath:/env.properties
Database connection detail
org.hibernate.dialect.DB2390Dialect
false
SH9DBC
org.hibernate.transaction.CMTTransactionFactory
org.hibernate.transaction.WebSphereExtendedJTATransactionLookup
This hibernate.dialect property indicates the particular SQL
variant that Hibernate generates.
The hibernate.show_sql option, if set to true will display all
the executed SQL queries on the console.
Mapping Resource property detail
com/td/bm/creditlink/domain/application/appraisal/sys/AppraisalContact.hbm.xml
Import the environment specific context file and resources
2. XXX.hbm.xml
This file is used to map class object to table object in the
database. In the mapping file, we need to add element that will map
the extra property to the database by specifying the column name.
In database, it will take an identifier of the parent to be
stored.
Example: AppraisalContact.hbm.xml
