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Contents
- Configuration
- Configurable items
- Configuration definition
The configurable items must be returned from the methods of the implementation class ofthe org.seasar.doma.jdbc.Config
interface.
Return a JDBC DataSource
from the getDataSource
method.If you need local transactions provided by Doma, return a LocalTransactionDataSource
.
See also: Transaction
Return a DataSource’s name from the getDataSourceName
method.In the environment where multiple DataSources are used, the name is important.You have to give an unique name to each DataSource.
The default value is the full qualified name of the implementation class of Config
.
Return a Dialect
from the getDialect
method.You have to choose an appropriate dialect for the database you use.
Doma provides following dialects:
Database | Dialect Name | Description |
---|---|---|
DB2 | Db2Dialect | |
H2 Database Engine 1.2.126 | H212126Dialect | H2 Database Engine 1.2.126 |
H2 Database | H2Dialect | H2 Database Engine 1.3.171 and above |
HSQLDB | HsqldbDialect | |
Microsoft SQL Server 2008 | Mssql2008Dialect | Microsoft SQL Server 2008 |
Microsoft SQL Server | MssqlDialect | Microsoft SQL Server 2012 and above |
MySQL | MySqlDialect | |
Oracle Database 11g | Oracle11Dialect | Oracle Database 11g |
Oracle Database | OracleDialect | Oracle Database 12g and above |
PostgreSQL | PostgresDialect | |
SQLite | SqliteDialect |
These dialect are located in the org.seasar.doma.jdbc.dialect
package.
Return a JdbcLogger
from the getJdbcLogger
method.
Doma provides following JdbcLogger:
- org.seasar.doma.jdbc.UtilLoggingJdbcLogger
The default JdbcLogger is UtilLoggingJdbcLogger which uses java.util.logging
.
Return a SqlFileRepository
from the getSqlFileRepository
method.
Doma provides following SqlFileRepositories:
- org.seasar.doma.jdbc.GreedyCacheSqlFileRepository
- org.seasar.doma.jdbc.NoCacheSqlFileRepository
The default SqlFileRepository is GreedyCacheSqlFileRepositorywhich caches the result of SQL parsing without limitation.
Return a RequiresNewController
from the getRequiresNewController
method.RequiresNewController may begin new transactions to makes transaction locked time shorter.
This feature is used only when you use @TableGenerator
which generates identities with the table.
The default RequiresNewController does nothing.
Return a ClassHelper
from the getClassHelper
method.
When the application server and framework you use loads classes with their specific way,consider to create your own ClassHelper.
The default ClassHelper loads classes with Class#forName
mainly.
Return a SqlLogType
from the getExceptionSqlLogType
.The default SqlLogType contains the formatted SQL in exception messages.
Return a UnknownColumnHandler
from the getUnknownColumnHandler
method.In result set mappings, if an unknown column to an entity class is found,the UnknownColumnHandler handles the situation.
The default UnknownColumnHandler throws an UnknownColumnException
.
Return a Naming
from the getNaming
method.The naming element of @Entity
have preference over this value.When you specify explicit value to the name elements of @Table
and @Column
,the naming convention is not applied to them.
The default Naming does nothing.
Return a MapKeyNaming
from the getMapKeyNaming
method.The MapKeyNaming is used when the result set is mapped to java.util.Map<String,Object>
.
The default MapKeyNaming does nothing.
Return a LocalTransactionManager
from the getTransactionManager
method.The getTransactionManager
method throws UnsupportedOperationException
as default.
See also: Transaction
Return a Commenter
from the getCommenter
method.
Doma provides following commenter:
- org.seasar.doma.jdbc.CallerCommenter
The default Commenter does nothing.
Return a CommandImplementors
from the getCommandImplementors
method.For example, the CommandImplementors provides you a hook to execute JDBC API.
Return a QueryImplementors
from the getQueryImplementors
method.For example, the QueryImplementors provides you a hook to rewrite SQL statements.
Return the query timeout (second) from the getQueryTimeout
method.This value is used as default in Queries.
Return the max rows from the getMaxRows
method.This value is used as default in Search.
Return the fetch size from the getFetchSize
method.This value is used as default in Search.
Return the batch size from the getBatchSize
method.This value is used as default in Batch insert,Batch update and Batch delete.
Return a EntityListenerProvider
from the getEntityListenerProvider
method.When you want to get entity listeners from a dependency injection container,create your own EntityListenerProvider.
The default EntityListenerProvider get the entity listener from the accepted supplier.
All JDBC drivers are loaded automatically by the service provider mechanism.
Warning
But in the specific environment, the mechanism doesn’t work appropriately.For example, when you use Apache Tomcat, you will find the case.See also: DriverManager, the service provider mechanism and memory leaks
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The simple definition is appropriate in following cases:
- The configuration instance isn’t managed in the dependency injection container
- Local transactions is used
You can use the above DbConfig
class as follows:
The above EmployeeDao
interface must be annotated with the @Dao
annotation as follows:
The advanced definition is appropriate in following cases:
- The configuration instance is managed as a singleton object in the dependency injection container
- The transaction manager is provided from the application server or framework you use
Suppose the dialect
and the dataSource
are injected by the dependency injection container:
To inject the instance of the above class to your DAO implementation instance,you have to annotate your DAO interfaces with @AnnotateWith
:
To avoid annotating your DAO interfaces with @AnnotateWith
repeatedly,annotate the arbitrary annotation with it only once:
Then, you can annotate your DAO interfaces with the above @InjectConfig
annotation:
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