javax.annotation.sql
Annotation Type DataSourceDefinition


@Target(value=TYPE)
@Retention(value=RUNTIME)
public @interface DataSourceDefinition

Annotation used to define a container DataSource and be registered with JNDI. The DataSource may be configured by setting the annotation elements for commonly used DataSource properties. Additional standard and vendor-specific properties may be specified using the properties element.

The data source will be registered under the name specified in the name element. It may be defined to be in any valid Java EE namespace, and will determine the accessibility of the data source from other components.

A JDBC driver implementation class of the appropriate type, either DataSource, ConnectionPoolDataSource, or XADataSource, must be indicated by the className element. The availability of the driver class will be assumed at runtime.

The url property should not be specified in conjunction with other standard properties for defining the connectivity to the database. If the url property is specified along with other standard DataSource properties such as serverName and portNumber, the more specific properties will take precedence and url will be ignored.

Vendors are not required to support properties that do not normally apply to a specific data source type. For example, specifying the transactional property to be true but supplying a value for className that implements a data source class other than XADataSource may not be supported.

Vendor-specific properties may be combined with or used to override standard data source properties defined using this annotation.

DataSource properties that are specified and are not supported in a given configuration or cannot be mapped to a vendor specific configuration property may be ignored.

Examples:

   @DataSourceDefinition(name="java:global/MyApp/MyDataSource",
      className="com.foobar.MyDataSource",
      portNumber=6689,
      serverName="myserver.com",
      user="lance",
      password="secret"
   )
 
 

Using a URL:

  @DataSourceDefinition(name="java:global/MyApp/MyDataSource",
    className="org.apache.derby.jdbc.ClientDataSource",
    url="jdbc:derby://localhost:1527/myDB",
    user="lance",
    password="secret"
 )
 

An example lookup of the DataSource from an EJB:

 @Stateless
 public class MyStatelessEJB {
   @Resource(lookup="java:global/MyApp/myDataSource")
    DataSource myDB;
      ...
 }
 

Since:
Common Annotations 1.1
See Also:
DataSource, XADataSource, ConnectionPoolDataSource

Required Element Summary
 java.lang.String className
          DataSource implementation class name which implements: javax.sql.DataSource or javax.sql.XADataSource or javax.sql.ConnectionPoolDataSource.
 java.lang.String name
          JNDI name by which the data source will be registered.
 
Optional Element Summary
 java.lang.String databaseName
          Name of a database on a server.
 java.lang.String description
          Description of this data source
 int initialPoolSize
          Number of connections that should be created when a connection pool is initialized.
 int isolationLevel
          Isolation level for connections.
 int loginTimeout
          Sets the maximum time in seconds that this data source will wait while attempting to connect to a database.
 int maxIdleTime
          The number of seconds that a physical connection should remain unused in the pool before the connection is closed for a connection pool.
 int maxPoolSize
          Maximum number of connections that should be concurrently allocated for a connection pool.
 int maxStatements
          The total number of statements that a connection pool should keep open.
 int minPoolSize
          Minimum number of connections that should be allocated for a connection pool.
 java.lang.String password
          Password to use for connection authentication.
 int portNumber
          Port number where a server is listening for requests.
 java.lang.String[] properties
          Used to specify Vendor specific properties and less commonly used DataSource properties such as:
 java.lang.String serverName
          Database server name.
 boolean transactional
          Set to false if connections should not participate in transactions.
 java.lang.String url
          A JDBC URL.
 java.lang.String user
          User name to use for connection authentication.
 

Element Detail

name

public abstract java.lang.String name
JNDI name by which the data source will be registered.

Since:
1.1

className

public abstract java.lang.String className
DataSource implementation class name which implements: javax.sql.DataSource or javax.sql.XADataSource or javax.sql.ConnectionPoolDataSource.

Since:
1.1

description

public abstract java.lang.String description
Description of this data source

Since:
1.1
Default:
""

url

public abstract java.lang.String url
A JDBC URL. If the url property is specified along with other standard DataSource properties such as serverName and portNumber, the more specific properties will take precedence and url will be ignored.

Since:
1.1
Default:
""

user

public abstract java.lang.String user
User name to use for connection authentication.

Since:
1.1
Default:
""

password

public abstract java.lang.String password
Password to use for connection authentication.

Since:
1.1
Default:
""

databaseName

public abstract java.lang.String databaseName
Name of a database on a server.

Since:
1.1
Default:
""

portNumber

public abstract int portNumber
Port number where a server is listening for requests.

Since:
1.1
Default:
-1

serverName

public abstract java.lang.String serverName
Database server name.

Since:
1.1
Default:
"localhost"

isolationLevel

public abstract int isolationLevel
Isolation level for connections. The Isolation level must be one of the following:

Default is vendor-specific.

Since:
1.1
Default:
-1

transactional

public abstract boolean transactional
Set to false if connections should not participate in transactions.

Default is to enlist in a transaction when one is active or becomes active.

Since:
1.1
Default:
true

initialPoolSize

public abstract int initialPoolSize
Number of connections that should be created when a connection pool is initialized.

Default is vendor-specific

Since:
1.1
Default:
-1

maxPoolSize

public abstract int maxPoolSize
Maximum number of connections that should be concurrently allocated for a connection pool.

Default is vendor-specific.

Since:
1.1
Default:
-1

minPoolSize

public abstract int minPoolSize
Minimum number of connections that should be allocated for a connection pool.

Default is vendor-specific.

Since:
1.1
Default:
-1

maxIdleTime

public abstract int maxIdleTime
The number of seconds that a physical connection should remain unused in the pool before the connection is closed for a connection pool.

Default is vendor-specific

Since:
1.1
Default:
-1

maxStatements

public abstract int maxStatements
The total number of statements that a connection pool should keep open. A value of 0 indicates that the caching of statements is disabled for a connection pool.

Default is vendor-specific

Since:
1.1
Default:
-1

properties

public abstract java.lang.String[] properties
Used to specify Vendor specific properties and less commonly used DataSource properties such as:

Properties are specified using the format: propertyName=propertyValue with one property per array element.

Since:
1.1
Default:
{}

loginTimeout

public abstract int loginTimeout
Sets the maximum time in seconds that this data source will wait while attempting to connect to a database. A value of zero specifies that the timeout is the default system timeout if there is one; otherwise, it specifies that there is no timeout.

Default is vendor-specific.

Since:
1.1
Default:
0


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Generated on 10-February-2011 12:41


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