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@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; ... }
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 |
---|
public abstract java.lang.String name
public abstract java.lang.String className
javax.sql.DataSource
or javax.sql.XADataSource
or javax.sql.ConnectionPoolDataSource
.
public abstract java.lang.String description
public abstract java.lang.String url
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.
public abstract java.lang.String user
public abstract java.lang.String password
public abstract java.lang.String databaseName
public abstract int portNumber
public abstract java.lang.String serverName
public abstract int isolationLevel
Default is vendor-specific.
public abstract boolean transactional
false
if connections should not participate
in transactions.
Default is to enlist in a transaction when one is active or becomes active.
public abstract int initialPoolSize
Default is vendor-specific
public abstract int maxPoolSize
Default is vendor-specific.
public abstract int minPoolSize
Default is vendor-specific.
public abstract int maxIdleTime
Default is vendor-specific
public abstract int maxStatements
Default is vendor-specific
public abstract java.lang.String[] properties
DataSource
properties such as:
Properties are specified using the format: propertyName=propertyValue with one property per array element.
public abstract int loginTimeout
Default is vendor-specific.
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Generated on 10-February-2011 12:41