DataSource (JBoss J2EE API) - JBoss 4.0.1 sp1 j2ee API Documentation 英文版文档
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javax.sql
Interface DataSource
- public interface DataSource
A DataSource object is a factory for Connection objects. An object that implements the DataSource interface will typically be registered with a JNDI service provider. A JDBC driver that is accessed via the DataSource API does not automatically register itself with the DriverManager.
| Method Summary | |
Connection |
getConnection()
Attempt to establish a database connection. |
Connection |
getConnection(String user,
String password)
Attempt to establish a database connection. |
int |
getLoginTimeout()
Gets the maximum time in seconds that this data source can wait while attempting to connect to a database. |
PrintWriter |
getLogWriter()
Get the log writer for this data source. |
void |
setLoginTimeout(int seconds)
Sets the maximum time in seconds that this data source will wait while attempting to connect to a database. |
void |
setLogWriter(PrintWriter printWriter)
Set the log writer for this data source. |
| Method Detail |
getConnection
public Connection getConnection() throws SQLException
- Attempt to establish a database connection.
- Returns:
- a Connection to the database
- Throws:
SQLException- - if a database-access error occurs.
getConnection
public Connection getConnection(String user, String password) throws SQLException
- Attempt to establish a database connection.
- Parameters:
user- - the database user on whose behalf the Connection is being madepassword- - the user's password- Returns:
- a Connection to the database
- Throws:
SQLException- - if a database-access error occurs.
getLogWriter
public PrintWriter getLogWriter() throws SQLException
Get the log writer for this data source.
The log writer is a character output stream to which all logging and tracing messages for this data source object instance will be printed. This includes messages printed by the methods of this object, messages printed by methods of other objects manufactured by this object, and so on. Messages printed to a data source specific log writer are not printed to the log writer associated with the java.sql.Drivermanager class. When a DataSource object is created the log writer is initially null, in other words, logging is disabled.
- Returns:
- the log writer for this data source, null if disabled
- Throws:
SQLException- - if a database-access error occurs.
getLoginTimeout
public int getLoginTimeout()
throws SQLException
- Gets the maximum time in seconds that this data source can wait while attempting to connect to a database.
A value of zero means that the timeout is the default system timeout if there is one; otherwise it means that
there is no timeout. When a DataSource object is created the login timeout is initially zero.
- Returns:
- the data source login time limit
- Throws:
SQLException- - if a database access error occurs.
setLogWriter
public void setLogWriter(PrintWriter printWriter) throws SQLException
Set the log writer for this data source.
The log writer is a character output stream to which all logging and tracing messages for this data source object instance will be printed. This includes messages printed by the methods of this object, messages printed by methods of other objects manufactured by this object, and so on. Messages printed to a data source specific log writer are not printed to the log writer associated with the java.sql.Drivermanager class. When a DataSource object is created the log writer is initially null, in other words, logging is disabled.
- Parameters:
printWriter- - the new log writer; to disable, set to null- Throws:
SQLException- - if a database-access error occurs.
setLoginTimeout
public void setLoginTimeout(int seconds)
throws SQLException
- 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. When a DataSource object is created the login timeout is initially zero.
- Parameters:
seconds- - the data source login time limit- Throws:
SQLException- - if a database access error occurs.
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