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Java Source Code / Java Documentation » J2EE » spring framework 2.5 » org.springframework.jdbc.datasource

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

org.springframework.jdbc.datasource .DelegatingDataSource

org.springframework.jdbc.datasource .UserCredentialsDataSourceAdapter

org.springframework.jdbc.datasource .IsolationLevelDataSourceAdapter

All known Subclasses:   org.springframework.jdbc.datasource .WebSphereDataSourceAdapter,
IsolationLevelDataSourceAdapter
public class IsolationLevelDataSourceAdapter extends UserCredentialsDataSourceAdapter (Code)
An adapter for a target javax.sql.DataSource , applying the current Spring transaction's isolation level (and potentially specified user credentials) to every getConnection call. Also applies the read-only flag, if specified.
Can be used to proxy a target JNDI DataSource that does not have the desired isolation level (and user credentials) configured. Client code can work with this DataSource as usual, not worrying about such settings.
Inherits the capability to apply specific user credentials from its superclass UserCredentialsDataSourceAdapter ; see the latter's javadoc for details on that functionality (e.g. IsolationLevelDataSourceAdapter.setCredentialsForCurrentThread ).
WARNING: This adapter simply calls java.sql.Connection.setTransactionIsolation and/or java.sql.Connection.setReadOnly for every Connection obtained from it. It does, however, not reset those settings; it rather expects the target DataSource to perform such resetting as part of its connection pool handling. Make sure that the target DataSource properly cleans up such transaction state.
author:
   Juergen Hoeller
since:
   2.0.3
See Also:   IsolationLevelDataSourceAdapter.setIsolationLevel
See Also:   IsolationLevelDataSourceAdapter.setIsolationLevelName
See Also:   IsolationLevelDataSourceAdapter.setUsername
See Also:   IsolationLevelDataSourceAdapter.setPassword

Method Summary
protected Connection doGetConnection(String username, String password)
     Applies the current isolation level value and read-only flag to the returned Connection.
protected Integer getCurrentIsolationLevel()
     Determine the current isolation level: either the transaction's isolation level or a statically defined isolation level.
protected Boolean getCurrentReadOnlyFlag()
     Determine the current read-only flag: by default, the transaction's read-only hint.
protected Integer getIsolationLevel()
     Return the statically specified isolation level, or null if none.
public void setIsolationLevel(int isolationLevel)
     Specify the default isolation level to use for Connection retrieval, according to the JDBC java.sql.Connection constants (equivalent to the corresponding Spring org.springframework.transaction.TransactionDefinition constants).
final public void setIsolationLevelName(String constantName)
     Set the default isolation level by the name of the corresponding constant in org.springframework.transaction.TransactionDefinition , e.g.

Method Detail
doGetConnection
protected Connection doGetConnection(String username, String password) throws SQLException(Code)
Applies the current isolation level value and read-only flag to the returned Connection.
See Also:   IsolationLevelDataSourceAdapter.getCurrentIsolationLevel()
See Also:   IsolationLevelDataSourceAdapter.getCurrentReadOnlyFlag()

getCurrentIsolationLevel
protected Integer getCurrentIsolationLevel()(Code)
Determine the current isolation level: either the transaction's isolation level or a statically defined isolation level. the current isolation level, or null if none
See Also:   org.springframework.transaction.support.TransactionSynchronizationManager.getCurrentTransactionIsolationLevel
See Also:   IsolationLevelDataSourceAdapter.setIsolationLevel

getCurrentReadOnlyFlag
protected Boolean getCurrentReadOnlyFlag()(Code)
Determine the current read-only flag: by default, the transaction's read-only hint. whether there is a read-only hint for the current scope
See Also:   org.springframework.transaction.support.TransactionSynchronizationManager.isCurrentTransactionReadOnly

getIsolationLevel
protected Integer getIsolationLevel()(Code)
Return the statically specified isolation level, or null if none.

setIsolationLevel
public void setIsolationLevel(int isolationLevel)(Code)
Specify the default isolation level to use for Connection retrieval, according to the JDBC java.sql.Connection constants (equivalent to the corresponding Spring org.springframework.transaction.TransactionDefinition constants).
If not specified, the target DataSource's default will be used. Note that a transaction-specific isolation value will always override any isolation setting specified at the DataSource level.
See Also:   java.sql.Connection.TRANSACTION_READ_UNCOMMITTED
See Also:   java.sql.Connection.TRANSACTION_READ_COMMITTED
See Also:   java.sql.Connection.TRANSACTION_REPEATABLE_READ
See Also:   java.sql.Connection.TRANSACTION_SERIALIZABLE
See Also:   org.springframework.transaction.TransactionDefinition.ISOLATION_READ_UNCOMMITTED
See Also:   org.springframework.transaction.TransactionDefinition.ISOLATION_READ_COMMITTED
See Also:   org.springframework.transaction.TransactionDefinition.ISOLATION_REPEATABLE_READ
See Also:   org.springframework.transaction.TransactionDefinition.ISOLATION_SERIALIZABLE
See Also:   org.springframework.transaction.TransactionDefinition.getIsolationLevel
See Also:   org.springframework.transaction.support.TransactionSynchronizationManager.getCurrentTransactionIsolationLevel

setIsolationLevelName
final public void setIsolationLevelName(String constantName) throws IllegalArgumentException(Code)
Set the default isolation level by the name of the corresponding constant in org.springframework.transaction.TransactionDefinition , e.g. "ISOLATION_SERIALIZABLE".
If not specified, the target DataSource's default will be used. Note that a transaction-specific isolation value will always override any isolation setting specified at the DataSource level.
Parameters:
  constantName - name of the constant
See Also:   org.springframework.transaction.TransactionDefinition.ISOLATION_READ_UNCOMMITTED
See Also:   org.springframework.transaction.TransactionDefinition.ISOLATION_READ_COMMITTED
See Also:   org.springframework.transaction.TransactionDefinition.ISOLATION_REPEATABLE_READ
See Also:   org.springframework.transaction.TransactionDefinition.ISOLATION_SERIALIZABLE
See Also:   IsolationLevelDataSourceAdapter.setIsolationLevel

Methods inherited from org.springframework.jdbc.datasource.UserCredentialsDataSourceAdapter
protected Connection doGetConnection(String username, String password) throws SQLException(Code)(Java Doc)
public Connection getConnection() throws SQLException(Code)(Java Doc)
public Connection getConnection(String username, String password) throws SQLException(Code)(Java Doc)
public void removeCredentialsFromCurrentThread()(Code)(Java Doc)
public void setCredentialsForCurrentThread(String username, String password)(Code)(Java Doc)
public void setPassword(String password)(Code)(Java Doc)
public void setUsername(String username)(Code)(Java Doc)

Methods inherited from org.springframework.jdbc.datasource.DelegatingDataSource
public void afterPropertiesSet()(Code)(Java Doc)
public Connection getConnection() throws SQLException(Code)(Java Doc)
public Connection getConnection(String username, String password) throws SQLException(Code)(Java Doc)
public PrintWriter getLogWriter() throws SQLException(Code)(Java Doc)
public int getLoginTimeout() throws SQLException(Code)(Java Doc)
public DataSource getTargetDataSource()(Code)(Java Doc)
public boolean isWrapperFor(Class iface) throws SQLException(Code)(Java Doc)
public void setLogWriter(PrintWriter out) throws SQLException(Code)(Java Doc)
public void setLoginTimeout(int seconds) throws SQLException(Code)(Java Doc)
final public void setTargetDataSource(DataSource targetDataSource)(Code)(Java Doc)
public Object unwrap(Class iface) throws SQLException(Code)(Java Doc)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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