org.apache.commons.dbcp2.managed

Class ManagedConnection<C extends java.sql.Connection>

java.lang.Object

org.apache.commons.dbcp2.AbandonedTrace

org.apache.commons.dbcp2.DelegatingConnection<C>

org.apache.commons.dbcp2.managed.ManagedConnection<C>

Type Parameters:

C - the Connection type

All Implemented Interfaces:

java.lang.AutoCloseable, java.sql.Connection, java.sql.Wrapper, org.apache.commons.pool2.TrackedUse

public class ManagedConnection<C extends java.sql.Connection>
extends DelegatingConnection<C>

ManagedConnection is responsible for managing a database connection in a transactional environment (typically called "Container Managed"). A managed connection operates like any other connection when no global transaction (a.k.a. XA transaction or JTA Transaction) is in progress. When a global transaction is active a single physical connection to the database is used by all ManagedConnections accessed in the scope of the transaction. Connection sharing means that all data access during a transaction has a consistent view of the database. When the global transaction is committed or rolled back the enlisted connections are committed or rolled back. Typically upon transaction completion, a connection returns to the auto commit setting in effect before being enlisted in the transaction, but some vendors do not properly implement this. When enlisted in a transaction the setAutoCommit(), commit(), rollback(), and setReadOnly() methods throw a SQLException. This is necessary to assure that the transaction completes as a single unit.

Since:

2.0

Version:

$Id: ManagedConnection.java 1658616 2015-02-10 02:49:54Z psteitz $

Author:

Dain Sundstrom

Field Summary

Fields inherited from interface java.sql.Connection

TRANSACTION_NONE, TRANSACTION_READ_COMMITTED, TRANSACTION_READ_UNCOMMITTED, TRANSACTION_REPEATABLE_READ, TRANSACTION_SERIALIZABLE

Constructor Summary

Constructors

Constructor and Description
ManagedConnection(org.apache.commons.pool2.ObjectPool<C> pool, TransactionRegistry transactionRegistry, boolean accessToUnderlyingConnectionAllowed)

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closes the underlying connection, and close any Statements that were not explicitly closed.
void	commit()
C	getDelegate() Returns my underlying Connection.
java.sql.Connection	getInnermostDelegate() If my underlying Connection is not a DelegatingConnection, returns it, otherwise recursively invokes this method on my delegate.
boolean	isAccessToUnderlyingConnectionAllowed() If false, getDelegate() and getInnermostDelegate() will return null.
void	rollback()
void	setAutoCommit(boolean autoCommit)
void	setReadOnly(boolean readOnly)

Methods inherited from class org.apache.commons.dbcp2.DelegatingConnection

abort, clearCachedState, clearWarnings, createArrayOf, createBlob, createClob, createNClob, createSQLXML, createStatement, createStatement, createStatement, createStruct, getAutoCommit, getCacheState, getCatalog, getClientInfo, getClientInfo, getDefaultQueryTimeout, getHoldability, getInnermostDelegateInternal, getMetaData, getNetworkTimeout, getSchema, getTransactionIsolation, getTypeMap, getWarnings, innermostDelegateEquals, isClosed, isReadOnly, isValid, isWrapperFor, nativeSQL, prepareCall, prepareCall, prepareCall, prepareStatement, prepareStatement, prepareStatement, prepareStatement, prepareStatement, prepareStatement, releaseSavepoint, rollback, setCacheState, setCatalog, setClientInfo, setClientInfo, setDefaultQueryTimeout, setDelegate, setHoldability, setNetworkTimeout, setSavepoint, setSavepoint, setSchema, setTransactionIsolation, setTypeMap, toString, unwrap

Methods inherited from class org.apache.commons.dbcp2.AbandonedTrace

getLastUsed

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ManagedConnection

public ManagedConnection(org.apache.commons.pool2.ObjectPool<C> pool,
                 TransactionRegistry transactionRegistry,
                 boolean accessToUnderlyingConnectionAllowed)
                  throws java.sql.SQLException

Throws:

java.sql.SQLException

Method Detail

close

public void close()
           throws java.sql.SQLException

Description copied from class: DelegatingConnection

Closes the underlying connection, and close any Statements that were not explicitly closed. Sub-classes that override this method must:

1. Call passivate()
2. Call close (or the equivalent appropriate action) on the wrapped connection
3. Set _closed to false

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.sql.Connection

Overrides:

close in class DelegatingConnection<C extends java.sql.Connection>

Throws:

java.sql.SQLException

commit

public void commit()
            throws java.sql.SQLException

Specified by:

commit in interface java.sql.Connection

Overrides:

commit in class DelegatingConnection<C extends java.sql.Connection>

Throws:

java.sql.SQLException

getDelegate

public C getDelegate()

Description copied from class: DelegatingConnection

Returns my underlying Connection.

Overrides:

getDelegate in class DelegatingConnection<C extends java.sql.Connection>

Returns:

my underlying Connection.

getInnermostDelegate

public java.sql.Connection getInnermostDelegate()

Description copied from class: DelegatingConnection

If my underlying Connection is not a DelegatingConnection, returns it, otherwise recursively invokes this method on my delegate.

Hence this method will return the first delegate that is not a DelegatingConnection, or null when no non-DelegatingConnection delegate can be found by traversing this chain.

This method is useful when you may have nested DelegatingConnections, and you want to make sure to obtain a "genuine" Connection.

Overrides:

getInnermostDelegate in class DelegatingConnection<C extends java.sql.Connection>

isAccessToUnderlyingConnectionAllowed

public boolean isAccessToUnderlyingConnectionAllowed()

If false, getDelegate() and getInnermostDelegate() will return null.

Returns:

if false, getDelegate() and getInnermostDelegate() will return null

rollback

public void rollback()
              throws java.sql.SQLException

Specified by:

rollback in interface java.sql.Connection

Overrides:

rollback in class DelegatingConnection<C extends java.sql.Connection>

Throws:

java.sql.SQLException

setAutoCommit

public void setAutoCommit(boolean autoCommit)
                   throws java.sql.SQLException

Specified by:

setAutoCommit in interface java.sql.Connection

Overrides:

setAutoCommit in class DelegatingConnection<C extends java.sql.Connection>

Throws:

java.sql.SQLException

setReadOnly

public void setReadOnly(boolean readOnly)
                 throws java.sql.SQLException

Specified by:

setReadOnly in interface java.sql.Connection

Overrides:

setReadOnly in class DelegatingConnection<C extends java.sql.Connection>

Throws:

java.sql.SQLException