org.firebirdsql.jca

Class FBManagedConnection

java.lang.Object

org.firebirdsql.jca.FBManagedConnection

All Implemented Interfaces:

javax.resource.spi.ManagedConnection, javax.transaction.xa.XAResource, org.firebirdsql.gds.impl.GDSHelper.GDSHelperErrorListener, Synchronizable

public class FBManagedConnection
extends java.lang.Object
implements javax.resource.spi.ManagedConnection, javax.transaction.xa.XAResource, org.firebirdsql.gds.impl.GDSHelper.GDSHelperErrorListener, Synchronizable

The class FBManagedConnection implements both the ManagedConnection and XAResource interfaces.

Version:

1.0

Author:

David Jencks

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	WARNING_NO_CHARSET

Fields inherited from interface javax.transaction.xa.XAResource

TMENDRSCAN, TMFAIL, TMJOIN, TMNOFLAGS, TMONEPHASE, TMRESUME, TMSTARTRSCAN, TMSUCCESS, TMSUSPEND, XA_OK, XA_RDONLY

Method Summary

Modifier and Type	Method and Description
void	addConnectionEventListener(javax.resource.spi.ConnectionEventListener listener) Add an ConnectionEventListener listener.
void	associateConnection(java.lang.Object connection) Used by the container to change the association of an application-level connection handle with a ManagedConneciton instance.
void	cleanup() Application server calls this method to force any cleanup on the ManagedConnection instance.
void	close(AbstractConnection c) Close this connection with regards to a wrapping AbstractConnection.
void	commit(javax.transaction.xa.Xid id, boolean onePhase) Commits a transaction.
void	destroy() Destroys the physical connection to the underlying resource manager.
void	end(javax.transaction.xa.Xid id, int flags) Dissociates a resource from a global transaction.
void	errorOccured(GDSException ex) Notify GDS container that error occured, if the ex represents a "fatal" one
protected javax.transaction.xa.Xid	findSingleXid(javax.transaction.xa.Xid externalXid) Obtain a single prepared transaction branch from a resource manager, based on a Xid
void	forget(javax.transaction.xa.Xid id) Indicates that no further action will be taken on behalf of this transaction (after a heuristic failure).
java.lang.Object	getConnection(javax.security.auth.Subject subject, javax.resource.spi.ConnectionRequestInfo cri) Creates a new connection handle for the underlying physical connection represented by the ManagedConnection instance.
FBConnectionRequestInfo	getConnectionRequestInfo() Get information about the current connection parameters.
java.lang.String	getDatabase()
org.firebirdsql.gds.impl.GDSHelper	getGDSHelper() Get instance of GDSHelper connected with this managed connection.
javax.resource.spi.LocalTransaction	getLocalTransaction() Returns a javax.resource.spi.LocalTransaction instance.
java.io.PrintWriter	getLogWriter() Gets the log writer for this ManagedConnection instance.
javax.resource.spi.ManagedConnectionFactory	getManagedConnectionFactory() Get the managed connection factory that created this managed connection.
javax.resource.spi.ManagedConnectionMetaData	getMetaData() Gets the metadata information for this connection's underlying EIS resource manager instance.
java.lang.Object	getSynchronizationObject() Get synchronization object.
int	getTransactionIsolation() Get the transaction isolation level of this connection.
TransactionParameterBuffer	getTransactionParameters()
TransactionParameterBuffer	getTransactionParameters(int isolation)
int	getTransactionTimeout() Gets the transaction timeout.
javax.transaction.xa.XAResource	getXAResource() Return an XA resource to the caller.
boolean	inDistributedTransaction()
void	internalStart(javax.transaction.xa.Xid id, int flags) Perform the internal processing to start associate a JDBC connection with a global transaction.
boolean	inTransaction()
boolean	isConnectionSharing() Check if connection sharing is enabled.
boolean	isManagedEnvironment()
boolean	isReadOnly() Retrieve whether this connection is readonly.
boolean	isSameRM(javax.transaction.xa.XAResource res) Retrieve whether this FBManagedConnection uses the same ResourceManager as res.
int	prepare(javax.transaction.xa.Xid xid) Prepares a transaction to commit.
javax.transaction.xa.Xid[]	recover(int flags) Obtain a list of prepared transaction branches from a resource manager.
void	removeConnectionEventListener(javax.resource.spi.ConnectionEventListener listener) Remove a ConnectionEventListner from the listing of listeners that will be notified for a ConnectionEvent.
void	rollback(javax.transaction.xa.Xid xid) Rolls back the work, assuming it was done on behalf of the specified transaction.
void	setConnectionSharing(boolean connectionSharing) Enable or disable connection sharing.
void	setLogWriter(java.io.PrintWriter out) Sets the log writer for this ManagedConnection instance.
void	setManagedEnvironment(boolean managedEnvironment)
void	setReadOnly(boolean readOnly) Set whether this connection is to be readonly
void	setTransactionIsolation(int isolation) Set the transaction level for this connection.
void	setTransactionParameters(int isolation, TransactionParameterBuffer transactionParams)
void	setTransactionParameters(TransactionParameterBuffer transactionParameters)
boolean	setTransactionTimeout(int timeout) Sets the transaction timeout.
void	start(javax.transaction.xa.Xid id, int flags) Associates a JDBC connection with a global transaction.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

WARNING_NO_CHARSET

public static final java.lang.String WARNING_NO_CHARSET

See Also:

Constant Field Values

Method Detail

errorOccured

public void errorOccured(GDSException ex)

Notify GDS container that error occured, if the ex represents a "fatal" one

Specified by:

errorOccured in interface org.firebirdsql.gds.impl.GDSHelper.GDSHelperErrorListener

Parameters:

ex - error that occurred.

See Also:

FatalGDSErrorHelper.isFatal(GDSException)

getGDSHelper

public org.firebirdsql.gds.impl.GDSHelper getGDSHelper()
                                                throws GDSException

Get instance of GDSHelper connected with this managed connection.

Returns:

instance of GDSHelper.

Throws:

GDSException - If this connection has no GDSHelper

getDatabase

public java.lang.String getDatabase()

isManagedEnvironment

public boolean isManagedEnvironment()

inTransaction

public boolean inTransaction()

setManagedEnvironment

public void setManagedEnvironment(boolean managedEnvironment)
                           throws javax.resource.ResourceException

Throws:

javax.resource.ResourceException

isConnectionSharing

public boolean isConnectionSharing()

Check if connection sharing is enabled. When connection sharing is enabled, multiple connection handles (AbstractConnection instances) can access this managed connection in thread-safe manner (they synchronize on this instance). This feature can be enabled only in JCA environment, any other environment must not use connection sharing.

Returns:

true if connection sharing is enabled.

setConnectionSharing

public void setConnectionSharing(boolean connectionSharing)
                          throws javax.resource.ResourceException

Enable or disable connection sharing. See isConnectionSharing() method for details.

Parameters:

connectionSharing - true if connection sharing must be enabled.

Throws:

javax.resource.ResourceException - If connection sharing state cannot be changed

getLocalTransaction

public javax.resource.spi.LocalTransaction getLocalTransaction()

Returns a javax.resource.spi.LocalTransaction instance. The LocalTransaction interface is used by the container to manage local transactions for a RM instance.

Specified by:

getLocalTransaction in interface javax.resource.spi.ManagedConnection

Returns:

LocalTransaction instance

Throws:

javax.resource.ResourceException - generic exception if operation fails

javax.resource.NotSupportedException - if the operation is not supported

javax.resource.spi.ResourceAdapterInternalException - resource adapter internal error condition

getMetaData

public javax.resource.spi.ManagedConnectionMetaData getMetaData()
                                                         throws javax.resource.ResourceException

Gets the metadata information for this connection's underlying EIS resource manager instance. The ManagedConnectionMetaData interface provides information about the underlying EIS instance associated with the ManagedConenction instance.

Specified by:

getMetaData in interface javax.resource.spi.ManagedConnection

Returns:

ManagedConnectionMetaData instance

Throws:

javax.resource.ResourceException - generic exception if operation fails

javax.resource.NotSupportedException - if the operation is not supported

setLogWriter

public void setLogWriter(java.io.PrintWriter out)

Sets the log writer for this ManagedConnection instance.

The log writer is a character output stream to which all logging and tracing messages for this ManagedConnection instance will be printed. Application Server manages the association of output stream with the ManagedConnection instance based on the connection pooling requirements.

When a ManagedConnection object is initially created, the default log writer associated with this instance is obtained from the ManagedConnectionFactory. An application server can set a log writer specific to this ManagedConnection to log/trace this instance using setLogWriter method.

Specified by:

setLogWriter in interface javax.resource.spi.ManagedConnection

Parameters:

out - Character Output stream to be associated

Throws:

javax.resource.ResourceException - generic exception if operation fails

javax.resource.spi.ResourceAdapterInternalException - resource adapter related error condition

getLogWriter

public java.io.PrintWriter getLogWriter()

Gets the log writer for this ManagedConnection instance.

The log writer is a character output stream to which all logging and tracing messages for this ManagedConnection instance will be printed. ConnectionManager manages the association of output stream with the ManagedConnection instance based on the connection pooling requirements.

The Log writer associated with a ManagedConnection instance can be one set as default from the ManagedConnectionFactory (that created this connection) or one set specifically for this instance by the application server.

Specified by:

getLogWriter in interface javax.resource.spi.ManagedConnection

Returns:

Character ourput stream associated with this ManagedConnection

Throws:

javax.resource.ResourceException - generic exception if operation fails

addConnectionEventListener

public void addConnectionEventListener(javax.resource.spi.ConnectionEventListener listener)

Add an ConnectionEventListener listener. The listener will be notified when a ConnectionEvent occurs.

Specified by:

addConnectionEventListener in interface javax.resource.spi.ManagedConnection

Parameters:

listener - The ConnectionEventListener to be added

removeConnectionEventListener

public void removeConnectionEventListener(javax.resource.spi.ConnectionEventListener listener)

Remove a ConnectionEventListner from the listing of listeners that will be notified for a ConnectionEvent.

Specified by:

removeConnectionEventListener in interface javax.resource.spi.ManagedConnection

Parameters:

listener - The ConnectionEventListener to be removed

associateConnection

public void associateConnection(java.lang.Object connection)
                         throws javax.resource.ResourceException

Used by the container to change the association of an application-level connection handle with a ManagedConneciton instance. The container should find the right ManagedConnection instance and call the associateConnection method.

The resource adapter is required to implement the associateConnection method. The method implementation for a ManagedConnection should dissociate the connection handle (passed as a parameter) from its currently associated ManagedConnection and associate the new connection handle with itself.

Specified by:

associateConnection in interface javax.resource.spi.ManagedConnection

Parameters:

connection - Application-level connection handle

Throws:

javax.resource.ResourceException - Failed to associate the connection handle with this ManagedConnection instance

javax.resource.spi.IllegalStateException - Illegal state for invoking this method

javax.resource.spi.ResourceAdapterInternalException - Resource adapter internal error condition

cleanup

public void cleanup()
             throws javax.resource.ResourceException

Application server calls this method to force any cleanup on the ManagedConnection instance.

The method ManagedConnection.cleanup()initiates a cleanup of the any client-specific state as maintained by a ManagedConnection instance. The cleanup should invalidate all connection handles that had been created using this ManagedConnection instance. Any attempt by an application component to use the connection handle after cleanup of the underlying ManagedConnection should result in an exception.

The cleanup of ManagedConnection is always driven by an application server. An application server should not invoke ManagedConnection.cleanup()when there is an uncompleted transaction (associated with a ManagedConnection instance) in progress.

The invocation of ManagedConnection.cleanup()method on an already cleaned-up connection should not throw an exception. The cleanup of ManagedConnection instance resets its client specific state and prepares the connection to be put back in to a connection pool. The cleanup method should not cause resource adapter to close the physical pipe and reclaim system resources associated with the physical connection.

Specified by:

cleanup in interface javax.resource.spi.ManagedConnection

Throws:

javax.resource.ResourceException - generic exception if operation fails

javax.resource.spi.ResourceAdapterInternalException - resource adapter internal error condition

javax.resource.spi.IllegalStateException - Illegal state for calling connection cleanup. Example - if a local transaction is in progress that doesn't allow connection cleanup

getConnection

public java.lang.Object getConnection(javax.security.auth.Subject subject,
                                      javax.resource.spi.ConnectionRequestInfo cri)
                               throws javax.resource.ResourceException

Creates a new connection handle for the underlying physical connection represented by the ManagedConnection instance. This connection handle is used by the application code to refer to the underlying physical connection. A connection handle is tied to its ManagedConnection instance in a resource adapter implementation specific way.

The ManagedConnection uses the Subject and additional ConnectionRequestInfo (which is specific to resource adapter and opaque to application server) to set the state of the physical connection.

Specified by:

getConnection in interface javax.resource.spi.ManagedConnection

Parameters:

subject - security context as JAAS subject

cri - ConnectionRequestInfo instance

Returns:

generic Object instance representing the connection handle. For CCI, the connection handle created by a ManagedConnection instance is of the type javax.resource.cci.Connection.

Throws:

javax.resource.ResourceException - generic exception if operation fails

javax.resource.spi.ResourceAdapterInternalException - resource adapter internal error condition

javax.resource.spi.SecurityException - security related error condition

javax.resource.spi.CommException - failed communication with EIS instance

javax.resource.spi.EISSystemException - internal error condition in EIS instance - used if EIS instance is involved in setting state of ManagedConnection

destroy

public void destroy()
             throws javax.resource.ResourceException

Destroys the physical connection to the underlying resource manager. To manage the size of the connection pool, an application server can explictly call ManagedConnection.destroy()to destroy a physical connection. A resource adapter should destroy all allocated system resources for this ManagedConnection instance when the method destroy is called.

Specified by:

destroy in interface javax.resource.spi.ManagedConnection

Throws:

javax.resource.ResourceException - generic exception if operation failed

javax.resource.spi.IllegalStateException - illegal state for destroying connection

getXAResource

public javax.transaction.xa.XAResource getXAResource()

Return an XA resource to the caller.

In both javax.sql.XAConnection and javax.resource.spi.MangagedConnection.

Specified by:

getXAResource in interface javax.resource.spi.ManagedConnection

Returns:

the XAResource

commit

public void commit(javax.transaction.xa.Xid id,
                   boolean onePhase)
            throws javax.transaction.xa.XAException

Commits a transaction.

Specified by:

commit in interface javax.transaction.xa.XAResource

Throws:

javax.transaction.xa.XAException - Occurs when the state was not correct (end never called), the transaction ID is wrong, the connection was set to Auto-Commit, or the commit on the underlying connection fails. The error code differs depending on the exact situation.

end

public void end(javax.transaction.xa.Xid id,
                int flags)
         throws javax.transaction.xa.XAException

Dissociates a resource from a global transaction.

Specified by:

end in interface javax.transaction.xa.XAResource

Throws:

javax.transaction.xa.XAException - Occurs when the state was not correct (end called twice), or the transaction ID is wrong.

forget

public void forget(javax.transaction.xa.Xid id)
            throws javax.transaction.xa.XAException

Indicates that no further action will be taken on behalf of this transaction (after a heuristic failure). It is assumed this will be called after a failed commit or rollback.

Specified by:

forget in interface javax.transaction.xa.XAResource

Throws:

javax.transaction.xa.XAException - Occurs when the state was not correct (end never called), or the transaction ID is wrong.

getTransactionTimeout

public int getTransactionTimeout()
                          throws javax.transaction.xa.XAException

Gets the transaction timeout.

Specified by:

getTransactionTimeout in interface javax.transaction.xa.XAResource

Throws:

javax.transaction.xa.XAException

isSameRM

public boolean isSameRM(javax.transaction.xa.XAResource res)
                 throws javax.transaction.xa.XAException

Retrieve whether this FBManagedConnection uses the same ResourceManager as res. This method relies on res being a Firebird implementation of XAResource.

Specified by:

isSameRM in interface javax.transaction.xa.XAResource

Parameters:

res - The other XAResource to compare to

Returns:

true if res uses the same ResourceManager, false otherwise

Throws:

javax.transaction.xa.XAException

prepare

public int prepare(javax.transaction.xa.Xid xid)
            throws javax.transaction.xa.XAException

Prepares a transaction to commit.

Specified by:

prepare in interface javax.transaction.xa.XAResource

Throws:

javax.transaction.xa.XAException - Occurs when the state was not correct (end never called), the transaction ID is wrong, or the connection was set to Auto-Commit.

recover

public javax.transaction.xa.Xid[] recover(int flags)
                                   throws javax.transaction.xa.XAException

Obtain a list of prepared transaction branches from a resource manager. The transaction manager calls this method during recovery to obtain the list of transaction branches that are currently in prepared or heuristically completed states.

Specified by:

recover in interface javax.transaction.xa.XAResource

Parameters:

flags - One of TMSTARTRSCAN, TMENDRSCAN, TMNOFLAGS. TMNOFLAGS must be used when no other flags are set in flags.

Returns:

The resource manager returns zero or more XIDs for the transaction branches that are currently in a prepared or heuristically completed state. If an error occurs during the operation, the resource manager should throw the appropriate XAException.

Throws:

javax.transaction.xa.XAException - An error has occurred. Possible values are XAER_RMERR, XAER_RMFAIL, XAER_INVAL, and XAER_PROTO.

findSingleXid

protected javax.transaction.xa.Xid findSingleXid(javax.transaction.xa.Xid externalXid)
                                          throws javax.transaction.xa.XAException

Obtain a single prepared transaction branch from a resource manager, based on a Xid

Parameters:

externalXid - The Xid to find

Returns:

The Xid if found, otherwise null.

Throws:

javax.transaction.xa.XAException - An error has occurred. Possible values are XAER_RMERR, XAER_RMFAIL, XAER_INVAL, and XAER_PROTO.

getSynchronizationObject

public final java.lang.Object getSynchronizationObject()

Description copied from interface: Synchronizable

Get synchronization object.

Specified by:

getSynchronizationObject in interface Synchronizable

Returns:

object, cannot be null.

rollback

public void rollback(javax.transaction.xa.Xid xid)
              throws javax.transaction.xa.XAException

Rolls back the work, assuming it was done on behalf of the specified transaction.

Specified by:

rollback in interface javax.transaction.xa.XAResource

Throws:

javax.transaction.xa.XAException - Occurs when the state was not correct (end never called), the transaction ID is wrong, the connection was set to Auto-Commit, or the rollback on the underlying connection fails. The error code differs depending on the exact situation.

setTransactionTimeout

public boolean setTransactionTimeout(int timeout)
                              throws javax.transaction.xa.XAException

Sets the transaction timeout. This is saved, but the value is not used by the current implementation.

Specified by:

setTransactionTimeout in interface javax.transaction.xa.XAResource

Parameters:

timeout - The timeout to be set in seconds

Throws:

javax.transaction.xa.XAException

inDistributedTransaction

public boolean inDistributedTransaction()

start

public void start(javax.transaction.xa.Xid id,
                  int flags)
           throws javax.transaction.xa.XAException

Associates a JDBC connection with a global transaction. We assume that end will be called followed by prepare, commit, or rollback. If start is called after end but before commit or rollback, there is no way to distinguish work done by different transactions on the same connection). If start is called more than once before end, either it's a duplicate transaction ID or illegal transaction ID (since you can't have two transactions associated with one DB connection).

Specified by:

start in interface javax.transaction.xa.XAResource

Parameters:

id - A global transaction identifier to be associated with the resource

flags - One of TMNOFLAGS, TMJOIN, or TMRESUME

Throws:

javax.transaction.xa.XAException - Occurs when the state was not correct (start called twice), the transaction ID is wrong, or the instance has already been closed.

internalStart

public void internalStart(javax.transaction.xa.Xid id,
                          int flags)
                   throws javax.transaction.xa.XAException,
                          GDSException

Perform the internal processing to start associate a JDBC connection with a global transaction.

Parameters:

id - A global transaction identifier to be associated with the resource

flags - One of TMNOFLAGS, TMJOIN, or TMRESUME

Throws:

javax.transaction.xa.XAException - If the transaction is already started, or this connection cannot participate in the distributed transaction

GDSException

See Also:

start(Xid, int)

close

public void close(AbstractConnection c)

Close this connection with regards to a wrapping AbstractConnection.

Parameters:

c - The AbstractConnection that is being closed

getConnectionRequestInfo

public FBConnectionRequestInfo getConnectionRequestInfo()

Get information about the current connection parameters.

Returns:

instance of FBConnectionRequestInfo.

getTransactionParameters

public TransactionParameterBuffer getTransactionParameters()

setTransactionParameters

public void setTransactionParameters(TransactionParameterBuffer transactionParameters)

getTransactionParameters

public TransactionParameterBuffer getTransactionParameters(int isolation)

setTransactionParameters

public void setTransactionParameters(int isolation,
                                     TransactionParameterBuffer transactionParams)

getTransactionIsolation

public int getTransactionIsolation()
                            throws javax.resource.ResourceException

Get the transaction isolation level of this connection. The level is one of the static final fields of java.sql.Connection (i.e. TRANSACTION_READ_COMMITTED, TRANSACTION_READ_UNCOMMITTED, TRANSACTION_REPEATABLE_READ, TRANSACTION_SERIALIZABLE.

Returns:

Value representing a transaction isolation level defined in Connection.

Throws:

javax.resource.ResourceException - If the transaction level cannot be retrieved

See Also:

Connection, setTransactionIsolation(int)

setTransactionIsolation

public void setTransactionIsolation(int isolation)
                             throws javax.resource.ResourceException

Set the transaction level for this connection. The level is one of the static final fields of java.sql.Connection (i.e. TRANSACTION_READ_COMMITTED, TRANSACTION_READ_UNCOMMITTED, TRANSACTION_REPEATABLE_READ, TRANSACTION_SERIALIZABLE.

Parameters:

isolation - Value representing a transaction isolation level defined in Connection.

Throws:

javax.resource.ResourceException - If the transaction level cannot be retrieved

See Also:

Connection, getTransactionIsolation()

getManagedConnectionFactory

public javax.resource.spi.ManagedConnectionFactory getManagedConnectionFactory()

Get the managed connection factory that created this managed connection.

Returns:

instance of ManagedConnectionFactory.

setReadOnly

public void setReadOnly(boolean readOnly)

Set whether this connection is to be readonly

Parameters:

readOnly - If true, the connection will be set read-only, otherwise it will be writable

isReadOnly

public boolean isReadOnly()

Retrieve whether this connection is readonly.

Returns:

true if this connection is readonly, false otherwise