org.datanucleus
Class ConnectionManagerImpl

java.lang.Object
  org.datanucleus.ConnectionManagerImpl

All Implemented Interfaces:

ConnectionManager

public class ConnectionManagerImpl
extends java.lang.Object
implements ConnectionManager

Manager of connections for an OMF, allowing ManagedConnection pooling, enlistment in transaction. The pool caches one connection per ObjectManager. The "allocate" method can create connections and enlist them (like most normal persistence operations need) or create a connection and return it.

Version:

$Revision: 1.17 $

Field Summary

protected static Localiser

LOCALISER Localisation of messages.

Constructor Summary

ConnectionManagerImpl(OMFContext omfContext)
Constructor.

Method Summary

ManagedConnection

allocateConnection(ConnectionFactory factory, ObjectManager om, java.util.Map options) Method to return a connection for this ObjectManager.

Methods inherited from class java.lang.Object

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

Field Detail

LOCALISER

protected static final Localiser LOCALISER

Localisation of messages.

Constructor Detail

ConnectionManagerImpl

public ConnectionManagerImpl(OMFContext omfContext)

Constructor.

Parameters:

omfContext - OMFContext for this manager.

Method Detail

allocateConnection

public ManagedConnection allocateConnection(ConnectionFactory factory,
                                            ObjectManager om,
                                            java.util.Map options)

Method to return a connection for this ObjectManager. If a connection for the ObjectManager exists in the cache will return it. If no connection exists will create a new one using the ConnectionFactory.

Specified by:

allocateConnection in interface ConnectionManager

Parameters:

factory - ConnectionFactory it relates to

om - The ObjectManager

options - Options for the connection (e.g isolation). These will override those of the txn itself

Returns:

The ManagedConnection