[dbcp] Managed Connection support
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Key: DBCP-228
URL: https://issues.apache.org/jira/browse/DBCP-228
Project: Commons Dbcp
Issue Type: New Feature
Reporter: Dain Sundstrom
Attachments: ManagedConnection.patch
This patch adds support for pooling of ManagedConnections. A managed
connection is responsible for managing a database connection in a transactional
environment (typically called "Container Managed"). A managed connection
opperates like any other connection when no gloabal 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.
This patch supports full XADataSources and non-XA data sources using local
transaction semantics. non-XA data sources commit and rollback as part of the
transaction but are not recoverable in the case of an error because they do not
implement the two-phase commit protocol.
The patch includes test cases and javadoc comments.
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