AbstractManagedConnection (DataNucleus Core 3.2.10 API)

java.lang.Object
- org.datanucleus.store.connection.AbstractManagedConnection

All Implemented Interfaces:

ManagedConnection
```
public abstract class AbstractManagedConnection
extends Object
implements ManagedConnection
```
Abstract implementation of a managed connection. There are three primary modes for a connection.
- Transactional - the commit of connection is controlled external to this class, and when we release the connection it is handed back into a pooled state, available for reuse.
- Non-transactional (1) - the commit of the connection happens at close and when we release the connection it closes the connection (after committing it).
- Non-transactional (2) - the commit of the connection happens at release, and when we release the connection it is handed back into a pooled state, available for reuse.

Field Summary

Fields
Modifier and Type	Field and Description
`protected boolean`	`closeOnRelease` Whether we should close() when release() of the connection is called.
`protected boolean`	`commitOnRelease` Whether we should commit() the connection on release().
`protected Object`	`conn` The underlying (datastore-specific) connection.
`protected List<ManagedConnectionResourceListener>`	`listeners` Listeners for the connection.
`protected boolean`	`locked` Whether the connection is locked for use.
`protected int`	`useCount` Count on the number of outstanding uses of this connection.

Constructor Summary

Constructors
Constructor and Description

AbstractManagedConnection()

Constructors
Constructor and Description
`AbstractManagedConnection()`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`addListener(ManagedConnectionResourceListener listener)` Registers a ManagedConnectionResourceListener to be notified of events.
`boolean`	`closeAfterTransactionEnd()` Convenience method for whether this connection should be closed after the end of transaction.
`boolean`	`closeOnRelease()`
`boolean`	`commitOnRelease()`
`XAResource`	`getXAResource()` Obtain an XAResource which can be enlisted in a transaction Override this if you intend on supporting this as an XA resource (default = not supported).
`protected void`	`incrementUseCount()`
`boolean`	`isLocked()`
`void`	`lock()`
`void`	`release()` Release this connection back to us so we can pool it if required.
`void`	`removeListener(ManagedConnectionResourceListener listener)` Deregister a ManagedConnectionResourceListener.
`void`	`setCloseOnRelease(boolean close)`
`void`	`setCommitOnRelease(boolean commit)`
`String`	`toString()` Method to return a string form of this object for convenience debug.
`void`	`transactionFlushed()` Flush the connection.
`void`	`transactionPreClose()` Prepare the connection for end of transaction.
`void`	`unlock()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.datanucleus.store.connection.ManagedConnection
close, getConnection

- Field Detail
  - conn
```
protected Object conn
```
    The underlying (datastore-specific) connection.
  - closeOnRelease
```
protected boolean closeOnRelease
```
    Whether we should close() when release() of the connection is called.
  - commitOnRelease
```
protected boolean commitOnRelease
```
    Whether we should commit() the connection on release().
  - locked
```
protected boolean locked
```
    Whether the connection is locked for use.
  - listeners
```
protected List<ManagedConnectionResourceListener> listeners
```
    Listeners for the connection.
  - useCount
```
protected int useCount
```
    Count on the number of outstanding uses of this connection. Incremented on get. Decremented on release().
- Constructor Detail
  - AbstractManagedConnection
```
public AbstractManagedConnection()
```
- Method Detail
  - incrementUseCount
```
protected void incrementUseCount()
```
  - release
```
public void release()
```
    Release this connection back to us so we can pool it if required. In the case of a transactional connection it is allocated and released and always pooled (not committed) during the transaction. With non-transactional connections, they can be pooled (where selected), or not (default).
    
    Specified by:
    
    release in interface ManagedConnection
  - transactionFlushed
```
public void transactionFlushed()
```
    Description copied from interface: ManagedConnection
    
    Flush the connection. It must invoke the operation ManagedConnectionResourceListener.transactionFlushed()
    
    Specified by:
    
    transactionFlushed in interface ManagedConnection
  - transactionPreClose
```
public void transactionPreClose()
```
    Description copied from interface: ManagedConnection
    
    Prepare the connection for end of transaction. It must invoke the operation ManagedConnectionResourceListener.transactionPreClose()
    
    Specified by:
    
    transactionPreClose in interface ManagedConnection
  - setCloseOnRelease
```
public void setCloseOnRelease(boolean close)
```
    Specified by:
    
    setCloseOnRelease in interface ManagedConnection
  - setCommitOnRelease
```
public void setCommitOnRelease(boolean commit)
```
    Specified by:
    
    setCommitOnRelease in interface ManagedConnection
  - closeOnRelease
```
public boolean closeOnRelease()
```
    Specified by:
    
    closeOnRelease in interface ManagedConnection
  - commitOnRelease
```
public boolean commitOnRelease()
```
    Specified by:
    
    commitOnRelease in interface ManagedConnection
  - addListener
```
public void addListener(ManagedConnectionResourceListener listener)
```
    Description copied from interface: ManagedConnection
    
    Registers a ManagedConnectionResourceListener to be notified of events.
    
    Specified by:
    
    addListener in interface ManagedConnection
    
    Parameters:
    listener - The listener
  - removeListener
```
public void removeListener(ManagedConnectionResourceListener listener)
```
    Description copied from interface: ManagedConnection
    
    Deregister a ManagedConnectionResourceListener.
    
    Specified by:
    
    removeListener in interface ManagedConnection
    
    Parameters:
    listener - The listener
  - isLocked
```
public boolean isLocked()
```
    Specified by:
    
    isLocked in interface ManagedConnection
  - lock
```
public void lock()
```
    Specified by:
    
    lock in interface ManagedConnection
  - unlock
```
public void unlock()
```
    Specified by:
    
    unlock in interface ManagedConnection
  - getXAResource
```
public XAResource getXAResource()
```
    Obtain an XAResource which can be enlisted in a transaction Override this if you intend on supporting this as an XA resource (default = not supported).
    
    Specified by:
    
    getXAResource in interface ManagedConnection
    
    Returns:
    The XA resource
  - closeAfterTransactionEnd
```
public boolean closeAfterTransactionEnd()
```
    Description copied from interface: ManagedConnection
    
    Convenience method for whether this connection should be closed after the end of transaction. In DN 2.x, 3.0, 3.1 this was always true, and a connection lasted until txn commit, and then had to get a new connection. In DN 3.2+ this is configurable per datastore connection factory.
    
    Specified by:
    
    closeAfterTransactionEnd in interface ManagedConnection
    
    Returns:
    Whether the ConnectionManager should call close() on it when a txn ends
  - toString
```
public String toString()
```
    Method to return a string form of this object for convenience debug.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    The String form

Class AbstractManagedConnection

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.datanucleus.store.connection.ManagedConnection

Field Detail

conn

closeOnRelease

commitOnRelease

locked

listeners

useCount

Constructor Detail

AbstractManagedConnection

Method Detail

incrementUseCount

release

transactionFlushed

transactionPreClose

setCloseOnRelease

setCommitOnRelease

closeOnRelease

commitOnRelease

addListener

removeListener

isLocked

lock

unlock

getXAResource

closeAfterTransactionEnd

toString