org.tentackle.db
Class DbOperation

java.lang.Object
  org.tentackle.db.DbOperation

Direct Known Subclasses:

AppDbOperation

public class DbOperation
extends Object

A DbOperation provides methods that are not part of DbObjects and is associated to a Db-connection. Complex transactions are usually DbOperations. DbOperations are remote capabable.

Author:

harald

Constructor Summary

DbOperation(Db db)
Creates a db operation.

Method Summary

Db	getDb() Get the logical db connection for this operation.
DbOperationRemoteDelegate	getRemoteDelegate() Gets the delegate for remote connections. Each class has its own delegate.
DbOperationRemoteDelegate	getRemoteDelegate(Db db) Gets the RemoteDelegate for the class and db.
int	getRemoteDelegateId(Db db) Gets the delegateId of the class, i.e.
void	setDb(Db db) Sets the logical db connection for this operation.

Methods inherited from class java.lang.Object

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

Constructor Detail

DbOperation

public DbOperation(Db db)

Creates a db operation.

Parameters:

db - the logical db connection

Method Detail

setDb

public void setDb(Db db)

Sets the logical db connection for this operation.

Parameters:

db - the db connection

getDb

public Db getDb()

Get the logical db connection for this operation.

Returns:

the db connection

getRemoteDelegate

public DbOperationRemoteDelegate getRemoteDelegate()

Gets the delegate for remote connections.
Each class has its own delegate.

Returns:

the delegate for this object

getRemoteDelegateId

public int getRemoteDelegateId(Db db)

Gets the delegateId of the class, i.e. subclass of DbOperation. If the remoteDelegateId is 0, it will be prepared The delegateId is unique for each class. It is valid only in remote connections and is the same for all remote Db's. The RMI-server creates a delegate for each subclass of DbOperation (DbOperationRemoteDelegateImpl resp.)

Parameters:

db - the db connection

Returns:

the delegate id

getRemoteDelegate

public DbOperationRemoteDelegate getRemoteDelegate(Db db)

Gets the RemoteDelegate for the class and db.

Parameters:

db - the db connection

Returns:

the delegate