TransactionPropagationContextFactory


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15    * Lesser General Public License for more details.
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22  package org.jboss.tm;
23  
24  import javax.transaction.Transaction  ;
25  
26  
27  /**
28   *  Implementations of this interface are used for getting
29   *  a transaction propagation context at the client-side.
30   *  We need a specific implementation of this interface for
31   *  each kind of DTM we are going to interoperate with. (So
32   *  we may have 20 new classes if we are going to interoperate
33   *  with 20 different kinds of distributed transaction
34   *  managers.)
35   *  The reason for having the methods in this interface return
36   *  Object is that we do not really know what kind of transaction
37   *  propagation context is returned.
38   *
39   *  @see TransactionPropagationContextImporter
40   *  @author <a HREF="mailto:osh@sparre.dk">Ole Husgaard</a>
41   *  @version $Revision: 37459 $
42   */
43  public interface TransactionPropagationContextFactory
44  {
45     /**
46      *  Return a transaction propagation context for the transaction
47      *  currently associated with the invoking thread, or <code>null</code>
48      *  if the invoking thread is not associated with a transaction.
49      */
50     public Object   getTransactionPropagationContext();
51  
52     /**
53      *  Return a transaction propagation context for the transaction
54      *  given as an argument, or <code>null</code>
55      *  if the argument is <code>null</code> or of a type unknown to
56      *  this factory.
57      */
58     public Object   getTransactionPropagationContext(Transaction   tx);
59  
60  }
61  
62
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