<!--$Id: txn_discard.html,v 1.1 2003/02/15 04:55:55 zarzycki Exp $--> <!--Copyright 1997-2002 by Sleepycat Software, Inc.--> <!--All rights reserved.--> <!--See the file LICENSE for redistribution information.--> <html> <head> <title>Berkeley DB: DbTxn.discard</title> <meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++"> </head> <body bgcolor=white> <a name="2"><!--meow--></a> <table width="100%"><tr valign=top> <td> <h1>DbTxn.discard</h1> </td> <td align=right> <a href="../api_java/c_index.html"><img src="../images/api.gif" alt="API"></a><a href="../reftoc.html"><img src="../images/ref.gif" alt="Ref"></a> </td></tr></table> <hr size=1 noshade> <tt> <h3><pre> import com.sleepycat.db.*; <p> public void discard(int flags) throws DbException; </pre></h3> <h1>Description</h1> <p>The DbTxn.discard method frees up all the per-process resources associated with the specified <a href="../api_java/txn_class.html">DbTxn</a> handle, neither committing nor aborting the transaction. This call may be used only after calls to <a href="../api_java/txn_recover.html">DbEnv.txn_recover</a> when there are multiple global transaction managers recovering transactions in a single Berkeley DB environment. Any transactions returned by <a href="../api_java/txn_recover.html">DbEnv.txn_recover</a> that are not handled by the current global transaction manager should be discarded using DbTxn.discard. <p>The <b>flags</b> parameter is currently unused, and must be set to 0. <p>The DbTxn.discard method returns EINVAL if the transaction handle does not refer to a transaction that was recovered into a prepared but not yet completed state. Otherwise, the DbTxn.discard method throws an exception that encapsulates a non-zero error value on failure. <p>After DbTxn.discard has been called, regardless of its return, the <a href="../api_java/txn_class.html">DbTxn</a> handle may not be accessed again. <h1>Errors</h1> <p>The DbTxn.discard method may fail and throw an exception encapsulating a non-zero error for the following conditions: <p><dl compact> <p><dt>EINVAL<dd>An invalid flag value or parameter was specified. <p>The transaction handle does not refer to a transaction that was recovered into a prepared but not yet completed state. </dl> <p>The DbTxn.discard method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods. If a catastrophic error has occurred, the DbTxn.discard method may fail and throw a <a href="../api_java/runrec_class.html">DbRunRecoveryException</a>, in which case all subsequent Berkeley DB calls will fail in the same way. <h1>Class</h1> <a href="../api_java/env_class.html">DbEnv</a>, <a href="../api_java/txn_class.html">DbTxn</a> <h1>See Also</h1> <a href="../api_java/txn_list.html">Transaction Subsystem and Related Methods</a> </tt> <table width="100%"><tr><td><br></td><td align=right> <a href="../api_java/c_index.html"><img src="../images/api.gif" alt="API"></a><a href="../reftoc.html"><img src="../images/ref.gif" alt="Ref"></a> </td></tr></table> <p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font> </body> </html>