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84 lines
3.5 KiB
HTML
<!--$Id: env_set_tx_recover.so,v 10.26 2000/07/09 19:13:19 bostic Exp $-->
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<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.-->
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<!--All rights reserved.-->
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<html>
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<head>
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<title>Berkeley DB: DbEnv.set_tx_recover</title>
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<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
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<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++">
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</head>
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<body bgcolor=white>
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<a name="2"><!--meow--></a>
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<table><tr valign=top>
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<td>
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<h1>DbEnv.set_tx_recover</h1>
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</td>
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<td width="1%">
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<a href="../api_java/java_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
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</td></tr></table>
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<hr size=1 noshade>
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<tt>
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<h3><pre>
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import com.sleepycat.db.*;
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<p>
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public interface DbTxnRecover
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{
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public abstract int
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tx_recover(DbEnv dbenv, Dbt log_rec, DbLsn lsn, int op);
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}
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public class DbEnv
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{
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public void set_tx_recover(DbTxnRecover tx_recover)
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throws DbException;
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...
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}
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</pre></h3>
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<h1>Description</h1>
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<p>Set the application's method to be called during transaction abort
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and recovery. This method must return 0 on success and either
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<b>errno</b> or a value outside of the Berkeley DB error name space on
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failure. It takes four arguments:
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<p><dl compact>
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<p><dt>dbenv <dd>A Berkeley DB environment.
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<p><dt>log_rec<dd>A log record.
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<p><dt>lsn<dd>A log sequence number.
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<p><dt>op<dd>One of the following values:
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<p><dl compact>
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<p><dt><a name="Db.DB_TXN_BACKWARD_ROLL">Db.DB_TXN_BACKWARD_ROLL</a><dd>The log is being read backward to determine which transactions have been
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committed and to abort those operations that were not, undo the operation
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described by the log record.
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<p><dt><a name="Db.DB_TXN_FORWARD_ROLL">Db.DB_TXN_FORWARD_ROLL</a><dd>The log is being played forward, redo the operation described by the log
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record.
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<p><dt><a name="Db.DB_TXN_ABORT">Db.DB_TXN_ABORT</a><dd>The log is being read backwards during a transaction abort, undo the
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operation described by the log record.
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</dl>
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</dl>
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<p>The DbEnv.set_tx_recover interface may only be used to configure Berkeley DB before
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the <a href="../api_java/env_open.html">DbEnv.open</a> interface is called.
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<p>The DbEnv.set_tx_recover method throws an exception that encapsulates a non-zero error value on
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failure.
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<h1>Errors</h1>
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<p><dl compact>
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<p><dt>EINVAL<dd>An invalid flag value or parameter was specified.
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<p>Called after <a href="../api_java/env_open.html">DbEnv.open</a> was called.
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</dl>
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<h3>Classes</h3>
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<a href="../api_java/dbenv_class.html">DbEnv</a>, <a href="../api_java/txn_class.html">DbTxn</a>
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<h1>See Also</h1>
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<a href="../api_java/env_set_tx_max.html">DbEnv.set_tx_max</a>,
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<a href="../api_java/env_set_tx_timestamp.html">DbEnv.set_tx_timestamp</a>,
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<a href="../api_java/txn_abort.html">DbTxn.abort</a>,
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<a href="../api_java/txn_begin.html">DbEnv.txn_begin</a>,
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<a href="../api_java/txn_checkpoint.html">DbEnv.txn_checkpoint</a>,
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<a href="../api_java/txn_commit.html">DbTxn.commit</a>,
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<a href="../api_java/txn_id.html">DbTxn.id</a>,
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<a href="../api_java/txn_prepare.html">DbTxn.prepare</a>
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and
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<a href="../api_java/txn_stat.html">DbEnv.txn_stat</a>.
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</tt>
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<table><tr><td><br></td><td width="1%">
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<a href="../api_java/java_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
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</td></tr></table>
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<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font>
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</body>
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