db_set_feedback.html [plain text]
<!--$Id: db_set_feedback.html,v 1.1.1.1 2003/02/15 04:55:50 zarzycki Exp $-->
<!--Copyright 1997-2002 by Sleepycat Software, Inc.-->
<!--All rights reserved.-->
<!--See the file LICENSE for redistribution information.-->
<html>
<head>
<title>Berkeley DB: Db.set_feedback</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>Db.set_feedback</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 interface DbFeedback
{
public abstract void feedback(Db db, int opcode, int pct);
}
public class Db
{
public void set_feedback(DbFeedback db_feedback)
throws DbException;
...
}
</pre></h3>
<h1>Description</h1>
<p>Some operations performed by the Berkeley DB library can take non-trivial
amounts of time. The Db.set_feedback method can be used by
applications to monitor progress within these operations.
<p>When an operation is likely to take a long time, Berkeley DB will call the
specified callback method. This method must be declared with
three arguments: the first will be a reference to the enclosing database
handle; the second a flag value; and the third the percent of the
operation that has been completed, specified as an integer value between
0 and 100. It is up to the callback method to display this
information in an appropriate manner.
<p>The <b>opcode</b> argument may take on any of the following values:
<p><dl compact>
<p><dt><a name="Db.DB_UPGRADE">Db.DB_UPGRADE</a><dd>The underlying database is being upgraded.
<p><dt><a name="Db.DB_VERIFY">Db.DB_VERIFY</a><dd>The underlying database is being verified.
</dl>
<p>The Db.set_feedback interface may be called at any time during the life of
the application.
<p>The Db.set_feedback method throws an exception that encapsulates a non-zero error value on
failure.
<h1>Class</h1>
<a href="../api_java/db_class.html">Db</a>
<h1>See Also</h1>
<a href="../api_java/db_list.html">Databases 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>