1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
<!--$Id: env_set_errcall.so,v 10.16 1999/12/20 08:52:29 bostic Exp $-->
<!--$Id: m4.errset,v 10.8 2000/02/19 20:57:57 bostic Exp $-->
<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.-->
<!--All rights reserved.-->
<html>
<head>
<title>Berkeley DB: DbEnv.set_errcall</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><tr valign=top>
<td>
<h1>DbEnv.set_errcall</h1>
</td>
<td width="1%">
<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>
</td></tr></table>
<hr size=1 noshade>
<tt>
<h3><pre>
import com.sleepycat.db.*;
<p>
public interface DbErrcall
{
public abstract void errcall(String errpfx, String msg);
}
public class DbEnv
{
public void set_errcall(DbErrcall errcall);
...
}
</pre></h3>
<h1>Description</h1>
When an error occurs in the Berkeley DB library, an exception is thrown. In
some cases, however, the <b>errno</b> value may be insufficient to
completely describe the cause of the error, especially during initial
application debugging.
<p>The DbEnv.set_errcall method is used to enhance the mechanism for reporting error
messages to the application. The DbEnv.set_errcall method must be
called with a single object argument. The object's class must implement
the DbErrcall interface. In some cases, when an error occurs, Berkeley DB will
invoke the object's errcall() method with two arguments; the first is the
prefix string (as previously set by <a href="../api_java/db_set_errpfx.html">Db.set_errpfx</a> or
<a href="../api_java/env_set_errpfx.html">DbEnv.set_errpfx</a>), the second will be an error message string.
It is up to this method to display the message in an appropriate manner.
<p>Alternatively, you can use the <a href="../api_java/env_set_error_stream.html">DbEnv.set_error_stream</a> method to display
the additional information via an output stream. You should not mix these
approaches.
<p>This error logging enhancement does not slow performance or significantly
increase application size, and may be run during normal operation as well
as during application debugging.
<p>The DbEnv.set_errcall interface may be used to configure Berkeley DB at any time
during the life of the application.
<h3>Class</h3>
<a href="../api_java/dbenv_class.html">DbEnv</a>
<h1>See Also</h1>
<a href="../api_java/env_close.html">DbEnv.close</a>,
<a href="../api_java/env_open.html">DbEnv.open</a>,
<a href="../api_java/env_remove.html">DbEnv.remove</a>,
<a href="../api_java/env_strerror.html">DbEnv.strerror</a>,
<a href="../api_java/env_version.html">DbEnv.get_version_string</a>
<a href="../api_java/env_set_cachesize.html">DbEnv.set_cachesize</a>,
<a href="../api_java/env_set_errcall.html">DbEnv.set_errcall</a>,
<a href="../api_java/env_set_error_stream.html">DbEnv.set_error_stream</a>,
<a href="../api_java/env_set_errpfx.html">DbEnv.set_errpfx</a>,
<a href="../api_java/env_set_flags.html">DbEnv.set_flags</a>,
<a href="../api_java/env_set_mutexlocks.html">DbEnv.set_mutexlocks</a>,
and
<a href="../api_java/env_set_verbose.html">DbEnv.set_verbose</a>.
</tt>
<table><tr><td><br></td><td width="1%">
<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>
</td></tr></table>
<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font>
</body>
</html>
|
