<!--$Id: db_set_errcall.so,v 10.8 2001/04/04 19:06:26 bostic Exp $--> <!--$Id: env_set_errcall.so,v 10.22 2001/10/22 15:24:28 bostic Exp $--> <!--Copyright 1997-2001 by Sleepycat Software, Inc.--> <!--All rights reserved.--> <html> <head> <title>Berkeley DB: Db.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 width="100%"><tr valign=top> <td> <h1>Db.set_errcall</h1> </td> <td align=right> <a href="../../db4-devel-4.0.14/api_java/c_index.html"><img src="../../db4-4.0.14/images/api.gif" alt="API"></a><a href="../reftoc.html"><img src="../../db4-4.0.14/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 Db { 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 <a href="../../db4-devel-4.0.14/api_java/env_set_errcall.html">DbEnv.set_errcall</a> and Db.set_errcall methods are used to enhance the mechanism for reporting error messages to the application. The <a href="../../db4-devel-4.0.14/api_java/env_set_errcall.html">DbEnv.set_errcall</a> and Db.set_errcall methods 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="../../db4-devel-4.0.14/api_java/db_set_errpfx.html">Db.set_errpfx</a> or <a href="../../db4-devel-4.0.14/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="../../db4-devel-4.0.14/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>For <a href="../../db4-devel-4.0.14/api_java/db_class.html">Db</a> handles opened inside of Berkeley DB environments, calling the Db.set_errcall method affects the entire environment and is equivalent to calling the <a href="../../db4-devel-4.0.14/api_java/env_set_errcall.html">DbEnv.set_errcall</a> method. <p>The Db.set_errcall interface may be used to configure Berkeley DB at any time during the life of the application. <h1>Class</h1> <a href="../../db4-devel-4.0.14/api_java/db_class.html">Db</a> <h1>See Also</h1> <a href="../../db4-devel-4.0.14/api_java/db_associate.html">Db.associate</a>, <a href="../../db4-devel-4.0.14/api_java/db_close.html">Db.close</a>, <a href="../../db4-devel-4.0.14/api_java/db_cursor.html">Db.cursor</a>, <a href="../../db4-devel-4.0.14/api_java/db_del.html">Db.del</a>, <a href="../../db4-devel-4.0.14/api_java/db_fd.html">Db.fd</a>, <a href="../../db4-devel-4.0.14/api_java/db_get.html">Db.get</a>, <a href="../../db4-devel-4.0.14/api_java/db_get.html">Db.pget</a>, <a href="../../db4-devel-4.0.14/api_java/db_get_byteswapped.html">Db.get_byteswapped</a>, <a href="../../db4-devel-4.0.14/api_java/db_get_type.html">Db.get_type</a>, <a href="../../db4-devel-4.0.14/api_java/db_join.html">Db.join</a>, <a href="../../db4-devel-4.0.14/api_java/db_key_range.html">Db.key_range</a>, <a href="../../db4-devel-4.0.14/api_java/db_open.html">Db.open</a>, <a href="../../db4-devel-4.0.14/api_java/db_put.html">Db.put</a>, <a href="../../db4-devel-4.0.14/api_java/db_remove.html">Db.remove</a>, <a href="../../db4-devel-4.0.14/api_java/db_rename.html">Db.rename</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_append_recno.html">Db.set_append_recno</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_bt_minkey.html">Db.set_bt_minkey</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_cachesize.html">Db.set_cachesize</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_errcall.html">Db.set_errcall</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_errpfx.html">Db.set_errpfx</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_feedback.html">Db.set_feedback</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_flags.html">Db.set_flags</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_h_ffactor.html">Db.set_h_ffactor</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_h_nelem.html">Db.set_h_nelem</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_lorder.html">Db.set_lorder</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_pagesize.html">Db.set_pagesize</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_q_extentsize.html">Db.set_q_extentsize</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_re_delim.html">Db.set_re_delim</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_re_len.html">Db.set_re_len</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_re_pad.html">Db.set_re_pad</a>, <a href="../../db4-devel-4.0.14/api_java/db_set_re_source.html">Db.set_re_source</a>, <a href="../../db4-devel-4.0.14/api_java/db_stat.html">Db.stat</a>, <a href="../../db4-devel-4.0.14/api_java/db_sync.html">Db.sync</a>, <a href="../../db4-devel-4.0.14/api_java/db_truncate.html">Db.truncate</a>, <a href="../../db4-devel-4.0.14/api_java/db_upgrade.html">Db.upgrade</a>, and <a href="../../db4-devel-4.0.14/api_java/db_verify.html">Db.verify</a>. </tt> <table width="100%"><tr><td><br></td><td align=right> <a href="../../db4-devel-4.0.14/api_java/c_index.html"><img src="../../db4-4.0.14/images/api.gif" alt="API"></a><a href="../reftoc.html"><img src="../../db4-4.0.14/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>