public interface DbErrcall
public abstract void errcall(String errpfx, String msg);
public class Db
public void set_errcall(DbErrcall errcall);
When an error occurs in the Berkeley DB library, an exception is thrown. In
some cases, however, the errno value may be insufficient to
completely describe the cause of the error, especially during initial
The DbEnv.set_errcall and Db.set_errcall methods are used to
enhance the mechanism for reporting error messages to the application.
The DbEnv.set_errcall 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 Db.set_errpfx or
DbEnv.set_errpfx), the second will be an error message string.
It is up to this method to display the message in an appropriate
Alternatively, you can use the DbEnv.set_error_stream and
Db.set_error_stream methods to display the additional information via
an output stream. You should not mix these approaches.
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.
For Db handles opened inside of Berkeley DB environments, calling the
Db.set_errcall method affects the entire environment and is equivalent to calling
the DbEnv.set_errcall method.
The Db.set_errcall interface may be called at any time during the life of
Databases and Related Methods
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