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Berkeley DB: DbEnv::log_printf
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DbEnv::log_printf
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#include <db_cxx.h>
int
DbEnv::log_printf(DB_TXN *txnid, const char *fmt, ...);
Description: DbEnv::log_printf
The DbEnv::log_printf method appends an informational message to the Berkeley DB
database environment log files.
The DbEnv::log_printf method allows applications to include information in
the database environment log files, for later review using the
db_printlog utility. This method is intended for debugging and
performance tuning.
The DbEnv::log_printf method
either returns a non-zero error value
or throws an exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
Parameters
txnid- If the logged message refers to an application-specified transaction,
the txnid parameter is a transaction handle returned from
DbEnv::txn_begin; otherwise NULL.
fmt- A format string that specifies how subsequent arguments (or arguments
accessed via the variable-length argument facilities of stdarg(3)) are
converted for output. The format string may contain any formatting
directives supported by the underlying C library vsnprintf(3)
function.
Errors
The DbEnv::log_printf method
may fail and throw
DbException,
encapsulating one of the following non-zero errors, or return one of
the following non-zero errors:
EINVAL- An
invalid flag value or parameter was specified.
Class
DbEnv, DbLogc, DbLsn
See Also
Logging Subsystem and Related Methods
Copyright (c) 1996,2008 Oracle. All rights reserved.