Edit File - File Manager

Edit File: lockng_class.html

<html>
<head>
<title>Berkeley DB: DbLockNotGrantedException</title>
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++">
</head>
<body bgcolor=white>
<table width="100%"><tr valign=top>
<td>
DbLockNotGrantedException
</td>
<td align=right>
<a href="../../db4-devel-4.7.25/api_cxx/api_core.html"><img src="../../db4-devel-4.7.25/images/api.gif" alt="API"></a>
<a href="../../db4-devel-4.7.25/ref/toc.html"><img src="../../db4-devel-4.7.25/images/ref.gif" alt="Ref"></a></td>
</tr></table>
<hr size=1 noshade>
<tt>
<pre>
#include &lt;db_cxx.h&gt;

class DbLockNotGrantedException : public DbException {
public:
	db_lockop_t get_op() const;
	db_lockmode_t get_mode() const;
	const Dbt* get_obj() const;
	DbLock *get_lock() const;
	int get_index() const;
};
</pre>
<hr size=1 noshade>
Description: DbLockNotGrantedException
This information describes the DbLockNotGrantedException class and
how it is used by the various Db* classes.
A DbLockNotGrantedException is thrown when a lock requested using
the <a href="../../db4-devel-4.7.25/api_cxx/lock_get.html">DbEnv::lock_get</a> or <a href="../../db4-devel-4.7.25/api_cxx/lock_vec.html">DbEnv::lock_vec</a> methods, where the <a href="../../db4-devel-4.7.25/api_cxx/lock_vec.html#DB_LOCK_NOWAIT">DB_LOCK_NOWAIT</a>
flag or lock timers were configured, could not be granted before the
wait-time expired.
Additionally, DbLockNotGrantedException is thrown when a Berkeley DB
Concurrent Data Store database environment configured for lock timeouts
was unable to grant a lock in the allowed time.
Additionally, DbLockNotGrantedException is thrown when lock or
transaction timeouts have been configured, a database operation has
timed out, and the <a href="../../db4-devel-4.7.25/api_cxx/env_set_flags.html#DB_TIME_NOTGRANTED">DB_TIME_NOTGRANTED</a> configuration flag has
been specified.
The <a href="../../db4-devel-4.7.25/api_cxx/except_class.html">DbException</a> errno value is set to DB_LOCKNOTGRANTED.
The get_op method returns 0 when <a href="../../db4-devel-4.7.25/api_cxx/lock_get.html">DbEnv::lock_get</a> was called,
and returns the op for the failed DB_LOCKREQ when
<a href="../../db4-devel-4.7.25/api_cxx/lock_vec.html">DbEnv::lock_vec</a> was called.
The get_mode method returns the mode parameter when
<a href="../../db4-devel-4.7.25/api_cxx/lock_get.html">DbEnv::lock_get</a> was called, and returns the mode for the failed
DB_LOCKREQ when <a href="../../db4-devel-4.7.25/api_cxx/lock_vec.html">DbEnv::lock_vec</a> was called.
The get_obj method returns the mode parameter when
returns the object parameter when <a href="../../db4-devel-4.7.25/api_cxx/lock_get.html">DbEnv::lock_get</a> was called,
and returns the object for the failed DB_LOCKREQ when
<a href="../../db4-devel-4.7.25/api_cxx/lock_vec.html">DbEnv::lock_vec</a> was called.
The <a href="../../db4-devel-4.7.25/api_cxx/dbt_class.html">Dbt</a> pointer may or may not refer to valid memory, depending on
whether the <a href="../../db4-devel-4.7.25/api_cxx/dbt_class.html">Dbt</a> used in the call to the failed <a href="../../db4-devel-4.7.25/api_cxx/lock_get.html">DbEnv::lock_get</a> or
<a href="../../db4-devel-4.7.25/api_cxx/lock_vec.html">DbEnv::lock_vec</a> method is still in scope and has not been deleted.
The get_lock method returns NULL when <a href="../../db4-devel-4.7.25/api_cxx/lock_get.html">DbEnv::lock_get</a> was
called, and returns the lock in the failed DB_LOCKREQ
when <a href="../../db4-devel-4.7.25/api_cxx/lock_vec.html">DbEnv::lock_vec</a> was called.
The get_index method returns -1 when <a href="../../db4-devel-4.7.25/api_cxx/lock_get.html">DbEnv::lock_get</a> was
called, and returns the index of the failed DB_LOCKREQ when
<a href="../../db4-devel-4.7.25/api_cxx/lock_vec.html">DbEnv::lock_vec</a> was called.
</tt>
<table width="100%"><tr><td> </td><td align=right>
<a href="../../db4-devel-4.7.25/api_cxx/api_core.html"><img src="../../db4-devel-4.7.25/images/api.gif" alt="API"></a><a href="../../db4-devel-4.7.25/ref/toc.html"><img src="../../db4-devel-4.7.25/images/ref.gif" alt="Ref"></a>
</td></tr></table>
Copyright (c) 1996,2008 Oracle. All rights reserved.
</body>
</html>

Back to File Manager