<!--$Id: lockng_class.so,v 1.14 2004/08/13 03:38:57 bostic Exp $--> <!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> <!--See the file LICENSE for redistribution information.--> <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> <b>DbLockNotGrantedException</b> </td> <td align=right> <a href="../api_cxx/api_core.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> <b><pre> #include <db_cxx.h> <p> 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></b> <hr size=1 noshade> <b>Description: DbLockNotGrantedException</b> <p>This information describes the DbLockNotGrantedException class and how it is used by the various Db* classes.</p> <p>A DbLockNotGrantedException is thrown when a lock requested using the <a href="../api_cxx/lock_get.html">DbEnv::lock_get</a> or <a href="../api_cxx/lock_vec.html">DbEnv::lock_vec</a> methods, where the <a href="../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.</p> <p>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.</p> <p>Additionally, DbLockNotGrantedException is thrown when lock or transaction timeouts have been configured, a database operation has timed out, and the <a href="../api_cxx/env_set_flags.html#DB_TIME_NOTGRANTED">DB_TIME_NOTGRANTED</a> configuration flag has been specified.</p> <p>The <a href="../api_cxx/except_class.html">DbException</a> errno value is set to DB_LOCKNOTGRANTED.</p> <p>The <b>get_op</b> method returns 0 when <a href="../api_cxx/lock_get.html">DbEnv::lock_get</a> was called, and returns the <b>op</b> for the failed DB_LOCKREQ when <a href="../api_cxx/lock_vec.html">DbEnv::lock_vec</a> was called.</p> <p>The <b>get_mode</b> method returns the <b>mode</b> parameter when <a href="../api_cxx/lock_get.html">DbEnv::lock_get</a> was called, and returns the <b>mode</b> for the failed DB_LOCKREQ when <a href="../api_cxx/lock_vec.html">DbEnv::lock_vec</a> was called.</p> <p>The <b>get_obj</b> method returns the <b>mode</b> parameter when returns the <b>object</b> parameter when <a href="../api_cxx/lock_get.html">DbEnv::lock_get</a> was called, and returns the <b>object</b> for the failed DB_LOCKREQ when <a href="../api_cxx/lock_vec.html">DbEnv::lock_vec</a> was called. The <a href="../api_cxx/dbt_class.html">Dbt</a> pointer may or may not refer to valid memory, depending on whether the <a href="../api_cxx/dbt_class.html">Dbt</a> used in the call to the failed <a href="../api_cxx/lock_get.html">DbEnv::lock_get</a> or <a href="../api_cxx/lock_vec.html">DbEnv::lock_vec</a> method is still in scope and has not been deleted.</p> <p>The <b>get_lock</b> method returns NULL when <a href="../api_cxx/lock_get.html">DbEnv::lock_get</a> was called, and returns the <b>lock</b> in the failed DB_LOCKREQ when <a href="../api_cxx/lock_vec.html">DbEnv::lock_vec</a> was called.</p> <p>The <b>get_index</b> method returns -1 when <a href="../api_cxx/lock_get.html">DbEnv::lock_get</a> was called, and returns the index of the failed DB_LOCKREQ when <a href="../api_cxx/lock_vec.html">DbEnv::lock_vec</a> was called.</p> </tt> <table width="100%"><tr><td><br></td><td align=right> <a href="../api_cxx/api_core.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>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> </body> </html>