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<h1>DbLockNotGrantedException</h1>
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<h3><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></h3>
<h1>Description</h1>
<p>This manual page describes the DbLockNotGrantedException class and
how it is used by the various Db* classes.
<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> option was specified), or by any <a href="../api_cxx/db_class.html">Db</a>
operation performed in the context of a transaction begun using the
<a href="../api_cxx/txn_begin.html#DB_TXN_NOWAIT">DB_TXN_NOWAIT</a> option, is unable to be granted immediately.
<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>The <b>get_mode</b> method returns the <b>mode</b> argument 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>The <b>get_obj</b> method returns the <b>obj</b> argument when
<a href="../api_cxx/lock_get.html">DbEnv::lock_get</a> was called, and returns the <b>obj</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>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>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.
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