bool AuthzManagerExternalStateMongos::tryAcquireAuthzUpdateLock(const StringData& why) {
boost::lock_guard<boost::mutex> lkLocal(_distLockGuard);
if (_authzDataUpdateLock.get()) {
return false;
}
// Temporarily put into an auto_ptr just in case there is an exception thrown during
// lock acquisition.
std::auto_ptr<ScopedDistributedLock> lockHolder(new ScopedDistributedLock(
configServer.getConnectionString(), "authorizationData"));
lockHolder->setLockMessage(why.toString());
std::string errmsg;
if (!lockHolder->acquire(_authzUpdateLockAcquisitionTimeoutMillis, &errmsg)) {
warning() <<
"Error while attempting to acquire distributed lock for user modification: " <<
errmsg << endl;
return false;
}
_authzDataUpdateLock.reset(lockHolder.release());
return true;
}
void AuthzManagerExternalStateMongos::releaseAuthzUpdateLock() {
boost::lock_guard<boost::mutex> lkLocal(_distLockGuard);
_authzDataUpdateLock.reset();
}
