本文整理汇总了C++中client::Context类的典型用法代码示例。如果您正苦于以下问题:C++ Context类的具体用法?C++ Context怎么用?C++ Context使用的例子?那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了Context类的12个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。
示例1:
const char *ourgetns() {
Client *c = currentClient.get();
if ( ! c )
return "";
Client::Context* cc = c->getContext();
return cc ? cc->ns() : "";
}
示例2: prefix
/* db - database name
path - db directory
*/
/*static*/ void Database::closeDatabase( const char *db, const string& path ) {
assertInWriteLock();
Client::Context * ctx = cc().getContext();
assert( ctx );
assert( ctx->inDB( db , path ) );
Database *database = ctx->db();
assert( database->name == db );
oplogCheckCloseDatabase( database ); // oplog caches some things, dirty its caches
if( BackgroundOperation::inProgForDb(db) ) {
log() << "warning: bg op in prog during close db? " << db << endl;
}
/* important: kill all open cursors on the database */
string prefix(db);
prefix += '.';
ClientCursor::invalidate(prefix.c_str());
NamespaceDetailsTransient::clearForPrefix( prefix.c_str() );
dbHolder.erase( db, path );
ctx->clear();
delete database; // closes files
}
示例3: expressionParserWhereCallbackReal
StatusWithMatchExpression expressionParserWhereCallbackReal(const BSONElement& where) {
if ( !haveClient() )
return StatusWithMatchExpression( ErrorCodes::BadValue, "no current client needed for $where" );
Client::Context* context = cc().getContext();
if ( !context )
return StatusWithMatchExpression( ErrorCodes::BadValue, "no context in $where parsing" );
const char* ns = context->ns();
if ( !ns )
return StatusWithMatchExpression( ErrorCodes::BadValue, "no ns in $where parsing" );
if ( !globalScriptEngine )
return StatusWithMatchExpression( ErrorCodes::BadValue, "no globalScriptEngine in $where parsing" );
auto_ptr<WhereMatchExpression> exp( new WhereMatchExpression() );
if ( where.type() == String || where.type() == Code ) {
Status s = exp->init( ns, where.valuestr(), BSONObj() );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( exp.release() );
}
if ( where.type() == CodeWScope ) {
Status s = exp->init( ns,
where.codeWScopeCode(),
BSONObj( where.codeWScopeScopeDataUnsafe() ) );
if ( !s.isOK() )
return StatusWithMatchExpression( s );
return StatusWithMatchExpression( exp.release() );
}
return StatusWithMatchExpression( ErrorCodes::BadValue, "$where got bad type" );
}
示例4: getDbContext
string getDbContext() {
stringstream ss;
Client * c = currentClient.get();
if ( c ) {
Client::Context * cx = c->getContext();
if ( cx ) {
Database *database = cx->db();
if ( database ) {
ss << database->name() << ' ';
ss << cx->ns() << ' ';
}
}
}
return ss.str();
}
示例5: build
Status IndexBuilder::build(TransactionExperiment* txn,
Client::Context& context ) const {
string ns = _index["ns"].String();
Database* db = context.db();
Collection* c = db->getCollection( ns );
if ( !c ) {
c = db->getOrCreateCollection( ns );
verify(c);
}
// Show which index we're building in the curop display.
context.getClient()->curop()->setQuery(_index);
Status status = c->getIndexCatalog()->createIndex( txn,
_index,
true,
IndexCatalog::SHUTDOWN_LEAVE_DIRTY );
if ( status.code() == ErrorCodes::IndexAlreadyExists )
return Status::OK();
return status;
}
示例6: build
Status IndexBuilder::build( Client::Context& context ) const {
string ns = _index["ns"].String();
Database* db = context.db();
Collection* c = db->getCollection( ns );
if ( !c ) {
c = db->getOrCreateCollection( ns );
verify(c);
}
Status status = c->getIndexCatalog()->createIndex( _index,
true,
IndexCatalog::SHUTDOWN_LEAVE_DIRTY );
if ( status.code() == ErrorCodes::IndexAlreadyExists )
return Status::OK();
return status;
}
示例7: _logOp
/* we write to local.opload.$main:
{ ts : ..., op: ..., ns: ..., o: ... }
ts: an OpTime timestamp
op:
"i" insert
"u" update
"d" delete
"c" db cmd
"db" declares presence of a database (ns is set to the db name + '.')
"n" no op
logNS - e.g. "local.oplog.$main"
bb:
if not null, specifies a boolean to pass along to the other side as b: param.
used for "justOne" or "upsert" flags on 'd', 'u'
first: true
when set, indicates this is the first thing we have logged for this database.
thus, the slave does not need to copy down all the data when it sees this.
*/
static void _logOp(const char *opstr, const char *ns, const char *logNS, const BSONObj& obj, BSONObj *o2, bool *bb, const OpTime &ts ) {
if ( strncmp(ns, "local.", 6) == 0 ){
if ( strncmp(ns, "local.slaves", 12) == 0 ){
resetSlaveCache();
}
return;
}
DEV assertInWriteLock();
Client::Context context;
/* we jump through a bunch of hoops here to avoid copying the obj buffer twice --
instead we do a single copy to the destination position in the memory mapped file.
*/
BSONObjBuilder b;
b.appendTimestamp("ts", ts.asDate());
b.append("op", opstr);
b.append("ns", ns);
if ( bb )
b.appendBool("b", *bb);
if ( o2 )
b.append("o2", *o2);
BSONObj partial = b.done();
int posz = partial.objsize();
int len = posz + obj.objsize() + 1 + 2 /*o:*/;
Record *r;
if ( strncmp( logNS, "local.", 6 ) == 0 ) { // For now, assume this is olog main
if ( localOplogMainDetails == 0 ) {
Client::Context ctx("local.", dbpath, 0, false);
localOplogDB = ctx.db();
localOplogMainDetails = nsdetails(logNS);
}
Client::Context ctx( "" , localOplogDB, false );
r = theDataFileMgr.fast_oplog_insert(localOplogMainDetails, logNS, len);
} else {
Client::Context ctx( logNS, dbpath, 0, false );
assert( nsdetails( logNS ) );
r = theDataFileMgr.fast_oplog_insert( nsdetails( logNS ), logNS, len);
}
char *p = r->data;
memcpy(p, partial.objdata(), posz);
*((unsigned *)p) += obj.objsize() + 1 + 2;
p += posz - 1;
*p++ = (char) Object;
*p++ = 'o';
*p++ = 0;
memcpy(p, obj.objdata(), obj.objsize());
p += obj.objsize();
*p = EOO;
if ( logLevel >= 6 ) {
BSONObj temp(r);
log( 6 ) << "logging op:" << temp << endl;
}
context.getClient()->setLastOp( ts );
}
示例8: _logOpOld
/* we write to local.opload.$main:
{ ts : ..., op: ..., ns: ..., o: ... }
ts: an OpTime timestamp
op:
"i" insert
"u" update
"d" delete
"c" db cmd
"db" declares presence of a database (ns is set to the db name + '.')
"n" no op
logNS - where to log it. 0/null means "local.oplog.$main".
bb:
if not null, specifies a boolean to pass along to the other side as b: param.
used for "justOne" or "upsert" flags on 'd', 'u'
first: true
when set, indicates this is the first thing we have logged for this database.
thus, the slave does not need to copy down all the data when it sees this.
note this is used for single collection logging even when --replSet is enabled.
*/
static void _logOpOld(const char *opstr, const char *ns, const char *logNS, const BSONObj& obj, BSONObj *o2, bool *bb ) {
DEV assertInWriteLock();
static BufBuilder bufbuilder(8*1024);
if ( strncmp(ns, "local.", 6) == 0 ) {
if ( strncmp(ns, "local.slaves", 12) == 0 ) {
resetSlaveCache();
}
return;
}
const OpTime ts = OpTime::now();
Client::Context context;
/* we jump through a bunch of hoops here to avoid copying the obj buffer twice --
instead we do a single copy to the destination position in the memory mapped file.
*/
bufbuilder.reset();
BSONObjBuilder b(bufbuilder);
b.appendTimestamp("ts", ts.asDate());
b.append("op", opstr);
b.append("ns", ns);
if ( bb )
b.appendBool("b", *bb);
if ( o2 )
b.append("o2", *o2);
BSONObj partial = b.done(); // partial is everything except the o:... part.
int po_sz = partial.objsize();
int len = po_sz + obj.objsize() + 1 + 2 /*o:*/;
Record *r;
if( logNS == 0 ) {
logNS = "local.oplog.$main";
if ( localOplogMainDetails == 0 ) {
Client::Context ctx( logNS , dbpath, 0, false);
localDB = ctx.db();
assert( localDB );
localOplogMainDetails = nsdetails(logNS);
assert( localOplogMainDetails );
}
Client::Context ctx( logNS , localDB, false );
r = theDataFileMgr.fast_oplog_insert(localOplogMainDetails, logNS, len);
}
else {
Client::Context ctx( logNS, dbpath, 0, false );
assert( nsdetails( logNS ) );
// first we allocate the space, then we fill it below.
r = theDataFileMgr.fast_oplog_insert( nsdetails( logNS ), logNS, len);
}
append_O_Obj(r->data, partial, obj);
context.getClient()->setLastOp( ts.asDate() );
if ( logLevel >= 6 ) {
BSONObj temp(r);
log( 6 ) << "logging op:" << temp << endl;
}
}
示例9: ns
virtual ~Base() {
OperationContextImpl txn;
if ( !nsd() )
return;
_context.db()->dropCollection( &txn, ns() );
}
示例10: Base
Base() : lk(ns()), _context( ns() ) {
_database = _context.db();
_collection = _database->getCollection( ns() );
if ( _collection ) {
_database->dropCollection( &_txn, ns() );
}
_collection = _database->createCollection( &_txn, ns() );
addIndex( fromjson( "{\"a\":1}" ) );
}
示例11: db
Database* db() const {
return _context.db();
}
示例12: ns
virtual ~Base() {
DurTransaction txn;
if ( !nsd() )
return;
_context.db()->dropCollection( &txn, ns() );
}