mongo::ScopedConn Class Reference

#include <connections.h>

List of all members.

Classes
struct	X
Public Member Functions
unsigned long long	count (const string &ns)
BSONObj	findOne (const string &ns, const Query &q, const BSONObj *fieldsToReturn=0, int queryOptions=0)
bool	runCommand (const string &dbname, const BSONObj &cmd, BSONObj &info, int options=0)
	ScopedConn (string hostport)
void	setTimeout (double to)
	~ScopedConn ()
Private Types
typedef map< string, ScopedConn::X * >	M
Private Member Functions
DBClientConnection *	conn ()
Private Attributes
auto_ptr< scoped_lock >	connLock
struct mongo::ScopedConn::X *	x
Static Private Attributes
static M &	_map
static mongo::mutex	mapMutex

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Detailed Description

here we keep a single connection (with reconnect) for a set of hosts, one each, and allow one user at a time per host. if in use already for that host, we block. so this is an easy way to keep a 1-deep pool of connections that many threads can share.

thread-safe.

Example: { ScopedConn c("foo.acme.com:9999"); c->runCommand(...); }

throws exception on connect error (but fine to try again later with a new scopedconn object for same host).

Definition at line 43 of file connections.h.

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Member Typedef Documentation

typedef map<string,ScopedConn::X*> mongo::ScopedConn::M [private]

Definition at line 77 of file connections.h.

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Constructor & Destructor Documentation

mongo::ScopedConn::ScopedConn

(

string

hostport

)

[inline]

throws assertions if connect failure etc.

Definition at line 82 of file connections.h.

mongo::ScopedConn::~ScopedConn

(

)

[inline]

Definition at line 111 of file connections.h.

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Member Function Documentation

DBClientConnection* mongo::ScopedConn::conn

(

)

[inline, private]

Definition at line 79 of file connections.h.

unsigned long long mongo::ScopedConn::count

(

const string &

ns

)

[inline]

Definition at line 57 of file connections.h.

BSONObj mongo::ScopedConn::findOne	(	const string &	ns,
		const Query &	q,
		const BSONObj *	fieldsToReturn = 0,
		int	queryOptions = 0
	)			[inline]

Definition at line 60 of file connections.h.

bool mongo::ScopedConn::runCommand	(	const string &	dbname,
		const BSONObj &	cmd,
		BSONObj &	info,
		int	options = 0
	)			[inline]

Definition at line 54 of file connections.h.

void mongo::ScopedConn::setTimeout

(

double

to

)

[inline]

Definition at line 63 of file connections.h.

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Member Data Documentation

M& mongo::ScopedConn::_map [static, private]

Definition at line 78 of file connections.h.

auto_ptr<scoped_lock> mongo::ScopedConn::connLock [private]

Definition at line 68 of file connections.h.

mongo::mutex mongo::ScopedConn::mapMutex [static, private]

Definition at line 69 of file connections.h.

struct mongo::ScopedConn::X * mongo::ScopedConn::x [private]

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The documentation for this class was generated from the following file:

• connections.h