joedb::Client_Lock Class Reference

Lock object that allows writing to a database managed by a joedb::Client. More...

#include <joedb/concurrency/Writable_Client.h>

Inheritance diagram for joedb::Client_Lock:

Collaboration diagram for joedb::Client_Lock:

Public Member Functions
	Client_Lock (Writable_Client &client)
	Client_Lock (const Client_Lock &)=delete
Client_Lock &	operator= (const Client_Lock &)=delete
void	do_checkpoint ()
	Checkpoint current journal, but do not push yet.
void	push_if_ahead ()
	Push if the journal checkpoint is ahead of the connection checkpoint.
void	checkpoint_and_push ()
	Checkpoint current journal, and push to the connection.
void	checkpoint_and_push_unlock ()
	Confirm the transaction right before lock destruction.
void	unlock ()
	Cancel the transaction right before lock destruction.
	~Client_Lock ()
	The destructor unlocks the connection if necessary.

Protected Attributes
Writable_Client &	client
const Journal_Lock	journal_lock
bool	locked

Detailed Description

At the end of the life of this object, right before destruction, you should call either unlock to cancel the transaction, or push_unlock to confirm it. If you fail to do so, the destructor will call unlock. But calling unlock explicitly is better, if possible, because it can throw exceptions, unlike the destructor.

Definition at line 172 of file Writable_Client.h.

Constructor & Destructor Documentation

Client_Lock() [1/2]

joedb::Client_Lock::Client_Lock ( Writable_Client &  client )

inline

Definition at line 180 of file Writable_Client.h.

Client_Lock() [2/2]

joedb::Client_Lock::Client_Lock ( const Client_Lock &  )

delete

~Client_Lock()

joedb::Client_Lock::~Client_Lock ( )

inline

Definition at line 243 of file Writable_Client.h.

Member Function Documentation

checkpoint_and_push()

void joedb::Client_Lock::checkpoint_and_push ( )

inline

Unlike push_unlock, you can call this function multiple times during the life of the lock.

Definition at line 212 of file Writable_Client.h.

checkpoint_and_push_unlock()

void joedb::Client_Lock::checkpoint_and_push_unlock ( )

inline

Destruction should happen right after this function. Do not call any other member function after this one.

Definition at line 223 of file Writable_Client.h.

do_checkpoint()

void joedb::Client_Lock::do_checkpoint ( )

inline

Definition at line 192 of file Writable_Client.h.

operator=()

Client_Lock & joedb::Client_Lock::operator= ( const Client_Lock &  )

delete

push_if_ahead()

void joedb::Client_Lock::push_if_ahead ( )

inline

This function keeps the connection locked

Definition at line 201 of file Writable_Client.h.

unlock()

void joedb::Client_Lock::unlock ( )

inline

Destruction should happen right after this function. Do not call any other member function after this one.

Definition at line 235 of file Writable_Client.h.

Member Data Documentation

client

Writable_Client& joedb::Client_Lock::client

protected

Definition at line 175 of file Writable_Client.h.

journal_lock

const Journal_Lock joedb::Client_Lock::journal_lock

protected

Definition at line 176 of file Writable_Client.h.

locked

bool joedb::Client_Lock::locked

protected

Definition at line 177 of file Writable_Client.h.

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

• /home/rcoulom/repos/joedb/src/joedb/concurrency/Writable_Client.h