Blocks requests until specific commit log has finished replaying. More...

#include <LogReplayBarrier.h>

Public Member Functions
void	set_root_complete ()
	Signals ROOT commit log replay has been completed. More...

void	set_metadata_complete ()
	Signals METADATA commit log replay has been completed. More...

void	set_system_complete ()
	Signals SYSTEM commit log replay has been completed. More...

void	set_user_complete ()
	Signals USER commit log replay has been completed. More...

bool	wait_for_root (ClockT::time_point deadline)
	Waits for ROOT commit log replay to complete. More...

bool	wait_for_metadata (ClockT::time_point deadline)
	Waits for METADATA commit log replay to complete. More...

bool	wait_for_system (ClockT::time_point deadline)
	Waits for SYSTEM commit log replay to complete. More...

bool	wait_for_user (ClockT::time_point deadline)
	Waits for USER commit log replay to complete. More...

bool	wait (ClockT::time_point deadline, const TableIdentifier &table, const RangeSpec &range)
	Waits for commit log replay to complete for range class defined by a given range. More...

bool	wait (ClockT::time_point deadline, const TableIdentifier &table)
	Waits for commit log replay to complete for log class defined by a given table. More...

bool	user_complete ()
	Checks if replay of USER commit log is complete. More...

Private Attributes
std::mutex	m_mutex
	Mutex to serialize concurrent access. More...

std::condition_variable	m_root_complete_cond
	Condition variable used to signal ROOT commit log replay complete. More...

std::condition_variable	m_metadata_complete_cond
	Condition variable used to signal METADATA commit log replay complete. More...

std::condition_variable	m_system_complete_cond
	Condition variable used to signal SYSTEM commit log replay complete. More...

std::condition_variable	m_user_complete_cond
	Condition variable used to signal USER commit log replay complete. More...

bool	m_root_complete {}
	Flag indicating if ROOT commit log replay is complete. More...

bool	m_metadata_complete {}
	Flag indicating if METADATA commit log replay is complete. More...

bool	m_system_complete {}
	Flag indicating if SYSTEM commit log replay is complete. More...

bool	m_user_complete {}
	Flag indicating if USER commit log replay is complete. More...

Detailed Description

Blocks requests until specific commit log has finished replaying.

Many operations require a certain class of ranges to be online before they can proceed. All ranges belong to one of the four following classes:

ROOT
METADATA
SYSTEM
USER

When the RangeServer starts up, all of the ranges in a given class are brought online at the same time. Each range class has an associated commit log and once the commit log has been replayed, the ranges are "flipped live". This class provides a mechanism for operations to block until commit log replay for dependent ranges is complete (and are therefore live). The range classes are flipped live (i.e. finished log replay) in the order in which they're listed above.

Definition at line 59 of file LogReplayBarrier.h.

Member Function Documentation

void LogReplayBarrier::set_metadata_complete ( )

Signals METADATA commit log replay has been completed.

Sets m_metadata_complete to true and signals m_metadata_complete_cond

Definition at line 36 of file LogReplayBarrier.cc.

void LogReplayBarrier::set_root_complete ( )

Signals ROOT commit log replay has been completed.

Sets m_root_complete to true and signals m_root_complete_cond

Definition at line 30 of file LogReplayBarrier.cc.

void LogReplayBarrier::set_system_complete ( )

Signals SYSTEM commit log replay has been completed.

Sets m_system_complete to true and signals m_system_complete_cond

Definition at line 42 of file LogReplayBarrier.cc.

void LogReplayBarrier::set_user_complete ( )

Signals USER commit log replay has been completed.

Sets m_user_complete to true and signals m_user_complete_cond

Definition at line 48 of file LogReplayBarrier.cc.

bool LogReplayBarrier::user_complete ( )

Checks if replay of USER commit log is complete.

Returns: true if USER commit log replay is complete, false otherwise

Definition at line 119 of file LogReplayBarrier.cc.

bool LogReplayBarrier::wait	(	ClockT::time_point	deadline,
		const TableIdentifier &	table,
		const RangeSpec &	range
	)

Waits for commit log replay to complete for range class defined by a given range.

This member function will perform a timed wait on the condition variable for the range class to which the given range belongs, defined by table and range. deadline is passed in as the timeout value.

Parameters

deadline	Absolute time representing wait deadline
table	Table identifier
range	Range specification

Returns: true if commit log replay completed before deadline, false if deadline reached before USER commit log replay completed.

Definition at line 91 of file LogReplayBarrier.cc.

bool LogReplayBarrier::wait	(	ClockT::time_point	deadline,
		const TableIdentifier &	table
	)

Waits for commit log replay to complete for log class defined by a given table.

This member function will perform a timed wait on the condition variable for the log class to which the given table belongs. deadline is passed in as the timeout value.

Parameters

deadline	Absolute time representing wait deadline
table	Table identifier

Returns: true if commit log replay completed before deadline, false if deadline reached before USER commit log replay completed.

Definition at line 108 of file LogReplayBarrier.cc.

bool LogReplayBarrier::wait_for_metadata ( ClockT::time_point deadline )

Waits for METADATA commit log replay to complete.

Performs a timed wait on m_metadata_complete_cond with deadline passed in as the timeout value.

Parameters

deadline Absolute time representing wait deadline

Returns: true if METADATA commit log replay completed before deadline, false if deadline reached before METADATA commit log replay completed.

Definition at line 63 of file LogReplayBarrier.cc.

bool LogReplayBarrier::wait_for_root ( ClockT::time_point deadline )

Waits for ROOT commit log replay to complete.

Performs a timed wait on m_root_complete_cond with deadline passed in as the timeout value.

Parameters

deadline Absolute time representing wait deadline

Returns: true if ROOT commit log replay completed before deadline, false if deadline reached before ROOT commit log replay completed.

Definition at line 54 of file LogReplayBarrier.cc.

bool LogReplayBarrier::wait_for_system ( ClockT::time_point deadline )

Waits for SYSTEM commit log replay to complete.

Performs a timed wait on m_system_complete_cond with deadline passed in as the timeout value.

Parameters

deadline Absolute time representing wait deadline

Returns: true if SYSTEM commit log replay completed before deadline, false if deadline reached before SYSTEM commit log replay completed.

Definition at line 72 of file LogReplayBarrier.cc.

bool LogReplayBarrier::wait_for_user ( ClockT::time_point deadline )

Waits for USER commit log replay to complete.

Performs a timed wait on m_user_complete_cond with deadline passed in as the timeout value.

Parameters

deadline Absolute time representing wait deadline

Returns: true if USER commit log replay completed before deadline, false if deadline reached before USER commit log replay completed.

Definition at line 81 of file LogReplayBarrier.cc.

Member Data Documentation

bool Hypertable::LogReplayBarrier::m_metadata_complete {}

private

Flag indicating if METADATA commit log replay is complete.

Definition at line 163 of file LogReplayBarrier.h.

std::condition_variable Hypertable::LogReplayBarrier::m_metadata_complete_cond

private

Condition variable used to signal METADATA commit log replay complete.

Definition at line 155 of file LogReplayBarrier.h.

std::mutex Hypertable::LogReplayBarrier::m_mutex

private

Mutex to serialize concurrent access.

Definition at line 151 of file LogReplayBarrier.h.

bool Hypertable::LogReplayBarrier::m_root_complete {}

private

Flag indicating if ROOT commit log replay is complete.

Definition at line 161 of file LogReplayBarrier.h.

std::condition_variable Hypertable::LogReplayBarrier::m_root_complete_cond

private

Condition variable used to signal ROOT commit log replay complete.

Definition at line 153 of file LogReplayBarrier.h.

bool Hypertable::LogReplayBarrier::m_system_complete {}

private

Flag indicating if SYSTEM commit log replay is complete.

Definition at line 165 of file LogReplayBarrier.h.

std::condition_variable Hypertable::LogReplayBarrier::m_system_complete_cond

private

Condition variable used to signal SYSTEM commit log replay complete.

Definition at line 157 of file LogReplayBarrier.h.

bool Hypertable::LogReplayBarrier::m_user_complete {}

private

Flag indicating if USER commit log replay is complete.

Definition at line 167 of file LogReplayBarrier.h.

std::condition_variable Hypertable::LogReplayBarrier::m_user_complete_cond

private

Condition variable used to signal USER commit log replay complete.

Definition at line 159 of file LogReplayBarrier.h.

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

/home/doug/src/hypertable/src/cc/Hypertable/RangeServer/LogReplayBarrier.h
/home/doug/src/hypertable/src/cc/Hypertable/RangeServer/LogReplayBarrier.cc

Public Member Functions

Private Attributes

Detailed Description

Member Function Documentation

Member Data Documentation