Hypertable::StatusPersister Class Reference

Persists program status information to disk. More...

#include <StatusPersister.h>

Collaboration diagram for Hypertable::StatusPersister:

Static Public Member Functions
static void	set (const Status &status, std::vector< std::string > additional_lines)
	Sets persistent status. More...
static void	get (Status &status)
	Gets persistent status. More...

Static Private Member Functions
static void	initialize ()
	Initializes variables. More...

Static Private Attributes
static std::mutex	ms_mutex
	Mutex for serializaing access to members More...
static std::string	ms_fname
	Name of persistent status file. More...
static Status	ms_status
	Current persistent status. More...

Detailed Description

Persists program status information to disk.

Definition at line 43 of file StatusPersister.h.

Member Function Documentation

void StatusPersister::get ( Status &  status )

static

Gets persistent status.

If ms_fname is empty, calls initialize(). Then populates status with ms_status.

Parameters

status

Program status to persist

Definition at line 135 of file StatusPersister.cc.

void StatusPersister::initialize ( )

staticprivate

Initializes variables.

This function sets ms_fname to $HT_HOME/run/STATUS.<program_name> and if the file exists, parses it and initializes ms_status with the last entry.

Definition at line 142 of file StatusPersister.cc.

void StatusPersister::set ( const Status &  status, std::vector< std::string >  additional_lines  )

static

Sets persistent status.

If ms_fname is empty, calls initialize(), then creates a log entry and writes it to ms_fname.

Parameters

status	Program status to persist
additional_lines	Additional log entry lines

Prior to writing the entry, if ms_fname does not exist, a comment header is written to the file. The format of the status entry is as follows:

WARNING - Corruption encountered in commit log file /hypertable/servers/rs1/log/user/0
  Time 2025-02-03 16:36:00
  HYPERTABLE block compressor bad block header
  Header checksum mismatch: 19262 (computed) != 23614 (stored)
  File archived to /hypertable/backup/hypertable/servers/rs1/log/user/0

The first line is the status information from status, the second line contain the current time, and the subsequent lines are additional_lines.

Definition at line 82 of file StatusPersister.cc.

Member Data Documentation

std::string StatusPersister::ms_fname

staticprivate

Name of persistent status file.

Definition at line 71 of file StatusPersister.h.

std::mutex StatusPersister::ms_mutex

staticprivate

Mutex for serializaing access to members

Definition at line 68 of file StatusPersister.h.

Status StatusPersister::ms_status

staticprivate

Current persistent status.

Definition at line 74 of file StatusPersister.h.

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

• /home/doug/src/hypertable/src/cc/Common/StatusPersister.h
• /home/doug/src/hypertable/src/cc/Common/StatusPersister.cc