CPCD Class Reference

Manages processes, letting them be controlled with a TCP connection. More...

#include <CPCD.hpp>

Collaboration diagram for CPCD:

Classes
class	Monitor
	Starts and stops processes as needed. More...
class	Process
	Manages a process. More...
class	RequestStatus
	Describes the status of a client request. More...

Public Member Functions
	CPCD ()
	Constructs a CPCD object.
	~CPCD ()
	Destroys a CPCD object, but does not stop the processes it manages.
bool	defineProcess (RequestStatus *rs, Process *arg)
bool	undefineProcess (RequestStatus *rs, int id)
bool	startProcess (RequestStatus *rs, int id)
bool	stopProcess (RequestStatus *rs, int id)
bool	listProcesses (RequestStatus *rs, MutexVector< const char * > &)
bool	saveProcessList ()
bool	loadProcessList ()
MutexVector< Process * > *	getProcessList ()

Public Attributes
bool	loadingProcessList
MutexVector< Process * >	m_processes

Friends
class	Process

Detailed Description

Manages processes, letting them be controlled with a TCP connection.

The class implementing the Cluster Process Control Daemon

Definition at line 83 of file CPCD.hpp.

Member Function Documentation

bool CPCD::defineProcess	(	RequestStatus *	rs,
		Process *	arg
	)

Adds a Process to the CPCDs list of managed Processes.

Note

The process will not be started until it is explicitly marked as running with CPCD::startProcess().

Returns

• true if the addition was successful,
• false if not
• RequestStatus will be filled in with a suitable error if an error occured.

Definition at line 73 of file CPCD.cpp.

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MutexVector< CPCD::Process * > * CPCD::getProcessList

(

)

Returns the list of processes

Definition at line 392 of file CPCD.cpp.

bool CPCD::listProcesses	(	RequestStatus *	rs,
		MutexVector< const char * > &
	)

Generates a list of processes, and sends them to the CPCD client

bool CPCD::loadProcessList

(

)

Loads the list of Processes and their status from the configuration file.

Note

This function should only be called when the CPCD is starting, calling it at other times will cause unspecified behaviour.

Definition at line 330 of file CPCD.cpp.

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bool CPCD::saveProcessList

(

)

Saves the list of Processes and their status to the configuration file. Called whenever the configuration is changed.

Interactive process should never be "restarted" on cpcd restart

Definition at line 248 of file CPCD.cpp.

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bool CPCD::startProcess	(	CPCD::RequestStatus *	rs,
		int	id
	)

Marks a Process for starting.

Note

The fact that a process has started does not mean it will actually start properly. This command only makes sure the CPCD will try to start it.

Returns

• true if the marking was successful
• false if not
• RequestStatus will be filled in with a suitable error if an error occured.

Definition at line 138 of file CPCD.cpp.

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bool CPCD::stopProcess	(	CPCD::RequestStatus *	rs,
		int	id
	)

Marks a Process for stopping.

Returns

• true if the marking was successful
• false if not
• The RequestStatus will be filled in with a suitable error if an error occured.

Definition at line 183 of file CPCD.cpp.

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bool CPCD::undefineProcess	(	CPCD::RequestStatus *	rs,
		int	id
	)

Removes a Process from the CPCD.

Note

A Process that is running cannot be removed.

Returns

• true if the removal was successful,
• false if not
• The RequestStatus will be filled in with a suitable error if an error occured.

Definition at line 104 of file CPCD.cpp.

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Member Data Documentation

bool CPCD::loadingProcessList

Set to true while the CPCD is reading the configuration file

Definition at line 354 of file CPCD.hpp.

MutexVector<Process *> CPCD::m_processes

The list of processes. Should not be used directly

Definition at line 372 of file CPCD.hpp.

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

• storage/ndb/src/cw/cpcd/CPCD.hpp
• storage/ndb/src/cw/cpcd/CPCD.cpp