wrench::FileRegistryService Class Reference

A file registry service (a.k.a. replica catalog) that holds a database of which files are available at which storage services. Specifically, the database holds a set of <file, storage service> entries. A WMS can add, lookup, and remove entries at will from this database. More...

#include <FileRegistryService.h>

Inheritance diagram for wrench::FileRegistryService:

Public Member Functions
	FileRegistryService (std::string hostname, std::map< std::string, std::string > property_list={}, std::map< std::string, double > messagepayload_list={})
	Constructor. More...
void	addEntry (WorkflowFile *file, std::shared_ptr< FileLocation > location)
	Add an entry. More...
std::set< std::shared_ptr< FileLocation > >	lookupEntry (WorkflowFile *file)
	Lookup entries for a file. More...
std::map< double, std::shared_ptr< FileLocation > >	lookupEntry (WorkflowFile *file, std::string reference_host, std::shared_ptr< NetworkProximityService > network_proximity_service)
	Lookup entries for a file, including for each entry a network distance from a reference host (as determined by a network proximity service) More...
void	removeEntry (WorkflowFile *file, std::shared_ptr< FileLocation > location)
	Remove an entry. More...
Public Member Functions inherited from wrench::Service
void	assertServiceIsUp ()
	Throws an exception if the service is not up. More...
std::string	getHostname ()
	Get the name of the host on which the service is / will be running. More...
double	getNetworkTimeoutValue ()
	Returns the service's network timeout value. More...
bool	getPropertyValueAsBoolean (std::string)
	Get a property of the Service as a boolean. More...
double	getPropertyValueAsDouble (std::string)
	Get a property of the Service as a double. More...
std::string	getPropertyValueAsString (std::string)
	Get a property of the Service as a string. More...
unsigned long	getPropertyValueAsUnsignedLong (std::string)
	Get a property of the Service as an unsigned long. More...
bool	isUp ()
	Returns true if the service is UP, false otherwise. More...
void	resume ()
	Resume the service. More...
void	setNetworkTimeoutValue (double value)
	Sets the service's network timeout value. More...
void	start (std::shared_ptr< Service > this_service, bool daemonize, bool auto_restart)
	Start the service. More...
virtual void	stop ()
	Synchronously stop the service (does nothing if the service is already stopped) More...
void	suspend ()
	Suspend the service.

Detailed Description

A file registry service (a.k.a. replica catalog) that holds a database of which files are available at which storage services. Specifically, the database holds a set of <file, storage service> entries. A WMS can add, lookup, and remove entries at will from this database.

Constructor & Destructor Documentation

FileRegistryService()

wrench::FileRegistryService::FileRegistryService ( std::string  hostname, std::map< std::string, std::string >  property_list = {}, std::map< std::string, double >  messagepayload_list = {}  )

explicit

Constructor.

Parameters

hostname	the hostname on which to start the service
property_list	a property list ({} means "use all defaults")
messagepayload_list	a message payload list ({} means "use all defaults")

Member Function Documentation

addEntry()

void wrench::FileRegistryService::addEntry	(	WorkflowFile *	file,
		std::shared_ptr< FileLocation >	location
	)

Add an entry.

Parameters

file	a file
location	a file location

Exceptions

WorkflowExecutionException
std::invalid_argument
std::runtime_error

lookupEntry() [1/2]

std::set< std::shared_ptr< FileLocation > > wrench::FileRegistryService::lookupEntry

(

WorkflowFile *

file

)

Lookup entries for a file.

Parameters

file	the file to lookup

Returns

The list locations for the file

Exceptions

WorkflowExecutionException
std::invalid_argument
std::runtime_error

lookupEntry() [2/2]

std::map< double, std::shared_ptr< FileLocation > > wrench::FileRegistryService::lookupEntry	(	WorkflowFile *	file,
		std::string	reference_host,
		std::shared_ptr< NetworkProximityService >	network_proximity_service
	)

Lookup entries for a file, including for each entry a network distance from a reference host (as determined by a network proximity service)

Parameters

file	the file to lookup
reference_host	reference host from which network proximity values are to be measured
network_proximity_service	the network proximity service to use

Returns

a map of <distance , file location> pairs

removeEntry()

void wrench::FileRegistryService::removeEntry	(	WorkflowFile *	file,
		std::shared_ptr< FileLocation >	location
	)

Remove an entry.

Parameters

file	a file
location	a file location

Exceptions

WorkflowExecutionException
std::invalid_argument
std::runtime_error

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

• FileRegistryService.h
• FileRegistryService.cpp