TRestEventProcess Class Reference

Detailed Description

A base class for any REST event process.

One of the core classes of REST. Absract class from which all REST "event process classes" must derive. An event process in REST is an atomic operation on one single (input) event, potentially producing a different (output) event. Which type of (input/output) events will depent on the type of process. Processes can be tailored via metadata classes. All this needs to be defined in the inherited class. TRestEventProcess provides the basic structure (virtual functions)

---

RESTsoft - Software for Rare Event Searches with TPCs

History of developments:

2014-june: First concept. As part of conceptualization of previous REST code (REST v2) Igor G. Irastorza

2017-Aug: Major change: added for multi-thread capability Kaixiang Ni

---

Definition at line 37 of file TRestEventProcess.h.

#include <TRestEventProcess.h>

Inheritance diagram for TRestEventProcess:

Public Member Functions
virtual Bool_t	AddInputFile (const std::string &file)
bool	ApplyCut ()
virtual void	BeginOfEventProcess (TRestEvent *inputEvent=nullptr)
	Begin of event process, preparation work. Called right before ProcessEvent()
	ClassDefOverride (TRestEventProcess, 3)
virtual void	EndOfEventProcess (TRestEvent *inputEvent=nullptr)
	End of event process. Nothing to do. Called directly after ProcessEvent()
virtual void	EndProcess ()
	To be executed at the end of the run (outside event loop)
TRestAnalysisTree *	GetAnalysisTree () const
	Return the local analysis tree (dummy)
TCanvas *	GetCanvas () const
	Get canvas.
TRestAnalysisTree *	GetFullAnalysisTree ()
virtual RESTValue	GetInputEvent () const =0
	Get pointer to input event. Must be implemented in the derived class.
std::vector< std::string >	GetListOfAddedObservables ()
virtual RESTValue	GetOutputEvent () const =0
	Get pointer to output event. Must be implemented in the derived class.
virtual const char *	GetProcessName () const =0
TRestRun *	GetRunInfo () const
	Return the pointer of the hosting TRestRun object.
virtual Long64_t	GetTotalBytes () const
virtual Long64_t	GetTotalBytesRead () const
	Interface to external file reading, get the read bytes. To be implemented in external processes.
virtual void	InitFromConfigFile () override
	To make settings from rml file. This method must be implemented in the derived class.
virtual void	InitProcess ()
	To be executed at the beginning of the run (outside event loop)
Bool_t	isExternal () const
	Return whether this process is external process.
Int_t	LoadSectionMetadata () override
	This method does some preparation of xml section. More...
virtual void	NotifyAnalysisTreeReset ()
	In case the analysis tree is reset(switched to new file), some process needs to have action.
virtual Bool_t	OpenInputFiles (const std::vector< std::string > &files)
virtual TRestEvent *	ProcessEvent (TRestEvent *inputEvent)=0
	Process one event.
std::vector< std::string >	ReadObservables ()
void	RegisterAllObservables (Bool_t value=true)
virtual Bool_t	ResetEntry ()
void	SetAnalysisTree (TRestAnalysisTree *tree)
	Set analysis tree of this process, then add observables to it.
void	SetCanvasSize (Int_t x, Int_t y)
	Set canvas size.
void	SetFriendProcess (TRestEventProcess *p)
	Add friendly process to this process.
void	SetObservableValidation (bool validate)
void	SetParallelProcess (TRestEventProcess *p)
	Add parallel process to this process.
void	SetRunInfo (TRestRun *r)
	Set TRestRun for this process.
Bool_t	singleThreadOnly () const
	Return whether this process is single std::thread only.
	TRestEventProcess ()
	~TRestEventProcess ()
Public Member Functions inherited from TRestMetadata
void	AddLog (std::string log="", bool print=true)
	Add logs to messageBuffer.
void	DoNotStore ()
	If this method is called the metadata information will not be stored in disk.
TVector2	Get2DVectorParameterWithUnits (std::string parName, TVector2 defaultValue=TVector2(-1, -1))
TVector3	Get3DVectorParameterWithUnits (std::string parName, TVector3 defaultValue=TVector3(-1, -1, -1))
TString	GetCommit ()
	Returns the REST commit value stored in fCommit.
std::string	GetConfigBuffer ()
	Returns the config section of this class.
std::string	GetDataMemberValue (std::string memberName)
	Get the value of data member as string. More...
std::vector< std::string >	GetDataMemberValues (std::string memberName, Int_t precision=0)
	Get the value of datamember as a vector of strings. More...
TString	GetDataPath ()
	Returns a std::string with the path used for data storage.
Double_t	GetDblParameterWithUnits (std::string parName, Double_t defaultValue=PARAMETER_NOT_FOUND_DBL)
	Gets the value of the parameter name parName, after applying unit conversion. More...
Bool_t	GetError () const
	It returns true if an error was identified by a derived metadata class.
TString	GetErrorMessage ()
	Returns a std::string containing the error message.
TString	GetLibraryVersion ()
	Returns the REST libraty version stored in fLibraryVersion.
TString	GetMainDataPath ()
	Gets a std::string with the path used for data storage.
Int_t	GetNumberOfErrors () const
Int_t	GetNumberOfWarnings () const
std::string	GetParameter (std::string parName, TString defaultValue=PARAMETER_NOT_FOUND_STR)
	Returns corresponding REST Metadata parameter from multiple sources. More...
std::string	GetSectionName ()
	Returns the section name of this class, defined at the beginning of fSectionName.
TRestStringOutput::REST_Verbose_Level	GetVerboseLevel ()
	returns the verboselevel in type of REST_Verbose_Level enumerator
TString	GetVerboseLevelString ()
	returns the verbose level in type of TString More...
TString	GetVersion ()
	Returns the REST version stored in fVersion.
Int_t	GetVersionCode ()
UInt_t	GetVersionMajor () const
UInt_t	GetVersionMinor () const
UInt_t	GetVersionPatch () const
Bool_t	GetWarning () const
	It returns true if an error was identified by a derived metadata class.
TString	GetWarningMessage ()
	Returns a std::string containing the warning message.
virtual void	Initialize ()
	Making default settings.
TRestMetadata *	InstantiateChildMetadata (int index, std::string pattern="")
	This method will retrieve a new TRestMetadata instance of a child element of the present TRestMetadata instance based on the index given by argument, which defines the element order to be retrieved, 0 for first element found, 1 for the second element found, etc. More...
TRestMetadata *	InstantiateChildMetadata (std::string pattern="", std::string name="")
	This method will retrieve a new TRestMetadata instance of a child element of the present TRestMetadata instance based on the name given by argument. More...
Bool_t	isCleanState () const
Bool_t	isOfficialRelease () const
Int_t	LoadConfigFromBuffer ()
	Initialize data from a string element buffer. More...
Int_t	LoadConfigFromElement (TiXmlElement *eSectional, TiXmlElement *eGlobal, std::map< std::string, std::string > envs={})
	Main starter method. More...
Int_t	LoadConfigFromFile (const std::string &configFilename, const std::string &sectionName="")
	Give the file name, find out the corresponding section. Then call the main starter.
virtual void	Merge (const TRestMetadata &)
TRestMetadata &	operator= (const TRestMetadata &)
void	Print ()
	Implementing TObject::Print() method.
void	PrintConfigBuffer ()
	Print the config xml section stored in the class. More...
void	PrintMessageBuffer ()
	Print the buffered message.
virtual void	PrintMetadata ()
	Implemented it in the derived metadata class to print out specific metadata information. More...
void	PrintTimeStamp (Double_t timeStamp)
	Print the current time on local machine. More...
void	SetConfigFile (std::string configFilename)
	set config file path from external
void	SetError (std::string message="", bool print=true, int maxPrint=5)
	A metadata class may use this method to signal that something went wrong.
void	SetHostmgr (TRestManager *m)
	Set the host manager for this class.
void	SetSectionName (std::string sName)
	set the section name, clear the section content
void	SetVerboseLevel (TRestStringOutput::REST_Verbose_Level v)
	sets the verbose level
void	SetWarning (std::string message="", bool print=true, int maxPrint=5)
	A metadata class may use this method to signal that something went wrong.
void	Store ()
	If this method is called the metadata information will be stored in disk.
	TRestMetadata (const TRestMetadata &)
virtual void	UpdateMetadataMembers ()
	Method to allow implementation of specific metadata members updates at inherited classes.
virtual Int_t	Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0)
	overwriting the write() method with fStore considered
void	WriteConfigBuffer (std::string fName)
	Writes the config buffer to a file in append mode.
	~TRestMetadata ()
	TRestMetadata default destructor.

Protected Types
enum	REST_Process_Output { No_Output , Observable , Internal_Var , Full_Output }

Protected Member Functions
void	BeginPrintProcess ()
	[name, cut range]
void	CreateCanvas ()
	Create the canvas.
void	EndPrintProcess ()
TRestEventProcess *	GetFriend (const std::string &nameOrType)
TRestEventProcess *	GetFriendLive (const std::string &nameOrType)
template<class T >
T *	GetMetadata ()
	Get a metadata object from the host TRestRun. More...
TRestMetadata *	GetMetadata (const std::string &nameOrType)
size_t	GetNumberOfParallelProcesses () const
template<class T >
T	GetObservableValue (const std::string &name)
TRestEventProcess *	GetParallel (int i)
template<class T >
std::vector< T >	GetParallelDataMembers (T *member_of_process)
	Get a list of data members from parallel processes which is same to this process's certain data member. More...
template<class T >
void	SetObservableValue (const std::string &name, const T &value)
	Set observable value for AnalysisTree. More...
Protected Member Functions inherited from TRestMetadata
std::string	ElementToString (TiXmlElement *ele)
	Convert an TiXmlElement object to string. More...
TVector2	Get2DVectorParameterWithUnits (std::string parName, TiXmlElement *e, TVector2 defaultValue=TVector2(-1, -1))
TVector3	Get3DVectorParameterWithUnits (std::string parName, TiXmlElement *e, TVector3 defaultValue=TVector3(-1, -1, -1))
Double_t	GetDblParameterWithUnits (std::string parName, TiXmlElement *e, Double_t defaultVal=PARAMETER_NOT_FOUND_DBL)
TiXmlElement *	GetElement (std::string eleDeclare, TiXmlElement *e=nullptr)
	Get an xml element from a given parent element, according to its declaration.
TiXmlElement *	GetElementFromFile (std::string configFilename, std::string NameOrDecalre="")
	Open an xml encoded file and find its element. More...
TiXmlElement *	GetElementWithName (std::string eleDeclare, std::string eleName)
	Get an xml element from the default location, according to its declaration and its field "name".
TiXmlElement *	GetElementWithName (std::string eleDeclare, std::string eleName, TiXmlElement *e)
	Get an xml element from a given parent element, according to its declaration and its field "name".
std::string	GetFieldValue (std::string fieldName, std::string definition, size_t fromPosition=0)
	Gets field value in an xml element string by parsing it as TiXmlElement.
std::string	GetFieldValue (std::string parName, TiXmlElement *e)
	Returns the field value of an xml element which has the specified name. More...
std::string	GetKEYDefinition (std::string keyName)
	Gets the first key definition for keyName found inside buffer starting at fromPosition. More...
std::string	GetKEYDefinition (std::string keyName, size_t &Position)
std::string	GetKEYDefinition (std::string keyName, size_t &Position, std::string buffer)
std::string	GetKEYDefinition (std::string keyName, std::string buffer)
std::string	GetKEYStructure (std::string keyName)
	Gets the first key structure for keyName found inside buffer after fromPosition. More...
std::string	GetKEYStructure (std::string keyName, size_t &Position)
std::string	GetKEYStructure (std::string keyName, size_t &Position, std::string buffer)
std::string	GetKEYStructure (std::string keyName, size_t &Position, TiXmlElement *ele)
std::string	GetKEYStructure (std::string keyName, std::string buffer)
TiXmlElement *	GetNextElement (TiXmlElement *e)
	Get the next sibling xml element of this element, with same eleDeclare.
std::string	GetParameter (std::string parName, size_t &pos, std::string inputString)
	Returns the value for the parameter name parName found in inputString. More...
std::string	GetParameter (std::string parName, TiXmlElement *e, TString defaultValue=PARAMETER_NOT_FOUND_STR)
	Returns the value for the parameter named parName in the given section. More...
std::pair< std::string, std::string >	GetParameterAndUnits (std::string parname, TiXmlElement *e=nullptr)
	Returns the unit string of the given parameter of the given xml section. More...
std::map< std::string, std::string >	GetParametersList ()
	It retrieves a map of all parameter:value found in the metadata class.
TString	GetSearchPath ()
virtual void	InitFromRootFile ()
	Method called after the object is retrieved from root file.
void	ReadAllParameters ()
	Reflection methods, Set value of a datamember in class according to TRestMetadata::fElement. More...
void	ReadParametersList (std::map< std::string, std::string > &list)
	It reads a parameter list and associates it to its corresponding metadata member. par0 --> fPar0.
std::string	ReplaceConstants (const std::string buffer)
	Identifies "constants" in the input buffer, and replace them with corresponding value. More...
std::string	ReplaceVariables (const std::string buffer)
	Identifies environmental variable replacing marks in the input buffer, and replace them with corresponding value. More...
void	ReSetVersion ()
	Resets the version of TRestRun to REST_RELEASE. Only TRestRun is allowed to update version.
std::string	SearchFile (std::string filename)
	Search files in current directory and directories specified in "searchPath" section. More...
void	SetLibraryVersion (TString version)
	Set the library version of this metadata class.
TiXmlElement *	StringToElement (std::string definition)
	Parsing a string into TiXmlElement object. More...
	TRestMetadata ()
	TRestMetadata default constructor.
	TRestMetadata (const char *configFilename)
	constructor
void	UnSetVersion ()
	Resets the version of TRestRun to -1, in case the file is old REST file. Only TRestRun is allowed to update version.

Protected Attributes
TRestAnalysisTree *	fAnalysisTree = nullptr
TCanvas *	fCanvas = nullptr
	< Canvas for some viewer event
TVector2	fCanvasSize
	Canvas size.
std::vector< std::pair< std::string, TVector2 > >	fCuts
	Stores cut definitions. Any listed observables should be in the range. More...
bool	fDynamicObs = false
	It defines whether to use added observables only or all the observables appear in the code.
bool	fIsExternal = false
	It defines if the process reads event data from an external source.
std::map< std::string, int >	fObservablesDefined
	Stores the list of all the appeared process observables in the code. More...
std::map< std::string, int >	fObservablesUpdated
	Stores the list of process observables updated when processing this event.
bool	fReadOnly = false
	not used, keep for compatibility
TRestRun *	fRunInfo = nullptr
	< Pointer to TRestRun object where to find metadata.
bool	fSingleThreadOnly = false
bool	fValidateObservables = false
	It defines if observable names should be added to the validation list.
Protected Attributes inherited from TRestMetadata
std::string	configBuffer
	The buffer where the corresponding metadata section is stored. Filled only during Write()
std::string	fConfigFileName
	Full name of the rml file. More...
std::map< std::string, std::string >	fConstants
	Saving a list of rml constants. name-value std::pair. Constants are temporary for this class only.
TiXmlElement *	fElement
	Saving the sectional element together with global element.
TiXmlElement *	fElementGlobal
	Saving the global element, to be passed to the resident class, if necessary.
Bool_t	fError = false
	It can be used as a way to identify that something went wrong using SetError method.
TString	fErrorMessage = ""
	A std::string to store an optional error message through method SetError.
TRestManager *	fHostmgr
	All metadata classes can be initialized and managed by TRestManager.
Int_t	fNErrors = 0
	It counts the number of errors notified.
Int_t	fNWarnings = 0
	It counts the number of warnings notified.
std::string	fSectionName
	Section name given in the constructor of the derived metadata class.
Bool_t	fStore
	This variable is used to determine if the metadata structure should be stored in the ROOT file.
std::map< std::string, std::string >	fVariables
	Saving a list of rml variables. name-value std::pair.
TRestStringOutput::REST_Verbose_Level	fVerboseLevel
	Verbose level used to print debug info.
Bool_t	fWarning = false
	It can be used as a way to identify that something went wrong using SetWarning method.
TString	fWarningMessage = ""
	It can be used as a way to identify that something went wrong using SetWarning method.
std::string	messageBuffer
	The buffer to store the output message through TRestStringOutput in this class.
endl_t	RESTendl
	Termination flag object for TRestStringOutput.

Private Attributes
std::vector< TRestEventProcess * >	fFriendlyProcesses
	/// not used More...
TRestEvent *	fInputEvent = nullptr
	< not used, keep for compatibility
TRestEvent *	fOutputEvent = nullptr
	< not used, keep for compatibility
REST_Process_Output	fOutputLevel
	not used, keep for compatibility
std::vector< TRestEventProcess * >	fParallelProcesses
	Stores a list of parallel processes if multithreading is enabled.

Member Enumeration Documentation

REST_Process_Output

enum TRestEventProcess::REST_Process_Output

protected

Enumerator
No_Output	creates no branch in analysis tree, user can still manually save what he wants.
Observable	+saving observables as branches in root directory of the tree
Internal_Var	+saving the process itself as a branch. branch name is the process name. Internal variables can be found as leaf of the branch
Full_Output	+saving output event as another branch. branch name is process name+"_evtBranch"

Definition at line 39 of file TRestEventProcess.h.

Constructor & Destructor Documentation

TRestEventProcess()

TRestEventProcess::TRestEventProcess

(

)

TRestEventProcess default constructor

Definition at line 69 of file TRestEventProcess.cxx.

~TRestEventProcess()

TRestEventProcess::~TRestEventProcess

(

)

TRestEventProcess destructor

Definition at line 79 of file TRestEventProcess.cxx.

Member Function Documentation

GetMetadata()

template<class T >

T* TRestEventProcess::GetMetadata ( )

inlineprotected

Get a metadata object from the host TRestRun.

Directly input the type as template argument. This helps to simplify the code and prevents mis-spelling. For example: fReadout = GetMetadata<TRestReadout>();. No need for type conversion.

Definition at line 104 of file TRestEventProcess.h.

GetParallelDataMembers()

template<class T >

std::vector<T> TRestEventProcess::GetParallelDataMembers ( T *  member_of_process )

inlineprotected

Get a list of data members from parallel processes which is same to this process's certain data member.

This method can be used in merging and exporting histograms at the end of the process, to support multi-thread run.

Because all the parallel processes are in same data structure, this method directly gets the data members by accessing certain offset.

Usage: (suppose we defined fHist as data member) auto hists = this->GetParallelObjects(&fHist); for (auto h : hists) { fHist->Add(h); }

Definition at line 128 of file TRestEventProcess.h.

GetTotalBytes()

virtual Long64_t TRestEventProcess::GetTotalBytes ( ) const

inlinevirtual

Interface to external file reading, get the total bytes of input binary file. To be implemented in external processes.

Reimplemented in TRestRawToSignalProcess.

Definition at line 255 of file TRestEventProcess.h.

LoadSectionMetadata()

Int_t TRestEventProcess::LoadSectionMetadata ( )

overridevirtual

This method does some preparation of xml section.

Preparation includes: setting the name, title and verbose level of the current class. Finding out and saving the env sections.

By calling TRestMetadata::ReadElement(), is also expands for loops and include definitions, and replaces env and expressions in rml config section.

Reimplemented from TRestMetadata.

SetObservableValue()

template<class T >

void TRestEventProcess::SetObservableValue ( const std::string &  name, const T &  value  )

inlineprotected

Set observable value for AnalysisTree.

It will rename the observable to "processName_obsName" If use dynamic observable, it will try to create new observable in the AnalysisTree if the observable is not found

Definition at line 151 of file TRestEventProcess.h.

Field Documentation

fAnalysisTree

TRestAnalysisTree* TRestEventProcess::fAnalysisTree = nullptr

protected

< Pointer to the analysis tree where to store observable definitions and values. Note that this tree does not write data to disk. It only keeps a list of observables and their addresses. It is the one from TRestRun that reads this tree's structure, calls Fill() method, and writes data to disk. In other words, this tree is dummy and has zero entries. To get the real one, use GetFullAnalysisTree()

Definition at line 72 of file TRestEventProcess.h.

fCuts

std::vector<std::pair<std::string, TVector2> > TRestEventProcess::fCuts

protected

Stores cut definitions. Any listed observables should be in the range.

[name, id in AnalysisTree]

Definition at line 92 of file TRestEventProcess.h.

fFriendlyProcesses

std::vector<TRestEventProcess*> TRestEventProcess::fFriendlyProcesses

private

/// not used

Stores a list of friendly processes. Sometimes the process may behave differently according to the friend processes added. It can also get parameter or output event from friend processes

Definition at line 59 of file TRestEventProcess.h.

fObservablesDefined

std::map<std::string, int> TRestEventProcess::fObservablesDefined

protected

Stores the list of all the appeared process observables in the code.

[name, id in AnalysisTree]

Definition at line 90 of file TRestEventProcess.h.

fSingleThreadOnly

bool TRestEventProcess::fSingleThreadOnly = false

protected

It defines if the process can run only under single std::thread mode. If true, the whole process chain will not use multithreading. Useful for processes with viewing functionality. Always true for external processes.

Definition at line 80 of file TRestEventProcess.h.

---

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

• TRestEventProcess.h
• TRestEventProcess.cxx