Legacy Code
TTask is a legacy interface: there will be no bug fixes nor new developments. Therefore it is not recommended to use it in new long-term production code. But, depending on the context, using TTask might still be a valid solution.
TTask is a base class that can be used to build a complex tree of Tasks. Each TTask derived class may contain other TTasks that can be executed recursively, such that a complex program can be dynamically built and executed by invoking the services of the top level Task or one of its subtasks.
Use the TTask::Add function to add a subtask to an existing TTask. To execute a TTask, one calls the ExecuteTask function. ExecuteTask will call recursively:
If the top level task (see example below) is added to the list of Root browsable objects, the tree of tasks can be visualized by the Root browser. The browser can be used to start a task, set break points at the beginning of a task or when the task has completed. At a breakpoint, data structures generated by the execution up this point may be inspected asynchronously and then the execution can be resumed by selecting the "Continue" function of a task.
A Task may be active or inactive (controlled by TTask::SetActive). When a task is not active, its sub tasks are not executed.
A TTask tree may be made persistent, saving the status of all the tasks.
The Root browser's picture below has been generated by executing the following script:
{
TTask *aliroot =
new TTask(
"aliroot",
"ALICE reconstruction main task");
TTask *geominit =
new TTask(
"geomInit",
"Initialize ALICE geometry");
TTask *matinit =
new TTask(
"matInit",
"Initialize ALICE materials");
TTask *physinit =
new TTask(
"physInit",
"Initialize Physics processes");
TTask *tracker =
new TTask(
"tracker",
"Track reconstruction manager");
TTask *tpcrec =
new TTask(
"tpcrec",
"TPC reconstruction");
TTask *itsrec =
new TTask(
"itsrec",
"ITS reconstruction");
TTask *muonrec =
new TTask(
"muonRec",
"Muon Reconstruction");
TTask *phosrec =
new TTask(
"phosRec",
"Phos Reconstruction");
TTask *richrec =
new TTask(
"richRec",
"Rich Reconstruction");
TTask *trdrec =
new TTask(
"trdRec",
"TRD Reconstruction");
TTask *globrec =
new TTask(
"globRec",
"Global Track Reconstruction");
TTask *pstats =
new TTask(
"printStats",
"Print Run Statistics");
TTask *
event =
new TTask(
"event",
"Process one event");
event->Add(tracker);
event->Add(muonrec);
event->Add(phosrec);
event->Add(richrec);
event->Add(trdrec);
event->Add(globrec);
gROOT->GetListOfBrowsables()->Add(aliroot,
"aliroot");
}
Using a TBrowser one can browse all ROOT objects.
<div class="legacybox"><h2>Legacy Code</h2> TTask is a legacy interface: there will be no bug fixes n...
TTask()
Default constructor invoked when reading a TTask object from a file.
virtual void Add(TTask *task)
Add TTask to this.
Definition at line 35 of file TTask.h.
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| | TTask () |
| | Default constructor invoked when reading a TTask object from a file.
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| | TTask (const char *name, const char *title) |
| | Standard constructor.
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| | TTask (const TTask &task) |
| | Copy constructor.
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| virtual | ~TTask () |
| | Delete a task and its subtasks.
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| virtual void | Abort () |
| | Abort current tree of tasks.
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| virtual void | Add (TTask *task) |
| | Add TTask to this.
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| void | Browse (TBrowser *b) override |
| | Browse the list of tasks.
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| virtual void | CleanTasks () |
| | Reset tasks state: breakpoints and execute flags also invokes the Clear function of each task to clear all data structures created by a previous execution of a task.
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| void | Clear (Option_t *option="") override |
| | Recursively call the Clear function of this task and its subtasks.
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| virtual void | Continue () |
| | Resume execution at the current break point.
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| virtual void | Exec (Option_t *option) |
| | Dummy Execute.
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| virtual void | ExecuteTask (Option_t *option="0") |
| | Execute main task and its subtasks.
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| virtual void | ExecuteTasks (Option_t *option) |
| | Execute all the subtasks of a task.
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| Int_t | GetBreakin () const |
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| Int_t | GetBreakout () const |
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| TList * | GetListOfTasks () const |
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| TClass * | IsA () const override |
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| Bool_t | IsActive () const |
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| Bool_t | IsFolder () const override |
| | Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).
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| void | ls (Option_t *option="*") const override |
| | List the tree of tasks.
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| TTask & | operator= (const TTask &tt) |
| | Assignment operator.
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| void | SetActive (Bool_t active=kTRUE) |
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| void | SetBreakin (Int_t breakin=1) |
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| void | SetBreakout (Int_t breakout=1) |
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| void | Streamer (TBuffer &) override |
| | Stream an object of class TObject.
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| void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
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| | TNamed () |
| |
| | TNamed (const char *name, const char *title) |
| |
| | TNamed (const TNamed &named) |
| | TNamed copy ctor.
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| |
| | TNamed (const TString &name, const TString &title) |
| |
| virtual | ~TNamed () |
| | TNamed destructor.
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| |
| TObject * | Clone (const char *newname="") const override |
| | Make a clone of an object using the Streamer facility.
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| Int_t | Compare (const TObject *obj) const override |
| | Compare two TNamed objects.
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| void | Copy (TObject &named) const override |
| | Copy this to obj.
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| virtual void | FillBuffer (char *&buffer) |
| | Encode TNamed into output buffer.
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| const char * | GetName () const override |
| | Returns name of object.
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| const char * | GetTitle () const override |
| | Returns title of object.
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| ULong_t | Hash () const override |
| | Return hash value for this object.
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| Bool_t | IsSortable () const override |
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| TNamed & | operator= (const TNamed &rhs) |
| | TNamed assignment operator.
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| void | Print (Option_t *option="") const override |
| | Print TNamed name and title.
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| virtual void | SetName (const char *name) |
| | Set the name of the TNamed.
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| virtual void | SetNameTitle (const char *name, const char *title) |
| | Set all the TNamed parameters (name and title).
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| virtual void | SetTitle (const char *title="") |
| | Set the title of the TNamed.
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| virtual Int_t | Sizeof () const |
| | Return size of the TNamed part of the TObject.
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| void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
| |
| | TObject () |
| | TObject constructor.
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| | TObject (const TObject &object) |
| | TObject copy ctor.
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| virtual | ~TObject () |
| | TObject destructor.
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| |
| void | AbstractMethod (const char *method) const |
| | Use this method to implement an "abstract" method that you don't want to leave purely abstract.
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| |
| virtual void | AppendPad (Option_t *option="") |
| | Append graphics object to current pad.
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| ULong_t | CheckedHash () |
| | Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.
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| virtual const char * | ClassName () const |
| | Returns name of class to which the object belongs.
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| virtual void | Delete (Option_t *option="") |
| | Delete this object.
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| |
| virtual Int_t | DistancetoPrimitive (Int_t px, Int_t py) |
| | Computes distance from point (px,py) to the object.
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| |
| virtual void | Draw (Option_t *option="") |
| | Default Draw method for all objects.
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| virtual void | DrawClass () const |
| | Draw class inheritance tree of the class to which this object belongs.
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| |
| virtual TObject * | DrawClone (Option_t *option="") const |
| | Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1).
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| virtual void | Dump () const |
| | Dump contents of object on stdout.
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| virtual void | Error (const char *method, const char *msgfmt,...) const |
| | Issue error message.
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| virtual void | Execute (const char *method, const char *params, Int_t *error=nullptr) |
| | Execute method on this object with the given parameter string, e.g.
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| virtual void | Execute (TMethod *method, TObjArray *params, Int_t *error=nullptr) |
| | Execute method on this object with parameters stored in the TObjArray.
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| virtual void | ExecuteEvent (Int_t event, Int_t px, Int_t py) |
| | Execute action corresponding to an event at (px,py).
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| virtual void | Fatal (const char *method, const char *msgfmt,...) const |
| | Issue fatal error message.
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| virtual TObject * | FindObject (const char *name) const |
| | Must be redefined in derived classes.
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| virtual TObject * | FindObject (const TObject *obj) const |
| | Must be redefined in derived classes.
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| virtual Option_t * | GetDrawOption () const |
| | Get option used by the graphics system to draw this object.
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| virtual const char * | GetIconName () const |
| | Returns mime type name of object.
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| virtual char * | GetObjectInfo (Int_t px, Int_t py) const |
| | Returns string containing info about the object at position (px,py).
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| virtual Option_t * | GetOption () const |
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| virtual UInt_t | GetUniqueID () const |
| | Return the unique object id.
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| |
| virtual Bool_t | HandleTimer (TTimer *timer) |
| | Execute action in response of a timer timing out.
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| Bool_t | HasInconsistentHash () const |
| | Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.
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| |
| virtual void | Info (const char *method, const char *msgfmt,...) const |
| | Issue info message.
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| |
| virtual Bool_t | InheritsFrom (const char *classname) const |
| | Returns kTRUE if object inherits from class "classname".
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| virtual Bool_t | InheritsFrom (const TClass *cl) const |
| | Returns kTRUE if object inherits from TClass cl.
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| virtual void | Inspect () const |
| | Dump contents of this object in a graphics canvas.
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| void | InvertBit (UInt_t f) |
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| Bool_t | IsDestructed () const |
| | IsDestructed.
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| virtual Bool_t | IsEqual (const TObject *obj) const |
| | Default equal comparison (objects are equal if they have the same address in memory).
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| R__ALWAYS_INLINE Bool_t | IsOnHeap () const |
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| R__ALWAYS_INLINE Bool_t | IsZombie () const |
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| void | MayNotUse (const char *method) const |
| | Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).
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| virtual Bool_t | Notify () |
| | This method must be overridden to handle object notification (the base implementation is no-op).
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| void | Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const |
| | Use this method to declare a method obsolete.
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| void | operator delete (void *ptr) |
| | Operator delete.
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| void | operator delete (void *ptr, void *vp) |
| | Only called by placement new when throwing an exception.
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| void | operator delete[] (void *ptr) |
| | Operator delete [].
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| void | operator delete[] (void *ptr, void *vp) |
| | Only called by placement new[] when throwing an exception.
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| void * | operator new (size_t sz) |
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| void * | operator new (size_t sz, void *vp) |
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| void * | operator new[] (size_t sz) |
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| void * | operator new[] (size_t sz, void *vp) |
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| TObject & | operator= (const TObject &rhs) |
| | TObject assignment operator.
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| virtual void | Paint (Option_t *option="") |
| | This method must be overridden if a class wants to paint itself.
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| virtual void | Pop () |
| | Pop on object drawn in a pad to the top of the display list.
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| virtual Int_t | Read (const char *name) |
| | Read contents of object with specified name from the current directory.
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| virtual void | RecursiveRemove (TObject *obj) |
| | Recursively remove this object from a list.
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| void | ResetBit (UInt_t f) |
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| virtual void | SaveAs (const char *filename="", Option_t *option="") const |
| | Save this object in the file specified by filename.
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| virtual void | SavePrimitive (std::ostream &out, Option_t *option="") |
| | Save a primitive as a C++ statement(s) on output stream "out".
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| void | SetBit (UInt_t f) |
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| void | SetBit (UInt_t f, Bool_t set) |
| | Set or unset the user status bits as specified in f.
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| virtual void | SetDrawOption (Option_t *option="") |
| | Set drawing option for object.
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| virtual void | SetUniqueID (UInt_t uid) |
| | Set the unique object id.
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| void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
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| virtual void | SysError (const char *method, const char *msgfmt,...) const |
| | Issue system error message.
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| R__ALWAYS_INLINE Bool_t | TestBit (UInt_t f) const |
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| Int_t | TestBits (UInt_t f) const |
| |
| virtual void | UseCurrentStyle () |
| | Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.
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| virtual void | Warning (const char *method, const char *msgfmt,...) const |
| | Issue warning message.
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| virtual Int_t | Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) |
| | Write this object to the current directory.
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| virtual Int_t | Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) const |
| | Write this object to the current directory.
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Public Member Functions inherited from TNamed