4 #ifndef ALIHLTCOMPONENT_H
5 #define ALIHLTCOMPONENT_H
6 //* This file is property of and copyright by the ALICE HLT Project *
7 //* ALICE Experiment at CERN, All rights reserved. *
8 //* See cxx source for full Copyright notice *
10 /** @file AliHLTComponent.h
11 @author Matthias Richter, Timm Steinbeck
13 @brief Base class declaration for HLT components.
14 @note The class is both used in Online (PubSub) and Offline (AliRoot)
19 * @defgroup alihlt_component Component handling of the HLT module
20 * This section describes the the component base classes and handling for
23 * @section alihlt_component_intro General remarks
24 * HLT analysis is organized in so called components. Each component can
25 * subscribe to the data produced by other components and can from the
26 * analysis publish new data for the subsequent components. Only the
27 * input data blocks and entries from CDB are available for the analysis.
29 * @section alihlt_component_intro Component implementation
30 * AliHLTComponent provides the interface for all components, see there
31 * for details. Three types are provided:
36 * The two last represent data sinks and sources for the HLT integration
37 * into AliRoot. When running only, only the processors are relevant,
38 * sources and sinks are provided by the HLT PubSub framework. Please check
39 * AliHLTComponent for detailed description.
41 * @section alihlt_component_registration Component registration
42 * Components need to be registered with the AliHLTComponentHandler in
43 * order to be used with the system. Registration is purely done from the
44 * module library. Two methods are possible:
45 * - the module library implements an AliHLTModuleAgent and overloads the
46 * AliHLTModuleAgent::RegisterComponents() function
47 * - in the implementation file, one object is defined. The global object is
48 * automatically instantiated when the library is loaded for the first
49 * time and the object is used for registration.
51 * In both cases, the library must be loaded via the method
53 * AliHLTComponentHandler::LoadComponentLibraries()
55 * For the global object approach it is important that the library is
56 * not loaded elsewhere before (e.g. a gSystem->Load operation in your
64 #include "AliHLTLogging.h"
65 #include "AliHLTDataTypes.h"
66 #include "AliHLTCommonCDBEntries.h"
69 * The names have been changed for Aliroot's coding conventions sake
70 * The old names are defined for backward compatibility with the
71 * stand alone SampleLib package
73 typedef AliHLTComponentLogSeverity AliHLTComponent_LogSeverity;
74 typedef AliHLTComponentEventData AliHLTComponent_EventData;
75 typedef AliHLTComponentShmData AliHLTComponent_ShmData;
76 typedef AliHLTComponentDataType AliHLTComponent_DataType;
77 typedef AliHLTComponentBlockData AliHLTComponent_BlockData;
78 typedef AliHLTComponentTriggerData AliHLTComponent_TriggerData;
79 typedef AliHLTComponentEventDoneData AliHLTComponent_EventDoneData;
81 class AliHLTComponentHandler;
84 class AliHLTComponent;
85 class AliHLTMemoryFile;
87 /** list of component data type structures */
88 typedef vector<AliHLTComponentDataType> AliHLTComponentDataTypeList;
89 /** list of component block data structures */
90 typedef vector<AliHLTComponentBlockData> AliHLTComponentBlockDataList;
91 /** list of component statistics struct */
92 typedef vector<AliHLTComponentStatistics> AliHLTComponentStatisticsList;
93 /** list of component pointers */
94 typedef vector<AliHLTComponent*> AliHLTComponentPList;
95 /** list of memory file pointers */
96 typedef vector<AliHLTMemoryFile*> AliHLTMemoryFilePList;
99 * @class AliHLTComponent
100 * Base class of HLT data processing components.
101 * The class provides a common interface for HLT data processing components.
102 * The interface can be accessed from the online HLT framework or the AliRoot
103 * offline analysis framework.
104 * @section alihltcomponent-properties Component identification and properties
105 * Each component must provide a unique ID, input and output data type indications,
106 * and a spawn function.
107 * @subsection alihltcomponent-req-methods Required property methods
108 * - @ref GetComponentID
109 * - @ref GetInputDataTypes (see @ref alihltcomponent-type for default
111 * - @ref GetOutputDataType (see @ref alihltcomponent-type for default
113 * - @ref GetOutputDataSize (see @ref alihltcomponent-type for default
117 * @subsection alihltcomponent-opt-mehods Optional handlers
120 * - @ref GetOutputDataTypes
121 * If the component has multiple output data types @ref GetOutputDataType
122 * should return @ref kAliHLTMultipleDataType. The framework will invoke
123 * @ref GetOutputDataTypes, a list can be filled.
125 * @subsection alihltcomponent-processing-mehods Data processing
128 * @subsection alihltcomponent-type Component type
129 * Components can be of type
130 * - @ref kSource components which only produce data
131 * - @ref kProcessor components which consume and produce data
132 * - @ref kSink components which only consume data
134 * where data production and consumption refer to the analysis data stream. In
135 * order to indicate the type, a child component can overload the
136 * @ref GetComponentType function.
137 * @subsubsection alihltcomponent-type-std Standard implementations
138 * Components in general do not need to implement this function, standard
139 * implementations of the 3 types are available:
140 * - AliHLTDataSource for components of type @ref kSource <br>
141 * All types of data sources can inherit from AliHLTDataSource and must
142 * implement the @ref AliHLTDataSource::GetEvent method. The class
143 * also implements a standard method for @ref GetInputDataTypes.
145 * - AliHLTProcessor for components of type @ref kProcessor <br>
146 * All types of data processors can inherit from AliHLTDataSource and must
147 * implement the @ref AliHLTProcessor::DoEvent method.
149 * - AliHLTDataSink for components of type @ref kSink <br>
150 * All types of data processors can inherit from AliHLTDataSource and must
151 * implement the @ref AliHLTDataSink::DumpEvent method. The class
152 * also implements a standard method for @ref GetOutputDataType and @ref
155 * @subsection alihltcomponent-environment Running environment
157 * In order to adapt to different environments (on-line/off-line), the component
158 * gets an environment structure with function pointers. The base class provides
159 * member functions for those environment dependend functions. The member
160 * functions are used by the component implementation and are re-mapped to the
161 * corresponding functions.
163 * @section alihltcomponent-interfaces Component interfaces
164 * Each of the 3 standard component base classes AliHLTProcessor, AliHLTDataSource
165 * and AliHLTDataSink provides it's own processing method (see
166 * @ref alihltcomponent-type-std), which splits into a high and a low-level
167 * method. For the @ref alihltcomponent-low-level-interface, all parameters are
168 * shipped as function arguments, the component is supposed to dump data to the
169 * output buffer and handle all block descriptors.
170 * The @ref alihltcomponent-high-level-interface is the standard processing
171 * method and will be used whenever the low-level method is not overloaded.
173 * In both cases it is necessary to calculate/estimate the size of the output
174 * buffer before the processing. Output buffers can never be allocated inside
175 * the component because of the push-architecture of the HLT.
176 * For that reason the @ref GetOutputDataSize function should return a rough
177 * estimatian of the data to be produced by the component. The component is
178 * responsible for checking the memory size and must return -ENOSPC if the
179 * available buffer is to small, and update the estimator respectively. The
180 * framework will allocate a buffer of appropriate size and call the processing
183 * @subsection alihltcomponent-error-codes Data processing
184 * For return codes, the following scheme applies:
185 * - The data processing methods have to indicate error conditions by a negative
186 * error/return code. Preferably the system error codes are used like
187 * e.g. -EINVAL. This requires to include the header
189 * \#include \<cerrno\>
191 * - If no suitable input block could be found (e.g. no clusters for the TPC cluster
192 * finder) set size to 0, block list is empty, return 0
193 * - If no ususable or significant signal could be found in the input blocks
194 * return an empty output block, set size accordingly, and return 0. An empty output
195 * block here could be either a real empty one of size 0 (in which case size also
196 * would have to be set to zero) or a block filled with just the minimum necessary
197 * accounting/meta-structures. E.g. in the TPC
199 * @subsection alihltcomponent-high-level-interface High-level interface
200 * The high-level component interface provides functionality to exchange ROOT
201 * structures between components. In contrast to the
202 * @ref alihltcomponent-low-level-interface, a couple of functions can be used
203 * to access data blocks of the input stream
204 * and send data blocks or ROOT TObject's to the output stream. The functionality
205 * is hidden from the user and is implemented by using ROOT's TMessage class.
207 * @subsubsection alihltcomponent-high-level-int-methods Interface methods
208 * The interface provides a couple of methods in order to get objects from the
209 * input, data blocks (non TObject) from the input, and to push back objects and
210 * data blocks to the output. For convenience there are several functions of
211 * identical name (and similar behavior) with different parameters defined.
212 * Please refer to the function documentation.
213 * - @ref GetNumberOfInputBlocks <br>
214 * return the number of data blocks in the input stream
215 * - @ref GetFirstInputObject <br>
216 * get the first object of a specific data type
217 * - @ref GetNextInputObject <br>
218 * get the next object of same data type as last GetFirstInputObject/Block call
219 * - @ref GetFirstInputBlock <br>
220 * get the first block of a specific data type
221 * - @ref GetNextInputBlock <br>
222 * get the next block of same data type as last GetFirstInputBlock/Block call
223 * - @ref PushBack <br>
224 * insert an object or data buffer into the output
225 * - @ref CreateEventDoneData <br>
226 * add event information to the output
228 * In addition, the processing methods are simplified a bit by cutting out most of
231 * - @ref AliHLTProcessor::DoEvent
232 * - @ref AliHLTDataSource::GetEvent
233 * - @ref AliHLTDataSink::DumpEvent
235 * \em IMPORTANT: objects and block descriptors provided by the high-level interface
236 * <b>MUST NOT BE DELETED</b> by the caller.
238 * @subsubsection alihltcomponent-high-level-int-guidelines High-level interface guidelines
239 * - Structures must inherit from the ROOT object base class TObject in order be
240 * transported by the transportation framework.
241 * - all pointer members must be transient (marked <tt>//!</tt> behind the member
242 * definition), i.e. will not be stored/transported, or properly marked
243 * (<tt>//-></tt>) in order to call the streamer of the object the member is pointing
244 * to. The latter is not recomended. Structures to be transported between components
245 * should be streamlined.
246 * - no use of stl vectors/strings, use appropriate ROOT classes instead
248 * @subsection alihltcomponent-low-level-interface Low-level interface
249 * The low-level component interface consists of the specific data processing
250 * methods for @ref AliHLTProcessor, @ref AliHLTDataSource, and @ref AliHLTDataSink.
251 * - @ref AliHLTProcessor::DoEvent
252 * - @ref AliHLTDataSource::GetEvent
253 * - @ref AliHLTDataSink::DumpEvent
256 * @section alihltcomponent-handling Component handling
257 * The handling of HLT analysis components is carried out by the AliHLTComponentHandler.
258 * Component are registered automatically at load-time of the component shared library
259 * under the following suppositions:
260 * - the component library has to be loaded from the AliHLTComponentHandler using the
261 * @ref AliHLTComponentHandler::LoadLibrary method.
262 * - the component implementation defines one global object (which is generated
263 * when the library is loaded)
265 * @subsection alihltcomponent-design-rules General design considerations
266 * The analysis code should be implemented in one or more destict class(es). A
267 * \em component should be implemented which interface the destict analysis code to the
268 * component interface. This component generates the analysis object dynamically. <br>
270 * Assume you have an implemetation <tt> AliHLTDetMyAnalysis </tt>, another class <tt>
271 * AliHLTDetMyAnalysisComponent </tt> contains:
274 * AliHLTDetMyAnalysis* fMyAnalysis; //!
276 * The object should then be instantiated in the DoInit handler of
277 * <tt>AliHLTDetMyAnalysisComponent </tt>, and cleaned in the DoDeinit handler.
280 * - avoid big static arrays in the component, allocate the memory at runtime
282 * @ingroup alihlt_component
283 * @section alihltcomponent-members Class members
285 class AliHLTComponent : public AliHLTLogging {
287 /** standard constructor */
289 /** standard destructor */
290 virtual ~AliHLTComponent();
292 /** component type definitions */
293 enum TComponentType { kUnknown=0, kSource=1, kProcessor=2, kSink=3 };
296 * Init function to prepare data processing.
297 * Initialization of common data structures for a sequence of events.
298 * The call is redirected to the internal method @ref DoInit which can be
299 * overridden by the child class.<br>
300 * During Init also the environment structure is passed to the component.
301 * @param environ environment pointer with environment dependend function
303 * @param environParam additionel parameter for function calls, the pointer
305 * @param argc size of the argument array
306 * @param argv agument array for component initialization
308 virtual int Init( const AliHLTComponentEnvironment* environ, void* environParam, int argc, const char** argv );
311 * Clean-up function to terminate data processing.
312 * Clean-up of common data structures after data processing.
313 * The call is redirected to the internal method @ref DoDeinit which can be
314 * overridden by the child class.
316 virtual int Deinit();
319 * Processing of one event.
320 * The method is the entrance of the event processing. The parameters are
321 * cached for uses with the high-level interface and the DoProcessing
322 * implementation is called.
329 * @param outputBlockCnt out: size of the output block array, set by the component
330 * @param outputBlocks out: the output block array is allocated internally
332 * @return neg. error code if failed
334 int ProcessEvent( const AliHLTComponentEventData& evtData, const AliHLTComponentBlockData* blocks,
335 AliHLTComponentTriggerData& trigData, AliHLTUInt8_t* outputPtr,
336 AliHLTUInt32_t& size, AliHLTUInt32_t& outputBlockCnt,
337 AliHLTComponentBlockData*& outputBlocks,
338 AliHLTComponentEventDoneData*& edd );
341 * Internal processing of one event.
342 * The method is pure virtual and implemented by the child classes
343 * - @ref AliHLTProcessor
344 * - @ref AliHLTDataSource
345 * - @ref AliHLTDataSink
352 * @param outputBlocks out: the output block array is allocated internally
354 * @return neg. error code if failed
356 virtual int DoProcessing( const AliHLTComponentEventData& evtData, const AliHLTComponentBlockData* blocks,
357 AliHLTComponentTriggerData& trigData, AliHLTUInt8_t* outputPtr,
358 AliHLTUInt32_t& size,
359 AliHLTComponentBlockDataList& outputBlocks,
360 AliHLTComponentEventDoneData*& edd ) = 0;
364 * The function must not be called when running in AliRoot unless it it
365 * really wanted. The CDB path will be set to the specified path, which might
366 * override the path initialized at the beginning of the AliRoot reconstruction.
368 * The method is used from the external interface in order to set the correct
369 * path when running on-line. The function also initializes the function
370 * callback for setting the run no during operation.
372 * A separation of library and component handling is maybe appropriate in the
373 * future. Using the global component handler here is maybe not the cleanest
375 * @param cdbPath path of the CDB
376 * @param pHandler the component handler used for llibrary handling.
378 int InitCDB(const char* cdbPath, AliHLTComponentHandler* pHandler);
381 * Set the run no for the CDB.
382 * The function must not be called when running in AliRoot unless it it
383 * really wanted. The CDB path will be set to the specified path, which might
384 * override the run no initialized at the beginning of the AliRoot reconstruction.
385 * InitCDB() has to be called before in order to really change the CDB settings.
387 * The method is used from the external interface in order to set the correct
388 * path when running on-line.
390 int SetCDBRunNo(int runNo);
393 * Set the run description.
394 * The run description is set before the call of Init() -> DoInit().
395 * @note: This functionality has been added in Juli 2008. The transmission of
396 * run properties by a special SOR (SOD event in DAQ terminalogy but this was
397 * changed after the HLT interface was designed) event is not sufficient because
398 * the data might be needed already in the DoInit handler of the component.
399 * @param desc run descriptor, currently only the run no member is used
400 * @param runType originally, run type was supposed to be a number and part
401 * of the run descriptor. But it was defined as string later
403 int SetRunDescription(const AliHLTRunDesc* desc, const char* runType);
406 * Set the component description.
407 * The description string can contain tokens separated by blanks, a token
408 * consists of a key and an optional value separated by '='.
410 * \li -chainid=id string id within the chain of the instance
412 * @param desc component description
414 int SetComponentDescription(const char* desc);
416 // Information member functions for registration.
419 * Get the type of the component.
420 * The function is pure virtual and must be implemented by the child class.
421 * @return component type id
423 virtual TComponentType GetComponentType() = 0; // Source, sink, or processor
426 * Get the id of the component.
427 * Each component is identified by a unique id.
428 * The function is pure virtual and must be implemented by the child class.
429 * @return component id (string)
431 virtual const char* GetComponentID() = 0;
434 * Get the input data types of the component.
435 * The function is pure virtual and must be implemented by the child class.
436 * @return list of data types in the vector reference
438 virtual void GetInputDataTypes( AliHLTComponentDataTypeList& ) = 0;
441 * Get the output data type of the component.
442 * The function is pure virtual and must be implemented by the child class.
443 * @return output data type
445 virtual AliHLTComponentDataType GetOutputDataType() = 0;
448 * Get the output data types of the component.
449 * The function can be implemented to indicate multiple output data types
450 * in the target array.
451 * @ref GetOutputDataType must return @ref kAliHLTMultipleDataType in order
452 * to invoke this method.
453 * @param tgtList list to receive the data types
454 * @return no of output data types, data types in the target list
456 virtual int GetOutputDataTypes(AliHLTComponentDataTypeList& tgtList);
459 * Get a ratio by how much the data volume is shrinked or enhanced.
460 * The function is pure virtual and must be implemented by the child class.
461 * @param constBase <i>return</i>: additive part, independent of the
463 * @param inputMultiplier <i>return</i>: multiplication ratio
464 * @return values in the reference variables
466 virtual void GetOutputDataSize( unsigned long& constBase, double& inputMultiplier ) = 0;
470 * Each component must implement a spawn function to create a new instance of
471 * the class. Basically the function must return <i>new <b>my_class_name</b></i>.
472 * @return new class instance
474 virtual AliHLTComponent* Spawn() = 0;
477 * Find matching data types between this component and a consumer component.
478 * Currently, a component can produce only one type of data. This restriction is most
479 * likely to be abolished in the future.
480 * @param pConsumer a component and consumer of the data produced by this component
481 * @param tgtList reference to a vector list to receive the matching data types.
482 * @return >= 0 success, neg. error code if failed
484 int FindMatchingDataTypes(AliHLTComponent* pConsumer, AliHLTComponentDataTypeList* tgtList);
487 * Set the global component handler.
488 * The static method is needed for the automatic registration of components.
490 static int SetGlobalComponentHandler(AliHLTComponentHandler* pCH, int bOverwrite=0);
493 * Clear the global component handler.
494 * The static method is needed for the automatic registration of components.
496 static int UnsetGlobalComponentHandler();
499 * Helper function to convert the data type to a string.
500 * @param type data type structure
501 * @param mode 0 print string origin:type <br>
505 static string DataType2Text( const AliHLTComponentDataType& type, int mode=0);
508 * Helper function to print content of data type.
510 static void PrintDataTypeContent(AliHLTComponentDataType& dt, const char* format=NULL);
513 * helper function to initialize AliHLTComponentEventData structure
515 static void FillEventData(AliHLTComponentEventData& evtData);
518 * Print info on an AliHLTComponentDataType structure
519 * This is just a helper function to examine an @ref AliHLTComponentDataType
522 static void PrintComponentDataTypeInfo(const AliHLTComponentDataType& dt);
525 * Fill AliHLTComponentBlockData structure with default values.
526 * @param blockData reference to data structure
528 static void FillBlockData( AliHLTComponentBlockData& blockData );
531 * Fill AliHLTComponentShmData structure with default values.
532 * @param shmData reference to data structure
534 static void FillShmData( AliHLTComponentShmData& shmData );
537 * Fill AliHLTComponentDataType structure with default values.
538 * @param dataType reference to data structure
540 static void FillDataType( AliHLTComponentDataType& dataType );
543 * Copy data type structure
544 * Copies the value an AliHLTComponentDataType structure to another one
545 * @param[out] tgtdt target structure
546 * @param[in] srcdt source structure
548 static void CopyDataType(AliHLTComponentDataType& tgtdt, const AliHLTComponentDataType& srcdt);
551 * Set the ID and Origin of an AliHLTComponentDataType structure.
552 * The function sets the fStructureSize member and copies the strings
553 * to the ID and Origin. Only characters from the valid part of the string
554 * are copied, the rest is filled with 0's. <br>
555 * Please note that the fID and fOrigin members are not strings, just arrays of
556 * chars of size @ref kAliHLTComponentDataTypefIDsize and
557 * @ref kAliHLTComponentDataTypefOriginSize respectively and not necessarily with
558 * a terminating zero. <br>
559 * It is possible to pass NULL pointers as id or origin argument, in that case they
561 * @param tgtdt target data type structure
562 * @param id ID string
563 * @param origin Origin string
565 static void SetDataType(AliHLTComponentDataType& tgtdt, const char* id, const char* origin);
568 * Set the ID and Origin of an AliHLTComponentDataType structure.
569 * Given the fact that the data type ID is 64bit wide and origin 32, this helper
570 * function sets the data type from those two parameters.
571 * @param dt target data type structure
573 * @param orig 32bit origin
575 static void SetDataType(AliHLTComponentDataType& dt, AliHLTUInt64_t id, AliHLTUInt32_t orig);
578 * Stopwatch type for benchmarking.
580 enum AliHLTStopwatchType {
581 /** total time for event processing */
583 /** detector algorithm w/o interface callbacks */
589 /** number of types */
594 * Helper class for starting and stopping a stopwatch.
595 * The guard can be used by instantiating an object in a function. The
596 * specified stopwatch is started and the previous stopwatch put on
597 * hold. When the function is terminated, the object is deleted automatically
598 * deleted, stopping the stopwatch and starting the one on hold.<br>
599 * \em IMPORTANT: never create dynamic objects from this guard as this violates
600 * the idea of a guard.
602 class AliHLTStopwatchGuard {
604 /** standard constructor (not for use) */
605 AliHLTStopwatchGuard();
607 AliHLTStopwatchGuard(TStopwatch* pStart);
608 /** copy constructor (not for use) */
609 AliHLTStopwatchGuard(const AliHLTStopwatchGuard&);
610 /** assignment operator (not for use) */
611 AliHLTStopwatchGuard& operator=(const AliHLTStopwatchGuard&);
613 ~AliHLTStopwatchGuard();
617 * Hold the previous guard for the existence of this guard.
618 * Checks whether this guard controls a new stopwatch. In that case, the
619 * previous guard and its stopwatch are put on hold.
620 * @param pSucc instance of the stopwatch of the new guard
621 * @return 1 if pSucc is a different stopwatch which should
623 * 0 if it controls the same stopwatch
625 int Hold(TStopwatch* pSucc);
628 * Resume the previous guard.
629 * Checks whether the peceeding guard controls a different stopwatch. In that
630 * case, the its stopwatch is resumed.
631 * @param pSucc instance of the stopwatch of the new guard
632 * @return 1 if pSucc is a different stopwatch which should
634 * 0 if it controls the same stopwatch
636 int Resume(TStopwatch* pSucc);
638 /** the stopwatch controlled by this guard */
639 TStopwatch* fpStopwatch; //!transient
641 /** previous stopwatch guard, put on hold during existence of the guard */
642 AliHLTStopwatchGuard* fpPrec; //!transient
644 /** active stopwatch guard */
645 static AliHLTStopwatchGuard* fgpCurrent; //!transient
649 * Set a stopwatch for a given purpose.
650 * @param pSW stopwatch object
651 * @param type type of the stopwatch
653 int SetStopwatch(TObject* pSW, AliHLTStopwatchType type=kSWBase);
656 * Init a set of stopwatches.
657 * @param pStopwatches object array of stopwatches
659 int SetStopwatches(TObjArray* pStopwatches);
664 * Default method for the internal initialization.
665 * The method is called by @ref Init
667 virtual int DoInit( int argc, const char** argv );
670 * Default method for the internal clean-up.
671 * The method is called by @ref Deinit
673 virtual int DoDeinit();
676 * Reconfigure the component.
677 * The method is called when an event of type @ref kAliHLTDataTypeComConf
678 * {COM_CONF:PRIV} is received by the component. If the event is sent as
679 * part of a normal event, the component configuration is called first.
681 * The CDB path parameter specifies the path in the CDB, i.e. without
682 * leading absolute path of the CDB location. The framework might alse
683 * provide the id of the component in the analysis chain.
685 * \b Note: The CDB will be initialized by the framework, either already set
686 * from AliRoot or from the wrapper interface during initialization.
688 * @param cdbEntry path of the cdbEntry
689 * @param chainId the id/name of the component in the current analysis
690 * chain. This is not necessarily the same as what is
691 * returned by the GetComponentID() method.
692 * @note both parameters can be NULL, check before usage
694 virtual int Reconfigure(const char* cdbEntry, const char* chainId);
697 * Read the Preprocessor values.
698 * The function is invoked when the component is notified about available/
699 * updated data points from the detector Preprocessors. The 'modules'
700 * argument contains all detectors for which the Preprocessors have
701 * updated data points. The component has to implement the CDB access to
702 * get the desired data points.
703 * @param modules detectors for which the Preprocessors have updated
704 * data points: TPC, TRD, ITS, PHOS, MUON, or ALL if
705 * no argument was received.
706 * @return neg. error code if failed
708 virtual int ReadPreprocessorValues(const char* modules);
711 * Custom handler for the SOR event.
712 * Is invoked from the base class if an SOR event is in the block list.
713 * The handler is called before the processing function. The processing
714 * function is skipped if there are no other data blocks available.
716 * The SOR event is generated by the PubSub framework in response to
717 * the DAQ start of data (SOD - has been renamed after HLT interface
718 * was designed). The SOD event consists of 3 blocks:
719 * - ::kAliHLTDataTypeEvent block: spec ::gkAliEventTypeStartOfRun
720 * - SOD block of type ::kAliHLTDataTypeSOR, payload: AliHLTRunDesc struct
721 * - run type block ::kAliHLTDataTypeRunType, payload: run type string
723 * Run properties can be retrieved by getters like GetRunNo().
724 * @return neg. error code if failed
726 virtual int StartOfRun();
729 * Custom handler for the EOR event.
730 * Is invoked from the base class if an EOR event is in the block list.
731 * The handler is called before the processing function. The processing
732 * function is skipped if there are no other data blocks available.
734 * See StartOfRun() for mor ecomments of the sequence of steering events.
736 * @return neg. error code if failed
738 virtual int EndOfRun();
741 * General memory allocation method.
742 * All memory which is going to be used 'outside' of the interface must
743 * be provided by the framework (online or offline).
744 * The method is redirected to a function provided by the current
745 * framework. Function pointers are transferred via the @ref
746 * AliHLTComponentEnvironment structure.
748 void* AllocMemory( unsigned long size );
751 * Helper function to create a monolithic BlockData description block out
752 * of a list BlockData descriptors.
753 * For convenience, inside the interface vector lists are used, to make the
754 * interface pure C style, monilithic blocks must be exchanged.
755 * The method is redirected to a function provided by the current
756 * framework. Function pointers are transferred via the @ref
757 * AliHLTComponentEnvironment structure.
759 int MakeOutputDataBlockList( const AliHLTComponentBlockDataList& blocks, AliHLTUInt32_t* blockCount,
760 AliHLTComponentBlockData** outputBlocks );
763 * Fill the EventDoneData structure.
764 * The method is redirected to a function provided by the current
765 * framework. Function pointers are transferred via the @ref
766 * AliHLTComponentEnvironment structure.
768 int GetEventDoneData( unsigned long size, AliHLTComponentEventDoneData** edd );
771 * Helper function to convert the data type to a string.
773 void DataType2Text(const AliHLTComponentDataType& type, char output[kAliHLTComponentDataTypefIDsize+kAliHLTComponentDataTypefOriginSize+2]) const;
777 * @return value of the internal event counter
779 int GetEventCount() const;
782 * Get the number of input blocks.
783 * @return number of input blocks
785 int GetNumberOfInputBlocks() const;
788 * Get the first object of a specific data type from the input data.
789 * The hight-level methods provide functionality to transfer ROOT data
790 * structures which inherit from TObject.
792 * The method looks for the first ROOT object of type dt in the input stream.
793 * If also the class name is provided, the object is checked for the right
794 * class type. The input data block needs a certain structure, namely the
795 * buffer size as first word. If the cross check fails, the retrieval is
796 * silently abondoned, unless the \em bForce parameter is set.<br>
797 * \b Note: THE OBJECT MUST NOT BE DELETED by the caller.
799 * If called without parameters, the function tries to create objects from
800 * all available input blocks, also the ones of data type kAliHLTVoidDataType
801 * which are not matched by kAliHLTAnyDataType.
803 * @param dt data type of the object
804 * @param classname class name of the object
805 * @param bForce force the retrieval of an object, error messages
806 * are suppressed if \em bForce is not set
807 * @return pointer to @ref TObject, NULL if no objects of specified type
810 const TObject* GetFirstInputObject(const AliHLTComponentDataType& dt=kAliHLTAllDataTypes,
811 const char* classname=NULL,
815 * Get the first object of a specific data type from the input data.
816 * The hight-level methods provide functionality to transfer ROOT data
817 * structures which inherit from TObject.
818 * The method looks for the first ROOT object of type specified by the ID and
819 * Origin strings in the input stream.
820 * If also the class name is provided, the object is checked for the right
821 * class type. The input data block needs a certain structure, namely the
822 * buffer size as first word. If the cross check fails, the retrieval is
823 * silently abondoned, unless the \em bForce parameter is set.<br>
824 * \em Note: THE OBJECT MUST NOT BE DELETED by the caller.
825 * @param dtID data type ID of the object
826 * @param dtOrigin data type origin of the object
827 * @param classname class name of the object
828 * @param bForce force the retrieval of an object, error messages
829 * are suppressed if \em bForce is not set
830 * @return pointer to @ref TObject, NULL if no objects of specified type
833 const TObject* GetFirstInputObject(const char* dtID,
834 const char* dtOrigin,
835 const char* classname=NULL,
839 * Get the next object of a specific data type from the input data.
840 * The hight-level methods provide functionality to transfer ROOT data
841 * structures which inherit from TObject.
842 * The method looks for the next ROOT object of type and class specified
843 * to the previous @ref GetFirstInputObject call.<br>
844 * \em Note: THE OBJECT MUST NOT BE DELETED by the caller.
845 * @param bForce force the retrieval of an object, error messages
846 * are suppressed if \em bForce is not set
847 * @return pointer to @ref TObject, NULL if no more objects available
849 const TObject* GetNextInputObject(int bForce=0);
852 * Get data type of an input block.
853 * Get data type of the object previously fetched via
854 * GetFirstInputObject/NextInputObject or the last one if no object
856 * @param pObject pointer to TObject
857 * @return data specification, kAliHLTVoidDataSpec if failed
859 AliHLTComponentDataType GetDataType(const TObject* pObject=NULL);
862 * Get data specification of an input block.
863 * Get data specification of the object previously fetched via
864 * GetFirstInputObject/NextInputObject or the last one if no object
866 * @param pObject pointer to TObject
867 * @return data specification, kAliHLTVoidDataSpec if failed
869 AliHLTUInt32_t GetSpecification(const TObject* pObject=NULL);
872 * Get the first block of a specific data type from the input data.
873 * The method looks for the first block of type dt in the input stream.
874 * It is intended to be used within the high-level interface.<br>
875 * \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller.
877 * If called without parameters, the function works on all input blocks,
878 * also the ones of data type kAliHLTVoidDataType which are not matched by
879 * kAliHLTAnyDataType.
881 * @param dt data type of the block
882 * @return pointer to @ref AliHLTComponentBlockData
884 const AliHLTComponentBlockData* GetFirstInputBlock(const AliHLTComponentDataType& dt=kAliHLTAllDataTypes);
887 * Get the first block of a specific data type from the input data.
888 * The method looks for the first block of type specified by the ID and
889 * Origin strings in the input stream. It is intended
890 * to be used within the high-level interface.<br>
891 * \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller.
892 * @param dtID data type ID of the block
893 * @param dtOrigin data type origin of the block
894 * @return pointer to @ref AliHLTComponentBlockData
896 const AliHLTComponentBlockData* GetFirstInputBlock(const char* dtID,
897 const char* dtOrigin);
900 * Get input block by index.<br>
901 * \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller.
902 * @return pointer to AliHLTComponentBlockData, NULL if index out of range
904 const AliHLTComponentBlockData* GetInputBlock(int index);
907 * Get the next block of a specific data type from the input data.
908 * The method looks for the next block of type and class specified
909 * to the previous @ref GetFirstInputBlock call.
910 * To be used within the high-level interface.<br>
911 * \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller.
913 const AliHLTComponentBlockData* GetNextInputBlock();
916 * Get data specification of an input block.
917 * Get data specification of the input bblock previously fetched via
918 * GetFirstInputObject/NextInputObject or the last one if no block
920 * @param pBlock pointer to input block
921 * @return data specification, kAliHLTVoidDataSpec if failed
923 AliHLTUInt32_t GetSpecification(const AliHLTComponentBlockData* pBlock=NULL);
926 * Forward an input object to the output.
927 * Forward the input block of an object previously fetched via
928 * GetFirstInputObject/NextInputObject or the last one if no object
930 * The block descriptor of the input block is forwarded to the
932 * @param pObject pointer to TObject
933 * @return neg. error code if failed
935 int Forward(const TObject* pObject);
938 * Forward an input block to the output.
939 * Forward the input block fetched via GetFirstInputObject/
940 * NextInputBlock or the last one if no block specified.
941 * The block descriptor of the input block is forwarded to the
943 * @param pBlock pointer to input block
944 * @return neg. error code if failed
946 int Forward(const AliHLTComponentBlockData* pBlock=NULL);
949 * Insert an object into the output.
950 * If header is specified, it will be inserted before the root object,
951 * default is no header.
952 * @param pObject pointer to root object
953 * @param dt data type of the object
954 * @param spec data specification
955 * @param pHeader pointer to header
956 * @param headerSize size of Header
957 * @return neg. error code if failed
959 int PushBack(TObject* pObject, const AliHLTComponentDataType& dt,
960 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
961 void* pHeader=NULL, int headerSize=0);
964 * Insert an object into the output.
965 * If header is specified, it will be inserted before the root object,
966 * default is no header.
967 * @param pObject pointer to root object
968 * @param dtID data type ID of the object
969 * @param dtOrigin data type origin of the object
970 * @param spec data specification
971 * @param pHeader pointer to header
972 * @param headerSize size of Header
973 * @return neg. error code if failed
975 int PushBack(TObject* pObject, const char* dtID, const char* dtOrigin,
976 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
977 void* pHeader=NULL, int headerSize=0);
980 * Insert an object into the output.
981 * @param pBuffer pointer to buffer
982 * @param iSize size of the buffer
983 * @param dt data type of the object
984 * @param spec data specification
985 * @param pHeader pointer to header
986 * @param headerSize size of Header
987 * @return neg. error code if failed
989 int PushBack(void* pBuffer, int iSize, const AliHLTComponentDataType& dt,
990 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
991 void* pHeader=NULL, int headerSize=0);
994 * Insert an object into the output.
995 * @param pBuffer pointer to buffer
996 * @param iSize size of the buffer
997 * @param dtID data type ID of the object
998 * @param dtOrigin data type origin of the object
999 * @param spec data specification
1000 * @param pHeader pointer to header
1001 * @param headerSize size of Header
1002 * @return neg. error code if failed
1004 int PushBack(void* pBuffer, int iSize, const char* dtID, const char* dtOrigin,
1005 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1006 void* pHeader=NULL, int headerSize=0);
1009 * Estimate size of a TObject
1011 * @return buffer size in byte
1013 int EstimateObjectSize(TObject* pObject) const;
1016 * Create a memory file in the output stream.
1017 * This method creates a TFile object which stores all data in
1018 * memory instead of disk. The TFile object is published as binary data.
1019 * The instance can be used like a normal TFile object. The TFile::Close
1020 * or @ref CloseMemoryFile method has to be called in order to flush the
1023 * \b Note: The returned object is deleted by the framework.
1024 * @param capacity total size reserved for the memory file
1025 * @param dtID data type ID of the file
1026 * @param dtOrigin data type origin of the file
1027 * @param spec data specification
1028 * @return file handle, NULL if failed
1030 AliHLTMemoryFile* CreateMemoryFile(int capacity, const char* dtID, const char* dtOrigin,
1031 AliHLTUInt32_t spec=kAliHLTVoidDataSpec);
1034 * Create a memory file in the output stream.
1035 * This method creates a TFile object which stores all data in
1036 * memory instead of disk. The TFile object is published as binary data.
1037 * The instance can be used like a normal TFile object. The TFile::Close
1038 * or @ref CloseMemoryFile method has to be called in order to flush the
1041 * \b Note: The returned object is deleted by the framework.
1042 * @param capacity total size reserved for the memory file
1043 * @param dt data type of the file
1044 * @param spec data specification
1045 * @return file handle, NULL if failed
1047 AliHLTMemoryFile* CreateMemoryFile(int capacity,
1048 const AliHLTComponentDataType& dt=kAliHLTAnyDataType,
1049 AliHLTUInt32_t spec=kAliHLTVoidDataSpec);
1052 * Create a memory file in the output stream.
1053 * This method creates a TFile object which stores all data in
1054 * memory instead of disk. The TFile object is published as binary data.
1055 * The instance can be used like a normal TFile object. The TFile::Close
1056 * or @ref CloseMemoryFile method has to be called in order to flush the
1059 * \b Note: The returned object is deleted by the framework.
1060 * @param dtID data type ID of the file
1061 * @param dtOrigin data type origin of the file
1062 * @param spec data specification
1063 * @param capacity fraction of the available output buffer size
1064 * @return file handle, NULL if failed
1066 AliHLTMemoryFile* CreateMemoryFile(const char* dtID, const char* dtOrigin,
1067 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1068 float capacity=1.0);
1071 * Create a memory file in the output stream.
1072 * This method creates a TFile object which stores all data in
1073 * memory instead of disk. The TFile object is published as binary data.
1074 * The instance can be used like a normal TFile object. The TFile::Close
1075 * or @ref CloseMemoryFile method has to be called in order to flush the
1078 * \b Note: The returned object is deleted by the framework.
1079 * @param dt data type of the file
1080 * @param spec data specification
1081 * @param capacity fraction of the available output buffer size
1082 * @return file handle, NULL if failed
1084 AliHLTMemoryFile* CreateMemoryFile(const AliHLTComponentDataType& dt=kAliHLTAnyDataType,
1085 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1086 float capacity=1.0);
1089 * Write an object to memory file in the output stream.
1090 * @param pFile file handle
1091 * @param pObject pointer to root object
1092 * @param key key in ROOT file
1093 * @param option options, see TObject::Write
1094 * @return neg. error code if failed
1095 * - -ENOSPC no space left
1097 int Write(AliHLTMemoryFile* pFile, const TObject* pObject, const char* key=NULL, int option=TObject::kOverwrite);
1100 * Close object memory file.
1101 * @param pFile file handle
1102 * @return neg. error code if failed
1103 * - -ENOSPC buffer size too small
1105 int CloseMemoryFile(AliHLTMemoryFile* pFile);
1108 * Insert event-done data information into the output.
1109 * @param edd event-done data information
1111 int CreateEventDoneData(AliHLTComponentEventDoneData edd);
1114 * Get current run number
1116 AliHLTUInt32_t GetRunNo() const;
1119 * Get the current run type.
1121 AliHLTUInt32_t GetRunType() const;
1124 * Get the chain id of the component.
1126 const char* GetChainId() const {return fChainId.c_str();}
1129 * Set a bit to 1 in a readout list ( = AliHLTEventDDL )
1130 * -> enable DDL for readout
1131 * @param list readout list
1132 * @param ddlId DDL Id to be turned on ( Decimal )
1134 void EnableDDLBit(AliHLTEventDDL &list, Int_t ddlId ) const {
1135 SetDDLBit( list, ddlId, kTRUE );
1139 * Set a bit to 0 in a readout list ( = AliHLTEventDDL )
1140 * -> disable DDL for readout
1141 * @param list readout list
1142 * @param ddlId DDL Id to be turned on ( Decimal )
1144 void DisableDDLBit(AliHLTEventDDL &list, Int_t ddlId ) const {
1145 SetDDLBit( list, ddlId, kFALSE );
1149 * Set or unset bit a readout list ( = AliHLTEventDDL )
1150 * -> enable or disable DDL for readout
1151 * @param list readout list
1152 * @param ddlId DDL Id to be turned on ( Decimal )
1153 * @param state kTRUE sets it, kFALSE unsets it
1155 void SetDDLBit(AliHLTEventDDL &list, Int_t ddlId, Bool_t state ) const;
1158 * Get the first word of a detector, which has a set DDL bit.
1159 * Beware, this only works if DDLs of 1 detector are set. In the
1160 * case of the TPC and TOF, which use 8 and 3 words, the first
1162 * @param list readout list
1163 * @return returns the detector index, -1 if no bit is set
1164 * at all or several detectors (=error)
1166 Int_t GetFirstUsedDDLWord(AliHLTEventDDL &list) const;
1169 * Copy a struct from block data.
1170 * The function checks for block size and struct size. The least common
1171 * size will be copied to the target struct, remaining fields are initialized
1173 * The target struct must have a 32bit struct size indicator as first member.
1174 * @param pStruct target struct
1175 * @param iStructSize size of the struct
1176 * @param iBlockNo index of input block
1177 * @param structname name of the struct (log messages)
1178 * @param eventname name of the event (log messages)
1179 * @return size copied, neg. error if failed
1181 int CopyStruct(void* pStruct, unsigned int iStructSize, unsigned int iBlockNo,
1182 const char* structname="", const char* eventname="");
1185 /** copy constructor prohibited */
1186 AliHLTComponent(const AliHLTComponent&);
1187 /** assignment operator prohibited */
1188 AliHLTComponent& operator=(const AliHLTComponent&);
1191 * Increment the internal event counter.
1192 * To be used by the friend classes AliHLTProcessor, AliHLTDataSource
1193 * and AliHLTDataSink.
1194 * @return new value of the internal event counter
1197 int IncrementEventCounter();
1200 * Find the first input block of specified data type beginning at index.
1201 * Input blocks containing a TObject have the size of the object as an
1202 * unsigned 32 bit number in the first 4 bytes. This has to match the block
1205 * kAliHLTAllDataTypes is a special data type which includes both
1206 * kAliHLTVoidDataType and kAliHLTAnyDataType.
1208 * @param dt data type
1209 * @param startIdx index to start the search
1210 * @param bObject check if this is an object
1211 * @return index of the block, -ENOENT if no block found
1215 int FindInputBlock(const AliHLTComponentDataType& dt, int startIdx=-1, int bObject=0) const;
1218 * Get index in the array of input bocks.
1219 * Calculate index and check integrety of a block data structure pointer.
1220 * @param pBlock pointer to block data
1221 * @return index of the block, -ENOENT if no block found
1225 int FindInputBlock(const AliHLTComponentBlockData* pBlock) const;
1228 * Create an object from a specified input block.
1229 * @param idx index of the input block
1230 * @param bForce force the retrieval of an object, error messages
1231 * are suppressed if \em bForce is not set
1232 * @return pointer to TObject, caller must delete the object after use
1236 TObject* CreateInputObject(int idx, int bForce=0);
1240 * Get object from the input block list. The methods first checks whether the
1241 * object was already created. If not, it is created by @ref CreateInputObject
1242 * and inserted into the list of objects.
1243 * @param idx index in the input block list
1244 * @param classname name of the class, object is checked for correct class
1246 * @param bForce force the retrieval of an object, error messages
1247 * are suppressed if \em bForce is not set
1248 * @return pointer to TObject
1252 TObject* GetInputObject(int idx, const char* classname=NULL, int bForce=0);
1255 * Clean the list of input objects.
1256 * Cleanup is done at the end of each event processing.
1258 int CleanupInputObjects();
1261 * Insert a buffer into the output block stream.
1262 * This is the only method to insert blocks into the output stream, called
1263 * from all types of the Pushback method. The actual data might have been
1264 * written to the output buffer already. In that case NULL can be provided
1265 * as buffer, only the block descriptor will be build. If a header is specified,
1266 * it will be inserted before the buffer, default is no header.
1267 * @param pBuffer pointer to buffer
1268 * @param iBufferSize size of the buffer in byte
1269 * @param dt data type
1270 * @param spec data specification
1271 * @param pHeader pointer to header
1272 * @param iHeaderSize size of Header
1273 * @return neg. error code if failed
1275 int InsertOutputBlock(void* pBuffer, int iBufferSize,
1276 const AliHLTComponentDataType& dt,
1277 AliHLTUInt32_t spec,
1278 void* pHeader=NULL, int iHeaderSize=0);
1281 * Add a component statistics block to the output.
1283 int AddComponentStatistics(AliHLTComponentBlockDataList& blocks,
1284 AliHLTUInt8_t* buffer,
1285 AliHLTUInt32_t bufferSize,
1286 AliHLTUInt32_t offset,
1287 AliHLTComponentStatisticsList& stats) const;
1289 /** The global component handler instance */
1290 static AliHLTComponentHandler* fgpComponentHandler; //! transient
1292 /** The environment where the component is running in */
1293 AliHLTComponentEnvironment fEnvironment; // see above
1295 /** Set by ProcessEvent before the processing starts */
1296 AliHLTEventID_t fCurrentEvent; // see above
1298 /** internal event no */
1299 int fEventCount; // see above
1301 /** the number of failed events */
1302 int fFailedEvents; // see above
1304 /** event data struct of the current event under processing */
1305 AliHLTComponentEventData fCurrentEventData; // see above
1307 /** array of input data blocks of the current event */
1308 const AliHLTComponentBlockData* fpInputBlocks; //! transient
1310 /** index of the current input block */
1311 int fCurrentInputBlock; // see above
1313 /** data type of the last block search */
1314 AliHLTComponentDataType fSearchDataType; // see above
1316 /** name of the class for the object to search for */
1317 string fClassName; // see above
1319 /** array of generated input objects */
1320 TObjArray* fpInputObjects; //! transient
1322 /** the output buffer */
1323 AliHLTUInt8_t* fpOutputBuffer; //! transient
1325 /** size of the output buffer */
1326 AliHLTUInt32_t fOutputBufferSize; // see above
1328 /** size of data written to output buffer */
1329 AliHLTUInt32_t fOutputBufferFilled; // see above
1331 /** list of ouput block data descriptors */
1332 AliHLTComponentBlockDataList fOutputBlocks; // see above
1334 /** stopwatch array */
1335 TObjArray* fpStopwatches; //! transient
1337 /** array of memory files AliHLTMemoryFile */
1338 AliHLTMemoryFilePList fMemFiles; //! transient
1340 /** descriptor of the current run */
1341 AliHLTRunDesc* fpRunDesc; //! transient
1343 /** the current DDL list */
1344 AliHLTEventDDL* fpDDLList; //! transient
1346 /** external fct to set CDB run no, indicates external CDB initialization */
1347 void* fCDBSetRunNoFunc; //! transient
1349 /** id of the component in the analysis chain */
1350 string fChainId; //! transient
1352 /** optional benchmarking for the component statistics */
1353 TStopwatch* fpBenchmark; //! transient
1355 /** component requires steering data blocks */
1356 bool fRequireSteeringBlocks; //! transient
1358 ClassDef(AliHLTComponent, 7)