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 AliHLTProcessor 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 AliHLTDataSink 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 write 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 too 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 AliHLTAnalysisEnvironment* 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 * Calculate a CRC checksum of a data buffer.
509 * Polynomial for the calculation is 0xD8.
511 static AliHLTUInt32_t CalculateChecksum(const AliHLTUInt8_t* buffer, int size);
514 * Helper function to print content of data type.
516 static void PrintDataTypeContent(AliHLTComponentDataType& dt, const char* format=NULL);
519 * helper function to initialize AliHLTComponentEventData structure
521 static void FillEventData(AliHLTComponentEventData& evtData);
524 * Print info on an AliHLTComponentDataType structure
525 * This is just a helper function to examine an @ref AliHLTComponentDataType
528 static void PrintComponentDataTypeInfo(const AliHLTComponentDataType& dt);
531 * Fill AliHLTComponentBlockData structure with default values.
532 * @param blockData reference to data structure
534 static void FillBlockData( AliHLTComponentBlockData& blockData );
537 * Fill AliHLTComponentShmData structure with default values.
538 * @param shmData reference to data structure
540 static void FillShmData( AliHLTComponentShmData& shmData );
543 * Fill AliHLTComponentDataType structure with default values.
544 * @param dataType reference to data structure
546 static void FillDataType( AliHLTComponentDataType& dataType );
549 * Copy data type structure
550 * Copies the value an AliHLTComponentDataType structure to another one
551 * @param[out] tgtdt target structure
552 * @param[in] srcdt source structure
554 static void CopyDataType(AliHLTComponentDataType& tgtdt, const AliHLTComponentDataType& srcdt);
557 * Set the ID and Origin of an AliHLTComponentDataType structure.
558 * The function sets the fStructureSize member and copies the strings
559 * to the ID and Origin. Only characters from the valid part of the string
560 * are copied, the rest is filled with 0's. <br>
561 * Please note that the fID and fOrigin members are not strings, just arrays of
562 * chars of size @ref kAliHLTComponentDataTypefIDsize and
563 * @ref kAliHLTComponentDataTypefOriginSize respectively and not necessarily with
564 * a terminating zero. <br>
565 * It is possible to pass NULL pointers as id or origin argument, in that case they
567 * @param tgtdt target data type structure
568 * @param id ID string
569 * @param origin Origin string
571 static void SetDataType(AliHLTComponentDataType& tgtdt, const char* id, const char* origin);
574 * Set the ID and Origin of an AliHLTComponentDataType structure.
575 * Given the fact that the data type ID is 64bit wide and origin 32, this helper
576 * function sets the data type from those two parameters.
577 * @param dt target data type structure
579 * @param orig 32bit origin
581 static void SetDataType(AliHLTComponentDataType& dt, AliHLTUInt64_t id, AliHLTUInt32_t orig);
584 * Extract a component table entry from the payload buffer.
585 * The entry consists of the AliHLTComponentTableEntry structure, the array of
586 * parents and a description string of the format 'chain-id{component-id:component-args}'.
587 * The function fills all the variables after a consistency check.
589 static int ExtractComponentTableEntry(const AliHLTUInt8_t* pBuffer, AliHLTUInt32_t size,
590 string& chainId, string& compId, string& compParam,
591 vector<AliHLTUInt32_t>& parents);
593 * Stopwatch type for benchmarking.
595 enum AliHLTStopwatchType {
596 /** total time for event processing */
598 /** detector algorithm w/o interface callbacks */
604 /** number of types */
609 * Helper class for starting and stopping a stopwatch.
610 * The guard can be used by instantiating an object in a function. The
611 * specified stopwatch is started and the previous stopwatch put on
612 * hold. When the function is terminated, the object is deleted automatically
613 * deleted, stopping the stopwatch and starting the one on hold.<br>
614 * \em IMPORTANT: never create dynamic objects from this guard as this violates
615 * the idea of a guard.
617 class AliHLTStopwatchGuard {
619 /** standard constructor (not for use) */
620 AliHLTStopwatchGuard();
622 AliHLTStopwatchGuard(TStopwatch* pStart);
623 /** copy constructor (not for use) */
624 AliHLTStopwatchGuard(const AliHLTStopwatchGuard&);
625 /** assignment operator (not for use) */
626 AliHLTStopwatchGuard& operator=(const AliHLTStopwatchGuard&);
628 ~AliHLTStopwatchGuard();
632 * Hold the previous guard for the existence of this guard.
633 * Checks whether this guard controls a new stopwatch. In that case, the
634 * previous guard and its stopwatch are put on hold.
635 * @param pSucc instance of the stopwatch of the new guard
636 * @return 1 if pSucc is a different stopwatch which should
638 * 0 if it controls the same stopwatch
640 int Hold(TStopwatch* pSucc);
643 * Resume the previous guard.
644 * Checks whether the peceeding guard controls a different stopwatch. In that
645 * case, the its stopwatch is resumed.
646 * @param pSucc instance of the stopwatch of the new guard
647 * @return 1 if pSucc is a different stopwatch which should
649 * 0 if it controls the same stopwatch
651 int Resume(TStopwatch* pSucc);
653 /** the stopwatch controlled by this guard */
654 TStopwatch* fpStopwatch; //!transient
656 /** previous stopwatch guard, put on hold during existence of the guard */
657 AliHLTStopwatchGuard* fpPrec; //!transient
659 /** active stopwatch guard */
660 static AliHLTStopwatchGuard* fgpCurrent; //!transient
664 * Set a stopwatch for a given purpose.
665 * @param pSW stopwatch object
666 * @param type type of the stopwatch
668 int SetStopwatch(TObject* pSW, AliHLTStopwatchType type=kSWBase);
671 * Init a set of stopwatches.
672 * @param pStopwatches object array of stopwatches
674 int SetStopwatches(TObjArray* pStopwatches);
679 * Default method for the internal initialization.
680 * The method is called by @ref Init
682 virtual int DoInit( int argc, const char** argv );
685 * Default method for the internal clean-up.
686 * The method is called by @ref Deinit
688 virtual int DoDeinit();
691 * Reconfigure the component.
692 * The method is called when an event of type @ref kAliHLTDataTypeComConf
693 * {COM_CONF:PRIV} is received by the component. If the event is sent as
694 * part of a normal event, the component configuration is called first.
696 * The CDB path parameter specifies the path in the CDB, i.e. without
697 * leading absolute path of the CDB location. The framework might alse
698 * provide the id of the component in the analysis chain.
700 * \b Note: The CDB will be initialized by the framework, either already set
701 * from AliRoot or from the wrapper interface during initialization.
703 * @param cdbEntry path of the cdbEntry
704 * @param chainId the id/name of the component in the current analysis
705 * chain. This is not necessarily the same as what is
706 * returned by the GetComponentID() method.
707 * @note both parameters can be NULL, check before usage
709 virtual int Reconfigure(const char* cdbEntry, const char* chainId);
712 * Read the Preprocessor values.
713 * The function is invoked when the component is notified about available/
714 * updated data points from the detector Preprocessors. The 'modules'
715 * argument contains all detectors for which the Preprocessors have
716 * updated data points. The component has to implement the CDB access to
717 * get the desired data points.
718 * @param modules detectors for which the Preprocessors have updated
719 * data points: TPC, TRD, ITS, PHOS, MUON, or ALL if
720 * no argument was received.
721 * @return neg. error code if failed
723 virtual int ReadPreprocessorValues(const char* modules);
726 * Custom handler for the SOR event.
727 * Is invoked from the base class if an SOR event is in the block list.
728 * The handler is called before the processing function. The processing
729 * function is skipped if there are no other data blocks available.
731 * The SOR event is generated by the PubSub framework in response to
732 * the DAQ start of data (SOD - has been renamed after HLT interface
733 * was designed). The SOD event consists of 3 blocks:
734 * - ::kAliHLTDataTypeEvent block: spec ::gkAliEventTypeStartOfRun
735 * - SOD block of type ::kAliHLTDataTypeSOR, payload: AliHLTRunDesc struct
736 * - run type block ::kAliHLTDataTypeRunType, payload: run type string
738 * Run properties can be retrieved by getters like GetRunNo().
739 * @return neg. error code if failed
741 virtual int StartOfRun();
744 * Custom handler for the EOR event.
745 * Is invoked from the base class if an EOR event is in the block list.
746 * The handler is called before the processing function. The processing
747 * function is skipped if there are no other data blocks available.
749 * See StartOfRun() for mor ecomments of the sequence of steering events.
751 * @return neg. error code if failed
753 virtual int EndOfRun();
756 * Check whether a component requires all steering blocks.
757 * Childs can overload in order to indicate that they want to
758 * receive also the steering data blocks. There is also the
759 * possibility to add the required data types to the input
760 * data type list in GetInputDataTypes().
762 virtual bool RequireSteeringBlocks() const {return false;}
765 * General memory allocation method.
766 * All memory which is going to be used 'outside' of the interface must
767 * be provided by the framework (online or offline).
768 * The method is redirected to a function provided by the current
769 * framework. Function pointers are transferred via the @ref
770 * AliHLTAnalysisEnvironment structure.
772 void* AllocMemory( unsigned long size );
775 * Helper function to create a monolithic BlockData description block out
776 * of a list BlockData descriptors.
777 * For convenience, inside the interface vector lists are used, to make the
778 * interface pure C style, monilithic blocks must be exchanged.
779 * The method is redirected to a function provided by the current
780 * framework. Function pointers are transferred via the @ref
781 * AliHLTAnalysisEnvironment structure.
783 int MakeOutputDataBlockList( const AliHLTComponentBlockDataList& blocks, AliHLTUInt32_t* blockCount,
784 AliHLTComponentBlockData** outputBlocks );
787 * Fill the EventDoneData structure.
788 * The method is redirected to a function provided by the current
789 * framework. Function pointers are transferred via the @ref
790 * AliHLTAnalysisEnvironment structure.
792 int GetEventDoneData( unsigned long size, AliHLTComponentEventDoneData** edd );
795 * Helper function to convert the data type to a string.
797 void DataType2Text(const AliHLTComponentDataType& type, char output[kAliHLTComponentDataTypefIDsize+kAliHLTComponentDataTypefOriginSize+2]) const;
801 * @return value of the internal event counter
803 int GetEventCount() const;
806 * Get the number of input blocks.
807 * @return number of input blocks
809 int GetNumberOfInputBlocks() const;
812 * Get the first object of a specific data type from the input data.
813 * The hight-level methods provide functionality to transfer ROOT data
814 * structures which inherit from TObject.
816 * The method looks for the first ROOT object of type dt in the input stream.
817 * If also the class name is provided, the object is checked for the right
818 * class type. The input data block needs a certain structure, namely the
819 * buffer size as first word. If the cross check fails, the retrieval is
820 * silently abondoned, unless the \em bForce parameter is set.<br>
821 * \b Note: THE OBJECT MUST NOT BE DELETED by the caller.
823 * If called without parameters, the function tries to create objects from
824 * all available input blocks, also the ones of data type kAliHLTVoidDataType
825 * which are not matched by kAliHLTAnyDataType.
827 * @param dt data type of the object
828 * @param classname class name of the object
829 * @param bForce force the retrieval of an object, error messages
830 * are suppressed if \em bForce is not set
831 * @return pointer to @ref TObject, NULL if no objects of specified type
834 const TObject* GetFirstInputObject(const AliHLTComponentDataType& dt=kAliHLTAllDataTypes,
835 const char* classname=NULL,
839 * Get the first 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 first ROOT object of type specified by the ID and
843 * Origin strings in the input stream.
844 * If also the class name is provided, the object is checked for the right
845 * class type. The input data block needs a certain structure, namely the
846 * buffer size as first word. If the cross check fails, the retrieval is
847 * silently abondoned, unless the \em bForce parameter is set.<br>
848 * \em Note: THE OBJECT MUST NOT BE DELETED by the caller.
849 * @param dtID data type ID of the object
850 * @param dtOrigin data type origin of the object
851 * @param classname class name of the object
852 * @param bForce force the retrieval of an object, error messages
853 * are suppressed if \em bForce is not set
854 * @return pointer to @ref TObject, NULL if no objects of specified type
857 const TObject* GetFirstInputObject(const char* dtID,
858 const char* dtOrigin,
859 const char* classname=NULL,
863 * Get the next object of a specific data type from the input data.
864 * The hight-level methods provide functionality to transfer ROOT data
865 * structures which inherit from TObject.
866 * The method looks for the next ROOT object of type and class specified
867 * to the previous @ref GetFirstInputObject call.<br>
868 * \em Note: THE OBJECT MUST NOT BE DELETED by the caller.
869 * @param bForce force the retrieval of an object, error messages
870 * are suppressed if \em bForce is not set
871 * @return pointer to @ref TObject, NULL if no more objects available
873 const TObject* GetNextInputObject(int bForce=0);
876 * Get data type of an input block.
877 * Get data type of the object previously fetched via
878 * GetFirstInputObject/NextInputObject or the last one if no object
880 * @param pObject pointer to TObject
881 * @return data specification, kAliHLTVoidDataSpec if failed
883 AliHLTComponentDataType GetDataType(const TObject* pObject=NULL);
886 * Get data specification of an input block.
887 * Get data specification of the object previously fetched via
888 * GetFirstInputObject/NextInputObject or the last one if no object
890 * @param pObject pointer to TObject
891 * @return data specification, kAliHLTVoidDataSpec if failed
893 AliHLTUInt32_t GetSpecification(const TObject* pObject=NULL);
896 * Get the first block of a specific data type from the input data.
897 * The method looks for the first block of type dt in the input stream.
898 * It is intended to be used within the high-level interface.<br>
899 * \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller.
901 * If called without parameters, the function works on all input blocks,
902 * also the ones of data type kAliHLTVoidDataType which are not matched by
903 * kAliHLTAnyDataType.
905 * @param dt data type of the block
906 * @return pointer to @ref AliHLTComponentBlockData
908 const AliHLTComponentBlockData* GetFirstInputBlock(const AliHLTComponentDataType& dt=kAliHLTAllDataTypes);
911 * Get the first block of a specific data type from the input data.
912 * The method looks for the first block of type specified by the ID and
913 * Origin strings in the input stream. It is intended
914 * to be used within the high-level interface.<br>
915 * \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller.
916 * @param dtID data type ID of the block
917 * @param dtOrigin data type origin of the block
918 * @return pointer to @ref AliHLTComponentBlockData
920 const AliHLTComponentBlockData* GetFirstInputBlock(const char* dtID,
921 const char* dtOrigin);
924 * Get input block by index.<br>
925 * \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller.
926 * @return pointer to AliHLTComponentBlockData, NULL if index out of range
928 const AliHLTComponentBlockData* GetInputBlock(int index) const;
931 * Get the next block of a specific data type from the input data.
932 * The method looks for the next block of type and class specified
933 * to the previous @ref GetFirstInputBlock call.
934 * To be used within the high-level interface.<br>
935 * \em Note: THE BLOCK DESCRIPTOR MUST NOT BE DELETED by the caller.
937 const AliHLTComponentBlockData* GetNextInputBlock();
940 * Get data specification of an input block.
941 * Get data specification of the input bblock previously fetched via
942 * GetFirstInputObject/NextInputObject or the last one if no block
944 * @param pBlock pointer to input block
945 * @return data specification, kAliHLTVoidDataSpec if failed
947 AliHLTUInt32_t GetSpecification(const AliHLTComponentBlockData* pBlock=NULL);
950 * Forward an input object to the output.
951 * Forward the input block of an object previously fetched via
952 * GetFirstInputObject/NextInputObject or the last one if no object
954 * The block descriptor of the input block is forwarded to the
956 * @param pObject pointer to TObject
957 * @return neg. error code if failed
959 int Forward(const TObject* pObject);
962 * Forward an input block to the output.
963 * Forward the input block fetched via GetFirstInputObject/
964 * NextInputBlock or the last one if no block specified.
965 * The block descriptor of the input block is forwarded to the
967 * @param pBlock pointer to input block
968 * @return neg. error code if failed
970 int Forward(const AliHLTComponentBlockData* pBlock=NULL);
973 * Insert an object into the output.
974 * If header is specified, it will be inserted before the root object,
975 * default is no header.
976 * @param pObject pointer to root object
977 * @param dt data type of the object
978 * @param spec data specification
979 * @param pHeader pointer to header
980 * @param headerSize size of Header
981 * @return neg. error code if failed
983 int PushBack(TObject* pObject, const AliHLTComponentDataType& dt,
984 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
985 void* pHeader=NULL, int headerSize=0);
988 * Insert an object into the output.
989 * If header is specified, it will be inserted before the root object,
990 * default is no header.
991 * @param pObject pointer to root object
992 * @param dtID data type ID of the object
993 * @param dtOrigin data type origin of the object
994 * @param spec data specification
995 * @param pHeader pointer to header
996 * @param headerSize size of Header
997 * @return neg. error code if failed
999 int PushBack(TObject* pObject, const char* dtID, const char* dtOrigin,
1000 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1001 void* pHeader=NULL, int headerSize=0);
1004 * Insert an object into the output.
1005 * @param pBuffer pointer to buffer
1006 * @param iSize size of the buffer
1007 * @param dt data type of the object
1008 * @param spec data specification
1009 * @param pHeader pointer to header
1010 * @param headerSize size of Header
1011 * @return neg. error code if failed
1013 int PushBack(const void* pBuffer, int iSize, const AliHLTComponentDataType& dt,
1014 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1015 const void* pHeader=NULL, int headerSize=0);
1018 * Insert an object into the output.
1019 * @param pBuffer pointer to buffer
1020 * @param iSize size of the buffer
1021 * @param dtID data type ID of the object
1022 * @param dtOrigin data type origin of the object
1023 * @param spec data specification
1024 * @param pHeader pointer to header
1025 * @param headerSize size of Header
1026 * @return neg. error code if failed
1028 int PushBack(const void* pBuffer, int iSize, const char* dtID, const char* dtOrigin,
1029 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1030 const void* pHeader=NULL, int headerSize=0);
1033 * Estimate size of a TObject
1035 * @return buffer size in byte
1037 int EstimateObjectSize(TObject* pObject) const;
1040 * Create a memory file in the output stream.
1041 * This method creates a TFile object which stores all data in
1042 * memory instead of disk. The TFile object is published as binary data.
1043 * The instance can be used like a normal TFile object. The TFile::Close
1044 * or @ref CloseMemoryFile method has to be called in order to flush the
1047 * \b Note: The returned object is deleted by the framework.
1048 * @param capacity total size reserved for the memory file
1049 * @param dtID data type ID of the file
1050 * @param dtOrigin data type origin of the file
1051 * @param spec data specification
1052 * @return file handle, NULL if failed
1054 AliHLTMemoryFile* CreateMemoryFile(int capacity, const char* dtID, const char* dtOrigin,
1055 AliHLTUInt32_t spec=kAliHLTVoidDataSpec);
1058 * Create a memory file in the output stream.
1059 * This method creates a TFile object which stores all data in
1060 * memory instead of disk. The TFile object is published as binary data.
1061 * The instance can be used like a normal TFile object. The TFile::Close
1062 * or @ref CloseMemoryFile method has to be called in order to flush the
1065 * \b Note: The returned object is deleted by the framework.
1066 * @param capacity total size reserved for the memory file
1067 * @param dt data type of the file
1068 * @param spec data specification
1069 * @return file handle, NULL if failed
1071 AliHLTMemoryFile* CreateMemoryFile(int capacity,
1072 const AliHLTComponentDataType& dt=kAliHLTAnyDataType,
1073 AliHLTUInt32_t spec=kAliHLTVoidDataSpec);
1076 * Create a memory file in the output stream.
1077 * This method creates a TFile object which stores all data in
1078 * memory instead of disk. The TFile object is published as binary data.
1079 * The instance can be used like a normal TFile object. The TFile::Close
1080 * or @ref CloseMemoryFile method has to be called in order to flush the
1083 * \b Note: The returned object is deleted by the framework.
1084 * @param dtID data type ID of the file
1085 * @param dtOrigin data type origin of the file
1086 * @param spec data specification
1087 * @param capacity fraction of the available output buffer size
1088 * @return file handle, NULL if failed
1090 AliHLTMemoryFile* CreateMemoryFile(const char* dtID, const char* dtOrigin,
1091 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1092 float capacity=1.0);
1095 * Create a memory file in the output stream.
1096 * This method creates a TFile object which stores all data in
1097 * memory instead of disk. The TFile object is published as binary data.
1098 * The instance can be used like a normal TFile object. The TFile::Close
1099 * or @ref CloseMemoryFile method has to be called in order to flush the
1102 * \b Note: The returned object is deleted by the framework.
1103 * @param dt data type of the file
1104 * @param spec data specification
1105 * @param capacity fraction of the available output buffer size
1106 * @return file handle, NULL if failed
1108 AliHLTMemoryFile* CreateMemoryFile(const AliHLTComponentDataType& dt=kAliHLTAnyDataType,
1109 AliHLTUInt32_t spec=kAliHLTVoidDataSpec,
1110 float capacity=1.0);
1113 * Write an object to memory file in the output stream.
1114 * @param pFile file handle
1115 * @param pObject pointer to root object
1116 * @param key key in ROOT file
1117 * @param option options, see TObject::Write
1118 * @return neg. error code if failed
1119 * - -ENOSPC no space left
1121 int Write(AliHLTMemoryFile* pFile, const TObject* pObject, const char* key=NULL, int option=TObject::kOverwrite);
1124 * Close object memory file.
1125 * @param pFile file handle
1126 * @return neg. error code if failed
1127 * - -ENOSPC buffer size too small
1129 int CloseMemoryFile(AliHLTMemoryFile* pFile);
1132 * Insert event-done data information into the output.
1133 * @param edd event-done data information
1135 int CreateEventDoneData(AliHLTComponentEventDoneData edd);
1138 * Get current run number
1140 AliHLTUInt32_t GetRunNo() const;
1143 * Get the current run type.
1145 AliHLTUInt32_t GetRunType() const;
1148 * Get the chain id of the component.
1150 const char* GetChainId() const {return fChainId.c_str();}
1153 * Check whether the current event is a valid data event.
1154 * @param pTgt optional pointer to get the event type
1155 * @return true if the current event is a real data event
1157 bool IsDataEvent(AliHLTUInt32_t* pTgt=NULL);
1160 * Set a bit to 1 in a readout list ( = AliHLTEventDDL )
1161 * -> enable DDL for readout
1162 * @param list readout list
1163 * @param ddlId DDL Id to be turned on ( Decimal )
1165 void EnableDDLBit(AliHLTEventDDL &list, Int_t ddlId ) const {
1166 SetDDLBit( list, ddlId, kTRUE );
1170 * Set a bit to 0 in a readout list ( = AliHLTEventDDL )
1171 * -> disable DDL for readout
1172 * @param list readout list
1173 * @param ddlId DDL Id to be turned on ( Decimal )
1175 void DisableDDLBit(AliHLTEventDDL &list, Int_t ddlId ) const {
1176 SetDDLBit( list, ddlId, kFALSE );
1180 * Set or unset bit a readout list ( = AliHLTEventDDL )
1181 * -> enable or disable DDL for readout
1182 * @param list readout list
1183 * @param ddlId DDL Id to be turned on ( Decimal )
1184 * @param state kTRUE sets it, kFALSE unsets it
1186 void SetDDLBit(AliHLTEventDDL &list, Int_t ddlId, Bool_t state ) const;
1189 * Get the first word of a detector, which has a set DDL bit.
1190 * Beware, this only works if DDLs of 1 detector are set. In the
1191 * case of the TPC and TOF, which use 8 and 3 words, the first
1193 * @param list readout list
1194 * @return returns the detector index, -1 if no bit is set
1195 * at all or several detectors (=error)
1197 Int_t GetFirstUsedDDLWord(AliHLTEventDDL &list) const;
1200 * Copy a struct from block data.
1201 * The function checks for block size and struct size. The least common
1202 * size will be copied to the target struct, remaining fields are initialized
1204 * The target struct must have a 32bit struct size indicator as first member.
1205 * @param pStruct target struct
1206 * @param iStructSize size of the struct
1207 * @param iBlockNo index of input block
1208 * @param structname name of the struct (log messages)
1209 * @param eventname name of the event (log messages)
1210 * @return size copied, neg. error if failed
1212 int CopyStruct(void* pStruct, unsigned int iStructSize, unsigned int iBlockNo,
1213 const char* structname="", const char* eventname="");
1216 /** copy constructor prohibited */
1217 AliHLTComponent(const AliHLTComponent&);
1218 /** assignment operator prohibited */
1219 AliHLTComponent& operator=(const AliHLTComponent&);
1222 * Increment the internal event counter.
1223 * To be used by the friend classes AliHLTProcessor, AliHLTDataSource
1224 * and AliHLTDataSink.
1225 * @return new value of the internal event counter
1228 int IncrementEventCounter();
1231 * Find the first input block of specified data type beginning at index.
1232 * Input blocks containing a TObject have the size of the object as an
1233 * unsigned 32 bit number in the first 4 bytes. This has to match the block
1236 * kAliHLTAllDataTypes is a special data type which includes both
1237 * kAliHLTVoidDataType and kAliHLTAnyDataType.
1239 * @param dt data type
1240 * @param startIdx index to start the search
1241 * @param bObject check if this is an object
1242 * @return index of the block, -ENOENT if no block found
1246 int FindInputBlock(const AliHLTComponentDataType& dt, int startIdx=-1, int bObject=0) const;
1249 * Get index in the array of input bocks.
1250 * Calculate index and check integrety of a block data structure pointer.
1251 * @param pBlock pointer to block data
1252 * @return index of the block, -ENOENT if no block found
1256 int FindInputBlock(const AliHLTComponentBlockData* pBlock) const;
1259 * Create an object from a specified input block.
1260 * @param idx index of the input block
1261 * @param bForce force the retrieval of an object, error messages
1262 * are suppressed if \em bForce is not set
1263 * @return pointer to TObject, caller must delete the object after use
1267 TObject* CreateInputObject(int idx, int bForce=0);
1271 * Get object from the input block list. The methods first checks whether the
1272 * object was already created. If not, it is created by @ref CreateInputObject
1273 * and inserted into the list of objects.
1274 * @param idx index in the input block list
1275 * @param classname name of the class, object is checked for correct class
1277 * @param bForce force the retrieval of an object, error messages
1278 * are suppressed if \em bForce is not set
1279 * @return pointer to TObject
1283 TObject* GetInputObject(int idx, const char* classname=NULL, int bForce=0);
1286 * Clean the list of input objects.
1287 * Cleanup is done at the end of each event processing.
1289 int CleanupInputObjects();
1292 * Insert a buffer into the output block stream.
1293 * This is the only method to insert blocks into the output stream, called
1294 * from all types of the Pushback method. The actual data might have been
1295 * written to the output buffer already. In that case NULL can be provided
1296 * as buffer, only the block descriptor will be build. If a header is specified,
1297 * it will be inserted before the buffer, default is no header.
1298 * @param pBuffer pointer to buffer
1299 * @param iBufferSize size of the buffer in byte
1300 * @param dt data type
1301 * @param spec data specification
1302 * @param pHeader pointer to header
1303 * @param iHeaderSize size of Header
1304 * @return neg. error code if failed
1306 int InsertOutputBlock(const void* pBuffer, int iBufferSize,
1307 const AliHLTComponentDataType& dt,
1308 AliHLTUInt32_t spec,
1309 const void* pHeader=NULL, int iHeaderSize=0);
1312 * Add a component statistics block to the output.
1313 * @return size of the added data
1315 int AddComponentStatistics(AliHLTComponentBlockDataList& blocks,
1316 AliHLTUInt8_t* buffer,
1317 AliHLTUInt32_t bufferSize,
1318 AliHLTUInt32_t offset,
1319 AliHLTComponentStatisticsList& stats) const;
1322 * Add a component table entry (descriptor) to the output
1323 * This is done at SOR/EOR. The component table is a list of chain ids
1324 * and 32bit ids calculated by a crc algorithm from the chian id. This
1325 * allows to tag data blocks with the id number rather than the string.
1327 * The kAliHLTDataTypeComponentTable data block currently has the string
1328 * as payload and the crc id as specification.
1329 * @return size of the added data
1331 int AddComponentTableEntry(AliHLTComponentBlockDataList& blocks,
1332 AliHLTUInt8_t* buffer,
1333 AliHLTUInt32_t bufferSize,
1334 AliHLTUInt32_t offset,
1335 const vector<AliHLTUInt32_t>& parents) const;
1337 /** The global component handler instance */
1338 static AliHLTComponentHandler* fgpComponentHandler; //! transient
1340 /** The environment where the component is running in */
1341 AliHLTAnalysisEnvironment fEnvironment; // see above
1343 /** Set by ProcessEvent before the processing starts */
1344 AliHLTEventID_t fCurrentEvent; // see above
1346 /** internal event no */
1347 int fEventCount; // see above
1349 /** the number of failed events */
1350 int fFailedEvents; // see above
1352 /** event data struct of the current event under processing */
1353 AliHLTComponentEventData fCurrentEventData; // see above
1355 /** array of input data blocks of the current event */
1356 const AliHLTComponentBlockData* fpInputBlocks; //! transient
1358 /** index of the current input block */
1359 int fCurrentInputBlock; // see above
1361 /** data type of the last block search */
1362 AliHLTComponentDataType fSearchDataType; // see above
1364 /** name of the class for the object to search for */
1365 string fClassName; // see above
1367 /** array of generated input objects */
1368 TObjArray* fpInputObjects; //! transient
1370 /** the output buffer */
1371 AliHLTUInt8_t* fpOutputBuffer; //! transient
1373 /** size of the output buffer */
1374 AliHLTUInt32_t fOutputBufferSize; // see above
1376 /** size of data written to output buffer */
1377 AliHLTUInt32_t fOutputBufferFilled; // see above
1379 /** list of ouput block data descriptors */
1380 AliHLTComponentBlockDataList fOutputBlocks; // see above
1382 /** stopwatch array */
1383 TObjArray* fpStopwatches; //! transient
1385 /** array of memory files AliHLTMemoryFile */
1386 AliHLTMemoryFilePList fMemFiles; //! transient
1388 /** descriptor of the current run */
1389 AliHLTRunDesc* fpRunDesc; //! transient
1391 /** the current DDL list */
1392 AliHLTEventDDL* fpDDLList; //! transient
1394 /** external fct to set CDB run no, indicates external CDB initialization */
1395 void* fCDBSetRunNoFunc; //! transient
1397 /** id of the component in the analysis chain */
1398 string fChainId; //! transient
1400 /** crc value of the chainid, used as a 32bit id */
1401 AliHLTUInt32_t fChainIdCrc; //! transient
1403 /** optional benchmarking for the component statistics */
1404 TStopwatch* fpBenchmark; //! transient
1406 /** component requires steering data blocks */
1407 bool fRequireSteeringBlocks; //! transient
1409 /** current event type */
1410 AliHLTUInt32_t fEventType; //! transient
1412 /** component arguments */
1413 string fComponentArgs; //! transient
1415 ClassDef(AliHLTComponent, 8)