started the new framework module supporting PubSub and AliRoot
[u/mrichter/AliRoot.git] / HLT / BASE / AliHLTComponentHandler.h
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f23a6e1a 1// @(#) $Id$
2
3#ifndef ALIHLTCOMPONENTHANDLER_H
4#define ALIHLTCOMPONENTHANDLER_H
5/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
6 * See cxx source for full Copyright notice */
7
8/* AliHltcomponentHandler
9 handler of HLT processing components
10 */
11
12#include "TObject.h"
13#include "AliHLTDataTypes.h"
14
15class AliHLTComponent;
16struct AliHLTComponentEnvironment;
17struct AliHLTComponent_DataType;
18
19typedef void* AliHLTLibHandle;
20
21class AliHLTComponentHandler {
22 public:
23 AliHLTComponentHandler();
24 virtual ~AliHLTComponentHandler();
25
26 void SetEnvironment(AliHLTComponentEnvironment* pEnv);
27
28 // Load a component shared library
29 int LoadLibrary( const char* libraryPath );
30 int UnloadLibrary( const char* libraryPath );
31
32 /* Component registration funcions
33 * registration is done by passing a sample object of the component to the handler
34 * the object has to be valid during the whole runtime and should thus be a global object
35 */
36 // Schedule a component for registration, full registration will be done
37 // after successfull loading of the shared library
38 int ScheduleRegister(AliHLTComponent* pSample );
39
40 // Register a component with the list of available components
41 int RegisterComponent(AliHLTComponent* pSample );
42 int DeregisterComponent( const char* componentID );
43
44 // Find the ID of a component with the given output data
45 // prevType can be used to iterate if there are multiple components with the same output data type.
46 const char* FindComponentType( AliHLTComponent_DataType, const char* prevType = NULL ) { return NULL;}
47
48 // Create a component of the given name
49 int CreateComponent( const char* componentType, void* environ_param, int argc, const char** argv, AliHLTComponent*& component );
50 int CreateComponent( const char* componentType, void* environ_param, AliHLTComponent*& component ) {
51 return CreateComponent( componentType, environ_param, 0, NULL, component );
52 }
53
54 /* print registered components to stdout
55 */
56 void List();
57 protected:
58 int Logging( AliHLTComponent_LogSeverity severity, const char* origin, const char* keyword, const char* message, ... );
59
60 private:
61 /* find a component
62 return index
63 */
64 int FindComponentIndex(const char* componentID);
65
66 /* find a component
67 return descriptor
68 */
69 AliHLTComponent* FindComponent(const char* componentID);
70
71 int InsertComponent(AliHLTComponent* pSample);
72
73 // close all libraries
74 int UnloadLibraries();
75
76 /* list of registered components
77 */
78 vector<AliHLTComponent*> fComponentList;
79
80 /* list of scheduled components
81 */
82 vector<AliHLTComponent*> fScheduleList;
83
84 /* list of libraries
85 */
86 vector<AliHLTLibHandle> fLibraryList;
87
88 AliHLTComponentEnvironment fEnvironment;
89
90 ClassDef(AliHLTComponentHandler, 0)
91 };
92#endif
93