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SOMobjects Base Toolkit: Programmer’s Reference Manual
create Method
Purpose
Creates a “reference” for a local application object which can be exported to remote clients.
IDL Syntax
typedef sequence<octet,1024> ReferenceData; // in somdtype.idl
SOMDObject create (
in ReferenceData id,
in InterfaceDef intf,
in ImplementationDef impl);
Description
The create method creates a SOMDObject which is used as a “reference” to a local
application object. An object reference is simply an object which is used to refer to another
target object — one may think of it as an “ID”, “link”, or “handle.” Object references are
important in DSOM in that their values can be externalized (that is, can be represented in a
string form) for transmission between processes, storage in files, and so on. In DSOM, the
proxy objects in client processes are remote object references.
To create an object reference, the caller specifies the ImplementationDef of the calling
process, the InterfaceDef of the target application object, and up to 1024 bytes of
ReferenceData which is used by the application to identify and activate the application
object. When subsequent method calls specify the object reference as a parameter, the
application will use the reference to find and/or activate the referenced object.
Note that (as specified in CORBA 1.1) each call to create returns a unique object reference,
even if the same parameters are used in subsequent calls. For each reference, the
ReferenceData is stored in the reference data file (and backup file, if any) for the server.
The SOMOA class introduces a change_id method which allows a server to modify the
ReferenceData of one of its references. (The change_id method is not in the CORBA 1.1
specification.)
Ownership of the returned SOMDObject is transferred to the caller.
Parameters
receiver A pointer to a BOA (SOMOA) object for the server.
env A pointer to the Environment structure for the method caller.
id A pointer to the ReferenceData structure containing application-specific
information describing the target object.
intf A pointer to the InterfaceDef object which describes the interface of the
target object.
impl A pointer to the ImplementationDef object which describes the application
(server) process which implements the target object.
- Bull DPX/20 1
- About This Book 5
- Contents 7
- SOM Kernel Reference 1-1 13
- C++ Example 15
- SOM Kernel Reference 1-5 17
- SOM Kernel Reference 1-9 21
- ++ language bindings 22
- SOM Kernel Reference 1-13 25
- SOM Kernel Reference 1-15 27
- SOM Kernel Reference 1-17 29
- SOM Kernel Reference 1-19 31
- SOM Kernel Reference 1-25 37
- SOM Kernel Reference 1-27 39
- ++ usage bindings use this 42
- ++ usage 42
- SOM Kernel Reference 1-33 45
- SOM Kernel Reference 1-35 47
- SOM Kernel Reference 1-37 49
- SOMCalloc Function 51
- SOMClassInitFuncName Function 52
- SOMDeleteModule Function 53
- SOMError Function 54
- SOMFree Function 55
- SOMInitModule Function 56
- SOMLoadModule Function 58
- SOMMalloc Function 59
- SOMOutCharRoutine Function 60
- SOMRealloc Function 61
- SOM_Assert Macro 62
- SOM_ClassLibrary Macro 63
- SOM Kernel Reference 1-53 65
- SOM_Error Macro 66
- SOM_Expect Macro 67
- SOM_GetClass Macro 68
- SOM_InitEnvironment Macro 69
- SOM_MainProgram Macro 70
- SOM_NoTrace Macro 71
- SOM_ParentNumResolve Macro 72
- SOM_Resolve Macro 73
- SOM_ResolveNoCheck Macro 74
- SOM_SubstituteClass Macro 75
- SOM_Test Macro 76
- SOM_TestC Macro 77
- SOM_UninitEnvironment Macro 78
- SOM_WarnMsg Macro 79
- SOMClass Class 80
- Introduced Methods 81
- Deprecated Methods 82
- SOM Kernel Reference 1-71 83
- SOM Kernel Reference 1-75 87
- SOM Kernel Reference 1-79 91
- SOM Kernel Reference 1-83 95
- SOM Kernel Reference 1-85 97
- SOM Kernel Reference 1-87 99
- SOM Kernel Reference 1-89 101
- NULL is returned 101
- SOM Kernel Reference 1-91 103
- SOM Kernel Reference 1-93 105
- SOM Kernel Reference 1-95 107
- SOM Kernel Reference 1-97 109
- SOM Kernel Reference 1-99 111
- Related Information 112
- Original Class 112
- SOM Kernel Reference 1-101 113
- IDL Syntax 114
- Description 114
- Parameters 114
- Return Value 114
- SOMClassMgr Class 117
- New Methods 118
- Overridden Methods 118
- SOM Kernel Reference 1-107 119
- Return Values 120
- C Example 121
- SOM Kernel Reference 1-117 129
- SOM Kernel Reference 1-123 135
- SOMObject Class 138
- SOM Kernel Reference 1-139 151
- SOM Kernel Reference 1-143 155
- SOM Kernel Reference 1-145 157
- SOM Kernel Reference 1-153 165
- DSOM Framework Reference 169
- DSOM and CORBA 170
- ORBfree Function 172
- C Syntax 173
- SOMD_Init Function 176
- SOMD_NoORBfree Function 177
- SOMD_Uninit Function 180
- Context_delete Macro 181
- Request_delete Macro 182
- BOA Class 184
- Context Class 196
- ImplementationDef Class 204
- ImplRepository Class 206
- NVList Class 218
- ObjectMgr Class 229
- ORB Class 235
- Principal Class 241
- Request Class 242
- SOMDClientProxy Class 253
- Overridden methods 254
- SOMDObject Class 263
- SOMDObjectMgr Class 276
- SOMDServer Class 281
- SOMDServerMgr Class 289
- _ServerDisabled or 293
- SOMOA Class 297
- _NoMessages is returned as 304
- AttributeDef Class 308
- Overriding Methods 309
- ConstantDef Class 310
- Contained Class 312
- Container Class 318
- ExceptionDef Class 325
- InterfaceDef Class 327
- Attributes 328
- ModuleDef Class 331
- OperationDef Class 332
- ParameterDef Class 334
- Repository Class 336
- TypeDef Class 342
- TypeCode_alignment Function 343
- TypeCode_copy Function 344
- TypeCode_equal Function 345
- TypeCode_free Function 346
- TypeCode_kind Function 347
- TypeCodeNew Function 350
- TypeCode_param_count Function 352
- TypeCode_parameter Function 353
- TypeCode_print Function 355
- TypeCode_size Function 357
- SOMMBeforeAfter Metaclass 360
- SOMMSingleInstance Metaclass 365
- ++, or the somNew method 366
- SOMMTraced Metaclass 367
- SOMEClientEvent Class 370
- SOMEEMan Class 375
- SOMEEMRegisterData Class 391
- SOMEEvent Class 399
- SOMESinkEvent Class 404
- SOMETimerEvent Class 407
- SOMEWorkProcEvent Class 410
- NOM / NAME : Date : 419
- SOCIETE / COMPANY : 419
- ADRESSE / ADDRESS : 419
- 86 A2 28AQ 01 422
- ORDER REFERENCE 422
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