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TGrid.cxx
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1 // @(#)root/net:$Id$
2 // Author: Fons Rademakers 3/1/2002
3 
4 /*************************************************************************
5  * Copyright (C) 1995-2002, Rene Brun and Fons Rademakers. *
6  * All rights reserved. *
7  * *
8  * For the licensing terms see $ROOTSYS/LICENSE. *
9  * For the list of contributors see $ROOTSYS/README/CREDITS. *
10  *************************************************************************/
11 
12 //////////////////////////////////////////////////////////////////////////
13 // //
14 // TGrid //
15 // //
16 // Abstract base class defining interface to common GRID services. //
17 // //
18 // To open a connection to a GRID use the static method Connect(). //
19 // The argument of Connect() is of the form: //
20 // <grid>[://<host>][:<port>], e.g. alien://alice.cern.ch //
21 // Depending on the <grid> specified an appropriate plugin library //
22 // will be loaded which will provide the real interface. //
23 // //
24 // Related classes are TGridResult. //
25 // //
26 //////////////////////////////////////////////////////////////////////////
27 
28 #include "TGrid.h"
29 #include "TROOT.h"
30 #include "TPluginManager.h"
31 #include "TError.h"
32 
33 TGrid *gGrid = 0;
34 
35 
37 
38 ////////////////////////////////////////////////////////////////////////////////
39 /// The grid should be of the form: <grid>://<host>[:<port>],
40 /// e.g.: alien://alice.cern.ch
41 /// The uid is the username and pw the password that should be used for
42 /// the connection. Depending on the <grid> the shared library (plugin)
43 /// for the selected system will be loaded. When the connection could not
44 /// be opened 0 is returned. For AliEn the supported options are:
45 /// -domain=<domain name>
46 /// -debug=<debug level from 1 to 10>
47 /// Example: "-domain=cern.ch -debug=5"
48 
49 TGrid *TGrid::Connect(const char *grid, const char *uid, const char *pw,
50  const char *options)
51 {
53  TGrid *g = 0;
54 
55  if (!grid) {
56  ::Error("TGrid::Connect", "no grid specified");
57  return 0;
58  }
59  if (!uid)
60  uid = "";
61  if (!pw)
62  pw = "";
63  if (!options)
64  options = "";
65 
66  if ((h = gROOT->GetPluginManager()->FindHandler("TGrid", grid))) {
67  if (h->LoadPlugin() == -1)
68  return 0;
69  g = (TGrid *) h->ExecPlugin(4, grid, uid, pw, options);
70  }
71 
72  return g;
73 }
gGrid
TGrid * gGrid
Definition: TGrid.cxx:33
ClassImp
#define ClassImp(name)
Definition: Rtypes.h:364
TObject::Error
virtual void Error(const char *method, const char *msgfmt,...) const
Issue error message.
Definition: TObject.cxx:890
TROOT.h
TGrid
Definition: TGrid.h:44
TPluginHandler
Definition: TPluginManager.h:101
TGrid.h
TGrid::Connect
static TGrid * Connect(const char *grid, const char *uid=0, const char *pw=0, const char *options=0)
The grid should be of the form: <grid>://<host>[:<port>], e.g.
Definition: TGrid.cxx:49
h
#define h(i)
Definition: RSha256.hxx:106
TPluginManager.h
gROOT
#define gROOT
Definition: TROOT.h:406
TError.h
g
#define g(i)
Definition: RSha256.hxx:105