Mesh Oriented datABase  (version 5.5.0)
An array-based unstructured mesh library
ErrorHandlingSimulation.cpp
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1 /** @example ErrorHandlingSimulation.cpp
2  * Description: This example simulates MOAB's enhanced error handling in parallel. \n
3  * All of the errors are contrived, used for simulation purpose only. \n
4  *
5  * Note: We do not need a moab instance for this example
6  *
7  * <b>To run</b>: mpiexec -np 4 ./ErrorHandlingSimulation <test_case_num(1 to 4)> \n
8  */
9 
10 #include "moab/MOABConfig.h"
11 #include "moab/ErrorHandler.hpp"
12 #ifdef MOAB_HAVE_MPI
13 #include "moab_mpi.h"
14 #endif
15 
16 #include <iostream>
17 #include <cstdlib>
18 
19 using namespace moab;
20 using namespace std;
21 
22 // Functions that create and handle contrived errors
23 // Call hierarchy: A calls B, and B calls C
24 ErrorCode FunctionC( int test_case_num, int rank )
25 {
26  switch( test_case_num )
27  {
28  case 1:
29  // Simulate a global fatal error MB_NOT_IMPLEMENTED on all processors
30  // Note, it is printed by root processor 0 only
31  MB_SET_GLB_ERR( MB_NOT_IMPLEMENTED, "A contrived global error MB_NOT_IMPLEMENTED" );
32  break;
33  case 2:
34  // Simulate a per-processor relevant error MB_INDEX_OUT_OF_RANGE on all processors
35  // Note, it is printed by all processors
36  MB_SET_ERR( MB_INDEX_OUT_OF_RANGE, "A contrived error MB_INDEX_OUT_OF_RANGE on processor " << rank );
37  break;
38  case 3:
39  // Simulate a per-processor relevant error MB_TYPE_OUT_OF_RANGE on all processors except
40  // root Note, it is printed by all non-root processors
41  if( 0 != rank )
42  MB_SET_ERR( MB_TYPE_OUT_OF_RANGE, "A contrived error MB_TYPE_OUT_OF_RANGE on processor " << rank );
43  break;
44  case 4:
45  // Simulate a per-processor relevant error MB_INDEX_OUT_OF_RANGE on processor 1
46  // Note, it is printed by processor 1 only
47  if( 1 == rank )
48  MB_SET_ERR( MB_INDEX_OUT_OF_RANGE, "A contrived error MB_INDEX_OUT_OF_RANGE on processor 1" );
49 
50  // Simulate a per-processor relevant error MB_TYPE_OUT_OF_RANGE on processor 3
51  // Note, it is printed by processor 3 only
52  if( 3 == rank ) MB_SET_ERR( MB_TYPE_OUT_OF_RANGE, "A contrived error MB_TYPE_OUT_OF_RANGE on processor 3" );
53  break;
54  default:
55  break;
56  }
57 
58  return MB_SUCCESS;
59 }
60 
61 ErrorCode FunctionB( int test_case_num, int rank )
62 {
63  ErrorCode err_code = FunctionC( test_case_num, rank );MB_CHK_ERR( err_code );
64 
65  return MB_SUCCESS;
66 }
67 
68 ErrorCode FunctionA( int test_case_num, int rank )
69 {
70  ErrorCode err_code = FunctionB( test_case_num, rank );MB_CHK_ERR( err_code );
71 
72  return MB_SUCCESS;
73 }
74 
75 int main( int argc, char** argv )
76 {
77  if( argc < 2 )
78  {
79  cout << "Usage: " << argv[0] << " <test_case_num(1 to 4)>" << endl;
80  return 0;
81  }
82 
83 #ifdef MOAB_HAVE_MPI
84  MPI_Init( &argc, &argv );
85 #endif
86 
87  // Initialize error handler, required for this example (not using a moab instance)
88  MBErrorHandler_Init();
89 
90  int test_case_num = atoi( argv[1] );
91  int rank = 0;
92 #ifdef MOAB_HAVE_MPI
93  MPI_Comm_rank( MPI_COMM_WORLD, &rank );
94 #endif
95 
96  ErrorCode rval = FunctionA( test_case_num, rank );MB_CHK_ERR( rval );
97 
98  // Finalize error handler, required for this example (not using a moab instance)
99  MBErrorHandler_Finalize();
100 
101 #ifdef MOAB_HAVE_MPI
102  MPI_Finalize();
103 #endif
104 
105  return 0;
106 }