issue_40_invalidation.py

from pyrfc import Connection
from pprint import pprint


connection_info = {
    'ashost': '...',
    'client': '...',
    'lang': '...',
    'user': '...',
    'passwd': '...',
    'sysid': '...',
    'sysnr': '...',
}

function_name = u'ZHHDEMO_STRUCT_MOD'
table_name = u'ZHHTT_COL2'
struct_name = u'ZHHS_COL2'


def function_call():
    with Connection(**connection_info) as con:
        return con.call(function_name)


def get_cache():
    with Connection(**connection_info) as con:
        table_cached = con.type_desc_get(table_name)
        struct_cached = con.type_desc_get(struct_name)
        return {
            table_name: vars(table_cached),
            struct_name: vars(struct_cached),
        }


def invalidate():
    with Connection(**connection_info) as con:
        con.func_desc_remove(connection_info['sysid'], function_name)
        con.type_desc_remove(connection_info['sysid'], table_name)
        con.type_desc_remove(connection_info['sysid'], struct_name)


if __name__ == '__main__':
    c1 = get_cache()
    function_call()
    c2 = get_cache()
    invalidate()
    c3 = get_cache()
    pprint(c1)
    assert not c1 == c2 == c3, 'The cache has not changed'

output.py

{u'ZHHS_COL2': {'fields': [{'decimals': 0,
                            'field_type': u'RFCTYPE_CHAR',
                            'name': u'COL1',
                            'nuc_length': 255,
                            'nuc_offset': 0,
                            'type_description': None,
                            'uc_length': 510,
                            'uc_offset': 0},
                           {'decimals': 0,
                            'field_type': u'RFCTYPE_CHAR',
                            'name': u'COL2',
                            'nuc_length': 255,
                            'nuc_offset': 255,
                            'type_description': None,
                            'uc_length': 510,
                            'uc_offset': 510}],
                'name': u'ZHHS_COL2',
                'nuc_length': 510,
                'uc_length': 1020},
 u'ZHHTT_COL2': {'fields': [{'decimals': 0,
                             'field_type': u'RFCTYPE_CHAR',
                             'name': u'COL1',
                             'nuc_length': 255,
                             'nuc_offset': 0,
                             'type_description': None,
                             'uc_length': 510,
                             'uc_offset': 0},
                            {'decimals': 0,
                             'field_type': u'RFCTYPE_CHAR',
                             'name': u'COL2',
                             'nuc_length': 255,
                             'nuc_offset': 255,
                             'type_description': None,
                             'uc_length': 510,
                             'uc_offset': 510}],
                 'name': u'ZHHTT_COL2',
                 'nuc_length': 510,
                 'uc_length': 1020}}
Traceback (most recent call last):
  File "tests/issue_40_not_my.py", line 49, in <module>
    assert not c1 == c2 == c3, 'The cache has not changed'
AssertionError: The cache has not changed