1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1998-2009. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
-module(tv_ets_rpc).
-export([all/2,
info/4,
new/4,
tab2list/3,
insert/4,
lookup/4,
delete/4
]).
all(_Node, true) ->
chk(catch ets:all());
all(Node, false) ->
chk(catch rpc:block_call(Node, ets, all, [])).
info(_Node, true, TabId, What) ->
chk(catch ets:info(TabId, What));
info(Node, false, TabId, What) ->
chk(catch rpc:block_call(Node, ets, info, [TabId, What])).
new(_Node, true, TabName, Options) ->
case catch ets:new(TabName, Options) of
{TabName, Pid} when is_pid(Pid) ->
{TabName,Pid};
{TabNo, Pid} when is_pid(Pid) ->
{TabNo,Pid};
OtherResult ->
chk(OtherResult)
end;
new(Node, false, TabName, Options) ->
case catch rpc:block_call(Node, ets, new, [TabName, Options]) of
{TabName, Pid} when is_pid(Pid) ->
{TabName,Pid};
{TabNo, Pid} when is_pid(Pid) ->
{TabNo, Pid};
OtherResult ->
chk(OtherResult)
end.
tab2list(_Node, true, TabId) ->
chk(catch ets:tab2list(TabId));
tab2list(Node, false, TabId) ->
chk(catch rpc:call(Node, ets, tab2list, [TabId])).
insert(_Node, true, TabId, Object) ->
chk(catch ets:insert(TabId, Object));
insert(Node, false, TabId, Object) ->
chk(catch rpc:call(Node, ets, insert, [TabId, Object])).
lookup(_Node, true, TabId, Key) ->
chk(catch ets:lookup(TabId, Key));
lookup(Node, false, TabId, Key) ->
chk(catch rpc:call(Node, ets, lookup, [TabId, Key])).
delete(_Node, true, TabId, Key) ->
chk(catch ets:delete(TabId, Key));
delete(Node, false, TabId, Key) ->
chk(catch rpc:call(Node, ets, delete, [TabId, Key])).
chk(Result) ->
case Result of
undefined ->
throw(no_table);
_Anything when is_list(Result) ->
Result;
_Anything when is_atom(Result) ->
Result;
_Anything when is_integer(Result) ->
Result;
_Anything when is_pid(Result) ->
Result;
%% Messages received when node is down.
{badrpc, nodedown} ->
throw(nodedown);
{'EXIT', nodedown} ->
throw(nodedown);
{'EXIT', {{badarg, {gen, set_monitor_node, _Args}}, _Reason}} ->
throw(nodedown);
%% Messages received when table doesn't exist.
{'EXIT', {badarg, {ets,local_info,_Args}}} ->
%% Due to inconsistencies in R2D and earlier versions:
%% ets:info/1 returned 'undefined' when table didn't
%% exist, while ets:info/2 returned the exit-signal
%% above. This was corrected in R3A - now both functions
%% return 'undefined' :-)
throw(no_table);
{badrpc, {'EXIT', {badarg,_Reason}}} ->
throw(no_table);
{'EXIT', {badarg,_Reason}} ->
throw(no_table);
Error when is_tuple(Error) ->
throw({unexpected_error,Error})
end.
|
