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1 | /*************************************************************************** |
2 | * Copyright (C) 2008 by Gerd v. Egidy * | |
3 | * gve@intra2net.com * | |
4 | * * | |
5 | * This library is free software; you can redistribute it and/or modify * | |
6 | * it under the terms of the GNU Lesser General Public License version * | |
7 | * 2.1 as published by the Free Software Foundation. * | |
8 | * * | |
9 | * This library is distributed in the hope that it will be useful, * | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * | |
12 | * GNU Lesser General Public License for more details. * | |
13 | * * | |
14 | * You should have received a copy of the GNU Lesser General Public * | |
15 | * License along with this program; if not, write to the * | |
16 | * Free Software Foundation, Inc., * | |
17 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * | |
18 | ***************************************************************************/ | |
19 | ||
20 | #include <functional> | |
21 | #include <string> | |
22 | ||
23 | #include <socket_wrapper.hxx> | |
24 | ||
25 | namespace libt2n | |
26 | { | |
27 | ||
28 | client_connection* BasicSocketWrapper::get_connection(void) | |
29 | { | |
30 | if (c.get() == NULL) | |
31 | { | |
32 | if (socket_type == tcp_s) | |
33 | c=std::auto_ptr<socket_client_connection> | |
e1614a6d | 34 | (new socket_client_connection(port,server,connect_timeout_usec,max_retries,logstream,log_level)); |
ffbbf9ab GE |
35 | else if (socket_type == unix_s) |
36 | c=std::auto_ptr<socket_client_connection> | |
e1614a6d | 37 | (new socket_client_connection(path,connect_timeout_usec,max_retries,logstream,log_level)); |
ffbbf9ab GE |
38 | } |
39 | ||
40 | return c.get(); | |
41 | } | |
42 | ||
fb3345ad | 43 | bool ReconnectSocketWrapper::handle(command_client* stubBase, boost::function< void() > f) |
ffbbf9ab GE |
44 | { |
45 | int tries=0; | |
46 | ||
47 | while(true) | |
48 | { | |
49 | try | |
50 | { | |
51 | // we always reconnect if something went wrong before: | |
52 | // makes sure the buffers are clean of half-sent packets etc. | |
53 | if (tries > 0) | |
54 | c->reconnect(); | |
55 | ||
56 | f(); | |
57 | // we were successful | |
fb3345ad | 58 | return true; |
ffbbf9ab GE |
59 | } |
60 | catch(t2n_connect_error &e) | |
61 | { | |
62 | // reconnect already tries max_tries times to reconnect: we are done if that failed | |
63 | throw(e); | |
64 | } | |
65 | catch(t2n_communication_error &e) | |
66 | { | |
67 | // aborts the loop with an exception after max_retries iterations | |
68 | // retries means that the first try doesn't count: use > | |
69 | if (tries > max_retries) | |
70 | throw(e); | |
71 | ||
72 | // otherwise ignore the exception and reconnect in the next iteration | |
73 | } | |
74 | catch(...) | |
75 | { | |
76 | throw; | |
77 | } | |
78 | ||
79 | tries++; | |
80 | } | |
fb3345ad GE |
81 | |
82 | return false; | |
ffbbf9ab GE |
83 | } |
84 | ||
85 | client_connection* ReconnectIgnoreFailureSocketWrapper::get_connection(void) | |
86 | { | |
fb3345ad | 87 | client_connection* tmp=BasicSocketWrapper::get_connection(); |
ffbbf9ab | 88 | |
fb3345ad | 89 | if (tmp->is_closed()) |
ffbbf9ab | 90 | { |
fb3345ad GE |
91 | // throw away the closed connection... |
92 | c.reset(); | |
93 | // ...return the dummy one instead | |
94 | tmp=&dc; | |
ffbbf9ab GE |
95 | } |
96 | ||
97 | return tmp; | |
98 | } | |
99 | ||
fb3345ad | 100 | bool ReconnectIgnoreFailureSocketWrapper::handle(command_client* stubBase, boost::function< void() > f) |
ffbbf9ab | 101 | { |
fb3345ad | 102 | if (!connection_established()) |
ffbbf9ab | 103 | { |
fb3345ad GE |
104 | // dummy connection is in place: try to establish a real one |
105 | client_connection* tmp=get_connection(); | |
106 | ||
107 | if (tmp != &dc) | |
108 | { | |
109 | // success! we've got a real connection | |
110 | stubBase->replace_connection(tmp); | |
111 | } | |
ffbbf9ab | 112 | } |
fb3345ad GE |
113 | |
114 | // only try to handle the call if we've got a real connection | |
115 | if (connection_established()) | |
ffbbf9ab | 116 | { |
fb3345ad GE |
117 | try |
118 | { | |
119 | ReconnectSocketWrapper::handle(stubBase,f); | |
120 | return true; | |
121 | } | |
122 | catch(t2n_communication_error &e) | |
123 | { | |
124 | // ignore | |
125 | } | |
126 | catch(...) | |
127 | { | |
128 | throw; | |
129 | } | |
ffbbf9ab | 130 | } |
fb3345ad GE |
131 | |
132 | return false; | |
ffbbf9ab GE |
133 | } |
134 | ||
135 | } |