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ffbbf9ab GE |
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 | ||
2a956e65 GE |
28 | /// set logging for coming and current connections |
29 | void BasicSocketWrapper::set_logging(std::ostream *_logstream, log_level_values _log_level) | |
30 | { | |
31 | ConnectionWrapper::set_logging(_logstream,_log_level); | |
32 | ||
33 | if (connection_established()) | |
34 | get_connection()->set_logging(_logstream,_log_level); | |
35 | } | |
36 | ||
37 | ||
487afb79 | 38 | /// return active connection, create new tcp or unix connection if not existing |
ffbbf9ab GE |
39 | client_connection* BasicSocketWrapper::get_connection(void) |
40 | { | |
41 | if (c.get() == NULL) | |
42 | { | |
43 | if (socket_type == tcp_s) | |
44 | c=std::auto_ptr<socket_client_connection> | |
e1614a6d | 45 | (new socket_client_connection(port,server,connect_timeout_usec,max_retries,logstream,log_level)); |
ffbbf9ab GE |
46 | else if (socket_type == unix_s) |
47 | c=std::auto_ptr<socket_client_connection> | |
e1614a6d | 48 | (new socket_client_connection(path,connect_timeout_usec,max_retries,logstream,log_level)); |
ffbbf9ab GE |
49 | } |
50 | ||
51 | return c.get(); | |
52 | } | |
53 | ||
487afb79 GE |
54 | /// try to reconnect max_retries time if we encounter a t2n_communication_error |
55 | /// during execution of the command | |
fb3345ad | 56 | bool ReconnectSocketWrapper::handle(command_client* stubBase, boost::function< void() > f) |
ffbbf9ab GE |
57 | { |
58 | int tries=0; | |
59 | ||
60 | while(true) | |
61 | { | |
62 | try | |
63 | { | |
64 | // we always reconnect if something went wrong before: | |
65 | // makes sure the buffers are clean of half-sent packets etc. | |
66 | if (tries > 0) | |
67 | c->reconnect(); | |
68 | ||
69 | f(); | |
70 | // we were successful | |
fb3345ad | 71 | return true; |
ffbbf9ab GE |
72 | } |
73 | catch(t2n_connect_error &e) | |
74 | { | |
75 | // reconnect already tries max_tries times to reconnect: we are done if that failed | |
76 | throw(e); | |
77 | } | |
78 | catch(t2n_communication_error &e) | |
79 | { | |
80 | // aborts the loop with an exception after max_retries iterations | |
81 | // retries means that the first try doesn't count: use > | |
82 | if (tries > max_retries) | |
83 | throw(e); | |
84 | ||
85 | // otherwise ignore the exception and reconnect in the next iteration | |
86 | } | |
87 | catch(...) | |
88 | { | |
89 | throw; | |
90 | } | |
91 | ||
92 | tries++; | |
93 | } | |
fb3345ad GE |
94 | |
95 | return false; | |
ffbbf9ab GE |
96 | } |
97 | ||
487afb79 | 98 | /// return active connection, return a dummy-connection if we can't establish one |
ffbbf9ab GE |
99 | client_connection* ReconnectIgnoreFailureSocketWrapper::get_connection(void) |
100 | { | |
fb3345ad | 101 | client_connection* tmp=BasicSocketWrapper::get_connection(); |
ffbbf9ab | 102 | |
fb3345ad | 103 | if (tmp->is_closed()) |
ffbbf9ab | 104 | { |
fb3345ad GE |
105 | // throw away the closed connection... |
106 | c.reset(); | |
107 | // ...return the dummy one instead | |
108 | tmp=&dc; | |
ffbbf9ab GE |
109 | } |
110 | ||
111 | return tmp; | |
112 | } | |
113 | ||
e162ddf2 | 114 | /// try to execute the command, may ignore the command if server not available |
fb3345ad | 115 | bool ReconnectIgnoreFailureSocketWrapper::handle(command_client* stubBase, boost::function< void() > f) |
ffbbf9ab | 116 | { |
fb3345ad | 117 | if (!connection_established()) |
ffbbf9ab | 118 | { |
fb3345ad GE |
119 | // dummy connection is in place: try to establish a real one |
120 | client_connection* tmp=get_connection(); | |
121 | ||
122 | if (tmp != &dc) | |
123 | { | |
124 | // success! we've got a real connection | |
125 | stubBase->replace_connection(tmp); | |
126 | } | |
ffbbf9ab | 127 | } |
fb3345ad GE |
128 | |
129 | // only try to handle the call if we've got a real connection | |
130 | if (connection_established()) | |
ffbbf9ab | 131 | { |
fb3345ad GE |
132 | try |
133 | { | |
134 | ReconnectSocketWrapper::handle(stubBase,f); | |
135 | return true; | |
136 | } | |
137 | catch(t2n_communication_error &e) | |
138 | { | |
139 | // ignore | |
140 | } | |
141 | catch(...) | |
142 | { | |
143 | throw; | |
144 | } | |
ffbbf9ab | 145 | } |
fb3345ad GE |
146 | |
147 | return false; | |
ffbbf9ab GE |
148 | } |
149 | ||
150 | } |