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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
// This may look like C, but it's really -*- C++ -*-
// $Id$
#if !defined (TAO_CONNECT_H)
# define TAO_CONNECT_H
// ============================================================================
//
// = LIBRARY
// TAO
//
// = FILENAME
// Connect.h
//
// = AUTHOR
// Chris Cleeland
//
// ============================================================================
# include "ace/Reactor.h"
# include "ace/Acceptor.h"
# include "ace/SOCK_Acceptor.h"
# include "ace/Synch.h"
# include "ace/Svc_Handler.h"
// Forward Decls
class TAO_OA_Parameters;
class TAO_GIOP_RequestHeader;
typedef ACE_Svc_Handler<ACE_SOCK_STREAM, ACE_NULL_SYNCH>
TAO_SVC_HANDLER;
class TAO_Client_Connection_Handler : public TAO_SVC_HANDLER
{
// = TITLE
// <Svc_Handler> used on the client side and returned by the
// <TAO_CONNECTOR>.
public:
// = Intialization method.
TAO_Client_Connection_Handler (ACE_Thread_Manager * = 0);
// Do-nothing constructor.
// = <Connector> hook.
virtual int open (void *);
// Activation template method.
virtual int close (u_long flags = 0);
// Termination template method.
int send_request (CDR &stream, int is_twoway);
// Send the request in <stream>. If it is a twoway invocation, then
// this re-enters the reactor event loop so that incoming requests
// can continue to be serviced. This insures that a nested upcall,
// i.e., an invocation coming back from the remote during this
// invocation, will still be handled and deadlock averted.
// = Event Handler overloads
virtual int handle_input (ACE_HANDLE = ACE_INVALID_HANDLE);
// Called when a a response from a twoway invocation is available.
virtual int handle_close (ACE_HANDLE, ACE_Reactor_Mask);
// Perform appropriate closing of the connection.
private:
typedef TAO_SVC_HANDLER BASECLASS;
// Trait indicating the base class.
u_char expecting_response_;
// State flag which, if non-zero, indicates that this handler is
// looking to get input. Otherwise, any input received is
// unexpected.
u_char input_available_;
// Flag indicating whether or not input is available. Only valid
// when <expecting_response_> is non-zero.
};
class TAO_Server_Connection_Handler : public TAO_SVC_HANDLER
{
// = TITLE
// Handles requests on a single connection in a server.
public:
TAO_Server_Connection_Handler (ACE_Thread_Manager *t = ACE_Thread_Manager::instance ());
// Constructor.
virtual int open (void *);
// Called by the <Strategy_Acceptor> when the handler is completely
// connected. Argument is unused.
virtual int svc (void);
// Only used when the handler is turned into an active object by
// calling <activate>. This serves as the event loop in such cases.
TAO_OA_Parameters *params (void);
void params (TAO_OA_Parameters *p);
// = Template Methods Called by <handle_input>
enum RequestStatus
{
Error = -1,
Request, // A CORBA Request was received
LocateRequest // A CORBA LocateRequest was received
};
virtual RequestStatus recv_request (CDR &msg, CORBA::Environment &env);
// Extract a message from the stream associated with <peer()> and
// place it into <msg>. Return either <Request> or <LocateRequest>
// if success, <Error> with <errno> and <env> set if problems.
virtual int handle_message (CDR &msg, int &response_required,
CDR &response, CORBA::Environment &env);
// Handle processing of the request residing in <msg>, setting
// <response_required> to zero if the request is for a oneway or
// non-zero if for a two-way and <response> to any necessary
// response (including errors). In case of errors, -1 is returned
// and additional information carried in <env>.
protected:
virtual int handle_locate (CDR &msg, int &response_required,
CDR &response, CORBA::Environment &env);
// Handle processing of the location request residing in <msg>,
// setting <response_required> to one if no errors are encountered.
// The LocateRequestReply is placed into <response>. In case of
// errors, -1 is returned and additional information carried in
// <env>.
virtual void handle_request (const TAO_GIOP_RequestHeader &hdr,
CDR &request_body,
CDR &response,
TAO_Dispatch_Context *some_info,
CORBA::Environment &env);
// Once a request is found in a message, this finds the appropriate
// POA and dispatches it, then takes care to properly format any
// response.
virtual void send_response (CDR &response);
// Send <response> to the client on the other end.
// = Event Handler overloads
virtual int handle_input (ACE_HANDLE = ACE_INVALID_HANDLE);
// Reads a message from the <peer()>, dispatching and servicing it
// appropriately.
virtual int handle_close (ACE_HANDLE,
ACE_Reactor_Mask);
// Perform appropriate closing of the connection.
TAO_OA_Parameters *params_;
// Pointer to the object adapter parameters.
};
typedef ACE_Strategy_Acceptor<TAO_Server_Connection_Handler,
ACE_SOCK_ACCEPTOR>
TAO_ACCEPTOR;
#endif /* TAO_CONNECT_H */
|
