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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
// This may look like C, but it's really -*- C++ -*-
// $Id$
// ============================================================================
//
// = LIBRARY
// TAO
//
// = FILENAME
// IIOP_Transport.h
//
// = DESCRIPTION
// IIOP Transport specific processing
//
// = AUTHOR
// Fred Kuhns <fredk@cs.wustl.edu>
//
// ============================================================================
#ifndef TAO_IIOP_TRANSPORT_H
#define TAO_IIOP_TRANSPORT_H
#include "tao/Pluggable.h"
#include "tao/GIOP.h"
// Forward decls.
class TAO_IIOP_Handler_Base;
class TAO_IIOP_Client_Connection_Handler;
class TAO_IIOP_Server_Connection_Handler;
class TAO_ORB_Core;
class TAO_Export TAO_IIOP_Transport : public TAO_Transport
{
// = TITLE
// This class acts as a bridge class to the transport specific
// connection handler (handler_).
//
// = DESCRIPTION
// Specialization of the base TAO_Transport class to handle the IIOP
// protocol. This class in turn will be further specialized for
// the client and server side.
public:
TAO_IIOP_Transport (TAO_IIOP_Handler_Base *handler,
TAO_ORB_Core *orb_core);
// Base object's creator method.
~TAO_IIOP_Transport (void);
// Default destructor.
CORBA::ULong tag (void);
// Returns the specific IOP instance, in this case IIOP.
void close_connection (void);
// Call the corresponding connection handlers close method.
int idle (void);
// Idles the corresponding connection handler.
TAO_IIOP_Handler_Base *&handler (void);
// Return a reference to the corresponding connection handler.
ACE_HANDLE handle (void);
// Return the underlying connection handle.
ssize_t send (const ACE_Message_Block *mblk,
ACE_Time_Value *s = 0);
// Write the contents of the Message_Block to the connection.
ssize_t send (const u_char *buf,
size_t len,
ACE_Time_Value *s = 0);
// Write the contents of the buffer of length len to the connection.
ssize_t send (const iovec *iov,
int iovcnt,
ACE_Time_Value *s = 0);
// Write the contents of iovcnt iovec's to the connection.
ssize_t recv (char *buf,
size_t len,
ACE_Time_Value *s = 0);
// Read len bytes from into buf.
ssize_t recv (char *buf,
size_t len,
int flags,
ACE_Time_Value *s = 0);
// Read len bytes from into buf using flags.
ssize_t recv (iovec *iov,
int iovcnt,
ACE_Time_Value *s = 0);
// Read received data into the iovec buffers.
virtual int send_request (TAO_ORB_Core *orb_core ,
TAO_OutputCDR &stream,
int twoway,
ACE_Time_Value *max_wait_time);
// Default action to be taken for send request.
protected:
TAO_IIOP_Handler_Base *handler_;
// the connection service handler used for accessing lower layer
// communication protocols.
};
class TAO_Export TAO_IIOP_Client_Transport : public TAO_IIOP_Transport
{
// = TITLE
// The Transport class used for Client side communication with a
// server.
//
// = DESCRIPTION
// Specialization of the TAO_IIOP_Transport class for client
// side. Methods related to sending one and two way requests
// lives here.
public:
TAO_IIOP_Client_Transport (TAO_IIOP_Client_Connection_Handler *handler,
TAO_ORB_Core *orb_core);
// Constructor. Note, TAO_IIOP_Handler_Base is the base class for
// both TAO_IIOP_Client_Connection_Handler and
// TAO_IIOP_Server_Connection_Handler.
~TAO_IIOP_Client_Transport (void);
// destructor
TAO_IIOP_Client_Connection_Handler *client_handler (void);
// return a pointer to the client's connection handler.
virtual void start_request (TAO_ORB_Core *orb_core,
const TAO_Profile *profile,
const char* opname,
CORBA::ULong request_id,
CORBA::Boolean is_twoway,
TAO_OutputCDR &output,
CORBA::Environment &ACE_TRY_ENV = TAO_default_environment ())
ACE_THROW_SPEC ((CORBA::SystemException));
// Fill into <output> the right headers to make a request.
virtual void start_locate (TAO_ORB_Core *orb_core,
const TAO_Profile *profile,
CORBA::ULong request_id,
TAO_OutputCDR &output,
CORBA::Environment &ACE_TRY_ENV = TAO_default_environment ())
ACE_THROW_SPEC ((CORBA::SystemException));
// Fill into <output> the right headers to make a locate request.
int send_request (TAO_ORB_Core *orb_core,
TAO_OutputCDR &stream,
int twoway,
ACE_Time_Value *max_wait_time);
// This is a bridge method for the connection handlers
// <send_request> method. The connection handler is responsible for
// concurrency strategies, typically using the leader-follower
// pattern.
int handle_client_input (int block = 0,
ACE_Time_Value *max_time_value = 0);
// Read and handle the reply. Returns 0 when there is Short Read on
// the connection. Returns 1 when the full reply is read and
// handled. If <block> is 1, then reply is read in a blocking
// manner.
virtual int register_handler (void);
// Register the handler with the reactor. This will be called by the
// Wait Strategy if Reactor is used for that strategy.
protected:
int check_unexpected_data (void);
// This method checks for unexpected data.
private:
TAO_IIOP_Client_Connection_Handler *client_handler_;
// pointer to the corresponding client side connection handler.
};
// ****************************************************************
class TAO_Export TAO_IIOP_Server_Transport : public TAO_IIOP_Transport
{
// = TITLE
// The Transport class used for server communication with a
// connected client.
//
// = DESCRIPTION
// Specialization of the TAO_IIOP_Transport class for the server side.
// methods for reading messages (requests) and sending replies live
// here.
public:
TAO_IIOP_Server_Transport (TAO_IIOP_Server_Connection_Handler *handler,
TAO_ORB_Core *orb_core);
// Default creator method.
~TAO_IIOP_Server_Transport (void);
// Default destructor
TAO_IIOP_Server_Connection_Handler *server_handler_;
// Pointer to the corresponding connection handler.
TAO_GIOP_Message_State message_state_;
// This keep the state of the current message, to enable
// non-blocking reads, fragment reassembly, etc.
};
#endif /* TAO_IIOP_TRANSPORT_H */
|
