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
|
// -*- C++ -*-
//=============================================================================
/**
* @file CSD_TP_Strategy.h
*
* $Id$
*
* @author Tim Bradley <bradley_t@ociweb.com>
*/
//=============================================================================
#ifndef TAO_CSD_TP_STRATEGY_H
#define TAO_CSD_TP_STRATEGY_H
#include /**/ "ace/pre.h"
#include "CSD_TP_Export.h"
#include "CSD_TP_Task.h"
#include "CSD_TP_Servant_State_Map.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "tao/CSD_Framework/CSD_Strategy_Base.h"
#include "tao/Intrusive_Ref_Count_Handle_T.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
namespace TAO
{
namespace CSD
{
class TP_Strategy;
typedef TAO_Intrusive_Ref_Count_Handle<TP_Strategy> TP_Strategy_Handle;
class TP_Custom_Request_Operation;
/**
* @class TP_Strategy
*
* @brief A simple custom Thread-Pool servant dispatching strategy class.
*
* This class represents a concrete implementation of a "Custom
* Servant Dispatching Strategy". This implementation is being called
* the "Thread Pool Strategy" reference implementation.
*
* A custom servant dispatching strategy object can be applied to a
* POA object in order to carry out the servant dispatching duties
* for that POA.
*
*/
class TAO_CSD_TP_Export TP_Strategy
: public Strategy_Base
{
public:
/// Constructor.
TP_Strategy(unsigned num_threads = 1);
/// Virtual Destructor.
virtual ~TP_Strategy();
/// Set the number of threads in the pool (must be > 0).
void set_num_threads(unsigned num_threads);
/// Return codes for the custom dispatch_request() methods.
enum CustomRequestOutcome
{
/// The request was successfully put on the request queue.
REQUEST_DISPATCHED,
/// The request has been executed/completed by a worker thread.
REQUEST_EXECUTED,
/// The request was removed from the queue and cancelled.
REQUEST_CANCELLED,
/// The request queue rejected the request
REQUEST_REJECTED
};
/// Inject a synchronous, custom request into the request queue.
/// This will block the calling thread until the request is handled
/// (dispatched or cancelled) or rejected.
/// Will return REQUEST_EXECUTED, REQUEST_CANCELLED, or REQUEST_REJECTED.
CustomRequestOutcome custom_synch_request
(TP_Custom_Request_Operation* op
ACE_ENV_ARG_DECL);
/// Inject an asynchronous, custom request into the request queue.
/// This will return control to the calling thread once the request
/// has been placed into the queue (or rejected).
/// Will return REQUEST_DISPATCHED or REQUEST_REJECTED.
CustomRequestOutcome custom_asynch_request
(TP_Custom_Request_Operation* op
ACE_ENV_ARG_DECL);
/// Cancel all requests that are targeted for the provided servant.
/// This is requested on the user application level.
void cancel_requests(PortableServer::Servant servant
ACE_ENV_ARG_DECL);
protected:
/// Handle the dispatching of a remote request.
///
/// This will cause a new "request" object to be created and pushed
/// on to a "request queue". The worker threads are responsible for
/// servicing the queue, and performing the actual dispatch logic.
virtual Strategy_Base::DispatchResult dispatch_remote_request_i
(TAO_ServerRequest& server_request,
const PortableServer::ObjectId& object_id,
PortableServer::POA_ptr poa,
const char* operation,
PortableServer::Servant servant
ACE_ENV_ARG_DECL);
/// Handle the dispatching of a collocated request.
///
/// This will cause a new "request" object to be created and pushed
/// on to a "request queue". The worker threads are responsible for
/// servicing the queue, and performing the actual dispatch logic.
virtual Strategy_Base::DispatchResult dispatch_collocated_request_i
(TAO_ServerRequest& server_request,
const PortableServer::ObjectId& object_id,
PortableServer::POA_ptr poa,
const char* operation,
PortableServer::Servant servant
ACE_ENV_ARG_DECL);
/// Event - The POA has been activated.
/// This will activate the worker thread(s).
/// Returns true if the worker threads were activated successfully.
/// Otherwise, returns false.
virtual bool poa_activated_event_i();
/// Event - The POA has been deactivated.
/// This will shutdown the worker thread(s).
virtual void poa_deactivated_event_i();
/// Event - A servant has been activated
virtual void servant_activated_event_i
(PortableServer::Servant servant,
const PortableServer::ObjectId& oid
ACE_ENV_ARG_DECL);
/// Event - A servant has been deactivated
virtual void servant_deactivated_event_i
(PortableServer::Servant servant,
const PortableServer::ObjectId& oid
ACE_ENV_ARG_DECL);
private:
/// This is the active object used by the worker threads.
/// The request queue is owned/managed by the task object.
/// The strategy object puts requests into the task's request
/// queue, and the worker threads service the queued requests
/// by performing the actual servant request dispatching logic.
TP_Task task_;
/// The number of worker threads to use for the task.
unsigned num_threads_;
/// The map of servant state objects.
TP_Servant_State_Map servant_state_map_;
};
}
}
TAO_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
# include "CSD_TP_Strategy.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* TAO_CSD_TP_STRATEGY_H */
|
