annotate OrthancStone/Sources/Loaders/ILoadersContext.h @ 1956:1e5ba130f041

move to Orthanc framework 1.11.2
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 27 Oct 2022 10:52:21 +0200
parents 7053b8a0aaec
children 07964689cb0b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1228
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
1 /**
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
2 * Stone of Orthanc
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
4 * Department, University Hospital of Liege, Belgium
1871
7053b8a0aaec upgrade to year 2022
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1870
diff changeset
5 * Copyright (C) 2017-2022 Osimis S.A., Belgium
7053b8a0aaec upgrade to year 2022
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1870
diff changeset
6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
1228
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
7 *
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
8 * This program is free software: you can redistribute it and/or
1598
8563ea5d8ae4 relicensing some files, cf. osimis bm26 and chu agreement on 2020-05-20
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1596
diff changeset
9 * modify it under the terms of the GNU Lesser General Public License
1228
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
10 * as published by the Free Software Foundation, either version 3 of
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
11 * the License, or (at your option) any later version.
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
12 *
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
13 * This program is distributed in the hope that it will be useful, but
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
1598
8563ea5d8ae4 relicensing some files, cf. osimis bm26 and chu agreement on 2020-05-20
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1596
diff changeset
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
8563ea5d8ae4 relicensing some files, cf. osimis bm26 and chu agreement on 2020-05-20
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1596
diff changeset
16 * Lesser General Public License for more details.
1596
4fb8fdf03314 removed annoying whitespace
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
17 *
1598
8563ea5d8ae4 relicensing some files, cf. osimis bm26 and chu agreement on 2020-05-20
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1596
diff changeset
18 * You should have received a copy of the GNU Lesser General Public
8563ea5d8ae4 relicensing some files, cf. osimis bm26 and chu agreement on 2020-05-20
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1596
diff changeset
19 * License along with this program. If not, see
8563ea5d8ae4 relicensing some files, cf. osimis bm26 and chu agreement on 2020-05-20
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1596
diff changeset
20 * <http://www.gnu.org/licenses/>.
1228
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
21 **/
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
22
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
23
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
24 #pragma once
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
25
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
26 #include "../Messages/IObserver.h"
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
27 #include "../Messages/IObservable.h"
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
28 #include "../Oracle/IOracleCommand.h"
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
29
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
30 #include <boost/shared_ptr.hpp>
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
31
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
32 namespace OrthancStone
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
33 {
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
34 class ILoadersContext : public boost::noncopyable
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
35 {
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
36 public:
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
37 class ILock : public boost::noncopyable
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
38 {
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
39 public:
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
40 virtual ~ILock()
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
41 {
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
42 }
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
43
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
44 /**
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
45 * This method is useful for loaders that must be able to
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
46 * re-lock the Stone loaders context in the future (for instance
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
47 * to schedule new commands once some command is processed).
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
48 **/
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
49 virtual ILoadersContext& GetContext() const = 0;
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
50
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
51 /**
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
52 * Get a reference to the observable against which a loader must
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
53 * listen to be informed of messages issued by the oracle once
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
54 * some command is processed.
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
55 **/
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
56 virtual IObservable& GetOracleObservable() const = 0;
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
57
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
58 /**
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
59 * Schedule a new command for further processing by the
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
60 * oracle. The "receiver" argument indicates to which object the
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
61 * notification messages are sent by the oracle upon completion
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
62 * of the command. The command is possibly not directly sent to
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
63 * the oracle: Instead, an internal "OracleScheduler" object is
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
64 * often used as a priority queue to rule the order in which
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
65 * commands are actually sent to the oracle. Hence the
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
66 * "priority" argument (commands with lower value are executed
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
67 * first).
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
68 **/
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
69 virtual void Schedule(boost::shared_ptr<IObserver> receiver,
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
70 int priority,
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
71 IOracleCommand* command /* Takes ownership */) = 0;
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
72
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
73 /**
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
74 * Cancel all the commands that are waiting in the
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
75 * "OracleScheduler" queue and that are linked to the given
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
76 * receiver (i.e. the observer that was specified at the time
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
77 * method "Schedule()" was called). This is useful for real-time
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
78 * processing, as it allows to replace commands that were
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
79 * scheduled in the past by more urgent commands.
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
80 *
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
81 * Note that this call does not affect commands that would have
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
82 * already be sent to the oracle. As a consequence, the receiver
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
83 * might still receive messages that were sent to the oracle
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
84 * before the cancellation (be prepared to handle such
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
85 * messages).
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
86 **/
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
87 virtual void CancelRequests(boost::shared_ptr<IObserver> receiver) = 0;
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
88
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
89 /**
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
90 * Same as "CancelRequests()", but targets all the receivers.
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
91 **/
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
92 virtual void CancelAllRequests() = 0;
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
93
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
94 /**
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
95 * Add a reference to the given observer in the Stone loaders
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
96 * context. This can be used to match the lifetime of a loader
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
97 * with the lifetime of the Stone context: This is useful if
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
98 * your Stone application does not keep a reference to the
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
99 * loader by itself (typically in global promises), which would
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
100 * make the loader disappear as soon as the scope of the
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
101 * variable is left.
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
102 **/
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
103 virtual void AddLoader(boost::shared_ptr<IObserver> loader) = 0;
1247
af35ec39ebec refactoring ILoadersContext
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1242
diff changeset
104
af35ec39ebec refactoring ILoadersContext
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1242
diff changeset
105 /**
af35ec39ebec refactoring ILoadersContext
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1242
diff changeset
106 * Returns the number of commands that were scheduled and
af35ec39ebec refactoring ILoadersContext
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1242
diff changeset
107 * processed using the "Schedule()" method. By "processed"
af35ec39ebec refactoring ILoadersContext
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1242
diff changeset
108 * commands, we refer to the number of commands that were either
af35ec39ebec refactoring ILoadersContext
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1242
diff changeset
109 * executed by the oracle, or canceled by the user. So the
af35ec39ebec refactoring ILoadersContext
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1242
diff changeset
110 * counting sequences are monotonically increasing over time.
af35ec39ebec refactoring ILoadersContext
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1242
diff changeset
111 **/
af35ec39ebec refactoring ILoadersContext
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1242
diff changeset
112 virtual void GetStatistics(uint64_t& scheduledCommands,
af35ec39ebec refactoring ILoadersContext
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1242
diff changeset
113 uint64_t& processedCommands) = 0;
1228
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
114 };
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
115
1242
b9b5d4378874 working of WebAssemblyOracle
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1228
diff changeset
116 virtual ~ILoadersContext()
b9b5d4378874 working of WebAssemblyOracle
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1228
diff changeset
117 {
b9b5d4378874 working of WebAssemblyOracle
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1228
diff changeset
118 }
b9b5d4378874 working of WebAssemblyOracle
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1228
diff changeset
119
1228
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
120 /**
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
121 * Locks the Stone loaders context, to give access to its
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
122 * underlying features. This is important for Stone applications
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
123 * running in a multi-threaded environment, for which a global
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
124 * mutex is locked.
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
125 **/
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
126 virtual ILock* Lock() = 0;
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
127 };
c471a0aa137b adding the next generation of loaders
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
128 }