Mercurial > hg > orthanc-stone
annotate Framework/Loaders/LoaderStateMachine.h @ 973:38409549db43 toa2019082903
Log with addresses + added fingerprint mechanism to avoid calling zombie objects
where:
- a message is sent with a receiver
- the receiver dies
- another receiver with the SAME address is created
- the message reply is executed --> execution on the wrong object!
(since their "identity" is their address. The fix is to identify them with
an UUID stored at creation time)
| author | Benjamin Golinvaux <bgo@osimis.io> |
|---|---|
| date | Thu, 29 Aug 2019 18:07:55 +0200 |
| parents | df442f1ba0c6 |
| children | 262a0244e9b2 |
| rev | line source |
|---|---|
| 815 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
| 5 * Copyright (C) 2017-2019 Osimis S.A., Belgium | |
| 6 * | |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU Affero General Public License | |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #pragma once | |
| 23 | |
| 24 #include "../Messages/IObservable.h" | |
| 25 #include "../Messages/IObserver.h" | |
| 26 #include "../Oracle/GetOrthancImageCommand.h" | |
| 27 #include "../Oracle/GetOrthancWebViewerJpegCommand.h" | |
| 28 #include "../Oracle/IOracle.h" | |
| 29 #include "../Oracle/OracleCommandExceptionMessage.h" | |
| 30 #include "../Oracle/OrthancRestApiCommand.h" | |
| 31 | |
| 32 #include <Core/IDynamicObject.h> | |
| 33 | |
| 34 #include <list> | |
| 35 | |
| 36 namespace OrthancStone | |
| 37 { | |
| 38 /** | |
| 39 This class is supplied with Oracle commands and will schedule up to | |
| 40 simultaneousDownloads_ of them at the same time, then will schedule the | |
| 41 rest once slots become available. It is used, a.o., by the | |
| 42 OrtancMultiframeVolumeLoader class. | |
| 43 */ | |
| 44 class LoaderStateMachine : public IObserver | |
| 45 { | |
| 46 protected: | |
| 47 class State : public Orthanc::IDynamicObject | |
| 48 { | |
| 49 private: | |
| 50 LoaderStateMachine& that_; | |
| 51 | |
| 52 public: | |
| 53 State(LoaderStateMachine& that) : | |
| 54 that_(that) | |
| 55 { | |
| 56 } | |
| 57 | |
| 58 State(const State& currentState) : | |
| 59 that_(currentState.that_) | |
| 60 { | |
| 61 } | |
| 62 | |
| 63 void Schedule(OracleCommandWithPayload* command) const | |
| 64 { | |
| 65 that_.Schedule(command); | |
| 66 } | |
| 67 | |
| 68 template <typename T> | |
| 69 T& GetLoader() const | |
| 70 { | |
| 71 return dynamic_cast<T&>(that_); | |
| 72 } | |
| 73 | |
| 74 virtual void Handle(const OrthancRestApiCommand::SuccessMessage& message); | |
| 75 | |
| 76 virtual void Handle(const GetOrthancImageCommand::SuccessMessage& message); | |
| 77 | |
| 78 virtual void Handle(const GetOrthancWebViewerJpegCommand::SuccessMessage& message); | |
| 79 }; | |
| 80 | |
| 81 void Schedule(OracleCommandWithPayload* command); | |
| 82 | |
| 83 void Start(); | |
| 84 | |
| 85 private: | |
| 86 void Step(); | |
| 87 | |
| 88 void Clear(); | |
| 89 | |
| 90 void HandleExceptionMessage(const OracleCommandExceptionMessage& message); | |
| 91 | |
| 92 template <typename T> | |
| 93 void HandleSuccessMessage(const T& message); | |
| 94 | |
| 95 typedef std::list<IOracleCommand*> PendingCommands; | |
| 96 | |
| 97 IOracle& oracle_; | |
| 98 bool active_; | |
| 99 unsigned int simultaneousDownloads_; | |
| 100 PendingCommands pendingCommands_; | |
| 101 unsigned int activeCommands_; | |
| 102 | |
| 103 public: | |
| 104 LoaderStateMachine(IOracle& oracle, | |
| 105 IObservable& oracleObservable); | |
| 106 | |
|
973
38409549db43
Log with addresses + added fingerprint mechanism to avoid calling zombie objects
Benjamin Golinvaux <bgo@osimis.io>
parents:
815
diff
changeset
|
107 virtual ~LoaderStateMachine(); |
| 815 | 108 |
| 109 bool IsActive() const | |
| 110 { | |
| 111 return active_; | |
| 112 } | |
| 113 | |
| 114 void SetSimultaneousDownloads(unsigned int count); | |
| 115 }; | |
| 116 } |