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1、BRITISH STANDARD BS ISO/IEC 9804:1998 Information technology Open Systems Interconnection Service definition for the Commitment, Concurrency and Recovery service element ICS 35.100.70 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IE
2、C 9804:1998 This British Standard, having been prepared under the direction of the DISC Board, was published under the authority of the Standards Committee and comes into effect on 15 March 1999 BSI 05-1999 ISBN 0 580 32144 4 National foreword This British Standard reproduces verbatim ISO/IEC 9804:1
3、998 and implements it as the UK national standard. It supersedes BS ISO/IEC 9804:1994 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee IST/6, Data communications, which has the responsibility to: aid enquirers to understand the text; present to the res
4、ponsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on
5、request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility
6、of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations
7、. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO/IEC title page, pages ii to vi, pages 1 to 54 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendme
8、nt table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 9804:1998 BSI 05-1999i Contents Page National forewordInside front cover Forewordv Text o
9、f ISO/IEC 98041 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:
10、13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 9804:1998 ii BSI 05-1999 Contents Page Forewordv Introduction1 1Scope1 2Normative references2 2.1Identical Recommendations|International Standards2 2.2Paired Recommendations|International Standards equivalent in technical content2 3Definitions
11、2 3.1Reference Model definitions2 3.2Service conventions definitions3 3.3Presentation service definitions3 3.4ACSE service definitions3 3.5Application Layer Structure definitions3 3.6CCR service definitions3 4Abbreviations7 5Conventions8 6Concepts8 6.1Use of CCR in a distributed application environm
12、ent8 6.2CCR facilities14 6.3Heuristic decisions15 7Service definition16 7.1C-INITIALIZE service16 7.2C-BEGIN service17 7.3C-PREPARE service18 7.4C-READY service19 7.5C-COMMIT service19 7.6C-ROLLBACK service19 7.7C-NOCHANGE service20 7.8C-CANCEL service21 7.9C-RECOVER service21 7.10 C-P-ERROR service
13、22 8Sequencing information23 8.1General23 8.2Events29 8.3States29 8.4Predicates29 8.5Interpretation of the state table29 8.6Completing the branch29 8.7Collisions and disruptive services29 9Using CCR30 9.1General30 9.2Use of CCR with non-reference mapping30 9.3Use of session synchronization and resyn
14、chronization services30 9.4Use of CCR with session activities30 9.5Use of presentation services30 Annex A CCR service-user rules31 A.1Introduction31 A.2Compliance31 A.3CCR service primitive usage rules31 A.4Atomic action data manipulation rules34 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 2
15、3 01:34:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 9804:1998 BSI 05-1999iii Page A.5Bound data manipulation rules35 A.6CCR service-user data transfer rules35 Annex B Relationship of CCR to the Application Layer Structure35 B.1CCR service-provider35 B.2CCR service-user35 B.3Atomic actio
16、n graph37 Annex C CCR tutorial37 C.1Introduction37 C.2Structure of an atomic action tree38 C.3CCR service-user information resources41 C.4Concurrency42 C.5Recovery43 C.6Time relations and sequence of service primitives46 C.7Comments on implementation complexity47 C.8Using the User Data parameter on
17、CCR services47 C.9Optional use of C-PREPARE53 Figure 1 Atomic action graph8 Figure 2 Atomic action graph ordered according sequence of joining9 Figure 3 Commit-tree the same as the begin-tree11 Figure 4 Single commit coordinator different from the atomic action initiator11 Figure 5 Two commit coordi
18、nators following collision of ready signals12 Figure B.1 Atomic action tree architecture36 Figure C.1 Atomic action tree39 Figure C.240 Figure C.3 Time relations for two-branch atomic action tree49 Figure C.4 Sequence of primitives Atomic action is committed Explicit C-PREPARE50 Figure C.5 Sequence
19、of primitives Atomic action is rolled back51 Figure C.6 Sequence of primitives Atomic action is committed Implicit prepare C-BEGIN is not confirmed52 Figure C.7 Collision between application data and C-READY54 Table 1 CCR services16 Table 2 C-INITIALIZE parameters17 Table 3 C-BEGIN parameters18 Tabl
20、e 4 C-PREPARE parameter18 Table 5 C-READY parameter19 Table 6 C-COMMIT parameter19 Table 7 C-ROLLBACK parameter20 Table 8 C-NOCHANGE parameters20 Table 9 C-CANCEL parameter21 Table 10 C-RECOVER parameter21 Table 11 Recover State parameter values22 Table 12 C-P-ERROR parameter22 Table 13 States of CC
21、R ASE24 Table 14 Events25 Table 15 Predicates25 Table 16 State table Initialization, idle and error26 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 9804:1998 iv BSI 05-1999 Page Table 17 State table Phase I26 Table 18 State tabl
22、e After sending a ready signal27 Table 19 State table After receiving a ready signal27 Table 20 State table After cancel or rollback27 Table 21 State table After commit order28 Table 22 State table No-change completion28 Table 23 State table recovery28 Table C.1 Example of atomic action data43 Licen
23、sed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 9804:1998 BSI 05-1999v Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide
24、standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fiel
25、ds of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted
26、 by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. International Standard ISO/IEC 9804 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information
27、technology, Subcommittee SC 33, Distributed application services, in collaboration with ITU-T. The identical text is published as ITU-T Recommendation X.851. This third edition cancels and replaces the second edition (ISO/IEC 9804:1994), which has been technically revised. Annex A and Annex B form a
28、n integral part of this International Standard. Annex C is for information only. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI vi blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:13 GMT+00:00 2006, Uncontrolled Copy, (c)
29、BSI BS ISO/IEC 9804:1998 BSI 05-19991 Introduction This Recommendation|International Standard is one of a set of Recommendations|International Standards produced to facilitate the interconnection of information processing systems. It relates to other ITU-T Recommendations|International Standards in
30、the set defined by the Reference Model for Open Systems Interconnection (see ITU-T Rec. X.200|ISO/IEC 7498). The reference model subdivides the area of standardization for interconnection into a series of layers of specification, each of manageable size. The goal of Open Systems Interconnection is t
31、o allow, with a minimum of technical agreement outside the interconnection Recommendations and International Standards, the interconnection of information processing systems: from different manufacturers; under different managements; of different levels of complexity; and of different technologies.
32、This Recommendation|International Standard recognizes that application-processes may wish to communicate with each other for a wide variety of reasons. However, any communication requires certain services independent of the reasons for communication. The application-service-element defined in this R
33、ecommendation|International Standard provides such services. This Recommendation|International Standard defines the facilities of the application-service-element for Commitment, Concurrency and Recovery (CCR). CCR provides services for a single association. A referencing specification uses these ser
34、vices for starting and ending a specific sequence of distributed application operations despite application or communication failure. This Recommendation|International Standard is referenced by a specification to apply CCR to its operation. CCR services may be used with presentation services (see IT
35、U-T Rec. X.216|ISO/IEC 8822), or with other Application Layer services. However, the use of CCR services is subject to the restrictions specified in clause 9. The use of CCR services allows a referencing specification to define its activity as an atomic action. An atomic action may use many associat
36、ions, possibly with different protocols on each association. Annex A describes the rules that shall be followed by a specification that references this Recommendation|International Standard. Annex B presents the relationship of the CCR model and concepts to the Application Layer Structure (see ITU-T
37、 Rec. X.207|ISO/IEC 9545). Annex C is a tutorial to aid the understanding of the concepts and facilities of CCR. 1 Scope This Recommendation|International Standard is intended for reference by other specifications when the functionality of commitment, concurrency and recovery is required. It can be
38、referenced whenever the processing of two or more application-entity invocations in a distributed application needs to be organized into an atomic action. This Recommendation|International Standard defines services that are used on a single association to coordinate two application-entity invocation
39、s involved in an atomic action. The determination of which application-entity invocations are involved in an atomic action is not within the scope of this Recommendation|International Standard. This Recommendation|International Standard establishes the general principles for the coordinated use of t
40、he CCR services when more than two application-entity invocations are involved in a single atomic action, or when recovery is required after failure. The coordination of multiple associations and the related application-entity invocations that constitute an atomic action is achieved by a referencing
41、 specification in conjunction with this Recommendation|International Standard. This Recommendation|International Standard is only applicable to a distributed application whose specification references this Recommendation|International Standard. This Recommendation|International Standard does not spe
42、cify individual implementations or products. It does not constrain the implementation of entities and interfaces within a computer system. No requirement is made for conformance to this Recommendation|International Standard. This Recommendation|International Standard includes requirements for compli
43、ance that apply to a referencing specification. The CCR service defined in this Recommendation|International Standard requires that CCR Protocol Version 2 (or a later version) is being used. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
44、 ISO/IEC 9804:1998 2 BSI 05-1999 2 Normative references The following Recommendations and International Standards contain provisions which, through reference in this text, constitute provisions of this Recommendation|International Standard. At the time of publication, the editions indicated were val
45、id. All Recommendation and Standards are subject to revision, and parties to agreements based on this Recommendation|International Standard are encouraged to investigate the possibility of applying the most recent edition of the Recommendations and Standards indicated below. Members of IEC and ISO m
46、aintain registers of currently valid International Standards. The Telecommunication Standardization Bureau of the ITU maintains a list of the currently valid ITU-T Recommendations. 2.1 Identical Recommendations|International Standards ITU-T Recommendation X.200 (1994)| ISO/IEC 7498-1:1994, Informati
47、on technology Open Systems Interconnection Basic Reference Model: The Basic Model. ITU-T Recommendation X.207 (1993)| ISO/IEC 9545:1994, Information technology Open Systems Interconnection Application layer structure. ITU-T Recommendation X.210 (1993)| ISO/IEC 10731:1994, Information technology Open
48、 Systems Interconnection Basic Reference Model : Conventions for the definition of OSI services. ITU-T Recommendation X.215 (1995)| ISO/IEC 8326:1996, Information technology Open Systems Interconnection Session service definition. ITU-T Recommendation X.216 (1994)| ISO/IEC 8822:1994, Information tec
49、hnology Open Systems Interconnection Presentation service definition. ITU-T Recommendation X.217 (1995)| ISO/IEC 8649:1996, Information technology Open Systems Interconnection Service definition for the association control service element. ITU-T Recommendation X.227 (1995)| ISO/IEC 8650-1:1996, Information technology Open Systems Interconnection Connection-oriented protocol for the association control service element: Pr