WO1999044119A2 - A method and apparatus for transporting behavior in an event-based distributed system - Google Patents
A method and apparatus for transporting behavior in an event-based distributed system Download PDFInfo
- Publication number
- WO1999044119A2 WO1999044119A2 PCT/US1999/003521 US9903521W WO9944119A2 WO 1999044119 A2 WO1999044119 A2 WO 1999044119A2 US 9903521 W US9903521 W US 9903521W WO 9944119 A2 WO9944119 A2 WO 9944119A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- event
- virtual machine
- computer system
- interest
- distributed
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/54—Interprogram communication
- G06F9/542—Event management; Broadcasting; Multicasting; Notifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/0223—User address space allocation, e.g. contiguous or non contiguous base addressing
- G06F12/023—Free address space management
- G06F12/0253—Garbage collection, i.e. reclamation of unreferenced memory
- G06F12/0261—Garbage collection, i.e. reclamation of unreferenced memory using reference counting
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/28—Databases characterised by their database models, e.g. relational or object models
- G06F16/289—Object oriented databases
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45504—Abstract machines for programme code execution, e.g. Java virtual machine [JVM], interpreters, emulators
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/465—Distributed object oriented systems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/54—Interprogram communication
- G06F9/547—Remote procedure calls [RPC]; Web services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/407—Bus networks with decentralised control
- H04L12/417—Bus networks with decentralised control with deterministic access, e.g. token passing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
- H04L12/427—Loop networks with decentralised control
- H04L12/433—Loop networks with decentralised control with asynchronous transmission, e.g. token ring, register insertion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/55—Push-based network services
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2209/00—Indexing scheme relating to G06F9/00
- G06F2209/54—Indexing scheme relating to G06F9/54
- G06F2209/544—Remote
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/133—Protocols for remote procedure calls [RPC]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/24—Negotiation of communication capabilities
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S707/00—Data processing: database and file management or data structures
- Y10S707/99951—File or database maintenance
- Y10S707/99952—Coherency, e.g. same view to multiple users
- Y10S707/99954—Version management
Definitions
- This invention relates generally to a distributed computer system and
- Distributed computer systems are systems in which the programming and data that the computer operates on are spread out over more than one computer
- the distributed system (the client) asks for some service from another part of the
- the server responds and then handles the client's request appropriately.
- the procedure may be implemented using some form of a
- RPC Remote Procedure Call
- the server executes the procedure
- the notifier notifies the listener or notifies another process (i.e., a third party process) designated by the listener when registering
- That notified entity i.e., the listener or the third party listener, as the case may be
- control is determined by notifications sent in response to the occurrence of designated events.
- the event may be generated in a
- second address space or physical machine e.g., the address space of the notifier
- the notification may be sent to
- a third address space or physical machine e.g., the address space of the third
- the listener to ensure that the correct function is executed by the
- a distributed computer system comprising the steps of: (1) registering interest in
- interest including information identifying the occurrence of the event, an
- the notification including a
- the protocol comprises a number of
- steps including: (1) receiving a registration of interest in an event that is
- the registration including an
- object including computer instructions for performing a process and parameter
- the notification including a
- a third aspect of the present invention is a computer system comprising
- second virtual machine executes a process that receives, from the first virtual machine, a registration of interest in an event and transmits a message in response to the occurrence of the event, the registration of interest and the
- the third virtual machine receives the message and
- Fig. 1 is a diagram of an exemplary distributed system
- Fig. 2 is a diagram of an exemplary computer within the exemplary
- Fig. 3 A is a flow chart illustrating methods consistent with the present
- Fig. 3B is a table showing exemplary event notification requests stored in
- Fig. 4 is a block diagram illustrating a distributed computing system
- This disclosure describes a protocol allowing a listener process to register
- the methods may be executed as specified by the listener.
- the exemplary distributed system with various components
- exemplary distributed system utilizes the JavaTM programming environment to allow both code and data to be moved from device to device in a seamless
- the exemplary distributed system is layered on top of the
- the exemplary distributed system provides the simplicity of access
- the exemplary distributed system may contain thousands of devices
- a “service” refers to a resource, data, or functionality that can
- Examples of services provided as part of a Djinn include devices, such as printers, displays, and disks; software, such as applications or
- Both users and devices may join a Djinn.
- the user When joining a Djinn, the user
- a service has an interface defining the
- Fig. 1 depicts the exemplary distributed system 100 containing a
- the device 106 may be any of a number of devices, such as a printer, fax
- the network 108 may be a
- computers and one device are depicted as comprising the exemplary distributed
- system 100 may include additional computers or devices.
- Fig. 2 depicts the computer 102 in greater detail to show a number of the
- Computer 102 includes a memory 202, a secondary storage device 204, a central processing unit (CPU) 102, and a central processing unit (CPU) 102, and a central processing unit (CPU) 102, and a central processing unit (CPU) 102, and a central processing unit (CPU) 102, and a central processing unit (CPU) 102, and
- CPU central processing unit
- memory 202 includes a lookup service 212, a discovery server 214, and a JavaTM
- the Java runtime system 216 includes the JavaTM remote
- RMI method invocation system
- secondary storage device 204 includes a JavaSpaceTM 222.
- the exemplary distributed system 100 is based on
- the Java runtime system 216 includes the JavaTM API, allowing
- runtime system 216 is ported, the programs running on top of a Java runtime
- the Java runtime system 216 is
- the Java virtual machine 220 also facilitates platform independence.
- Java virtual machine 220 acts like an abstract computing machine, receiving instructions from programs in the form of byte codes and interpreting these byte
- RMI 218 facilitates remote method invocation by
- the lookup service 212 defines the services that are available for a
- Djinn there may be more than one Djinn and, consequently,
- lookup service 212 contains one object for each service within the Djinn, and
- each object contains various methods that facilitate access to the corresponding object
- the lookup service 212 and its access are described in greater detail in
- the discovery server 214 detects when a new device is added to the
- exemplary distributed system 100 during a process known as boot and join or
- the discovery server passes a
- the new device After registration, the new device becomes a member of the Djinn, and as a result, it may access all the services contained in the lookup service 212.
- the JavaSpace 222 is an object repository used by programs within the JavaSpace 222 .
- JavaSpaces are described in
- system 100 may contain many lookup services, discovery servers, and
- secondary storage devices like hard disks, floppy disks, or CD-
- Fig. 3A is a flow chart illustrating methods consistent with the present
- the registering object sends a message to a notifier process, which is preferably an
- the notifier will be present in the virtual machine in which the
- the registration message includes: (1) implicit or
- the notifier may use a table to store information relating to
- notifier monitors its system or the network for the occurrence of the event (step
- the notifier notifies the object identified by the registering object that the registered event has occurred (step 304).
- the notification includes an identification
- An event may be, for example, a timer event, a mouse
- Fig. 4 is a block diagram illustrating a distributed computing system
- Computer systems 412-414 are physically similar to
- 413, and 414 includes a computer platform or machine 409, 410, and 411,
- computer systems 412, 413, and 414 form a
- process 403 such as the message:
- ReferenceToVM408 is a reference to the entity that is to be notified in response
- notifier process 403 notifies the DiskFull event
- SendPage object or a reference to the "SendPage" object, and an indication
- virtual machine 408 may
- process 404 creates a process such as process 404 that executes the methods designated in the
- the SendPage object will then cause computer system 411 to
- the notify method is preferably a generic method
- each virtual machine and/or computer platform may include its own unique implementation of the notify method, although each implementation must
- SendPage object includes, within itself, all required methods
- SendPage is considered to be an object having "closure.”
- the object may have closure merely by
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000533803A JP2002505461A (en) | 1998-02-26 | 1999-02-18 | Transport processing method and apparatus in event-based distributed system |
EP99907135A EP1057100A2 (en) | 1998-02-26 | 1999-02-18 | A method and apparatus for transporting behavior in an event-based distributed system |
AU26867/99A AU2686799A (en) | 1998-02-26 | 1999-02-18 | A method and apparatus for transporting behavior in an event-based distributed system |
KR1020007009228A KR20010041176A (en) | 1998-02-26 | 1999-02-18 | A method and apparatus transporting behavior in an event-based distributed system |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7604898P | 1998-02-26 | 1998-02-26 | |
US60/076,048 | 1998-02-26 | ||
US09/044,933 US6463446B1 (en) | 1998-02-26 | 1998-03-20 | Method and apparatus for transporting behavior in an event-based distributed system |
US09/044,933 | 1998-03-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999044119A2 true WO1999044119A2 (en) | 1999-09-02 |
WO1999044119A3 WO1999044119A3 (en) | 1999-10-28 |
Family
ID=26722176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/003521 WO1999044119A2 (en) | 1998-02-26 | 1999-02-18 | A method and apparatus for transporting behavior in an event-based distributed system |
Country Status (7)
Country | Link |
---|---|
US (2) | US6463446B1 (en) |
EP (1) | EP1057100A2 (en) |
JP (1) | JP2002505461A (en) |
KR (1) | KR20010041176A (en) |
CN (1) | CN1292117A (en) |
AU (1) | AU2686799A (en) |
WO (1) | WO1999044119A2 (en) |
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WO1999044119A3 (en) | 1999-10-28 |
US6463446B1 (en) | 2002-10-08 |
AU2686799A (en) | 1999-09-15 |
KR20010041176A (en) | 2001-05-15 |
CN1292117A (en) | 2001-04-18 |
US20020059472A1 (en) | 2002-05-16 |
EP1057100A2 (en) | 2000-12-06 |
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