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eSOA: A Contextual Analysis on Service Oriented Architecture for Embeddded Networks

Juan Antonio Martin Checa, profile picture
Juan Antonio Martin Checa

The document discusses service oriented architecture (SOA) and extending it for use in embedded networks (eSOA). It begins with introductions to key concepts like the Internet of Things (IoT), services, and web services standards. It then defines SOA and describes its fundamental design terms. The rest of the document outlines related work, future work, and conclusions on applying SOA principles for embedded systems and networks.

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eSOA: Service Oriented eSOA: Service Oriented Architecture for embedded Architecture for embedded networks networks (Software Systems Methodological Foundations) (Software Systems Methodological Foundations) Master in Software Engineering & Artificial Intelligence Master in Software Engineering & Artificial Intelligence Computer Science Department University of Malaga Juan Antonio Martin Checa 2011 2011
“Before God we are all equally wise - and equally foolish.” 2
“Before God we are all equally wise - and equally foolish.” -Albert Einstein 3
You might be wondering... You might be wondering... What is this about? eSOA: Service Oriented Architecture for Embedded Networks 4
Index of contents Index of contents 1. Introduction 1. Introduction 2. SOA (Service-Oriented Architecture) 2. SOA (Service-Oriented Architecture) 3. eSOA (SOA for Embedded Systems) 3. eSOA (SOA for Embedded Systems) 4. Related Work 4. Related Work 5. Future Work 5. Future Work 6. Conclusions 6. Conclusions eSOA: Service Oriented Architecture for Embedded Networks 5
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1. Introduction 1. Introduction 1.1 The Internet of Things (IoT) 1.1 The Internet of Things (IoT) 1.2 The Internet of Services (IoS) 1.2 The Internet of Services (IoS) 1.3 Services 1.3 Services 1.4 WSDL (Web Services Description Language) 1.4 WSDL (Web Services Description Language) 1.5 SOAP (Simple Object Access Protocol) 1.5 SOAP (Simple Object Access Protocol) eSOA: Service Oriented Architecture for Embedded Networks 6
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.1 The Internet of Things (IoT) 1.1 The Internet of Things (IoT) “self-configuring wireless network of sensors which purpose would be to interconnect all things” eSOA: Service Oriented Architecture for Embedded Networks 7
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.1 The Internet of Things (IoT) 1.1 The Internet of Things (IoT) every single object unique ID device (radio tag) IPv6 2128 addresses time no common / linear dimension management of massive parallel IT systems ambient intelligence own / shared goals eSOA: Service Oriented Architecture for Embedded Networks 8
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.2 The Internet of Services (IoS) 1.2 The Internet of Services (IoS) “next-generation of the services revolution” eSOA: Service Oriented Architecture for Embedded Networks 9
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.2 The Internet of Services (IoS) 1.2 The Internet of Services (IoS) “a new business model that can radically change the way we discover and invoke services“ eSOA: Service Oriented Architecture for Embedded Networks 10
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.2 The Internet of Services (IoS) 1.2 The Internet of Services (IoS) “worldwide, trusted service ecosystem of service providers, consumers, and brokers, buying, selling, repurposing, and composing services for different needs resulting in a new way of organizing the interaction between partner ecosystems and customer base” eSOA: Service Oriented Architecture for Embedded Networks 11
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.3 Services 1.3 Services Types of Service Business Service e-Service Web Service (WS) eSOA: Service Oriented Architecture for Embedded Networks 12
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.3 Services 1.3 Services Lifecycle of Services: Discovery, Invocation, & Execution eSOA: Service Oriented Architecture for Embedded Networks 13
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1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.3 Services 1.3 Services Atomic Vs Composite Services Atomic Service: provides a basic functionality Composite Service: +2 atomic/composite services (superior functionality) eSOA: Service Oriented Architecture for Embedded Networks 15
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.3 Services 1.3 Services WS 1st-Generation WS Platform WDSL (Web Services Description Language) XSD (XML Schema Definition Language) SOAP (Simple Object Access Protocol) UDDI (Universal Description Discovery & Integration) WS-I Basic Profile eSOA: Service Oriented Architecture for Embedded Networks 16
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.3 Services 1.3 Services WS eSOA: Service Oriented Architecture for Embedded Networks 17
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.3 Services 1.3 Services WS 2nd-Generation WS Platform WS-Security (and WS-SX) (WS- extensions) WS-Coordination WS-AtomicTransaction WS-BusinessActivity (and WS-TX) WS-ReliableMessaging (and WS-RX) WS-Policy WS-Addressing eSOA: Service Oriented Architecture for Embedded Networks 18
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.4 WSDL (Web Services Description Language) 1.4 WSDL (Web Services Description Language) XML-based language “model for describing WS ... as a collection of related endpoints (ports)” eSOA: Service Oriented Architecture for Embedded Networks 19
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.4 WSDL (Web Services Description Language) 1.4 WSDL (Web Services Description Language) eSOA: Service Oriented Architecture for Embedded Networks 20
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.5 SOAP (Simple Object Access Protocol) 1.5 SOAP (Simple Object Access Protocol) XML-based protocol “lightweight protocol intended for exchanging structured information in a decentralized, distributed environment” eSOA: Service Oriented Architecture for Embedded Networks 21
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.5 SOAP (Simple Object Access Protocol) 1.5 SOAP (Simple Object Access Protocol) eSOA: Service Oriented Architecture for Embedded Networks 22
You might be wondering... You might be wondering... OK, so... What is SOA? eSOA: Service Oriented Architecture for Embedded Networks 23
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2. SOA 2. SOA 2.1. Overview 2.1. Overview 2.2. Fundamental Design Terms 2.2. Fundamental Design Terms 2.3. Service-Oriented Computing 2.3. Service-Oriented Computing 2.4. Service-Oriented Architecture 2.4. Service-Oriented Architecture (SOA) (SOA) eSOA: Service Oriented Architecture for Embedded Networks 24
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2.1 Overview 2.1 Overview SOA “a paradigm for organizing and utilizing distributed capabilities that may be under the control of different ownership domains.[...] It provides a uniform means to offer, discover, interact with and use capabilities to produce desired effects consistent with measurable preconditions and expectations.” - OASIS (Organization for the Advancement of Structured Information Standard) eSOA: Service Oriented Architecture for Embedded Networks 25
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2.2 Fundamental Design Terms 2.2 Fundamental Design Terms eSOA: Service Oriented Architecture for Embedded Networks 26
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1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2.3 Service-Oriented Computing (SOC) 2.3 Service-Oriented Computing (SOC) SOC “a new generation distributed computing platform characterized by its distinct architectural model, design paradigm, and design principles, that includes design pattern catalogs, pattern languages, as well as related concepts, technologies, and frameworks.” eSOA: Service Oriented Architecture for Embedded Networks 28
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2.3 Service-Oriented Computing (SOC) 2.3 Service-Oriented Computing (SOC) SOC Goals & Benefits Increased Intrinsic Interoperability Increased Organizational Agility Increased Business-Technology Alignment Increased Federation Increased Vendor Diversification Increased ROI Reduced IT Burden eSOA: Service Oriented Architecture for Embedded Networks 29
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2.4 Service-Oriented Architecture (SOA) 2.4 Service-Oriented Architecture (SOA) SOA Elements eSOA: Service Oriented Architecture for Embedded Networks 30
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1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2.4 Service-Oriented Architecture (SOA) 2.4 Service-Oriented Architecture (SOA) SOA Principles 1. Standardized Service Contract 2. Service Loose Coupling 3. Service Abstraction 4. Service Reusability 5. Service Autonomy 6. Service Statelessness 7. Service Discoverability 8. Service Composability 9. Service Optimization 10. Service Relevance 11. Service Encapsulation eSOA: Service Oriented Architecture for Embedded Networks 33
You might be wondering... You might be wondering... A-ha! I know about SOA, but... what is e-SOA? eSOA: Service Oriented Architecture for Embedded Networks 34
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3. eSOA 3. eSOA 3.1. Overview 3.1. Overview 3.2. Embedded Networks Requirements 3.2. Embedded Networks Requirements 3.3. eSOA 3.3. eSOA 3.4. eSOA Middleware Design Principles 3.4. eSOA Middleware Design Principles 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 3.6. eSOA Middleware Example: Smart 3.6. eSOA Middleware Example: Smart Home Home eSOA: Service Oriented Architecture for Embedded Networks 35
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.1 Overview 3.1 Overview Past: isolated embedded systems Nowadays: connect & integrate daily-life devices into distributed embedded networks SOA: the most extended/widely adopted strategy for implementing complex, heterogeneous, and large IT systems worldwide (based on WS) Connecting WS-embedded devices: essential eSOA: Service Oriented Architecture for Embedded Networks 36
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.2. Embedded Networks Requirements 3.2. Embedded Networks Requirements 1. Heterogeneity 2. Distributed Architecture 3. Reconfigurable Architecture 4. Resource Limitations 5. Scalable Functionality 6. Error Detection and Recovery 7. End-User Programming 8. Bridging eSOA: Service Oriented Architecture for Embedded Networks 37
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.3. eSOA 3.3. eSOA KEY IDEAS: SOA is pretty good. If SOA is so good, why not taking advantage of it for embedded networks? eSOA: Service Oriented Architecture for Embedded Networks 38
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1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.3. eSOA 3.3. eSOA PROBLEM: SOA cannot be applied directly to embedded networks eSOA: Service Oriented Architecture for Embedded Networks 40
WS-world e-world eSOA 41
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WS-world e-world eSOA request-response messages data-driven messages WS instances not shared e-services states shared robust hw infrastructures hw constraints (CPU, mem) 43
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.4. eSOA Middleware Design Principles 3.4. eSOA Middleware Design Principles Embedded Networks Layers Architecture eSOA: Service Oriented Architecture for Embedded Networks 44
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1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation “the result of [the] code generation [...] is an optimized, tailored middleware with embedded and already configured services that implement the application logic. The main task of the middleware is to connect the different services involved independent[ly] of their location (local or remote).” - Sholz, A , Gapanova, I., Sommer, S., Buckl, C. eSOA: Service Oriented Architecture for Embedded Networks 46
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation Network Architecture eSOA: Service Oriented Architecture for Embedded Networks 47
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation Features 1. Efficient Distributed Data Processing 2. Metadata-Aided Service Composition 3. Run-Time Adaptability 4. Integration with External Services eSOA: Service Oriented Architecture for Embedded Networks 48
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 1. Efficient Distributed Data Processing Efficient Platform-Specific Code Generation Event-Based Data Processing Distributed Execution of Applications eSOA: Service Oriented Architecture for Embedded Networks 49
Node Architecture Efficient Platform-Specific Code Generation Event-Based Data Processing Distributed Execution of Applications 50
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 2. Metadata-Aided Service Composition End-user Programming average non-expert users: application (no implementation) - chose the most suitable application pattern (repository) - assign hw services to slots defined by the selected pattern - select logic services experienced users: - develop their own application patterns programmers: - develop logic services eSOA: Service Oriented Architecture for Embedded Networks 51
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 2. Metadata-Aided Service Composition (Semi-) Automatic Service Composition Case: subnets of identical / similar structure (re-)configuration of every single subnet: tedious Solution: application patterns automation - changes easily propagable between installations based on the same application pattern - application patterns easily inferred (by inspecting available services) suggestions for new installations eSOA: Service Oriented Architecture for Embedded Networks 52
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 3. Run-Time Adaptability Embedded networks: frequently dynamic - Nodes: new, reconfigured, unavailable, removed, mobile - Node failures: Local Vs Global recovery Local: redundant eServices / com. channels Global: switching targeted application - Node adaptation: to new applications eSOA: Service Oriented Architecture for Embedded Networks 53
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services Interaction Schemes IP-compatible Addressing Service Bridge eSOA: Service Oriented Architecture for Embedded Networks 54
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services eSOA: Service Oriented Architecture for Embedded Networks 55
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services Interaction Schemes 1. Continuous Interaction with the eNetwork 2. Ad-hoc Interaction with the eNetwork 3. Continuous Interaction with external WS 4. Ad-hoc Interaction with external WS eSOA: Service Oriented Architecture for Embedded Networks 56
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services Interaction Schemes Continuous Interaction with the eNetwork - Subscriptions low communication overhead support of non-periodic interactions managed by WS-Eventing, etc. eSOA: Service Oriented Architecture for Embedded Networks 57
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1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services Interaction Schemes Ad-hoc Interaction with the eNetwork - RPC-style WS invocations - - RPC (Remote Procedure Call) - - not planned beforehand Client RPC call (+data) Server process data response eSOA: Service Oriented Architecture for Embedded Networks 62
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1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services Interaction Schemes Continuous Interaction with external WS - Stream-based paradigm (embedded network) necessity of retrieving / sending data from/to an external WS on a periodic basis eSOA: Service Oriented Architecture for Embedded Networks 64
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1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services Interaction Schemes Ad-hoc Interaction with external WS not necessary not contemplated eServices have no knowledge about the specific wiring reconfigurations of applications are only triggered by WS end- users or the middleware itself, but never by eServices. eSOA: Service Oriented Architecture for Embedded Networks 66
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services IP-compatible Addressing all the devices in eSOA have an IP address Service Bridge: - monitors all incoming messages at Network Layer - translates messages into the suitable packet format - forwards messages to the targeted eService eSOA: Service Oriented Architecture for Embedded Networks 67
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services IP-compatible Addressing eSOA: Service Oriented Architecture for Embedded Networks 68
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.6. eSOA Middleware Example: Smart Home 3.6. eSOA Middleware Example: Smart Home eSOA: Service Oriented Architecture for Embedded Networks 69
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You might be wondering... You might be wondering... Oh! I think I got it! but... where does e-SOA fits? eSOA: Service Oriented Architecture for Embedded Networks 71
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 4. Related Work 4. Related Work AUTOSAR TinyDB KNX Cougar RUNES SIRENA M O R E S-O-C-R-A-D-E-S eSOA: Service Oriented Architecture for Embedded Networks 72
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 5. Future Work 5. Future Work --Improve application execution (data stream management tech) Improve application execution (data stream management tech) --Evaluate different service placement strategies Evaluate different service placement strategies --Automatic learning of service patterns (repository of apps) Automatic learning of service patterns (repository of apps) --Application level connectivity at the routing layer Application level connectivity at the routing layer routing optimization, low overhead (protocols //routing tables) routing optimization, low overhead (protocols routing tables) --Enrichment of the semantic descriptions of services Enrichment of the semantic descriptions of services select the most suitable service (service repository) select the most suitable service (service repository) --Interface for discovery //integration of field-level devices & WS Interface for discovery integration of field-level devices & WS UDDI registries //query interfaces (TinyDB) UDDI registries query interfaces (TinyDB) eSOA: Service Oriented Architecture for Embedded Networks 73
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions Internet of Things Internet of Things connect // integrate daily-life devices connect integrate daily-life devices into distributed embedded into distributed embedded networks networks connect WS & embedded devices connect WS & embedded devices eSOA: Service Oriented Architecture for Embedded Networks 74
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions Service-Oriented Architecture (SOA) Service-Oriented Architecture (SOA) most extended and widely most extended and widely adopted strategy for adopted strategy for implementing complex, implementing complex, heterogeneous, and large IT heterogeneous, and large IT systems systems eSOA: Service Oriented Architecture for Embedded Networks 75
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions Service-Oriented Architecture (SOA) Service-Oriented Architecture (SOA) Service: contract, loose coupling, Service: contract, loose coupling, abstraction, reusability, autonomy, abstraction, reusability, autonomy, statelessness, discoverability, statelessness, discoverability, composability, optimization, relevance composability, optimization, relevance & encapsulation & encapsulation Web Services (WS) Web Services (WS) eSOA: Service Oriented Architecture for Embedded Networks 76
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions Embedded Networks Embedded Networks heterogeneity, distributed // reconfigurable heterogeneity, distributed reconfigurable architecture, resource limitations, architecture, resource limitations, scalable functionality, error detection & scalable functionality, error detection & recovery, end-user programming, and recovery, end-user programming, and bridging bridging eServices eServices eSOA: Service Oriented Architecture for Embedded Networks 77
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions SOA Vs Embedded Networks SOA Vs Embedded Networks SOA not applicable directly to eNetworks SOA not applicable directly to eNetworks need for intermediary need for intermediary eSOA eSOA eSOA: Service Oriented Architecture for Embedded Networks 78
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions SOA architecture SOA architecture Application Layer Application Layer Service Layer Service Layer Abstract Infrastructure Layer Abstract Infrastructure Layer eSOA: Service Oriented Architecture for Embedded Networks 79
1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions SOA middleware SOA middleware Efficient Distributed Data Processing Efficient Distributed Data Processing Metadata-Aided Service Composition Metadata-Aided Service Composition Run-Time Adaptability Run-Time Adaptability Integration with External Services Integration with External Services eSOA: Service Oriented Architecture for Embedded Networks 80
You might be thinking... You might be thinking... Now you can Now you can impress your impress your friends talking friends talking about SOA ... about SOA ... please, ask! please, ask! eSOA: Service Oriented Architecture for Embedded Networks 81
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Thomas Erl 84
“By learning you will teach, by teaching you will learn.” “You see things; and you say, 'Why?' But I dream things that never were; and I say, ‘Why not?’” 85
“By learning you will teach, by teaching you will learn.” - Latin Proverb “You see things; and you say, 'Why?' But I dream things that never were; and I say, ‘Why not?’” - George Bernard Shaw 86
eSOA: Service Oriented eSOA: Service Oriented Architecture for embedded Architecture for embedded networks networks (Software Systems Methodological Foundations) (Software Systems Methodological Foundations) Master in Software Engineering & Artificial Intelligence Master in Software Engineering & Artificial Intelligence Computer Science Department University of Malaga Juan Antonio Martin Checa 2011 2011

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eSOA: A Contextual Analysis on Service Oriented Architecture for Embeddded Networks

  • 1. eSOA: Service Oriented eSOA: Service Oriented Architecture for embedded Architecture for embedded networks networks (Software Systems Methodological Foundations) (Software Systems Methodological Foundations) Master in Software Engineering & Artificial Intelligence Master in Software Engineering & Artificial Intelligence Computer Science Department University of Malaga Juan Antonio Martin Checa 2011 2011
  • 2. “Before God we are all equally wise - and equally foolish.” 2
  • 3. “Before God we are all equally wise - and equally foolish.” -Albert Einstein 3
  • 4. You might be wondering... You might be wondering... What is this about? eSOA: Service Oriented Architecture for Embedded Networks 4
  • 5. Index of contents Index of contents 1. Introduction 1. Introduction 2. SOA (Service-Oriented Architecture) 2. SOA (Service-Oriented Architecture) 3. eSOA (SOA for Embedded Systems) 3. eSOA (SOA for Embedded Systems) 4. Related Work 4. Related Work 5. Future Work 5. Future Work 6. Conclusions 6. Conclusions eSOA: Service Oriented Architecture for Embedded Networks 5
  • 6. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1. Introduction 1. Introduction 1.1 The Internet of Things (IoT) 1.1 The Internet of Things (IoT) 1.2 The Internet of Services (IoS) 1.2 The Internet of Services (IoS) 1.3 Services 1.3 Services 1.4 WSDL (Web Services Description Language) 1.4 WSDL (Web Services Description Language) 1.5 SOAP (Simple Object Access Protocol) 1.5 SOAP (Simple Object Access Protocol) eSOA: Service Oriented Architecture for Embedded Networks 6
  • 7. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.1 The Internet of Things (IoT) 1.1 The Internet of Things (IoT) “self-configuring wireless network of sensors which purpose would be to interconnect all things” eSOA: Service Oriented Architecture for Embedded Networks 7
  • 8. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.1 The Internet of Things (IoT) 1.1 The Internet of Things (IoT) every single object unique ID device (radio tag) IPv6 2128 addresses time no common / linear dimension management of massive parallel IT systems ambient intelligence own / shared goals eSOA: Service Oriented Architecture for Embedded Networks 8
  • 9. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.2 The Internet of Services (IoS) 1.2 The Internet of Services (IoS) “next-generation of the services revolution” eSOA: Service Oriented Architecture for Embedded Networks 9
  • 10. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.2 The Internet of Services (IoS) 1.2 The Internet of Services (IoS) “a new business model that can radically change the way we discover and invoke services“ eSOA: Service Oriented Architecture for Embedded Networks 10
  • 11. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.2 The Internet of Services (IoS) 1.2 The Internet of Services (IoS) “worldwide, trusted service ecosystem of service providers, consumers, and brokers, buying, selling, repurposing, and composing services for different needs resulting in a new way of organizing the interaction between partner ecosystems and customer base” eSOA: Service Oriented Architecture for Embedded Networks 11
  • 12. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.3 Services 1.3 Services Types of Service Business Service e-Service Web Service (WS) eSOA: Service Oriented Architecture for Embedded Networks 12
  • 13. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.3 Services 1.3 Services Lifecycle of Services: Discovery, Invocation, & Execution eSOA: Service Oriented Architecture for Embedded Networks 13
  • 14. 14
  • 15. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.3 Services 1.3 Services Atomic Vs Composite Services Atomic Service: provides a basic functionality Composite Service: +2 atomic/composite services (superior functionality) eSOA: Service Oriented Architecture for Embedded Networks 15
  • 16. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.3 Services 1.3 Services WS 1st-Generation WS Platform WDSL (Web Services Description Language) XSD (XML Schema Definition Language) SOAP (Simple Object Access Protocol) UDDI (Universal Description Discovery & Integration) WS-I Basic Profile eSOA: Service Oriented Architecture for Embedded Networks 16
  • 17. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.3 Services 1.3 Services WS eSOA: Service Oriented Architecture for Embedded Networks 17
  • 18. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.3 Services 1.3 Services WS 2nd-Generation WS Platform WS-Security (and WS-SX) (WS- extensions) WS-Coordination WS-AtomicTransaction WS-BusinessActivity (and WS-TX) WS-ReliableMessaging (and WS-RX) WS-Policy WS-Addressing eSOA: Service Oriented Architecture for Embedded Networks 18
  • 19. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.4 WSDL (Web Services Description Language) 1.4 WSDL (Web Services Description Language) XML-based language “model for describing WS ... as a collection of related endpoints (ports)” eSOA: Service Oriented Architecture for Embedded Networks 19
  • 20. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.4 WSDL (Web Services Description Language) 1.4 WSDL (Web Services Description Language) eSOA: Service Oriented Architecture for Embedded Networks 20
  • 21. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.5 SOAP (Simple Object Access Protocol) 1.5 SOAP (Simple Object Access Protocol) XML-based protocol “lightweight protocol intended for exchanging structured information in a decentralized, distributed environment” eSOA: Service Oriented Architecture for Embedded Networks 21
  • 22. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 1.5 SOAP (Simple Object Access Protocol) 1.5 SOAP (Simple Object Access Protocol) eSOA: Service Oriented Architecture for Embedded Networks 22
  • 23. You might be wondering... You might be wondering... OK, so... What is SOA? eSOA: Service Oriented Architecture for Embedded Networks 23
  • 24. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2. SOA 2. SOA 2.1. Overview 2.1. Overview 2.2. Fundamental Design Terms 2.2. Fundamental Design Terms 2.3. Service-Oriented Computing 2.3. Service-Oriented Computing 2.4. Service-Oriented Architecture 2.4. Service-Oriented Architecture (SOA) (SOA) eSOA: Service Oriented Architecture for Embedded Networks 24
  • 25. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2.1 Overview 2.1 Overview SOA “a paradigm for organizing and utilizing distributed capabilities that may be under the control of different ownership domains.[...] It provides a uniform means to offer, discover, interact with and use capabilities to produce desired effects consistent with measurable preconditions and expectations.” - OASIS (Organization for the Advancement of Structured Information Standard) eSOA: Service Oriented Architecture for Embedded Networks 25
  • 26. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2.2 Fundamental Design Terms 2.2 Fundamental Design Terms eSOA: Service Oriented Architecture for Embedded Networks 26
  • 27. 27
  • 28. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2.3 Service-Oriented Computing (SOC) 2.3 Service-Oriented Computing (SOC) SOC “a new generation distributed computing platform characterized by its distinct architectural model, design paradigm, and design principles, that includes design pattern catalogs, pattern languages, as well as related concepts, technologies, and frameworks.” eSOA: Service Oriented Architecture for Embedded Networks 28
  • 29. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2.3 Service-Oriented Computing (SOC) 2.3 Service-Oriented Computing (SOC) SOC Goals & Benefits Increased Intrinsic Interoperability Increased Organizational Agility Increased Business-Technology Alignment Increased Federation Increased Vendor Diversification Increased ROI Reduced IT Burden eSOA: Service Oriented Architecture for Embedded Networks 29
  • 30. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2.4 Service-Oriented Architecture (SOA) 2.4 Service-Oriented Architecture (SOA) SOA Elements eSOA: Service Oriented Architecture for Embedded Networks 30
  • 31. 31
  • 32. 32
  • 33. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 2.4 Service-Oriented Architecture (SOA) 2.4 Service-Oriented Architecture (SOA) SOA Principles 1. Standardized Service Contract 2. Service Loose Coupling 3. Service Abstraction 4. Service Reusability 5. Service Autonomy 6. Service Statelessness 7. Service Discoverability 8. Service Composability 9. Service Optimization 10. Service Relevance 11. Service Encapsulation eSOA: Service Oriented Architecture for Embedded Networks 33
  • 34. You might be wondering... You might be wondering... A-ha! I know about SOA, but... what is e-SOA? eSOA: Service Oriented Architecture for Embedded Networks 34
  • 35. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3. eSOA 3. eSOA 3.1. Overview 3.1. Overview 3.2. Embedded Networks Requirements 3.2. Embedded Networks Requirements 3.3. eSOA 3.3. eSOA 3.4. eSOA Middleware Design Principles 3.4. eSOA Middleware Design Principles 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 3.6. eSOA Middleware Example: Smart 3.6. eSOA Middleware Example: Smart Home Home eSOA: Service Oriented Architecture for Embedded Networks 35
  • 36. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.1 Overview 3.1 Overview Past: isolated embedded systems Nowadays: connect & integrate daily-life devices into distributed embedded networks SOA: the most extended/widely adopted strategy for implementing complex, heterogeneous, and large IT systems worldwide (based on WS) Connecting WS-embedded devices: essential eSOA: Service Oriented Architecture for Embedded Networks 36
  • 37. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.2. Embedded Networks Requirements 3.2. Embedded Networks Requirements 1. Heterogeneity 2. Distributed Architecture 3. Reconfigurable Architecture 4. Resource Limitations 5. Scalable Functionality 6. Error Detection and Recovery 7. End-User Programming 8. Bridging eSOA: Service Oriented Architecture for Embedded Networks 37
  • 38. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.3. eSOA 3.3. eSOA KEY IDEAS: SOA is pretty good. If SOA is so good, why not taking advantage of it for embedded networks? eSOA: Service Oriented Architecture for Embedded Networks 38
  • 39. 39
  • 40. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.3. eSOA 3.3. eSOA PROBLEM: SOA cannot be applied directly to embedded networks eSOA: Service Oriented Architecture for Embedded Networks 40
  • 41. WS-world e-world eSOA 41
  • 42. 42
  • 43. WS-world e-world eSOA request-response messages data-driven messages WS instances not shared e-services states shared robust hw infrastructures hw constraints (CPU, mem) 43
  • 44. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.4. eSOA Middleware Design Principles 3.4. eSOA Middleware Design Principles Embedded Networks Layers Architecture eSOA: Service Oriented Architecture for Embedded Networks 44
  • 45. 45
  • 46. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation “the result of [the] code generation [...] is an optimized, tailored middleware with embedded and already configured services that implement the application logic. The main task of the middleware is to connect the different services involved independent[ly] of their location (local or remote).” - Sholz, A , Gapanova, I., Sommer, S., Buckl, C. eSOA: Service Oriented Architecture for Embedded Networks 46
  • 47. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation Network Architecture eSOA: Service Oriented Architecture for Embedded Networks 47
  • 48. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation Features 1. Efficient Distributed Data Processing 2. Metadata-Aided Service Composition 3. Run-Time Adaptability 4. Integration with External Services eSOA: Service Oriented Architecture for Embedded Networks 48
  • 49. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 1. Efficient Distributed Data Processing Efficient Platform-Specific Code Generation Event-Based Data Processing Distributed Execution of Applications eSOA: Service Oriented Architecture for Embedded Networks 49
  • 50. Node Architecture Efficient Platform-Specific Code Generation Event-Based Data Processing Distributed Execution of Applications 50
  • 51. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 2. Metadata-Aided Service Composition End-user Programming average non-expert users: application (no implementation) - chose the most suitable application pattern (repository) - assign hw services to slots defined by the selected pattern - select logic services experienced users: - develop their own application patterns programmers: - develop logic services eSOA: Service Oriented Architecture for Embedded Networks 51
  • 52. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 2. Metadata-Aided Service Composition (Semi-) Automatic Service Composition Case: subnets of identical / similar structure (re-)configuration of every single subnet: tedious Solution: application patterns automation - changes easily propagable between installations based on the same application pattern - application patterns easily inferred (by inspecting available services) suggestions for new installations eSOA: Service Oriented Architecture for Embedded Networks 52
  • 53. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 3. Run-Time Adaptability Embedded networks: frequently dynamic - Nodes: new, reconfigured, unavailable, removed, mobile - Node failures: Local Vs Global recovery Local: redundant eServices / com. channels Global: switching targeted application - Node adaptation: to new applications eSOA: Service Oriented Architecture for Embedded Networks 53
  • 54. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services Interaction Schemes IP-compatible Addressing Service Bridge eSOA: Service Oriented Architecture for Embedded Networks 54
  • 55. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services eSOA: Service Oriented Architecture for Embedded Networks 55
  • 56. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services Interaction Schemes 1. Continuous Interaction with the eNetwork 2. Ad-hoc Interaction with the eNetwork 3. Continuous Interaction with external WS 4. Ad-hoc Interaction with external WS eSOA: Service Oriented Architecture for Embedded Networks 56
  • 57. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services Interaction Schemes Continuous Interaction with the eNetwork - Subscriptions low communication overhead support of non-periodic interactions managed by WS-Eventing, etc. eSOA: Service Oriented Architecture for Embedded Networks 57
  • 58. 58
  • 59. 59
  • 60. 60
  • 61. 61
  • 62. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services Interaction Schemes Ad-hoc Interaction with the eNetwork - RPC-style WS invocations - - RPC (Remote Procedure Call) - - not planned beforehand Client RPC call (+data) Server process data response eSOA: Service Oriented Architecture for Embedded Networks 62
  • 63. 63
  • 64. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services Interaction Schemes Continuous Interaction with external WS - Stream-based paradigm (embedded network) necessity of retrieving / sending data from/to an external WS on a periodic basis eSOA: Service Oriented Architecture for Embedded Networks 64
  • 65. 65
  • 66. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services Interaction Schemes Ad-hoc Interaction with external WS not necessary not contemplated eServices have no knowledge about the specific wiring reconfigurations of applications are only triggered by WS end- users or the middleware itself, but never by eServices. eSOA: Service Oriented Architecture for Embedded Networks 66
  • 67. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services IP-compatible Addressing all the devices in eSOA have an IP address Service Bridge: - monitors all incoming messages at Network Layer - translates messages into the suitable packet format - forwards messages to the targeted eService eSOA: Service Oriented Architecture for Embedded Networks 67
  • 68. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.5. eSOA Middleware Implementation 3.5. eSOA Middleware Implementation 4. Integration with External Services IP-compatible Addressing eSOA: Service Oriented Architecture for Embedded Networks 68
  • 69. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 3.6. eSOA Middleware Example: Smart Home 3.6. eSOA Middleware Example: Smart Home eSOA: Service Oriented Architecture for Embedded Networks 69
  • 70. 70
  • 71. You might be wondering... You might be wondering... Oh! I think I got it! but... where does e-SOA fits? eSOA: Service Oriented Architecture for Embedded Networks 71
  • 72. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 4. Related Work 4. Related Work AUTOSAR TinyDB KNX Cougar RUNES SIRENA M O R E S-O-C-R-A-D-E-S eSOA: Service Oriented Architecture for Embedded Networks 72
  • 73. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 5. Future Work 5. Future Work --Improve application execution (data stream management tech) Improve application execution (data stream management tech) --Evaluate different service placement strategies Evaluate different service placement strategies --Automatic learning of service patterns (repository of apps) Automatic learning of service patterns (repository of apps) --Application level connectivity at the routing layer Application level connectivity at the routing layer routing optimization, low overhead (protocols //routing tables) routing optimization, low overhead (protocols routing tables) --Enrichment of the semantic descriptions of services Enrichment of the semantic descriptions of services select the most suitable service (service repository) select the most suitable service (service repository) --Interface for discovery //integration of field-level devices & WS Interface for discovery integration of field-level devices & WS UDDI registries //query interfaces (TinyDB) UDDI registries query interfaces (TinyDB) eSOA: Service Oriented Architecture for Embedded Networks 73
  • 74. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions Internet of Things Internet of Things connect // integrate daily-life devices connect integrate daily-life devices into distributed embedded into distributed embedded networks networks connect WS & embedded devices connect WS & embedded devices eSOA: Service Oriented Architecture for Embedded Networks 74
  • 75. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions Service-Oriented Architecture (SOA) Service-Oriented Architecture (SOA) most extended and widely most extended and widely adopted strategy for adopted strategy for implementing complex, implementing complex, heterogeneous, and large IT heterogeneous, and large IT systems systems eSOA: Service Oriented Architecture for Embedded Networks 75
  • 76. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions Service-Oriented Architecture (SOA) Service-Oriented Architecture (SOA) Service: contract, loose coupling, Service: contract, loose coupling, abstraction, reusability, autonomy, abstraction, reusability, autonomy, statelessness, discoverability, statelessness, discoverability, composability, optimization, relevance composability, optimization, relevance & encapsulation & encapsulation Web Services (WS) Web Services (WS) eSOA: Service Oriented Architecture for Embedded Networks 76
  • 77. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions Embedded Networks Embedded Networks heterogeneity, distributed // reconfigurable heterogeneity, distributed reconfigurable architecture, resource limitations, architecture, resource limitations, scalable functionality, error detection & scalable functionality, error detection & recovery, end-user programming, and recovery, end-user programming, and bridging bridging eServices eServices eSOA: Service Oriented Architecture for Embedded Networks 77
  • 78. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions SOA Vs Embedded Networks SOA Vs Embedded Networks SOA not applicable directly to eNetworks SOA not applicable directly to eNetworks need for intermediary need for intermediary eSOA eSOA eSOA: Service Oriented Architecture for Embedded Networks 78
  • 79. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions SOA architecture SOA architecture Application Layer Application Layer Service Layer Service Layer Abstract Infrastructure Layer Abstract Infrastructure Layer eSOA: Service Oriented Architecture for Embedded Networks 79
  • 80. 1. Introduction 2. SOA 3. eSOA 4. Related Work 5. Future Work 6. Conclusions 6. Conclusions 6. Conclusions SOA middleware SOA middleware Efficient Distributed Data Processing Efficient Distributed Data Processing Metadata-Aided Service Composition Metadata-Aided Service Composition Run-Time Adaptability Run-Time Adaptability Integration with External Services Integration with External Services eSOA: Service Oriented Architecture for Embedded Networks 80
  • 81. You might be thinking... You might be thinking... Now you can Now you can impress your impress your friends talking friends talking about SOA ... about SOA ... please, ask! please, ask! eSOA: Service Oriented Architecture for Embedded Networks 81
  • 82. 82
  • 83. 83
  • 84. Thomas Erl 84
  • 85. “By learning you will teach, by teaching you will learn.” “You see things; and you say, 'Why?' But I dream things that never were; and I say, ‘Why not?’” 85
  • 86. “By learning you will teach, by teaching you will learn.” - Latin Proverb “You see things; and you say, 'Why?' But I dream things that never were; and I say, ‘Why not?’” - George Bernard Shaw 86
  • 87. eSOA: Service Oriented eSOA: Service Oriented Architecture for embedded Architecture for embedded networks networks (Software Systems Methodological Foundations) (Software Systems Methodological Foundations) Master in Software Engineering & Artificial Intelligence Master in Software Engineering & Artificial Intelligence Computer Science Department University of Malaga Juan Antonio Martin Checa 2011 2011