Service Oriented Architecture + SOAP -Robin John.

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Presentation transcript:

Service Oriented Architecture + SOAP -Robin John

Service Oriented Architecture:  Group of services that communicate(data passing or 2 or more services coordinating some activity) with each other to build applications out of software services.  Services as basic constructs.(Service-oriented paradigm to programming utilizes services as the basic constructs to support development of rapid low-cost and easy composition of distr applications.)‏  'Service-oriented' approach to programming(based on idea of composing applications by discovering and invoking network avlbl services rather than building new applications or by invoking avlbl applications to accomplish some task.)‏

SOA tree:

Service Oriented Architecture:  Logical way of designing SW system to provide services to either end-user app or to other services distributed in a network via published and discoverable interfaces.

Principles of SOA:  Guiding principles:  Reuse, interoperability, modularity  Standards compliance  Services identification and categorization, provision and delivery & monitoring and tracking  Specific architectural principles:  Service Encapsulation  Service loose coupling  Service contract  Service abstraction  Service Reusability  Service composability  Service Autonomy  Service Optimization  Service Discoverability

Challenges of SOA:  Managing services meta-data  Lack of testing in SOA space  Appropriate levels of security

SOA to conclude:  Service-Oriented Architecture (SOA) is an architectural approach (or style) for constructing complex software-intensive systems from a set of universally interconnected and interdependent building blocks, called services.

SOAP:  Simple Object Access Protocol:  a light-weight messaging protocol for information exchange in a decentralized, distributed environment built on XML.  consists of 3 parts:  envelope:(message format)‏  encoding rules:  representation convention:

4 main areas covered:  Message format:  Description:  Set of rules:  Set of conventions: Main functionalities:  Send & receive HTTP transport protocol pkts  Process XML messages Heavy weight protocol example:  ORPC

SOAP example:

Applications:  RPC: Remote Procedure Call  EDI: Electronic Document Interchange; basis of automated business transactions.

SOAP faults::  Used to carry error and/or status information within a SOAP message.  4 elements: Fault code: Fault string: Fault actor: Fault details

SOAP Adv and Disadv:  Adv:  Platform, language independent  Use standardised HTTP  Runs over HTTP, and hence avoids firewall filtering  Handles decentralized and distributed environment  Disadv:  Security  Statelessness  Serialization by value, not by reference.

 SOAP: Future THANKYOU !