Web Services (SOAP) part 1 Eriq Muhammad Adams J |

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Presentation transcript:

Web Services (SOAP) part 1 Eriq Muhammad Adams J |

* Web Service * When do we use web service ? * Web services in Java EE * Exposing Service as Web Services * Demo

* W3C say : A Web service is a software system designed to support interoperable machine-to-machine interaction over a network. It has an interface described in a machine processable format (specifically WSDL).Other systems interact with the Web service in a manner prescribed by its description using SOAP messages, typically conveyed using HTTP with an XML serialization in conjunction with other Web-related standards.

* Web Service Architecture

* UDDI : Universal Description, Discovery, and Integration provides a standards-based approach to locating a web service, and information on invoking that service. It also provides additional metadata about the service. Currently reach ver. 3. * WSDL : Web Services Description Language (WSDL) is a technology that is used to describe the interface of a service using XML, is a standard developed by the W3C. Currently reach ver. 2. * SOAP : Simple Object Access Protocol (SOAP) is an XML-based protocol used for exchanging information in a decentralized and distributed environment using XML, is a standard developed by the W3C. Currently reach ver. 2.

* If we want to expose our API to 3 rd parties * Most enterprises use it such FedEx, UPS, Amazon, Google, eBay, Twitter, Facebook, Yahoo!, etc.

* JAX-WS (Java API for XML Web Services) : defines Java APIs and annotations for accessing web services from Java applications and Java EE components like EJBs, provide mapping between Java and WSDL. * JAX-B (Java Architecture for XML Binding) : provides standard APIs for representing XML documents as Java artifacts. * JAXR (Java API for XML Registries) : defines a standard set of APIs that allow Java clients to access the registry. * SAAJ (SOAP with Attachments API for Java) : defines a standard set of APIs that allow Java SE or EE components to construct SOAP messages with attachments.

* JSR 181 (Web Services Metadata for the Java Platform) : defines a standard set of annotations that can be used to simplify web service development.

* Demo available in HelloWebServiceModule.zip