This 6-week course covers web services and related technologies. It introduces web service types and standards, including SOAP, REST, WSDL, JAX-WS, JAX-RS and related APIs. It covers XML processing with DTD, XSD, DOM and SAX. Other topics include SOAP messaging, attachments, contracts, service development with implementations like Metro and Axis2, Java to XML mapping with JAXB, and creating RESTful web services and clients with Jersey.

1. Web Services
syllabus
Duration: 6 weeks
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2. Introduction to Web Services
1. Why Web Services?
2. Service-Oriented Architecture
3. Web Services Types and their differences: SOAP and REST
4. SOAP Web Services Standard for Java: JAX-WS (2.2.8)
5. REST Web Services Standard for Java: JAX-RS (2.0)
6. Commonly used implementation of JAX-WS: Metro, Axis2
7. Commonly used implementation of JAX-RS: Jersey, RESTEasy
XML Representation and Parsing
1. Difference b/w Well Formed and valid XML Documents.
2. Use of DTD in validating XML documents.
3. DTD components: element, attribute, entity, PCDATA, CDATA
4. Limitations of DTD
5. XSD and how its removes the limitations of DTD
6. XSD Data types: simple & complex
7. XSD attributes and restrictions
8. XSD occurance indicators
9. XML Schema and namespaces
10.XML Parsers: DOM & SAX
SOAP
1. Introduction to SOAP
2. Namespaces
3. SOAP over HTTP
4. The SOAP Envelope
5. The Message Header
6. The Message Body
7. SOAP Faults
8. Attachments
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3. WSDL
1. The Need for an IDL
2. Web Services Description Language
3. WSDL Information Model
4. The Abstract Model -- Service Semantics
5. Message Description
6. Messaging Styles
7. The Concrete Model -- Ports, Services, Locations
8. Extending WSDL -- Bindings
9. Service Description
JAX-WS and its implementations
1. Service development Approaches
• Contract first approach
• Contract last approach
2. Client development
• Stub based client
• Dynamic proxy based client
• Annotation based client
3. Developing Web Services and Clients using Metro & Axis2 APIs.
Java API for XML Binding (JAXB)
1. Java to XML and vice-versa data mapping using JAXB
2. Mapping POJO to XML using JAXB
3. Mapping Inheritance to XML using JAXB
4. Mapping Collections to XML using JAXB
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4. The SOAP with Attachments API for Java (SAAJ)
1. The SAAJ Object Model
2. Parsing a SOAP Message
3. Reading Message Content
4. Working with Namespaces
5. Creating a Message
6. Setting Message Content
Handling Binary Contents
1. The WS-I Attachments Profile
2. Using base64Binary
3. MIME Attachments
4. JAX-WS Support
5. SAAJ Support
Message Handlers
1. Handling SOAP Headers
2. Servlet Endpoint Context
3. MessageContext and SOAPMessageContext
4. Message Handlers and Handler Chains
5. Processing Model and Patterns
6. Client-Side Handlers
JAX-RS and its implementations
1. Introduction to REST model
2. Role of HTTP get, post, put and delete request type for representational state
3. Using JSON in REST for state transfer
4. Using XML in REST for state transfer
5. Sending attachments to REST web services
6. Creating REST web services using jersey
7. Creating HTTP Clients for REST web services.
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