Connecting Dots

Scalability is a desirable property of any SAAS based architecture to have the ability to handle growing amounts of work in a graceful manner. Typically there can be two types of scalability issues- increase in load and administrative scalability. SAAS Architecture Different Tiers • Data Storage Tier • Data Access Tier • Application Tier o Identity Management . Separate Identity Management solution. . Authentication using LDAP. . Sun Java Identity Management Suite2 / Microsoft Active Directory. o Application server . What frame-work to use. o Integration Server . How the corporations integrate to the existing data sources. . Build a Web Service API to interact with Corporate data source. . Enterprise integration Server (EI) for corporate data access. . Host an EI Server. . Need to handle

Web Services is one of those concepts made all the more difficult to understand because of the myriad acronyms and abbreviations that are superfluous in any discussion. Covering all the concepts and standards associated with Web Services is a vast topic in itself. There are a large number of standards around Web Services. These standards define the norms of a Web Services implementation and ensure that a Web Services is accessed independently of the client platform. There are numerous frameworks available to select to build web service today. Below is the most widely used ones. Product Does it fit my need? Axis2.0 Apache Axis2 is a complete re-design and re-write of the widely used Apache Axis SOAP stack to build on the lessons learnt from Apache Axis. An advantage of Axis 2 is its support for the binding frameworks XMLBeans. Axis 2 with XMLBeans is widely

Wikipedia has listed over 85 web applications frame works with Java based on the top – 28. Below table lists of most widely used web Application Frameworks products available today. Product what type of project is best fit? Struts 2 The new version Struts 2.0 is a combination of the Sturts action framework and Webwork (a total redesign). Struts2 may a good fit for an enterprise application when there is existing Struts resource and projects of medium complexity. Spring MVC Good choice for medium sized project. Convention-based defaults for controllers, model object names, and view resolves. Spring MVC addresses request-driven processing at the HTTP level. It does not aim to provide a component model like JSF. Stripes

We will use the same WSDL document that we used in our earlier example. The contract is given below: Step: 1 Run the wsdl2java tool to generate the requires service class, JAXB input output message classes. wsdl2java.bat -d src -ant -impl -server rateService.wsdl This command will generate: JAXB Input and Output message classes, Service Interface, Service Implementation class, Standalone Server class and an ant build file to build the service. If you open up these files in the editor, then you see various JAXB annotations on classes and methods which are used to map a Java class to XML. It will also generate Request and Response Wrapper classes as with the JAX-WS specification. It also generate Request and Response Wrapper classes as with the JAX-WS specification

Apache CXF is an open source services framework. CXF helps you build Web Services using frontend programming APIs, like JAX-WS and JAX-RS. These services can speak a variety of protocols such as SOAP, XML/HTTP, RESTful HTTP, or CORBA and work over a variety of transports such as HTTP, JMS or JBI. Support for bottom up approach and top down approach. Support for Standards JAX-WS, JSR-181, SAAJ, JAX-RS SOAP 1.1, 1.2, WS-I BasicProfile, WS-Security, WS-Addressing, WS-RM, WS-Policy WSDL 1.1 MTOM Building Web Services – Example 1 Develop a simple Web Service using CXF framework. The example in this case is an InterestRate Service. Tools / technologies Version CXF 2.1 Maven 2.0 Tomcat apache-tomcat-6.0.24 JDK java version 1.6.0_20       The Application Scope The "Interest Rate Service" application demonstrates how easily you can develop a Web Service using CXF frame work. The WSDL service definition defines three operations. Below is the InterestRateService interface.   @WebS