How SOAP server process the requests

The SOAP server receives the request from the client as an HTTP request. The request is passed to the HTTP request handler that redirects the request to the appropriate SOAP servlet. This SOAP servlet is responsible for decoding the HTTP request. The SOAP servlet directs the request to the HTTP/SOAP decoder. The decoder extracts the [...]

Explain SOAP messaging model

The client application discovers a server application by using its discovery document and makes a service call to the server application by invoking its appropriate method. The SOAP serializer converts the invocation by the client application to a SOAP request. The SOAP serializer sends the SOAP request to an HTTP encoder, which wraps the SOAP [...]

Explain SOAP messaging model

The client application discovers a server application by using its discovery document and makes a service call to the server application by invoking its appropriate method. The SOAP serializer converts the invocation by the client application to a SOAP request. The SOAP serializer sends the SOAP request to an HTTP encoder, which wraps the SOAP [...]

What are SOAP attribtutes

A client can use SOAP attributes to specify how SOAP messages should be processed. SOAP attributes are generally used to specify the serialization rules to indicate the recipient of the Header element of the SOAP message. Attributes also indicate whether or not the recipient should process certain header entries. example1: The mustUnderstand attribute states whether [...]

What is SOAP fault

SOAP defines a Fault element that is used to indicate errors that might be raised when the SOAP message is processed. The Fault element is defined below: <soap:Fault> <faultcode>SOAP-ENV:Server.BadTargetObjectURI</faultcode> <faultstring>Unable to resolve target object: HelloWorld</faultstring> </soap:Fault> After you include the Fault element described above, every time the target URI is irresolvable, the application will return [...]

Why SOAP header is optional

Tthe Header element is optional in a SOAP message. If the Header element is present in a SOAP message, it should be the first child element of the Envelope element. To understand why a SOAP header element is optional, consider a scenario in which you want to invoke a Web method of a Web service [...]

Explain different Web Services communication Models

RPC-Based Communication Model The RPC-based communication model defines a request/response-based synchronous communication. When the client sends a request, the client waits until a response is sent back from the server before continuing any operation. Typical to implementing CORBA or RMI communication, the RPC-based Web services are tightly coupled and are implemented with remote objects to [...]

Define ebXML

ebXML provides a standard framework for building an electronic marketplace by enabling the standardization of business processes, business partner profiles, and partner agreements. In general, ebXML complements other Web services standards like SOAP, WSDL, and UDDI. The following are major features of ebXML: ebXML Messaging Service (MS) is a value-add over SOAP that provides reliability [...]

Define UDDI

Universal Description, Discovery, and Integration, or UDDI, defines a mechanism to register and categorize Web services in a general-purpose registry that users communicate to in order to discover and locate registered services. While querying a UDDI registry for a service, the WSDL description describing the service interface will be returned. Using the WSDL description, the [...]

Define SOAP

SOAP is an XML-based protocol that is used to access services, objects, and servers in a platform- and vendor- independent manner.it is an XML-based protocol.SOAP generally uses HTTP, a firewall-friendly protocol, as its transport protocol. SOAP includes three components: SOAP messages, SOAP attributes, and SOAP encoding. SOAP Messages SOAP is an XML-based protocol, SOAP messages [...]

Explain benefits of web services

Provides a simple mechanism for applications to become services that are accessible by anyone, anywhere, and from any device. Defines service-based application connectivity facilitating EAI, and intra-enterprise and inter-enterprise communication. Defines a solution for businesses, which require flexibility and agility in application-to-application communication over the Internet. Enables dynamic location and invocation of services through service [...]

What are disadvantages/challenges in web services

Distributed transactions. If the environment requires distributed transactions with heterogeneous resources, it should be studied and tested with standard solutions based on BTP, WS-Transactions, and WS-Coordination. Quality of Service (QoS). In case of a mission-critical solution, the service providers must examine the reliability and performance of the service in peak load and uncertain conditions for [...]

What is WSDL

The Web Services Definition Language (WSDL) standard is an XML format for describing the network services and its access information. WSDL is used as the metadata language for defining Web services and describes how service providers and requesters communicate with one another. WSDL describes the Web services functionalities offered by the service provider, where the [...]

Explain Basic Architecture of Web Services

Service provider. The service provider is responsible for developing and deploying the Web services. The provider also defines the services and publishes them with the service broker. Service broker. The service broker (also commonly referred to as a service registry) is responsible for service registration and discovery of the Web services. The broker lists the [...]

Why to use webservices

Web services can be invoked through XML-based RPC mechanisms across firewalls. Web services provide a cross-platform, cross-language solution based on XML messaging. Web services facilitate ease of application integration using a lightweight infrastructure without affecting scalability. Web services enable interoperability among heterogeneous applications.

What are Web Services

Web services are based on the concept of service-oriented architecture (SOA). SOA is the latest evolution of distributed computing, which enables software components, including application functions, objects, and processes from different systems, to be exposed as services. Web services are loosely coupled software components delivered over Internet standard technologies.” Web services are self-describing and modular [...]