XML-RPC works by encoding the RPC requests into XML and sending them over a standard HTTP connection to a server or listener piece. XML (eXtensible Markup Language) is a well known standard for storing, carrying, and exchanging data. The calling program then continues executing. The RPC server bundles up the results of the procedure and sends those results back to the caller. Remote Procedure Calls (RPC) is a concept of client/server system, RPCs have traditionally been procedures called in a program on one machine that go over the network to some RPC server that actually implements the called procedure. RPC is a set of tools that allow you to write a program whose different parts are on different computers, without having to worry about how the communication happens. When one part of a program calls on another part to do some work, the action is called a procedure call. Its a processing model and can be carried by a variety of network protocols such as HTTP, SMTP, FTP. SOAP 1.2 provides a standard framework for packaging and exchanging XML messages. Webservice can be used in different ways:Ĥ. Message delivery policy is related to delivery of messages.Īn address is that information required by a message transport mechanism in order to deliver a message appropriately. This mechanism deliver a message based on the information in the envelope. It is considered as final recipient and responsible for completing the processing of message.Ī message body is the structure that represents the primary application-specific content that the message sender intends to deliver to the message recipient.Ī message header is the part of the message that contains information about a specific feature of the message.Ī message envelope contains message body and message header.Ī message is delivered by message transport system. Message receiver is an agent that receive messages. It has got the following:Ī message sender delivers message to message recepient.
Message is a data sent from one agent to another which is a simple XML document. The provider entity provides a provider agent that implements a particular service and interacts with requester entity which make use of provider web services and exchange messages. An agent is a program that works on your behalf. The purpose of a Web service is to provide some functionality on behalf of a person or an organization. Web services distributed computing model allows application-to-application communication. XML is used to tag the data, SOAP is used to transfer the data, WSDL is used for describing the services available and UDDI is used for listing what services are available. Web services describes a way of integrating web based applications using XML, SOAP, WSDL and UDDI open standards over an internet protocol.
Other systems interact with the Web service by its description using SOAP messages, using HTTP with an XML serialization in conjunction with other Web-standards. It has an interface described in a machine-processable format (WSDL). A Web service is designed to support interoperable machine-to-machine interaction over a network. It is self contained, self describing and can be used by other applications. Web services are application components that communicates through open protocols.
0 kommentar(er)
