Orchestration − Integration of two or more services to achieve synchronization between data and process. We can call these principles as core integration principles. The adapter can also perform other activities like security, monitoring, error handling and message routing management. The data or message passing from one application to another through the bus is in a canonical format which means there would be one consistent message format. The concept of “adapter”, responsible for communicating with backend application and transforming data from application format to bus format, is used between applications and bus. The concept of “bus”, which is achieved through a messaging server like JMS or AMQP, is used to decouple different applications from one another. ESB’s implementation can be done with the help of ‘Bus’ and ‘Adapter’ in the following way − The main focus of ESB architecture is to decouple the systems from each other and allow them to communicate in a steady and controllable way. In this way, with the help of ESB architecture we can connect different applications through a communication bus and enable them to communicate without depending on one another. Fundamentally, it is an architecture designed to provide a uniform means of moving work among integrated applications. ESB stands for Enterprise Service Bus which is basically a middleware tool for integrating various applications together over a bus-like infrastructure.
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