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Introduction WSO2 Enterprise Service Bus (ESB) is a lightweight, high performance, comprehensive ESB to enable interoperability among various heterogeneous systems and business applications. WSO2 ESB effectively supports integration standards and patterns. Overview Application infrastructure on the enterprises may be inherently complex, comprising hundreds of applications with completely different semantics. Some of these applications are custom built, some are acquired from third parties, and some can be a combination of both and can be operating in different system environments. Integration among these heterogeneous applications is vital to the enterprise. Different services may be using different data formats and communication protocols. Physical locations of services can change arbitrarily. All these constraints mean your applications are still tightly coupled together. An ESB can be used to loosen these couplings between different services and service consumers. WSO2 E...