Services can integrate disparate and distributed applications and data sources. The Enterprise service bus (ESB) is the service middleware enabling service-based integration of multiple assets and resources. The ESB facilitates service interconnectivity, routing, remediation, enrichment, governance, and so on. The ESB is the integration middleware for any service environment, where the message is the basic unit of interaction between services. An ESB is lightweight compared with previous middleware solutions, such as the EAI hub. The ESB is lightweight because it obviates the need of using custom-made connectors, drivers, and adapters for integrating processes/applications, data sources, and UIs.
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