企业集成模式(4)---Spring Integration Components

Spring integration building  blocks 解释，基本上是从原文摘录的，懒得翻译了　：）

Message

A message is a generic wrapper for any Java object combined with metadata used by Spring Integration to handle the object.

Headers

String/Object Map that typically maintains values for message housekeeping chores

Payloads

The message payload can be any POJO

Message Channels

A message channel is the component through which messages are moved.

Message Endpoints

A message endpoint is the abstraction layer between the application code and the messaging framework.

The main endpoint types supported by Spring Integration are as follows:

Transformer

Converts the message content or structure.

Filter

Determines if the message should be passed to the message channel.

Router

Can determine which channel to send a particular message based on its content.

Splitter

Can break an incoming message into multiple messages and send them to the appropriate channel.

Aggregator

Can combine multiple messages into one. An aggregator is more complex than a splitter often required to maintain state.

Service activator

Is the interface between the message channel and a service instance, many times containing the application code for business logic.

Channel adapter

Is used to connect the message channel to another system or transport.

Gateway

A connection that specific to bidierectional messaging

参考资料

spring integration