Message Broker basically allows you to move data from a number of formats (both physical and logical) and manipulate that data before putting it somewhere else, possibly in a different format. It also contains functionality for message routing, collecting, aggregation, sequencing etc. Once the message is in MEssage Broker, you can manipulate that message using ESQL (SQL-like language native to Message Broker), Java, PHP, XSTL. The message queue ensures that the system can continue to take on new inputs at an almost unlimited rate, even if the rest of the chain isn't ready to process those inputs just yet. In terms of transports, it provides MQ, JMS (most providers), MQ-FTE, local files, SMTP, FTP/SFTP, HTTP/HTTPS, TCP/TCPSSL, JDBC and probably some other entry hooks I have forgotten. The message broker ensures that the system can take in each new message and store it if it's not yet at a stage where it can be processed. WebSphere Message Broker is a program that attempts to provide an any-transport-to-any-transport interface, and an any-language transformation engine. WebSphere MQ basically lets you put a message in one place and get that message somewhere else with the smallest chance of the message being lost. As of WebSphere MQ version 7.0.1 it also provides a publish-subscribe engine. There are two main differences between message queues and event streams. It also has a number of APIs native to MQ. Low-latency message queue & broker software. MQ provides an API interface that implements JMS. MQ provides a Queue Manager: a server application that hosts Queues (to hold messahes) and Channels & Listeners (to allow Queue Managers to communicate with each other). WebSphere MQ is a messaging engine that provides assured delivery of some message/payload.
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