| copyright | lastupdated | ||
|---|---|---|---|
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2017-04-27 |
{:new_window: target="_blank"} {:shortdesc: .shortdesc} {:screen: .screen} {:codeblock: .codeblock} {:pre: .pre}
{{site.data.keyword.messagehub}} implements publish/subscribe messaging using topics. Unlike other messaging systems, {{site.data.keyword.messagehub}} provides topics but not queues. {{site.data.keyword.messagehub}} also offers additional capabilities such as the {{site.data.keyword.mql}} API and bridges to other systems.
{{site.data.keyword.messagehub}} has three APIs: the Kafka API, the {{site.data.keyword.mql}} API and the Kafka REST API. For more information about creating messaging applications using the APIs, see Using a Kafka client, Using an MQ Light API client, and Using the Kafka REST API.
{{site.data.keyword.messagehub}} also supports bridges to a selection of other systems. A bridge is a unidirectional link to another system. A bridge can take messages from the other system and publish them onto a topic, or consume messages from a topic and send them to the other system. In this way, you can use {{site.data.keyword.messagehub}} to integrate with other systems without writing code. For more information, see Linking to other services using bridges.
{{site.data.keyword.messagehub}} is based on the open-source Apache Kafka project, a highly scalable, high-performing messaging backbone proven in many production environments. For more information, see {{site.data.keyword.messagehub}} and Apache Kafka.