MigratoryData is a messaging system based on a subject-based publish/subscribe model, also known as a topic-based publish/subscribe model. Therefore, the terms subjects and topics can be used interchangeably.
A subject is used by a subscriber client to listen for all messages published to that subject. Also, it is used by a publisher client to publish messages on that subject.
A subject is a string of UTF-8 characters similar to Unix absolute paths. It begins with a slash (/) and consists of one or more non-empty segments separated by a slash (/).
For example, the string
/Stocks/NYSE/IBM is a valid subject, as it is composed of three non-empty segments
IBM. These are examples of invalid subjects:
|The second segment is empty
|It does not start with a slash (
|The last segment is empty