Y::Notifier - Specification - The publish/subscribe model

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• A fairly obvious/standard model of IPC
• Client programs subscribe to subjects and/or publish messages
• Messages consist of
• A Subject - string
• "name1.name2.name3...namen" (period-separated, heirachical)
• A Body - hashref
• { $key => $value, ... }
• A client subscribing to a subject can use wildcards
• "name1.*.name3.>"
• The * matches any name at that point
• The > matches one or more names up to the end of the subject (it must be last, if used)
• Wildcards only match whole names
• Publishers just send a message (a subject and a body)
• There is no declared recipient of the message beyond its subject
• Message subjects cannot contain wildcards

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Y::Notifier - Specification - The publish/subscribe model