25 lines
758 B
Go
25 lines
758 B
Go
package graphvent
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import (
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)
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// Extensions are data attached to nodes that process signals
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type Extension interface {
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// Called to process incoming signals, returning changes and messages to send
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Process(*Context, *Node, NodeID, Signal) (Messages, Changes)
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// Called when the node is loaded into a context(creation or move), so extension data can be initialized
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Load(*Context, *Node) error
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// Called when the node is unloaded from a context(deletion or move), so extension data can be cleaned up
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Unload(*Context, *Node)
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}
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// Changes are lists of modifications made to extensions to be communicated
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type Changes []string
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func (changes *Changes) Add(fields ...string) {
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new_changes := append(*changes, fields...)
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changes = &new_changes
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}
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