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node_event_handler_set.go
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node_event_handler_set.go
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// Copyright (C) 2021-2023 Chronicle Labs, Inc.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package sets
type NodeConfiguredEvent struct{}
type NodeStartingEvent struct{}
type NodeHostStartedEvent struct{}
type NodePubSubStartedEvent struct{}
type NodeStartedEvent struct{}
type NodeTopicSubscribedEvent struct{ Topic string }
type NodeTopicUnsubscribedEvent struct{ Topic string }
type NodeStoppingEvent struct{}
type NodeStoppedEvent struct{}
// NodeEventHandlerFunc is a adapter for the NodeEventHandler interface.
type NodeEventHandlerFunc func(event interface{})
// Handle calls f(topic, event).
func (f NodeEventHandlerFunc) Handle(event interface{}) {
f(event)
}
// NodeEventHandler can ba implemented by type that supports handling the Node
// system events.
type NodeEventHandler interface {
// Handle is called on a new event.
Handle(event interface{})
}
// NodeEventHandlerSet stores multiple instances of the NodeEventHandler interface.
type NodeEventHandlerSet struct {
eventHandler []NodeEventHandler
}
// NewNodeEventHandlerSet creates new instance of the NodeEventHandlerSet.
func NewNodeEventHandlerSet() *NodeEventHandlerSet {
return &NodeEventHandlerSet{}
}
// Add adds new NodeEventHandler to the set.
func (n *NodeEventHandlerSet) Add(eventHandler ...NodeEventHandler) {
n.eventHandler = append(n.eventHandler, eventHandler...)
}
// Handle invokes all registered handlers for given topic.
func (n *NodeEventHandlerSet) Handle(event interface{}) {
for _, eventHandler := range n.eventHandler {
eventHandler.Handle(event)
}
}
var _ NodeEventHandler = (*NodeEventHandlerSet)(nil)