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pubsub.go
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pubsub.go
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// Copyright © 2019 The Things Network Foundation, The Things Industries B.V.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package events
import (
"context"
"go.thethings.network/lorawan-stack/v3/pkg/ttnpb"
)
// PubSub interface combines the Publisher and Subscriber interfaces.
type PubSub interface {
Publisher
Subscriber
}
// Publisher interface lets you publish events.
type Publisher interface {
// Publish emits an event on the default event pubsub.
Publish(evs ...Event)
}
// Subscriber interface lets you subscribe to events.
type Subscriber interface {
// Subscribe to events that match the names and identifiers.
// The subscription continues until the context is canceled.
// Events matching _any_ of the names or identifiers will get sent to the handler.
// The handler must be non-blocking.
Subscribe(ctx context.Context, names []string, identifiers []*ttnpb.EntityIdentifiers, hdl Handler) error
}
// Subscription is the interface for PubSub subscriptions.
type Subscription interface {
// Match returns whether the event matches the subscription.
Match(Event) bool
// Notify notifies the subscription of a new matching event.
Notify(Event)
}