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receiver.go
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receiver.go
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// Copyright 2020 Comcast Cable Communications Management, LLC
//
// 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 plugin
import (
"context"
"fmt"
"github.com/xmidt-org/ears/pkg/tenant"
"sync"
pkgmanager "github.com/xmidt-org/ears/pkg/plugin/manager"
pkgreceiver "github.com/xmidt-org/ears/pkg/receiver"
)
var _ pkgreceiver.Receiver = (*receiver)(nil)
type receiver struct {
sync.Mutex
id string
name string
plugin string
hash string
tid tenant.Id
manager *manager
active bool
receiver pkgreceiver.Receiver
done chan struct{}
}
func (r *receiver) Config() interface{} {
return r.receiver.Config()
}
func (r *receiver) Name() string {
return r.name
}
func (r *receiver) Plugin() string {
return r.plugin
}
func (r *receiver) Tenant() tenant.Id {
return r.tid
}
func (r *receiver) Receive(next pkgreceiver.NextFn) error {
if r == nil {
return &pkgmanager.NilPluginError{}
}
if next == nil {
return &pkgreceiver.InvalidConfigError{
Err: fmt.Errorf("next cannot be nil"),
}
}
{
r.Lock()
if !r.active {
r.Unlock()
return &NotRegisteredError{}
}
r.Unlock()
}
// Block
return r.manager.receive(r, next)
}
func (r *receiver) StopReceiving(ctx context.Context) error {
if r == nil {
return &pkgmanager.NilPluginError{}
}
{
r.Lock()
if !r.active {
r.Unlock()
return &NotRegisteredError{}
}
r.Unlock()
}
return r.manager.stopReceiving(ctx, r)
}
func (r *receiver) Unregister(ctx context.Context) error {
if r == nil {
return &pkgmanager.NilPluginError{}
}
{
r.Lock()
if r.manager == nil || !r.active {
r.Unlock()
return &NotRegisteredError{}
}
r.Unlock()
}
return r.manager.UnregisterReceiver(ctx, r)
}