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Merge pull request #164 from mattfont/add-KDS-pub-channel
Add Kinesis publisher channel type
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@@ -4,3 +4,4 @@ dist/ | |
| vendor/ | ||
| *~ | ||
| **/__debug_bin | ||
| .DS_Store | ||
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| @@ -0,0 +1,25 @@ | ||
| /* | ||
| * Copyright 2023 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. | ||
| * | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
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| package kdspub | ||
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| import "testing" | ||
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| func TestDocs(t *testing.T) { | ||
| (&KDSPubChan{}).DocSpec().Write("kdspub") | ||
| } |
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| @@ -0,0 +1,147 @@ | ||
| /* | ||
| * Copyright 2023 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. | ||
| * | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
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| package kdspub | ||
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| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
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| "github.com/Comcast/plax/dsl" | ||
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| "github.com/aws/aws-sdk-go-v2/aws" | ||
| "github.com/aws/aws-sdk-go-v2/config" | ||
| "github.com/aws/aws-sdk-go-v2/service/kinesis" | ||
| ) | ||
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| func init() { | ||
| dsl.TheChanRegistry.Register(dsl.NewCtx(nil), "kdspub", NewKDSPubChan) | ||
| } | ||
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| // KDSOpts is a configuration for a Kinesis consumer for a given | ||
| // stream. | ||
| type KDSOpts struct { | ||
| // StreamName is of course the name of the KDS. | ||
| StreamName string | ||
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| // BufferSize is the size of the underlying channel buffer. | ||
| // Defaults to DefaultChanBufferSize. | ||
| BufferSize int | ||
| } | ||
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| // KDSPubChan is a basic Kinesis stream consumer. | ||
| // | ||
| // This channel consumes messages from a Kinesis stream. | ||
| type KDSPubChan struct { | ||
| c chan dsl.Msg | ||
| ctl chan bool | ||
| svc *kinesis.Client | ||
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| opts *KDSOpts | ||
| } | ||
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| func (c *KDSPubChan) DocSpec() *dsl.DocSpec { | ||
| return &dsl.DocSpec{ | ||
| Chan: &KDSPubChan{}, | ||
| Opts: &KDSOpts{}, | ||
| } | ||
| } | ||
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| func NewKDSPubChan(ctx *dsl.Ctx, o interface{}) (dsl.Chan, error) { | ||
| js, err := json.Marshal(&o) | ||
| if err != nil { | ||
| return nil, dsl.NewBroken(err) | ||
| } | ||
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| opts := KDSOpts{ | ||
| BufferSize: dsl.DefaultChanBufferSize, | ||
| } | ||
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| if err = json.Unmarshal(js, &opts); err != nil { | ||
| return nil, dsl.NewBroken(err) | ||
| } | ||
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| return &KDSPubChan{ | ||
| c: make(chan dsl.Msg, opts.BufferSize), | ||
| ctl: make(chan bool), | ||
| opts: &opts, | ||
| }, nil | ||
| } | ||
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| func (c *KDSPubChan) Kind() dsl.ChanKind { | ||
| return "KDSPUB" | ||
| } | ||
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| func (c *KDSPubChan) Open(ctx *dsl.Ctx) error { | ||
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| cfg, err := config.LoadDefaultConfig(context.TODO()) | ||
| if err != nil { | ||
| ctx.Logf("Error opening KDS stream %s", c.opts.StreamName) | ||
| } | ||
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| c.svc = kinesis.NewFromConfig(cfg) | ||
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| go c.Pub(ctx, dsl.Msg{}) | ||
| return nil | ||
| } | ||
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| func (c *KDSPubChan) Close(ctx *dsl.Ctx) error { | ||
| return nil | ||
| } | ||
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| func (c *KDSPubChan) Sub(ctx *dsl.Ctx, topic string) error { | ||
| return dsl.Brokenf("Can't Sub on a KDS (%s)", c.opts.StreamName) | ||
| } | ||
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| func (c *KDSPubChan) Pub(ctx *dsl.Ctx, m dsl.Msg) error { | ||
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| ctx.Logf("Publishing to KDS %s", c.opts.StreamName) | ||
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| // Load the Shared AWS Configuration (~/.aws/config) | ||
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| input := &kinesis.PutRecordInput{ | ||
| Data: []byte(m.Payload), | ||
| StreamName: aws.String(c.opts.StreamName), | ||
| PartitionKey: aws.String("test"), | ||
| } | ||
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| _, err := c.svc.PutRecord(context.TODO(), input) | ||
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| if err != nil { | ||
| ctx.Warnf("warning: KDSPubChan.PUB %s", err) | ||
| } | ||
| return nil | ||
| } | ||
| func (c *KDSPubChan) Recv(ctx *dsl.Ctx) chan dsl.Msg { | ||
| ctx.Logf("KDSPubChan Recv()") | ||
| return c.c | ||
| } | ||
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| func (c *KDSPubChan) Kill(ctx *dsl.Ctx) error { | ||
| return fmt.Errorf("Kill is not supported by a %T", c) | ||
| } | ||
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| func (c *KDSPubChan) To(ctx *dsl.Ctx, m dsl.Msg) error { | ||
| ctx.Logf("KDSPubChan To %s", m.Topic) | ||
| select { | ||
| case <-ctx.Done(): | ||
| case c.c <- m: | ||
| } | ||
| return nil | ||
| } |
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