/
create-topic.go
97 lines (82 loc) · 2.55 KB
/
create-topic.go
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// Copyright (c) 2021 6 River Systems
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
package actions
import (
"context"
"errors"
"github.com/google/uuid"
"go.6river.tech/mmmbbb/ent"
"go.6river.tech/mmmbbb/ent/topic"
)
type CreateTopicParams struct {
Name string
Labels map[string]string
}
type createTopicResults struct {
ID uuid.UUID
}
type CreateTopic struct {
actionBase[CreateTopicParams, createTopicResults]
}
var _ Action[CreateTopicParams, createTopicResults] = (*CreateTopic)(nil)
func NewCreateTopic(params CreateTopicParams) *CreateTopic {
if params.Name == "" {
panic(errors.New("Topic must have a non-empty name"))
}
return &CreateTopic{
actionBase[CreateTopicParams, createTopicResults]{
params: params,
},
}
}
var createTopicsCounter, createTopicsHistogram = actionMetrics("create_topic", "topics", "created")
func (a *CreateTopic) Execute(ctx context.Context, tx *ent.Tx) error {
timer := startActionTimer(createTopicsHistogram, tx)
defer timer.Ended()
exists, err := tx.Topic.Query().
Where(
topic.Name(a.params.Name),
topic.DeletedAtIsNil(),
).
Exist(ctx)
if err != nil {
return err
}
if exists {
return ErrExists
}
t, err := tx.Topic.Create().
SetName(a.params.Name).
SetLabels(a.params.Labels).
SetLive(true).
Save(ctx)
if err != nil {
// in case two creates raced
if isSqlDuplicateKeyError(err) {
return ErrExists
}
return err
}
NotifyModifyTopic(tx, t.ID, t.Name)
a.results = &createTopicResults{
ID: t.ID,
}
timer.Succeeded(func() { createTopicsCounter.Inc() })
return nil
}