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persister.go
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/
persister.go
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// Copyright 2024 The Bucketeer Authors.
//
// 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 persister
import (
"context"
"time"
"go.uber.org/zap"
kingpin "gopkg.in/alecthomas/kingpin.v2"
"github.com/bucketeer-io/bucketeer/pkg/cli"
"github.com/bucketeer-io/bucketeer/pkg/health"
"github.com/bucketeer-io/bucketeer/pkg/metrics"
"github.com/bucketeer-io/bucketeer/pkg/pubsub"
"github.com/bucketeer-io/bucketeer/pkg/pubsub/puller"
"github.com/bucketeer-io/bucketeer/pkg/rpc"
"github.com/bucketeer-io/bucketeer/pkg/storage/v2/mysql"
pst "github.com/bucketeer-io/bucketeer/pkg/user/persister"
)
const command = "persister"
type Persister interface {
Run(context.Context, metrics.Metrics, *zap.Logger) error
}
type persister struct {
*kingpin.CmdClause
port *int
project *string
mysqlUser *string
mysqlPass *string
mysqlHost *string
mysqlPort *int
mysqlDBName *string
subscription *string
maxMPS *int
numWorkers *int
topic *string
flushSize *int
flushInterval *time.Duration
publishNumGoroutines *int
publishTimeout *time.Duration
certPath *string
keyPath *string
pullerNumGoroutines *int
pullerMaxExtension *time.Duration
pullerMaxOutstandingMessages *int
pullerMaxOutstandingBytes *int
}
func RegisterCommand(r cli.CommandRegistry, p cli.ParentCommand) cli.Command {
cmd := p.Command(command, "Start user persister")
persister := &persister{
CmdClause: cmd,
port: cmd.Flag("port", "Port to bind to.").Default("9090").Int(),
project: cmd.Flag("project", "Google Cloud project name.").String(),
mysqlUser: cmd.Flag("mysql-user", "MySQL user.").Required().String(),
mysqlPass: cmd.Flag("mysql-pass", "MySQL password.").Required().String(),
mysqlHost: cmd.Flag("mysql-host", "MySQL host.").Required().String(),
mysqlPort: cmd.Flag("mysql-port", "MySQL port.").Required().Int(),
mysqlDBName: cmd.Flag("mysql-db-name", "MySQL database name.").Required().String(),
subscription: cmd.Flag("subscription", "Google PubSub subscription name.").Required().String(),
topic: cmd.Flag("topic", "Google PubSub topic name.").Required().String(),
maxMPS: cmd.Flag("max-mps", "Maximum messages should be handled in a second.").Default("1000").Int(),
numWorkers: cmd.Flag("num-workers", "Number of workers.").Default("2").Int(),
flushSize: cmd.Flag("flush-size", "Maximum number of messages in one flush.").Default("100").Int(),
flushInterval: cmd.Flag("flush-interval", "Maximum interval between two flushes.").Default("2s").Duration(),
publishNumGoroutines: cmd.Flag(
"publish-num-goroutines",
"The number of goroutines for publishing.",
).Default("0").Int(),
publishTimeout: cmd.Flag(
"publish-timeout",
"The maximum time to publish a bundle of messages.",
).Default("1m").Duration(),
certPath: cmd.Flag("cert", "Path to TLS certificate.").Required().String(),
keyPath: cmd.Flag("key", "Path to TLS key.").Required().String(),
pullerNumGoroutines: cmd.Flag(
"puller-num-goroutines",
"Number of goroutines will be spawned to pull messages.",
).Int(),
pullerMaxExtension: cmd.Flag(
"puller-max-extension",
"Maximum duration in seconds until a message expires.",
).Default("600s").Duration(),
pullerMaxOutstandingMessages: cmd.Flag(
"puller-max-outstanding-messages",
"Maximum number of unprocessed messages.",
).Int(),
pullerMaxOutstandingBytes: cmd.Flag("puller-max-outstanding-bytes", "Maximum size of unprocessed messages.").Int(),
}
r.RegisterCommand(persister)
return persister
}
func (p *persister) Run(ctx context.Context, metrics metrics.Metrics, logger *zap.Logger) error {
registerer := metrics.DefaultRegisterer()
mysqlClient, err := p.createMySQLClient(ctx, registerer, logger)
if err != nil {
return err
}
defer mysqlClient.Close()
puller, err := p.createPuller(ctx, logger)
if err != nil {
return err
}
persister := pst.NewPersister(
mysqlClient,
puller,
pst.WithMaxMPS(*p.maxMPS),
pst.WithNumWorkers(*p.numWorkers),
pst.WithFlushSize(*p.flushSize),
pst.WithFlushInterval(*p.flushInterval),
pst.WithMetrics(registerer),
pst.WithLogger(logger),
)
defer persister.Stop()
go persister.Run() // nolint:errcheck
healthChecker := health.NewGrpcChecker(
health.WithTimeout(time.Second),
health.WithCheck("metrics", metrics.Check),
health.WithCheck("persister", persister.Check),
)
go healthChecker.Run(ctx)
server := rpc.NewServer(healthChecker, *p.certPath, *p.keyPath,
"user-persister",
rpc.WithPort(*p.port),
rpc.WithMetrics(registerer),
rpc.WithLogger(logger),
rpc.WithHandler("/health", healthChecker),
)
defer server.Stop(10 * time.Second)
go server.Run()
// Ensure to stop the health check before stopping the application
// so the Kubernetes Readiness can detect it faster and remove the pod
// from the service load balancer.
defer healthChecker.Stop()
<-ctx.Done()
return nil
}
func (p *persister) createMySQLClient(
ctx context.Context,
registerer metrics.Registerer,
logger *zap.Logger,
) (mysql.Client, error) {
ctx, cancel := context.WithTimeout(ctx, 10*time.Second)
defer cancel()
return mysql.NewClient(
ctx,
*p.mysqlUser, *p.mysqlPass, *p.mysqlHost,
*p.mysqlPort,
*p.mysqlDBName,
mysql.WithLogger(logger),
mysql.WithMetrics(registerer),
)
}
func (p *persister) createPuller(ctx context.Context, logger *zap.Logger) (puller.Puller, error) {
ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
client, err := pubsub.NewClient(ctx, *p.project, pubsub.WithLogger(logger))
if err != nil {
return nil, err
}
return client.CreatePuller(*p.subscription, *p.topic,
pubsub.WithNumGoroutines(*p.pullerNumGoroutines),
pubsub.WithMaxExtension(*p.pullerMaxExtension),
pubsub.WithMaxOutstandingMessages(*p.pullerMaxOutstandingMessages),
pubsub.WithMaxOutstandingBytes(*p.pullerMaxOutstandingBytes),
)
}