commit f04111c68921a3c1c3083ab4a0995f30f1fe529b
Author: derfenix <derfenix@gmail.com>
Date:   Thu May 30 19:42:26 2024 +0300

    Initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0d6503d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+*~
+.fuse_hidden*
+.directory
+.Trash-*
+.nfs*
+.idea
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..5d985ec
--- /dev/null
+++ b/README.md
@@ -0,0 +1,13 @@
+# ТЗ
+
+Реализовать модель обработки данных в виде пайплайна, состоящего из следующих этапов
+1. Подача на вход пакетов данных. Пакет данных = слайс случайных целых чисел из 10 элементов. Новый пакет подается каждые N мс (N задается в виде env переменной)
+2. Обработка пакетов: нахождение 3-х наибольших чисел в пакете. Вход: слайс int из 10 элементов, выход: слайс из 3-х элементов. Обработка пакетов должна производиться M воркерами (M задается в виде env переменной)
+3. Аккумулятор: суммирование чисел обработанных пакетов, полученных на предыдущем этапе, и запись в единую переменную int
+4. Публикатор: вывод на консоль текущего значения аккумулятора каждые K секунд (K задается в виде env переменной)
+
+Пример:
+вход: {1, 9, 6, 4, 4, 5, 7, 8, 0, 1}
+обработка: {9, 7, 8}
+аккумулятор: 9+7+8=24
+публикатор: 24
diff --git a/accumulator/accumulator.go b/accumulator/accumulator.go
new file mode 100644
index 0000000..56547c9
--- /dev/null
+++ b/accumulator/accumulator.go
@@ -0,0 +1,40 @@
+package accumulator
+
+import (
+	"context"
+	"sync"
+	"sync/atomic"
+)
+
+func NewAccumulator(in <-chan [3]int) *Accumulator {
+	return &Accumulator{in: in}
+}
+
+type Accumulator struct {
+	in   <-chan [3]int
+	summ atomic.Int64
+}
+
+func (a *Accumulator) Start(ctx context.Context, wg *sync.WaitGroup) {
+	defer wg.Done()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+
+		case m, ok := <-a.in:
+			if !ok {
+				return
+			}
+
+			for _, value := range m {
+				a.summ.Add(int64(value))
+			}
+		}
+	}
+}
+
+func (a *Accumulator) Res() int64 {
+	return a.summ.Load()
+}
diff --git a/adapters/randomsource/service.go b/adapters/randomsource/service.go
new file mode 100644
index 0000000..1123068
--- /dev/null
+++ b/adapters/randomsource/service.go
@@ -0,0 +1,58 @@
+package randomsource
+
+import (
+	"context"
+	crand "crypto/rand"
+	"io"
+	"math/big"
+	"sync"
+	"time"
+)
+
+func NewService(ch chan [10]int, interval time.Duration, maxInt int64) *Service {
+	return &Service{
+		interval: interval,
+		ch:       ch,
+		rand:     crand.Reader,
+		maxInt:   maxInt,
+	}
+}
+
+type Service struct {
+	interval time.Duration
+	rand     io.Reader
+	ch       chan [10]int
+	maxInt   int64
+}
+
+func (s *Service) SourceCh() <-chan [10]int {
+	return s.ch
+}
+
+func (s *Service) Start(ctx context.Context, wg *sync.WaitGroup) {
+	defer wg.Done()
+
+	var res [10]int
+
+	ticker := time.NewTicker(s.interval)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+
+		case <-ticker.C:
+			for i := 0; i < 10; i++ {
+				v, err := crand.Int(s.rand, big.NewInt(s.maxInt))
+				if err != nil {
+					panic(err)
+				}
+
+				res[i] = int(v.Int64())
+			}
+
+			s.ch <- res
+		}
+	}
+}
diff --git a/adapters/stdoutpub/service.go b/adapters/stdoutpub/service.go
new file mode 100644
index 0000000..bc63aed
--- /dev/null
+++ b/adapters/stdoutpub/service.go
@@ -0,0 +1,26 @@
+package stdoutpub
+
+import (
+	"fmt"
+	"os"
+)
+
+const outPrefix = "Result: "
+
+func NewService() Service {
+	return Service{
+		fd: os.Stdout,
+	}
+}
+
+type Service struct {
+	fd *os.File
+}
+
+func (s Service) Publish(i int64) error {
+	if _, err := fmt.Fprintf(s.fd, "%s%d\n", outPrefix, i); err != nil {
+		return fmt.Errorf("write to file: %w", err)
+	}
+
+	return nil
+}
diff --git a/application/application.go b/application/application.go
new file mode 100644
index 0000000..cda82dd
--- /dev/null
+++ b/application/application.go
@@ -0,0 +1,93 @@
+package application
+
+import (
+	"context"
+	"fmt"
+	"sync"
+	"time"
+
+	"marketlab/accumulator"
+	"marketlab/adapters/randomsource"
+	"marketlab/adapters/stdoutpub"
+	"marketlab/worker"
+
+	"go.uber.org/zap"
+)
+
+type Source interface {
+	Start(ctx context.Context, wg *sync.WaitGroup)
+	SourceCh() <-chan [10]int
+}
+
+type Publisher interface {
+	Publish(int64) error
+}
+
+func NewApplication(ctx context.Context) (Application, error) {
+	cfg, err := NewConfig(ctx)
+	if err != nil {
+		return Application{}, fmt.Errorf("create config: %w", err)
+	}
+
+	logger, err := zap.NewDevelopment()
+	if err != nil {
+		return Application{}, fmt.Errorf("create logger: %w", err)
+	}
+
+	in := make(chan [10]int, cfg.WorkersCount)
+
+	pool := worker.NewPool(in, cfg.WorkersCount, logger.Named("pool"))
+
+	acc := accumulator.NewAccumulator(pool.Out())
+
+	src := randomsource.NewService(in, cfg.PacketInputInterval, 100)
+
+	pub := stdoutpub.NewService()
+
+	return Application{
+		Logger:      logger,
+		Cfg:         cfg,
+		Source:      src,
+		Pool:        pool,
+		Accumulator: acc,
+		Publisher:   pub,
+	}, nil
+}
+
+type Application struct {
+	Logger      *zap.Logger
+	Cfg         Config
+	Source      Source
+	Pool        *worker.Pool
+	Accumulator *accumulator.Accumulator
+	Publisher   Publisher
+}
+
+func (a *Application) Start(ctx context.Context, wg *sync.WaitGroup) error {
+	wg.Add(4)
+
+	go a.Source.Start(ctx, wg)
+	go a.Accumulator.Start(ctx, wg)
+	go a.Pool.Start(ctx, wg)
+
+	go func() {
+		wg.Done()
+
+		ticker := time.NewTicker(a.Cfg.OutputInterval)
+		defer ticker.Stop()
+
+		for {
+			select {
+			case <-ctx.Done():
+				return
+
+			case <-ticker.C:
+				if err := a.Publisher.Publish(a.Accumulator.Res()); err != nil {
+					a.Logger.Error("failed to publish result", zap.Error(err))
+				}
+			}
+		}
+	}()
+
+	return nil
+}
diff --git a/application/config.go b/application/config.go
new file mode 100644
index 0000000..b5952c4
--- /dev/null
+++ b/application/config.go
@@ -0,0 +1,25 @@
+package application
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/sethvargo/go-envconfig"
+)
+
+type Config struct {
+	PacketInputInterval time.Duration `env:"PACKET_INPUT_INTERVAL,default=500ms"`
+	WorkersCount        uint          `env:"WORKERS_COUNT,default=10"`
+	OutputInterval      time.Duration `env:"OUTPUT_INTERVAL,default=1s"`
+}
+
+func NewConfig(ctx context.Context) (Config, error) {
+	var cfg Config
+
+	if err := envconfig.Process(ctx, &cfg); err != nil {
+		return Config{}, fmt.Errorf("failed to process env vars: %w", err)
+	}
+
+	return cfg, nil
+}
diff --git a/cmd/service/main.go b/cmd/service/main.go
new file mode 100644
index 0000000..d368163
--- /dev/null
+++ b/cmd/service/main.go
@@ -0,0 +1,30 @@
+package main
+
+import (
+	"context"
+	"os/signal"
+	"sync"
+	"syscall"
+
+	"marketlab/application"
+
+	"go.uber.org/zap"
+)
+
+func main() {
+	ctx, cancel := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer cancel()
+
+	app, err := application.NewApplication(ctx)
+	if err != nil {
+		panic(err)
+	}
+
+	wg := &sync.WaitGroup{}
+	if err := app.Start(ctx, wg); err != nil {
+		app.Logger.Fatal("startup", zap.Error(err))
+	}
+
+	wg.Wait()
+
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..9f87629
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,10 @@
+module marketlab
+
+go 1.22
+
+require (
+	github.com/sethvargo/go-envconfig v1.0.3
+	go.uber.org/zap v1.27.0
+)
+
+require go.uber.org/multierr v1.10.0 // indirect
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..2f6493a
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,18 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sethvargo/go-envconfig v1.0.3 h1:ZDxFGT1M7RPX0wgDOCdZMidrEB+NrayYr6fL0/+pk4I=
+github.com/sethvargo/go-envconfig v1.0.3/go.mod h1:JLd0KFWQYzyENqnEPWWZ49i4vzZo/6nRidxI8YvGiHw=
+github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
+github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
+go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
+go.uber.org/multierr v1.10.0 h1:S0h4aNzvfcFsC3dRF1jLoaov7oRaKqRGC/pUEJ2yvPQ=
+go.uber.org/multierr v1.10.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
+go.uber.org/zap v1.27.0 h1:aJMhYGrd5QSmlpLMr2MftRKl7t8J8PTZPA732ud/XR8=
+go.uber.org/zap v1.27.0/go.mod h1:GB2qFLM7cTU87MWRP2mPIjqfIDnGu+VIO4V/SdhGo2E=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/worker/pool.go b/worker/pool.go
new file mode 100644
index 0000000..32fdd20
--- /dev/null
+++ b/worker/pool.go
@@ -0,0 +1,42 @@
+package worker
+
+import (
+	"context"
+	"fmt"
+	"sync"
+
+	"go.uber.org/zap"
+)
+
+func NewPool(in <-chan [10]int, workersNum uint, log *zap.Logger) *Pool {
+	out := make(chan [3]int, workersNum)
+
+	return &Pool{
+		in:         in,
+		out:        out,
+		workersNum: int(workersNum),
+		log:        log,
+	}
+}
+
+type Pool struct {
+	in  <-chan [10]int
+	out chan [3]int
+
+	workersNum int
+	log        *zap.Logger
+}
+
+func (p *Pool) Start(ctx context.Context, wg *sync.WaitGroup) {
+	defer wg.Done()
+
+	wg.Add(p.workersNum)
+
+	for i := 0; i < p.workersNum; i++ {
+		go NewWorker(p.in, p.out, p.log.Named(fmt.Sprintf("worker_%d", i))).Start(ctx, wg)
+	}
+}
+
+func (p *Pool) Out() <-chan [3]int {
+	return p.out
+}
diff --git a/worker/worker.go b/worker/worker.go
new file mode 100644
index 0000000..e64e927
--- /dev/null
+++ b/worker/worker.go
@@ -0,0 +1,51 @@
+package worker
+
+import (
+	"context"
+	"sort"
+	"sync"
+
+	"go.uber.org/zap"
+)
+
+func NewWorker(in <-chan [10]int, out chan<- [3]int, log *zap.Logger) *Worker {
+	return &Worker{
+		in:  in,
+		out: out,
+		log: log,
+	}
+}
+
+type Worker struct {
+	in  <-chan [10]int
+	out chan<- [3]int
+	log *zap.Logger
+}
+
+func (w *Worker) Start(ctx context.Context, wg *sync.WaitGroup) {
+	defer wg.Done()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+
+		case m, ok := <-w.in:
+			if !ok {
+				return
+			}
+
+			w.out <- w.findMax(m)
+		}
+	}
+}
+
+func (w *Worker) findMax(input [10]int) [3]int {
+	sort.Ints(input[:])
+
+	res := [3]int(input[7:])
+
+	w.log.Debug("new data", zap.Ints("input", input[:]), zap.Ints("output", res[:]))
+
+	return res
+}
diff --git a/worker/worker_test.go b/worker/worker_test.go
new file mode 100644
index 0000000..9e9eb96
--- /dev/null
+++ b/worker/worker_test.go
@@ -0,0 +1,43 @@
+package worker
+
+import (
+	"reflect"
+	"strconv"
+	"testing"
+)
+
+func TestWorker_findMax(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		in  [10]int
+		out [3]int
+	}{
+		{
+			in:  [10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
+			out: [3]int{8, 9, 10},
+		},
+		{
+			in:  [10]int{10, 9, 8, 7, 6, 5, 4, 3, 2, 1},
+			out: [3]int{8, 9, 10},
+		},
+		{
+			in:  [10]int{9, 7, 6, 10, 5, 4, 3, 8, 1},
+			out: [3]int{8, 9, 10},
+		},
+	}
+
+	for idx, tt := range tests {
+		tt := tt
+
+		t.Run(strconv.Itoa(idx), func(t *testing.T) {
+			t.Parallel()
+
+			w := &Worker{}
+
+			if got := w.findMax(tt.in); !reflect.DeepEqual(got, tt.out) {
+				t.Errorf("findMax() = %v, want %v", got, tt.out)
+			}
+		})
+	}
+}