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package logger // import "github.com/docker/docker/daemon/logger"
import (
"context"
"strconv"
"testing"
"time"
)
type mockLogger struct{ c chan *Message }
func (l *mockLogger) Log(msg *Message) error {
l.c <- msg
return nil
}
func (l *mockLogger) Name() string {
return "mock"
}
func (l *mockLogger) Close() error {
return nil
}
func TestRingLogger(t *testing.T) {
mockLog := &mockLogger{make(chan *Message)} // no buffer on this channel
ring := newRingLogger(mockLog, Info{}, 1)
defer ring.setClosed()
// this should never block
ring.Log(&Message{Line: []byte("1")})
ring.Log(&Message{Line: []byte("2")})
ring.Log(&Message{Line: []byte("3")})
select {
case msg := <-mockLog.c:
if string(msg.Line) != "1" {
t.Fatalf("got unexpected msg: %q", string(msg.Line))
}
case <-time.After(100 * time.Millisecond):
t.Fatal("timeout reading log message")
}
select {
case msg := <-mockLog.c:
t.Fatalf("expected no more messages in the queue, got: %q", string(msg.Line))
default:
}
}
func TestRingCap(t *testing.T) {
r := newRing(5)
for i := 0; i < 10; i++ {
// queue messages with "0" to "10"
// the "5" to "10" messages should be dropped since we only allow 5 bytes in the buffer
if err := r.Enqueue(&Message{Line: []byte(strconv.Itoa(i))}); err != nil {
t.Fatal(err)
}
}
// should have messages in the queue for "0" to "4"
for i := 0; i < 5; i++ {
m, err := r.Dequeue()
if err != nil {
t.Fatal(err)
}
if string(m.Line) != strconv.Itoa(i) {
t.Fatalf("got unexpected message for iter %d: %s", i, string(m.Line))
}
}
// queue a message that's bigger than the buffer cap
if err := r.Enqueue(&Message{Line: []byte("hello world")}); err != nil {
t.Fatal(err)
}
// queue another message that's bigger than the buffer cap
if err := r.Enqueue(&Message{Line: []byte("eat a banana")}); err != nil {
t.Fatal(err)
}
m, err := r.Dequeue()
if err != nil {
t.Fatal(err)
}
if string(m.Line) != "hello world" {
t.Fatalf("got unexpected message: %s", string(m.Line))
}
if len(r.queue) != 0 {
t.Fatalf("expected queue to be empty, got: %d", len(r.queue))
}
}
func TestRingClose(t *testing.T) {
r := newRing(1)
if err := r.Enqueue(&Message{Line: []byte("hello")}); err != nil {
t.Fatal(err)
}
r.Close()
if err := r.Enqueue(&Message{}); err != errClosed {
t.Fatalf("expected errClosed, got: %v", err)
}
if len(r.queue) != 1 {
t.Fatal("expected empty queue")
}
if m, err := r.Dequeue(); err == nil || m != nil {
t.Fatal("expected err on Dequeue after close")
}
ls := r.Drain()
if len(ls) != 1 {
t.Fatalf("expected one message: %v", ls)
}
if string(ls[0].Line) != "hello" {
t.Fatalf("got unexpected message: %s", string(ls[0].Line))
}
}
func TestRingDrain(t *testing.T) {
r := newRing(5)
for i := 0; i < 5; i++ {
if err := r.Enqueue(&Message{Line: []byte(strconv.Itoa(i))}); err != nil {
t.Fatal(err)
}
}
ls := r.Drain()
if len(ls) != 5 {
t.Fatal("got unexpected length after drain")
}
for i := 0; i < 5; i++ {
if string(ls[i].Line) != strconv.Itoa(i) {
t.Fatalf("got unexpected message at position %d: %s", i, string(ls[i].Line))
}
}
if r.sizeBytes != 0 {
t.Fatalf("expected buffer size to be 0 after drain, got: %d", r.sizeBytes)
}
ls = r.Drain()
if len(ls) != 0 {
t.Fatalf("expected 0 messages on 2nd drain: %v", ls)
}
}
type nopLogger struct{}
func (nopLogger) Name() string { return "nopLogger" }
func (nopLogger) Close() error { return nil }
func (nopLogger) Log(*Message) error { return nil }
func BenchmarkRingLoggerThroughputNoReceiver(b *testing.B) {
mockLog := &mockLogger{make(chan *Message)}
defer mockLog.Close()
l := NewRingLogger(mockLog, Info{}, -1)
msg := &Message{Line: []byte("hello humans and everyone else!")}
b.SetBytes(int64(len(msg.Line)))
for i := 0; i < b.N; i++ {
if err := l.Log(msg); err != nil {
b.Fatal(err)
}
}
}
func BenchmarkRingLoggerThroughputWithReceiverDelay0(b *testing.B) {
l := NewRingLogger(nopLogger{}, Info{}, -1)
msg := &Message{Line: []byte("hello humans and everyone else!")}
b.SetBytes(int64(len(msg.Line)))
for i := 0; i < b.N; i++ {
if err := l.Log(msg); err != nil {
b.Fatal(err)
}
}
}
func consumeWithDelay(delay time.Duration, c <-chan *Message) (cancel func()) {
started := make(chan struct{})
ctx, cancel := context.WithCancel(context.Background())
go func() {
close(started)
ticker := time.NewTicker(delay)
for range ticker.C {
select {
case <-ctx.Done():
ticker.Stop()
return
case <-c:
}
}
}()
<-started
return cancel
}
func BenchmarkRingLoggerThroughputConsumeDelay1(b *testing.B) {
mockLog := &mockLogger{make(chan *Message)}
defer mockLog.Close()
l := NewRingLogger(mockLog, Info{}, -1)
msg := &Message{Line: []byte("hello humans and everyone else!")}
b.SetBytes(int64(len(msg.Line)))
cancel := consumeWithDelay(1*time.Millisecond, mockLog.c)
defer cancel()
for i := 0; i < b.N; i++ {
if err := l.Log(msg); err != nil {
b.Fatal(err)
}
}
}
func BenchmarkRingLoggerThroughputConsumeDelay10(b *testing.B) {
mockLog := &mockLogger{make(chan *Message)}
defer mockLog.Close()
l := NewRingLogger(mockLog, Info{}, -1)
msg := &Message{Line: []byte("hello humans and everyone else!")}
b.SetBytes(int64(len(msg.Line)))
cancel := consumeWithDelay(10*time.Millisecond, mockLog.c)
defer cancel()
for i := 0; i < b.N; i++ {
if err := l.Log(msg); err != nil {
b.Fatal(err)
}
}
}
func BenchmarkRingLoggerThroughputConsumeDelay50(b *testing.B) {
mockLog := &mockLogger{make(chan *Message)}
defer mockLog.Close()
l := NewRingLogger(mockLog, Info{}, -1)
msg := &Message{Line: []byte("hello humans and everyone else!")}
b.SetBytes(int64(len(msg.Line)))
cancel := consumeWithDelay(50*time.Millisecond, mockLog.c)
defer cancel()
for i := 0; i < b.N; i++ {
if err := l.Log(msg); err != nil {
b.Fatal(err)
}
}
}
func BenchmarkRingLoggerThroughputConsumeDelay100(b *testing.B) {
mockLog := &mockLogger{make(chan *Message)}
defer mockLog.Close()
l := NewRingLogger(mockLog, Info{}, -1)
msg := &Message{Line: []byte("hello humans and everyone else!")}
b.SetBytes(int64(len(msg.Line)))
cancel := consumeWithDelay(100*time.Millisecond, mockLog.c)
defer cancel()
for i := 0; i < b.N; i++ {
if err := l.Log(msg); err != nil {
b.Fatal(err)
}
}
}
func BenchmarkRingLoggerThroughputConsumeDelay300(b *testing.B) {
mockLog := &mockLogger{make(chan *Message)}
defer mockLog.Close()
l := NewRingLogger(mockLog, Info{}, -1)
msg := &Message{Line: []byte("hello humans and everyone else!")}
b.SetBytes(int64(len(msg.Line)))
cancel := consumeWithDelay(300*time.Millisecond, mockLog.c)
defer cancel()
for i := 0; i < b.N; i++ {
if err := l.Log(msg); err != nil {
b.Fatal(err)
}
}
}
func BenchmarkRingLoggerThroughputConsumeDelay500(b *testing.B) {
mockLog := &mockLogger{make(chan *Message)}
defer mockLog.Close()
l := NewRingLogger(mockLog, Info{}, -1)
msg := &Message{Line: []byte("hello humans and everyone else!")}
b.SetBytes(int64(len(msg.Line)))
cancel := consumeWithDelay(500*time.Millisecond, mockLog.c)
defer cancel()
for i := 0; i < b.N; i++ {
if err := l.Log(msg); err != nil {
b.Fatal(err)
}
}
}
|
