add mock container source, rename docker source

mocksource.go

@@ -0,0 +1,134 @@
+package main
+
+import (
+	"math/rand"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/bcicen/ctop/metrics"
+	"github.com/jgautheron/codename-generator"
+	"github.com/nu7hatch/gouuid"
+)
+
+type MockContainerSource struct {
+	containers Containers
+	collectors map[string]metrics.Collector
+}
+
+func NewMockContainerSource() *MockContainerSource {
+	cs := &MockContainerSource{
+		collectors: make(map[string]metrics.Collector),
+	}
+	cs.Init()
+	go cs.Loop()
+	return cs
+}
+
+// Create Mock containers
+func (cs *MockContainerSource) Init() {
+	total := 10
+	rand.Seed(int64(time.Now().Nanosecond()))
+
+	for i := 0; i < total; i++ {
+		c := NewContainer(makeID(), makeName())
+		lock.Lock()
+		cs.containers = append(cs.containers, c)
+		lock.Unlock()
+		cs.collectors[c.id] = metrics.NewMock()
+
+		c.SetState(makeState())
+	}
+
+}
+
+func (cs *MockContainerSource) Loop() {
+	iter := 0
+	for {
+		for _, c := range cs.containers {
+			// Change state for random container
+			if iter%5 == 0 {
+				randC := cs.containers[rand.Intn(len(cs.containers))]
+				randC.SetState(makeState())
+			}
+
+			isCollecting := cs.collectors[c.id].Running()
+			//log.Infof("id=%s state=%s collector=%t", c.id, c.state, isCollecting)
+
+			// start collector if needed
+			if c.state == "running" && !isCollecting {
+				cs.collectors[c.id].Start()
+				c.Read(cs.collectors[c.id].Stream())
+			}
+			// stop collector if needed
+			if c.state != "running" && isCollecting {
+				cs.collectors[c.id].Stop()
+			}
+
+		}
+		iter++
+		time.Sleep(3 * time.Second)
+	}
+}
+
+// Get a single container, by ID
+func (cs *MockContainerSource) Get(id string) (*Container, bool) {
+	for _, c := range cs.containers {
+		if c.id == id {
+			return c, true
+		}
+	}
+	return nil, false
+}
+
+// Remove containers by ID
+func (cs *MockContainerSource) delByID(id string) {
+	for n, c := range cs.containers {
+		if c.id == id {
+			cs.del(n)
+			return
+		}
+	}
+}
+
+// Remove one or more containers by index
+func (cs *MockContainerSource) del(idx ...int) {
+	lock.Lock()
+	defer lock.Unlock()
+	for _, i := range idx {
+		cs.containers = append(cs.containers[:i], cs.containers[i+1:]...)
+	}
+	log.Infof("removed %d dead containers", len(idx))
+}
+
+// Return array of all containers, sorted by field
+func (cs *MockContainerSource) All() []*Container {
+	sort.Sort(cs.containers)
+	return cs.containers
+}
+
+func makeID() string {
+	u, err := uuid.NewV4()
+	if err != nil {
+		panic(err)
+	}
+	return strings.Replace(u.String(), "-", "", -1)
+}
+
+func makeName() string {
+	n, err := codename.Get(codename.Sanitized)
+	if err != nil {
+		panic(err)
+	}
+	return strings.Replace(n, "-", "_", -1)
+}
+
+func makeState() string {
+	switch rand.Intn(10) {
+	case 0, 1, 2:
+		return "exited"
+	case 3:
+		return "paused"
+	}
+	return "running"
+}