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Publish/Subscribe with context

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This commit is contained in:
Asim
2015-05-23 23:16:26 +01:00
parent b5dcbbe998
commit 32928bfb67
4 changed files with 71 additions and 26 deletions
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14
examples/pub_sub.go
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@@ -7,6 +7,9 @@ import (
log "github.com/golang/glog"
"github.com/myodc/go-micro/broker"
"github.com/myodc/go-micro/cmd"
c "github.com/myodc/go-micro/context"
"golang.org/x/net/context"
)
var (
@@ -17,8 +20,12 @@ func pub() {
tick := time.NewTicker(time.Second)
i := 0
for _ = range tick.C {
ctx := c.WithMetaData(context.Background(), map[string]string{
"id": fmt.Sprintf("%d", i),
})
msg := fmt.Sprintf("%d: %s", i, time.Now().String())
if err := broker.Publish(topic, []byte(msg)); err != nil {
if err := broker.Publish(ctx, topic, []byte(msg)); err != nil {
log.Errorf("[pub] failed: %v", err)
} else {
fmt.Println("[pub] pubbed message:", msg)
@@ -28,8 +35,9 @@ func pub() {
}
func sub() {
_, err := broker.Subscribe(topic, func(msg *broker.Message) {
fmt.Println("[sub] received message:", string(msg.Data))
_, err := broker.Subscribe(topic, func(ctx context.Context, msg *broker.Message) {
md, _ := c.GetMetaData(ctx)
fmt.Println("[sub] received message:", string(msg.Body), "context", md)
})
if err != nil {
fmt.Println(err)