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hello_getandtouch.go
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hello_getandtouch.go
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package main
import (
"flag"
"fmt"
"log"
"time"
"github.com/adamliesko/go-couchbase"
)
var poolName = flag.String("pool", "default", "Pool name")
var writeFlag = flag.Bool("write", false, "If true, will write a value to the key")
func main() {
flag.Parse()
if len(flag.Args()) < 3 {
log.Fatalf("Usage: hello_getandtouch [-pool poolname] [-write] server bucket key")
}
c, err := couchbase.Connect(flag.Arg(0))
if err != nil {
log.Fatalf("Error connecting: %v", err)
}
fmt.Printf("Connected to ver=%s\n", c.Info.ImplementationVersion)
pool, err := c.GetPool(*poolName)
if err != nil {
log.Fatalf("Can't get pool %q: %v", *poolName, err)
}
bucket, err := pool.GetBucket(flag.Arg(1))
if err != nil {
log.Fatalf("Can't get bucket %q: %v", flag.Arg(1), err)
}
key := flag.Arg(2)
// Write an initial value to the key, with expiry 2s
if err = bucket.Set(key, 2, []string{"a", "b", "c"}); err != nil {
log.Fatalf("Set returned error %v", err)
}
// Validate that expiry is extended when getAndTouch is called
for i := 0; i < 10; i++ {
result, _, err := bucket.GetAndTouchRaw(key, 3)
if err != nil {
log.Fatalf("GetAndTouchRaw returned error %v", err)
}
if len(result) == 0 {
log.Fatalf("GetAndTouchRaw returned invalid content", err)
}
log.Printf("Successful retrieval via GetAndTouchRaw after %ds", i+1)
time.Sleep(1 * time.Second)
}
// Validate failed retrieval post-expiry. Use GetAndTouchRaw to shorten expiry,
// then attempt standard retrieval via GetRaw
bucket.GetAndTouchRaw(key, 1)
time.Sleep(2 * time.Second)
_, err = bucket.GetRaw(key)
if err == nil {
log.Fatalf("Retrieved document that should have expired")
}
}