本文整理匯總了Golang中github.com/portworx/kvdb.Kvdb.Update方法的典型用法代碼示例。如果您正苦於以下問題：Golang Kvdb.Update方法的具體用法？Golang Kvdb.Update怎麽用？Golang Kvdb.Update使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類github.com/portworx/kvdb.Kvdb的用法示例。
在下文中一共展示了Kvdb.Update方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Golang代碼示例。
示例1: update
func update(kv kvdb.Kvdb, t *testing.T) {
fmt.Println("update")
key := "update/foo"
kv.Delete(key)
kvp, err := kv.Update(key, []byte("bar"), 0)
assert.Error(t, err, "Update should error on non-existent key")
defer func() {
kv.Delete(key)
}()
kvp, err = kv.Create(key, []byte("bar"), 0)
assert.NoError(t, err, "Unexpected error on create")
kvp, err = kv.Update(key, []byte("bar"), 0)
assert.NoError(t, err, "Unexpected error on update")
assert.Equal(t, kvp.Action, kvdb.KVSet,
"Expected action KVSet, actual %v", kvp.Action)
}示例2: collect
func collect(kv kvdb.Kvdb, t *testing.T) {
fmt.Println("collect")
root := "pwx/test/collect"
firstLevel := root + "/first"
secondLevel := root + "/second"
kv.DeleteTree(root)
kvp, _ := kv.Create(firstLevel, []byte("bar"), 0)
fmt.Printf("KVP is %v", kvp)
collector, _ := kvdb.NewUpdatesCollector(kv, secondLevel, kvp.CreatedIndex)
time.Sleep(time.Second)
var updates []*kvdb.KVPair
updateFn := func(start, end int) uint64 {
maxVersion := uint64(0)
for i := start; i < end; i++ {
newLeaf := strconv.Itoa(i)
kvp1, _ := kv.Create(secondLevel+"/"+newLeaf, []byte(newLeaf), 0)
kvp2, _ := kv.Update(firstLevel, []byte(newLeaf), 0)
updates = append(updates, kvp1)
maxVersion = kvp2.ModifiedIndex
}
return maxVersion
}
updateFn(0, 10)
// Allow watch updates to come back.
time.Sleep(time.Millisecond * 500)
collector.Stop()
updateFn(10, 20)
lastKVIndex := kvp.CreatedIndex
lastLeafIndex := -1
cb := func(prefix string, opaque interface{}, kvp *kvdb.KVPair,
err error) error {
assert.True(t, err == nil, "Error is nil %v", err)
assert.True(t, kvp.ModifiedIndex > lastKVIndex,
"Modified index %v lower than last index %v",
kvp.ModifiedIndex, lastKVIndex)
lastKVIndex = kvp.ModifiedIndex
strValue := string(kvp.Value)
value := secondLevel + "/" + strValue
assert.True(t, strings.Compare(kvp.Key, value) == 0,
"Key: %v, Value: %v", kvp.Key, value)
leafIndex, _ := strconv.Atoi(strValue)
assert.True(t, leafIndex == lastLeafIndex+1,
"Last leaf: %v, leaf: %v", kvp.Key,
value)
lastLeafIndex = leafIndex
return nil
}
replayCb := make([]kvdb.ReplayCb, 1)
replayCb[0].Prefix = secondLevel
replayCb[0].WatchCB = cb
_, err := collector.ReplayUpdates(replayCb)
assert.True(t, err == nil, "Replay encountered error %v", err)
assert.True(t, lastLeafIndex == 9, "Last leaf index %v, expected : 9",
lastLeafIndex)
// Test with no updates.
thirdLevel := root + "/third"
kvp, _ = kv.Create(thirdLevel, []byte("bar_update"), 0)
collector, _ = kvdb.NewUpdatesCollector(kv, thirdLevel, kvp.ModifiedIndex)
time.Sleep(2 * time.Second)
_, err = collector.ReplayUpdates(replayCb)
assert.True(t, err == nil, "Replay encountered error %v", err)
assert.True(t, lastLeafIndex == 9, "Last leaf index %v, expected : 9",
lastLeafIndex)
// Test with kvdb returning error because update index was too old.
fourthLevel := root + "/fourth"
kv.Create(fourthLevel, []byte(strconv.Itoa(0)), 0)
for i := 1; i < 2000; i++ {
kv.Update(fourthLevel, []byte(strconv.Itoa(i)), 0)
}
collector, _ = kvdb.NewUpdatesCollector(kv, fourthLevel, kvp.ModifiedIndex)
kv.Update(fourthLevel, []byte(strconv.Itoa(2000)), 0)
time.Sleep(500 * time.Millisecond)
cb = func(prefix string, opaque interface{}, kvp *kvdb.KVPair,
err error) error {
fmt.Printf("Error is %v", err)
assert.True(t, err != nil, "Error is nil %v", err)
return nil
}
replayCb[0].WatchCB = cb
collector.ReplayUpdates(replayCb)
}