本文整理汇总了Golang中github.com/syndtr/goleveldb/leveldb/iterator.Iterator.Valid方法的典型用法代码示例。如果您正苦于以下问题：Golang Iterator.Valid方法的具体用法？Golang Iterator.Valid怎么用？Golang Iterator.Valid使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类github.com/syndtr/goleveldb/leveldb/iterator.Iterator的用法示例。
在下文中一共展示了Iterator.Valid方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。
示例1: safeQuery
// Make the actual query. Sanity checks of the iterator i is expected to
// have been done before calling this function.
func safeQuery(i iter.Iterator, req QueryRequest, res chan StoredEvent) {
defer close(res)
for i.Valid() {
curKey, err := newEventStoreKey(i.Key())
if err != nil {
log.Println("A key could not be deserialized:")
// Panicing here, because this error most
// certainly needs to be looked at by a
// an operator.
log.Panicln(string(i.Key()))
}
if bytes.Compare(curKey.groupKey, eventPrefix) != 0 {
break
}
if bytes.Compare(curKey.key, req.Stream) != 0 {
break
}
resEvent := StoredEvent{
curKey.keyId.toBytes(),
Event{
curKey.key,
[]byte(i.Value()),
},
}
res <- resEvent
keyId := curKey.keyId.toBytes()
if req.ToId != nil && bytes.Compare(req.ToId, keyId) == 0 {
break
}
i.Next()
}
}示例2: TestDb_ClosedIsClosed
func TestDb_ClosedIsClosed(t *testing.T) {
h := newDbHarness(t)
db := h.db
var iter, iter2 iterator.Iterator
var snap *Snapshot
func() {
defer h.close()
h.put("k", "v")
h.getVal("k", "v")
iter = db.NewIterator(nil, h.ro)
iter.Seek([]byte("k"))
testKeyVal(t, iter, "k->v")
var err error
snap, err = db.GetSnapshot()
if err != nil {
t.Fatal("GetSnapshot: got error: ", err)
}
h.getValr(snap, "k", "v")
iter2 = snap.NewIterator(nil, h.ro)
iter2.Seek([]byte("k"))
testKeyVal(t, iter2, "k->v")
h.put("foo", "v2")
h.delete("foo")
// closing DB
iter.Release()
iter2.Release()
}()
assertErr(t, db.Put([]byte("x"), []byte("y"), h.wo), true)
_, err := db.Get([]byte("k"), h.ro)
assertErr(t, err, true)
if iter.Valid() {
t.Errorf("iter.Valid should false")
}
assertErr(t, iter.Error(), false)
testKeyVal(t, iter, "->")
if iter.Seek([]byte("k")) {
t.Errorf("iter.Seek should false")
}
assertErr(t, iter.Error(), true)
assertErr(t, iter2.Error(), false)
_, err = snap.Get([]byte("k"), h.ro)
assertErr(t, err, true)
_, err = db.GetSnapshot()
assertErr(t, err, true)
iter3 := db.NewIterator(nil, h.ro)
assertErr(t, iter3.Error(), true)
iter3 = snap.NewIterator(nil, h.ro)
assertErr(t, iter3.Error(), true)
assertErr(t, db.Delete([]byte("k"), h.wo), true)
_, err = db.GetProperty("leveldb.stats")
assertErr(t, err, true)
_, err = db.SizeOf([]util.Range{{[]byte("a"), []byte("z")}})
assertErr(t, err, true)
assertErr(t, db.CompactRange(util.Range{}), true)
assertErr(t, db.Close(), true)
}