func (s *DynamoStore) Root() hash.Hash {
result, err := s.ddbsvc.GetItem(&dynamodb.GetItemInput{
TableName: aws.String(s.table),
Key: map[string]*dynamodb.AttributeValue{
refAttr: {B: s.rootKey},
},
})
d.PanicIfError(err)
itemLen := len(result.Item)
if itemLen == 0 {
return hash.Hash{}
}
d.Chk.True(itemLen == 2 || itemLen == 3, "Root should have 2 or three attributes on it: %+v", result.Item)
if itemLen == 3 {
d.Chk.True(result.Item[compAttr] != nil)
d.Chk.True(result.Item[compAttr].S != nil)
d.Chk.True(noneValue == *result.Item[compAttr].S)
}
return hash.FromSlice(result.Item[chunkAttr].B)
}
func (s *DynamoStore) processResponses(responses []map[string]*dynamodb.AttributeValue, batch ReadBatch) {
for _, item := range responses {
p := item[refAttr]
d.Chk.True(p != nil)
r := hash.FromSlice(s.removeNamespace(p.B))
p = item[chunkAttr]
d.Chk.True(p != nil)
b := p.B
if p = item[compAttr]; p != nil && *p.S == gzipValue {
gr, err := gzip.NewReader(bytes.NewReader(b))
d.Chk.NoError(err)
buf := &bytes.Buffer{}
_, err = io.Copy(buf, gr)
d.Chk.NoError(err)
b = buf.Bytes()
}
c := NewChunkWithHash(r, b)
for _, reqChan := range batch[r] {
reqChan.Satisfy(c)
}
delete(batch, r)
}
}