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partition_tokenizer_old.go
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/
partition_tokenizer_old.go
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// Copyright 2013-2014 Aerospike, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package aerospike
import (
"strconv"
"strings"
. "github.com/aerospike/aerospike-client-go/logger"
. "github.com/aerospike/aerospike-client-go/types"
)
// Parse node partitions using old protocol. This is more code than a String.split() implementation,
// but it's faster because there are much fewer interim strings.
type partitionTokenizerOld struct {
buffer []byte
length int
offset int
}
func newPartitionTokenizerOld(conn *Connection) (*partitionTokenizerOld, error) {
pt := &partitionTokenizerOld{}
// Use low-level info methods and parse byte array directly for maximum performance.
// Send format: replicas-master\n
// Receive format: replicas-master\t<ns1>:<base 64 encoded bitmap>;<ns2>:<base 64 encoded bitmap>... \n
infoMap, err := RequestInfo(conn, replicasName)
if err != nil {
return nil, err
}
info := infoMap[replicasName]
pt.length = len(info)
if pt.length == 0 {
return nil, NewAerospikeError(PARSE_ERROR, replicasName+" is empty")
}
pt.buffer = []byte(info)
return pt, nil
}
func (pt *partitionTokenizerOld) UpdatePartition(nmap map[string][]*Node, node *Node) (map[string][]*Node, error) {
var amap map[string][]*Node
copied := false
for partition, err := pt.getNext(); ; partition, err = pt.getNext() {
if partition == nil {
if err != nil {
return nil, err
}
break
}
nodeArray, exists := nmap[partition.Namespace]
if !exists {
if !copied {
// Make shallow copy of map.
amap = make(map[string][]*Node, len(nmap))
for k, v := range nmap {
amap[k] = v
}
copied = true
}
nodeArray := make([]*Node, _PARTITIONS)
amap[partition.Namespace] = nodeArray
}
Logger.Debug(partition.String() + "," + node.name)
nodeArray[partition.PartitionId] = node
}
if copied {
return amap, nil
}
return nil, nil
}
func (pt *partitionTokenizerOld) getNext() (*Partition, error) {
begin := pt.offset
for pt.offset < pt.length {
if pt.buffer[pt.offset] == ':' {
// Parse namespace.
namespace := strings.Trim(string(pt.buffer[begin:pt.offset]), " ")
if len(namespace) <= 0 || len(namespace) >= 32 {
response := pt.getTruncatedResponse()
return nil, NewAerospikeError(PARSE_ERROR, "Invalid partition namespace "+
namespace+". Response="+response)
}
pt.offset++
begin = pt.offset
// Parse partition id.
for pt.offset < pt.length {
b := pt.buffer[pt.offset]
if b == ';' || b == '\n' {
break
}
pt.offset++
}
if pt.offset == begin {
response := pt.getTruncatedResponse()
return nil, NewAerospikeError(PARSE_ERROR, "Empty partition id for namespace "+
namespace+". Response="+response)
}
partitionId, err := strconv.Atoi(string(pt.buffer[begin:pt.offset]))
if err != nil {
return nil, err
}
if partitionId < 0 || partitionId >= _PARTITIONS {
response := pt.getTruncatedResponse()
partitionString := string(pt.buffer[begin:pt.offset])
return nil, NewAerospikeError(PARSE_ERROR, "Invalid partition id "+partitionString+
" for namespace "+namespace+". Response="+response)
}
pt.offset++
begin = pt.offset
return NewPartition(namespace, partitionId), nil
}
pt.offset++
}
return nil, nil
}
func (pt *partitionTokenizerOld) getTruncatedResponse() string {
max := pt.length
if pt.length > 200 {
pt.length = max
}
return string(pt.buffer[:max])
}