331529fc94
* add an Aerospike storage backend * go mod vendor * add Aerospike storage configuration docs * review fixes * bump aerospike client to v3.1.1 * rename the defaultHostname variable * relocate the docs page
103 lines
2.7 KiB
Go
103 lines
2.7 KiB
Go
// Copyright 2013-2020 Aerospike, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package aerospike
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import (
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. "github.com/aerospike/aerospike-client-go/types"
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Buffer "github.com/aerospike/aerospike-client-go/utils/buffer"
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)
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type readHeaderCommand struct {
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singleCommand
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policy *BasePolicy
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record *Record
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replicaSequence int
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}
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func newReadHeaderCommand(cluster *Cluster, policy *BasePolicy, key *Key) (readHeaderCommand, error) {
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partition, err := PartitionForRead(cluster, policy, key)
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if err != nil {
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return readHeaderCommand{}, err
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}
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newReadHeaderCmd := readHeaderCommand{
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singleCommand: newSingleCommand(cluster, key, partition),
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policy: policy,
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}
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return newReadHeaderCmd, nil
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}
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func (cmd *readHeaderCommand) getPolicy(ifc command) Policy {
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return cmd.policy
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}
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func (cmd *readHeaderCommand) writeBuffer(ifc command) error {
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return cmd.setReadHeader(cmd.policy, cmd.key)
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}
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func (cmd *readHeaderCommand) getNode(ifc command) (*Node, error) {
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return cmd.partition.GetNodeRead(cmd.cluster)
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}
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func (cmd *readHeaderCommand) prepareRetry(ifc command, isTimeout bool) bool {
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cmd.partition.PrepareRetryRead(isTimeout)
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return true
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}
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func (cmd *readHeaderCommand) parseResult(ifc command, conn *Connection) error {
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// Read header.
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if _, err := conn.Read(cmd.dataBuffer, int(_MSG_TOTAL_HEADER_SIZE)); err != nil {
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return err
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}
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header := Buffer.BytesToInt64(cmd.dataBuffer, 0)
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// Validate header to make sure we are at the beginning of a message
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if err := cmd.validateHeader(header); err != nil {
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return err
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}
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resultCode := cmd.dataBuffer[13] & 0xFF
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if resultCode == 0 {
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generation := Buffer.BytesToUint32(cmd.dataBuffer, 14)
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expiration := TTL(Buffer.BytesToUint32(cmd.dataBuffer, 18))
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cmd.record = newRecord(cmd.node, cmd.key, nil, generation, expiration)
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} else {
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if ResultCode(resultCode) == KEY_NOT_FOUND_ERROR {
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cmd.record = nil
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} else if ResultCode(resultCode) == FILTERED_OUT {
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return ErrFilteredOut
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} else {
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return NewAerospikeError(ResultCode(resultCode))
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}
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}
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if err := cmd.emptySocket(conn); err != nil {
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return err
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}
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return nil
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}
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func (cmd *readHeaderCommand) GetRecord() *Record {
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return cmd.record
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}
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func (cmd *readHeaderCommand) Execute() error {
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return cmd.execute(cmd, true)
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}
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