/
client_reflect.go
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/
client_reflect.go
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// +build !as_performance
// Copyright 2013-2016 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 (
"reflect"
. "github.com/aerospike/aerospike-client-go/types"
xornd "github.com/aerospike/aerospike-client-go/types/rand"
)
// PutObject writes record bin(s) to the server.
// The policy specifies the transaction timeout, record expiration and how the transaction is
// handled when the record already exists.
// If the policy is nil, the default relevant policy will be used.
func (clnt *Client) PutObject(policy *WritePolicy, key *Key, obj interface{}) (err error) {
policy = clnt.getUsableWritePolicy(policy)
bins := marshal(obj, clnt.cluster.supportsFloat.Get())
command := newWriteCommand(clnt.cluster, policy, key, bins, nil, WRITE)
res := command.Execute()
binPool.Put(bins)
return res
}
// GetObject reads a record for specified key and puts the result into the provided object.
// The policy can be used to specify timeouts.
// If the policy is nil, the default relevant policy will be used.
func (clnt *Client) GetObject(policy *BasePolicy, key *Key, obj interface{}) error {
policy = clnt.getUsablePolicy(policy)
rval := reflect.ValueOf(obj)
binNames := objectMappings.getFields(rval.Type())
command := newReadCommand(clnt.cluster, policy, key, binNames)
command.object = &rval
return command.Execute()
}
// ScanAllObjects reads all records in specified namespace and set from all nodes.
// If the policy's concurrentNodes is specified, each server node will be read in
// parallel. Otherwise, server nodes are read sequentially.
// If the policy is nil, the default relevant policy will be used.
func (clnt *Client) ScanAllObjects(apolicy *ScanPolicy, objChan interface{}, namespace string, setName string, binNames ...string) (*Recordset, error) {
policy := *clnt.getUsableScanPolicy(apolicy)
nodes := clnt.cluster.GetNodes()
if len(nodes) == 0 {
return nil, NewAerospikeError(SERVER_NOT_AVAILABLE, "Scan failed because cluster is empty.")
}
if policy.WaitUntilMigrationsAreOver {
// wait until all migrations are finished
if err := clnt.cluster.WaitUntillMigrationIsFinished(policy.Timeout); err != nil {
return nil, err
}
}
// result recordset
taskId := uint64(xornd.Int64())
os := newObjectset(reflect.ValueOf(objChan), len(nodes), taskId)
res := &Recordset{
objectset: *os,
}
// the whole call should be wrapped in a goroutine
if policy.ConcurrentNodes {
for _, node := range nodes {
go func(node *Node) {
if err := clnt.scanNodeObjects(&policy, node, res, namespace, setName, taskId, binNames...); err != nil {
res.sendError(err)
}
}(node)
}
} else {
// scan nodes one by one
go func() {
for _, node := range nodes {
if err := clnt.scanNodeObjects(&policy, node, res, namespace, setName, taskId, binNames...); err != nil {
res.sendError(err)
continue
}
}
}()
}
return res, nil
}
// scanNodeObjects reads all records in specified namespace and set for one node only,
// and marshalls the results into the objects of the provided channel in Recordset.
// If the policy is nil, the default relevant policy will be used.
// The resulting records will be marshalled into the objChan.
// objChan will be closed after all the records are read.
func (clnt *Client) ScanNodeObjects(apolicy *ScanPolicy, node *Node, objChan interface{}, namespace string, setName string, binNames ...string) (*Recordset, error) {
policy := *clnt.getUsableScanPolicy(apolicy)
// results channel must be async for performance
taskId := uint64(xornd.Int64())
os := newObjectset(reflect.ValueOf(objChan), 1, taskId)
res := &Recordset{
objectset: *os,
}
go clnt.scanNodeObjects(&policy, node, res, namespace, setName, taskId, binNames...)
return res, nil
}
// scanNodeObjects reads all records in specified namespace and set for one node only,
// and marshalls the results into the objects of the provided channel in Recordset.
// If the policy is nil, the default relevant policy will be used.
func (clnt *Client) scanNodeObjects(policy *ScanPolicy, node *Node, recordset *Recordset, namespace string, setName string, taskId uint64, binNames ...string) error {
if policy.WaitUntilMigrationsAreOver {
// wait until migrations on node are finished
if err := node.WaitUntillMigrationIsFinished(policy.Timeout); err != nil {
recordset.signalEnd()
return err
}
}
command := newScanObjectsCommand(node, policy, namespace, setName, binNames, recordset, taskId)
return command.Execute()
}
// QueryNodeObjects executes a query on all nodes in the cluster and marshals the records into the given channel.
// The query executor puts records on the channel from separate goroutines.
// The caller can concurrently pop objects.
//
// This method is only supported by Aerospike 3 servers.
// If the policy is nil, the default relevant policy will be used.
func (clnt *Client) QueryObjects(policy *QueryPolicy, statement *Statement, objChan interface{}) (*Recordset, error) {
policy = clnt.getUsableQueryPolicy(policy)
nodes := clnt.cluster.GetNodes()
if len(nodes) == 0 {
return nil, NewAerospikeError(SERVER_NOT_AVAILABLE, "Query failed because cluster is empty.")
}
if policy.WaitUntilMigrationsAreOver {
// wait until all migrations are finished
if err := clnt.cluster.WaitUntillMigrationIsFinished(policy.Timeout); err != nil {
return nil, err
}
}
// results channel must be async for performance
os := newObjectset(reflect.ValueOf(objChan), len(nodes), statement.TaskId)
recSet := &Recordset{
objectset: *os,
}
// the whole call sho
// results channel must be async for performance
for _, node := range nodes {
// copy policies to avoid race conditions
newPolicy := *policy
command := newQueryObjectsCommand(node, &newPolicy, statement, recSet)
go func() {
err := command.Execute()
if err != nil {
recSet.sendError(err)
}
}()
}
return recSet, nil
}
// QueryNodeObjects executes a query on a specific node and marshals the records into the given channel.
// The caller can concurrently pop records off the channel.
//
// This method is only supported by Aerospike 3 servers.
// If the policy is nil, the default relevant policy will be used.
func (clnt *Client) QueryNodeObjects(policy *QueryPolicy, node *Node, statement *Statement, objChan interface{}) (*Recordset, error) {
policy = clnt.getUsableQueryPolicy(policy)
if policy.WaitUntilMigrationsAreOver {
// wait until all migrations are finished
if err := clnt.cluster.WaitUntillMigrationIsFinished(policy.Timeout); err != nil {
return nil, err
}
}
// results channel must be async for performance
os := newObjectset(reflect.ValueOf(objChan), 1, statement.TaskId)
recSet := &Recordset{
objectset: *os,
}
// copy policies to avoid race conditions
newPolicy := *policy
command := newQueryRecordCommand(node, &newPolicy, statement, recSet)
go func() {
err := command.Execute()
if err != nil {
recSet.sendError(err)
}
}()
return recSet, nil
}