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reindex.go
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// Copyright 2012-present Oliver Eilhard. All rights reserved.
// Use of this source code is governed by a MIT-license.
// See http://olivere.mit-license.org/license.txt for details.
package elastic
import (
"context"
"errors"
"fmt"
"net/http"
"net/url"
"strings"
)
// ReindexService is a method to copy documents from one index to another.
// It is documented at https://www.elastic.co/guide/en/elasticsearch/reference/6.8/docs-reindex.html.
type ReindexService struct {
client *Client
pretty *bool // pretty format the returned JSON response
human *bool // return human readable values for statistics
errorTrace *bool // include the stack trace of returned errors
filterPath []string // list of filters used to reduce the response
headers http.Header // custom request-level HTTP headers
refresh string
timeout string
waitForActiveShards string
waitForCompletion *bool
requestsPerSecond *int
slices interface{}
body interface{}
source *ReindexSource
destination *ReindexDestination
conflicts string
size *int
script *Script
}
// NewReindexService creates a new ReindexService.
func NewReindexService(client *Client) *ReindexService {
return &ReindexService{
client: client,
}
}
// Pretty tells Elasticsearch whether to return a formatted JSON response.
func (s *ReindexService) Pretty(pretty bool) *ReindexService {
s.pretty = &pretty
return s
}
// Human specifies whether human readable values should be returned in
// the JSON response, e.g. "7.5mb".
func (s *ReindexService) Human(human bool) *ReindexService {
s.human = &human
return s
}
// ErrorTrace specifies whether to include the stack trace of returned errors.
func (s *ReindexService) ErrorTrace(errorTrace bool) *ReindexService {
s.errorTrace = &errorTrace
return s
}
// FilterPath specifies a list of filters used to reduce the response.
func (s *ReindexService) FilterPath(filterPath ...string) *ReindexService {
s.filterPath = filterPath
return s
}
// Header adds a header to the request.
func (s *ReindexService) Header(name string, value string) *ReindexService {
if s.headers == nil {
s.headers = http.Header{}
}
s.headers.Add(name, value)
return s
}
// Headers specifies the headers of the request.
func (s *ReindexService) Headers(headers http.Header) *ReindexService {
s.headers = headers
return s
}
// WaitForActiveShards sets the number of shard copies that must be active before
// proceeding with the reindex operation. Defaults to 1, meaning the primary shard only.
// Set to `all` for all shard copies, otherwise set to any non-negative value less than or
// equal to the total number of copies for the shard (number of replicas + 1).
func (s *ReindexService) WaitForActiveShards(waitForActiveShards string) *ReindexService {
s.waitForActiveShards = waitForActiveShards
return s
}
// RequestsPerSecond specifies the throttle to set on this request in sub-requests per second.
// -1 means set no throttle as does "unlimited" which is the only non-float this accepts.
func (s *ReindexService) RequestsPerSecond(requestsPerSecond int) *ReindexService {
s.requestsPerSecond = &requestsPerSecond
return s
}
// Slices specifies the number of slices this task should be divided into. Defaults to 1.
// It used to be a number, but can be set to "auto" as of 6.7.
//
// See https://www.elastic.co/guide/en/elasticsearch/reference/6.8/docs-reindex.html#docs-reindex-slice
// for details.
func (s *ReindexService) Slices(slices interface{}) *ReindexService {
s.slices = slices
return s
}
// Refresh indicates whether Elasticsearch should refresh the effected indexes
// immediately.
//
// See https://www.elastic.co/guide/en/elasticsearch/reference/6.8/docs-refresh.html
// for details.
func (s *ReindexService) Refresh(refresh string) *ReindexService {
s.refresh = refresh
return s
}
// Timeout is the time each individual bulk request should wait for shards
// that are unavailable.
func (s *ReindexService) Timeout(timeout string) *ReindexService {
s.timeout = timeout
return s
}
// WaitForCompletion indicates whether Elasticsearch should block until the
// reindex is complete.
func (s *ReindexService) WaitForCompletion(waitForCompletion bool) *ReindexService {
s.waitForCompletion = &waitForCompletion
return s
}
// Source specifies the source of the reindexing process.
func (s *ReindexService) Source(source *ReindexSource) *ReindexService {
s.source = source
return s
}
// SourceIndex specifies the source index of the reindexing process.
func (s *ReindexService) SourceIndex(index string) *ReindexService {
if s.source == nil {
s.source = NewReindexSource()
}
s.source = s.source.Index(index)
return s
}
// Destination specifies the destination of the reindexing process.
func (s *ReindexService) Destination(destination *ReindexDestination) *ReindexService {
s.destination = destination
return s
}
// DestinationIndex specifies the destination index of the reindexing process.
func (s *ReindexService) DestinationIndex(index string) *ReindexService {
if s.destination == nil {
s.destination = NewReindexDestination()
}
s.destination = s.destination.Index(index)
return s
}
// DestinationIndexAndType specifies both the destination index and type
// of the reindexing process.
func (s *ReindexService) DestinationIndexAndType(index, typ string) *ReindexService {
if s.destination == nil {
s.destination = NewReindexDestination()
}
s.destination = s.destination.Index(index)
s.destination = s.destination.Type(typ)
return s
}
// Conflicts indicates what to do when the process detects version conflicts.
// Possible values are "proceed" and "abort".
func (s *ReindexService) Conflicts(conflicts string) *ReindexService {
s.conflicts = conflicts
return s
}
// AbortOnVersionConflict aborts the request on version conflicts.
// It is an alias to setting Conflicts("abort").
func (s *ReindexService) AbortOnVersionConflict() *ReindexService {
s.conflicts = "abort"
return s
}
// ProceedOnVersionConflict aborts the request on version conflicts.
// It is an alias to setting Conflicts("proceed").
func (s *ReindexService) ProceedOnVersionConflict() *ReindexService {
s.conflicts = "proceed"
return s
}
// Size sets an upper limit for the number of processed documents.
func (s *ReindexService) Size(size int) *ReindexService {
s.size = &size
return s
}
// Script allows for modification of the documents as they are reindexed
// from source to destination.
func (s *ReindexService) Script(script *Script) *ReindexService {
s.script = script
return s
}
// Body specifies the body of the request to send to Elasticsearch.
// It overrides settings specified with other setters, e.g. Query.
func (s *ReindexService) Body(body interface{}) *ReindexService {
s.body = body
return s
}
// buildURL builds the URL for the operation.
func (s *ReindexService) buildURL() (string, url.Values, error) {
// Build URL path
path := "/_reindex"
// Add query string parameters
params := url.Values{}
if v := s.pretty; v != nil {
params.Set("pretty", fmt.Sprint(*v))
}
if v := s.human; v != nil {
params.Set("human", fmt.Sprint(*v))
}
if v := s.errorTrace; v != nil {
params.Set("error_trace", fmt.Sprint(*v))
}
if len(s.filterPath) > 0 {
params.Set("filter_path", strings.Join(s.filterPath, ","))
}
if s.refresh != "" {
params.Set("refresh", s.refresh)
}
if s.timeout != "" {
params.Set("timeout", s.timeout)
}
if s.requestsPerSecond != nil {
params.Set("requests_per_second", fmt.Sprintf("%v", *s.requestsPerSecond))
}
if s.slices != nil {
params.Set("slices", fmt.Sprintf("%v", s.slices))
}
if s.waitForActiveShards != "" {
params.Set("wait_for_active_shards", s.waitForActiveShards)
}
if s.waitForCompletion != nil {
params.Set("wait_for_completion", fmt.Sprintf("%v", *s.waitForCompletion))
}
return path, params, nil
}
// Validate checks if the operation is valid.
func (s *ReindexService) Validate() error {
var invalid []string
if s.body != nil {
return nil
}
if s.source == nil {
invalid = append(invalid, "Source")
} else {
if len(s.source.request.indices) == 0 {
invalid = append(invalid, "Source.Index")
}
}
if s.destination == nil {
invalid = append(invalid, "Destination")
}
if len(invalid) > 0 {
return fmt.Errorf("missing required fields: %v", invalid)
}
return nil
}
// getBody returns the body part of the document request.
func (s *ReindexService) getBody() (interface{}, error) {
if s.body != nil {
return s.body, nil
}
body := make(map[string]interface{})
if s.conflicts != "" {
body["conflicts"] = s.conflicts
}
if s.size != nil {
body["size"] = *s.size
}
if s.script != nil {
out, err := s.script.Source()
if err != nil {
return nil, err
}
body["script"] = out
}
src, err := s.source.Source()
if err != nil {
return nil, err
}
body["source"] = src
dst, err := s.destination.Source()
if err != nil {
return nil, err
}
body["dest"] = dst
return body, nil
}
// Do executes the operation.
func (s *ReindexService) Do(ctx context.Context) (*BulkIndexByScrollResponse, error) {
// Check pre-conditions
if err := s.Validate(); err != nil {
return nil, err
}
// Get URL for request
path, params, err := s.buildURL()
if err != nil {
return nil, err
}
// Setup HTTP request body
body, err := s.getBody()
if err != nil {
return nil, err
}
// Get HTTP response
res, err := s.client.PerformRequest(ctx, PerformRequestOptions{
Method: "POST",
Path: path,
Params: params,
Body: body,
Headers: s.headers,
})
if err != nil {
return nil, err
}
// Return operation response
ret := new(BulkIndexByScrollResponse)
if err := s.client.decoder.Decode(res.Body, ret); err != nil {
return nil, err
}
ret.Header = res.Header
return ret, nil
}
// DoAsync executes the reindexing operation asynchronously by starting a new task.
// Callers need to use the Task Management API to watch the outcome of the reindexing
// operation.
func (s *ReindexService) DoAsync(ctx context.Context) (*StartTaskResult, error) {
// Check pre-conditions
if err := s.Validate(); err != nil {
return nil, err
}
// DoAsync only makes sense with WaitForCompletion set to true
if s.waitForCompletion != nil && *s.waitForCompletion {
return nil, fmt.Errorf("cannot start a task with WaitForCompletion set to true")
}
f := false
s.waitForCompletion = &f
// Get URL for request
path, params, err := s.buildURL()
if err != nil {
return nil, err
}
// Setup HTTP request body
body, err := s.getBody()
if err != nil {
return nil, err
}
// Get HTTP response
res, err := s.client.PerformRequest(ctx, PerformRequestOptions{
Method: "POST",
Path: path,
Params: params,
Body: body,
Headers: s.headers,
})
if err != nil {
return nil, err
}
// Return operation response
ret := new(StartTaskResult)
if err := s.client.decoder.Decode(res.Body, ret); err != nil {
return nil, err
}
ret.Header = res.Header
return ret, nil
}
// -- Source of Reindex --
// ReindexSource specifies the source of a Reindex process.
type ReindexSource struct {
request *SearchRequest
remoteInfo *ReindexRemoteInfo
}
// NewReindexSource creates a new ReindexSource.
func NewReindexSource() *ReindexSource {
return &ReindexSource{
request: NewSearchRequest(),
}
}
// Request specifies the search request used for source.
func (r *ReindexSource) Request(request *SearchRequest) *ReindexSource {
if request == nil {
r.request = NewSearchRequest()
} else {
r.request = request
}
return r
}
// SearchType is the search operation type. Possible values are
// "query_then_fetch" and "dfs_query_then_fetch".
func (r *ReindexSource) SearchType(searchType string) *ReindexSource {
r.request = r.request.SearchType(searchType)
return r
}
func (r *ReindexSource) SearchTypeDfsQueryThenFetch() *ReindexSource {
r.request = r.request.SearchType("dfs_query_then_fetch")
return r
}
func (r *ReindexSource) SearchTypeQueryThenFetch() *ReindexSource {
r.request = r.request.SearchType("query_then_fetch")
return r
}
func (r *ReindexSource) Index(indices ...string) *ReindexSource {
r.request = r.request.Index(indices...)
return r
}
func (r *ReindexSource) Type(types ...string) *ReindexSource {
r.request = r.request.Type(types...)
return r
}
func (r *ReindexSource) Preference(preference string) *ReindexSource {
r.request = r.request.Preference(preference)
return r
}
func (r *ReindexSource) RequestCache(requestCache bool) *ReindexSource {
r.request = r.request.RequestCache(requestCache)
return r
}
func (r *ReindexSource) Scroll(scroll string) *ReindexSource {
r.request = r.request.Scroll(scroll)
return r
}
func (r *ReindexSource) Query(query Query) *ReindexSource {
r.request = r.request.Query(query)
return r
}
// Sort adds a sort order.
func (r *ReindexSource) Sort(field string, ascending bool) *ReindexSource {
r.request = r.request.Sort(field, ascending)
return r
}
// SortWithInfo adds a sort order.
func (r *ReindexSource) SortWithInfo(info SortInfo) *ReindexSource {
r.request = r.request.SortWithInfo(info)
return r
}
// SortBy adds a sort order.
func (r *ReindexSource) SortBy(sorter ...Sorter) *ReindexSource {
r.request = r.request.SortBy(sorter...)
return r
}
// FetchSource indicates whether the response should contain the stored
// _source for every hit.
func (r *ReindexSource) FetchSource(fetchSource bool) *ReindexSource {
r.request = r.request.FetchSource(fetchSource)
return r
}
// FetchSourceIncludeExclude specifies that _source should be returned
// with each hit, where "include" and "exclude" serve as a simple wildcard
// matcher that gets applied to its fields
// (e.g. include := []string{"obj1.*","obj2.*"}, exclude := []string{"description.*"}).
func (r *ReindexSource) FetchSourceIncludeExclude(include, exclude []string) *ReindexSource {
r.request = r.request.FetchSourceIncludeExclude(include, exclude)
return r
}
// FetchSourceContext indicates how the _source should be fetched.
func (r *ReindexSource) FetchSourceContext(fsc *FetchSourceContext) *ReindexSource {
r.request = r.request.FetchSourceContext(fsc)
return r
}
// RemoteInfo sets up reindexing from a remote cluster.
func (r *ReindexSource) RemoteInfo(ri *ReindexRemoteInfo) *ReindexSource {
r.remoteInfo = ri
return r
}
// Source returns a serializable JSON request for the request.
func (r *ReindexSource) Source() (interface{}, error) {
src, err := r.request.sourceAsMap()
if err != nil {
return nil, err
}
source, ok := src.(map[string]interface{})
if !ok {
return nil, errors.New("unable to use SearchRequest as map[string]interface{}")
}
switch len(r.request.indices) {
case 1:
source["index"] = r.request.indices[0]
default:
source["index"] = r.request.indices
}
switch len(r.request.types) {
case 0:
case 1:
source["type"] = r.request.types[0]
default:
source["type"] = r.request.types
}
if r.remoteInfo != nil {
src, err := r.remoteInfo.Source()
if err != nil {
return nil, err
}
source["remote"] = src
}
return source, nil
}
// ReindexRemoteInfo contains information for reindexing from a remote cluster.
type ReindexRemoteInfo struct {
host string
username string
password string
socketTimeout string // e.g. "1m" or "30s"
connectTimeout string // e.g. "1m" or "30s"
}
// NewReindexRemoteInfo creates a new ReindexRemoteInfo.
func NewReindexRemoteInfo() *ReindexRemoteInfo {
return &ReindexRemoteInfo{}
}
// Host sets the host information of the remote cluster.
// It must be of the form "http(s)://<hostname>:<port>"
func (ri *ReindexRemoteInfo) Host(host string) *ReindexRemoteInfo {
ri.host = host
return ri
}
// Username sets the username to authenticate with the remote cluster.
func (ri *ReindexRemoteInfo) Username(username string) *ReindexRemoteInfo {
ri.username = username
return ri
}
// Password sets the password to authenticate with the remote cluster.
func (ri *ReindexRemoteInfo) Password(password string) *ReindexRemoteInfo {
ri.password = password
return ri
}
// SocketTimeout sets the socket timeout to connect with the remote cluster.
// Use ES compatible values like e.g. "30s" or "1m".
func (ri *ReindexRemoteInfo) SocketTimeout(timeout string) *ReindexRemoteInfo {
ri.socketTimeout = timeout
return ri
}
// ConnectTimeout sets the connection timeout to connect with the remote cluster.
// Use ES compatible values like e.g. "30s" or "1m".
func (ri *ReindexRemoteInfo) ConnectTimeout(timeout string) *ReindexRemoteInfo {
ri.connectTimeout = timeout
return ri
}
// Source returns the serializable JSON data for the request.
func (ri *ReindexRemoteInfo) Source() (interface{}, error) {
res := make(map[string]interface{})
res["host"] = ri.host
if len(ri.username) > 0 {
res["username"] = ri.username
}
if len(ri.password) > 0 {
res["password"] = ri.password
}
if len(ri.socketTimeout) > 0 {
res["socket_timeout"] = ri.socketTimeout
}
if len(ri.connectTimeout) > 0 {
res["connect_timeout"] = ri.connectTimeout
}
return res, nil
}
// -source Destination of Reindex --
// ReindexDestination is the destination of a Reindex API call.
// It is basically the meta data of a BulkIndexRequest.
//
// See https://www.elastic.co/guide/en/elasticsearch/reference/6.8/docs-reindex.html
// fsourcer details.
type ReindexDestination struct {
index string
typ string
routing string
parent string
opType string
version int64 // default is MATCH_ANY
versionType string // default is "internal"
pipeline string
}
// NewReindexDestination returns a new ReindexDestination.
func NewReindexDestination() *ReindexDestination {
return &ReindexDestination{}
}
// Index specifies name of the Elasticsearch index to use as the destination
// of a reindexing process.
func (r *ReindexDestination) Index(index string) *ReindexDestination {
r.index = index
return r
}
// Type specifies the Elasticsearch type to use for reindexing.
func (r *ReindexDestination) Type(typ string) *ReindexDestination {
r.typ = typ
return r
}
// Routing specifies a routing value for the reindexing request.
// It can be "keep", "discard", or start with "=". The latter specifies
// the routing on the bulk request.
func (r *ReindexDestination) Routing(routing string) *ReindexDestination {
r.routing = routing
return r
}
// Keep sets the routing on the bulk request sent for each match to the routing
// of the match (the default).
func (r *ReindexDestination) Keep() *ReindexDestination {
r.routing = "keep"
return r
}
// Discard sets the routing on the bulk request sent for each match to null.
func (r *ReindexDestination) Discard() *ReindexDestination {
r.routing = "discard"
return r
}
// Parent specifies the identifier of the parent document (if available).
func (r *ReindexDestination) Parent(parent string) *ReindexDestination {
r.parent = parent
return r
}
// OpType specifies if this request should follow create-only or upsert
// behavior. This follows the OpType of the standard document index API.
// See https://www.elastic.co/guide/en/elasticsearch/reference/6.8/docs-index_.html#operation-type
// for details.
func (r *ReindexDestination) OpType(opType string) *ReindexDestination {
r.opType = opType
return r
}
// Version indicates the version of the document as part of an optimistic
// concurrency model.
func (r *ReindexDestination) Version(version int64) *ReindexDestination {
r.version = version
return r
}
// VersionType specifies how versions are created.
func (r *ReindexDestination) VersionType(versionType string) *ReindexDestination {
r.versionType = versionType
return r
}
// Pipeline specifies the pipeline to use for reindexing.
func (r *ReindexDestination) Pipeline(pipeline string) *ReindexDestination {
r.pipeline = pipeline
return r
}
// Source returns a serializable JSON request for the request.
func (r *ReindexDestination) Source() (interface{}, error) {
source := make(map[string]interface{})
if r.index != "" {
source["index"] = r.index
}
if r.typ != "" {
source["type"] = r.typ
}
if r.routing != "" {
source["routing"] = r.routing
}
if r.opType != "" {
source["op_type"] = r.opType
}
if r.parent != "" {
source["parent"] = r.parent
}
if r.version > 0 {
source["version"] = r.version
}
if r.versionType != "" {
source["version_type"] = r.versionType
}
if r.pipeline != "" {
source["pipeline"] = r.pipeline
}
return source, nil
}