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// Copyright 2012-2015 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 (
"encoding/json"
"fmt"
"net/url"
"strings"
"gopkg.in/olivere/elastic.v3/uritemplates"
)
// DeleteByQueryService deletes documents that match a query.
// See http://www.elasticsearch.org/guide/en/elasticsearch/reference/master/docs-delete-by-query.html.
type DeleteByQueryService struct {
client *Client
indices []string
types []string
analyzer string
consistency string
defaultOper string
df string
ignoreUnavailable *bool
allowNoIndices *bool
expandWildcards string
replication string
routing string
timeout string
pretty bool
q string
query Query
}
// NewDeleteByQueryService creates a new DeleteByQueryService.
// You typically use the client's DeleteByQuery to get a reference to
// the service.
func NewDeleteByQueryService(client *Client) *DeleteByQueryService {
builder := &DeleteByQueryService{
client: client,
}
return builder
}
// Index sets the indices on which to perform the delete operation.
func (s *DeleteByQueryService) Index(indices ...string) *DeleteByQueryService {
if s.indices == nil {
s.indices = make([]string, 0)
}
s.indices = append(s.indices, indices...)
return s
}
// Type limits the delete operation to the given types.
func (s *DeleteByQueryService) Type(types ...string) *DeleteByQueryService {
if s.types == nil {
s.types = make([]string, 0)
}
s.types = append(s.types, types...)
return s
}
// Analyzer to use for the query string.
func (s *DeleteByQueryService) Analyzer(analyzer string) *DeleteByQueryService {
s.analyzer = analyzer
return s
}
// Consistency represents the specific write consistency setting for the operation.
// It can be one, quorum, or all.
func (s *DeleteByQueryService) Consistency(consistency string) *DeleteByQueryService {
s.consistency = consistency
return s
}
// DefaultOperator for query string query (AND or OR).
func (s *DeleteByQueryService) DefaultOperator(defaultOperator string) *DeleteByQueryService {
s.defaultOper = defaultOperator
return s
}
// DF is the field to use as default where no field prefix is given in the query string.
func (s *DeleteByQueryService) DF(defaultField string) *DeleteByQueryService {
s.df = defaultField
return s
}
// DefaultField is the field to use as default where no field prefix is given in the query string.
// It is an alias to the DF func.
func (s *DeleteByQueryService) DefaultField(defaultField string) *DeleteByQueryService {
s.df = defaultField
return s
}
// IgnoreUnavailable indicates whether specified concrete indices should be
// ignored when unavailable (missing or closed).
func (s *DeleteByQueryService) IgnoreUnavailable(ignore bool) *DeleteByQueryService {
s.ignoreUnavailable = &ignore
return s
}
// AllowNoIndices indicates whether to ignore if a wildcard indices
// expression resolves into no concrete indices (including the _all string
// or when no indices have been specified).
func (s *DeleteByQueryService) AllowNoIndices(allow bool) *DeleteByQueryService {
s.allowNoIndices = &allow
return s
}
// ExpandWildcards indicates whether to expand wildcard expression to
// concrete indices that are open, closed or both. It can be "open" or "closed".
func (s *DeleteByQueryService) ExpandWildcards(expand string) *DeleteByQueryService {
s.expandWildcards = expand
return s
}
// Replication sets a specific replication type (sync or async).
func (s *DeleteByQueryService) Replication(replication string) *DeleteByQueryService {
s.replication = replication
return s
}
// Q specifies the query in Lucene query string syntax. You can also use
// Query to programmatically specify the query.
func (s *DeleteByQueryService) Q(query string) *DeleteByQueryService {
s.q = query
return s
}
// QueryString is an alias to Q. Notice that you can also use Query to
// programmatically set the query.
func (s *DeleteByQueryService) QueryString(query string) *DeleteByQueryService {
s.q = query
return s
}
// Routing sets a specific routing value.
func (s *DeleteByQueryService) Routing(routing string) *DeleteByQueryService {
s.routing = routing
return s
}
// Timeout sets an explicit operation timeout, e.g. "1s" or "10000ms".
func (s *DeleteByQueryService) Timeout(timeout string) *DeleteByQueryService {
s.timeout = timeout
return s
}
// Pretty indents the JSON output from Elasticsearch.
func (s *DeleteByQueryService) Pretty(pretty bool) *DeleteByQueryService {
s.pretty = pretty
return s
}
// Query sets the query programmatically.
func (s *DeleteByQueryService) Query(query Query) *DeleteByQueryService {
s.query = query
return s
}
// Do executes the delete-by-query operation.
func (s *DeleteByQueryService) Do() (*DeleteByQueryResult, error) {
var err error
// Build url
path := "/"
// Indices part
indexPart := make([]string, 0)
for _, index := range s.indices {
index, err = uritemplates.Expand("{index}", map[string]string{
"index": index,
})
if err != nil {
return nil, err
}
indexPart = append(indexPart, index)
}
if len(indexPart) > 0 {
path += strings.Join(indexPart, ",")
}
// Types part
typesPart := make([]string, 0)
for _, typ := range s.types {
typ, err = uritemplates.Expand("{type}", map[string]string{
"type": typ,
})
if err != nil {
return nil, err
}
typesPart = append(typesPart, typ)
}
if len(typesPart) > 0 {
path += "/" + strings.Join(typesPart, ",")
}
// Search
path += "/_query"
// Parameters
params := make(url.Values)
if s.analyzer != "" {
params.Set("analyzer", s.analyzer)
}
if s.consistency != "" {
params.Set("consistency", s.consistency)
}
if s.defaultOper != "" {
params.Set("default_operator", s.defaultOper)
}
if s.df != "" {
params.Set("df", s.df)
}
if s.ignoreUnavailable != nil {
params.Set("ignore_unavailable", fmt.Sprintf("%v", *s.ignoreUnavailable))
}
if s.allowNoIndices != nil {
params.Set("allow_no_indices", fmt.Sprintf("%v", *s.allowNoIndices))
}
if s.expandWildcards != "" {
params.Set("expand_wildcards", s.expandWildcards)
}
if s.replication != "" {
params.Set("replication", s.replication)
}
if s.routing != "" {
params.Set("routing", s.routing)
}
if s.timeout != "" {
params.Set("timeout", s.timeout)
}
if s.pretty {
params.Set("pretty", fmt.Sprintf("%v", s.pretty))
}
if s.q != "" {
params.Set("q", s.q)
}
// Set body if there is a query set
var body interface{}
if s.query != nil {
src, err := s.query.Source()
if err != nil {
return nil, err
}
query := make(map[string]interface{})
query["query"] = src
body = query
}
// Get response
res, err := s.client.PerformRequest("DELETE", path, params, body)
if err != nil {
return nil, err
}
// Return result
ret := new(DeleteByQueryResult)
if err := json.Unmarshal(res.Body, ret); err != nil {
return nil, err
}
return ret, nil
}
// DeleteByQueryResult is the outcome of executing Do with DeleteByQueryService.
type DeleteByQueryResult struct {
Took int64 `json:"took"`
TimedOut bool `json:"timed_out"`
Indices map[string]IndexDeleteByQueryResult `json:"_indices"`
Failures []shardOperationFailure `json:"failures"`
}
// IndexNames returns the names of the indices the DeleteByQuery touched.
func (res DeleteByQueryResult) IndexNames() []string {
var indices []string
for index, _ := range res.Indices {
indices = append(indices, index)
}
return indices
}
// All returns the index delete-by-query result of all indices.
func (res DeleteByQueryResult) All() IndexDeleteByQueryResult {
all, _ := res.Indices["_all"]
return all
}
// IndexDeleteByQueryResult is the result of a delete-by-query for a specific
// index.
type IndexDeleteByQueryResult struct {
// Found documents, matching the query.
Found int `json:"found"`
// Deleted documents, successfully, from the given index.
Deleted int `json:"deleted"`
// Missing documents when trying to delete them.
Missing int `json:"missing"`
// Failed documents to be deleted for the given index.
Failed int `json:"failed"`
}
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