api: Implement bucket notification. (#2271)

* Implement basic S3 notifications through queues

Supports multiple queues and three basic queue types:

1. NilQueue -- messages don't get sent anywhere
2. LogQueue -- messages get logged
3. AmqpQueue -- messages are sent to an AMQP queue

* api: Implement bucket notification.

Supports two different queue types

- AMQP
- ElasticSearch.

* Add support for redis

vendor/gopkg.in/olivere/elastic.v3/indices_get_template.go

@@ -0,0 +1,127 @@
+// 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 (
+	"fmt"
+	"net/url"
+	"strings"
+
+	"gopkg.in/olivere/elastic.v3/uritemplates"
+)
+
+// IndicesGetTemplateService returns an index template.
+// See http://www.elasticsearch.org/guide/en/elasticsearch/reference/1.4/indices-templates.html.
+type IndicesGetTemplateService struct {
+	client       *Client
+	pretty       bool
+	name         []string
+	flatSettings *bool
+	local        *bool
+}
+
+// NewIndicesGetTemplateService creates a new IndicesGetTemplateService.
+func NewIndicesGetTemplateService(client *Client) *IndicesGetTemplateService {
+	return &IndicesGetTemplateService{
+		client: client,
+		name:   make([]string, 0),
+	}
+}
+
+// Name is the name of the index template.
+func (s *IndicesGetTemplateService) Name(name ...string) *IndicesGetTemplateService {
+	s.name = append(s.name, name...)
+	return s
+}
+
+// FlatSettings is returns settings in flat format (default: false).
+func (s *IndicesGetTemplateService) FlatSettings(flatSettings bool) *IndicesGetTemplateService {
+	s.flatSettings = &flatSettings
+	return s
+}
+
+// Local indicates whether to return local information, i.e. do not retrieve
+// the state from master node (default: false).
+func (s *IndicesGetTemplateService) Local(local bool) *IndicesGetTemplateService {
+	s.local = &local
+	return s
+}
+
+// Pretty indicates that the JSON response be indented and human readable.
+func (s *IndicesGetTemplateService) Pretty(pretty bool) *IndicesGetTemplateService {
+	s.pretty = pretty
+	return s
+}
+
+// buildURL builds the URL for the operation.
+func (s *IndicesGetTemplateService) buildURL() (string, url.Values, error) {
+	// Build URL
+	var err error
+	var path string
+	if len(s.name) > 0 {
+		path, err = uritemplates.Expand("/_template/{name}", map[string]string{
+			"name": strings.Join(s.name, ","),
+		})
+	} else {
+		path = "/_template"
+	}
+	if err != nil {
+		return "", url.Values{}, err
+	}
+
+	// Add query string parameters
+	params := url.Values{}
+	if s.pretty {
+		params.Set("pretty", "1")
+	}
+	if s.flatSettings != nil {
+		params.Set("flat_settings", fmt.Sprintf("%v", *s.flatSettings))
+	}
+	if s.local != nil {
+		params.Set("local", fmt.Sprintf("%v", *s.local))
+	}
+	return path, params, nil
+}
+
+// Validate checks if the operation is valid.
+func (s *IndicesGetTemplateService) Validate() error {
+	return nil
+}
+
+// Do executes the operation.
+func (s *IndicesGetTemplateService) Do() (map[string]*IndicesGetTemplateResponse, 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
+	}
+
+	// Get HTTP response
+	res, err := s.client.PerformRequest("GET", path, params, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	// Return operation response
+	var ret map[string]*IndicesGetTemplateResponse
+	if err := s.client.decoder.Decode(res.Body, &ret); err != nil {
+		return nil, err
+	}
+	return ret, nil
+}
+
+// IndicesGetTemplateResponse is the response of IndicesGetTemplateService.Do.
+type IndicesGetTemplateResponse struct {
+	Order    int                    `json:"order,omitempty"`
+	Template string                 `json:"template,omitempty"`
+	Settings map[string]interface{} `json:"settings,omitempty"`
+	Mappings map[string]interface{} `json:"mappings,omitempty"`
+	Aliases  map[string]interface{} `json:"aliases,omitempty"`
+}