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_put_template.go

@@ -0,0 +1,178 @@
+// 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"
+
+	"gopkg.in/olivere/elastic.v3/uritemplates"
+)
+
+// IndicesPutTemplateService creates or updates index mappings.
+// See http://www.elasticsearch.org/guide/en/elasticsearch/reference/1.4/indices-templates.html.
+type IndicesPutTemplateService struct {
+	client        *Client
+	pretty        bool
+	name          string
+	order         interface{}
+	create        *bool
+	timeout       string
+	masterTimeout string
+	flatSettings  *bool
+	bodyJson      interface{}
+	bodyString    string
+}
+
+// NewIndicesPutTemplateService creates a new IndicesPutTemplateService.
+func NewIndicesPutTemplateService(client *Client) *IndicesPutTemplateService {
+	return &IndicesPutTemplateService{
+		client: client,
+	}
+}
+
+// Name is the name of the index template.
+func (s *IndicesPutTemplateService) Name(name string) *IndicesPutTemplateService {
+	s.name = name
+	return s
+}
+
+// Timeout is an explicit operation timeout.
+func (s *IndicesPutTemplateService) Timeout(timeout string) *IndicesPutTemplateService {
+	s.timeout = timeout
+	return s
+}
+
+// MasterTimeout specifies the timeout for connection to master.
+func (s *IndicesPutTemplateService) MasterTimeout(masterTimeout string) *IndicesPutTemplateService {
+	s.masterTimeout = masterTimeout
+	return s
+}
+
+// FlatSettings indicates whether to return settings in flat format (default: false).
+func (s *IndicesPutTemplateService) FlatSettings(flatSettings bool) *IndicesPutTemplateService {
+	s.flatSettings = &flatSettings
+	return s
+}
+
+// Order is the order for this template when merging multiple matching ones
+// (higher numbers are merged later, overriding the lower numbers).
+func (s *IndicesPutTemplateService) Order(order interface{}) *IndicesPutTemplateService {
+	s.order = order
+	return s
+}
+
+// Create indicates whether the index template should only be added if
+// new or can also replace an existing one.
+func (s *IndicesPutTemplateService) Create(create bool) *IndicesPutTemplateService {
+	s.create = &create
+	return s
+}
+
+// Pretty indicates that the JSON response be indented and human readable.
+func (s *IndicesPutTemplateService) Pretty(pretty bool) *IndicesPutTemplateService {
+	s.pretty = pretty
+	return s
+}
+
+// BodyJson is documented as: The template definition.
+func (s *IndicesPutTemplateService) BodyJson(body interface{}) *IndicesPutTemplateService {
+	s.bodyJson = body
+	return s
+}
+
+// BodyString is documented as: The template definition.
+func (s *IndicesPutTemplateService) BodyString(body string) *IndicesPutTemplateService {
+	s.bodyString = body
+	return s
+}
+
+// buildURL builds the URL for the operation.
+func (s *IndicesPutTemplateService) buildURL() (string, url.Values, error) {
+	// Build URL
+	path, err := uritemplates.Expand("/_template/{name}", map[string]string{
+		"name": s.name,
+	})
+	if err != nil {
+		return "", url.Values{}, err
+	}
+
+	// Add query string parameters
+	params := url.Values{}
+	if s.pretty {
+		params.Set("pretty", "1")
+	}
+	if s.order != nil {
+		params.Set("order", fmt.Sprintf("%v", s.order))
+	}
+	if s.create != nil {
+		params.Set("create", fmt.Sprintf("%v", *s.create))
+	}
+	if s.timeout != "" {
+		params.Set("timeout", s.timeout)
+	}
+	if s.masterTimeout != "" {
+		params.Set("master_timeout", s.masterTimeout)
+	}
+	if s.flatSettings != nil {
+		params.Set("flat_settings", fmt.Sprintf("%v", *s.flatSettings))
+	}
+	return path, params, nil
+}
+
+// Validate checks if the operation is valid.
+func (s *IndicesPutTemplateService) Validate() error {
+	var invalid []string
+	if s.name == "" {
+		invalid = append(invalid, "Name")
+	}
+	if s.bodyString == "" && s.bodyJson == nil {
+		invalid = append(invalid, "BodyJson")
+	}
+	if len(invalid) > 0 {
+		return fmt.Errorf("missing required fields: %v", invalid)
+	}
+	return nil
+}
+
+// Do executes the operation.
+func (s *IndicesPutTemplateService) Do() (*IndicesPutTemplateResponse, 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
+	var body interface{}
+	if s.bodyJson != nil {
+		body = s.bodyJson
+	} else {
+		body = s.bodyString
+	}
+
+	// Get HTTP response
+	res, err := s.client.PerformRequest("PUT", path, params, body)
+	if err != nil {
+		return nil, err
+	}
+
+	// Return operation response
+	ret := new(IndicesPutTemplateResponse)
+	if err := s.client.decoder.Decode(res.Body, ret); err != nil {
+		return nil, err
+	}
+	return ret, nil
+}
+
+// IndicesPutTemplateResponse is the response of IndicesPutTemplateService.Do.
+type IndicesPutTemplateResponse struct {
+	Acknowledged bool `json:"acknowledged,omitempty"`
+}