a2a8d54bb6
This change adds `access` format support for notifications to a Elasticsearch server, and it refactors `namespace` format support. In the case of `access` format, for each event in Minio, a JSON document is inserted into Elasticsearch with its timestamp set to the event's timestamp, and with the ID generated automatically by elasticsearch. No events are modified or deleted in this mode. In the case of `namespace` format, for each event in Minio, a JSON document is keyed together by the bucket and object name is updated in Elasticsearch. In the case of an object being created or over-written in Minio, a new document or an existing document is inserted into the Elasticsearch index. If an object is deleted in Minio, the corresponding document is deleted from the Elasticsearch index. Additionally, this change upgrades Elasticsearch support to the 5.x series. This is a breaking change, and users of previous elasticsearch versions should upgrade. Also updates documentation on Elasticsearch notification target usage and has a link to an elasticsearch upgrade guide. This is the last patch that finally resolves #3928.
62 lines
2.1 KiB
Go
62 lines
2.1 KiB
Go
// Copyright 2012-present Oliver Eilhard. All rights reserved.
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// Use of this source code is governed by a MIT-license.
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// See http://olivere.mit-license.org/license.txt for details.
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package elastic
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import (
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"net/http"
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"time"
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"golang.org/x/net/context"
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)
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// RetrierFunc specifies the signature of a Retry function.
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type RetrierFunc func(context.Context, int, *http.Request, *http.Response, error) (time.Duration, bool, error)
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// Retrier decides whether to retry a failed HTTP request with Elasticsearch.
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type Retrier interface {
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// Retry is called when a request has failed. It decides whether to retry
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// the call, how long to wait for the next call, or whether to return an
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// error (which will be returned to the service that started the HTTP
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// request in the first place).
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//
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// Callers may also use this to inspect the HTTP request/response and
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// the error that happened. Additional data can be passed through via
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// the context.
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Retry(ctx context.Context, retry int, req *http.Request, resp *http.Response, err error) (time.Duration, bool, error)
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}
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// -- StopRetrier --
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// StopRetrier is an implementation that does no retries.
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type StopRetrier struct {
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}
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// NewStopRetrier returns a retrier that does no retries.
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func NewStopRetrier() *StopRetrier {
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return &StopRetrier{}
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}
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// Retry does not retry.
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func (r *StopRetrier) Retry(ctx context.Context, retry int, req *http.Request, resp *http.Response, err error) (time.Duration, bool, error) {
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return 0, false, nil
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}
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// -- BackoffRetrier --
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// BackoffRetrier is an implementation that does nothing but return nil on Retry.
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type BackoffRetrier struct {
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backoff Backoff
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}
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// NewBackoffRetrier returns a retrier that uses the given backoff strategy.
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func NewBackoffRetrier(backoff Backoff) *BackoffRetrier {
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return &BackoffRetrier{backoff: backoff}
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}
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// Retry calls into the backoff strategy and its wait interval.
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func (r *BackoffRetrier) Retry(ctx context.Context, retry int, req *http.Request, resp *http.Response, err error) (time.Duration, bool, error) {
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wait, goahead := r.backoff.Next(retry)
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return wait, goahead, nil
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}
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