package once

import (
	"context"
	"sync"
	"sync/atomic"
)

// Inspired from Golang sync.Once but it is only marked
// initialized when the provided function returns nil.

// Init represents the structure.
type Init struct {
	done uint32
	m    sync.Mutex
}

// Do is similar to sync.Once.Do - makes one successful
// call to the function. ie, it invokes the function
// if it is not successful yet.

	"fmt"

	"github.com/tinylib/msgp/msgp"
)

// xlMetaInlineData is serialized data in [string][]byte pairs.
type xlMetaInlineData []byte

// xlMetaInlineDataVer indicates the version of the inline data structure.
const xlMetaInlineDataVer = 1

// versionOK returns whether the version is ok.
func (x xlMetaInlineData) versionOK() bool {
	if len(x) == 0 {
		return true
	}
	return x[0] > 0 && x[0] <= xlMetaInlineDataVer

### Response

If the token is valid and access is approved, the plugin must return a `200` (OK) HTTP status code.

A `200 OK` Response should have `application/json` content-type and body with the following structure:

```json
{
    "user": <string>,
    "maxValiditySeconds": <integer>,
    "claims": <key-value-pairs>
}
```

		stsLogIf(ctx, err, logger.ErrorKind)
	}
	encodedErrorResponse := encodeResponse(stsErrorResponse)
	writeResponse(w, stsErr.HTTPStatusCode, encodedErrorResponse, mimeXML)
}

// STSError structure
type STSError struct {
	Code           string
	Description    string
	HTTPStatusCode int
}

// STSErrorResponse - error response format
type STSErrorResponse struct {

// GetTagsMap - returns the user defined tags in a map structure
func (r *ReqInfo) GetTagsMap() map[string]interface{} {
	if r == nil {
		return nil
	}
	r.RLock()
	defer r.RUnlock()
	m := make(map[string]interface{}, len(r.tags))
	for _, t := range r.tags {
		m[t.Key] = t.Val
	}
	return m
}

// PopulateTagsMap - returns the user defined tags in a map structure

	"time"

	"github.com/minio/pkg/v2/logger/message/audit"

	"github.com/minio/minio/internal/handlers"
	xhttp "github.com/minio/minio/internal/http"
)

// Version - represents the current version of audit log structure.
const Version = "1"

// NewEntry - constructs an audit entry object with some fields filled
func NewEntry(deploymentID string) audit.Entry {
	return audit.Entry{
		Version:      Version,

func (c *Target) String() string {
	return "console"
}

// Send log message 'e' to console
func (c *Target) Send(e interface{}) error {
	entry, ok := e.(log.Entry)
	if !ok {
		return fmt.Errorf("Uexpected log entry structure %#v", e)
	}
	if logger.IsJSON() {
		logJSON, err := json.Marshal(&entry)
		if err != nil {
			return err
		}
		fmt.Fprintln(c.output, string(logJSON))
		return nil
	}

	return signedHeaders, ErrNone
}

// signValues data type represents structured form of AWS Signature V4 header.
type signValues struct {
	Credential    credentialHeader
	SignedHeaders []string
	Signature     string
}

// preSignValues data type represents structured form of AWS Signature V4 query string.
type preSignValues struct {
	signValues
	Date    time.Time

well defined data structure. To understand `xl.meta` here are the few things to start with

`xl.meta` carries first 8 bytes an XL header which describes the current format and the format version,
allowing the unmarshaller's to automatically use the right data structures to parse the subsequent content in the stream.

### v1.0

| Entry     | Encoding    | Content

- Retrying a failed job automatically driven by user input
- Monitoring job progress in real-time
- Send notifications upon completion or failure to user configured target

Following YAML describes the structure of a replication job, each value is documented and self-describing.

```yaml
replicate:
  apiVersion: v1
  # source of the objects to be replicated
  source:
	type: TYPE # valid values are "minio"
	bucket: BUCKET