You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: logsink.go
    path of file: ./repos/juju/apiserver
    
    the code of the file until where you have to start completion: // Copyright 2015 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.

package apiserver

import (
	"io"
	"net/http"
	"strings"
	"sync"
	"time"

	"github.com/juju/clock"
	"github.com/juju/errors"
	"github.com/juju/loggo"
	"github.com/juju/version/v2"

	"github.com/juju/juju/apiserver/common"
	"github.com/juju/juju/apiserver/logsink"
	corelogger "github.com/juju/juju/core/logger"
	"github.com/juju/juju/rpc/params"
	"github.com/juju/juju/state"
	"github.com/juju/juju/worker/syslogger"
)

const (
	defaultLoggerBufferSize    = 1000
	defaultLoggerFlushInterval = 2 * time.Second
)

// RecordLogger
    
func (s *agentLoggingStrategy) init(ctxt httpContext, req *http.Request) error {
	st, entity, err := ctxt.stateForRequestAuthenticatedAgent(req)
	if err != nil {
		return errors.Trace(err)
	}
	// Note that this endpoint is agent-only. Thus the only
	// callers will necessarily provide their Juju version.
	//
	// This would be a problem if non-Juju clients could use
	// this endpoint since we require that the *Juju* version
	// be provided as part of the request. Any attempt to open
	// this endpoint to broader access must address this caveat
	// appropriately.
	ver, err := common.JujuClientVersionFromRequest(req)
	if err != nil {
		st.Release()
		return errors.Trace(err)
	}
	s.version = ver
	s.entity = entity.Tag().String()
	s.modelUUID = st.ModelUUID()
	s.recordLogger = s.apiServerLoggers.getLogger(st.State)
	s.releaser = func() {
		if removed := st.Release(); removed {
			s.apiServerLoggers.removeLogger(st.State)
		}
	}
	return nil
}