streamlog

package
v0.15.4 Latest Latest
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Published: Jul 28, 2023 License: Apache-2.0 Imports: 14 Imported by: 6

Documentation

Overview

Package streamlog provides a non-blocking message broadcaster.

Index

Constants

View Source
const (
	// QueryLogFormatText is the format specifier for text querylog output
	QueryLogFormatText = "text"

	// QueryLogFormatJSON is the format specifier for json querylog output
	QueryLogFormatJSON = "json"
)

Variables

This section is empty.

Functions

func GetQueryLogFilterTag added in v0.15.0

func GetQueryLogFilterTag() string

func GetQueryLogFormat added in v0.15.0

func GetQueryLogFormat() string

func GetQueryLogRowThreshold added in v0.15.0

func GetQueryLogRowThreshold() uint64

func GetRedactDebugUIQueries added in v0.15.0

func GetRedactDebugUIQueries() bool

func SetQueryLogFilterTag added in v0.15.0

func SetQueryLogFilterTag(newQueryLogFilterTag string)

func SetQueryLogFormat added in v0.15.0

func SetQueryLogFormat(newQueryLogFormat string)

func SetQueryLogRowThreshold added in v0.15.0

func SetQueryLogRowThreshold(newQueryLogRowThreshold uint64)

func SetRedactDebugUIQueries added in v0.15.0

func SetRedactDebugUIQueries(newRedactDebugUIQueries bool)

func ShouldEmitLog

func ShouldEmitLog(sql string, rowsAffected, rowsReturned uint64) bool

ShouldEmitLog returns whether the log with the given SQL query should be emitted or filtered

Types

type Formatter

type Formatter interface {
	Logf(io.Writer, url.Values) error
}

Formatter is a simple interface for objects that expose a Format function as needed for streamlog.

type LogFormatter

type LogFormatter func(out io.Writer, params url.Values, message any) error

LogFormatter is the function signature used to format an arbitrary message for the given output writer.

func GetFormatter

func GetFormatter(logger *StreamLogger) LogFormatter

GetFormatter returns a formatter function for objects conforming to the Formatter interface

type StreamLogger

type StreamLogger struct {
	// contains filtered or unexported fields
}

StreamLogger is a non-blocking broadcaster of messages. Subscribers can use channels or HTTP.

func New

func New(name string, size int) *StreamLogger

New returns a new StreamLogger that can stream events to subscribers. The size parameter defines the channel size for the subscribers.

func (*StreamLogger) LogToFile

func (logger *StreamLogger) LogToFile(path string, logf LogFormatter) (chan any, error)

LogToFile starts logging to the specified file path and will reopen the file in response to SIGUSR2.

Returns the channel used for the subscription which can be used to close it.

func (*StreamLogger) Name

func (logger *StreamLogger) Name() string

Name returns the name of StreamLogger.

func (*StreamLogger) Send

func (logger *StreamLogger) Send(message any)

Send sends message to all the writers subscribed to logger. Calling Send does not block.

func (*StreamLogger) ServeLogs

func (logger *StreamLogger) ServeLogs(url string, logf LogFormatter)

ServeLogs registers the URL on which messages will be broadcast. It is safe to register multiple URLs for the same StreamLogger.

func (*StreamLogger) Subscribe

func (logger *StreamLogger) Subscribe(name string) chan any

Subscribe returns a channel which can be used to listen for messages.

func (*StreamLogger) Unsubscribe

func (logger *StreamLogger) Unsubscribe(ch chan any)

Unsubscribe removes the channel from the subscription.

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