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57 lines
1.6 KiB
57 lines
1.6 KiB
package log
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import (
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"io"
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"sync"
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)
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const (
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// LogFormatPlain defines a logging format used for human-readable text-based
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// logging that is not structured. Typically, this format is used for development
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// and testing purposes.
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LogFormatPlain string = "plain"
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// LogFormatText defines a logging format used for human-readable text-based
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// logging that is not structured. Typically, this format is used for development
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// and testing purposes.
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LogFormatText string = "text"
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// LogFormatJSON defines a logging format for structured JSON-based logging
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// that is typically used in production environments, which can be sent to
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// logging facilities that support complex log parsing and querying.
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LogFormatJSON string = "json"
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// Supported loging levels
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LogLevelDebug = "debug"
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LogLevelInfo = "info"
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LogLevelWarn = "warn"
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LogLevelError = "error"
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)
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// Logger defines a generic logging interface compatible with Tendermint.
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type Logger interface {
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Debug(msg string, keyVals ...interface{})
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Info(msg string, keyVals ...interface{})
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Error(msg string, keyVals ...interface{})
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With(keyVals ...interface{}) Logger
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}
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// syncWriter wraps an io.Writer that can be used in a Logger that is safe for
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// concurrent use by multiple goroutines.
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type syncWriter struct {
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sync.Mutex
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io.Writer
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}
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func newSyncWriter(w io.Writer) io.Writer {
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return &syncWriter{Writer: w}
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}
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// Write writes p to the underlying io.Writer. If another write is already in
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// progress, the calling goroutine blocks until the syncWriter is available.
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func (w *syncWriter) Write(p []byte) (int, error) {
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w.Lock()
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defer w.Unlock()
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return w.Writer.Write(p)
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}
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