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context.go
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context.go
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// Copyright (c) 2018 Palantir Technologies. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package metric1log
import (
"context"
wloginternal "github.com/palantir/witchcraft-go-logging/wlog/internal"
)
type metric1LogContextKeyType string
const contextKey = metric1LogContextKeyType(TypeValue)
// WithLogger returns a copy of the provided context with the provided Logger included as a value. This operation will
// replace any logger that was previously set on the context (along with all parameters that may have been set on the
// logger).
func WithLogger(ctx context.Context, logger Logger) context.Context {
return context.WithValue(ctx, contextKey, logger)
}
// FromContext returns the Logger stored in the provided context. If no logger is set on the context, returns the logger
// created by calling DefaultLogger.
func FromContext(ctx context.Context) Logger {
logger := loggerFromContext(ctx)
var params []Param
if uid := wloginternal.IDFromContext(ctx, wloginternal.UIDKey); uid != nil {
params = append(params, UID(*uid))
}
if sid := wloginternal.IDFromContext(ctx, wloginternal.SIDKey); sid != nil {
params = append(params, SID(*sid))
}
if tokenID := wloginternal.IDFromContext(ctx, wloginternal.TokenIDKey); tokenID != nil {
params = append(params, TokenID(*tokenID))
}
if orgID := wloginternal.IDFromContext(ctx, wloginternal.OrgIDKey); orgID != nil {
params = append(params, OrgID(*orgID))
}
return WithParams(logger, params...)
}
// loggerFromContext returns the logger stored in the provided context. If no logger is set on the context, returns the
// logger created by calling DefaultLogger.
func loggerFromContext(ctx context.Context) Logger {
if logger, ok := ctx.Value(contextKey).(Logger); ok {
return logger
}
return defaultLoggerCreator()
}