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// Copyright (C) 2014 Space Monkey, Inc.
//
// 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 spacelog
import (
"text/template"
)
// Handler is an interface that knows how to process log events. This is the
// basic interface type for building a logging system. If you want to route
// structured log data somewhere, you would implement this interface.
type Handler interface {
// Log is called for every message. if calldepth is negative, caller
// information is missing
Log(logger_name string, level LogLevel, msg string, calldepth int)
// These two calls are expected to be no-ops on non-text-output handlers
SetTextTemplate(t *template.Template)
SetTextOutput(output TextOutput)
}
// HandlerFunc is a type to make implementation of the Handler interface easier
type HandlerFunc func(logger_name string, level LogLevel, msg string,
calldepth int)
// Log simply calls f(logger_name, level, msg, calldepth)
func (f HandlerFunc) Log(logger_name string, level LogLevel, msg string,
calldepth int) {
f(logger_name, level, msg, calldepth)
}
// SetTextTemplate is a no-op
func (HandlerFunc) SetTextTemplate(t *template.Template) {}
// SetTextOutput is a no-op
func (HandlerFunc) SetTextOutput(output TextOutput) {}
var (
defaultHandler = NewTextHandler(StdlibTemplate,
&StdlibOutput{})
)
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