forked from uber-go/fx
/
console.go
106 lines (100 loc) · 3.56 KB
/
console.go
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// Copyright (c) 2021 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package fxevent
import (
"fmt"
"io"
"strings"
)
// ConsoleLogger is an Fx event logger that attempts to write human-readable
// messages to the console.
//
// Use this during development.
type ConsoleLogger struct {
W io.Writer
}
var _ Logger = (*ConsoleLogger)(nil)
func (l *ConsoleLogger) logf(msg string, args ...interface{}) {
fmt.Fprintf(l.W, "[Fx] "+msg+"\n", args...)
}
// LogEvent logs the given event to the provided Zap logger.
func (l *ConsoleLogger) LogEvent(event Event) {
switch e := event.(type) {
case *OnStartExecuting:
l.logf("HOOK OnStart\t\t%s executing (caller: %s)", e.FunctionName, e.CallerName)
case *OnStartExecuted:
if e.Err != nil {
l.logf("HOOK OnStart\t\t%s called by %s failed in %s: %v", e.FunctionName, e.CallerName, e.Runtime, e.Err)
} else {
l.logf("HOOK OnStart\t\t%s called by %s ran successfully in %s", e.FunctionName, e.CallerName, e.Runtime)
}
case *OnStopExecuting:
l.logf("HOOK OnStop\t\t%s executing (caller: %s)", e.FunctionName, e.CallerName)
case *OnStopExecuted:
if e.Err != nil {
l.logf("HOOK OnStop\t\t%s called by %s failed in %s: %v", e.FunctionName, e.CallerName, e.Runtime, e.Err)
} else {
l.logf("HOOK OnStop\t\t%s called by %s ran successfully in %s", e.FunctionName, e.CallerName, e.Runtime)
}
case *Supplied:
if e.Err != nil {
l.logf("ERROR\tFailed to supply %v: %v", e.TypeName, e.Err)
} else {
l.logf("SUPPLY\t%v", e.TypeName)
}
case *Provided:
for _, rtype := range e.OutputTypeNames {
l.logf("PROVIDE\t%v <= %v", rtype, e.ConstructorName)
}
if e.Err != nil {
l.logf("Error after options were applied: %v", e.Err)
}
case *Invoking:
l.logf("INVOKE\t\t%s", e.FunctionName)
case *Invoked:
if e.Err != nil {
l.logf("ERROR\t\tfx.Invoke(%v) called from:\n%+vFailed: %v", e.FunctionName, e.Trace, e.Err)
}
case *Stopping:
l.logf("%v", strings.ToUpper(e.Signal.String()))
case *Stopped:
if e.Err != nil {
l.logf("ERROR\t\tFailed to stop cleanly: %v", e.Err)
}
case *RollingBack:
l.logf("ERROR\t\tStart failed, rolling back: %v", e.StartErr)
case *RolledBack:
if e.Err != nil {
l.logf("ERROR\t\tCouldn't roll back cleanly: %v", e.Err)
}
case *Started:
if e.Err != nil {
l.logf("ERROR\t\tFailed to start: %v", e.Err)
} else {
l.logf("RUNNING")
}
case *LoggerInitialized:
if e.Err != nil {
l.logf("ERROR\t\tFailed to initialize custom logger: %+v", e.Err)
} else {
l.logf("LOGGER\tInitialized custom logger from %v", e.ConstructorName)
}
}
}