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137 lines
3.7 KiB
Go
137 lines
3.7 KiB
Go
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// Copyright 2016 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package logging_test
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import (
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"fmt"
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"os"
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"cloud.google.com/go/logging"
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"golang.org/x/net/context"
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)
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func ExampleNewClient() {
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ctx := context.Background()
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client, err := logging.NewClient(ctx, "my-project")
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if err != nil {
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// TODO: Handle error.
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}
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// Use client to manage logs, metrics and sinks.
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// Close the client when finished.
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if err := client.Close(); err != nil {
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// TODO: Handle error.
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}
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}
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func ExampleClient_Ping() {
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ctx := context.Background()
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client, err := logging.NewClient(ctx, "my-project")
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if err != nil {
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// TODO: Handle error.
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}
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if err := client.Ping(ctx); err != nil {
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// TODO: Handle error.
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}
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}
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// Although Logger.Flush and Client.Close both return errors, they don't tell you
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// whether the errors were frequent or significant. For most programs, it doesn't
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// matter if there were a few errors while writing logs, although if those few errors
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// indicated a bug in your program, you might want to know about them. The best way
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// to handle errors is by setting the OnError function. If it runs quickly, it will
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// see every error generated during logging.
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func ExampleNewClient_errorFunc() {
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ctx := context.Background()
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client, err := logging.NewClient(ctx, "my-project")
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if err != nil {
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// TODO: Handle error.
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}
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// Print all errors to stdout, and count them. Multiple calls to the OnError
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// function never happen concurrently, so there is no need for locking nErrs,
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// provided you don't read it until after the logging client is closed.
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var nErrs int
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client.OnError = func(e error) {
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fmt.Fprintf(os.Stdout, "logging: %v", e)
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nErrs++
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}
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// Use client to manage logs, metrics and sinks.
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// Close the client when finished.
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if err := client.Close(); err != nil {
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// TODO: Handle error.
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}
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fmt.Printf("saw %d errors\n", nErrs)
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}
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func ExampleClient_Logger() {
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ctx := context.Background()
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client, err := logging.NewClient(ctx, "my-project")
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if err != nil {
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// TODO: Handle error.
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}
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lg := client.Logger("my-log")
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_ = lg // TODO: use the Logger.
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}
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func ExampleLogger_LogSync() {
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ctx := context.Background()
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client, err := logging.NewClient(ctx, "my-project")
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if err != nil {
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// TODO: Handle error.
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}
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lg := client.Logger("my-log")
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err = lg.LogSync(ctx, logging.Entry{Payload: "red alert"})
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if err != nil {
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// TODO: Handle error.
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}
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}
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func ExampleLogger_Log() {
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ctx := context.Background()
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client, err := logging.NewClient(ctx, "my-project")
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if err != nil {
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// TODO: Handle error.
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}
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lg := client.Logger("my-log")
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lg.Log(logging.Entry{Payload: "something happened"})
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}
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func ExampleLogger_Flush() {
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ctx := context.Background()
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client, err := logging.NewClient(ctx, "my-project")
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if err != nil {
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// TODO: Handle error.
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}
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lg := client.Logger("my-log")
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lg.Log(logging.Entry{Payload: "something happened"})
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lg.Flush()
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}
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func ExampleLogger_StandardLogger() {
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ctx := context.Background()
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client, err := logging.NewClient(ctx, "my-project")
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if err != nil {
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// TODO: Handle error.
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}
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lg := client.Logger("my-log")
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slg := lg.StandardLogger(logging.Info)
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slg.Println("an informative message")
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}
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func ExampleParseSeverity() {
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sev := logging.ParseSeverity("ALERT")
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fmt.Println(sev)
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// Output: Alert
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}
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