// Use adds a default go-logging logger to the context.
func (lc *LoggerConfig) Use(c context.Context) context.Context {
return logging.SetFactory(c, func(c context.Context) logging.Logger {
l := lc.getImpl()
l.c = c
return l
})
}
// Use adds a memory backed Logger to Context, with concrete type
// *MemLogger. Casting to the concrete type can be used to inspect the
// log output after running a test case, for example.
func Use(c context.Context) context.Context {
lock := sync.Mutex{}
data := []LogEntry{}
return logging.SetFactory(c, func(ic context.Context) logging.Logger {
return &MemLogger{&lock, &data, logging.GetFields(ic)}
})
}
// Use installs a cloud logging Logger into the supplied Context.
func Use(ctx context.Context, config Config, client cloudlogging.Client) context.Context {
counter := &atomicCounter{}
return logging.SetFactory(ctx, func(factoryCtx context.Context) logging.Logger {
return &boundCloudLogger{
Config: &config,
ctx: factoryCtx,
client: client,
index: counter.next(),
}
})
}
// getLogger chooses a base logger instance to use.
//
// If we're running on GCE, we will use a "cloud logging" logger; otherwise,
// we will use a console logger.
//
// The returned function should be called on application termination to flush
// the logger.
func (c *loggerConfig) use(ctx context.Context, client *http.Client) (context.Context, func(), error) {
if c.projectName == "" {
return ctx, nil, errors.New("logging: You must supply a project name")
}
if c.resourceType == "" {
return ctx, nil, errors.New("logging: You must supply a resource type")
}
if c.logsID == "" {
return ctx, nil, errors.New("logging: You must supply a logs ID")
}
configCopy := *c
configCopy.labels = make(map[string]string)
for k, v := range c.labels {
configCopy.labels[k] = v
}
if c.resourceType != "" {
configCopy.labels["compute.googleapis.com/resource_type"] = c.resourceType
}
if c.resourceID != "" {
configCopy.labels["compute.googleapis.com/resource_id"] = c.resourceID
}
if configCopy.sessionID == "" {
sessionID := make([]byte, loggingSessionIDSize)
if _, err := rand.Read(sessionID); err != nil {
return ctx, nil, err
}
configCopy.sessionID = base64.URLEncoding.EncodeToString(sessionID)
}
// Load GCE credentials for cloud logger.
service, err := cloudlog.New(client)
if err != nil {
return ctx, nil, err
}
clog := newCloudLogging(ctx, &configCopy, service)
ctx = log.SetFactory(ctx, func(c context.Context) log.Logger {
return clog.bind(c)
})
return ctx, clog.finish, nil
}
// useLogging adds a logging.Logger implementation to the context which logs to
// appengine's log handler.
func useLogging(c context.Context) context.Context {
return logging.SetFactory(c, func(ic context.Context) logging.Logger {
return &loggerImpl{AEContext(ic), ic}
})
}
// Use adds a logging.Logger implementation to the context which logs to
// appengine's log handler.
func Use(c context.Context, gaeCtx appengine.Context) context.Context {
return logging.SetFactory(c, func(ic context.Context) logging.Logger {
return &gaeLoggerImpl{gaeCtx, ic}
})
}
