Golang Errorln Examples

Example #1

File: flags.go Project: expanse-project/go-expanse

// Setup initializes profiling and logging based on the CLI flags.
// It should be called as early as possible in the program.
func Setup(ctx *cli.Context) error {
	// logging
	glog.CopyStandardLogTo("INFO")
	glog.SetToStderr(true)

	// profiling, tracing
	runtime.MemProfileRate = ctx.GlobalInt(memprofilerateFlag.Name)
	Handler.SetBlockProfileRate(ctx.GlobalInt(blockprofilerateFlag.Name))
	if traceFile := ctx.GlobalString(traceFlag.Name); traceFile != "" {
		if err := Handler.StartGoTrace(traceFile); err != nil {
			return err
		}
	}
	if cpuFile := ctx.GlobalString(cpuprofileFlag.Name); cpuFile != "" {
		if err := Handler.StartCPUProfile(cpuFile); err != nil {
			return err
		}
	}

	// pprof server
	if ctx.GlobalBool(pprofFlag.Name) {
		address := fmt.Sprintf("127.0.0.1:%d", ctx.GlobalInt(pprofPortFlag.Name))
		go func() {
			glog.V(logger.Info).Infof("starting pprof server at http://%s/debug/pprof", address)
			glog.Errorln(http.ListenAndServe(address, nil))
		}()
	}
	return nil
}

Example #2

File: main.go Project: expanse-project/go-expanse

func runSuite(test, file string) {
	var tests []string

	if test == defaultTest {
		tests = allTests
	} else {
		tests = []string{test}
	}

	for _, curTest := range tests {
		glog.Infoln("runSuite", curTest, file)
		var err error
		var files []string
		if test == defaultTest {
			// check if we have an explicit directory mapping for the test
			if _, ok := testDirMapping[curTest]; ok {
				files, err = getFiles(filepath.Join(file, testDirMapping[curTest]))
			} else {
				// otherwise assume test name
				files, err = getFiles(filepath.Join(file, curTest))
			}
		} else {
			files, err = getFiles(file)
		}
		if err != nil {
			glog.Fatalln(err)
		}

		if len(files) == 0 {
			glog.Warningln("No files matched path")
		}
		for _, curFile := range files {
			// Skip blank entries
			if len(curFile) == 0 {
				continue
			}

			r, err := os.Open(curFile)
			if err != nil {
				glog.Fatalln(err)
			}
			defer r.Close()

			err = runTestWithReader(curTest, r)
			if err != nil {
				if continueOnError {
					glog.Errorln(err)
				} else {
					glog.Fatalln(err)
				}
			}
		}
	}
}

Example #3

File: server.go Project: expanse-project/go-expanse

// serveRequest will reads requests from the codec, calls the RPC callback and
// writes the response to the given codec.
//
// If singleShot is true it will process a single request, otherwise it will handle
// requests until the codec returns an error when reading a request (in most cases
// an EOF). It executes requests in parallel when singleShot is false.
func (s *Server) serveRequest(codec ServerCodec, singleShot bool, options CodecOption) error {
	defer func() {
		if err := recover(); err != nil {
			const size = 64 << 10
			buf := make([]byte, size)
			buf = buf[:runtime.Stack(buf, false)]
			glog.Errorln(string(buf))
		}

		s.codecsMu.Lock()
		s.codecs.Remove(codec)
		s.codecsMu.Unlock()

		return
	}()

	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	// if the codec supports notification include a notifier that callbacks can use
	// to send notification to clients. It is thight to the codec/connection. If the
	// connection is closed the notifier will stop and cancels all active subscriptions.
	if options&OptionSubscriptions == OptionSubscriptions {
		ctx = context.WithValue(ctx, notifierKey{}, newBufferedNotifier(codec, notificationBufferSize))
	}
	s.codecsMu.Lock()
	if atomic.LoadInt32(&s.run) != 1 { // server stopped
		s.codecsMu.Unlock()
		return &shutdownError{}
	}
	s.codecs.Add(codec)
	s.codecsMu.Unlock()

	// test if the server is ordered to stop
	for atomic.LoadInt32(&s.run) == 1 {
		reqs, batch, err := s.readRequest(codec)
		if err != nil {
			glog.V(logger.Debug).Infof("%v\n", err)
			codec.Write(codec.CreateErrorResponse(nil, err))
			return nil
		}

		// check if server is ordered to shutdown and return an error
		// telling the client that his request failed.
		if atomic.LoadInt32(&s.run) != 1 {
			err = &shutdownError{}
			if batch {
				resps := make([]interface{}, len(reqs))
				for i, r := range reqs {
					resps[i] = codec.CreateErrorResponse(&r.id, err)
				}
				codec.Write(resps)
			} else {
				codec.Write(codec.CreateErrorResponse(&reqs[0].id, err))
			}
			return nil
		}

		if singleShot && batch {
			s.execBatch(ctx, codec, reqs)
			return nil
		} else if singleShot && !batch {
			s.exec(ctx, codec, reqs[0])
			return nil
		} else if !singleShot && batch {
			go s.execBatch(ctx, codec, reqs)
		} else {
			go s.exec(ctx, codec, reqs[0])
		}
	}

	return nil
}