Golang loggerutil.FatalWithMessage函數代碼示例

func main() {
	flag.Parse()

	if minutesBetweenRuns == 0 {
		arv, err := arvadosclient.MakeArvadosClient()
		if err != nil {
			loggerutil.FatalWithMessage(arvLogger, fmt.Sprintf("Error making arvados client: %v", err))
		}
		err = singlerun(arv)
		if err != nil {
			loggerutil.FatalWithMessage(arvLogger, fmt.Sprintf("singlerun: %v", err))
		}
	} else {
		waitTime := time.Minute * time.Duration(minutesBetweenRuns)
		for {
			log.Println("Beginning Run")
			arv, err := arvadosclient.MakeArvadosClient()
			if err != nil {
				loggerutil.FatalWithMessage(arvLogger, fmt.Sprintf("Error making arvados client: %v", err))
			}
			err = singlerun(arv)
			if err != nil {
				log.Printf("singlerun: %v", err)
			}
			log.Printf("Sleeping for %d minutes", minutesBetweenRuns)
			time.Sleep(waitTime)
		}
	}
}

// ReadData reads data that we've written to a file.
//
// This is useful for development, so that we don't need to read all
// our data from the network every time we tweak something.
//
// This should not be used outside of development, since you'll be
// working with stale data.
func ReadData(arvLogger *logger.Logger,
	readCollections *collection.ReadCollections,
	keepServerInfo *keep.ReadServers) {
	if readDataFrom == "" {
		loggerutil.FatalWithMessage(arvLogger,
			"ReadData() called with empty filename.")
	} else {
		summaryFile, err := os.Open(readDataFrom)
		if err != nil {
			loggerutil.FatalWithMessage(arvLogger,
				fmt.Sprintf("Failed to open %s: %v", readDataFrom, err))
		}
		defer summaryFile.Close()

		dec := gob.NewDecoder(summaryFile)
		data := serializedData{}
		err = dec.Decode(&data)
		if err != nil {
			loggerutil.FatalWithMessage(arvLogger,
				fmt.Sprintf("Failed to read summary data: %v", err))
		}

		// re-summarize data, so that we can update our summarizing
		// functions without needing to do all our network i/o
		data.ReadCollections.Summarize(arvLogger)
		data.KeepServerInfo.Summarize(arvLogger)

		*readCollections = data.ReadCollections
		*keepServerInfo = data.KeepServerInfo
		log.Printf("Read summary data from: %s", readDataFrom)
	}
}

// MaybeWriteData writes data we've read to a file.
//
// This is useful for development, so that we don't need to read all
// our data from the network every time we tweak something.
//
// This should not be used outside of development, since you'll be
// working with stale data.
func MaybeWriteData(arvLogger *logger.Logger,
	readCollections collection.ReadCollections,
	keepServerInfo keep.ReadServers) bool {
	if writeDataTo == "" {
		return false
	}
	summaryFile, err := os.Create(writeDataTo)
	if err != nil {
		loggerutil.FatalWithMessage(arvLogger,
			fmt.Sprintf("Failed to open %s: %v", writeDataTo, err))
	}
	defer summaryFile.Close()

	enc := gob.NewEncoder(summaryFile)
	data := serializedData{
		ReadCollections: readCollections,
		KeepServerInfo:  keepServerInfo}
	err = enc.Encode(data)
	if err != nil {
		loggerutil.FatalWithMessage(arvLogger,
			fmt.Sprintf("Failed to write summary data: %v", err))
	}
	log.Printf("Wrote summary data to: %s", writeDataTo)
	return true
}

func GetServerStatus(arvLogger *logger.Logger,
	keepServer ServerAddress,
	client http.Client) {
	url := fmt.Sprintf("http://%s:%d/status.json",
		keepServer.Host,
		keepServer.Port)

	if arvLogger != nil {
		now := time.Now()
		arvLogger.Update(func(p map[string]interface{}, e map[string]interface{}) {
			keepInfo := logger.GetOrCreateMap(p, "keep_info")
			serverInfo := make(map[string]interface{})
			serverInfo["status_request_sent_at"] = now
			serverInfo["host"] = keepServer.Host
			serverInfo["port"] = keepServer.Port

			keepInfo[keepServer.Uuid] = serverInfo
		})
	}

	resp, err := client.Get(url)
	if err != nil {
		loggerutil.FatalWithMessage(arvLogger,
			fmt.Sprintf("Error getting keep status from %s: %v", url, err))
	} else if resp.StatusCode != 200 {
		loggerutil.FatalWithMessage(arvLogger,
			fmt.Sprintf("Received error code %d in response to request "+
				"for %s status: %s",
				resp.StatusCode, url, resp.Status))
	}

	var keepStatus map[string]interface{}
	decoder := json.NewDecoder(resp.Body)
	decoder.UseNumber()
	err = decoder.Decode(&keepStatus)
	if err != nil {
		loggerutil.FatalWithMessage(arvLogger,
			fmt.Sprintf("Error decoding keep status from %s: %v", url, err))
	}

	if arvLogger != nil {
		now := time.Now()
		arvLogger.Update(func(p map[string]interface{}, e map[string]interface{}) {
			keepInfo := logger.GetOrCreateMap(p, "keep_info")
			serverInfo := keepInfo[keepServer.Uuid].(map[string]interface{})
			serverInfo["status_response_processed_at"] = now
			serverInfo["status"] = keepStatus
		})
	}
}

func GetDataManagerToken(arvLogger *logger.Logger) string {
	readDataManagerToken := func() {
		if dataManagerTokenFile == "" {
			flag.Usage()
			loggerutil.FatalWithMessage(arvLogger,
				"Data Manager Token needed, but data manager token file not specified.")
		} else {
			rawRead, err := ioutil.ReadFile(dataManagerTokenFile)
			if err != nil {
				loggerutil.FatalWithMessage(arvLogger,
					fmt.Sprintf("Unexpected error reading token file %s: %v",
						dataManagerTokenFile,
						err))
			}
			dataManagerToken = strings.TrimSpace(string(rawRead))
		}
	}

	dataManagerTokenFileReadOnce.Do(readDataManagerToken)
	return dataManagerToken
}

// WritePullLists writes each pull list to a file.
// The filename is based on the hostname.
//
// This is just a hack for prototyping, it is not expected to be used
// in production.
func WritePullLists(arvLogger *logger.Logger,
	pullLists map[string]PullList) {
	r := strings.NewReplacer(":", ".")
	for host, list := range pullLists {
		filename := fmt.Sprintf("pull_list.%s", r.Replace(RemoveProtocolPrefix(host)))
		pullListFile, err := os.Create(filename)
		if err != nil {
			loggerutil.FatalWithMessage(arvLogger,
				fmt.Sprintf("Failed to open %s: %v", filename, err))
		}
		defer pullListFile.Close()

		enc := json.NewEncoder(pullListFile)
		err = enc.Encode(list)
		if err != nil {
			loggerutil.FatalWithMessage(arvLogger,
				fmt.Sprintf("Failed to write pull list to %s: %v", filename, err))
		}
		log.Printf("Wrote pull list to %s.", filename)
	}
}

func GetServerContents(arvLogger *logger.Logger,
	keepServer ServerAddress,
	client http.Client) (response ServerResponse) {

	GetServerStatus(arvLogger, keepServer, client)

	req := CreateIndexRequest(arvLogger, keepServer)
	resp, err := client.Do(req)
	if err != nil {
		loggerutil.FatalWithMessage(arvLogger,
			fmt.Sprintf("Error fetching %s: %v. Response was %+v",
				req.URL.String(),
				err,
				resp))
	}

	return ReadServerResponse(arvLogger, keepServer, resp)
}

func CreateIndexRequest(arvLogger *logger.Logger,
	keepServer ServerAddress) (req *http.Request) {
	url := fmt.Sprintf("http://%s:%d/index", keepServer.Host, keepServer.Port)
	log.Println("About to fetch keep server contents from " + url)

	if arvLogger != nil {
		now := time.Now()
		arvLogger.Update(func(p map[string]interface{}, e map[string]interface{}) {
			keepInfo := logger.GetOrCreateMap(p, "keep_info")
			serverInfo := keepInfo[keepServer.Uuid].(map[string]interface{})
			serverInfo["index_request_sent_at"] = now
		})
	}

	req, err := http.NewRequest("GET", url, nil)
	if err != nil {
		loggerutil.FatalWithMessage(arvLogger,
			fmt.Sprintf("Error building http request for %s: %v", url, err))
	}

	req.Header.Add("Authorization",
		fmt.Sprintf("OAuth2 %s", GetDataManagerToken(arvLogger)))
	return
}

func ReadServerResponse(arvLogger *logger.Logger,
	keepServer ServerAddress,
	resp *http.Response) (response ServerResponse) {

	if resp.StatusCode != 200 {
		loggerutil.FatalWithMessage(arvLogger,
			fmt.Sprintf("Received error code %d in response to request "+
				"for %s index: %s",
				resp.StatusCode, keepServer.String(), resp.Status))
	}

	if arvLogger != nil {
		now := time.Now()
		arvLogger.Update(func(p map[string]interface{}, e map[string]interface{}) {
			keepInfo := logger.GetOrCreateMap(p, "keep_info")
			serverInfo := keepInfo[keepServer.Uuid].(map[string]interface{})
			serverInfo["index_response_received_at"] = now
		})
	}

	response.Address = keepServer
	response.Contents.BlockDigestToInfo =
		make(map[blockdigest.DigestWithSize]BlockInfo)
	reader := bufio.NewReader(resp.Body)
	numLines, numDuplicates, numSizeDisagreements := 0, 0, 0
	for {
		numLines++
		line, err := reader.ReadString('\n')
		if err == io.EOF {
			loggerutil.FatalWithMessage(arvLogger,
				fmt.Sprintf("Index from %s truncated at line %d",
					keepServer.String(), numLines))
		} else if err != nil {
			loggerutil.FatalWithMessage(arvLogger,
				fmt.Sprintf("Error reading index response from %s at line %d: %v",
					keepServer.String(), numLines, err))
		}
		if line == "\n" {
			if _, err := reader.Peek(1); err == nil {
				extra, _ := reader.ReadString('\n')
				loggerutil.FatalWithMessage(arvLogger,
					fmt.Sprintf("Index from %s had trailing data at line %d after EOF marker: %s",
						keepServer.String(), numLines+1, extra))
			} else if err != io.EOF {
				loggerutil.FatalWithMessage(arvLogger,
					fmt.Sprintf("Index from %s had read error after EOF marker at line %d: %v",
						keepServer.String(), numLines, err))
			}
			numLines--
			break
		}
		blockInfo, err := parseBlockInfoFromIndexLine(line)
		if err != nil {
			loggerutil.FatalWithMessage(arvLogger,
				fmt.Sprintf("Error parsing BlockInfo from index line "+
					"received from %s: %v",
					keepServer.String(),
					err))
		}

		if storedBlock, ok := response.Contents.BlockDigestToInfo[blockInfo.Digest]; ok {
			// This server returned multiple lines containing the same block digest.
			numDuplicates += 1
			// Keep the block that's newer.
			if storedBlock.Mtime < blockInfo.Mtime {
				response.Contents.BlockDigestToInfo[blockInfo.Digest] = blockInfo
			}
		} else {
			response.Contents.BlockDigestToInfo[blockInfo.Digest] = blockInfo
		}
	}

	log.Printf("%s index contained %d lines with %d duplicates with "+
		"%d size disagreements",
		keepServer.String(),
		numLines,
		numDuplicates,
		numSizeDisagreements)

	if arvLogger != nil {
		now := time.Now()
		arvLogger.Update(func(p map[string]interface{}, e map[string]interface{}) {
			keepInfo := logger.GetOrCreateMap(p, "keep_info")
			serverInfo := keepInfo[keepServer.Uuid].(map[string]interface{})

			serverInfo["processing_finished_at"] = now
			serverInfo["lines_received"] = numLines
			serverInfo["duplicates_seen"] = numDuplicates
			serverInfo["size_disagreements_seen"] = numSizeDisagreements
		})
	}
	resp.Body.Close()
	return
}

func GetKeepServers(params GetKeepServersParams) (results ReadServers) {
	if &params.Client == nil {
		log.Fatalf("params.Client passed to GetKeepServers() should " +
			"contain a valid ArvadosClient, but instead it is nil.")
	}

	sdkParams := arvadosclient.Dict{
		"filters": [][]string{[]string{"service_type", "=", "disk"}},
	}
	if params.Limit > 0 {
		sdkParams["limit"] = params.Limit
	}

	var sdkResponse KeepServiceList
	err := params.Client.List("keep_services", sdkParams, &sdkResponse)

	if err != nil {
		loggerutil.FatalWithMessage(params.Logger,
			fmt.Sprintf("Error requesting keep disks from API server: %v", err))
	}

	if params.Logger != nil {
		params.Logger.Update(func(p map[string]interface{}, e map[string]interface{}) {
			keepInfo := logger.GetOrCreateMap(p, "keep_info")
			keepInfo["num_keep_servers_available"] = sdkResponse.ItemsAvailable
			keepInfo["num_keep_servers_received"] = len(sdkResponse.KeepServers)
			keepInfo["keep_servers"] = sdkResponse.KeepServers
		})
	}

	log.Printf("Received keep services list: %+v", sdkResponse)

	if len(sdkResponse.KeepServers) < sdkResponse.ItemsAvailable {
		loggerutil.FatalWithMessage(params.Logger,
			fmt.Sprintf("Did not receive all available keep servers: %+v", sdkResponse))
	}

	results.KeepServerIndexToAddress = sdkResponse.KeepServers
	results.KeepServerAddressToIndex = make(map[ServerAddress]int)
	for i, address := range results.KeepServerIndexToAddress {
		results.KeepServerAddressToIndex[address] = i
	}

	log.Printf("Got Server Addresses: %v", results)

	// This is safe for concurrent use
	client := http.Client{}

	// Send off all the index requests concurrently
	responseChan := make(chan ServerResponse)
	for _, keepServer := range sdkResponse.KeepServers {
		// The above keepsServer variable is reused for each iteration, so
		// it would be shared across all goroutines. This would result in
		// us querying one server n times instead of n different servers
		// as we intended. To avoid this we add it as an explicit
		// parameter which gets copied. This bug and solution is described
		// in https://golang.org/doc/effective_go.html#channels
		go func(keepServer ServerAddress) {
			responseChan <- GetServerContents(params.Logger,
				keepServer,
				client)
		}(keepServer)
	}

	results.ServerToContents = make(map[ServerAddress]ServerContents)
	results.BlockToServers = make(map[blockdigest.DigestWithSize][]BlockServerInfo)

	// Read all the responses
	for i := range sdkResponse.KeepServers {
		_ = i // Here to prevent go from complaining.
		response := <-responseChan
		log.Printf("Received channel response from %v containing %d files",
			response.Address,
			len(response.Contents.BlockDigestToInfo))
		results.ServerToContents[response.Address] = response.Contents
		serverIndex := results.KeepServerAddressToIndex[response.Address]
		for _, blockInfo := range response.Contents.BlockDigestToInfo {
			results.BlockToServers[blockInfo.Digest] = append(
				results.BlockToServers[blockInfo.Digest],
				BlockServerInfo{ServerIndex: serverIndex,
					Mtime: blockInfo.Mtime})
		}
	}
	return
}

// ProcessCollections read from api server
func ProcessCollections(arvLogger *logger.Logger,
	receivedCollections []SdkCollectionInfo,
	defaultReplicationLevel int,
	UUIDToCollection map[string]Collection) (latestModificationDate time.Time) {
	for _, sdkCollection := range receivedCollections {
		collection := Collection{UUID: StrCopy(sdkCollection.UUID),
			OwnerUUID:         StrCopy(sdkCollection.OwnerUUID),
			ReplicationLevel:  sdkCollection.Redundancy,
			BlockDigestToSize: make(map[blockdigest.BlockDigest]int)}

		if sdkCollection.ModifiedAt.IsZero() {
			loggerutil.FatalWithMessage(arvLogger,
				fmt.Sprintf(
					"Arvados SDK collection returned with unexpected zero "+
						"modification date. This probably means that either we failed to "+
						"parse the modification date or the API server has changed how "+
						"it returns modification dates: %+v",
					collection))
		}

		if sdkCollection.ModifiedAt.After(latestModificationDate) {
			latestModificationDate = sdkCollection.ModifiedAt
		}

		if collection.ReplicationLevel == 0 {
			collection.ReplicationLevel = defaultReplicationLevel
		}

		manifest := manifest.Manifest{sdkCollection.ManifestText}
		manifestSize := uint64(len(sdkCollection.ManifestText))

		if _, alreadySeen := UUIDToCollection[collection.UUID]; !alreadySeen {
			totalManifestSize += manifestSize
		}
		if manifestSize > maxManifestSize {
			maxManifestSize = manifestSize
		}

		blockChannel := manifest.BlockIterWithDuplicates()
		for block := range blockChannel {
			if storedSize, stored := collection.BlockDigestToSize[block.Digest]; stored && storedSize != block.Size {
				message := fmt.Sprintf(
					"Collection %s contains multiple sizes (%d and %d) for block %s",
					collection.UUID,
					storedSize,
					block.Size,
					block.Digest)
				loggerutil.FatalWithMessage(arvLogger, message)
			}
			collection.BlockDigestToSize[block.Digest] = block.Size
		}
		collection.TotalSize = 0
		for _, size := range collection.BlockDigestToSize {
			collection.TotalSize += size
		}
		UUIDToCollection[collection.UUID] = collection

		// Clear out all the manifest strings that we don't need anymore.
		// These hopefully form the bulk of our memory usage.
		manifest.Text = ""
		sdkCollection.ManifestText = ""
	}

	return
}

// GetCollections gets collections from api
func GetCollections(params GetCollectionsParams) (results ReadCollections) {
	if &params.Client == nil {
		log.Fatalf("params.Client passed to GetCollections() should " +
			"contain a valid ArvadosClient, but instead it is nil.")
	}

	fieldsWanted := []string{"manifest_text",
		"owner_uuid",
		"uuid",
		"redundancy",
		"modified_at"}

	sdkParams := arvadosclient.Dict{
		"select":  fieldsWanted,
		"order":   []string{"modified_at ASC"},
		"filters": [][]string{[]string{"modified_at", ">=", "1900-01-01T00:00:00Z"}}}

	if params.BatchSize > 0 {
		sdkParams["limit"] = params.BatchSize
	}

	var defaultReplicationLevel int
	{
		value, err := params.Client.Discovery("defaultCollectionReplication")
		if err != nil {
			loggerutil.FatalWithMessage(params.Logger,
				fmt.Sprintf("Error querying default collection replication: %v", err))
		}

		defaultReplicationLevel = int(value.(float64))
		if defaultReplicationLevel <= 0 {
			loggerutil.FatalWithMessage(params.Logger,
				fmt.Sprintf("Default collection replication returned by arvados SDK "+
					"should be a positive integer but instead it was %d.",
					defaultReplicationLevel))
		}
	}

	initialNumberOfCollectionsAvailable, err :=
		util.NumberItemsAvailable(params.Client, "collections")
	if err != nil {
		loggerutil.FatalWithMessage(params.Logger,
			fmt.Sprintf("Error querying collection count: %v", err))
	}
	// Include a 1% margin for collections added while we're reading so
	// that we don't have to grow the map in most cases.
	maxExpectedCollections := int(
		float64(initialNumberOfCollectionsAvailable) * 1.01)
	results.UUIDToCollection = make(map[string]Collection, maxExpectedCollections)

	if params.Logger != nil {
		params.Logger.Update(func(p map[string]interface{}, e map[string]interface{}) {
			collectionInfo := logger.GetOrCreateMap(p, "collection_info")
			collectionInfo["num_collections_at_start"] = initialNumberOfCollectionsAvailable
			collectionInfo["batch_size"] = params.BatchSize
			collectionInfo["default_replication_level"] = defaultReplicationLevel
		})
	}

	// These values are just for getting the loop to run the first time,
	// afterwards they'll be set to real values.
	previousTotalCollections := -1
	totalCollections := 0
	for totalCollections > previousTotalCollections {
		// We're still finding new collections

		// Write the heap profile for examining memory usage
		WriteHeapProfile()

		// Get next batch of collections.
		var collections SdkCollectionList
		err := params.Client.List("collections", sdkParams, &collections)
		if err != nil {
			loggerutil.FatalWithMessage(params.Logger,
				fmt.Sprintf("Error querying collections: %v", err))
		}

		// Process collection and update our date filter.
		sdkParams["filters"].([][]string)[0][2] =
			ProcessCollections(params.Logger,
				collections.Items,
				defaultReplicationLevel,
				results.UUIDToCollection).Format(time.RFC3339)

		// update counts
		previousTotalCollections = totalCollections
		totalCollections = len(results.UUIDToCollection)

		log.Printf("%d collections read, %d new in last batch, "+
			"%s latest modified date, %.0f %d %d avg,max,total manifest size",
			totalCollections,
			totalCollections-previousTotalCollections,
			sdkParams["filters"].([][]string)[0][2],
			float32(totalManifestSize)/float32(totalCollections),
			maxManifestSize, totalManifestSize)

		if params.Logger != nil {
			params.Logger.Update(func(p map[string]interface{}, e map[string]interface{}) {
				collectionInfo := logger.GetOrCreateMap(p, "collection_info")
//.........這裏部分代碼省略.........

func singlerun() error {
	arv, err := arvadosclient.MakeArvadosClient()
	if err != nil {
		log.Fatalf("Error setting up arvados client %s", err.Error())
	}

	if is_admin, err := util.UserIsAdmin(arv); err != nil {
		log.Fatalf("Error querying current arvados user %s", err.Error())
	} else if !is_admin {
		log.Fatalf("Current user is not an admin. Datamanager can only be run by admins.")
	}

	var arvLogger *logger.Logger
	if logEventTypePrefix != "" {
		arvLogger = logger.NewLogger(logger.LoggerParams{
			Client:          arv,
			EventTypePrefix: logEventTypePrefix,
			WriteInterval:   time.Second * time.Duration(logFrequencySeconds)})
	}

	loggerutil.LogRunInfo(arvLogger)
	if arvLogger != nil {
		arvLogger.AddWriteHook(loggerutil.LogMemoryAlloc)
	}

	var (
		dataFetcher     summary.DataFetcher
		readCollections collection.ReadCollections
		keepServerInfo  keep.ReadServers
	)

	if summary.ShouldReadData() {
		dataFetcher = summary.ReadData
	} else {
		dataFetcher = BuildDataFetcher(arv)
	}

	dataFetcher(arvLogger, &readCollections, &keepServerInfo)

	summary.MaybeWriteData(arvLogger, readCollections, keepServerInfo)

	buckets := summary.BucketReplication(readCollections, keepServerInfo)
	bucketCounts := buckets.Counts()

	replicationSummary := buckets.SummarizeBuckets(readCollections)
	replicationCounts := replicationSummary.ComputeCounts()

	log.Printf("Blocks In Collections: %d, "+
		"\nBlocks In Keep: %d.",
		len(readCollections.BlockToDesiredReplication),
		len(keepServerInfo.BlockToServers))
	log.Println(replicationCounts.PrettyPrint())

	log.Printf("Blocks Histogram:")
	for _, rlbss := range bucketCounts {
		log.Printf("%+v: %10d",
			rlbss.Levels,
			rlbss.Count)
	}

	kc, err := keepclient.MakeKeepClient(&arv)
	if err != nil {
		loggerutil.FatalWithMessage(arvLogger,
			fmt.Sprintf("Error setting up keep client %s", err.Error()))
	}

	// Log that we're finished. We force the recording, since go will
	// not wait for the write timer before exiting.
	if arvLogger != nil {
		defer arvLogger.FinalUpdate(func(p map[string]interface{}, e map[string]interface{}) {
			summaryInfo := logger.GetOrCreateMap(p, "summary_info")
			summaryInfo["block_replication_counts"] = bucketCounts
			summaryInfo["replication_summary"] = replicationCounts
			p["summary_info"] = summaryInfo

			p["run_info"].(map[string]interface{})["finished_at"] = time.Now()
		})
	}

	pullServers := summary.ComputePullServers(kc,
		&keepServerInfo,
		readCollections.BlockToDesiredReplication,
		replicationSummary.UnderReplicatedBlocks)

	pullLists := summary.BuildPullLists(pullServers)

	trashLists, trashErr := summary.BuildTrashLists(kc,
		&keepServerInfo,
		replicationSummary.KeepBlocksNotInCollections)

	summary.WritePullLists(arvLogger, pullLists)

	if trashErr != nil {
		return err
	} else {
		keep.SendTrashLists(keep.GetDataManagerToken(arvLogger), kc, trashLists)
	}

	return nil
}