a6965d493f
The btclog package has been changed to defining its own logging interface (rather than seelog's) and provides a default implementation for callers to use. There are two primary advantages to the new logger implementation. First, all log messages are created before the call returns. Compared to seelog, this prevents data races when mutable variables are logged. Second, the new logger does not implement any kind of artifical rate limiting (what seelog refers to as "adaptive logging"). Log messages are outputted as soon as possible and the application will appear to perform much better when watching standard output. Because log rotation is not a feature of the btclog logging implementation, it is handled by the main package by importing a file rotation package that provides an io.Reader interface for creating output to a rotating file output. The rotator has been configured with the same defaults that btcd previously used in the seelog config (10MB file limits with maximum of 3 rolls) but now compresses newly created roll files. Due to the high compressibility of log text, the compressed files typically reduce to around 15-30% of the original 10MB file.
117 lines
3.2 KiB
Go
117 lines
3.2 KiB
Go
// Copyright (c) 2015-2016 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package main
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import (
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"os"
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"path/filepath"
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"runtime"
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"strings"
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"github.com/btcsuite/btcd/database"
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"github.com/btcsuite/btclog"
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flags "github.com/jessevdk/go-flags"
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)
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const (
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// blockDbNamePrefix is the prefix for the btcd block database.
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blockDbNamePrefix = "blocks"
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)
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var (
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log btclog.Logger
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shutdownChannel = make(chan error)
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)
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// loadBlockDB opens the block database and returns a handle to it.
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func loadBlockDB() (database.DB, error) {
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// The database name is based on the database type.
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dbName := blockDbNamePrefix + "_" + cfg.DbType
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dbPath := filepath.Join(cfg.DataDir, dbName)
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log.Infof("Loading block database from '%s'", dbPath)
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db, err := database.Open(cfg.DbType, dbPath, activeNetParams.Net)
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if err != nil {
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// Return the error if it's not because the database doesn't
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// exist.
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if dbErr, ok := err.(database.Error); !ok || dbErr.ErrorCode !=
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database.ErrDbDoesNotExist {
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return nil, err
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}
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// Create the db if it does not exist.
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err = os.MkdirAll(cfg.DataDir, 0700)
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if err != nil {
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return nil, err
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}
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db, err = database.Create(cfg.DbType, dbPath, activeNetParams.Net)
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if err != nil {
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return nil, err
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}
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}
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log.Info("Block database loaded")
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return db, nil
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}
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// realMain is the real main function for the utility. It is necessary to work
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// around the fact that deferred functions do not run when os.Exit() is called.
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func realMain() error {
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// Setup logging.
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backendLogger := btclog.NewBackend(os.Stdout)
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defer os.Stdout.Sync()
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log = backendLogger.Logger("MAIN")
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dbLog := backendLogger.Logger("BCDB")
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dbLog.SetLevel(btclog.LevelDebug)
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database.UseLogger(dbLog)
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// Setup the parser options and commands.
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appName := filepath.Base(os.Args[0])
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appName = strings.TrimSuffix(appName, filepath.Ext(appName))
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parserFlags := flags.Options(flags.HelpFlag | flags.PassDoubleDash)
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parser := flags.NewNamedParser(appName, parserFlags)
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parser.AddGroup("Global Options", "", cfg)
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parser.AddCommand("insecureimport",
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"Insecurely import bulk block data from bootstrap.dat",
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"Insecurely import bulk block data from bootstrap.dat. "+
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"WARNING: This is NOT secure because it does NOT "+
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"verify chain rules. It is only provided for testing "+
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"purposes.", &importCfg)
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parser.AddCommand("loadheaders",
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"Time how long to load headers for all blocks in the database",
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"", &headersCfg)
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parser.AddCommand("fetchblock",
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"Fetch the specific block hash from the database", "",
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&fetchBlockCfg)
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parser.AddCommand("fetchblockregion",
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"Fetch the specified block region from the database", "",
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&blockRegionCfg)
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// Parse command line and invoke the Execute function for the specified
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// command.
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if _, err := parser.Parse(); err != nil {
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if e, ok := err.(*flags.Error); ok && e.Type == flags.ErrHelp {
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parser.WriteHelp(os.Stderr)
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} else {
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log.Error(err)
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}
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return err
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}
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return nil
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}
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func main() {
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// Use all processor cores.
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runtime.GOMAXPROCS(runtime.NumCPU())
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// Work around defer not working after os.Exit()
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if err := realMain(); err != nil {
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os.Exit(1)
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}
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}
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