本文整理汇总了Golang中github.com/flynn/flynn/Godeps/_workspace/src/github.com/boltdb/bolt.Open函数的典型用法代码示例。如果您正苦于以下问题:Golang Open函数的具体用法?Golang Open怎么用?Golang Open使用的例子?那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了Open函数的20个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于我们的系统推荐出更棒的Golang代码示例。
示例1: ExampleTx_CopyFile
func ExampleTx_CopyFile() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Create a bucket and a key.
db.Update(func(tx *bolt.Tx) error {
tx.CreateBucket([]byte("widgets"))
tx.Bucket([]byte("widgets")).Put([]byte("foo"), []byte("bar"))
return nil
})
// Copy the database to another file.
toFile := tempfile()
db.View(func(tx *bolt.Tx) error { return tx.CopyFile(toFile, 0666) })
defer os.Remove(toFile)
// Open the cloned database.
db2, _ := bolt.Open(toFile, 0666, nil)
defer db2.Close()
// Ensure that the key exists in the copy.
db2.View(func(tx *bolt.Tx) error {
value := tx.Bucket([]byte("widgets")).Get([]byte("foo"))
fmt.Printf("The value for 'foo' in the clone is: %s\n", value)
return nil
})
// Output:
// The value for 'foo' in the clone is: bar
}
开发者ID:devick,项目名称:flynn,代码行数:32,代码来源:tx_test.go
示例2: TestOpen_Check
// Ensure that a re-opened database is consistent.
func TestOpen_Check(t *testing.T) {
path := tempfile()
defer os.Remove(path)
db, err := bolt.Open(path, 0666, nil)
ok(t, err)
ok(t, db.View(func(tx *bolt.Tx) error { return <-tx.Check() }))
db.Close()
db, err = bolt.Open(path, 0666, nil)
ok(t, err)
ok(t, db.View(func(tx *bolt.Tx) error { return <-tx.Check() }))
db.Close()
}
开发者ID:ericcapricorn,项目名称:flynn,代码行数:15,代码来源:db_test.go
示例3: TestDB_Open_FileTooSmall
// Ensure that a database that is too small returns an error.
func TestDB_Open_FileTooSmall(t *testing.T) {
path := tempfile()
defer os.Remove(path)
db, err := bolt.Open(path, 0666, nil)
ok(t, err)
db.Close()
// corrupt the database
ok(t, os.Truncate(path, int64(os.Getpagesize())))
db, err = bolt.Open(path, 0666, nil)
equals(t, errors.New("file size too small"), err)
}
开发者ID:ericcapricorn,项目名称:flynn,代码行数:15,代码来源:db_test.go
示例4: Keys
// Keys retrieves a list of keys for a given bucket.
func Keys(path, name string) {
if _, err := os.Stat(path); os.IsNotExist(err) {
fatal(err)
return
}
db, err := bolt.Open(path, 0600, nil)
if err != nil {
fatal(err)
return
}
defer db.Close()
err = db.View(func(tx *bolt.Tx) error {
// Find bucket.
b := tx.Bucket([]byte(name))
if b == nil {
fatalf("bucket not found: %s", name)
return nil
}
// Iterate over each key.
return b.ForEach(func(key, _ []byte) error {
println(string(key))
return nil
})
})
if err != nil {
fatal(err)
return
}
}
开发者ID:ericcapricorn,项目名称:flynn,代码行数:33,代码来源:keys.go
示例5: TestImport
// Ensure that a database can be imported.
func TestImport(t *testing.T) {
SetTestMode(true)
// Write input file.
input := tempfile()
ok(t, ioutil.WriteFile(input, []byte(`[{"type":"bucket","key":"ZW1wdHk=","value":[]},{"type":"bucket","key":"d2lkZ2V0cw==","value":[{"key":"YmFy","value":""},{"key":"Zm9v","value":"MDAwMA=="}]},{"type":"bucket","key":"d29vaml0cw==","value":[{"key":"YmF6","value":"WFhYWA=="},{"type":"bucket","key":"d29vaml0cy9zdWJidWNrZXQ=","value":[{"key":"YmF0","value":"QQ=="}]}]}]`), 0600))
// Import database.
path := tempfile()
output := run("import", path, "--input", input)
equals(t, ``, output)
// Open database and verify contents.
db, err := bolt.Open(path, 0600, nil)
ok(t, err)
db.View(func(tx *bolt.Tx) error {
assert(t, tx.Bucket([]byte("empty")) != nil, "")
b := tx.Bucket([]byte("widgets"))
assert(t, b != nil, "")
equals(t, []byte("0000"), b.Get([]byte("foo")))
equals(t, []byte(""), b.Get([]byte("bar")))
b = tx.Bucket([]byte("woojits"))
assert(t, b != nil, "")
equals(t, []byte("XXXX"), b.Get([]byte("baz")))
b = b.Bucket([]byte("woojits/subbucket"))
equals(t, []byte("A"), b.Get([]byte("bat")))
return nil
})
db.Close()
}
开发者ID:ericcapricorn,项目名称:flynn,代码行数:35,代码来源:import_test.go
示例6: Run
// Run executes the command.
func (cmd *InfoCommand) Run(args ...string) error {
// Parse flags.
fs := flag.NewFlagSet("", flag.ContinueOnError)
help := fs.Bool("h", false, "")
if err := fs.Parse(args); err != nil {
return err
} else if *help {
fmt.Fprintln(cmd.Stderr, cmd.Usage())
return ErrUsage
}
// Require database path.
path := fs.Arg(0)
if path == "" {
return ErrPathRequired
} else if _, err := os.Stat(path); os.IsNotExist(err) {
return ErrFileNotFound
}
// Open the database.
db, err := bolt.Open(path, 0666, nil)
if err != nil {
return err
}
defer db.Close()
// Print basic database info.
info := db.Info()
fmt.Fprintf(cmd.Stdout, "Page Size: %d\n", info.PageSize)
return nil
}
开发者ID:devick,项目名称:flynn,代码行数:33,代码来源:main.go
示例7: OpenDB
// OpenDB opens and initialises the persistence DB, if not already open.
func (m *Manager) OpenDB() error {
if m.dbPath == "" {
return nil
}
m.dbMtx.Lock()
defer m.dbMtx.Unlock()
// open/initialize db
if err := os.MkdirAll(filepath.Dir(m.dbPath), 0755); err != nil {
return fmt.Errorf("could not mkdir for volume persistence db: %s", err)
}
db, err := bolt.Open(m.dbPath, 0600, &bolt.Options{Timeout: 5 * time.Second})
if err != nil {
return fmt.Errorf("could not open volume persistence db: %s", err)
}
if err := db.Update(func(tx *bolt.Tx) error {
// idempotently create buckets. (errors ignored because they're all compile-time impossible args checks.)
tx.CreateBucketIfNotExists([]byte("volumes"))
tx.CreateBucketIfNotExists([]byte("providers"))
return nil
}); err != nil {
return fmt.Errorf("could not initialize volume persistence db: %s", err)
}
m.db = db
if err := m.restore(); err != nil {
return err
}
return m.maybeInitDefaultProvider()
}
开发者ID:devick,项目名称:flynn,代码行数:29,代码来源:manager.go
示例8: ExampleBucket_ForEach
func ExampleBucket_ForEach() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Insert data into a bucket.
db.Update(func(tx *bolt.Tx) error {
tx.CreateBucket([]byte("animals"))
b := tx.Bucket([]byte("animals"))
b.Put([]byte("dog"), []byte("fun"))
b.Put([]byte("cat"), []byte("lame"))
b.Put([]byte("liger"), []byte("awesome"))
// Iterate over items in sorted key order.
b.ForEach(func(k, v []byte) error {
fmt.Printf("A %s is %s.\n", k, v)
return nil
})
return nil
})
// Output:
// A cat is lame.
// A dog is fun.
// A liger is awesome.
}
开发者ID:ericcapricorn,项目名称:flynn,代码行数:27,代码来源:bucket_test.go
示例9: ExampleBucket_Put
func ExampleBucket_Put() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Start a write transaction.
db.Update(func(tx *bolt.Tx) error {
// Create a bucket.
tx.CreateBucket([]byte("widgets"))
// Set the value "bar" for the key "foo".
tx.Bucket([]byte("widgets")).Put([]byte("foo"), []byte("bar"))
return nil
})
// Read value back in a different read-only transaction.
db.View(func(tx *bolt.Tx) error {
value := tx.Bucket([]byte("widgets")).Get([]byte("foo"))
fmt.Printf("The value of 'foo' is: %s\n", value)
return nil
})
// Output:
// The value of 'foo' is: bar
}
开发者ID:ericcapricorn,项目名称:flynn,代码行数:26,代码来源:bucket_test.go
示例10: ExampleDB_Begin_ReadOnly
func ExampleDB_Begin_ReadOnly() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Create a bucket.
db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucket([]byte("widgets"))
return err
})
// Create several keys in a transaction.
tx, _ := db.Begin(true)
b := tx.Bucket([]byte("widgets"))
b.Put([]byte("john"), []byte("blue"))
b.Put([]byte("abby"), []byte("red"))
b.Put([]byte("zephyr"), []byte("purple"))
tx.Commit()
// Iterate over the values in sorted key order.
tx, _ = db.Begin(false)
c := tx.Bucket([]byte("widgets")).Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
fmt.Printf("%s likes %s\n", k, v)
}
tx.Rollback()
// Output:
// abby likes red
// john likes blue
// zephyr likes purple
}
开发者ID:ericcapricorn,项目名称:flynn,代码行数:33,代码来源:db_test.go
示例11: NewTestDB
// NewTestDB returns a new instance of TestDB.
func NewTestDB() *TestDB {
db, err := bolt.Open(tempfile(), 0666, nil)
if err != nil {
panic("cannot open db: " + err.Error())
}
return &TestDB{db}
}
开发者ID:ericcapricorn,项目名称:flynn,代码行数:8,代码来源:db_test.go
示例12: ExampleDB_View
func ExampleDB_View() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Insert data into a bucket.
db.Update(func(tx *bolt.Tx) error {
tx.CreateBucket([]byte("people"))
b := tx.Bucket([]byte("people"))
b.Put([]byte("john"), []byte("doe"))
b.Put([]byte("susy"), []byte("que"))
return nil
})
// Access data from within a read-only transactional block.
db.View(func(tx *bolt.Tx) error {
v := tx.Bucket([]byte("people")).Get([]byte("john"))
fmt.Printf("John's last name is %s.\n", v)
return nil
})
// Output:
// John's last name is doe.
}
开发者ID:ericcapricorn,项目名称:flynn,代码行数:25,代码来源:db_test.go
示例13: ExampleDB_Update
func ExampleDB_Update() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Execute several commands within a write transaction.
err := db.Update(func(tx *bolt.Tx) error {
b, err := tx.CreateBucket([]byte("widgets"))
if err != nil {
return err
}
if err := b.Put([]byte("foo"), []byte("bar")); err != nil {
return err
}
return nil
})
// If our transactional block didn't return an error then our data is saved.
if err == nil {
db.View(func(tx *bolt.Tx) error {
value := tx.Bucket([]byte("widgets")).Get([]byte("foo"))
fmt.Printf("The value of 'foo' is: %s\n", value)
return nil
})
}
// Output:
// The value of 'foo' is: bar
}
开发者ID:ericcapricorn,项目名称:flynn,代码行数:30,代码来源:db_test.go
示例14: OpenDB
// OpenDB opens and initialises the persistence DB, if not already open.
func (s *State) OpenDB() error {
s.dbCond.L.Lock()
defer s.dbCond.L.Unlock()
if s.stateDB != nil {
return nil
}
// open/initialize db
if err := os.MkdirAll(filepath.Dir(s.stateFilePath), 0755); err != nil {
return fmt.Errorf("could not not mkdir for db: %s", err)
}
stateDB, err := bolt.Open(s.stateFilePath, 0600, &bolt.Options{Timeout: 5 * time.Second})
if err != nil {
return fmt.Errorf("could not open db: %s", err)
}
s.stateDB = stateDB
if err := s.stateDB.Update(func(tx *bolt.Tx) error {
// idempotently create buckets. (errors ignored because they're all compile-time impossible args checks.)
tx.CreateBucketIfNotExists([]byte("jobs"))
tx.CreateBucketIfNotExists([]byte("backend-jobs"))
tx.CreateBucketIfNotExists([]byte("backend-global"))
tx.CreateBucketIfNotExists([]byte("persistent-jobs"))
return nil
}); err != nil {
return fmt.Errorf("could not initialize host persistence db: %s", err)
}
return nil
}
开发者ID:leroyg,项目名称:flynn,代码行数:30,代码来源:state.go
示例15: ExampleTx_Rollback
func ExampleTx_Rollback() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Create a bucket.
db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucket([]byte("widgets"))
return err
})
// Set a value for a key.
db.Update(func(tx *bolt.Tx) error {
return tx.Bucket([]byte("widgets")).Put([]byte("foo"), []byte("bar"))
})
// Update the key but rollback the transaction so it never saves.
tx, _ := db.Begin(true)
b := tx.Bucket([]byte("widgets"))
b.Put([]byte("foo"), []byte("baz"))
tx.Rollback()
// Ensure that our original value is still set.
db.View(func(tx *bolt.Tx) error {
value := tx.Bucket([]byte("widgets")).Get([]byte("foo"))
fmt.Printf("The value for 'foo' is still: %s\n", value)
return nil
})
// Output:
// The value for 'foo' is still: bar
}
开发者ID:devick,项目名称:flynn,代码行数:33,代码来源:tx_test.go
示例16: TestOpen
// Ensure that a database can be opened without error.
func TestOpen(t *testing.T) {
path := tempfile()
defer os.Remove(path)
db, err := bolt.Open(path, 0666, nil)
assert(t, db != nil, "")
ok(t, err)
equals(t, db.Path(), path)
ok(t, db.Close())
}
开发者ID:ericcapricorn,项目名称:flynn,代码行数:10,代码来源:db_test.go
示例17: start
func (r *Runner) start() error {
r.githubToken = os.Getenv("GITHUB_TOKEN")
if r.githubToken == "" {
return errors.New("GITHUB_TOKEN not set")
}
awsAuth, err := aws.EnvAuth()
if err != nil {
return err
}
r.s3Bucket = s3.New(awsAuth, aws.USEast).Bucket(logBucket)
bc := r.bc
bc.Network, err = r.allocateNet()
if err != nil {
return err
}
if r.rootFS, err = cluster.BuildFlynn(bc, args.RootFS, "origin/master", false, os.Stdout); err != nil {
return fmt.Errorf("could not build flynn: %s", err)
}
r.releaseNet(bc.Network)
defer os.RemoveAll(r.rootFS)
db, err := bolt.Open(args.DBPath, 0600, &bolt.Options{Timeout: 5 * time.Second})
if err != nil {
return fmt.Errorf("could not open db: %s", err)
}
r.db = db
defer r.db.Close()
if err := r.db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists(dbBucket)
return err
}); err != nil {
return fmt.Errorf("could not create builds bucket: %s", err)
}
for i := 0; i < maxBuilds; i++ {
r.buildCh <- struct{}{}
}
if err := r.buildPending(); err != nil {
log.Printf("could not build pending builds: %s", err)
}
go r.watchEvents()
http.HandleFunc("/", r.httpEventHandler)
http.HandleFunc("/builds", r.httpBuildHandler)
http.Handle("/assets/", http.StripPrefix("/assets/", http.FileServer(http.Dir(args.AssetsDir))))
handler := handlers.CombinedLoggingHandler(os.Stdout, http.DefaultServeMux)
log.Println("Listening on", args.ListenAddr, "...")
if err := http.ListenAndServeTLS(args.ListenAddr, args.TLSCert, args.TLSKey, handler); err != nil {
return fmt.Errorf("ListenAndServeTLS: %s", err)
}
return nil
}
开发者ID:snormore,项目名称:flynn,代码行数:57,代码来源:runner.go
示例18: TestDB_Open_FileError
// Ensure that the database returns an error if the file handle cannot be open.
func TestDB_Open_FileError(t *testing.T) {
path := tempfile()
defer os.Remove(path)
_, err := bolt.Open(path+"/youre-not-my-real-parent", 0666, nil)
assert(t, err.(*os.PathError) != nil, "")
equals(t, path+"/youre-not-my-real-parent", err.(*os.PathError).Path)
equals(t, "open", err.(*os.PathError).Op)
}
开发者ID:ericcapricorn,项目名称:flynn,代码行数:10,代码来源:db_test.go
示例19: start
func (r *Runner) start() error {
r.githubToken = os.Getenv("GITHUB_TOKEN")
if r.githubToken == "" {
return errors.New("GITHUB_TOKEN not set")
}
awsAuth, err := aws.EnvAuth()
if err != nil {
return err
}
r.s3Bucket = s3.New(awsAuth, aws.USEast).Bucket(logBucket)
if r.dockerFS == "" {
var err error
bc := r.bc
bc.Network, err = r.allocateNet()
if err != nil {
return err
}
if r.dockerFS, err = cluster.BuildFlynn(bc, "", "master", os.Stdout); err != nil {
return fmt.Errorf("could not build flynn: %s", err)
}
r.releaseNet(bc.Network)
defer os.RemoveAll(r.dockerFS)
}
db, err := bolt.Open(args.DBPath, 0600, &bolt.Options{Timeout: 5 * time.Second})
if err != nil {
return fmt.Errorf("could not open db: %s", err)
}
r.db = db
defer r.db.Close()
if err := r.db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists([]byte("pending-builds"))
return err
}); err != nil {
return fmt.Errorf("could not create pending-builds bucket: %s", err)
}
for i := 0; i < maxBuilds; i++ {
r.buildCh <- struct{}{}
}
if err := r.buildPending(); err != nil {
log.Printf("could not build pending builds: %s", err)
}
go r.watchEvents()
http.Handle("/", handlers.CombinedLoggingHandler(os.Stdout, http.HandlerFunc(r.httpEventHandler)))
log.Println("Listening on :80...")
if err := http.ListenAndServe(":80", nil); err != nil {
return fmt.Errorf("ListenAndServer: %s", err)
}
return nil
}
开发者ID:nightscape,项目名称:flynn,代码行数:57,代码来源:runner.go
示例20: ExampleDB_Batch
func ExampleDB_Batch() {
// Open the database.
db, _ := bolt.Open(tempfile(), 0666, nil)
defer os.Remove(db.Path())
defer db.Close()
// Start our web server
count := counter{db}
srv := httptest.NewServer(count)
defer srv.Close()
// Decrease the batch size to make things more interesting.
db.MaxBatchSize = 3
// Get every path multiple times concurrently.
const clients = 10
paths := []string{
"/foo",
"/bar",
"/baz",
"/quux",
"/thud",
"/xyzzy",
}
errors := make(chan error, clients)
for i := 0; i < clients; i++ {
go func(id int) {
errors <- client(id, srv.URL, paths)
}(i)
}
// Check all responses to make sure there's no error.
for i := 0; i < clients; i++ {
if err := <-errors; err != nil {
fmt.Printf("client error: %v", err)
return
}
}
// Check the final result
db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("hits"))
c := b.Cursor()
for k, v := c.First(); k != nil; k, v = c.Next() {
fmt.Printf("hits to %s: %d\n", k, decode(v))
}
return nil
})
// Output:
// hits to /bar: 10
// hits to /baz: 10
// hits to /foo: 10
// hits to /quux: 10
// hits to /thud: 10
// hits to /xyzzy: 10
}
开发者ID:devick,项目名称:flynn,代码行数:56,代码来源:batch_example_test.go
注:本文中的github.com/flynn/flynn/Godeps/_workspace/src/github.com/boltdb/bolt.Open函数示例整理自Github/MSDocs等源码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。 |
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