Golang Bucket.Put方法代碼示例

func putMinedBalance(ns walletdb.Bucket, amt coinutil.Amount) error {
	v := make([]byte, 8)
	byteOrder.PutUint64(v, uint64(amt))
	err := ns.Put(rootMinedBalance, v)
	if err != nil {
		str := "failed to put balance"
		return storeError(ErrDatabase, str, err)
	}
	return nil
}

// testPutValues stores all of the provided key/value pairs in the provided
// bucket while checking for errors.
func testPutValues(tc *testContext, bucket walletdb.Bucket, values map[string]string) bool {
	for k, v := range values {
		var vBytes []byte
		if v != "" {
			vBytes = []byte(v)
		}
		if err := bucket.Put([]byte(k), vBytes); err != nil {
			tc.t.Errorf("Put: unexpected error: %v", err)
			return false
		}
	}

	return true
}

// testBucketInterface ensures the bucket interface is working properly by
// exercising all of its functions.
func testBucketInterface(tc *testContext, bucket walletdb.Bucket) bool {
	if bucket.Writable() != tc.isWritable {
		tc.t.Errorf("Bucket writable state does not match.")
		return false
	}

	if tc.isWritable {
		// keyValues holds the keys and values to use when putting
		// values into the bucket.
		var keyValues = map[string]string{
			"bucketkey1": "foo1",
			"bucketkey2": "foo2",
			"bucketkey3": "foo3",
		}
		if !testPutValues(tc, bucket, keyValues) {
			return false
		}

		if !testGetValues(tc, bucket, keyValues) {
			return false
		}

		// Iterate all of the keys using ForEach while making sure the
		// stored values are the expected values.
		keysFound := make(map[string]struct{}, len(keyValues))
		err := bucket.ForEach(func(k, v []byte) error {
			kString := string(k)
			wantV, ok := keyValues[kString]
			if !ok {
				return fmt.Errorf("ForEach: key '%s' should "+
					"exist", kString)
			}

			if !reflect.DeepEqual(v, []byte(wantV)) {
				return fmt.Errorf("ForEach: value for key '%s' "+
					"does not match - got %s, want %s",
					kString, v, wantV)
			}

			keysFound[kString] = struct{}{}
			return nil
		})
		if err != nil {
			tc.t.Errorf("%v", err)
			return false
		}

		// Ensure all keys were iterated.
		for k := range keyValues {
			if _, ok := keysFound[k]; !ok {
				tc.t.Errorf("ForEach: key '%s' was not iterated "+
					"when it should have been", k)
				return false
			}
		}

		// Delete the keys and ensure they were deleted.
		if !testDeleteValues(tc, bucket, keyValues) {
			return false
		}
		if !testGetValues(tc, bucket, rollbackValues(keyValues)) {
			return false
		}

		// Ensure creating a new bucket works as expected.
		testBucketName := []byte("testbucket")
		testBucket, err := bucket.CreateBucket(testBucketName)
		if err != nil {
			tc.t.Errorf("CreateBucket: unexpected error: %v", err)
			return false
		}
		if !testNestedBucket(tc, testBucket) {
			return false
		}

		// Ensure creating a bucket that already exists fails with the
		// expected error.
		wantErr := walletdb.ErrBucketExists
		if _, err := bucket.CreateBucket(testBucketName); err != wantErr {
			tc.t.Errorf("CreateBucket: unexpected error - got %v, "+
				"want %v", err, wantErr)
			return false
		}

		// Ensure CreateBucketIfNotExists returns an existing bucket.
		testBucket, err = bucket.CreateBucketIfNotExists(testBucketName)
		if err != nil {
			tc.t.Errorf("CreateBucketIfNotExists: unexpected "+
				"error: %v", err)
			return false
		}
		if !testNestedBucket(tc, testBucket) {
			return false
		}

		// Ensure retrieving and existing bucket works as expected.
		testBucket = bucket.Bucket(testBucketName)
		if !testNestedBucket(tc, testBucket) {
//.........這裏部分代碼省略.........