utils

Documentation

Index

• Variables
• func ComputeTokens(dcCounts []int, partitioner Partitioner) [][]string
• func CopyFile(src, dest string) error
• func CopyFileToDir(src, destDir string) (string, error)
• func DeepHashObject(hasher hash.Hash, objectToWrite interface{})
• func DeepHashString(obj interface{}) string
• func FindEnvVar(envVars []corev1.EnvVar, name string) *corev1.EnvVar
• func FindEnvVarInContainer(container *corev1.Container, name string) *corev1.EnvVar
• func FirstNonEmptyString(strs ...string) string
• func GetKey(obj metav1.Object) client.ObjectKey
• func GetMapNested(m map[string]interface{}, key string, keys ...string) (interface{}, bool)
• func ListFiles(root, pattern string) ([]string, error)
• func MergeMap(sources ...map[string]string) map[string]string
• func MergeMapNested(allowOverwrite bool, sources ...map[string]interface{}) (map[string]interface{}, error)
• func PutMapNested(allowOverwrite bool, m map[string]interface{}, val interface{}, key string, ...) error
• func ReadLines(file string) ([]string, error)
• func RemoveValue(slice []string, value string) []string
• func SliceContains(slice []string, s string) bool
• func UnmarshalToMap(data []byte) (map[string]interface{}, error)
• type Partitioner

Variables

var Murmur3Partitioner = Partitioner{
	RingOffset: new(big.Int).Lsh(newBigInt(-1), 63),
	RingRange:  new(big.Int).Lsh(one, 64),
}

var RandomPartitioner = Partitioner{
	RingOffset: new(big.Int),
	RingRange:  new(big.Int).Lsh(one, 127),
}

Functions

func ComputeTokens

func ComputeTokens(dcCounts []int, partitioner Partitioner) [][]string

ComputeTokens takes a list of numbers indicating the number of nodes in each datacenter, and returns a recommended list of tokens for the given partitioner (one token per node, grouped by datacenter).

func CopyFile

func CopyFile(src, dest string) error

CopyFile copies file src to file dest. File src must exist. File dest doesn't need to exist nor its parent directories, they will be created if required. Existing dest file will be overwritten.

func CopyFileToDir

func CopyFileToDir(src, destDir string) (string, error)

CopyFileToDir copies file src to directory destDir. File src must exist. Directory destDir doesn't need exist nor its parent directories, they will be created if required. The destination file will have the same name as src. If that file already exists, it will be overwritten.

func DeepHashObject

func DeepHashObject(hasher hash.Hash, objectToWrite interface{})

DeepHashObject writes specified object to hash using the spew library which follows pointers and prints actual values of the nested objects ensuring the hash does not change when a pointer changes.

func DeepHashString

func DeepHashString(obj interface{}) string

func FindEnvVar

func FindEnvVar(envVars []corev1.EnvVar, name string) *corev1.EnvVar

func FindEnvVarInContainer

func FindEnvVarInContainer(container *corev1.Container, name string) *corev1.EnvVar

func FirstNonEmptyString

func FirstNonEmptyString(strs ...string) string

FirstNonEmptyString returns the first non-empty string in the provided list of strings. If all strings are empty, an empty string is returned.

func GetKey

func GetKey(obj metav1.Object) client.ObjectKey

func GetMapNested

func GetMapNested(m map[string]interface{}, key string, keys ...string) (interface{}, bool)

GetMapNested gets the value at the given keys in the given map. It returns nil and false if the map does not contain all the keys.

func ListFiles

func ListFiles(root, pattern string) ([]string, error)

ListFiles lists all files whose names match pattern in root directory and its subdirectories.

func MergeMap

func MergeMap(sources ...map[string]string) map[string]string

MergeMap will take two or more maps, merging the entries of the sources map into a destination map. If both maps share the same key then destination's value for that key will be overwritten with what's in source.

func MergeMapNested

func MergeMapNested(allowOverwrite bool, sources ...map[string]interface{}) (map[string]interface{}, error)

MergeMapNested will take two or more maps, merging the entries of the sources map into a destination map. If both maps share the same key then destination's value for that key will be merged with what's in source. The source maps are not modified. If allowOverwrite is false, an error is returned if the key already exists and its value is not nil.

func PutMapNested

func PutMapNested(allowOverwrite bool, m map[string]interface{}, val interface{}, key string, keys ...string) error

PutMapNested puts the given value in the given map at the given keys. When a key is not present, the entry is created on the fly; nested entries are always of type map[string]interface{} to allow for nested entries to be further inserted. If allowOverwrite is false, an error is returned if the key already exists and its value is not nil.

func ReadLines

func ReadLines(file string) ([]string, error)

ReadLines reads all lines in the given file.

func RemoveValue

func RemoveValue(slice []string, value string) []string

func SliceContains

func SliceContains(slice []string, s string) bool

func UnmarshalToMap

func UnmarshalToMap(data []byte) (map[string]interface{}, error)

Types

type Partitioner

type Partitioner struct {
	RingOffset *big.Int
	RingRange  *big.Int
}