zookeeper

package
v0.0.0-...-cbea63e Latest Latest
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 Go to latest Published: Dec 4, 2021 License: Apache-2.0 Imports: 14 Imported by: 0

Documentation

Overview

Package to interface Hailo systems and config with Zookeeper

NOTE: All path parameters should be formated like below. Slashes for the separator and the leading slash are required. 

path := "/path/to/my/data"

Index

Constants

View Source 
const (
	HealthCheckId  = "com.hailocab.service.zookeeper"
	MaxConnCheckId = "com.hailocab.service.zookeeper.maxconns"
)

Variables

View Source 
var (

	// The connection function used when creating a new ZK connection. Replace this with a mock function during tests
	// that test ZooKeeper integration
	Connector func(servers []string, recvTimeout time.Duration) (ZookeeperClient, <-chan gozk.Event, error) = DefaultConnector
)

Functions

func Children 

func Children(path string) ([]string, *gozk.Stat, error)

func ChildrenW 

func ChildrenW(path string) ([]string, *gozk.Stat, <-chan gozk.Event, error)

func CloseConnection 

func CloseConnection() error

CloseConnection closes the underlying network connection to zookeeper This will trigger both the send and recv loops to exit and requests to flush and then we will automatically attempt to reconnect

Needless to say, this is the nuclear option, and should only be used as a part of higher level constructs in the event of a near fatal error

func Create 

func Create(path string, data []byte, flags int32, acl []gozk.ACL) (string, error)

func CreateParents 

func CreateParents(path string) error

CreateParents creates any parent nodes for the given path if required. If all the parent nodes already exist then no error is returned.

func CreateProtectedEphemeralSequential 

func CreateProtectedEphemeralSequential(path string, data []byte, acl []gozk.ACL) (string, error)

func Delete 

func Delete(path string, version int32) error

func Exists 

func Exists(path string) (bool, *gozk.Stat, error)

func ExistsW 

func ExistsW(path string) (bool, *gozk.Stat, <-chan gozk.Event, error)

func Get 

func Get(path string) ([]byte, *gozk.Stat, error)

func GetACL 

func GetACL(path string) ([]gozk.ACL, *gozk.Stat, error)

func GetW 

func GetW(path string) ([]byte, *gozk.Stat, <-chan gozk.Event, error)

func HealthCheck 

func HealthCheck() healthcheck.Checker

HealthCheck asserts we can talk to ZK

func MaxConnHealthCheck 

func MaxConnHealthCheck(maxconns int) healthcheck.Checker

MaxConnHealthCheck asserts that the total number of established connections to all zookeeper nodes falls below a given max threshold.

func Multi 

func Multi(ops gozk.MultiOps) error

func NewLock 

func NewLock(path string, acl []gozk.ACL) gozk.Locker

func Set 

func Set(path string, data []byte, version int32) (*gozk.Stat, error)

func SetACL 

func SetACL(path string, acl []gozk.ACL, version int32) (*gozk.Stat, error)

func State 

func State() gozk.State

func Sync 

func Sync(path string) (string, error)

func TearDown 

func TearDown()

Close and remove the connection, WITHOUT attempting to automatically reconnect

func WaitForConnect 

func WaitForConnect(d time.Duration) error

WaitForConnect will wait until we are connected to ZK successfully for duration N

Types

type MockLock 

type MockLock struct {
	mock.Mock
}

func (*MockLock) Lock 

func (l *MockLock) Lock() error

func (*MockLock) SetTTL 

func (l *MockLock) SetTTL(d time.Duration)

func (*MockLock) SetTimeout 

func (l *MockLock) SetTimeout(d time.Duration)

func (*MockLock) Unlock 

func (l *MockLock) Unlock() error

type MockZookeeperClient 

type MockZookeeperClient struct {
	mock.Mock
}

Implements the ZookeeperClient interface 

var ActiveMockZookeeperClient *MockZookeeperClient = nil

This must be set to an instance of MockZookeeperClient before tests begin. MockConnector will always return this pointer

func (*MockZookeeperClient) Children 

func (c *MockZookeeperClient) Children(path string) ([]string, *gozk.Stat, error)

func (*MockZookeeperClient) ChildrenW 

func (c *MockZookeeperClient) ChildrenW(path string) ([]string, *gozk.Stat, <-chan gozk.Event, error)

func (*MockZookeeperClient) Close 

func (c *MockZookeeperClient) Close()

func (*MockZookeeperClient) Create 

func (c *MockZookeeperClient) Create(path string, data []byte, flags int32, acl []gozk.ACL) (string, error)

func (*MockZookeeperClient) CreateProtectedEphemeralSequential 

func (c *MockZookeeperClient) CreateProtectedEphemeralSequential(path string, data []byte, acl []gozk.ACL) (string, error)

func (*MockZookeeperClient) Delete 

func (c *MockZookeeperClient) Delete(path string, version int32) error

func (*MockZookeeperClient) Exists 

func (c *MockZookeeperClient) Exists(path string) (bool, *gozk.Stat, error)

func (*MockZookeeperClient) ExistsW 

func (c *MockZookeeperClient) ExistsW(path string) (bool, *gozk.Stat, <-chan gozk.Event, error)

func (*MockZookeeperClient) Get 

func (c *MockZookeeperClient) Get(path string) ([]byte, *gozk.Stat, error)

func (*MockZookeeperClient) GetACL 

func (c *MockZookeeperClient) GetACL(path string) ([]gozk.ACL, *gozk.Stat, error)

func (*MockZookeeperClient) GetW 

func (c *MockZookeeperClient) GetW(path string) ([]byte, *gozk.Stat, <-chan gozk.Event, error)

func (*MockZookeeperClient) Multi 

func (c *MockZookeeperClient) Multi(ops gozk.MultiOps) error

func (*MockZookeeperClient) NewLock 

func (c *MockZookeeperClient) NewLock(path string, acl []gozk.ACL) gozk.Locker

func (*MockZookeeperClient) Reconnect 

func (c *MockZookeeperClient) Reconnect() error

func (*MockZookeeperClient) Set 

func (c *MockZookeeperClient) Set(path string, data []byte, version int32) (*gozk.Stat, error)

func (*MockZookeeperClient) SetACL 

func (c *MockZookeeperClient) SetACL(path string, acl []gozk.ACL, version int32) (*gozk.Stat, error)

func (*MockZookeeperClient) State 

func (c *MockZookeeperClient) State() gozk.State

func (*MockZookeeperClient) Sync 

func (c *MockZookeeperClient) Sync(path string) (string, error)

func (*MockZookeeperClient) UpdateAddrs 

func (c *MockZookeeperClient) UpdateAddrs(addrs []string) error

type ZookeeperClient 

type ZookeeperClient interface {
	Children(path string) ([]string, *gozk.Stat, error)
	ChildrenW(path string) ([]string, *gozk.Stat, <-chan gozk.Event, error)
	Close()
	Create(path string, data []byte, flags int32, acl []gozk.ACL) (string, error)
	CreateProtectedEphemeralSequential(path string, data []byte, acl []gozk.ACL) (string, error)
	Delete(path string, version int32) error
	Exists(path string) (bool, *gozk.Stat, error)
	ExistsW(path string) (bool, *gozk.Stat, <-chan gozk.Event, error)
	Get(path string) ([]byte, *gozk.Stat, error)
	GetACL(path string) ([]gozk.ACL, *gozk.Stat, error)
	GetW(path string) ([]byte, *gozk.Stat, <-chan gozk.Event, error)
	Multi(ops gozk.MultiOps) error
	Reconnect() error
	Set(path string, data []byte, version int32) (*gozk.Stat, error)
	SetACL(path string, acl []gozk.ACL, version int32) (*gozk.Stat, error)
	State() gozk.State
	Sync(path string) (string, error)
	UpdateAddrs(addrs []string) error
	NewLock(path string, acl []gozk.ACL) gozk.Locker
}

func DefaultConnector 

func DefaultConnector(servers []string, recvTimeout time.Duration) (ZookeeperClient, <-chan gozk.Event, error)

The default connection function used; replace the Connector value with this when you finish testing (if you mocked ZooKeeper)

func MockConnector 

func MockConnector(servers []string, recvTimeout time.Duration) (ZookeeperClient, <-chan gozk.Event, error)

Connector which returns a MockZooKeeperClient. To use a ZK mock during testing, replace zookeeper.Connector with this function (and be sure to set it back to zookeeper.DefaultConnector when the test exits [via a deferred call])

Source Files

View all Source files

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