util

package
Version: v1.0.0 Latest Latest
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Published: Jun 18, 2015 License: Apache-2.0 Imports: 43 Imported by: 0

Documentation

Overview

Package util implements various utility functions used in both testing and implementation of Kubernetes. Package util may not depend on any other package in the Kubernetes package tree.

Index

Constants

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const CIdentifierFmt string = "[A-Za-z_][A-Za-z0-9_]*"
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const DNS1123LabelFmt string = "[a-z0-9]([-a-z0-9]*[a-z0-9])?"
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const DNS1123LabelMaxLength int = 63
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const DNS1123SubdomainFmt string = DNS1123LabelFmt + "(\\." + DNS1123LabelFmt + ")*"
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const DNS1123SubdomainMaxLength int = 253
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const DNS952LabelFmt string = "[a-z]([-a-z0-9]*[a-z0-9])?"
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const DNS952LabelMaxLength int = 24
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const LabelValueFmt string = "(" + QualifiedNameFmt + ")?"
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const LabelValueMaxLength int = 63
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const QualifiedNameFmt string = "(" + qnameCharFmt + qnameExtCharFmt + "*)?" + qnameCharFmt
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const QualifiedNameMaxLength int = 63

Variables

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var ErrorHandlers = []func(error){logError}

ErrorHandlers is a list of functions which will be invoked when an unreturnable error occurs.

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var NeverStop <-chan struct{} = make(chan struct{})

NeverStop may be passed to Until to make it never stop.

View Source
var PanicHandlers = []func(interface{}){logPanic}

PanicHandlers is a list of functions which will be invoked when a panic happens.

View Source
var ReallyCrash bool

For testing, bypass HandleCrash.

Functions

func AddAllFlagsToPFlags added in v0.2.2

func AddAllFlagsToPFlags()

Add all of the top level 'flag' package flags to the top level 'pflag' flags.

func AddFlagSetToPFlagSet added in v0.2.1

func AddFlagSetToPFlagSet(fsIn *flag.FlagSet, fsOut *pflag.FlagSet)

Adds all of the flags in a 'flag.FlagSet' package flags to a 'pflag.FlagSet'.

func AddPFlagSetToPFlagSet added in v0.2.2

func AddPFlagSetToPFlagSet(fsFrom *pflag.FlagSet, fsTo *pflag.FlagSet)

Merge all of the flags from fsFrom into fsTo.

func AllPtrFieldsNil added in v0.2.1

func AllPtrFieldsNil(obj interface{}) bool

Tests whether all pointer fields in a struct are nil. This is useful when, for example, an API struct is handled by plugins which need to distinguish "no plugin accepted this spec" from "this spec is empty".

This function is only valid for structs and pointers to structs. Any other type will cause a panic. Passing a typed nil pointer will return true.

func ApplyOomScoreAdj added in v0.2.1

func ApplyOomScoreAdj(pid int, value int) error

Writes 'value' to /proc/<pid>/oom_score_adj. PID = 0 means self

func CertPoolFromFile added in v0.4.4

func CertPoolFromFile(filename string) (*x509.CertPool, error)

CertPoolFromFile returns an x509.CertPool containing the certificates in the given PEM-encoded file. Returns an error if the file could not be read, a certificate could not be parsed, or if the file does not contain any certificates

func ChooseHostInterface added in v0.4.2

func ChooseHostInterface() (net.IP, error)

ChooseHostInterface is a method used fetch an IP for a daemon. It uses data from /proc/net/route file. For a node with no internet connection ,it returns error For a multi n/w interface node it returns the IP of the interface with gateway on it.

func CompileRegexps

func CompileRegexps(regexpStrings []string) ([]*regexp.Regexp, error)

Takes a list of strings and compiles them into a list of regular expressions

func DeepHashObject added in v0.2.1

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 EscapeQualifiedNameForDisk added in v0.4.3

func EscapeQualifiedNameForDisk(in string) string

EscapeQualifiedNameForDisk converts a plugin name, which might contain a / into a string that is safe to use on-disk. This assumes that the input has already been validates as a qualified name. we use "~" rather than ":" here in case we ever use a filesystem that doesn't allow ":".

func ExecuteTemplate added in v0.2.2

func ExecuteTemplate(w io.Writer, templateText string, data interface{}) error

ExecuteTemplate executes templateText with data and output written to w.

func ExecuteTemplateToString added in v0.2.2

func ExecuteTemplateToString(templateText string, data interface{}) (string, error)

func FlushLogs

func FlushLogs()

FlushLogs flushes logs immediately.

func Forever

func Forever(f func(), period time.Duration)

Forever loops forever running f every period. Catches any panics, and keeps going. Deprecated. Please use Until and pass NeverStop as the stopCh.

func GenerateSelfSignedCert added in v0.2.1

func GenerateSelfSignedCert(host, certPath, keyPath string) error

GenerateSelfSignedCert creates a self-signed certificate and key for the given host. Host may be an IP or a DNS name The certificate will be created with file mode 0644. The key will be created with file mode 0600. If the certificate or key files already exist, they will be overwritten. Any parent directories of the certPath or keyPath will be created as needed with file mode 0755.

func GetClient added in v0.5.1

func GetClient(req *http.Request) string

func GetHostname added in v0.2.1

func GetHostname(hostnameOverride string) string

func HandleCrash

func HandleCrash()

HandleCrash simply catches a crash and logs an error. Meant to be called via defer.

func HandleError added in v0.2.1

func HandleError(err error)

HandlerError is a method to invoke when a non-user facing piece of code cannot return an error and needs to indicate it has been ignored. Invoking this method is preferable to logging the error - the default behavior is to log but the errors may be sent to a remote server for analysis.

func InitFlags added in v0.2.2

func InitFlags()

InitFlags normalizes and parses the command line flags

func InitLogs

func InitLogs()

InitLogs initializes logs the way we want for kubernetes.

func IsCIdentifier

func IsCIdentifier(value string) bool

IsCIdentifier tests for a string that conforms the definition of an identifier in C. This checks the format, but not the length.

func IsDNS1123Label added in v0.2.1

func IsDNS1123Label(value string) bool

IsDNS1123Label tests for a string that conforms to the definition of a label in DNS (RFC 1123).

func IsDNS1123Subdomain added in v0.2.1

func IsDNS1123Subdomain(value string) bool

IsDNS1123Subdomain tests for a string that conforms to the definition of a subdomain in DNS (RFC 1123).

func IsDNS952Label

func IsDNS952Label(value string) bool

IsDNS952Label tests for a string that conforms to the definition of a label in DNS (RFC 952).

func IsProbableEOF added in v0.5.1

func IsProbableEOF(err error) bool

IsProbableEOF returns true if the given error resembles a connection termination scenario that would justify assuming that the watch is empty. These errors are what the Go http stack returns back to us which are general connection closure errors (strongly correlated) and callers that need to differentiate probable errors in connection behavior between normal "this is disconnected" should use the method.

func IsQualifiedName added in v0.2.1

func IsQualifiedName(value string) bool

func IsValidIPv4 added in v0.5.1

func IsValidIPv4(value string) bool

IsValidIPv4 tests that the argument is a valid IPv4 address.

func IsValidLabelValue added in v0.4.2

func IsValidLabelValue(value string) bool

func IsValidPortNum

func IsValidPortNum(port int) bool

IsValidPortNum tests that the argument is a valid, non-zero port number.

func JoinQualifiedName added in v0.2.2

func JoinQualifiedName(namespace, name string) string

Joins 'namespace' and 'name' and returns a fully qualified name Assumes that the input is valid.

func NewLogger

func NewLogger(prefix string) *log.Logger

NewLogger creates a new log.Logger which sends logs to glog.Info.

func NewUUID added in v0.2.1

func NewUUID() types.UID

*

* The UUID package is naive and can generate identical UUIDs if the time interval is quick enough.
* Block subsequent UUIDs for 200 Nanoseconds, the UUID uses 100 ns increments, we block for 200 to be safe
* Blocks in a go routine, so that the caller doesn't have to wait.
* TODO: save old unused UUIDs so that no one has to block.

func ObjectDiff

func ObjectDiff(a, b interface{}) string

ObjectDiff writes the two objects out as JSON and prints out the identical part of the objects followed by the remaining part of 'a' and finally the remaining part of 'b'. For debugging tests.

func ObjectGoPrintDiff

func ObjectGoPrintDiff(a, b interface{}) string

ObjectGoPrintDiff is like ObjectDiff, but uses go-spew to print the objects, which shows absolutely everything by recursing into every single pointer (go's %#v formatters OTOH stop at a certain point). This is needed when you can't figure out why reflect.DeepEqual is returning false and nothing is showing you differences. This will.

func ObjectGoPrintSideBySide added in v0.2.1

func ObjectGoPrintSideBySide(a, b interface{}) string

ObjectGoPrintSideBySide prints a and b as textual dumps side by side, enabling easy visual scanning for mismatches.

func RunInResourceContainer added in v0.5.1

func RunInResourceContainer(containerName string) error

Creates resource-only containerName if it does not already exist and moves the current process to it.

containerName must be an absolute container name.

func ShortenString added in v0.6.1

func ShortenString(str string, n int) string

func SplitPort added in v0.5.1

func SplitPort(id string) (name, port string, valid bool)

Takes a string of the form "name:port" or "name".

* If id is of the form "name" or "name:", then return (name, "", true)
* If id is of the form "name:port", then return (name, port, true)
* Otherwise, return ("", "", false)

Additionally, name must be non-empty or valid will be returned false.

Port is returned as a string, and it is not required to be numeric (could be used for a named port, for example).

func SplitQualifiedName added in v0.2.2

func SplitQualifiedName(str string) (string, string)

Splits a fully qualified name and returns its namespace and name. Assumes that the input 'str' has been validated.

func StringDiff

func StringDiff(a, b string) string

StringDiff diffs a and b and returns a human readable diff.

func UnescapeQualifiedNameForDisk added in v0.4.3

func UnescapeQualifiedNameForDisk(in string) string

UnescapeQualifiedNameForDisk converts an escaped plugin name (as per EscapeQualifiedNameForDisk) back to its normal form. This assumes that the input has already been validates as a qualified name.

func Until added in v0.2.1

func Until(f func(), period time.Duration, stopCh <-chan struct{})

Until loops until stop channel is closed, running f every period. Catches any panics, and keeps going. f may not be invoked if stop channel is already closed.

func WordSepNormalizeFunc added in v0.5.1

func WordSepNormalizeFunc(f *pflag.FlagSet, name string) pflag.NormalizedName

Types

type BoolFlag added in v0.2.2

type BoolFlag struct {
	// contains filtered or unexported fields
}

BoolFlag is a boolean flag compatible with flags and pflags that keeps track of whether it had a value supplied or not. Beware! If you use this type, you must actually specify --flag-name=true, you cannot leave it as --flag-name and still have the value set

func (*BoolFlag) Default added in v0.2.2

func (f *BoolFlag) Default(value bool)

func (BoolFlag) Provided added in v0.2.2

func (f BoolFlag) Provided() bool

func (*BoolFlag) Set added in v0.2.2

func (f *BoolFlag) Set(value string) error

func (BoolFlag) String added in v0.2.2

func (f BoolFlag) String() string

func (*BoolFlag) Type added in v0.2.2

func (f *BoolFlag) Type() string

func (BoolFlag) Value added in v0.2.2

func (f BoolFlag) Value() bool

type Cache added in v0.5.2

type Cache []*cacheShard

func NewCache added in v0.5.2

func NewCache(maxSize int) Cache

func (*Cache) Add added in v0.5.2

func (c *Cache) Add(index uint64, obj interface{}) bool

Returns true if object already existed, false otherwise.

func (*Cache) Get added in v0.5.2

func (c *Cache) Get(index uint64) (obj interface{}, found bool)

type Clock added in v0.2.1

type Clock interface {
	Now() time.Time
	Since(time.Time) time.Duration
}

Clock allows for injecting fake or real clocks into code that needs to do arbitrary things based on time.

type ConfigurationMap added in v0.2.1

type ConfigurationMap map[string]string

func (*ConfigurationMap) Set added in v0.2.1

func (m *ConfigurationMap) Set(value string) error

func (*ConfigurationMap) String added in v0.2.1

func (m *ConfigurationMap) String() string

func (*ConfigurationMap) Type added in v0.2.1

func (*ConfigurationMap) Type() string

type Empty added in v0.6.2

type Empty struct{}

Empty is public to allow deep copy generation on StringSet

type FakeClock added in v0.2.1

type FakeClock struct {
	Time time.Time
}

FakeClock implements Clock, but returns an arbitrary time.

func (*FakeClock) Now added in v0.2.1

func (f *FakeClock) Now() time.Time

Now returns f's time.

func (*FakeClock) Since added in v0.4.4

func (f *FakeClock) Since(ts time.Time) time.Duration

Since returns time since the time in f.

type FakeHandler

type FakeHandler struct {
	RequestReceived *http.Request
	RequestBody     string
	StatusCode      int
	ResponseBody    string
	// For logging - you can use a *testing.T
	// This will keep log messages associated with the test.
	T LogInterface
	// contains filtered or unexported fields
}

FakeHandler is to assist in testing HTTP requests. Notice that FakeHandler is not thread safe and you must not direct traffic to except for the request you want to test. You can do this by hiding it in an http.ServeMux.

func (*FakeHandler) ServeHTTP

func (f *FakeHandler) ServeHTTP(response http.ResponseWriter, request *http.Request)

func (*FakeHandler) ValidateRequest

func (f *FakeHandler) ValidateRequest(t TestInterface, expectedPath, expectedMethod string, body *string)

ValidateRequest verifies that FakeHandler received a request with expected path, method, and body.

func (*FakeHandler) ValidateRequestCount added in v0.2.1

func (f *FakeHandler) ValidateRequestCount(t TestInterface, count int) bool

type GlogWriter

type GlogWriter struct{}

GlogWriter serves as a bridge between the standard log package and the glog package.

func (GlogWriter) Write

func (writer GlogWriter) Write(data []byte) (n int, err error)

Write implements the io.Writer interface.

type IP

type IP net.IP

IP adapts net.IP for use as a flag.

func (*IP) Set

func (ip *IP) Set(value string) error

func (IP) String

func (ip IP) String() string

func (*IP) Type added in v0.2.1

func (*IP) Type() string

type IPNet

type IPNet net.IPNet

IPNet adapts net.IPNet for use as a flag.

func (*IPNet) Set

func (ipnet *IPNet) Set(value string) error

func (IPNet) String

func (ipnet IPNet) String() string

func (*IPNet) Type added in v0.2.1

func (*IPNet) Type() string

type IntOrString

type IntOrString struct {
	Kind   IntstrKind
	IntVal int
	StrVal string
}

IntOrString is a type that can hold an int or a string. When used in JSON or YAML marshalling and unmarshalling, it produces or consumes the inner type. This allows you to have, for example, a JSON field that can accept a name or number.

func NewIntOrStringFromInt

func NewIntOrStringFromInt(val int) IntOrString

NewIntOrStringFromInt creates an IntOrString object with an int value.

func NewIntOrStringFromString

func NewIntOrStringFromString(val string) IntOrString

NewIntOrStringFromString creates an IntOrString object with a string value.

func (*IntOrString) Fuzz added in v0.4.2

func (intstr *IntOrString) Fuzz(c fuzz.Continue)

func (IntOrString) MarshalJSON

func (intstr IntOrString) MarshalJSON() ([]byte, error)

MarshalJSON implements the json.Marshaller interface.

func (*IntOrString) String added in v0.2.1

func (intstr *IntOrString) String() string

String returns the string value, or Itoa's the int value.

func (*IntOrString) UnmarshalJSON

func (intstr *IntOrString) UnmarshalJSON(value []byte) error

UnmarshalJSON implements the json.Unmarshaller interface.

type IntstrKind

type IntstrKind int

IntstrKind represents the stored type of IntOrString.

const (
	IntstrInt    IntstrKind = iota // The IntOrString holds an int.
	IntstrString                   // The IntOrString holds a string.
)

type LogInterface

type LogInterface interface {
	Logf(format string, args ...interface{})
}

LogInterface is a simple interface to allow injection of Logf to report serving errors.

type PortRange added in v0.5.2

type PortRange struct {
	Base int
	Size int
}

PortRange represents a range of TCP/UDP ports. To represent a single port, set Size to 1.

func ParsePortRange added in v0.5.2

func ParsePortRange(value string) (*PortRange, error)

ParsePortRange parses a string of the form "min-max", inclusive at both ends, and initializs a new PortRange from it.

func (*PortRange) Contains added in v0.5.2

func (pr *PortRange) Contains(p int) bool

Contains tests whether a given port falls within the PortRange.

func (*PortRange) Set added in v0.5.2

func (pr *PortRange) Set(value string) error

Set parses a string of the form "min-max", inclusive at both ends, and sets the PortRange from it. This is part of the flag.Value and pflag.Value interfaces.

func (PortRange) String added in v0.5.2

func (pr PortRange) String() string

String converts the PortRange to a string representation, which can be parsed by PortRange.Set or ParsePortRange.

func (*PortRange) Type added in v0.5.2

func (*PortRange) Type() string

Type returns a descriptive string about this type. This is part of the pflag.Value interface.

type RateLimiter

type RateLimiter interface {
	// CanAccept returns true if the rate is below the limit, false otherwise
	CanAccept() bool
	// Accept returns once a token becomes available.
	Accept()
	// Stop stops the rate limiter, subsequent calls to CanAccept will return false
	Stop()
}

func NewFakeRateLimiter added in v0.4.4

func NewFakeRateLimiter() RateLimiter

func NewTokenBucketRateLimiter

func NewTokenBucketRateLimiter(qps float32, burst int) RateLimiter

NewTokenBucketRateLimiter creates a rate limiter which implements a token bucket approach. The rate limiter allows bursts of up to 'burst' to exceed the QPS, while still maintaining a smoothed qps rate of 'qps'. The bucket is initially filled with 'burst' tokens, the rate limiter spawns a go routine which refills the bucket with one token at a rate of 'qps'. The maximum number of tokens in the bucket is capped at 'burst'. When done with the limiter, Stop() must be called to halt the associated goroutine.

type RealClock added in v0.2.1

type RealClock struct{}

RealClock really calls time.Now()

func (RealClock) Now added in v0.2.1

func (r RealClock) Now() time.Time

Now returns the current time.

func (RealClock) Since added in v0.4.4

func (r RealClock) Since(ts time.Time) time.Duration

Since returns time since the specified timestamp.

type Route added in v0.4.2

type Route struct {
	Interface   string
	Destination net.IP
	Gateway     net.IP
}

type Runner added in v0.2.1

type Runner struct {
	// contains filtered or unexported fields
}

Runner is an abstraction to make it easy to start and stop groups of things that can be described by a single function which waits on a channel close to exit.

func NewRunner added in v0.2.1

func NewRunner(f ...func(stop chan struct{})) *Runner

NewRunner makes a runner for the given function(s). The function(s) should loop until the channel is closed.

func (*Runner) Start added in v0.2.1

func (r *Runner) Start()

Start begins running.

func (*Runner) Stop added in v0.2.1

func (r *Runner) Stop()

Stop stops running.

type StringFlag added in v0.2.2

type StringFlag struct {
	// contains filtered or unexported fields
}

StringFlag is a string flag compatible with flags and pflags that keeps track of whether it had a value supplied or not.

func NewStringFlag added in v0.5.2

func NewStringFlag(defaultVal string) StringFlag

func (*StringFlag) Default added in v0.2.2

func (f *StringFlag) Default(value string)

func (StringFlag) Provided added in v0.2.2

func (f StringFlag) Provided() bool

func (*StringFlag) Set added in v0.2.2

func (f *StringFlag) Set(value string) error

func (StringFlag) String added in v0.2.2

func (f StringFlag) String() string

func (*StringFlag) Type added in v0.2.2

func (f *StringFlag) Type() string

func (StringFlag) Value added in v0.2.2

func (f StringFlag) Value() string

type StringList

type StringList []string

func (*StringList) Set

func (sl *StringList) Set(value string) error

func (*StringList) String

func (sl *StringList) String() string

func (*StringList) Type added in v0.2.1

func (*StringList) Type() string

type StringSet

type StringSet map[string]Empty

StringSet is a set of strings, implemented via map[string]struct{} for minimal memory consumption.

func KeySet added in v0.3.3

func KeySet(theMap reflect.Value) StringSet

KeySet creates a StringSet from a keys of a map[string](? extends interface{}). Since you can't describe that map type in the Go type system the reflected value is required.

func NewStringSet

func NewStringSet(items ...string) StringSet

NewStringSet creates a StringSet from a list of values.

func (StringSet) Delete

func (s StringSet) Delete(items ...string)

Delete removes all items from the set.

func (StringSet) Difference added in v0.4.1

func (s StringSet) Difference(s2 StringSet) StringSet

Difference returns a set of objects that are not in s2 For example: s1 = {1, 2, 3} s2 = {1, 2, 4, 5} s1.Difference(s2) = {3} s2.Difference(s1) = {4, 5}

func (StringSet) Has

func (s StringSet) Has(item string) bool

Has returns true iff item is contained in the set.

func (StringSet) HasAll

func (s StringSet) HasAll(items ...string) bool

HasAll returns true iff all items are contained in the set.

func (StringSet) HasAny added in v0.5.1

func (s StringSet) HasAny(items ...string) bool

HasAny returns true if any items are contained in the set.

func (StringSet) Insert

func (s StringSet) Insert(items ...string)

Insert adds items to the set.

func (StringSet) IsSuperset

func (s1 StringSet) IsSuperset(s2 StringSet) bool

IsSuperset returns true iff s1 is a superset of s2.

func (StringSet) Len added in v0.2.1

func (s StringSet) Len() int

Len returns the size of the set.

func (StringSet) List

func (s StringSet) List() []string

List returns the contents as a sorted string slice.

func (StringSet) PopAny added in v0.5.2

func (s StringSet) PopAny() (string, bool)

Returns a single element from the set.

func (StringSet) Union added in v0.5.1

func (s1 StringSet) Union(s2 StringSet) StringSet

Union returns a new set which includes items in either s1 or s2. vof objects that are not in s2 For example: s1 = {1, 2} s2 = {3, 4} s1.Union(s2) = {1, 2, 3, 4} s2.Union(s1) = {1, 2, 3, 4}

type TestInterface

type TestInterface interface {
	Errorf(format string, args ...interface{})
	Logf(format string, args ...interface{})
}

TestInterface is a simple interface providing Errorf, to make injection for testing easier (insert 'yo dawg' meme here).

type Time

type Time struct {
	time.Time
}

Time is a wrapper around time.Time which supports correct marshaling to YAML and JSON. Wrappers are provided for many of the factory methods that the time package offers.

func Date

func Date(year int, month time.Month, day, hour, min, sec, nsec int, loc *time.Location) Time

Date returns the Time corresponding to the supplied parameters by wrapping time.Date.

func NewTime added in v0.2.1

func NewTime(time time.Time) Time

NewTime returns a wrapped instance of the provided time

func Now

func Now() Time

Now returns the current local time.

func Unix

func Unix(sec int64, nsec int64) Time

Unix returns the local time corresponding to the given Unix time by wrapping time.Unix.

func (Time) Before added in v0.4.2

func (t Time) Before(u Time) bool

Before reports whether the time instant t is before u.

func (*Time) Fuzz added in v0.4.2

func (t *Time) Fuzz(c fuzz.Continue)

Fuzz satisfies fuzz.Interface.

func (*Time) IsZero added in v0.4.2

func (t *Time) IsZero() bool

IsZero returns true if the value is nil or time is zero.

func (Time) MarshalJSON

func (t Time) MarshalJSON() ([]byte, error)

MarshalJSON implements the json.Marshaler interface.

func (Time) Rfc3339Copy

func (t Time) Rfc3339Copy() Time

Rfc3339Copy returns a copy of the Time at second-level precision.

func (*Time) UnmarshalJSON

func (t *Time) UnmarshalJSON(b []byte) error

UnmarshalJSON implements the json.Unmarshaller interface.

type Trace added in v0.5.3

type Trace struct {
	// contains filtered or unexported fields
}

func NewTrace added in v0.5.3

func NewTrace(name string) *Trace

func (*Trace) Log added in v0.5.3

func (t *Trace) Log()

func (*Trace) LogIfLong added in v0.5.3

func (t *Trace) LogIfLong(threshold time.Duration)

func (*Trace) Step added in v0.5.3

func (t *Trace) Step(msg string)

func (*Trace) TotalTime added in v0.5.3

func (t *Trace) TotalTime() time.Duration

Directories

Path Synopsis
Package config provides utility objects for decoupling sources of configuration and the actual configuration state.
Package config provides utility objects for decoupling sources of configuration and the actual configuration state.
Package errors implements various utility functions and types around errors.
Package errors implements various utility functions and types around errors.
Package exec provides an injectable interface and implementations for running commands.
Package exec provides an injectable interface and implementations for running commands.
Package flushwriter implements a wrapper for a writer that flushes on every write if that writer implements the io.Flusher interface
Package flushwriter implements a wrapper for a writer that flushes on every write if that writer implements the io.Flusher interface
Package httpstream adds multiplexed streaming support to HTTP requests and responses via connection upgrades.
Package httpstream adds multiplexed streaming support to HTTP requests and responses via connection upgrades.
Package iptables provides an interface and implementations for running iptables commands.
Package iptables provides an interface and implementations for running iptables commands.
Package mount defines an interface to mounting filesystems.
Package mount defines an interface to mounting filesystems.
Package proxy provides transport and upgrade support for proxies
Package proxy provides transport and upgrade support for proxies
Package slice provides utility methods for common operations on slices.
Package slice provides utility methods for common operations on slices.
Package wait provides tools for polling or listening for changes to a condition.
Package wait provides tools for polling or listening for changes to a condition.
Package workqueue provides a simple queue that supports the following features: * Fair: items processed in the order in which they are added.
Package workqueue provides a simple queue that supports the following features: * Fair: items processed in the order in which they are added.

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