fx

package
v0.0.0-...-9a9fc0b Latest Latest
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 Go to latest Published: Dec 21, 2023 License: MIT Imports: 11 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	// ErrCanceled is the error returned when the context is canceled.
	ErrCanceled = context.Canceled
	// ErrTimeout is the error returned when the context's deadline passes.
	ErrTimeout = context.DeadlineExceeded
)

Functions

func DoWithRetry 

func DoWithRetry(fn func() error, opts ...RetryOption) error

DoWithRetry runs fn, and retries if failed. Default to retry 3 times. Note that if the fn function accesses global variables outside the function and performs modification operations, it is best to lock them, otherwise there may be data race issues

func DoWithRetryCtx 

func DoWithRetryCtx(ctx context.Context, fn func(ctx context.Context, retryCount int) error,
	opts ...RetryOption) error

DoWithRetryCtx runs fn, and retries if failed. Default to retry 3 times. fn retryCount indicates the current number of retries, starting from 0 Note that if the fn function accesses global variables outside the function and performs modification operations, it is best to lock them, otherwise there may be data race issues

func DoWithTimeout 

func DoWithTimeout(fn func() error, timeout time.Duration, opts ...DoOption) error

DoWithTimeout runs fn with timeout control.

func Parallel 

func Parallel(fns ...func())

Parallel runs fns parallelly and waits for done.

Types

type DoOption 

type DoOption func() context.Context

DoOption defines the method to customize a DoWithTimeout call.

func WithContext 

func WithContext(ctx context.Context) DoOption

WithContext customizes a DoWithTimeout call with given ctx.

type FilterFunc 

type FilterFunc func(item any) bool

FilterFunc defines the method to filter a Stream.

type ForAllFunc 

type ForAllFunc func(pipe <-chan any)

ForAllFunc defines the method to handle all elements in a Stream.

type ForEachFunc 

type ForEachFunc func(item any)

ForEachFunc defines the method to handle each element in a Stream.

type GenerateFunc 

type GenerateFunc func(source chan<- any)

GenerateFunc defines the method to send elements into a Stream.

type KeyFunc 

type KeyFunc func(item any) any

KeyFunc defines the method to generate keys for the elements in a Stream.

type LessFunc 

type LessFunc func(a, b any) bool

LessFunc defines the method to compare the elements in a Stream.

type MapFunc 

type MapFunc func(item any) any

MapFunc defines the method to map each element to another object in a Stream.

type Option 

type Option func(opts *rxOptions)

Option defines the method to customize a Stream.

func UnlimitedWorkers 

func UnlimitedWorkers() Option

UnlimitedWorkers lets the caller use as many workers as the tasks.

func WithWorkers 

func WithWorkers(workers int) Option

WithWorkers lets the caller customize the concurrent workers.

type ParallelFunc 

type ParallelFunc func(item any)

ParallelFunc defines the method to handle elements parallelly.

type ReduceFunc 

type ReduceFunc func(pipe <-chan any) (any, error)

ReduceFunc defines the method to reduce all the elements in a Stream.

type RetryOption 

type RetryOption func(*retryOptions)

RetryOption defines the method to customize DoWithRetry.

func WithInterval 

func WithInterval(interval time.Duration) RetryOption

func WithRetry 

func WithRetry(times int) RetryOption

WithRetry customize a DoWithRetry call with given retry times.

func WithTimeout 

func WithTimeout(timeout time.Duration) RetryOption

type Stream 

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

A Stream is a stream that can be used to do stream processing.

func Concat 

func Concat(s Stream, others ...Stream) Stream

Concat returns a concatenated Stream.

func From 

func From(generate GenerateFunc) Stream

From constructs a Stream from the given GenerateFunc.

func Just 

func Just(items ...any) Stream

Just converts the given arbitrary items to a Stream.

func Range 

func Range(source <-chan any) Stream

Range converts the given channel to a Stream.

func (Stream) AllMach 

func (s Stream) AllMach(predicate func(item any) bool) bool

AllMach returns whether all elements of this stream match the provided predicate. May not evaluate the predicate on all elements if not necessary for determining the result. If the stream is empty then true is returned and the predicate is not evaluated.

func (Stream) AnyMach 

func (s Stream) AnyMach(predicate func(item any) bool) bool

AnyMach returns whether any elements of this stream match the provided predicate. May not evaluate the predicate on all elements if not necessary for determining the result. If the stream is empty then false is returned and the predicate is not evaluated.

func (Stream) Buffer 

func (s Stream) Buffer(n int) Stream

Buffer buffers the items into a queue with size n. It can balance the producer and the consumer if their processing throughput don't match.

func (Stream) Concat 

func (s Stream) Concat(others ...Stream) Stream

Concat returns a Stream that concatenated other streams

func (Stream) Count 

func (s Stream) Count() (count int)

Count counts the number of elements in the result.

func (Stream) Distinct 

func (s Stream) Distinct(fn KeyFunc) Stream

Distinct removes the duplicated items base on the given KeyFunc.

func (Stream) Done 

func (s Stream) Done()

Done waits all upstreaming operations to be done.

func (Stream) Filter 

func (s Stream) Filter(fn FilterFunc, opts ...Option) Stream

Filter filters the items by the given FilterFunc.

func (Stream) First 

func (s Stream) First() any

First returns the first item, nil if no items.

func (Stream) ForAll 

func (s Stream) ForAll(fn ForAllFunc)

ForAll handles the streaming elements from the source and no later streams.

func (Stream) ForEach 

func (s Stream) ForEach(fn ForEachFunc)

ForEach seals the Stream with the ForEachFunc on each item, no successive operations.

func (Stream) Group 

func (s Stream) Group(fn KeyFunc) Stream

Group groups the elements into different groups based on their keys.

func (Stream) Head 

func (s Stream) Head(n int64) Stream

Head returns the first n elements in p.

func (Stream) Last 

func (s Stream) Last() (item any)

Last returns the last item, or nil if no items.

func (Stream) Map 

func (s Stream) Map(fn MapFunc, opts ...Option) Stream

Map converts each item to another corresponding item, which means it's a 1:1 model.

func (Stream) Max 

func (s Stream) Max(less LessFunc) any

Max returns the maximum item from the underlying source.

func (Stream) Merge 

func (s Stream) Merge() Stream

Merge merges all the items into a slice and generates a new stream.

func (Stream) Min 

func (s Stream) Min(less LessFunc) any

Min returns the minimum item from the underlying source.

func (Stream) NoneMatch 

func (s Stream) NoneMatch(predicate func(item any) bool) bool

NoneMatch returns whether all elements of this stream don't match the provided predicate. May not evaluate the predicate on all elements if not necessary for determining the result. If the stream is empty then true is returned and the predicate is not evaluated.

func (Stream) Parallel 

func (s Stream) Parallel(fn ParallelFunc, opts ...Option)

Parallel applies the given ParallelFunc to each item concurrently with given number of workers.

func (Stream) Reduce 

func (s Stream) Reduce(fn ReduceFunc) (any, error)

Reduce is an utility method to let the caller deal with the underlying channel.

func (Stream) Reverse 

func (s Stream) Reverse() Stream

Reverse reverses the elements in the stream.

func (Stream) Skip 

func (s Stream) Skip(n int64) Stream

Skip returns a Stream that skips size elements.

func (Stream) Sort 

func (s Stream) Sort(less LessFunc) Stream

Sort sorts the items from the underlying source.

func (Stream) Split 

func (s Stream) Split(n int) Stream

Split splits the elements into chunk with size up to n, might be less than n on tailing elements.

func (Stream) Tail 

func (s Stream) Tail(n int64) Stream

Tail returns the last n elements in p.

func (Stream) Walk 

func (s Stream) Walk(fn WalkFunc, opts ...Option) Stream

Walk lets the callers handle each item, the caller may write zero, one or more items base on the given item.

type WalkFunc 

type WalkFunc func(item any, pipe chan<- any)

WalkFunc defines the method to walk through all the elements in a Stream.

Source Files

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