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add task

This commit is contained in:
a 2022-03-26 21:42:22 -05:00
parent 2fcdc91587
commit 489bc792e1
4 changed files with 85 additions and 103 deletions
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60
examples/generic_pr/main.go
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@ -1,60 +0,0 @@
package main
import (
"encoding/json"
"fmt"
"log"
"net/http"
"git.tuxpa.in/a/lambda"
"git.tuxpa.in/a/lambda/parallel"
)
type RequestContext[T any] struct {
req http.Request
ans T
err error
}
func (r *RequestContext[T]) String() string {
return fmt.Sprintf("%+v", r.ans)
}
func (_ *RequestContext[T]) Do() func(r *RequestContext[T]) *RequestContext[T] {
return func(r *RequestContext[T]) *RequestContext[T] {
r.ans = *new(T)
res, err := http.DefaultClient.Do(&r.req)
if err != nil {
r.err = err
return r
}
defer res.Body.Close()
r.err = json.NewDecoder(res.Body).Decode(&r.ans)
return r
}
}
func (_ *RequestContext[T]) FilterErr() func(r *RequestContext[T]) bool {
return func(r *RequestContext[T]) bool {
return r.err == nil
}
}
type someResult struct {
Title string `json:"title"`
Id int `json:"id"`
}
func main() {
var requests = make([]*RequestContext[someResult], 20)
for i := range requests {
r, _ := http.NewRequest("GET", fmt.Sprintf("https://jsonplaceholder.typicode.com/todos/%d", i+1), nil)
requests[i] = &RequestContext[someResult]{
req: *r,
}
}
results := lambda.Filter(parallel.Map(requests, requests[0].Do(), 4), requests[0].FilterErr())
for _, v := range results {
log.Printf("%s", v)
}
}

30
examples/http_request_example/main.go Normal file
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@ -0,0 +1,30 @@
package main
import (
"fmt"
"log"
"net/http"
"git.tuxpa.in/a/lambda"
"git.tuxpa.in/a/lambda/parallel"
"git.tuxpa.in/a/lambda/task"
)
type someResult struct {
Title string `json:"title"`
Id int `json:"id"`
}
func main() {
var requests = make([]*task.HttpRequest[someResult], 20)
for i := range requests {
r, _ := http.NewRequest("GET", fmt.Sprintf("https://jsonplaceholder.typicode.com/todos/%d", i+1), nil)
requests[i] = &task.HttpRequest[someResult]{
Req: *r,
}
}
results := lambda.Filter(parallel.Map(requests, requests[0].Json(), 4), requests[0].NoErr())
for _, v := range results {
log.Printf("%s", v)
}
}

43
examples/parallel_request/main.go
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@ -1,43 +0,0 @@
package main
import (
"encoding/json"
"fmt"
"log"
"net/http"
"git.tuxpa.in/a/lambda/parallel"
)
type someResult struct {
Title string `json:"title"`
Id int `json:"id"`
}
func main() {
var requests = make([]*http.Request, 20)
for i := range requests {
r, _ := http.NewRequest("GET", fmt.Sprintf("https://jsonplaceholder.typicode.com/todos/%d", i), nil)
requests[i] = r
}
results, errs := parallel.MapErrorV(requests, func(r *http.Request) (*someResult, error) {
out := &someResult{}
res, err := http.DefaultClient.Do(r)
if err != nil {
return nil, err
}
defer res.Body.Close()
err = json.NewDecoder(res.Body).Decode(out)
return out, err
}, 4)
for i, v := range results {
if errs[i] != nil {
log.Printf("err: %s", errs[i])
} else {
log.Printf("result: %+v", v)
}
}
}

55
task/http_request.go Normal file
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@ -0,0 +1,55 @@
package task
import (
"encoding/json"
"fmt"
"io"
"net/http"
)
type DecoderFunc func(r io.Reader) Decoder
type Decoder interface {
Decode(any) error
}
type HttpRequest[T any] struct {
Req http.Request
ans T
err error
}
func (r *HttpRequest[T]) String() string {
return fmt.Sprintf("%+v", r.ans)
}
func (_ *HttpRequest[T]) With(df DecoderFunc) func(r *HttpRequest[T]) *HttpRequest[T] {
return func(r *HttpRequest[T]) *HttpRequest[T] {
r.ans = *new(T)
res, err := http.DefaultClient.Do(&r.Req)
if err != nil {
r.err = err
return r
}
defer res.Body.Close()
r.err = df(res.Body).Decode(&r.ans)
return r
}
}
func (z *HttpRequest[T]) Json() func(r *HttpRequest[T]) *HttpRequest[T] {
return z.With(func(r io.Reader) Decoder {
return json.NewDecoder(r)
})
}
func (_ *HttpRequest[T]) NoErr() func(r *HttpRequest[T]) bool {
return func(r *HttpRequest[T]) bool {
return r.err == nil
}
}
type someResult struct {
Title string `json:"title"`
Id int `json:"id"`
}