goweb/cqrs/query.go

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2020-04-16 16:32:02 +02:00
package cqrs
import (
"context"
"github.com/google/uuid"
)
type QueryID string
type QueryRequest interface{}
type Query interface {
ID() QueryID
Request() QueryRequest
}
type BaseQuery struct {
id QueryID
req QueryRequest
}
func (q *BaseQuery) ID() QueryID {
return q.id
}
func (q *BaseQuery) Request() QueryRequest {
return q.req
}
func NewBaseQuery(req QueryRequest) *BaseQuery {
id := QueryID(uuid.New().String())
return &BaseQuery{id, req}
}
type QueryResult interface {
Query() Query
Data() interface{}
}
type BaseQueryResult struct {
qry Query
data interface{}
}
func (r *BaseQueryResult) Query() Query {
return r.qry
}
func (r *BaseQueryResult) Data() interface{} {
return r.data
}
func NewBaseQueryResult(qry Query, data interface{}) *BaseQueryResult {
return &BaseQueryResult{qry, data}
}
type QueryHandlerFunc func(context.Context, Query) (interface{}, error)
func (h QueryHandlerFunc) Handle(ctx context.Context, qry Query) (interface{}, error) {
return h(ctx, qry)
}
type QueryHandler interface {
Handle(context.Context, Query) (interface{}, error)
}