engine.go

// Copyright (c) 2019 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package native

import (
	"time"

	"github.com/m3db/m3/src/query/graphite/context"
	"github.com/m3db/m3/src/query/graphite/storage"
)

// The Engine for running queries.
type Engine struct {
	storage storage.Storage
}

// NewEngine creates a new query engine.
func NewEngine(store storage.Storage) *Engine {
	return &Engine{
		storage: store,
	}
}

// FetchByQuery retrieves one or more time series based on a query.
func (e *Engine) FetchByQuery(
	ctx context.Context,
	query string,
	start, end time.Time,
	timeout time.Duration,
) (*storage.FetchResult, error) {
	return e.storage.FetchByQuery(
		ctx,
		query,
		storage.FetchOptions{
			StartTime: start,
			EndTime:   end,
			DataOptions: storage.DataOptions{
				Timeout: timeout,
			},
		},
	)
}

// Compile compiles an expression from an expression string
func (e *Engine) Compile(s string) (Expression, error) {
	return compile(s)
}