/
executor.go
73 lines (64 loc) · 2.19 KB
/
executor.go
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// Copyright (c) 2017-2018 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package broker
import (
"context"
"github.com/uber/aresdb/broker/common"
"github.com/uber/aresdb/cluster/topology"
dataCli "github.com/uber/aresdb/datanode/client"
memCom "github.com/uber/aresdb/memstore/common"
queryCom "github.com/uber/aresdb/query/common"
"net/http"
"time"
)
const (
executorTimeoutSeconds = 30
)
// NewQueryExecutor creates a new QueryExecutor
func NewQueryExecutor(tsr memCom.TableSchemaReader, topo topology.HealthTrackingDynamicTopoloy, client dataCli.DataNodeQueryClient) common.QueryExecutor {
return &queryExecutorImpl{
tableSchemaReader: tsr,
topo: topo,
dataNodeClient: client,
}
}
// queryExecutorImpl will be reused across all queries
type queryExecutorImpl struct {
tableSchemaReader memCom.TableSchemaReader
topo topology.HealthTrackingDynamicTopoloy
dataNodeClient dataCli.DataNodeQueryClient
}
func (qe *queryExecutorImpl) Execute(ctx context.Context, requestID string, aql *queryCom.AQLQuery, returnHLLBinary bool, w http.ResponseWriter) (err error) {
var cancelFn context.CancelFunc
ctx, cancelFn = context.WithTimeout(ctx, time.Duration(executorTimeoutSeconds)*time.Second)
defer cancelFn()
// compile
qc := NewQueryContext(aql, returnHLLBinary, w)
qc.Compile(qe.tableSchemaReader)
if qc.Error != nil {
err = qc.Error
return
}
// execute
var queryPlan common.QueryPlan
if qc.IsNonAggregationQuery {
queryPlan, err = NewNonAggQueryPlan(qc, qe.topo, qe.dataNodeClient)
} else {
queryPlan, err = NewAggQueryPlan(qc, qe.topo, qe.dataNodeClient)
}
if err != nil {
return
}
return queryPlan.Execute(ctx, w)
}