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parallelExecution.go
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parallelExecution.go
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// Copyright 2015 ThoughtWorks, Inc.
// This file is part of Gauge.
// Gauge is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Gauge is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Gauge. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"github.com/getgauge/gauge/gauge_messages"
"github.com/getgauge/gauge/logger"
"runtime"
"strconv"
"time"
)
type parallelSpecExecution struct {
manifest *manifest
specifications []*specification
pluginHandler *pluginHandler
currentExecutionInfo *gauge_messages.ExecutionInfo
runner *testRunner
aggregateResult *suiteResult
numberOfExecutionStreams int
writer executionLogger
}
type specCollection struct {
specs []*specification
}
type parallelInfo struct {
inParallel bool
numberOfStreams int
}
func (self *parallelInfo) isValid() bool {
if self.numberOfStreams < 1 {
logger.Log.Error("Invalid input(%s) to --n flag", strconv.Itoa(self.numberOfStreams))
return false
}
return true
}
func (e *parallelSpecExecution) start() *suiteResult {
startTime := time.Now()
specCollections := e.distributeSpecs(e.numberOfExecutionStreams)
suiteResultChannel := make(chan *suiteResult, len(specCollections))
for i, specCollection := range specCollections {
go e.startSpecsExecution(specCollection, suiteResultChannel, nil, newParallelExecutionConsoleWriter(i+1))
}
e.writer.Info("Executing in %s parallel streams.", strconv.Itoa(len(specCollections)))
suiteResults := make([]*suiteResult, 0)
for _, _ = range specCollections {
suiteResults = append(suiteResults, <-suiteResultChannel)
}
e.aggregateResult = e.aggregateResults(suiteResults)
e.aggregateResult.executionTime = int64(time.Since(startTime) / 1e6)
return e.aggregateResult
}
func (e *parallelSpecExecution) startSpecsExecution(specCollection *specCollection, suiteResults chan *suiteResult, runner *testRunner, writer executionLogger) {
var err error
runner, err = startRunnerAndMakeConnection(e.manifest, writer)
if err != nil {
e.writer.Error("Failed: " + err.Error())
e.writer.Debug("Skipping %s specifications", strconv.Itoa(len(specCollection.specs)))
suiteResults <- &suiteResult{}
return
}
e.startSpecsExecutionWithRunner(specCollection, suiteResults, runner, writer)
}
func (e *parallelSpecExecution) startSpecsExecutionWithRunner(specCollection *specCollection, suiteResults chan *suiteResult, runner *testRunner, writer executionLogger) {
execution := newExecution(e.manifest, specCollection.specs, runner, e.pluginHandler, ¶llelInfo{inParallel: false}, writer)
result := execution.start()
runner.kill(e.writer)
suiteResults <- result
}
func (e *parallelSpecExecution) distributeSpecs(distributions int) []*specCollection {
if distributions > len(e.specifications) {
distributions = len(e.specifications)
}
specCollections := make([]*specCollection, distributions)
for i := 0; i < len(e.specifications); i++ {
mod := i % distributions
if specCollections[mod] == nil {
specCollections[mod] = &specCollection{specs: make([]*specification, 0)}
}
specCollections[mod].specs = append(specCollections[mod].specs, e.specifications[i])
}
return specCollections
}
func (e *parallelSpecExecution) finish() {
message := &gauge_messages.Message{MessageType: gauge_messages.Message_SuiteExecutionResult.Enum(),
SuiteExecutionResult: &gauge_messages.SuiteExecutionResult{SuiteResult: convertToProtoSuiteResult(e.aggregateResult)}}
e.pluginHandler.notifyPlugins(message)
e.pluginHandler.gracefullyKillPlugins()
}
func (e *parallelSpecExecution) aggregateResults(suiteResults []*suiteResult) *suiteResult {
aggregateResult := &suiteResult{isFailed: false, specResults: make([]*specResult, 0)}
for _, result := range suiteResults {
aggregateResult.executionTime += result.executionTime
aggregateResult.specsFailedCount += result.specsFailedCount
aggregateResult.specResults = append(aggregateResult.specResults, result.specResults...)
if result.isFailed {
aggregateResult.isFailed = true
}
if result.preSuite != nil {
aggregateResult.preSuite = result.preSuite
}
if result.postSuite != nil {
aggregateResult.postSuite = result.postSuite
}
}
return aggregateResult
}
func numberOfCores() int {
return runtime.NumCPU()
}