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// Copyright (C) MongoDB, Inc. 2017-present.
//
// 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
package integration
import (
"fmt"
"sync"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/internal/testutil/assert"
"go.mongodb.org/mongo-driver/mongo/integration/mtest"
)
// Helper functions for the operations in the unified spec test runner that require creating and synchronizing
// background goroutines.
// backgroundRoutine represents a background goroutine that can execute operations. The goroutine reads operations from
// a channel and executes them in order. It exits when an operation with name exitRoutineOperationName is read. If any
// of the operations error, all future operations passed to the routine are skipped. The first error is reported by the
// stop() function.
type backgroundRoutine struct {
operations chan *operation
mt *mtest.T
testCase *testCase
wg sync.WaitGroup
err error
}
func newBackgroundRoutine(mt *mtest.T, testCase *testCase) *backgroundRoutine {
routine := &backgroundRoutine{
operations: make(chan *operation, 10),
mt: mt,
testCase: testCase,
}
return routine
}
func (b *backgroundRoutine) start() {
b.wg.Add(1)
go func() {
defer b.wg.Done()
for op := range b.operations {
if b.err != nil {
continue
}
if err := runOperation(b.mt, b.testCase, op, nil, nil); err != nil {
b.err = fmt.Errorf("error running operation %s: %v", op.Name, err)
}
}
}()
}
func (b *backgroundRoutine) stop() error {
close(b.operations)
b.wg.Wait()
return b.err
}
func (b *backgroundRoutine) addOperation(op *operation) bool {
select {
case b.operations <- op:
return true
default:
return false
}
}
func startThread(mt *mtest.T, testCase *testCase, op *operation) {
routine := newBackgroundRoutine(mt, testCase)
testCase.routinesMap.Store(getThreadName(op), routine)
routine.start()
}
func runOnThread(mt *mtest.T, testCase *testCase, op *operation) {
routineName := getThreadName(op)
routineVal, ok := testCase.routinesMap.Load(routineName)
assert.True(mt, ok, "no background routine found with name %s", routineName)
routine := routineVal.(*backgroundRoutine)
var routineOperation operation
operationDoc := op.Arguments.Lookup("operation")
err := bson.UnmarshalWithRegistry(specTestRegistry, operationDoc.Document(), &routineOperation)
assert.Nil(mt, err, "error creating operation for runOnThread: %v", err)
ok = routine.addOperation(&routineOperation)
assert.True(mt, ok, "failed to add operation %s to routine %s", routineOperation.Name, routineName)
}
func waitForThread(mt *mtest.T, testCase *testCase, op *operation) {
name := getThreadName(op)
routineVal, ok := testCase.routinesMap.Load(name)
assert.True(mt, ok, "no background routine found with name %s", name)
err := routineVal.(*backgroundRoutine).stop()
testCase.routinesMap.Delete(name)
assert.Nil(mt, err, "error on background routine %s: %v", name, err)
}
func getThreadName(op *operation) string {
return op.Arguments.Lookup("name").StringValue()
}
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