Simple memory testing for gae/wrapper

go/src/infra/gae/libs/wrapper/memory/taskqueueData.go

Index: go/src/infra/gae/libs/wrapper/memory/taskqueueData.go
diff --git a/go/src/infra/gae/libs/wrapper/memory/taskqueueData.go b/go/src/infra/gae/libs/wrapper/memory/taskqueueData.go
new file mode 100644
index 0000000000000000000000000000000000000000..fd21ad97c7b2940ee805e27976d032f8948d2dce
--- /dev/null
+++ b/go/src/infra/gae/libs/wrapper/memory/taskqueueData.go
@@ -0,0 +1,269 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package memory
+
+import (
+	"errors"
+	"fmt"
+	"math/rand"
+	"net/http"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"appengine/datastore"
+	"appengine/taskqueue"
+	pb "appengine_internal/taskqueue"
+
+	"infra/gae/libs/wrapper"
+)
+
+var (
+	currentNamespace = http.CanonicalHeaderKey("X-AppEngine-Current-Namespace")
+	defaultNamespace = http.CanonicalHeaderKey("X-AppEngine-Default-Namespace")
+)
+
+//////////////////////////////// taskQueueData /////////////////////////////////
+
+type taskQueueData struct {
+	sync.Mutex
+	*wrapper.BrokenFeatures
+
+	named    wrapper.QueueData
+	archived wrapper.QueueData
+}
+
+////////////////////////////// New(taskQueueData) //////////////////////////////
+
+func newTaskQueueData() memContextObj {
+	return &taskQueueData{
+		BrokenFeatures: wrapper.NewBrokenFeatures(
+			newTQError(pb.TaskQueueServiceError_TRANSIENT_ERROR)),
+		named:    wrapper.QueueData{"default": {}},
+		archived: wrapper.QueueData{"default": {}},
+	}
+}
+
+///////////////////////// memContextObj(taskQueueData) /////////////////////////
+
+func (t *taskQueueData) canApplyTxn(obj memContextObj) bool { return true }
+func (t *taskQueueData) endTxn()                            {}
+func (t *taskQueueData) applyTxn(rnd *rand.Rand, obj memContextObj) {
+	txn := obj.(*txnTaskQueueData)
+	for qn, tasks := range txn.anony {
+		for _, tsk := range tasks {
+			tsk.Name = mkName(rnd, tsk.Name, t.named[qn])
+			t.named[qn][tsk.Name] = tsk
+		}
+	}
+	txn.anony = nil
+}
+func (t *taskQueueData) mkTxn(*datastore.TransactionOptions) (memContextObj, error) {
+	return &txnTaskQueueData{
+		BrokenFeatures: t.BrokenFeatures,
+		parent:         t,
+		anony:          wrapper.AnonymousQueueData{},
+	}, nil
+}
+
+////////////////////// wrapper.TQTestable(taskQueueData) ///////////////////////
+
+func (t *taskQueueData) GetTransactionTasks() wrapper.AnonymousQueueData {
+	return nil
+}
+
+func (t *taskQueueData) AddQueue(queueName string) {
+	t.Lock()
+	defer t.Unlock()
+
+	if _, ok := t.named[queueName]; ok {
+		panic(fmt.Errorf("memory/taskqueue: cannot add the same queue twice! %q", queueName))
+	}
+	t.named[queueName] = map[string]*taskqueue.Task{}
+	t.archived[queueName] = map[string]*taskqueue.Task{}
+}
+
+func (t *taskQueueData) GetScheduledTasks() wrapper.QueueData {
+	t.Lock()
+	defer t.Unlock()
+
+	return dupQueue(t.named)
+}
+
+func (t *taskQueueData) GetTombstonedTasks() wrapper.QueueData {
+	t.Lock()
+	defer t.Unlock()
+
+	return dupQueue(t.archived)
+}
+
+func (t *taskQueueData) resetTasksWithLock() {
+	for queuename := range t.named {
+		t.named[queuename] = map[string]*taskqueue.Task{}
+		t.archived[queuename] = map[string]*taskqueue.Task{}
+	}
+}
+
+func (t *taskQueueData) ResetTasks() {
+	t.Lock()
+	defer t.Unlock()
+
+	t.resetTasksWithLock()
+}
+
+/////////////////////////// taskQueueData (private) ////////////////////////////
+
+func (t *taskQueueData) getQueueName(queueName string) (string, error) {
+	if queueName == "" {
+		queueName = "default"
+	}
+	if _, ok := t.named[queueName]; !ok {
+		return "", newTQError(pb.TaskQueueServiceError_UNKNOWN_QUEUE)
+	}
+	return queueName, nil
+}
+
+func (t *taskQueueData) prepTask(ns string, task *taskqueue.Task, queueName string, now time.Time, rnd *rand.Rand) (*taskqueue.Task, string, error) {
+	queueName, err := t.getQueueName(queueName)
+	if err != nil {
+		return nil, "", err
+	}
+
+	toSched := dupTask(task)
+
+	if toSched.Path == "" {
+		return nil, "", newTQError(pb.TaskQueueServiceError_INVALID_URL)
+	}
+
+	if toSched.ETA.IsZero() {
+		toSched.ETA = now.Add(toSched.Delay)
+	} else if toSched.Delay != 0 {
+		panic("taskqueue: both Delay and ETA are set")
+	}
+	toSched.Delay = 0
+
+	if toSched.Method == "" {
+		toSched.Method = "POST"
+	}
+	if _, ok := pb.TaskQueueAddRequest_RequestMethod_value[toSched.Method]; !ok {
+		return nil, "", fmt.Errorf("taskqueue: bad method %q", toSched.Method)
+	}
+	if toSched.Method != "POST" && toSched.Method != "PUT" {
+		toSched.Payload = nil
+	}
+
+	if _, ok := toSched.Header[currentNamespace]; !ok {
+		if ns != "" {
+			if toSched.Header == nil {
+				toSched.Header = http.Header{}
+			}
+			toSched.Header[currentNamespace] = []string{ns}
+		}
+	}
+	// TODO(riannucci): implement DefaultNamespace
+
+	if toSched.Name == "" {
+		toSched.Name = mkName(rnd, "", t.named[queueName])
+	} else {
+		if !validTaskName.MatchString(toSched.Name) {
+			return nil, "", newTQError(pb.TaskQueueServiceError_INVALID_TASK_NAME)
+		}
+	}
+
+	return toSched, queueName, nil
+}
+
+/////////////////////////////// txnTaskQueueData ///////////////////////////////
+
+type txnTaskQueueData struct {
+	*wrapper.BrokenFeatures
+
+	lock sync.Mutex
+
+	// boolean 0 or 1, use atomic.*Int32 to access.
+	closed int32
+	anony  wrapper.AnonymousQueueData
+	parent *taskQueueData
+}
+
+/////////////////////// memContextObj(txnTaskQueueData) ////////////////////////
+
+func (t *txnTaskQueueData) canApplyTxn(obj memContextObj) bool { return false }
+
+func (t *txnTaskQueueData) applyTxn(*rand.Rand, memContextObj) {
+	panic(errors.New("txnTaskQueueData.applyTxn is not implemented"))
+}
+
+func (t *txnTaskQueueData) mkTxn(*datastore.TransactionOptions) (memContextObj, error) {
+	return nil, errors.New("txnTaskQueueData.mkTxn is not implemented")
+}
+
+func (t *txnTaskQueueData) endTxn() {
+	if atomic.LoadInt32(&t.closed) == 1 {
+		panic("cannot end transaction twice")
+	}
+	atomic.StoreInt32(&t.closed, 1)
+}
+
+/////////////////// wrapper.BrokenFeatures(txnTaskQueueData) ///////////////////
+
+func (t *txnTaskQueueData) IsBroken() error {
+	// Slightly different from the SDK... datastore and taskqueue each implement
+	// this here, where in the SDK only datastore.transaction.Call does.
+	if atomic.LoadInt32(&t.closed) == 1 {
+		return fmt.Errorf("taskqueue: transaction context has expired")
+	}
+	return t.parent.IsBroken()
+}
+
+///////////////////// wrapper.TQTestable(txnTaskQueueData) /////////////////////
+
+func (t *txnTaskQueueData) ResetTasks() {
+	t.Lock()
+	defer t.Unlock()
+
+	for queuename := range t.anony {
+		t.anony[queuename] = []*taskqueue.Task{}
+	}
+	t.parent.resetTasksWithLock()
+}
+
+func (t *txnTaskQueueData) Lock() {
+	t.lock.Lock()
+	t.parent.Lock()
+}
+func (t *txnTaskQueueData) Unlock() {
+	t.parent.Unlock()
+	t.lock.Unlock()
+}
+
+func (t *txnTaskQueueData) GetTransactionTasks() wrapper.AnonymousQueueData {
+	t.Lock()
+	defer t.Unlock()
+
+	ret := make(wrapper.AnonymousQueueData, len(t.anony))
+	for k, vs := range t.anony {
+		ret[k] = make([]*taskqueue.Task, len(vs))
+		for i, v := range vs {
+			tsk := dupTask(v)
+			tsk.Name = ""
+			ret[k][i] = tsk
+		}
+	}
+
+	return ret
+}
+
+func (t *txnTaskQueueData) GetTombstonedTasks() wrapper.QueueData {
+	return t.parent.GetTombstonedTasks()
+}
+
+func (t *txnTaskQueueData) GetScheduledTasks() wrapper.QueueData {
+	return t.parent.GetScheduledTasks()
+}
+
+func (t *txnTaskQueueData) AddQueue(queueName string) {
+	t.parent.AddQueue(queueName)
+}