[Sync] Make generic non-frontend thread datatype controller.

chrome/browser/sync/glue/password_data_type_controller.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/sync/glue/password_data_type_controller.h"
 
 #include "base/metrics/histogram.h"
-#include "base/logging.h"
 #include "base/task.h"
-#include "base/time.h"
 #include "chrome/browser/password_manager/password_store.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/sync/glue/password_change_processor.h"
-#include "chrome/browser/sync/glue/password_model_associator.h"
+#include "chrome/browser/sync/profile_sync_factory.h"
 #include "chrome/browser/sync/profile_sync_service.h"
-#include "chrome/browser/sync/profile_sync_factory.h"
+#include "chrome/browser/webdata/web_data_service.h"
 #include "content/browser/browser_thread.h"
 
 namespace browser_sync {
 
 PasswordDataTypeController::PasswordDataTypeController(
     ProfileSyncFactory* profile_sync_factory,
     Profile* profile,
     ProfileSyncService* sync_service)
-    : profile_sync_factory_(profile_sync_factory),
-      profile_(profile),
-      sync_service_(sync_service),
-      state_(NOT_RUNNING),
-      abort_association_(false),
-      abort_association_complete_(false, false),
-      datatype_stopped_(false, false) {
-  DCHECK(profile_sync_factory);
-  DCHECK(profile);
-  DCHECK(sync_service);
+    : NonFrontendDataTypeController(profile_sync_factory,
+                                 profile,
+                                 sync_service) {
 }
 
 PasswordDataTypeController::~PasswordDataTypeController() {
 }
 
-void PasswordDataTypeController::Start(StartCallback* start_callback) {
+bool PasswordDataTypeController::StartModels() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  DCHECK(start_callback);
-  if (state_ != NOT_RUNNING) {
-    start_callback->Run(BUSY, FROM_HERE);
-    delete start_callback;
-    return;
-  }
-
+  DCHECK_EQ(state_, MODEL_STARTING);
   password_store_ = profile_->GetPasswordStore(Profile::EXPLICIT_ACCESS);
   if (!password_store_.get()) {
     LOG(ERROR) << "PasswordStore not initialized, password datatype controller"
                << " aborting.";
-    state_ = NOT_RUNNING;
-    start_callback->Run(ABORTED, FROM_HERE);
-    delete start_callback;
-    return;
+    StartDoneImpl(ABORTED, NOT_RUNNING, FROM_HERE);
+    return false;
   }
-
-  start_callback_.reset(start_callback);
-  abort_association_ = false;
-  set_state(ASSOCIATING);
-  password_store_->ScheduleTask(
-      NewRunnableMethod(this, &PasswordDataTypeController::StartImpl));
-}
-
-// TODO(sync): Blocking the UI thread at shutdown is bad. If we had a way of
-// distinguishing chrome shutdown from sync shutdown, we should be able to avoid
-// this (http://crbug.com/55662). Further, all this functionality should be
-// abstracted to a higher layer, where we could ensure all datatypes are doing
-// the same thing (http://crbug.com/76232).
-void PasswordDataTypeController::Stop() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  // If Stop() is called while Start() is waiting for association to
-  // complete, we need to abort the association and wait for the PASSWORD
-  // thread to finish the StartImpl() task.
-  if (state_ == ASSOCIATING) {
-    {
-      base::AutoLock lock(abort_association_lock_);
-      abort_association_ = true;
-      if (model_associator_.get())
-        model_associator_->AbortAssociation();
-    }
-    // Wait for the model association to abort.
-    abort_association_complete_.Wait();
-    StartDoneImpl(ABORTED, STOPPING);
-  }
-
-  // If Stop() is called while Start() is waiting for another service to load,
-  // abort the start.
-  if (state_ == MODEL_STARTING)
-    StartDoneImpl(ABORTED, STOPPING);
-
-  DCHECK(!start_callback_.get());
-
-  if (change_processor_ != NULL)
-    sync_service_->DeactivateDataType(this, change_processor_.get());
-
-  set_state(NOT_RUNNING);
-  DCHECK(password_store_.get());
-  password_store_->ScheduleTask(
-      NewRunnableMethod(this, &PasswordDataTypeController::StopImpl));
-  datatype_stopped_.Wait();
-}
-
-bool PasswordDataTypeController::enabled() {
   return true;
 }
 
+bool PasswordDataTypeController::KickOffAssociation() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_EQ(state_, ASSOCIATING);
+  DCHECK(password_store_.get());
+  password_store_->ScheduleTask(
+      NewRunnableMethod(this, &PasswordDataTypeController::Associate));
+  return true;
+}
+
+void PasswordDataTypeController::CreateSyncComponents() {
+  DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_EQ(state_, ASSOCIATING);
+  ProfileSyncFactory::SyncComponents sync_components =
+      profile_sync_factory_->CreatePasswordSyncComponents(
+          sync_service_,
+          password_store_.get(),
+          this);
+  model_associator_.reset(sync_components.model_associator);
+  change_processor_.reset(sync_components.change_processor);
+}
+
+bool PasswordDataTypeController::KickOffDestroy() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_EQ(state_, STOPPING);
+  DCHECK(password_store_.get());
+  password_store_->ScheduleTask(
+      NewRunnableMethod(this, &PasswordDataTypeController::Destroy));
+  return true;
+}
+
 syncable::ModelType PasswordDataTypeController::type() const {
   return syncable::PASSWORDS;
 }
 
 browser_sync::ModelSafeGroup PasswordDataTypeController::model_safe_group()
     const {
   return browser_sync::GROUP_PASSWORD;
 }
 
-std::string PasswordDataTypeController::name() const {
-  // For logging only.
-  return "password";
+void PasswordDataTypeController::RecordUnrecoverableError(
+    const tracked_objects::Location& from_here,
+    const std::string& message) {
+  DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::UI));
+  UMA_HISTOGRAM_COUNTS("Sync.PasswordRunFailures", 1);
 }
 
-DataTypeController::State PasswordDataTypeController::state() const {
-  return state_;
+void PasswordDataTypeController::RecordAssociationTime(base::TimeDelta time) {
+  DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::UI));
+  UMA_HISTOGRAM_TIMES("Sync.PasswordAssociationTime", time);
 }
 
-void PasswordDataTypeController::StartImpl() {
-  // No additional services need to be started before we can proceed
-  // with model association.
-  {
-    base::AutoLock lock(abort_association_lock_);
-    if (abort_association_) {
-      abort_association_complete_.Signal();
-      return;
-    }
-    ProfileSyncFactory::SyncComponents sync_components =
-        profile_sync_factory_->CreatePasswordSyncComponents(
-            sync_service_,
-            password_store_.get(),
-            this);
-    model_associator_.reset(sync_components.model_associator);
-    change_processor_.reset(sync_components.change_processor);
-  }
-
-  if (!model_associator_->CryptoReadyIfNecessary()) {
-    StartFailed(NEEDS_CRYPTO);
-    return;
-  }
-
-  bool sync_has_nodes = false;
-  if (!model_associator_->SyncModelHasUserCreatedNodes(&sync_has_nodes)) {
-    StartFailed(UNRECOVERABLE_ERROR);
-    return;
-  }
-
-  base::TimeTicks start_time = base::TimeTicks::Now();
-  bool merge_success = model_associator_->AssociateModels();
-  UMA_HISTOGRAM_TIMES("Sync.PasswordAssociationTime",
-                      base::TimeTicks::Now() - start_time);
-  if (!merge_success) {
-    StartFailed(ASSOCIATION_FAILED);
-    return;
-  }
-
-  sync_service_->ActivateDataType(this, change_processor_.get());
-  StartDone(!sync_has_nodes ? OK_FIRST_RUN : OK, RUNNING);
-}
-
-void PasswordDataTypeController::StartDone(
-    DataTypeController::StartResult result,
-    DataTypeController::State new_state) {
-  abort_association_complete_.Signal();
-  base::AutoLock lock(abort_association_lock_);
-  if (!abort_association_) {
-    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-                            NewRunnableMethod(
-                                this,
-                                &PasswordDataTypeController::StartDoneImpl,
-                                result,
-                                new_state));
-  }
-}
-
-void PasswordDataTypeController::StartDoneImpl(
-    DataTypeController::StartResult result,
-    DataTypeController::State new_state) {
+void PasswordDataTypeController::RecordStartFailure(StartResult result) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  set_state(new_state);
-  start_callback_->Run(result, FROM_HERE);
-  start_callback_.reset();
-}
-
-void PasswordDataTypeController::StopImpl() {
-  if (model_associator_ != NULL)
-    model_associator_->DisassociateModels();
-
-  change_processor_.reset();
-  model_associator_.reset();
-
-  datatype_stopped_.Signal();
-}
-
-void PasswordDataTypeController::StartFailed(StartResult result) {
-  change_processor_.reset();
-  model_associator_.reset();
-  StartDone(result, NOT_RUNNING);
-}
-
-void PasswordDataTypeController::OnUnrecoverableError(
-    const tracked_objects::Location& from_here, const std::string& message) {
-  BrowserThread::PostTask(
-      BrowserThread::UI, FROM_HERE,
-      NewRunnableMethod(this,
-                        &PasswordDataTypeController::OnUnrecoverableErrorImpl,
-                        from_here, message));
-}
-
-void PasswordDataTypeController::OnUnrecoverableErrorImpl(
-    const tracked_objects::Location& from_here,
-    const std::string& message) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  sync_service_->OnUnrecoverableError(from_here, message);
+  UMA_HISTOGRAM_ENUMERATION("Sync.PasswordStartFailures",
+                            result,
+                            MAX_START_RESULT);
 }
 
 }  // namespace browser_sync