Decouple Cache Storage messaging from Service Worker/Embedded Worker

content/browser/service_worker/cache_storage_context_impl.cc

+// 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.
+
+#include "content/browser/service_worker/cache_storage_context_impl.h"
+
+#include "base/bind.h"
+#include "base/files/file_path.h"
+#include "base/threading/sequenced_worker_pool.h"
+#include "content/browser/fileapi/chrome_blob_storage_context.h"
+#include "content/browser/service_worker/service_worker_cache_storage_manager.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/browser_thread.h"
+#include "net/url_request/url_request_context_getter.h"
+#include "storage/browser/blob/blob_storage_context.h"
+#include "storage/browser/quota/quota_manager_proxy.h"
+#include "storage/browser/quota/special_storage_policy.h"
+
+namespace content {
+
+CacheStorageContextImpl::CacheStorageContextImpl(
+    BrowserContext* browser_context) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+}
+
+CacheStorageContextImpl::~CacheStorageContextImpl() {
+}
+
+void CacheStorageContextImpl::Init(
+    const base::FilePath& user_data_directory,
+    storage::QuotaManagerProxy* quota_manager_proxy,
+    storage::SpecialStoragePolicy* special_storage_policy) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  is_incognito_ = user_data_directory.empty();
+  base::SequencedWorkerPool* pool = BrowserThread::GetBlockingPool();
+  scoped_refptr<base::SequencedTaskRunner> cache_task_runner =
+      pool->GetSequencedTaskRunnerWithShutdownBehavior(
+          BrowserThread::GetBlockingPool()->GetSequenceToken(),
+          base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
+
+  // This thread-hopping antipattern is needed here for some unit tests, where
+  // browser threads are collapsed the quota manager is initialized before the
+  // posted task can register the quota client.
+  // TODO: Fix the tests to let the quota manager initialize normally.
+  if (BrowserThread::CurrentlyOn(BrowserThread::IO)) {
+    CreateCacheStorageManager(user_data_directory, cache_task_runner,
+                              quota_manager_proxy, special_storage_policy);
+    return;
+  }
+
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&CacheStorageContextImpl::CreateCacheStorageManager, this,
+                 user_data_directory, cache_task_runner,
+                 make_scoped_refptr(quota_manager_proxy),
+                 make_scoped_refptr(special_storage_policy)));
+}
+
+void CacheStorageContextImpl::Shutdown() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&CacheStorageContextImpl::ShutdownOnIO, this));
+}
+
+ServiceWorkerCacheStorageManager* CacheStorageContextImpl::cache_manager()
+    const {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  return cache_manager_.get();
+}
+
+void CacheStorageContextImpl::SetBlobParametersForCache(
+    net::URLRequestContextGetter* request_context,
+    ChromeBlobStorageContext* blob_storage_context) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  if (cache_manager_ && request_context && blob_storage_context) {
+    cache_manager_->SetBlobParametersForCache(
+        request_context->GetURLRequestContext(),
+        blob_storage_context->context()->AsWeakPtr());
+  }
+}
+
+void CacheStorageContextImpl::CreateCacheStorageManager(
+    const base::FilePath& user_data_directory,
+    const scoped_refptr<base::SequencedTaskRunner>& cache_task_runner,
+    storage::QuotaManagerProxy* quota_manager_proxy,
+    storage::SpecialStoragePolicy* special_storage_policy) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  DCHECK(!cache_manager_);
+  cache_manager_ = ServiceWorkerCacheStorageManager::Create(
+      user_data_directory, cache_task_runner.get(),
+      make_scoped_refptr(quota_manager_proxy));
+}
+
+void CacheStorageContextImpl::ShutdownOnIO() {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  cache_manager_.reset();
+}
+
+}  // namespace content