InstantExtended: Adding InstantRestrictedIDCache.

chrome/browser/search/instant_io_context.cc

 // Copyright 2013 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/search/instant_io_context.h"
 
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/resource_context.h"
 #include "content/public/browser/resource_request_info.h"
 #include "googleurl/src/gurl.h"
 #include "net/url_request/url_request.h"
 
 using content::BrowserThread;
 
 namespace {
 
+// Size of the most visited item cache.
+const int kMostVisitedItemCacheSize = 100;

[sreeram, 2013/03/19 21:36:17]

Not being used. Can be removed.

[Shishir, 2013/03/19 22:20:20]

Done.

+
 // Retrieves the Instant data from the |context|'s named user-data.
 InstantIOContext* GetDataForResourceContext(
     content::ResourceContext* context) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   return base::UserDataAdapter<InstantIOContext>::Get(
       context, InstantIOContext::kInstantIOContextKeyName);
 }
 
 InstantIOContext* GetDataForRequest(const net::URLRequest* request) {
   const content::ResourceRequestInfo* info =
       content::ResourceRequestInfo::ForRequest(request);
   if (!info)
     return NULL;
 
   return GetDataForResourceContext(info->GetContext());
 }
 
 }  // namespace
 
 const char InstantIOContext::kInstantIOContextKeyName[] = "instant_io_context";
 
-InstantIOContext::InstantIOContext() {
+InstantIOContext::InstantIOContext()
+    : most_visited_item_cache_(kMaxInstantMostVisitedItemCacheSize) {
   // The InstantIOContext is created on the UI thread but is accessed
   // on the IO thread.
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 }
 
 InstantIOContext::~InstantIOContext() {
 }
 
 // static
 void InstantIOContext::SetUserDataOnIO(
@@ skipping 19 matching lines @@
 }
 
 // static
 void InstantIOContext::ClearInstantProcessesOnIO(
     scoped_refptr<InstantIOContext> instant_io_context) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   instant_io_context->process_ids_.clear();
 }
 
 // static
-void InstantIOContext::AddMostVisitedItemIDOnIO(
+void InstantIOContext::AddMostVisitedItemsOnIO(
     scoped_refptr<InstantIOContext> instant_io_context,
-    uint64 most_visited_item_id, const GURL& url) {
+    std::vector<InstantMostVisitedItemIDPair> items) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-  instant_io_context->most_visited_item_id_to_url_map_[most_visited_item_id] =
-      url;
+  instant_io_context->most_visited_item_cache_.AddItemsWithRestrictedID(items);
 }
 
-// static
-void InstantIOContext::DeleteMostVisitedURLsOnIO(
-    scoped_refptr<InstantIOContext> instant_io_context,
-    std::vector<uint64> deleted_ids, bool all_history) {
-  if (all_history) {
-    instant_io_context->most_visited_item_id_to_url_map_.clear();
-    return;
-  }
-
-  for (size_t i = 0; i < deleted_ids.size(); ++i) {
-    instant_io_context->most_visited_item_id_to_url_map_.erase(
-        instant_io_context->most_visited_item_id_to_url_map_.find(
-            deleted_ids[i]));
-  }
-}
 
 // static
 bool InstantIOContext::ShouldServiceRequest(const net::URLRequest* request) {
   const content::ResourceRequestInfo* info =
       content::ResourceRequestInfo::ForRequest(request);
   if (!info)
     return false;
 
   InstantIOContext* instant_io_context = GetDataForRequest(request);
   if (!instant_io_context)
     return false;
 
   int process_id = -1;
   int render_view_id = -1;
   if (info->GetAssociatedRenderView(&process_id, &render_view_id) &&
       instant_io_context->IsInstantProcess(process_id))
     return true;
   return false;
 }
 
 // static
-bool InstantIOContext::GetURLForMostVisitedItemId(
+bool InstantIOContext::GetURLForMostVisitedItemID(
     const net::URLRequest* request,
-    uint64 most_visited_item_id,
+    InstantRestrictedID most_visited_item_id,
     GURL* url) {
   InstantIOContext* instant_io_context = GetDataForRequest(request);
   if (!instant_io_context) {
     *url = GURL();
     return false;
   }
 
-  return instant_io_context->GetURLForMostVisitedItemId(most_visited_item_id,
+  return instant_io_context->GetURLForMostVisitedItemID(most_visited_item_id,
                                                         url);
 }
 
 bool InstantIOContext::IsInstantProcess(int process_id) const {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   return process_ids_.count(process_id) != 0;
 }
 
-bool InstantIOContext::GetURLForMostVisitedItemId(uint64 most_visited_item_id,
-                                                  GURL* url) {
-  std::map<uint64, GURL>::iterator it =
-      most_visited_item_id_to_url_map_.find(most_visited_item_id);
-  if (it != most_visited_item_id_to_url_map_.end()) {
-    *url = it->second;
+bool InstantIOContext::GetURLForMostVisitedItemID(
+    InstantRestrictedID most_visited_item_id,
+    GURL* url) const {
+  InstantMostVisitedItem item;
+  if (most_visited_item_cache_.GetItemWithRestrictedID(most_visited_item_id,
+                                                       &item)) {
+    *url = item.url;
     return true;
   }
+
   *url = GURL();
   return false;
 }