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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/web_cache/browser/web_cache_manager.h"
#include "base/no_destructor.h"
namespace web_cache {
// static
WebCacheManager* WebCacheManager::GetInstance() {
static base::NoDestructor<WebCacheManager> s_instance;
return s_instance.get();
}
WebCacheManager::WebCacheManager() {
// The instance can be created once renderers are already running, thus we
// cannot observe the creation of the previous processes.
for (auto iter(content::RenderProcessHost::AllHostsIterator());
!iter.IsAtEnd(); iter.Advance()) {
Add(iter.GetCurrentValue()->GetDeprecatedID());
}
}
WebCacheManager::~WebCacheManager() = default;
void WebCacheManager::Add(int renderer_id) {
renderers_.insert(renderer_id);
content::RenderProcessHost* host =
content::RenderProcessHost::FromID(renderer_id);
if (host) {
mojo::Remote<mojom::WebCache> service;
host->BindReceiver(service.BindNewPipeAndPassReceiver());
web_cache_services_[renderer_id] = std::move(service);
}
}
void WebCacheManager::Remove(int renderer_id) {
renderers_.erase(renderer_id);
web_cache_services_.erase(renderer_id);
}
void WebCacheManager::ClearCache() {
// Tell each renderer process to clear the cache.
ClearRendererCache(renderers_, INSTANTLY);
}
void WebCacheManager::ClearCacheOnNavigation() {
// Tell each renderer process to clear the cache when a tab is reloaded or
// the user navigates to a new website.
ClearRendererCache(renderers_, ON_NAVIGATION);
}
void WebCacheManager::OnRenderProcessHostCreated(
content::RenderProcessHost* process_host) {
Add(process_host->GetDeprecatedID());
rph_observations_.AddObservation(process_host);
}
void WebCacheManager::RenderProcessExited(
content::RenderProcessHost* process_host,
const content::ChildProcessTerminationInfo& info) {
RenderProcessHostDestroyed(process_host);
}
void WebCacheManager::RenderProcessHostDestroyed(
content::RenderProcessHost* process_host) {
rph_observations_.RemoveObservation(process_host);
Remove(process_host->GetDeprecatedID());
}
void WebCacheManager::ClearCacheForProcess(int render_process_id) {
std::set<int> renderers;
renderers.insert(render_process_id);
ClearRendererCache(renderers, INSTANTLY);
}
void WebCacheManager::ClearRendererCache(
const std::set<int>& renderers,
WebCacheManager::ClearCacheOccasion occasion) {
for (int renderer_id : renderers) {
content::RenderProcessHost* host =
content::RenderProcessHost::FromID(renderer_id);
if (host) {
// Find the mojo::Remote<WebCache> by renderer process id.
auto it = web_cache_services_.find(renderer_id);
if (it != web_cache_services_.end()) {
mojo::Remote<mojom::WebCache>& service = it->second;
DCHECK(service);
service->ClearCache(occasion == ON_NAVIGATION);
}
}
}
}
} // namespace web_cache
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