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// Copyright (c) 2010 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 "webkit/appcache/appcache_disk_cache.h"
#include "base/file_path.h"
#include "base/logging.h"
#include "base/string_number_conversions.h"
#include "net/base/net_errors.h"
namespace appcache {
AppCacheDiskCache::AppCacheDiskCache()
: is_disabled_(false), init_callback_(NULL) {
}
AppCacheDiskCache::~AppCacheDiskCache() {
if (create_backend_callback_) {
create_backend_callback_->Cancel();
create_backend_callback_.release();
OnCreateBackendComplete(net::ERR_ABORTED);
}
}
int AppCacheDiskCache::InitWithDiskBackend(
const FilePath& disk_cache_directory, int disk_cache_size, bool force,
base::MessageLoopProxy* cache_thread, net::CompletionCallback* callback) {
return Init(net::APP_CACHE, disk_cache_directory,
disk_cache_size, force, cache_thread, callback);
}
int AppCacheDiskCache::InitWithMemBackend(
int mem_cache_size, net::CompletionCallback* callback) {
return Init(net::MEMORY_CACHE, FilePath(), mem_cache_size, false, NULL,
callback);
}
void AppCacheDiskCache::Disable() {
if (is_disabled_)
return;
is_disabled_ = true;
if (create_backend_callback_) {
create_backend_callback_->Cancel();
create_backend_callback_.release();
OnCreateBackendComplete(net::ERR_ABORTED);
}
}
int AppCacheDiskCache::CreateEntry(int64 key, disk_cache::Entry** entry,
net::CompletionCallback* callback) {
if (is_disabled_)
return net::ERR_ABORTED;
if (is_initializing()) {
pending_calls_.push_back(PendingCall(CREATE, key, entry, callback));
return net::ERR_IO_PENDING;
}
if (!disk_cache_.get())
return net::ERR_FAILED;
return disk_cache_->CreateEntry(base::Int64ToString(key), entry, callback);
}
int AppCacheDiskCache::OpenEntry(int64 key, disk_cache::Entry** entry,
net::CompletionCallback* callback) {
if (is_disabled_)
return net::ERR_ABORTED;
if (is_initializing()) {
pending_calls_.push_back(PendingCall(OPEN, key, entry, callback));
return net::ERR_IO_PENDING;
}
if (!disk_cache_.get())
return net::ERR_FAILED;
return disk_cache_->OpenEntry(base::Int64ToString(key), entry, callback);
}
int AppCacheDiskCache::DoomEntry(int64 key,
net::CompletionCallback* callback) {
if (is_disabled_)
return net::ERR_ABORTED;
if (is_initializing()) {
pending_calls_.push_back(PendingCall(DOOM, key, NULL, callback));
return net::ERR_IO_PENDING;
}
if (!disk_cache_.get())
return net::ERR_FAILED;
return disk_cache_->DoomEntry(base::Int64ToString(key), callback);
}
int AppCacheDiskCache::Init(net::CacheType cache_type,
const FilePath& cache_directory,
int cache_size, bool force,
base::MessageLoopProxy* cache_thread,
net::CompletionCallback* callback) {
DCHECK(!is_initializing() && !disk_cache_.get());
is_disabled_ = false;
create_backend_callback_ = new CreateBackendCallback(
this, &AppCacheDiskCache::OnCreateBackendComplete);
int rv = disk_cache::CreateCacheBackend(
cache_type, cache_directory, cache_size, force, cache_thread,
&(create_backend_callback_->backend_ptr_), create_backend_callback_);
if (rv == net::ERR_IO_PENDING)
init_callback_ = callback;
else
OnCreateBackendComplete(rv);
return rv;
}
void AppCacheDiskCache::OnCreateBackendComplete(int rv) {
if (rv == net::OK) {
disk_cache_.reset(create_backend_callback_->backend_ptr_);
create_backend_callback_->backend_ptr_ = NULL;
}
create_backend_callback_ = NULL;
// Invoke our clients callback function.
if (init_callback_) {
init_callback_->Run(rv);
init_callback_ = NULL;
}
// Service pending calls that were queued up while we were initailizating.
for (PendingCalls::const_iterator iter = pending_calls_.begin();
iter < pending_calls_.end(); ++iter) {
int rv = net::ERR_FAILED;
switch (iter->call_type) {
case CREATE:
rv = CreateEntry(iter->key, iter->entry, iter->callback);
break;
case OPEN:
rv = OpenEntry(iter->key, iter->entry, iter->callback);
break;
case DOOM:
rv = DoomEntry(iter->key, iter->callback);
break;
default:
NOTREACHED();
break;
}
if (rv != net::ERR_IO_PENDING)
iter->callback->Run(rv);
}
pending_calls_.clear();
}
} // namespace appcache
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