Implement QuotaTemporaryStorageEvictor.

webkit/quota/quota_temporary_storage_evictor.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 "webkit/quota/quota_temporary_storage_evictor.h"
+
+#include <list>
+#include <vector>
+
+#include "base/message_loop.h"
+#include "base/task.h"
+#include "googleurl/src/gurl.h"
+#include "webkit/quota/quota_client.h"
+
+namespace quota {
+
+const double QuotaTemporaryStorageEvictor::kUsageRatioToBeEvicted = 0.7;
+
+QuotaTemporaryStorageEvictor::QuotaTemporaryStorageEvictor(
+    int64 target_available_space,
+    int64 delay_ms,
+    scoped_refptr<base::MessageLoopProxy> io_message_loop)
+    : physical_available_space_to_be_evicted(1000 * 1000 * 500),
+      quota_manager_(NULL),
+      target_available_space_(target_available_space),
+      delay_ms_(delay_ms),
+      repeated_eviction_(false),
+      io_message_loop_(io_message_loop),
+      callback_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
+}
+
+QuotaTemporaryStorageEvictor::~QuotaTemporaryStorageEvictor() {
+  LOG(ERROR) << "destruct";
+}
+
+void QuotaTemporaryStorageEvictor::RegisterQuotaManagerOnIOThread(

[kinuko, 2011/05/19 03:04:13]

As we talked locally before I'd like to avoid this 'registration' stuff
(regardless of whether we use a separate class or not)

[Dai Mikurube (NOT FULLTIME), 2011/05/19 03:33:36]

Yes, I'll get rid of it.

+    QuotaEvictionHandler* quota_manager) {
+  LOG(ERROR) << "RegisterQuotaManagerOnIOThread";
+  DCHECK(io_message_loop_->BelongsToCurrentThread());
+  quota_manager_ = quota_manager;
+}
+
+void QuotaTemporaryStorageEvictor::OnQuotaManagerDestroyedOnIOThread() {
+  LOG(ERROR) << "OnQuotaManagerDestroyedOnIOThread";
+  DCHECK(io_message_loop_->BelongsToCurrentThread());
+  LOG(ERROR) << "OnQuotaManagerDestroyedOnIOThread 2";
+  quota_manager_ = NULL;
+}
+
+void QuotaTemporaryStorageEvictor::OnGottenUsageAndQuotaOnIOThread(
+    QuotaStatusCode status,
+    int64 usage,
+    int64 quota,
+    int64 physical_available_space) {
+  LOG(ERROR) << "OnGottenUsageAndQuotaOnIOThread";
+  DCHECK(io_message_loop_->BelongsToCurrentThread());
+
+  if (status == kQuotaStatusOk &&
+      (usage > quota * kUsageRatioToBeEvicted ||
+       physical_available_space_to_be_evicted > physical_available_space)) {
+    // Evict another origin immediately.
+    io_message_loop_->PostTask(FROM_HERE, NewRunnableMethod(
+        this, &QuotaTemporaryStorageEvictor::Evict, true));

[kinuko, 2011/05/19 03:04:13]

Any reason we don't directory call Evict here?  (Just asking, you wanted to
avoid to run a long-running task?)

[Dai Mikurube (NOT FULLTIME), 2011/05/19 03:33:36]

It's just a remnant from the days when the Evictor was working on the db_thread
at large.  It'll be changed, but considering to avoid a long-running task might
be an option.

The same for other points.

+  } else if (repeated_eviction_) {
+    // Post the next delayed task.
+    io_message_loop_->PostDelayedTask(FROM_HERE, NewRunnableMethod(
+        this, &QuotaTemporaryStorageEvictor::Evict, false), delay_ms_);
+  }
+}
+
+void QuotaTemporaryStorageEvictor::CallGetUsageAndQuotaOnIOThread() {
+  LOG(ERROR) << "CallGetUsageAndQuotaOnIOThread";
+  DCHECK(io_message_loop_->BelongsToCurrentThread());
+  if (quota_manager_ != NULL) {
+    quota_manager_->GetUsageAndQuotaForEviction(callback_factory_.NewCallback(
+        &QuotaTemporaryStorageEvictor::OnGottenUsageAndQuotaOnIOThread));
+  }
+}
+
+void QuotaTemporaryStorageEvictor::OnEvictionCompletedOnIOThread(
+    QuotaStatusCode status) {
+  LOG(ERROR) << "OnDeletionCompletedOnIOThread";
+  DCHECK(io_message_loop_->BelongsToCurrentThread());
+  io_message_loop_->PostTask(FROM_HERE, NewRunnableMethod(this,
+      &QuotaTemporaryStorageEvictor::CallGetUsageAndQuotaOnIOThread));

[kinuko, 2011/05/19 03:04:13]

We can just chain to call mgr->GetUsageAndQuotaForEviction here?

+}
+
+void QuotaTemporaryStorageEvictor::CallEvictOriginOnIOThread(
+    const GURL& origin) {
+  LOG(ERROR) << "CallEvictOriginOnIOThread";
+  DCHECK(io_message_loop_->BelongsToCurrentThread());
+  if (quota_manager_ != NULL) {
+    quota_manager_->EvictOriginData(
+        origin, kStorageTypeTemporary, callback_factory_.NewCallback(
+            &QuotaTemporaryStorageEvictor::OnEvictionCompletedOnIOThread));
+  }
+}
+
+void QuotaTemporaryStorageEvictor::Evict(bool delete_immediately) {
+  LOG(ERROR) << "Evict: immedeate?=" << delete_immediately;
+  if (delete_immediately) {
+    GURL origin;
+    // origin = manager_->GetLRUOriginExceptFor(/* fs_type?, */ in_use);
+    origin = GURL("http://www.example.com");  // test.
+
+    if (origin.is_empty()) {
+      LOG(ERROR) << "empty";
+      if (repeated_eviction_) {
+        io_message_loop_->PostDelayedTask(FROM_HERE, NewRunnableMethod(
+            this, &QuotaTemporaryStorageEvictor::Evict, false), delay_ms_);
+      }
+      return;
+    }
+
+    io_message_loop_->PostTask(FROM_HERE, NewRunnableMethod(this,
+        &QuotaTemporaryStorageEvictor::CallEvictOriginOnIOThread, origin));
+  } else {
+    io_message_loop_->PostTask(FROM_HERE, NewRunnableMethod(this,
+        &QuotaTemporaryStorageEvictor::CallGetUsageAndQuotaOnIOThread));

[kinuko, 2011/05/19 03:04:13]

ditto

+  }
+}
+
+void QuotaTemporaryStorageEvictor::Start() {
+  LOG(ERROR) << "Start";
+  io_message_loop_->PostTask(FROM_HERE, NewRunnableMethod(
+      this, &QuotaTemporaryStorageEvictor::Evict, false));
+}
+
+void QuotaTemporaryStorageEvictor::DeleteOnCorrectThread() const {
+  LOG(ERROR) << "DeleteOnCorrectThread";
+  if (!io_message_loop_->BelongsToCurrentThread()) {
+    LOG(ERROR) << "io";
+    io_message_loop_->DeleteSoon(FROM_HERE, this);
+    return;
+  }
+  delete this;
+}
+
+}  // namespace quota