Index: net/base/backoff_entry_serializer.cc |
diff --git a/net/base/backoff_entry_serializer.cc b/net/base/backoff_entry_serializer.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..3d04e10b0afd23fcb5db4fef0bf28c5222a62306 |
--- /dev/null |
+++ b/net/base/backoff_entry_serializer.cc |
@@ -0,0 +1,70 @@ |
+// Copyright (c) 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 "net/base/backoff_entry_serializer.h" |
+ |
+#include "base/time/tick_clock.h" |
+#include "base/values.h" |
+#include "net/base/backoff_entry.h" |
+ |
+namespace { |
+const int SERIALIZATION_VERSION_NUMBER = 1; |
+} // namespace |
+ |
+namespace net { |
+ |
+scoped_ptr<base::ListValue> BackoffEntrySerializer::SerializeToValue( |
+ const BackoffEntry& entry, base::Time time_now) { |
+ scoped_ptr<base::ListValue> serialized(new base::ListValue()); |
+ serialized->AppendInteger(SERIALIZATION_VERSION_NUMBER); |
+ serialized->AppendInteger(entry.failure_count()); |
+ // Can't use entry.GetTimeUntilRelease as it doesn't allow negative deltas. |
+ base::TimeDelta time_until_release = |
+ entry.GetReleaseTime() - entry.clock_->NowTicks(); |
+ // We redundantly store both the remaining time delta and the absolute time. |
mmenke
2015/05/05 15:47:52
Avoid using "we" in comments.
johnme
2015/05/06 12:46:47
Done.
|
+ // This will let us work around some cases where wall clock time changes. |
mmenke
2015/05/05 15:47:51
Avoid using "us" in comments.
johnme
2015/05/06 12:46:47
Done.
|
+ serialized->AppendDouble(time_until_release.InSecondsF()); |
+ base::Time absolute_release_time = time_until_release + time_now; |
+ serialized->AppendDouble(absolute_release_time.ToDoubleT()); |
mmenke
2015/05/05 15:47:52
Do we really need these both? Seems like we could
johnme
2015/05/06 12:46:47
I added serialization of the time_until_release (n
mmenke
2015/05/06 17:34:47
Ah, right. Forgot about SetCustomReleaseTime.
|
+ return serialized; |
+} |
+ |
+scoped_ptr<BackoffEntry> BackoffEntrySerializer::DeserializeFromValue( |
+ const base::ListValue& serialized, const BackoffEntry::Policy* policy, |
+ base::TickClock* tick_clock, base::Time time_now) { |
+ if (serialized.GetSize() != 4) |
+ return nullptr; |
+ int version_number; |
+ if (!serialized.GetInteger(0, &version_number) || |
+ version_number != SERIALIZATION_VERSION_NUMBER) |
+ return nullptr; |
mmenke
2015/05/05 15:47:51
Use braces when the condition of an if takes up mo
johnme
2015/05/06 12:46:46
Done.
|
+ int failure_count; |
+ if (!serialized.GetInteger(1, &failure_count)) |
mmenke
2015/05/05 15:47:51
We should fail if this is negative.
johnme
2015/05/06 12:46:47
Done.
|
+ return nullptr; |
+ double original_time_until_release_double; |
+ if (!serialized.GetDouble(2, &original_time_until_release_double)) |
+ return nullptr; |
+ double absolute_release_time_double; |
+ if (!serialized.GetDouble(3, &absolute_release_time_double)) |
mmenke
2015/05/05 15:47:51
We should fail if this is negative.
johnme
2015/05/06 12:46:47
Done.
|
+ return nullptr; |
+ scoped_ptr<BackoffEntry> entry(new BackoffEntry(policy, tick_clock)); |
+ entry->failure_count_ = failure_count; |
mmenke
2015/05/05 15:47:52
Erm...Could we just call InformOfRequest(false) fa
johnme
2015/05/06 12:46:47
Hmm, ok done, but note that I had to make TimeUnti
|
+ base::TimeDelta original_time_until_release = |
+ base::TimeDelta::FromSecondsD(original_time_until_release_double); |
+ base::Time absolute_release_time = |
+ base::Time::FromDoubleT(absolute_release_time_double); |
+ base::TimeDelta time_until_release = |
+ absolute_release_time - time_now; |
+ // In cases where the system wall clock is rewound, use the redundant |
+ // original_time_until_release to ensure the backoff duration isn't longer |
+ // than it was before serializing (note that it's not possible to protect |
+ // against the clock being wound forward). |
+ if (time_until_release > original_time_until_release) |
+ time_until_release = original_time_until_release; |
+ entry->SetCustomReleaseTime( |
+ entry->TimeUntilReleaseToReleaseTime(time_until_release)); |
+ return entry; |
mmenke
2015/05/05 15:47:52
Think this method could use a couple blank lines,
johnme
2015/05/06 12:46:47
Done.
|
+} |
+ |
+} // namespace net |