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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "blimp/helium/object_sync_state.h" | |
| 6 | |
| 7 #include <string> | |
| 8 | |
| 9 #include "base/bind.h" | |
| 10 #include "base/memory/ptr_util.h" | |
| 11 #include "blimp/helium/syncable.h" | |
| 12 #include "blimp/helium/update_scheduler.h" | |
| 13 | |
| 14 namespace blimp { | |
| 15 namespace helium { | |
| 16 | |
| 17 ObjectSyncState::ObjectSyncState( | |
| 18 HeliumObjectId object_id, | |
| 19 std::unique_ptr<LazySyncable<std::string>> object) | |
| 20 : object_id_(object_id), object_(std::move(object)) { | |
| 21 object_->SetLocalUpdateCallback( | |
| 22 base::Bind(&ObjectSyncState::OnLocalUpdate, base::Unretained(this))); | |
| 23 } | |
| 24 | |
| 25 ObjectSyncState::~ObjectSyncState() = default; | |
| 26 | |
| 27 void ObjectSyncState::OnLocalUpdate() { | |
| 28 is_dirty_ = true; | |
| 29 if (scheduler_) { | |
| 30 scheduler_->OnLocalUpdate(object_id_); | |
| 31 } | |
| 32 } | |
| 33 | |
| 34 void ObjectSyncState::PrepareChangesetMessage( | |
| 35 MessagePreparedCallback callback) { | |
| 36 DCHECK(callback); | |
| 37 DCHECK(scheduler_); | |
| 38 | |
| 39 // Set as not dirty now so that if there are local changes between now and | |
| 40 // when we send the Changeset, it is reflected in |is_dirty_|. | |
| 41 is_dirty_ = false; | |
| 42 prepare_callback_ = std::move(callback); | |
| 43 object_->PrepareToCreateChangeset( | |
| 44 sent_revision_, prepared_for_changeset_callback_.callback()); | |
| 45 } | |
| 46 | |
| 47 void ObjectSyncState::PrepareAckMessage(MessagePreparedCallback callback) { | |
| 48 DCHECK(callback); | |
| 49 | |
| 50 prepare_callback_ = std::move(callback); | |
| 51 OnPreparedChangeset(); | |
| 52 } | |
| 53 | |
| 54 void ObjectSyncState::OnStreamConnected(UpdateScheduler* scheduler) { | |
| 55 DCHECK(scheduler); | |
| 56 | |
| 57 scheduler_ = scheduler; | |
| 58 prepared_for_changeset_callback_.Reset(base::Bind( | |
| 59 &ObjectSyncState::OnPreparedChangeset, base::Unretained(this))); | |
| 60 | |
| 61 // Determine if our last sent HeliumMessage was acknowledged by the peer. | |
| 62 is_confirmed_ = (sent_revision_ == acked_revision_); | |
| 63 | |
| 64 // Mark the object as requiring an outgoing acknowledgement and inform | |
| 65 // |scheduler_|. | |
| 66 remote_revision_needs_ack_ = true; | |
| 67 scheduler_->OnNeedsAck(object_id_); | |
| 68 | |
| 69 // Schedule an update if the object is confirmed and dirty. | |
| 70 if (is_confirmed_ && is_dirty_) { | |
| 71 scheduler_->OnLocalUpdate(object_id_); | |
| 72 } | |
| 73 } | |
| 74 | |
| 75 void ObjectSyncState::OnStreamDisconnected() { | |
| 76 DCHECK(scheduler_); | |
| 77 | |
| 78 prepared_for_changeset_callback_.Cancel(); | |
| 79 prepare_callback_.Reset(); | |
| 80 scheduler_ = nullptr; | |
| 81 } | |
| 82 | |
| 83 void ObjectSyncState::OnChangesetReceived(Revision end_revision, | |
| 84 const std::string& changeset) { | |
| 85 DCHECK(scheduler_); | |
| 86 | |
| 87 if (object_->ValidateChangeset(changeset)) { | |
| 88 object_->ApplyChangeset(changeset); | |
| 89 remote_revision_ = end_revision; | |
| 90 remote_revision_needs_ack_ = true; | |
| 91 scheduler_->OnNeedsAck(object_id_); | |
| 92 } | |
| 93 } | |
| 94 | |
| 95 void ObjectSyncState::OnAckReceived(Revision ack_revision) { | |
| 96 DCHECK(scheduler_); | |
| 97 | |
| 98 acked_revision_ = ack_revision; | |
| 99 object_->ReleaseBefore(acked_revision_); | |
| 100 if (!is_confirmed_) { | |
| 101 is_confirmed_ = true; | |
| 102 sent_revision_ = ack_revision; | |
| 103 if (is_dirty_) { | |
| 104 scheduler_->OnLocalUpdate(object_id_); | |
| 105 } | |
| 106 } | |
| 107 } | |
| 108 | |
| 109 void ObjectSyncState::OnPreparedChangeset() { | |
| 110 DCHECK(prepare_callback_); | |
| 111 | |
| 112 proto::HeliumMessage message; | |
| 113 message.set_object_id(object_id_); | |
| 114 | |
| 115 bool has_changed = object_->GetRevision() > sent_revision_; | |
| 116 if (is_confirmed_ && has_changed) { | |
| 117 message.set_start_revision(sent_revision_); | |
| 118 message.set_end_revision(object_->GetRevision()); | |
| 119 | |
| 120 std::unique_ptr<std::string> changeset = | |
| 121 object_->CreateChangeset(sent_revision_); | |
| 122 message.set_changeset(*changeset); | |
| 123 | |
| 124 sent_revision_ = message.end_revision(); | |
| 125 } | |
| 126 | |
| 127 if (remote_revision_needs_ack_) { | |
| 128 message.set_ack_revision(remote_revision_); | |
| 129 remote_revision_needs_ack_ = false; | |
| 130 } | |
| 131 | |
| 132 prepare_callback_.Run(std::move(message)); | |
| 133 } | |
| 134 | |
| 135 } // namespace helium | |
| 136 } // namespace blimp | |
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Chromium Code Reviews
Issue 2602103002:
Delete blimp/helium and remove references to it from dependent targets (Closed)
