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// 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 "chrome/browser/sync/engine/all_status.h"
#include <algorithm>
#include "base/logging.h"
#include "base/port.h"
#include "chrome/browser/sync/engine/net/server_connection_manager.h"
#include "chrome/browser/sync/protocol/service_constants.h"
#include "chrome/browser/sync/sessions/session_state.h"
#include "chrome/browser/sync/syncable/directory_manager.h"
#include "chrome/browser/sync/syncable/model_type.h"
namespace browser_sync {
AllStatus::AllStatus() {
status_.summary = sync_api::SyncManager::Status::OFFLINE;
status_.initial_sync_ended = true;
status_.notifications_enabled = false;
status_.cryptographer_ready = false;
status_.crypto_has_pending_keys = false;
}
AllStatus::~AllStatus() {
}
sync_api::SyncManager::Status AllStatus::CreateBlankStatus() const {
// Status is initialized with the previous status value. Variables
// whose values accumulate (e.g. lifetime counters like updates_received)
// are not to be cleared here.
sync_api::SyncManager::Status status = status_;
status.syncing = true;
status.unsynced_count = 0;
status.conflicting_count = 0;
status.initial_sync_ended = false;
status.syncer_stuck = false;
status.max_consecutive_errors = 0;
status.server_broken = false;
status.updates_available = 0;
return status;
}
sync_api::SyncManager::Status AllStatus::CalcSyncing(
const SyncEngineEvent &event) const {
sync_api::SyncManager::Status status = CreateBlankStatus();
const sessions::SyncSessionSnapshot* snapshot = event.snapshot;
status.unsynced_count += static_cast<int>(snapshot->unsynced_count);
status.conflicting_count += snapshot->errors.num_conflicting_commits;
// The syncer may not be done yet, which could cause conflicting updates.
// But this is only used for status, so it is better to have visibility.
status.conflicting_count += snapshot->num_conflicting_updates;
status.syncing |= snapshot->syncer_status.sync_in_progress;
status.syncing =
snapshot->has_more_to_sync && snapshot->is_silenced;
status.initial_sync_ended |= snapshot->is_share_usable;
status.syncer_stuck |= snapshot->syncer_status.syncer_stuck;
const sessions::ErrorCounters& errors(snapshot->errors);
if (errors.consecutive_errors > status.max_consecutive_errors)
status.max_consecutive_errors = errors.consecutive_errors;
// 100 is an arbitrary limit.
if (errors.consecutive_transient_error_commits > 100)
status.server_broken = true;
status.updates_available += snapshot->num_server_changes_remaining;
status.sync_protocol_error = snapshot->errors.sync_protocol_error;
// Accumulate update count only once per session to avoid double-counting.
// TODO(ncarter): Make this realtime by having the syncer_status
// counter preserve its value across sessions. http://crbug.com/26339
if (event.what_happened == SyncEngineEvent::SYNC_CYCLE_ENDED) {
status.updates_received +=
snapshot->syncer_status.num_updates_downloaded_total;
status.tombstone_updates_received +=
snapshot->syncer_status.num_tombstone_updates_downloaded_total;
status.num_local_overwrites_total +=
snapshot->syncer_status.num_local_overwrites;
status.num_server_overwrites_total +=
snapshot->syncer_status.num_server_overwrites;
if (snapshot->syncer_status.num_updates_downloaded_total == 0) {
++status.empty_get_updates;
} else {
++status.nonempty_get_updates;
}
if (snapshot->syncer_status.num_successful_commits == 0 &&
snapshot->syncer_status.num_updates_downloaded_total == 0) {
++status.useless_sync_cycles;
} else {
++status.useful_sync_cycles;
}
}
return status;
}
void AllStatus::CalcStatusChanges() {
const bool unsynced_changes = status_.unsynced_count > 0;
const bool online = status_.authenticated &&
status_.server_reachable && status_.server_up && !status_.server_broken;
if (online) {
if (status_.syncer_stuck)
status_.summary = sync_api::SyncManager::Status::CONFLICT;
else if (unsynced_changes || status_.syncing)
status_.summary = sync_api::SyncManager::Status::SYNCING;
else
status_.summary = sync_api::SyncManager::Status::READY;
} else if (!status_.initial_sync_ended) {
status_.summary = sync_api::SyncManager::Status::OFFLINE_UNUSABLE;
} else if (unsynced_changes) {
status_.summary = sync_api::SyncManager::Status::OFFLINE_UNSYNCED;
} else {
status_.summary = sync_api::SyncManager::Status::OFFLINE;
}
}
void AllStatus::OnSyncEngineEvent(const SyncEngineEvent& event) {
ScopedStatusLock lock(this);
switch (event.what_happened) {
case SyncEngineEvent::SYNC_CYCLE_ENDED:
case SyncEngineEvent::STATUS_CHANGED:
status_ = CalcSyncing(event);
break;
case SyncEngineEvent::STOP_SYNCING_PERMANENTLY:
case SyncEngineEvent::UPDATED_TOKEN:
case SyncEngineEvent::CLEAR_SERVER_DATA_FAILED:
case SyncEngineEvent::CLEAR_SERVER_DATA_SUCCEEDED:
break;
case SyncEngineEvent::ACTIONABLE_ERROR:
status_ = CreateBlankStatus();
status_.sync_protocol_error = event.snapshot->errors.sync_protocol_error;
break;
default:
LOG(ERROR) << "Unrecognized Syncer Event: " << event.what_happened;
break;
}
}
void AllStatus::HandleServerConnectionEvent(
const ServerConnectionEvent& event) {
ScopedStatusLock lock(this);
status_.server_up = IsGoodReplyFromServer(event.connection_code);
status_.server_reachable = event.server_reachable;
if (event.connection_code == HttpResponse::SERVER_CONNECTION_OK) {
status_.authenticated = true;
} else {
status_.authenticated = false;
}
}
sync_api::SyncManager::Status AllStatus::status() const {
base::AutoLock lock(mutex_);
return status_;
}
void AllStatus::SetNotificationsEnabled(bool notifications_enabled) {
ScopedStatusLock lock(this);
status_.notifications_enabled = notifications_enabled;
}
void AllStatus::IncrementNotifiableCommits() {
ScopedStatusLock lock(this);
++status_.notifiable_commits;
}
void AllStatus::IncrementNotificationsReceived() {
ScopedStatusLock lock(this);
++status_.notifications_received;
}
void AllStatus::SetEncryptedTypes(const syncable::ModelTypeSet& types) {
ScopedStatusLock lock(this);
status_.encrypted_types = types;
}
void AllStatus::SetCryptographerReady(bool ready) {
ScopedStatusLock lock(this);
status_.cryptographer_ready = ready;
}
void AllStatus::SetCryptoHasPendingKeys(bool has_pending_keys) {
ScopedStatusLock lock(this);
status_.crypto_has_pending_keys = has_pending_keys;
}
void AllStatus::SetUniqueId(const std::string& guid) {
ScopedStatusLock lock(this);
status_.unique_id = guid;
}
ScopedStatusLock::ScopedStatusLock(AllStatus* allstatus)
: allstatus_(allstatus) {
allstatus->mutex_.Acquire();
}
ScopedStatusLock::~ScopedStatusLock() {
allstatus_->CalcStatusChanges();
allstatus_->mutex_.Release();
}
} // namespace browser_sync
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