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| 1 // Copyright 2015 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 "components/arc/arc_bridge_service_impl.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #include "base/memory/ref_counted.h" | |
| 9 #include "base/task_runner.h" | |
| 10 #include "components/arc/arc_session.h" | |
| 11 | |
| 12 namespace arc { | |
| 13 namespace { | |
| 14 | |
| 15 constexpr base::TimeDelta kDefaultRestartDelay = | |
| 16 base::TimeDelta::FromSeconds(5); | |
| 17 | |
| 18 } // namespace | |
| 19 | |
| 20 ArcBridgeServiceImpl::ArcBridgeServiceImpl( | |
| 21 const scoped_refptr<base::TaskRunner>& blocking_task_runner) | |
| 22 : restart_delay_(kDefaultRestartDelay), | |
| 23 factory_(base::Bind(ArcSession::Create, this, blocking_task_runner)), | |
| 24 weak_ptr_factory_(this) {} | |
| 25 | |
| 26 ArcBridgeServiceImpl::~ArcBridgeServiceImpl() { | |
| 27 DCHECK(CalledOnValidThread()); | |
| 28 if (arc_session_) | |
| 29 arc_session_->RemoveObserver(this); | |
| 30 } | |
| 31 | |
| 32 void ArcBridgeServiceImpl::RequestStart() { | |
| 33 DCHECK(CalledOnValidThread()); | |
| 34 | |
| 35 // Consecutive RequestStart() call. Do nothing. | |
| 36 if (running_) | |
| 37 return; | |
| 38 | |
| 39 VLOG(1) << "Session started"; | |
| 40 running_ = true; | |
| 41 // Here the |running_| becomes false to true. So, |restart_timer_| must be | |
| 42 // stopped (either not even started, or has been cancelled in previous | |
| 43 // RequestStop() call). | |
| 44 DCHECK(!restart_timer_.IsRunning()); | |
| 45 | |
| 46 if (arc_session_) { | |
| 47 // This case, a client calls RequestStop() in advance, then soon | |
| 48 // RequestStart(). In such a case, |arc_session_| must be requested | |
| 49 // to stop already. Then, do nothing now, and later in OnSessionStopped(), | |
| 50 // restarting should be handled. | |
| 51 DCHECK_EQ(state(), State::STOPPING); | |
| 52 } else { | |
| 53 DCHECK_EQ(state(), State::STOPPED); | |
| 54 StartArcSession(); | |
| 55 } | |
| 56 } | |
| 57 | |
| 58 void ArcBridgeServiceImpl::RequestStop() { | |
| 59 DCHECK(CalledOnValidThread()); | |
| 60 | |
| 61 // Consecutive RequestStop() call. Do nothing. | |
| 62 if (!running_) | |
| 63 return; | |
| 64 | |
| 65 VLOG(1) << "Session ended"; | |
| 66 running_ = false; | |
| 67 | |
| 68 if (arc_session_) { | |
| 69 // The |state_| could be either STARTING, RUNNING or STOPPING. | |
| 70 DCHECK_NE(state(), State::STOPPED); | |
| 71 | |
| 72 // STOPPING is found in the senario of "RequestStart() -> RequestStop() | |
| 73 // -> RequestStart() -> RequestStop()" case. | |
| 74 // In the first RequestStop() call, |state_| is set to STOPPING, | |
| 75 // and in the second RequestStop() finds it (so this is the second call). | |
| 76 // In that case, ArcSession::Stop() is already called, so do nothing. | |
| 77 if (state() != State::STOPPING) { | |
| 78 SetState(State::STOPPING); | |
| 79 arc_session_->Stop(); | |
| 80 } | |
| 81 } else { | |
| 82 DCHECK_EQ(state(), State::STOPPED); | |
| 83 // In case restarting is in progress, cancel it. | |
| 84 restart_timer_.Stop(); | |
| 85 } | |
| 86 } | |
| 87 | |
| 88 void ArcBridgeServiceImpl::OnShutdown() { | |
| 89 DCHECK(CalledOnValidThread()); | |
| 90 | |
| 91 VLOG(1) << "OnShutdown"; | |
| 92 running_ = false; | |
| 93 restart_timer_.Stop(); | |
| 94 if (arc_session_) | |
| 95 arc_session_->OnShutdown(); | |
| 96 // ArcSession::OnShutdown() invokes OnSessionStopped() synchronously. | |
| 97 // In the observer method, |arc_session_| should be destroyed. | |
| 98 DCHECK(!arc_session_); | |
| 99 } | |
| 100 | |
| 101 void ArcBridgeServiceImpl::SetArcSessionFactoryForTesting( | |
| 102 const ArcSessionFactory& factory) { | |
| 103 DCHECK(!factory.is_null()); | |
| 104 DCHECK_EQ(state(), State::STOPPED); | |
| 105 DCHECK(!arc_session_); | |
| 106 DCHECK(!restart_timer_.IsRunning()); | |
| 107 factory_ = factory; | |
| 108 } | |
| 109 | |
| 110 void ArcBridgeServiceImpl::SetRestartDelayForTesting( | |
| 111 const base::TimeDelta& restart_delay) { | |
| 112 DCHECK_EQ(state(), State::STOPPED); | |
| 113 DCHECK(!arc_session_); | |
| 114 DCHECK(!restart_timer_.IsRunning()); | |
| 115 restart_delay_ = restart_delay; | |
| 116 } | |
| 117 | |
| 118 void ArcBridgeServiceImpl::StartArcSession() { | |
| 119 DCHECK(CalledOnValidThread()); | |
| 120 DCHECK_EQ(state(), State::STOPPED); | |
| 121 DCHECK(!arc_session_); | |
| 122 DCHECK(!restart_timer_.IsRunning()); | |
| 123 | |
| 124 VLOG(1) << "Starting ARC instance"; | |
| 125 SetStopReason(StopReason::SHUTDOWN); | |
| 126 arc_session_ = factory_.Run(); | |
| 127 arc_session_->AddObserver(this); | |
| 128 SetState(State::STARTING); | |
| 129 arc_session_->Start(); | |
| 130 } | |
| 131 | |
| 132 void ArcBridgeServiceImpl::OnSessionReady() { | |
| 133 DCHECK(CalledOnValidThread()); | |
| 134 DCHECK_EQ(state(), State::STARTING); | |
| 135 DCHECK(arc_session_); | |
| 136 DCHECK(!restart_timer_.IsRunning()); | |
| 137 | |
| 138 VLOG(0) << "ARC ready"; | |
| 139 SetState(State::RUNNING); | |
| 140 } | |
| 141 | |
| 142 void ArcBridgeServiceImpl::OnSessionStopped(StopReason stop_reason) { | |
| 143 DCHECK(CalledOnValidThread()); | |
| 144 DCHECK_NE(state(), State::STOPPED); | |
| 145 DCHECK(arc_session_); | |
| 146 DCHECK(!restart_timer_.IsRunning()); | |
| 147 | |
| 148 VLOG(0) << "ARC stopped: " << stop_reason; | |
| 149 arc_session_->RemoveObserver(this); | |
| 150 arc_session_.reset(); | |
| 151 | |
| 152 // If READY, ARC instance is unexpectedly crashed so we need to restart it | |
| 153 // automatically. If STOPPING, it is the result of consecutive RequestStop() | |
| 154 // followed by RequestStart() invocation. | |
| 155 // If CONNECTING, ARC instance has not been booted properly, so do not | |
| 156 // restart it automatically. | |
| 157 if (running_ && (state() == State::RUNNING || state() == State::STOPPING)) { | |
| 158 // There was a previous invocation and it crashed for some reason. Try | |
| 159 // starting ARC instance later again. | |
| 160 // Note that even |restart_delay_| is 0 (for testing), it needs to | |
| 161 // PostTask, because observer callback may call RequestStart()/Stop(), | |
| 162 // which can change restarting. | |
| 163 VLOG(0) << "ARC restarting"; | |
| 164 restart_timer_.Start(FROM_HERE, restart_delay_, | |
| 165 base::Bind(&ArcBridgeServiceImpl::StartArcSession, | |
| 166 weak_ptr_factory_.GetWeakPtr())); | |
| 167 } | |
| 168 | |
| 169 SetStopReason(stop_reason); | |
| 170 SetState(State::STOPPED); | |
| 171 } | |
| 172 | |
| 173 } // namespace arc | |
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Chromium Code Reviews
Issue 2574013003:
Refactor ArcSessionRunner part 1. (Closed)
