1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "common_event_death_recipient.h"
17
18 #include "common_event.h"
19 #include "iservice_registry.h"
20 #include "event_log_wrapper.h"
21 #include "refbase.h"
22 #include "system_ability_definition.h"
23 #include <memory>
24 #include <mutex>
25
26 namespace OHOS {
27 namespace EventFwk {
~CommonEventDeathRecipient()28 CommonEventDeathRecipient::~CommonEventDeathRecipient()
29 {
30 if (statusChangeListener_ != nullptr) {
31 auto samgrProxy = SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();
32 if (samgrProxy == nullptr) {
33 EVENT_LOGE("GetSystemAbilityManager failed");
34 return;
35 }
36
37 int32_t ret = samgrProxy->UnSubscribeSystemAbility(COMMON_EVENT_SERVICE_ID, statusChangeListener_);
38 if (ret != ERR_OK) {
39 EVENT_LOGE("SubscribeSystemAbility to sa manager failed");
40 return;
41 }
42 statusChangeListener_ = nullptr;
43 }
44 }
45
SubscribeSAManager()46 void CommonEventDeathRecipient::SubscribeSAManager()
47 {
48 if (statusChangeListener_ == nullptr) {
49 std::lock_guard<ffrt::mutex> lock(listenerMutex_);
50 if (statusChangeListener_ == nullptr) {
51 auto samgrProxy = SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();
52 if (samgrProxy == nullptr) {
53 EVENT_LOGE("GetSystemAbilityManager failed");
54 return;
55 }
56
57 sptr<SystemAbilityStatusChangeListener> listener =
58 new (std::nothrow) CommonEventDeathRecipient::SystemAbilityStatusChangeListener();
59 if (listener == nullptr) {
60 EVENT_LOGE("new SystemAbilityStatusChangeListener failed");
61 return;
62 }
63 int32_t ret = samgrProxy->SubscribeSystemAbility(COMMON_EVENT_SERVICE_ID, listener);
64 if (ret != ERR_OK) {
65 EVENT_LOGE("SubscribeSystemAbility to sa manager failed");
66 return;
67 }
68 statusChangeListener_ = listener;
69 }
70 }
71 }
72
SystemAbilityStatusChangeListener()73 CommonEventDeathRecipient::SystemAbilityStatusChangeListener::SystemAbilityStatusChangeListener()
74 {
75 queue_ = std::make_shared<ffrt::queue>("cesResubMain");
76 }
77
OnAddSystemAbility(int32_t systemAbilityId,const std::string & deviceId)78 void CommonEventDeathRecipient::SystemAbilityStatusChangeListener::OnAddSystemAbility(
79 int32_t systemAbilityId, const std::string& deviceId)
80 {
81 std::lock_guard<ffrt::mutex> lock(mutex_);
82 if (!isSAOffline_) {
83 return;
84 }
85 EVENT_LOGI("CES restarted, try to reconnect");
86 if (CommonEvent::GetInstance()->Reconnect()) {
87 auto resubscrebeFund = [] () {
88 CommonEvent::GetInstance()->Resubscribe();
89 };
90 queue_->submit(resubscrebeFund);
91 isSAOffline_ = false;
92 }
93 }
94
OnRemoveSystemAbility(int32_t systemAbilityId,const std::string & deviceId)95 void CommonEventDeathRecipient::SystemAbilityStatusChangeListener::OnRemoveSystemAbility(
96 int32_t systemAbilityId, const std::string& deviceId)
97 {
98 EVENT_LOGI("CES died");
99 std::lock_guard<ffrt::mutex> lock(mutex_);
100 isSAOffline_ = true;
101 }
102 } // namespace EventFwk
103 } // namespace OHOS
104