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 "dataobs_mgr_client.h"
17
18 #include "hilog_wrapper.h"
19 #include "if_system_ability_manager.h"
20 #include "iservice_registry.h"
21 #include "system_ability_definition.h"
22
23 namespace OHOS {
24 namespace AAFwk {
25 std::shared_ptr<DataObsMgrClient> DataObsMgrClient::instance_ = nullptr;
26 std::mutex DataObsMgrClient::mutex_;
27
GetInstance()28 std::shared_ptr<DataObsMgrClient> DataObsMgrClient::GetInstance()
29 {
30 if (instance_ == nullptr) {
31 std::lock_guard<std::mutex> lock_l(mutex_);
32 if (instance_ == nullptr) {
33 instance_ = std::make_shared<DataObsMgrClient>();
34 }
35 }
36 return instance_;
37 }
38
DataObsMgrClient()39 DataObsMgrClient::DataObsMgrClient()
40 {}
41
~DataObsMgrClient()42 DataObsMgrClient::~DataObsMgrClient()
43 {}
44
45 /**
46 * Registers an observer to DataObsMgr specified by the given Uri.
47 *
48 * @param uri, Indicates the path of the data to operate.
49 * @param dataObserver, Indicates the IDataAbilityObserver object.
50 *
51 * @return Returns ERR_OK on success, others on failure.
52 */
RegisterObserver(const Uri & uri,const sptr<IDataAbilityObserver> & dataObserver)53 ErrCode DataObsMgrClient::RegisterObserver(const Uri &uri, const sptr<IDataAbilityObserver> &dataObserver)
54 {
55 if (remoteObject_ == nullptr) {
56 ErrCode err = Connect();
57 if (err != ERR_OK) {
58 return DATAOBS_SERVICE_NOT_CONNECTED;
59 }
60 }
61 sptr<IDataObsMgr> doms = iface_cast<IDataObsMgr>(remoteObject_);
62 return doms->RegisterObserver(uri, dataObserver);
63 }
64
65 /**
66 * Deregisters an observer used for DataObsMgr specified by the given Uri.
67 *
68 * @param uri, Indicates the path of the data to operate.
69 * @param dataObserver, Indicates the IDataAbilityObserver object.
70 *
71 * @return Returns ERR_OK on success, others on failure.
72 */
UnregisterObserver(const Uri & uri,const sptr<IDataAbilityObserver> & dataObserver)73 ErrCode DataObsMgrClient::UnregisterObserver(const Uri &uri, const sptr<IDataAbilityObserver> &dataObserver)
74 {
75 if (remoteObject_ == nullptr) {
76 ErrCode err = Connect();
77 if (err != ERR_OK) {
78 return DATAOBS_SERVICE_NOT_CONNECTED;
79 }
80 }
81 sptr<IDataObsMgr> doms = iface_cast<IDataObsMgr>(remoteObject_);
82 return doms->UnregisterObserver(uri, dataObserver);
83 }
84
85 /**
86 * Notifies the registered observers of a change to the data resource specified by Uri.
87 *
88 * @param uri, Indicates the path of the data to operate.
89 *
90 * @return Returns ERR_OK on success, others on failure.
91 */
NotifyChange(const Uri & uri)92 ErrCode DataObsMgrClient::NotifyChange(const Uri &uri)
93 {
94 if (remoteObject_ == nullptr) {
95 ErrCode err = Connect();
96 if (err != ERR_OK) {
97 return DATAOBS_SERVICE_NOT_CONNECTED;
98 }
99 }
100 sptr<IDataObsMgr> doms = iface_cast<IDataObsMgr>(remoteObject_);
101 return doms->NotifyChange(uri);
102 }
103
104 /**
105 * Connect dataobs manager service.
106 *
107 * @return Returns ERR_OK on success, others on failure.
108 */
Connect()109 ErrCode DataObsMgrClient::Connect()
110 {
111 std::lock_guard<std::mutex> lock(mutex_);
112 if (remoteObject_ != nullptr) {
113 return ERR_OK;
114 }
115 sptr<ISystemAbilityManager> systemManager = SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();
116 if (systemManager == nullptr) {
117 HILOG_ERROR("%{private}s:fail to get Registry", __func__);
118 return GET_DATAOBS_SERVICE_FAILED;
119 }
120 remoteObject_ = systemManager->GetSystemAbility(DATAOBS_MGR_SERVICE_SA_ID);
121 if (remoteObject_ == nullptr) {
122 HILOG_ERROR("%{private}s:fail to connect DataObsMgrService", __func__);
123 return GET_DATAOBS_SERVICE_FAILED;
124 }
125 HILOG_DEBUG("connect DataObsMgrService success");
126 return ERR_OK;
127 }
128 } // namespace AAFwk
129 } // namespace OHOS
130