harmony(鸿蒙)Changelog
Changelog
Key API/Component Changes
IPC Subsystem
cl.rpc.1 sendRequest Return Value Type Change
Change Impact
The sendRequest method in the JS modules RemoteProxy and RemoteObject is changed to an asynchronous interface. The new version uses a Promise object to return a SendRequestResult instance. Existing applications need to be adapted.
Key API/Component Changes
Module: ohos.rpc.IRemoteObject, ohos.rpc.RemoteProxy and ohos.rpc.RemoteObject
Old method: sendRequest(code: number, data: MessageParcel, reply: MessageParcel, options: MessageOption): boolean
New method:
sendRequest(code: number, data: MessageParcel, reply: MessageParcel, options: MessageOption): Promise<SendRequestResult>
Adaptation Guidelines
import rpc from "@ohos.rpc"
import FA from "@ohos.ability.featureAbility";
let proxy;
let connect = {
onConnect: function(elementName, remoteProxy) {
console.log("RpcClient: js onConnect called.");
proxy = remoteProxy;
},
onDisconnect: function(elementName) {
console.log("RpcClient: onDisconnect");
},
onFailed: function() {
console.log("RpcClient: onFailed");
}
};
let want = {
"bundleName": "com.ohos.server",
"abilityName": "com.ohos.server.MainAbility",
};
FA.connectAbility(want, connect);
let option = new rpc.MessageOption()
let data = rpc.MessageParcel.create()
let reply = rpc.MessageParcel.create()
proxy.sendRequest(1, data, reply, option)
.then(function(result) {
console.info("send request done")
if (result.errCode === 0) {
// read result from result.reply
}
})
.catch(function(e) {
console.error("send request failed: " + e)
})
.finally(() => {
data.reclaim()
reply.reclaim()
})
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