1 /*
2  * Copyright (c) 2021, The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package android.automotive.telemetry.internal;
18 
19 import android.automotive.telemetry.internal.ICarDataListener;
20 
21 /**
22  * An internal API provided by cartelemetryd for receiving the collected data.
23  */
24 interface ICarTelemetryInternal {
25   /**
26    * Sets a listener for CarData. If there are existing CarData in the buffer, the daemon will
27    * start pushing them to the listener. There can be only a single registered listener at a time.
28    *
29    * @param listener the only listener.
30    * @throws IllegalStateException if someone is already registered or the listener is dead.
31    */
setListener(in ICarDataListener listener)32   void setListener(in ICarDataListener listener);
33 
34   /**
35    * Clears the listener if exists. Silently ignores if there is no listener.
36    */
clearListener()37   void clearListener();
38 }
39