| /* |
| * Copyright (C) 2021 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.car.telemetry.publisher; |
| |
| import android.os.Handler; |
| |
| import com.android.car.CarPropertyService; |
| import com.android.car.telemetry.TelemetryProto; |
| |
| import java.io.File; |
| |
| /** |
| * Lazy factory class for Publishers. It's expected to have a single factory instance. |
| * Must be called from the telemetry thread. |
| * |
| * <p>It doesn't instantiate all the publishers right away, as in some cases some publishers are |
| * not needed. |
| * |
| * <p>Methods in this class must be called on telemetry thread unless specified as thread-safe. |
| */ |
| public class PublisherFactory { |
| private final Object mLock = new Object(); |
| private final CarPropertyService mCarPropertyService; |
| private final File mRootDirectory; |
| private final Handler mTelemetryHandler; |
| private final StatsManagerProxy mStatsManager; |
| private VehiclePropertyPublisher mVehiclePropertyPublisher; |
| private CarTelemetrydPublisher mCarTelemetrydPublisher; |
| private StatsPublisher mStatsPublisher; |
| |
| private AbstractPublisher.PublisherFailureListener mFailureListener; |
| |
| public PublisherFactory( |
| CarPropertyService carPropertyService, |
| Handler handler, |
| StatsManagerProxy statsManager, |
| File rootDirectory) { |
| mCarPropertyService = carPropertyService; |
| mTelemetryHandler = handler; |
| mStatsManager = statsManager; |
| mRootDirectory = rootDirectory; |
| } |
| |
| /** Returns the publisher by given type. This method is thread-safe. */ |
| public AbstractPublisher getPublisher(TelemetryProto.Publisher.PublisherCase type) { |
| // No need to optimize locks, as this method is infrequently called. |
| synchronized (mLock) { |
| switch (type.getNumber()) { |
| case TelemetryProto.Publisher.VEHICLE_PROPERTY_FIELD_NUMBER: |
| if (mVehiclePropertyPublisher == null) { |
| mVehiclePropertyPublisher = new VehiclePropertyPublisher( |
| mCarPropertyService, mFailureListener, mTelemetryHandler); |
| } |
| return mVehiclePropertyPublisher; |
| case TelemetryProto.Publisher.CARTELEMETRYD_FIELD_NUMBER: |
| if (mCarTelemetrydPublisher == null) { |
| mCarTelemetrydPublisher = new CarTelemetrydPublisher( |
| mFailureListener, mTelemetryHandler); |
| } |
| return mCarTelemetrydPublisher; |
| case TelemetryProto.Publisher.STATS_FIELD_NUMBER: |
| if (mStatsPublisher == null) { |
| mStatsPublisher = new StatsPublisher( |
| mFailureListener, mStatsManager, mRootDirectory, mTelemetryHandler); |
| } |
| return mStatsPublisher; |
| default: |
| throw new IllegalArgumentException( |
| "Publisher type " + type + " is not supported"); |
| } |
| } |
| } |
| |
| /** |
| * Removes all {@link com.android.car.telemetry.databroker.DataSubscriber} from all publishers. |
| */ |
| public void removeAllDataSubscribers() { |
| if (mVehiclePropertyPublisher != null) { |
| mVehiclePropertyPublisher.removeAllDataSubscribers(); |
| } |
| if (mCarTelemetrydPublisher != null) { |
| mCarTelemetrydPublisher.removeAllDataSubscribers(); |
| } |
| if (mStatsPublisher != null) { |
| mStatsPublisher.removeAllDataSubscribers(); |
| } |
| } |
| |
| /** |
| * Sets the publisher failure listener for all the publishers. This is expected to be called |
| * before {@link #getPublisher} method, because the listener is set after |
| * {@code PublisherFactory} initialized. This is not the best approach, but it suits for this |
| * case. |
| */ |
| public void setFailureListener(AbstractPublisher.PublisherFailureListener listener) { |
| mFailureListener = listener; |
| } |
| } |