mirror of
https://codeberg.org/Freeyourgadget/Gadgetbridge
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181 lines
6.2 KiB
Java
181 lines
6.2 KiB
Java
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/*
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* Copyright (C) 2016 The CyanogenMod Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package lineageos.weatherservice;
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import android.app.Service;
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import android.content.Context;
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import android.content.Intent;
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import android.os.Handler;
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import android.os.IBinder;
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import android.os.Looper;
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import android.os.Message;
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import lineageos.weather.RequestInfo;
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import java.util.Collections;
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import java.util.Set;
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import java.util.WeakHashMap;
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public abstract class WeatherProviderService extends Service {
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private Handler mHandler;
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private IWeatherProviderServiceClient mClient;
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private Set<ServiceRequest> mWeakRequestsSet
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= Collections.newSetFromMap(new WeakHashMap<ServiceRequest, Boolean>());
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/**
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* The {@link android.content.Intent} action that must be declared as handled by a service in
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* its manifest for the system to recognize it as a weather provider service
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*/
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public static final String SERVICE_INTERFACE
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= "lineageos.weatherservice.WeatherProviderService";
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/**
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* Name under which a {@link WeatherProviderService} publishes information about itself.
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* This meta-data must reference an XML resource containing
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* a <code><weather-provider-service></code>
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* tag.
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*/
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public static final String SERVICE_META_DATA = "lineageos.weatherservice";
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@Override
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protected final void attachBaseContext(Context base) {
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super.attachBaseContext(base);
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mHandler = new ServiceHandler(base.getMainLooper());
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}
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@Override
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public final IBinder onBind(Intent intent) {
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return mBinder;
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}
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private final IWeatherProviderService.Stub mBinder = new IWeatherProviderService.Stub() {
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@Override
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public void processWeatherUpdateRequest(final RequestInfo info) {
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mHandler.obtainMessage(ServiceHandler.MSG_ON_NEW_REQUEST, info).sendToTarget();
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}
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@Override
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public void processCityNameLookupRequest(final RequestInfo info) {
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mHandler.obtainMessage(ServiceHandler.MSG_ON_NEW_REQUEST, info).sendToTarget();
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}
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@Override
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public void setServiceClient(IWeatherProviderServiceClient client) {
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mHandler.obtainMessage(ServiceHandler.MSG_SET_CLIENT, client).sendToTarget();
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}
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@Override
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public void cancelOngoingRequests() {
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synchronized (mWeakRequestsSet) {
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for (final ServiceRequest request : mWeakRequestsSet) {
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request.cancel();
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mWeakRequestsSet.remove(request);
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mHandler.obtainMessage(ServiceHandler.MSG_CANCEL_REQUEST, request)
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.sendToTarget();
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}
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}
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}
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@Override
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public void cancelRequest(int requestId) {
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synchronized (mWeakRequestsSet) {
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for (final ServiceRequest request : mWeakRequestsSet) {
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if (request.getRequestInfo().hashCode() == requestId) {
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mWeakRequestsSet.remove(request);
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request.cancel();
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mHandler.obtainMessage(ServiceHandler.MSG_CANCEL_REQUEST, request)
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.sendToTarget();
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break;
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}
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}
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}
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}
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};
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private class ServiceHandler extends Handler {
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public ServiceHandler(Looper looper) {
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super(looper);
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}
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public static final int MSG_SET_CLIENT = 1;
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public static final int MSG_ON_NEW_REQUEST = 2;
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public static final int MSG_CANCEL_REQUEST = 3;
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@Override
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public void handleMessage(Message msg) {
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switch (msg.what) {
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case MSG_SET_CLIENT: {
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mClient = (IWeatherProviderServiceClient) msg.obj;
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if (mClient != null) {
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onConnected();
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} else {
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onDisconnected();
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}
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return;
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}
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case MSG_ON_NEW_REQUEST: {
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RequestInfo info = (RequestInfo) msg.obj;
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if (info != null) {
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ServiceRequest request = new ServiceRequest(info, mClient);
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synchronized (mWeakRequestsSet) {
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mWeakRequestsSet.add(request);
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}
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onRequestSubmitted(request);
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}
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return;
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}
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case MSG_CANCEL_REQUEST: {
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ServiceRequest request = (ServiceRequest) msg.obj;
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onRequestCancelled(request);
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return;
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}
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}
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}
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}
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/**
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* The system has connected to this service.
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*/
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protected void onConnected() {
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/* Do nothing */
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}
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/**
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* The system has disconnected from this service.
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*/
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protected void onDisconnected() {
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/* Do nothing */
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}
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/**
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* A new request has been submitted to this service
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* @param request The service request to be processed by this service
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*/
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protected abstract void onRequestSubmitted(ServiceRequest request);
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/**
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* Called when the system is not interested on this request anymore. Note that the service
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* <b>has marked the request as cancelled</b> and you must stop any ongoing operation
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* (such as pulling data from internet) that this service could've been performing to honor the
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* request.
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*
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* @param request The request cancelled by the system
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*/
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protected abstract void onRequestCancelled(ServiceRequest request);
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}
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