| /* |
| * Copyright (C) 2009 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.server.location; |
| |
| import android.annotation.Nullable; |
| import android.content.Context; |
| import android.location.LocationProvider; |
| import android.os.Bundle; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.os.WorkSource; |
| import android.util.Log; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.location.ILocationProvider; |
| import com.android.internal.location.ProviderProperties; |
| import com.android.internal.location.ProviderRequest; |
| import com.android.internal.os.BackgroundThread; |
| import com.android.internal.os.TransferPipe; |
| import com.android.server.LocationManagerService; |
| import com.android.server.ServiceWatcher; |
| |
| import java.io.FileDescriptor; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| |
| /** |
| * Proxy for ILocationProvider implementations. |
| */ |
| public class LocationProviderProxy implements LocationProviderInterface { |
| private static final String TAG = "LocationProviderProxy"; |
| private static final boolean D = LocationManagerService.D; |
| |
| private final ServiceWatcher mServiceWatcher; |
| |
| private final String mName; |
| |
| // used to ensure that updates to mRequest and mWorkSource are atomic |
| private final Object mRequestLock = new Object(); |
| |
| |
| private volatile boolean mEnabled = false; |
| @Nullable |
| private volatile ProviderProperties mProperties; |
| |
| @GuardedBy("mRequestLock") |
| @Nullable |
| private ProviderRequest mRequest; |
| @GuardedBy("mRequestLock") |
| private WorkSource mWorkSource; |
| |
| /** |
| * Creates a new LocationProviderProxy and immediately begins binding to the best applicable |
| * service. |
| */ |
| @Nullable |
| public static LocationProviderProxy createAndBind( |
| Context context, String name, String action, |
| int overlaySwitchResId, int defaultServicePackageNameResId, |
| int initialPackageNamesResId) { |
| LocationProviderProxy proxy = new LocationProviderProxy(context, name, |
| action, overlaySwitchResId, defaultServicePackageNameResId, |
| initialPackageNamesResId); |
| if (proxy.bind()) { |
| return proxy; |
| } else { |
| return null; |
| } |
| } |
| |
| private LocationProviderProxy(Context context, String name, |
| String action, int overlaySwitchResId, int defaultServicePackageNameResId, |
| int initialPackageNamesResId) { |
| |
| mServiceWatcher = new ServiceWatcher(context, TAG, action, overlaySwitchResId, |
| defaultServicePackageNameResId, initialPackageNamesResId, |
| BackgroundThread.getHandler()) { |
| @Override |
| protected void onBind() { |
| runOnBinder(LocationProviderProxy.this::initializeService); |
| } |
| }; |
| mName = name; |
| |
| mProperties = null; |
| mRequest = null; |
| mWorkSource = new WorkSource(); |
| } |
| |
| private boolean bind() { |
| return mServiceWatcher.start(); |
| } |
| |
| private void initializeService(IBinder binder) { |
| ILocationProvider service = ILocationProvider.Stub.asInterface(binder); |
| if (D) Log.d(TAG, "applying state to connected service"); |
| |
| ProviderProperties[] properties = new ProviderProperties[1]; |
| ProviderRequest request; |
| WorkSource source; |
| synchronized (mRequestLock) { |
| request = mRequest; |
| source = mWorkSource; |
| } |
| |
| try { |
| // load properties from provider |
| properties[0] = service.getProperties(); |
| if (properties[0] == null) { |
| Log.e(TAG, mServiceWatcher.getCurrentPackageName() |
| + " has invalid location provider properties"); |
| } |
| |
| // apply current state to new service |
| if (mEnabled) { |
| service.enable(); |
| if (request != null) { |
| service.setRequest(request, source); |
| } |
| } |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } |
| |
| mProperties = properties[0]; |
| } |
| |
| public String getConnectedPackageName() { |
| return mServiceWatcher.getCurrentPackageName(); |
| } |
| |
| @Override |
| public String getName() { |
| return mName; |
| } |
| |
| @Override |
| public ProviderProperties getProperties() { |
| return mProperties; |
| } |
| |
| @Override |
| public void enable() { |
| mEnabled = true; |
| mServiceWatcher.runOnBinder(binder -> { |
| ILocationProvider service = ILocationProvider.Stub.asInterface(binder); |
| try { |
| service.enable(); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } |
| }); |
| } |
| |
| @Override |
| public void disable() { |
| mEnabled = false; |
| mServiceWatcher.runOnBinder(binder -> { |
| ILocationProvider service = ILocationProvider.Stub.asInterface(binder); |
| try { |
| service.disable(); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } |
| }); |
| } |
| |
| @Override |
| public boolean isEnabled() { |
| return mEnabled; |
| } |
| |
| @Override |
| public void setRequest(ProviderRequest request, WorkSource source) { |
| synchronized (mRequestLock) { |
| mRequest = request; |
| mWorkSource = source; |
| } |
| mServiceWatcher.runOnBinder(binder -> { |
| ILocationProvider service = ILocationProvider.Stub.asInterface(binder); |
| try { |
| service.setRequest(request, source); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } |
| }); |
| } |
| |
| @Override |
| public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| pw.append("REMOTE SERVICE"); |
| pw.append(" name=").append(mName); |
| pw.append(" pkg=").append(mServiceWatcher.getCurrentPackageName()); |
| pw.append(" version=").append(Integer.toString(mServiceWatcher.getCurrentPackageVersion())); |
| pw.append('\n'); |
| mServiceWatcher.runOnBinder(binder -> { |
| ILocationProvider service = ILocationProvider.Stub.asInterface(binder); |
| try { |
| TransferPipe.dumpAsync(service.asBinder(), fd, args); |
| } catch (IOException | RemoteException e) { |
| pw.println("Failed to dump location provider: " + e); |
| } |
| }); |
| } |
| |
| @Override |
| public int getStatus(Bundle extras) { |
| int[] result = new int[]{LocationProvider.TEMPORARILY_UNAVAILABLE}; |
| mServiceWatcher.runOnBinder(binder -> { |
| ILocationProvider service = ILocationProvider.Stub.asInterface(binder); |
| try { |
| result[0] = service.getStatus(extras); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } |
| }); |
| return result[0]; |
| } |
| |
| @Override |
| public long getStatusUpdateTime() { |
| long[] result = new long[]{0L}; |
| mServiceWatcher.runOnBinder(binder -> { |
| ILocationProvider service = ILocationProvider.Stub.asInterface(binder); |
| try { |
| result[0] = service.getStatusUpdateTime(); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } |
| }); |
| return result[0]; |
| } |
| |
| @Override |
| public boolean sendExtraCommand(String command, Bundle extras) { |
| boolean[] result = new boolean[]{false}; |
| mServiceWatcher.runOnBinder(binder -> { |
| ILocationProvider service = ILocationProvider.Stub.asInterface(binder); |
| try { |
| result[0] = service.sendExtraCommand(command, extras); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } |
| }); |
| return result[0]; |
| } |
| } |