| /* |
| * 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 java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| |
| import android.content.Context; |
| import android.location.LocationProvider; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.RemoteException; |
| import android.os.WorkSource; |
| import android.util.Log; |
| |
| import com.android.internal.location.ProviderProperties; |
| import com.android.internal.location.ILocationProvider; |
| import com.android.internal.location.ProviderRequest; |
| import com.android.server.LocationManagerService; |
| import com.android.server.ServiceWatcher; |
| |
| /** |
| * Proxy for ILocationProvider implementations. |
| */ |
| public class LocationProviderProxy implements LocationProviderInterface { |
| private static final String TAG = "LocationProviderProxy"; |
| private static final boolean D = LocationManagerService.D; |
| |
| private final Context mContext; |
| private final String mName; |
| private final ServiceWatcher mServiceWatcher; |
| |
| private Object mLock = new Object(); |
| |
| // cached values set by the location manager, synchronized on mLock |
| private ProviderProperties mProperties; |
| private boolean mEnabled = false; |
| private ProviderRequest mRequest = null; |
| private WorkSource mWorksource = new WorkSource(); |
| |
| public static LocationProviderProxy createAndBind( |
| Context context, String name, String action, |
| int overlaySwitchResId, int defaultServicePackageNameResId, |
| int initialPackageNamesResId, Handler handler) { |
| LocationProviderProxy proxy = new LocationProviderProxy(context, name, action, |
| overlaySwitchResId, defaultServicePackageNameResId, initialPackageNamesResId, |
| handler); |
| if (proxy.bind()) { |
| return proxy; |
| } else { |
| return null; |
| } |
| } |
| |
| private LocationProviderProxy(Context context, String name, String action, |
| int overlaySwitchResId, int defaultServicePackageNameResId, |
| int initialPackageNamesResId, Handler handler) { |
| mContext = context; |
| mName = name; |
| mServiceWatcher = new ServiceWatcher(mContext, TAG + "-" + name, action, overlaySwitchResId, |
| defaultServicePackageNameResId, initialPackageNamesResId, |
| mNewServiceWork, handler); |
| } |
| |
| private boolean bind () { |
| return mServiceWatcher.start(); |
| } |
| |
| private ILocationProvider getService() { |
| return ILocationProvider.Stub.asInterface(mServiceWatcher.getBinder()); |
| } |
| |
| public String getConnectedPackageName() { |
| return mServiceWatcher.getBestPackageName(); |
| } |
| |
| /** |
| * Work to apply current state to a newly connected provider. |
| * Remember we can switch the service that implements a providers |
| * at run-time, so need to apply current state. |
| */ |
| private Runnable mNewServiceWork = new Runnable() { |
| @Override |
| public void run() { |
| if (D) Log.d(TAG, "applying state to connected service"); |
| |
| boolean enabled; |
| ProviderProperties properties = null; |
| ProviderRequest request; |
| WorkSource source; |
| ILocationProvider service; |
| synchronized (mLock) { |
| enabled = mEnabled; |
| request = mRequest; |
| source = mWorksource; |
| service = getService(); |
| } |
| |
| if (service == null) return; |
| |
| try { |
| // load properties from provider |
| properties = service.getProperties(); |
| if (properties == null) { |
| Log.e(TAG, mServiceWatcher.getBestPackageName() + |
| " has invalid locatino provider properties"); |
| } |
| |
| // apply current state to new service |
| if (enabled) { |
| service.enable(); |
| if (request != null) { |
| service.setRequest(request, source); |
| } |
| } |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } catch (Exception e) { |
| // never let remote service crash system server |
| Log.e(TAG, "Exception from " + mServiceWatcher.getBestPackageName(), e); |
| } |
| |
| synchronized (mLock) { |
| mProperties = properties; |
| } |
| } |
| }; |
| |
| @Override |
| public String getName() { |
| return mName; |
| } |
| |
| @Override |
| public ProviderProperties getProperties() { |
| synchronized (mLock) { |
| return mProperties; |
| } |
| } |
| |
| @Override |
| public void enable() { |
| synchronized (mLock) { |
| mEnabled = true; |
| } |
| ILocationProvider service = getService(); |
| if (service == null) return; |
| |
| try { |
| service.enable(); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } catch (Exception e) { |
| // never let remote service crash system server |
| Log.e(TAG, "Exception from " + mServiceWatcher.getBestPackageName(), e); |
| } |
| } |
| |
| @Override |
| public void disable() { |
| synchronized (mLock) { |
| mEnabled = false; |
| } |
| ILocationProvider service = getService(); |
| if (service == null) return; |
| |
| try { |
| service.disable(); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } catch (Exception e) { |
| // never let remote service crash system server |
| Log.e(TAG, "Exception from " + mServiceWatcher.getBestPackageName(), e); |
| } |
| } |
| |
| @Override |
| public boolean isEnabled() { |
| synchronized (mLock) { |
| return mEnabled; |
| } |
| } |
| |
| @Override |
| public void setRequest(ProviderRequest request, WorkSource source) { |
| synchronized (mLock) { |
| mRequest = request; |
| mWorksource = source; |
| } |
| ILocationProvider service = getService(); |
| if (service == null) return; |
| |
| try { |
| service.setRequest(request, source); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } catch (Exception e) { |
| // never let remote service crash system server |
| Log.e(TAG, "Exception from " + mServiceWatcher.getBestPackageName(), 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.getBestPackageName()); |
| pw.append(" version=").append("" + mServiceWatcher.getBestVersion()); |
| pw.append('\n'); |
| |
| ILocationProvider service = getService(); |
| if (service == null) { |
| pw.println("service down (null)"); |
| return; |
| } |
| pw.flush(); |
| |
| try { |
| service.asBinder().dump(fd, args); |
| } catch (RemoteException e) { |
| pw.println("service down (RemoteException)"); |
| Log.w(TAG, e); |
| } catch (Exception e) { |
| pw.println("service down (Exception)"); |
| // never let remote service crash system server |
| Log.e(TAG, "Exception from " + mServiceWatcher.getBestPackageName(), e); |
| } |
| } |
| |
| @Override |
| public int getStatus(Bundle extras) { |
| ILocationProvider service = getService(); |
| if (service == null) return LocationProvider.TEMPORARILY_UNAVAILABLE; |
| |
| try { |
| return service.getStatus(extras); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } catch (Exception e) { |
| // never let remote service crash system server |
| Log.e(TAG, "Exception from " + mServiceWatcher.getBestPackageName(), e); |
| } |
| return LocationProvider.TEMPORARILY_UNAVAILABLE; |
| } |
| |
| @Override |
| public long getStatusUpdateTime() { |
| ILocationProvider service = getService(); |
| if (service == null) return 0; |
| |
| try { |
| return service.getStatusUpdateTime(); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } catch (Exception e) { |
| // never let remote service crash system server |
| Log.e(TAG, "Exception from " + mServiceWatcher.getBestPackageName(), e); |
| } |
| return 0; |
| } |
| |
| @Override |
| public boolean sendExtraCommand(String command, Bundle extras) { |
| ILocationProvider service = getService(); |
| if (service == null) return false; |
| |
| try { |
| return service.sendExtraCommand(command, extras); |
| } catch (RemoteException e) { |
| Log.w(TAG, e); |
| } catch (Exception e) { |
| // never let remote service crash system server |
| Log.e(TAG, "Exception from " + mServiceWatcher.getBestPackageName(), e); |
| } |
| return false; |
| } |
| } |