Java tutorial
/** * Copyright (C) 2016 by Johan von Forstner under the MIT license: * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and * associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package de.geeksfactory.opacclient.webservice; import android.app.IntentService; import android.content.Context; import android.content.Intent; import android.support.v4.content.LocalBroadcastManager; import android.util.Log; import org.acra.ACRA; import org.json.JSONException; import java.io.File; import java.io.FileWriter; import java.io.IOException; import de.geeksfactory.opacclient.BuildConfig; import de.geeksfactory.opacclient.OpacClient; import de.geeksfactory.opacclient.storage.JsonSearchFieldDataSource; import de.geeksfactory.opacclient.storage.PreferenceDataSource; import de.geeksfactory.opacclient.utils.ErrorReporter; public class LibraryConfigUpdateService extends IntentService { private static final String NAME = "LibraryConfigUpdateService"; public static final String ACTION_SUCCESS = NAME + "_success"; public static final String ACTION_FAILURE = NAME + "_failure"; public static final String EXTRA_UPDATE_COUNT = "update_count"; public static final String LIBRARIES_DIR = "libraries"; public LibraryConfigUpdateService() { super(NAME); } @Override protected void onHandleIntent(Intent intent) { WebService service = WebServiceManager.getInstance(); PreferenceDataSource prefs = new PreferenceDataSource(this); File filesDir = new File(getFilesDir(), LIBRARIES_DIR); filesDir.mkdirs(); try { int count = ((OpacClient) getApplication()).getUpdateHandler().updateConfig(service, prefs, new FileOutput(filesDir), new JsonSearchFieldDataSource(this)); if (!BuildConfig.DEBUG) { ACRA.getErrorReporter().putCustomData("data_version", prefs.getLastLibraryConfigUpdate().toString()); } if (BuildConfig.DEBUG) { Log.d("LibraryConfigUpdate", "updated config for " + String.valueOf(count) + " libraries"); } Intent broadcast = new Intent(ACTION_SUCCESS).putExtra(EXTRA_UPDATE_COUNT, count); LocalBroadcastManager.getInstance(this).sendBroadcast(broadcast); ((OpacClient) getApplication()).resetCache(); } catch (IOException e) { Intent broadcast = new Intent(ACTION_FAILURE); LocalBroadcastManager.getInstance(this).sendBroadcast(broadcast); } catch (JSONException e) { Intent broadcast = new Intent(ACTION_FAILURE); LocalBroadcastManager.getInstance(this).sendBroadcast(broadcast); ErrorReporter.handleException(e); } } public static class FileOutput { private final File dir; public FileOutput(File dir) { this.dir = dir; } public void writeFile(String filename, String data) throws IOException { File file = new File(dir, filename); FileWriter writer = null; try { writer = new FileWriter(file); writer.write(data); } finally { if (writer != null) writer.close(); } } public void clearFiles() { File[] files = dir.listFiles(); for (File file : files) { file.delete(); } } } public static void clearConfigurationUpdates(Context context) { File filesDir = new File(context.getFilesDir(), LIBRARIES_DIR); filesDir.mkdirs(); File[] files = filesDir.listFiles(); for (File file : files) { file.delete(); } PreferenceDataSource prefs = new PreferenceDataSource(context); prefs.clearLastLibraryConfigUpdate(); } }