fixing clear database functionality

+ some ex.printStackTrace warnings

Author: SelvinPL

auto-content-provider/src/main/java/pl/selvin/android/autocontentprovider/content/AutoContentProvider.java

@@ -39,6 +39,7 @@ public abstract class AutoContentProvider extends ContentProvider {
 	protected final ContentHelper contentHelper;
 	protected final Class<?> clazz = getClass();
 	protected final Logger logger;
+	protected final Object getDatabaseLock = new Object();
 	private final SupportSQLiteOpenHelper.Callback defaultCallback;
 	private final SupportSQLiteOpenHelperFactoryProvider supportSQLiteOpenHelperFactoryProvider;
 	private SupportSQLiteOpenHelper mDB;
@@ -72,11 +73,23 @@ public boolean onCreate() {
 	}
 
 	final public SupportSQLiteDatabase getReadableDatabase() {
-		return mDB.getReadableDatabase();
+		synchronized (getDatabaseLock) {
+			return mDB.getReadableDatabase();
+		}
 	}
 
 	final public SupportSQLiteDatabase getWritableDatabase() {
-		return mDB.getWritableDatabase();
+		synchronized (getDatabaseLock) {
+			return mDB.getWritableDatabase();
+		}
+	}
+
+	final protected void clearDatabase() {
+		synchronized (getDatabaseLock) {
+			mDB.getWritableDatabase().setVersion(1);
+			mDB.close();
+			requireContextEx().getContentResolver().notifyChange(contentHelper.CONTENT_URI, null, false);
+		}
 	}
 
 	@Nullable
@@ -156,7 +169,7 @@ public int delete(@NonNull Uri uri, String selection, String[] selectionArgs) {
 		if (code != UriMatcher.NO_MATCH) {
 			if (code == ContentHelper.uriClearCode) {
 				logger.LogD(clazz, "delete uriClearCode");
-				getHelperCallback().onUpgrade(getWritableDatabase(), 1, contentHelper.DATABASE_VERSION);
+				clearDatabase();
 				return 0;
 			}
 			boolean syncToNetwork = ContentHelper.checkSyncToNetwork(uri);
@@ -209,7 +222,8 @@ public int delete(@NonNull Uri uri, String selection, String[] selectionArgs) {
 									cascadeResults += delete(deleteUri, deleteWhere, whereArgs);
 								}
 							} catch (Exception ex) {
-								ex.printStackTrace();
+								logger.LogD(clazz, "*onCreateDataBase*: " + ex, ex);
+								throw new RuntimeException(ex);
 							}
 						}
 					} finally {

sync-framework/src/main/java/pl/selvin/android/syncframework/content/BaseContentProvider.java

@@ -103,7 +103,7 @@ public Bundle call(@NonNull String method, String arg, Bundle syncParams) {
 				inout.numIoExceptions++;
 				syncParams.putParcelable(SYNC_PARAM_IN_SYNC_STATS, inout);
 			}
-			ex.printStackTrace();
+			logger.LogD(clazz, "*call", ex);
 		}
 		return syncParams;
 	}
@@ -317,9 +317,7 @@ public Stats sync(String service, String scope, String params, Stats stats) {
 						}
 						jp.close();
 						if (resolveConflicts)
-							logger.LogE(clazz, "*Sync* has resolve conflicts: " + resolveConflicts);
-						else
-							logger.LogD(clazz, "*Sync* has resolve conflicts: " + resolveConflicts);
+							logger.LogE(clazz, "*Sync* has resolve conflicts !!!");
 					} else {
 						boolean fixed = false;
 						final String error = result.error;