Commit after every 100 resource downloads to avoid TransactionTooLargeException

src/at/bitfire/davdroid/resource/LocalCollection.java

@@ -22,9 +22,10 @@ import android.database.Cursor;
 import android.net.Uri;
 import android.os.RemoteException;
 import android.provider.CalendarContract;
+import android.util.Log;
 
 public abstract class LocalCollection<ResourceType extends Resource> {
-	//private static final String TAG = "davdroid.LocalCollection";
+	private static final String TAG = "davdroid.LocalCollection";
 	
 	protected Account account;
 	protected ContentProviderClient providerClient;
@@ -126,9 +127,8 @@ public abstract class LocalCollection<ResourceType extends Resource> {
 	
 	public void updateByRemoteName(ResourceType remoteResource) throws RemoteException, ValidationException {
 		ResourceType localResource = findByRemoteName(remoteResource.getName());
-		
 		remoteResource.validate();
-
+		
 		pendingOperations.add(
 				buildEntry(ContentProviderOperation.newUpdate(ContentUris.withAppendedId(entriesURI(), localResource.getLocalID())), remoteResource)
 				.withValue(entryColumnETag(), remoteResource.getETag())
@@ -155,6 +155,8 @@ public abstract class LocalCollection<ResourceType extends Resource> {
 	}
 
 	public void commit() throws RemoteException, OperationApplicationException {
+		Log.i(TAG, "Committing " + pendingOperations.size() + " operations");
+		
 		if (!pendingOperations.isEmpty())
 			providerClient.applyBatch(pendingOperations);
 		

src/at/bitfire/davdroid/syncadapter/SyncManager.java

@@ -11,7 +11,6 @@ import java.io.IOException;
 import java.util.HashSet;
 import java.util.Set;
 
-import net.fortuna.ical4j.data.ParserException;
 import net.fortuna.ical4j.model.ValidationException;
 
 import org.apache.http.HttpException;
@@ -22,14 +21,14 @@ import android.content.OperationApplicationException;
 import android.content.SyncResult;
 import android.os.RemoteException;
 import android.util.Log;
-import at.bitfire.davdroid.resource.IncapableResourceException;
 import at.bitfire.davdroid.resource.LocalCollection;
 import at.bitfire.davdroid.resource.RemoteCollection;
 import at.bitfire.davdroid.resource.Resource;
 import at.bitfire.davdroid.webdav.PreconditionFailedException;
 
 public class SyncManager {
-	private static String TAG = "davdroid.SyncManager";
+	private static final String TAG = "davdroid.SyncManager";
+	private static final int MAX_UPDATES_BEFORE_COMMIT = 100;
 	
 	protected Account account;
 	protected AccountManager accountManager;
@@ -134,7 +133,7 @@ public class SyncManager {
 		
 		// PHASE 3: DOWNLOAD NEW/REMOTELY-CHANGED RESOURCES
 		Log.i(TAG, "Adding " + resourcesToAdd.size() + " remote resource(s)");
-		if (!resourcesToAdd.isEmpty())
+		if (!resourcesToAdd.isEmpty()) {
 			for (Resource res : dav.multiGet(resourcesToAdd.toArray(new Resource[0]))) {
 				Log.i(TAG, "Adding " + res.getName());
 				try {
@@ -142,20 +141,25 @@ public class SyncManager {
 				} catch (ValidationException ex) {
 					Log.w(TAG, "Ignoring invalid remote resource: " + res.getName(), ex);
 				}
-				syncResult.stats.numInserts++;
+				
+				if (++syncResult.stats.numInserts % MAX_UPDATES_BEFORE_COMMIT == 0)	// avoid TransactionTooLargeException
+					local.commit();
 			}
-		local.commit();
+			local.commit();
+		}
 		
 		Log.i(TAG, "Updating " + resourcesToUpdate.size() + " remote resource(s)");
 		if (!resourcesToUpdate.isEmpty())
 			for (Resource res : dav.multiGet(resourcesToUpdate.toArray(new Resource[0]))) {
+				Log.i(TAG, "Updating " + res.getName());
 				try {
 					local.updateByRemoteName(res);
 				} catch (ValidationException ex) {
 					Log.e(TAG, "Ignoring invalid remote resource: " + res.getName(), ex);
 				}
-				Log.i(TAG, "Updating " + res.getName());
-				syncResult.stats.numInserts++;
+				
+				if (++syncResult.stats.numUpdates % MAX_UPDATES_BEFORE_COMMIT == 0)	// avoid TransactionTooLargeException
+					local.commit();
 			}
 		local.commit();