DeleteObjectUtil.java example

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akvo-flow-master
/*
 *  Copyright (C) 2010-2012 Stichting Akvo (Akvo Foundation)
 *
 *  This file is part of Akvo FLOW.
 *
 *  Akvo FLOW is free software: you can redistribute it and modify it under the terms of
 *  the GNU Affero General Public License (AGPL) as published by the Free Software Foundation,
 *  either version 3 of the License or any later version.
 *
 *  Akvo FLOW is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *  See the GNU Affero General Public License included below for more details.
 *
 *  The full license text can also be seen at <http://www.gnu.org/licenses/agpl.html>.
 */

package org.waterforpeople.mapping.app.web.test;

import java.util.ArrayList;

import com.google.appengine.api.datastore.DatastoreService;
import com.google.appengine.api.datastore.DatastoreServiceFactory;
import com.google.appengine.api.datastore.Entity;
import com.google.appengine.api.datastore.FetchOptions;
import com.google.appengine.api.datastore.Key;
import com.google.appengine.api.datastore.Query;

public class DeleteObjectUtil {
    public void deleteAllObjects(String kind) {
        final DatastoreService dss = DatastoreServiceFactory
                .getDatastoreService();

        final Query query = new Query(kind);

        query.setKeysOnly();

        final ArrayList<Key> keys = new ArrayList<Key>();

        for (final Entity entity : dss.prepare(query).asIterable(
                FetchOptions.Builder.withLimit(100000))) {
            keys.add(entity.getKey());
        }
        dss.delete(keys);
    }
}