Java tutorial
/* * Copyright 2010-2019 the original author or authors. * * 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 * * https://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 org.springframework.data.mongodb.core; import org.springframework.dao.DataAccessException; import org.springframework.lang.Nullable; import com.mongodb.MongoException; import com.mongodb.client.MongoDatabase; /** * Callback interface for executing actions against a {@link MongoDatabase}. * * @author Mark Pollak * @author Graeme Rocher * @author Thomas Risberg * @author Oliver Gierke * @author John Brisbin * @author Christoph Strobl */ public interface DbCallback<T> { /** * @param db must not be {@literal null}. * @return can be {@literal null}. * @throws MongoException * @throws DataAccessException */ @Nullable T doInDB(MongoDatabase db) throws MongoException, DataAccessException; }