com.datastax.dse.driver.api.mapper.reactive.MappedReactiveResultSet Maven / Gradle / Ivy
/*
* Copyright DataStax, Inc.
*
* 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
*
* http://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 com.datastax.dse.driver.api.mapper.reactive;
import com.datastax.dse.driver.api.core.cql.reactive.ReactiveQueryMetadata;
import com.datastax.dse.driver.api.core.cql.reactive.ReactiveResultSet;
import org.reactivestreams.Publisher;
/**
* A {@link Publisher} of mapped entities returned by DAO methods. In other words, this interface is
* the equivalent of {@link ReactiveResultSet} for mapped entities.
*
* By default, all implementations returned by the driver are cold, unicast, single-subscriber
* only publishers. In other words, they do not support multiple subscriptions; consider
* caching the results produced by such publishers if you need to consume them by more than one
* downstream subscriber.
*
*
Also, note that mapped reactive result sets may emit items to their subscribers on an internal
* driver IO thread. Subscriber implementors are encouraged to abide by Reactive Streams
* Specification rule 2.2 and avoid performing heavy computations or blocking calls inside
* {@link org.reactivestreams.Subscriber#onNext(Object) onNext} calls, as doing so could slow down
* the driver and impact performance. Instead, they should asynchronously dispatch received signals
* to their processing logic.
*
*
This type is located in a {@code dse} package for historical reasons; reactive result sets
* work with both Cassandra and DSE.
*
* @see ReactiveResultSet
*/
public interface MappedReactiveResultSet
extends Publisher, ReactiveQueryMetadata {}