spring-graphql GraphQlTransport 源码
spring-graphql GraphQlTransport 代码
文件路径：/spring-graphql/src/main/java/org/springframework/graphql/client/GraphQlTransport.java
/*
* Copyright 2002-2022 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.graphql.client;
import java.util.Map;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import org.springframework.graphql.GraphQlRequest;
import org.springframework.graphql.GraphQlResponse;
/**
* Contract for executing GraphQL requests over some transport.
*
* @author Rossen Stoyanchev
* @since 1.0.0
*/
public interface GraphQlTransport {
/**
* Execute a request with a single response such as a "query" or "mutation".
* @param request the request to execute
* @return a {@code Mono} with the {@code GraphQlResponse} for the response.
* The {@code Mono} may end wth an error due to transport or other issues
* such as failures to encode the request or decode the response.
*/
Mono<GraphQlResponse> execute(GraphQlRequest request);
/**
* Execute a "subscription" request with a stream of responses.
* @param request the request to execute
* @return a {@code Flux} of {@code GraphQlResponse} responses.
* The {@code Flux} may terminate as follows:
* <ul>
* <li>Completes if the subscription completes before the connection is closed.
* <li>{@link SubscriptionErrorException} if the subscription ends with an error.
* <li>{@link WebSocketDisconnectedException} if the connection is closed or
* lost before the stream terminates.
* <li>Exception for connection and GraphQL session initialization issues.
* </ul>
* <p>The {@code Flux} may be cancelled to notify the server to end the
* subscription stream.
*/
Flux<GraphQlResponse> executeSubscription(GraphQlRequest request);
/**
* Factory method to create {@link GraphQlResponse} from a GraphQL response
* map for use in transport implementations.
*/
static GraphQlResponse createResponse(Map<String, Object> responseMap) {
return new ResponseMapGraphQlResponse(responseMap);
}
}
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