spring-graphql DefaultTransportGraphQlClientBuilder 源码

  • 2022-08-16
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spring-graphql DefaultTransportGraphQlClientBuilder 代码

文件路径:/spring-graphql/src/main/java/org/springframework/graphql/client/DefaultTransportGraphQlClientBuilder.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.function.Consumer;

import org.springframework.util.Assert;


/**
 * Default {@link GraphQlClient.Builder} with a given, externally, prepared transport.
 *
 * @author Rossen Stoyanchev
 * @since 1.0.0
 */
final class DefaultTransportGraphQlClientBuilder
		extends AbstractGraphQlClientBuilder<DefaultTransportGraphQlClientBuilder> {

	private final GraphQlTransport transport;


	DefaultTransportGraphQlClientBuilder(GraphQlTransport transport) {
		Assert.notNull(transport, "GraphQlTransport is required");
		this.transport = transport;
	}


	@Override
	public GraphQlClient build() {
		GraphQlClient client = buildGraphQlClient(this.transport);
		return new DefaultTransportGraphQlClient(client, this.transport, getBuilderInitializer());
	}


	/**
	 * Default GraphQL client with a given transport.
	 */
	private static class DefaultTransportGraphQlClient extends AbstractDelegatingGraphQlClient {

		private final GraphQlTransport transport;

		private final Consumer<AbstractGraphQlClientBuilder<?>> builderInitializer;


		DefaultTransportGraphQlClient(
				GraphQlClient graphQlClient, GraphQlTransport transport,
				Consumer<AbstractGraphQlClientBuilder<?>> builderInitializer) {

			super(graphQlClient);
			Assert.notNull(transport, "GraphQlTransport is required");
			Assert.notNull(builderInitializer, "'builderInitializer' is required");
			this.transport = transport;
			this.builderInitializer = builderInitializer;
		}


		@Override
		public DefaultTransportGraphQlClientBuilder mutate() {
			DefaultTransportGraphQlClientBuilder builder = new DefaultTransportGraphQlClientBuilder(this.transport);
			this.builderInitializer.accept(builder);
			return builder;
		}

	}

}

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