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Add RSocketGraphQlClient and GraphQlRSocketHandler
See gh-339
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166
...graphql/src/main/java/org/springframework/graphql/client/DefaultRSocketGraphQlClient.java
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| * 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. | ||
| */ | ||
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| package org.springframework.graphql.client; | ||
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| import java.net.URI; | ||
| import java.util.function.Consumer; | ||
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| import io.rsocket.transport.ClientTransport; | ||
| import io.rsocket.transport.netty.client.TcpClientTransport; | ||
| import io.rsocket.transport.netty.client.WebsocketClientTransport; | ||
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| import org.springframework.lang.Nullable; | ||
| import org.springframework.messaging.rsocket.RSocketRequester; | ||
| import org.springframework.messaging.rsocket.RSocketStrategies; | ||
| import org.springframework.util.Assert; | ||
| import org.springframework.util.MimeType; | ||
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| /** | ||
| * Default {@link RSocketGraphQlClient} implementation that builds the underlying | ||
| * {@code RSocketGraphQlTransport} to use. | ||
| * | ||
| * @author Rossen Stoyanchev | ||
| * @since 1.0.0 | ||
| */ | ||
| final class DefaultRSocketGraphQlClient extends AbstractDelegatingGraphQlClient implements RSocketGraphQlClient { | ||
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| private final RSocketRequester.Builder requesterBuilder; | ||
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| private final ClientTransport clientTransport; | ||
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| private final String route; | ||
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| private final Consumer<AbstractGraphQlClientBuilder<?>> builderInitializer; | ||
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| DefaultRSocketGraphQlClient( | ||
| GraphQlClient graphQlClient, RSocketRequester.Builder requesterBuilder, | ||
| ClientTransport clientTransport, String route, | ||
| Consumer<AbstractGraphQlClientBuilder<?>> builderInitializer) { | ||
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| super(graphQlClient); | ||
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| this.requesterBuilder = requesterBuilder; | ||
| this.clientTransport = clientTransport; | ||
| this.route = route; | ||
| this.builderInitializer = builderInitializer; | ||
| } | ||
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| @Override | ||
| public RSocketGraphQlClient.Builder<?> mutate() { | ||
| Builder builder = new Builder(this.requesterBuilder); | ||
| builder.clientTransport(this.clientTransport); | ||
| builder.route(this.route); | ||
| this.builderInitializer.accept(builder); | ||
| return builder; | ||
| } | ||
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| /** | ||
| * Default {@link RSocketGraphQlClient.Builder} implementation. | ||
| */ | ||
| static final class Builder extends AbstractGraphQlClientBuilder<Builder> implements RSocketGraphQlClient.Builder<Builder> { | ||
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| private final RSocketRequester.Builder requesterBuilder; | ||
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| @Nullable | ||
| private ClientTransport clientTransport; | ||
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| private String route; | ||
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| Builder() { | ||
| this(initRSocketRequestBuilder()); | ||
| } | ||
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| Builder(RSocketRequester.Builder requesterBuilder) { | ||
| Assert.notNull(requesterBuilder, "RSocketRequester.Builder is required"); | ||
| this.requesterBuilder = requesterBuilder; | ||
| this.route = "graphql"; | ||
| } | ||
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| private static RSocketRequester.Builder initRSocketRequestBuilder() { | ||
| MimeType mimeType = MimeType.valueOf("application/graphql+json"); | ||
| RSocketRequester.Builder requesterBuilder = RSocketRequester.builder().dataMimeType(mimeType); | ||
| if (jackson2Present) { | ||
| requesterBuilder.rsocketStrategies( | ||
| RSocketStrategies.builder() | ||
| .encoder(DefaultJackson2Codecs.encoder()) | ||
| .decoder(DefaultJackson2Codecs.decoder()) | ||
| .build()); | ||
| } | ||
| return requesterBuilder; | ||
| } | ||
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| @Override | ||
| public Builder tcp(String host, int port) { | ||
| this.clientTransport = TcpClientTransport.create(host, port); | ||
| return this; | ||
| } | ||
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| @Override | ||
| public Builder webSocket(URI uri) { | ||
| this.clientTransport = WebsocketClientTransport.create(uri); | ||
| return this; | ||
| } | ||
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| @Override | ||
| public Builder clientTransport(ClientTransport clientTransport) { | ||
| this.clientTransport = clientTransport; | ||
| return this; | ||
| } | ||
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| @Override | ||
| public Builder dataMimeType(MimeType dataMimeType) { | ||
| this.requesterBuilder.dataMimeType(dataMimeType); | ||
| return this; | ||
| } | ||
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| @Override | ||
| public Builder route(String route) { | ||
| Assert.notNull(route, "'route' is required"); | ||
| this.route = route; | ||
| return this; | ||
| } | ||
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| @Override | ||
| public Builder rsocketRequester(Consumer<RSocketRequester.Builder> requesterConsumer) { | ||
| requesterConsumer.accept(this.requesterBuilder); | ||
| return this; | ||
| } | ||
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| @Override | ||
| public RSocketGraphQlClient build() { | ||
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| Assert.state(this.clientTransport != null, "Neither WebSocket nor TCP networking configured"); | ||
| RSocketRequester requester = this.requesterBuilder.transport(this.clientTransport); | ||
| RSocketGraphQlTransport graphQlTransport = new RSocketGraphQlTransport(this.route, requester); | ||
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| // Pass the codecs to the parent for response decoding | ||
| this.requesterBuilder.rsocketStrategies(builder -> { | ||
| builder.decoders(decoders -> setJsonDecoder(CodecDelegate.findJsonDecoder(decoders))); | ||
| builder.encoders(encoders -> setJsonEncoder(CodecDelegate.findJsonEncoder(encoders))); | ||
| }); | ||
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| return new DefaultRSocketGraphQlClient( | ||
| super.buildGraphQlClient(graphQlTransport), | ||
| this.requesterBuilder, this.clientTransport, this.route, getBuilderInitializer()); | ||
| } | ||
| } | ||
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| } |
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