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Moved Mono/Flux conversion to reactive module by adding a DataFetcher…
…ResultProcessor abstraction
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35 changes: 35 additions & 0 deletions
35
...main/java/com/netflix/graphql/dgs/example/reactive/datafetchers/ReactiveDataFetchers.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| /* | ||
| * Copyright 2021 Netflix, 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. | ||
| */ | ||
|
|
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| package com.netflix.graphql.dgs.example.reactive.datafetchers; | ||
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| import com.netflix.graphql.dgs.DgsComponent; | ||
| import com.netflix.graphql.dgs.DgsQuery; | ||
| import reactor.core.publisher.Flux; | ||
| import reactor.core.publisher.Mono; | ||
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| @DgsComponent | ||
| public class ReactiveDataFetchers { | ||
| @DgsQuery | ||
| public Mono<String> mono() { | ||
| return Mono.just("hello mono"); | ||
| } | ||
|
|
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| @DgsQuery | ||
| public Flux<Integer> flux() { | ||
| return Flux.just(1, 2, 3); | ||
| } | ||
| } |
4 changes: 4 additions & 0 deletions
4
graphql-dgs-example-java-webflux/src/main/resources/schema/extraschema.graphqls
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| extend type Query { | ||
| mono: String | ||
| flux: [Int] | ||
| } |
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50 changes: 50 additions & 0 deletions
50
...in/kotlin/com/netflix/graphql/dgs/reactive/internal/ReactiveDataFetcherResultProcessor.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| /* | ||
| * Copyright 2021 Netflix, 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. | ||
| */ | ||
|
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| package com.netflix.graphql.dgs.reactive.internal | ||
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| import com.netflix.graphql.dgs.internal.DataFetcherResultProcessor | ||
| import reactor.core.publisher.Flux | ||
| import reactor.core.publisher.Mono | ||
| import java.lang.IllegalArgumentException | ||
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| class MonoDataFetcherResultProcessor : DataFetcherResultProcessor { | ||
| override fun supportsType(originalResult: Any): Boolean { | ||
| return originalResult is Mono<*> | ||
| } | ||
|
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| override fun process(originalResult: Any): Any { | ||
| if (originalResult is Mono<*>) { | ||
| return originalResult.toFuture() | ||
| } else { | ||
| throw IllegalArgumentException("Instance passed to ${this::class.qualifiedName} was not a Mono<*>. It was a ${originalResult::class.qualifiedName} instead") | ||
| } | ||
| } | ||
| } | ||
|
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| class FluxDataFetcherResultProcessor : DataFetcherResultProcessor { | ||
| override fun supportsType(originalResult: Any): Boolean { | ||
| return originalResult is Flux<*> | ||
| } | ||
|
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| override fun process(originalResult: Any): Any { | ||
| if (originalResult is Flux<*>) { | ||
| return originalResult.collectList().toFuture() | ||
| } else { | ||
| throw IllegalArgumentException("Instance passed to ${this::class.qualifiedName} was not a Flux<*>. It was a ${originalResult::class.qualifiedName} instead") | ||
| } | ||
| } | ||
| } |
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