main.com.netflix.graphql.dgs.internal.DgsWrapWithContextDataLoaderCustomizer.kt Maven / Gradle / Ivy

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/*
 * Copyright 2024 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.
 */

package com.netflix.graphql.dgs.internal

import com.netflix.graphql.dgs.DgsDataLoaderCustomizer
import com.netflix.graphql.dgs.DgsDataLoaderRegistryConsumer
import org.dataloader.BatchLoader
import org.dataloader.BatchLoaderEnvironment
import org.dataloader.BatchLoaderWithContext
import org.dataloader.DataLoaderRegistry
import org.dataloader.MappedBatchLoader
import org.dataloader.MappedBatchLoaderWithContext
import java.util.concurrent.CompletionStage

class DgsWrapWithContextDataLoaderCustomizer : DgsDataLoaderCustomizer {
    override fun provide(
        original: BatchLoader<*, *>,
        name: String,
    ): Any = BatchLoaderWithContextWrapper(original)

    override fun provide(
        original: BatchLoaderWithContext<*, *>,
        name: String,
    ): Any = original

    override fun provide(
        original: MappedBatchLoader<*, *>,
        name: String,
    ): Any = MappedBatchLoaderWithContextWrapper(original)

    override fun provide(
        original: MappedBatchLoaderWithContext<*, *>,
        name: String,
    ): Any = original
}

internal class BatchLoaderWithContextWrapper(
    private val original: BatchLoader,
) : BatchLoaderWithContext,
    DgsDataLoaderRegistryConsumer {
    override fun load(
        keys: List,
        environment: BatchLoaderEnvironment,
    ): CompletionStage> = original.load(keys)

    override fun setDataLoaderRegistry(dataLoaderRegistry: DataLoaderRegistry?) {
        if (original is DgsDataLoaderRegistryConsumer) {
            (original as DgsDataLoaderRegistryConsumer).setDataLoaderRegistry(dataLoaderRegistry)
        }
    }
}

internal class MappedBatchLoaderWithContextWrapper(
    private val original: MappedBatchLoader,
) : MappedBatchLoaderWithContext,
    DgsDataLoaderRegistryConsumer {
    override fun load(
        keys: Set,
        environment: BatchLoaderEnvironment,
    ): CompletionStage> = original.load(keys)

    override fun setDataLoaderRegistry(dataLoaderRegistry: DataLoaderRegistry?) {
        if (original is DgsDataLoaderRegistryConsumer) {
            (original as DgsDataLoaderRegistryConsumer).setDataLoaderRegistry(dataLoaderRegistry)
        }
    }
}