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HelloDataFetcher.java
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/
HelloDataFetcher.java
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/*
* Copyright 2020 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.example.datafetcher;
import com.netflix.graphql.dgs.DgsComponent;
import com.netflix.graphql.dgs.DgsData;
import com.netflix.graphql.dgs.DgsEnableDataFetcherInstrumentation;
import com.netflix.graphql.dgs.InputArgument;
import com.netflix.graphql.dgs.context.DgsContext;
import com.netflix.graphql.dgs.example.context.MyContext;
import graphql.GraphQLException;
import graphql.schema.DataFetchingEnvironment;
import org.dataloader.DataLoader;
import java.util.concurrent.CompletableFuture;
@DgsComponent
public class HelloDataFetcher {
@DgsData(parentType = "Query", field = "hello")
@DgsEnableDataFetcherInstrumentation(false)
public String hello(@InputArgument("name") String name) {
if(name == null) {
name = "Stranger";
}
return "hello, " + name + "!";
}
@DgsData(parentType = "Query", field = "messageFromBatchLoader")
public CompletableFuture<String> getMessage(DataFetchingEnvironment env) {
DataLoader<String, String> dataLoader = env.getDataLoader("messages");
return dataLoader.load("a");
}
@DgsData(parentType = "Query", field = "withContext")
public String withContext(DataFetchingEnvironment dfe) {
MyContext customContext = DgsContext.getCustomContext(dfe);
return customContext.getCustomState();
}
@DgsData(parentType = "Query", field = "withDataLoaderContext")
@DgsEnableDataFetcherInstrumentation
public CompletableFuture<String> withDataLoaderContext(DataFetchingEnvironment dfe) {
DataLoader<String, String> exampleLoaderWithContext = dfe.getDataLoader("exampleLoaderWithContext");
return exampleLoaderWithContext.load("A");
}
@DgsData(parentType = "Query", field = "withGraphqlException")
public String withGraphqlException() {
throw new GraphQLException("that's not going to work!");
}
@DgsData(parentType = "Query", field = "withRuntimeException")
public String withRuntimeException() {
throw new RuntimeException("That's broken!");
}
}