如何使用graphql-spring-boot向GraphQL Java添加插装？

Question

有人知道如何在使用graphql-spring-boot (https://github.com/graphql-java-kickstart/graphql-spring-boot)时向GraphQL执行添加指令插入吗？我知道如何使用普通的graphql-java：https://www.graphql-java.com/documentation/v13/instrumentation/实现这一点

但是，当使用graphql-spring-boot并控制执行时，我不知道该怎么做。由于缺乏文档，我简单地尝试了一下：

@Service
public class GraphQLInstrumentationProvider implements InstrumentationProvider {
    @Override
    public Instrumentation getInstrumentation() {
        return SimpleInstrumentation.INSTANCE;
    }
}

但是(不出所料)我的InstrumentationProvider bean上的getInstrumentation方法从未被调用过。感谢您的帮助。

Answer 1

回答我自己的问题。与此同时，我设法做到了这一点：

final class RequestLoggingInstrumentation extends SimpleInstrumentation {

    private static final Logger logger = LoggerFactory.getLogger(RequestLoggingInstrumentation.class);

    @Override
    public InstrumentationContext<ExecutionResult> beginExecution(InstrumentationExecutionParameters parameters) {
        long startMillis = System.currentTimeMillis();
        var executionId = parameters.getExecutionInput().getExecutionId();

        if (logger.isInfoEnabled()) {
            logger.info("GraphQL execution {} started", executionId);

            var query = parameters.getQuery();
            logger.info("[{}] query: {}", executionId, query);
            if (parameters.getVariables() != null && !parameters.getVariables().isEmpty()) {
                logger.info("[{}] variables: {}", executionId, parameters.getVariables());
            }
        }

        return new SimpleInstrumentationContext<>() {
            @Override
            public void onCompleted(ExecutionResult executionResult, Throwable t) {
                if (logger.isInfoEnabled()) {
                    long endMillis = System.currentTimeMillis();

                    if (t != null) {
                        logger.info("GraphQL execution {} failed: {}", executionId, t.getMessage(), t);
                    } else {
                        var resultMap = executionResult.toSpecification();
                        var resultJSON = ObjectMapper.pojoToJSON(resultMap).replace("\n", "\\n");
                        logger.info("[{}] completed in {}ms", executionId, endMillis - startMillis);
                        logger.info("[{}] result: {}", executionId, resultJSON);
                    }
                }
            }
        };
    }
}

@Service
class InstrumentationService {

    private final ContextFactory contextFactory;

    InstrumentationService(ContextFactory contextFactory) {
        this.contextFactory = contextFactory;
    }

    /**
     * Return all instrumentations as a bean.
     * The result will be used in class {@link com.oembedler.moon.graphql.boot.GraphQLWebAutoConfiguration}.
     */
    @Bean
    List<Instrumentation> instrumentations() {
        // Note: Due to a bug in GraphQLWebAutoConfiguration, the returned list has to be modifiable (it will be sorted)
        return new ArrayList<>(
                List.of(new RequestLoggingInstrumentation()));
    }
}

它帮助我了解了GraphQLWebAutoConfiguration类。在那里，我发现框架需要一个List<Instrumentation>类型的bean，它包含将添加到GraphQL执行中的所有工具。

Answer 2

有一种更简单的方法可以使用spring boot添加工具：

@Configuration
public class InstrumentationConfiguration {
    @Bean
    public Instrumentation someFieldCheckingInstrumentation() {
        return new FieldValidationInstrumentation(env -> {
            // ... 
        });
    }
}

Spring boot将收集所有实现Instrumentation的bean(参见GraphQLWebAutoConfiguration)。