/
DefaultDataFetcherExceptionHandler.kt
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/
DefaultDataFetcherExceptionHandler.kt
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/*
* 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.
*/
package com.netflix.graphql.dgs.exceptions
import com.netflix.graphql.types.errors.TypedGraphQLError
import graphql.execution.DataFetcherExceptionHandler
import graphql.execution.DataFetcherExceptionHandlerParameters
import graphql.execution.DataFetcherExceptionHandlerResult
import org.slf4j.Logger
import org.slf4j.LoggerFactory
import org.springframework.util.ClassUtils
/**
* Default DataFetcherExceptionHandler used by the framework, can be replaced with a custom implementation.
* The default implementation uses the Common Errors library to return GraphQL errors.
*/
class DefaultDataFetcherExceptionHandler : DataFetcherExceptionHandler {
override fun onException(handlerParameters: DataFetcherExceptionHandlerParameters?): DataFetcherExceptionHandlerResult {
val exception = handlerParameters!!.exception
logger.error("Exception while executing data fetcher for ${handlerParameters.path}: ${exception.message}", exception)
val graphqlError = if (springSecurityAvailable && isSpringSecurityAccessException(exception)) {
TypedGraphQLError.newPermissionDeniedBuilder()
.message("%s: %s", exception::class.java.name, exception.message)
.path(handlerParameters.path).build()
} else if (exception is DgsEntityNotFoundException) {
TypedGraphQLError.newNotFoundBuilder()
.message("%s: %s", exception::class.java.name, exception.message)
.path(handlerParameters.path).build()
} else if (exception is DgsBadRequestException) {
TypedGraphQLError.newBadRequestBuilder()
.message("%s: %s", exception::class.java.name, exception.message)
.path(handlerParameters.path).build()
} else {
TypedGraphQLError.newInternalErrorBuilder()
.message("%s: %s", exception::class.java.name, exception.message)
.path(handlerParameters.path).build()
}
return DataFetcherExceptionHandlerResult.newResult()
.error(graphqlError)
.build()
}
companion object {
private val logger: Logger = LoggerFactory.getLogger(DefaultDataFetcherExceptionHandler::class.java)
private val springSecurityAvailable: Boolean by lazy {
ClassUtils.isPresent(
"org.springframework.security.access.AccessDeniedException",
DefaultDataFetcherExceptionHandler::class.java.classLoader
)
}
private fun isSpringSecurityAccessException(exception: Throwable?): Boolean {
try {
return exception is org.springframework.security.access.AccessDeniedException
} catch (e: Throwable) {
logger.trace("Unable to verify if {} is a Spring Security's AccessDeniedException.", exception, e)
}
return false
}
}
}