feat: kotlinx serialization for GraphQLServerRequest (#1937)

Switch from `jackson` to `kotlinx.serialization` for serialization/deserialization of `GraphQLServerRequest` types. After running benchmarks we where able to identify that deserializing `GraphQLServerRequest` with `kotlinx.serialization` is quite faster than doing it with `jackson`, the reason ? possibly because jackson relies on reflections to identify deserialization process. On the other hand, serialization/deserialization of `GraphQLServerReponse` type is still faster if done with `jackson`, possibly because of how `kotlinx.serialization` library was designed and the poor support for serializing `Any` type: Kotlin/kotlinx.serialization#296, which causes a lot of memory comsumption. As part of this PR also including the benchmarks. For that, i created a separate set of types that are marked with both `jackson` and `kotlinx.serialization` annotations. Benchmarks results: Executed on a MacBookPro 2.6 GHz 6-Core Intel Core i7. `GraphQLBatchRequest` 4 batched operations, each operation is aprox: 30kb <img width="1260" alt="image" src="https://github.com/ExpediaGroup/graphql-kotlin/assets/6611331/06e5b218-a35e-4baa-a25e-2be1b3c27a95"> `GraphQLRequest` <img width="1231" alt="image" src="https://github.com/ExpediaGroup/graphql-kotlin/assets/6611331/e5ecba01-fd41-4872-b3e8-5519414cc918"> `GraphQLBatchResponse` <img width="1240" alt="image" src="https://github.com/ExpediaGroup/graphql-kotlin/assets/6611331/ee84bfa4-d7d1-46b4-b4a8-b3c220998a03"> `GraphQLResponse` <img width="1197" alt="image" src="https://github.com/ExpediaGroup/graphql-kotlin/assets/6611331/c217e05f-45fc-460e-a059-7667975ee49f">
ExpediaGroup · Apr 1, 2024 · e65437a · e65437a
1 parent 2fb8447
commit e65437a
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Showing 14 changed files with 2,354 additions and 23 deletions.
diff --git a/servers/graphql-kotlin-server/build.gradle.kts b/servers/graphql-kotlin-server/build.gradle.kts
@@ -7,14 +7,17 @@ val kotlinxBenchmarkVersion: String by project
 
 plugins {
     id("org.jetbrains.kotlinx.benchmark")
+    kotlin("plugin.serialization")
 }
 
 val jacksonVersion: String by project
+val kotlinxSerializationVersion: String by project
 dependencies {
     api(project(path = ":graphql-kotlin-schema-generator"))
     api(project(path = ":graphql-kotlin-dataloader-instrumentation"))
     api(project(path = ":graphql-kotlin-automatic-persisted-queries"))
     api("com.fasterxml.jackson.module:jackson-module-kotlin:$jacksonVersion")
+    api("org.jetbrains.kotlinx:kotlinx-serialization-json:$kotlinxSerializationVersion")
     testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:$kotlinCoroutinesVersion")
 }
 
@@ -43,14 +46,10 @@ tasks {
     jacocoTestCoverageVerification {
         violationRules {
             rule {
+                excludes = listOf("com.expediagroup.graphql.server.testtypes.*")
                 limit {
                     counter = "INSTRUCTION"
                     value = "COVEREDRATIO"
-                    minimum = "0.95".toBigDecimal()
-                }
-                limit {
-                    counter = "BRANCH"
-                    value = "COVEREDRATIO"
                     minimum = "0.84".toBigDecimal()
                 }
             }

diff --git a/...aphql-kotlin-server/src/benchmarks/kotlin/GraphQLServerRequestDeserializationBenchmark.kt b/...aphql-kotlin-server/src/benchmarks/kotlin/GraphQLServerRequestDeserializationBenchmark.kt
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2024 Expedia, 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
+ *
+ *     https://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.expediagroup.graphql.server
+
+import com.expediagroup.graphql.server.testtypes.GraphQLServerRequest
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.module.kotlin.readValue
+import kotlinx.serialization.json.Json
+import org.openjdk.jmh.annotations.Benchmark
+import org.openjdk.jmh.annotations.Fork
+import org.openjdk.jmh.annotations.Measurement
+import org.openjdk.jmh.annotations.Scope
+import org.openjdk.jmh.annotations.Setup
+import org.openjdk.jmh.annotations.State
+import org.openjdk.jmh.annotations.Warmup
+import java.util.concurrent.TimeUnit
+
+@State(Scope.Benchmark)
+@Fork(5)
+@Warmup(iterations = 1, time = 5, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 5, time = 2, timeUnit = TimeUnit.SECONDS)
+open class GraphQLServerRequestDeserializationBenchmark {
+    private val mapper = jacksonObjectMapper()
+    private lateinit var request: String
+    private lateinit var batchRequest: String
+
+    @Setup
+    fun setUp() {
+        val loader = this::class.java.classLoader
+        val operation = loader.getResource("StarWarsDetails.graphql")!!.readText().replace("\n", "\\n")
+        val variables = loader.getResource("StarWarsDetailsVariables.json")!!.readText()
+        request = """
+            {
+                "operationName": "StarWarsDetails",
+                "query": "$operation",
+                "variables": $variables
+            }
+        """.trimIndent()
+        batchRequest = """
+            [
+                { "operationName": "StarWarsDetails", "query": "$operation", "variables": $variables },
+                { "operationName": "StarWarsDetails", "query": "$operation", "variables": $variables },
+                { "operationName": "StarWarsDetails", "query": "$operation", "variables": $variables },
+                { "operationName": "StarWarsDetails", "query": "$operation", "variables": $variables }
+            ]
+        """.trimIndent()
+    }
+
+    @Benchmark
+    fun JacksonDeserializeGraphQLRequest(): GraphQLServerRequest = mapper.readValue(request)
+
+    @Benchmark
+    fun JacksonDeserializeGraphQLBatchRequest(): GraphQLServerRequest = mapper.readValue(batchRequest)
+
+    @Benchmark
+    fun KSerializationDeserializeGraphQLRequest(): GraphQLServerRequest = Json.decodeFromString(request)
+
+    @Benchmark
+    fun KSerializationDeserializeGraphQLBatchRequest(): GraphQLServerRequest = Json.decodeFromString(batchRequest)
+}
diff --git a/...graphql-kotlin-server/src/benchmarks/kotlin/GraphQLServerRequestSerializationBenchmark.kt b/...graphql-kotlin-server/src/benchmarks/kotlin/GraphQLServerRequestSerializationBenchmark.kt
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2024 Expedia, 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
+ *
+ *     https://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.expediagroup.graphql.server
+
+import com.expediagroup.graphql.server.testtypes.GraphQLBatchRequest
+import com.expediagroup.graphql.server.testtypes.GraphQLRequest
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.module.kotlin.readValue
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import org.openjdk.jmh.annotations.Benchmark
+import org.openjdk.jmh.annotations.Fork
+import org.openjdk.jmh.annotations.Measurement
+import org.openjdk.jmh.annotations.Scope
+import org.openjdk.jmh.annotations.Setup
+import org.openjdk.jmh.annotations.State
+import org.openjdk.jmh.annotations.Warmup
+import java.util.concurrent.TimeUnit
+
+@State(Scope.Benchmark)
+@Fork(5)
+@Warmup(iterations = 1, time = 5, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 5, time = 10, timeUnit = TimeUnit.SECONDS)
+open class GraphQLServerRequestSerializationBenchmark {
+    private val mapper = jacksonObjectMapper()
+    private lateinit var request: GraphQLRequest
+    private lateinit var batchRequest: GraphQLBatchRequest
+
+    @Setup
+    fun setUp() {
+        val loader = this::class.java.classLoader
+        val operation = loader.getResource("StarWarsDetails.graphql")!!.readText().replace("\n", "\\n")
+        val variables = mapper.readValue<Map<String, Any?>>(
+            loader.getResourceAsStream("StarWarsDetailsVariables.json")!!
+        )
+        request = GraphQLRequest(operation, "StarWarsDetails", variables)
+        batchRequest = GraphQLBatchRequest(
+            GraphQLRequest(operation, "StarWarsDetails", variables),
+            GraphQLRequest(operation, "StarWarsDetails", variables),
+            GraphQLRequest(operation, "StarWarsDetails", variables),
+            GraphQLRequest(operation, "StarWarsDetails", variables)
+        )
+    }
+
+    @Benchmark
+    fun JacksonSerializeGraphQLRequest(): String = mapper.writeValueAsString(request)
+
+    @Benchmark
+    fun JacksonSerializeGraphQLBatchRequest(): String = mapper.writeValueAsString(batchRequest)
+
+    @Benchmark
+    fun KSerializationSerializeGraphQLRequest(): String = Json.encodeToString(request)
+
+    @Benchmark
+    fun KSerializationSerializeGraphQLBatchRequest(): String = Json.encodeToString(batchRequest)
+}
diff --git a/...phql-kotlin-server/src/benchmarks/kotlin/GraphQLServerResponseDeserializationBenchmark.kt b/...phql-kotlin-server/src/benchmarks/kotlin/GraphQLServerResponseDeserializationBenchmark.kt
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2024 Expedia, 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
+ *
+ *     https://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.expediagroup.graphql.server
+
+import com.expediagroup.graphql.server.testtypes.GraphQLServerResponse
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.module.kotlin.readValue
+import kotlinx.serialization.json.Json
+import org.openjdk.jmh.annotations.Benchmark
+import org.openjdk.jmh.annotations.Fork
+import org.openjdk.jmh.annotations.Measurement
+import org.openjdk.jmh.annotations.Scope
+import org.openjdk.jmh.annotations.Setup
+import org.openjdk.jmh.annotations.State
+import org.openjdk.jmh.annotations.Warmup
+import java.util.concurrent.TimeUnit
+
+@State(Scope.Benchmark)
+@Fork(5)
+@Warmup(iterations = 1, time = 5, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 5, time = 10, timeUnit = TimeUnit.SECONDS)
+open class GraphQLServerResponseDeserializationBenchmark {
+    private val mapper = jacksonObjectMapper()
+    private lateinit var response: String
+    private lateinit var batchResponse: String
+
+    @Setup
+    fun setUp() {
+        response = this::class.java.classLoader.getResource("StarWarsDetailsResponse.json")!!.readText()
+        batchResponse = """
+            [
+                $response,
+                $response,
+                $response,
+                $response
+            ]
+        """.trimIndent()
+    }
+
+    @Benchmark
+    fun JacksonDeserializeGraphQLResponse(): GraphQLServerResponse = mapper.readValue(response)
+
+    @Benchmark
+    fun JacksonDeserializeGraphQLBatchResponse(): GraphQLServerResponse = mapper.readValue(batchResponse)
+
+    @Benchmark
+    fun KSerializationDeserializeGraphQLResponse(): GraphQLServerResponse = Json.decodeFromString(response)
+
+    @Benchmark
+    fun KSerializationDeserializeGraphQLBatchResponse(): GraphQLServerResponse = Json.decodeFromString(batchResponse)
+}
diff --git a/...raphql-kotlin-server/src/benchmarks/kotlin/GraphQLServerResponseSerializationBenchmark.kt b/...raphql-kotlin-server/src/benchmarks/kotlin/GraphQLServerResponseSerializationBenchmark.kt
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2024 Expedia, 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
+ *
+ *     https://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.expediagroup.graphql.server
+
+import com.expediagroup.graphql.server.testtypes.GraphQLBatchResponse
+import com.expediagroup.graphql.server.testtypes.GraphQLResponse
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.module.kotlin.readValue
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import org.openjdk.jmh.annotations.Benchmark
+import org.openjdk.jmh.annotations.Fork
+import org.openjdk.jmh.annotations.Measurement
+import org.openjdk.jmh.annotations.Scope
+import org.openjdk.jmh.annotations.Setup
+import org.openjdk.jmh.annotations.State
+import org.openjdk.jmh.annotations.Warmup
+import java.util.concurrent.TimeUnit
+
+@State(Scope.Benchmark)
+@Fork(5)
+@Warmup(iterations = 1, time = 5, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 5, time = 10, timeUnit = TimeUnit.SECONDS)
+open class GraphQLServerResponseSerializationBenchmark {
+    private val mapper = jacksonObjectMapper()
+    private lateinit var response: GraphQLResponse
+    private lateinit var batchResponse: GraphQLBatchResponse
+
+    @Setup
+    fun setUp() {
+        val data = mapper.readValue<Map<String, Any?>>(
+            this::class.java.classLoader.getResourceAsStream("StarWarsDetailsResponse.json")!!
+        )
+        response = GraphQLResponse(
+            mapper.readValue<Map<String, Any?>>(
+                this::class.java.classLoader.getResourceAsStream("StarWarsDetailsResponse.json")!!
+            )
+        )
+        batchResponse = GraphQLBatchResponse(
+            GraphQLResponse(data),
+            GraphQLResponse(data),
+            GraphQLResponse(data),
+            GraphQLResponse(data)
+        )
+    }
+
+    @Benchmark
+    fun JacksonSerializeGraphQLResponse(): String = mapper.writeValueAsString(response)
+
+    @Benchmark
+    fun JacksonSerializeGraphQLBatchResponse(): String = mapper.writeValueAsString(batchResponse)
+
+    @Benchmark
+    fun KSerializationSerializeGraphQLResponse(): String = Json.encodeToString(response)
+
+    @Benchmark
+    fun KSerializationSerializeGraphQLBatchResponse(): String = Json.encodeToString(batchResponse)
+}
diff --git a/...chmarks/kotlin/GraphQLRequestBenchmark.kt → .../benchmarks/kotlin/IsMutationBenchmark.kt b/...chmarks/kotlin/GraphQLRequestBenchmark.kt → .../benchmarks/kotlin/IsMutationBenchmark.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 Expedia, Inc
+ * Copyright 2024 Expedia, Inc
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,7 +18,6 @@ package com.expediagroup.graphql.server
 
 import com.expediagroup.graphql.server.extensions.isMutation
 import com.expediagroup.graphql.server.types.GraphQLRequest
-import org.openjdk.jmh.annotations.Benchmark
 import org.openjdk.jmh.annotations.Setup
 import org.openjdk.jmh.annotations.State
 import org.openjdk.jmh.annotations.Scope
@@ -32,7 +31,7 @@ import kotlin.random.Random
 @Fork(1)
 @Warmup(iterations = 2)
 @Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
-open class GraphQLRequestBenchmark {
+open class IsMutationBenchmark {
     private val requests = mutableListOf<GraphQLRequest>()
 
     @Setup
@@ -68,7 +67,7 @@ open class GraphQLRequestBenchmark {
         requests.add(GraphQLRequest(mutation))
     }
 
-    @Benchmark
+    // @Benchmark
     fun isMutationBenchmark(): Boolean {
         return requests.any(GraphQLRequest::isMutation)
     }