dajac commented on a change in pull request #9526:
URL: https://github.com/apache/kafka/pull/9526#discussion_r526258381



##########
File path: core/src/main/scala/kafka/network/RequestConvertToJson.scala
##########
@@ -0,0 +1,362 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 kafka.network
+
+import java.util
+
+import com.fasterxml.jackson.databind.JsonNode
+import com.fasterxml.jackson.databind.node.{ArrayNode, BinaryNode, DoubleNode, 
IntNode, JsonNodeFactory, LongNode, NullNode, ObjectNode, ShortNode, TextNode}
+import kafka.network.RequestChannel.{Response, Session}
+import org.apache.kafka.common.message._
+import org.apache.kafka.common.network.ClientInformation
+import org.apache.kafka.common.protocol.Errors
+import org.apache.kafka.common.record.RecordBatch
+import org.apache.kafka.common.requests._
+import org.apache.kafka.common.utils.CollectionUtils
+
+import scala.jdk.CollectionConverters._
+
+object RequestConvertToJson {
+  def request(request: AbstractRequest): JsonNode = {
+    request match {
+      case req: AddOffsetsToTxnRequest => 
AddOffsetsToTxnRequestDataJsonConverter.write(req.data, request.version)
+      case req: AddPartitionsToTxnRequest => 
AddPartitionsToTxnRequestDataJsonConverter.write(req.data, request.version)
+      case req: AlterClientQuotasRequest => 
AlterClientQuotasRequestDataJsonConverter.write(req.data, request.version)
+      case req: AlterConfigsRequest => 
AlterConfigsRequestDataJsonConverter.write(req.data, request.version)
+      case req: AlterIsrRequest => 
AlterIsrRequestDataJsonConverter.write(req.data, request.version)
+      case req: AlterPartitionReassignmentsRequest => 
AlterPartitionReassignmentsRequestDataJsonConverter.write(req.data, 
request.version)
+      case req: AlterReplicaLogDirsRequest => 
AlterReplicaLogDirsRequestDataJsonConverter.write(req.data, request.version)
+      case res: AlterUserScramCredentialsRequest => 
AlterUserScramCredentialsRequestDataJsonConverter.write(res.data, 
request.version)
+      case req: ApiVersionsRequest => 
ApiVersionsRequestDataJsonConverter.write(req.data, request.version)
+      case req: BeginQuorumEpochRequest => 
BeginQuorumEpochRequestDataJsonConverter.write(req.data, request.version)
+      case req: ControlledShutdownRequest => 
ControlledShutdownRequestDataJsonConverter.write(req.data, request.version)
+      case req: CreateAclsRequest => 
CreateAclsRequestDataJsonConverter.write(req.data, request.version)
+      case req: CreateDelegationTokenRequest => 
CreateDelegationTokenRequestDataJsonConverter.write(req.data, request.version)
+      case req: CreatePartitionsRequest => 
CreatePartitionsRequestDataJsonConverter.write(req.data, request.version)
+      case req: CreateTopicsRequest => 
CreateTopicsRequestDataJsonConverter.write(req.data, request.version)
+      case req: DeleteAclsRequest => 
DeleteAclsRequestDataJsonConverter.write(req.data, request.version)
+      case req: DeleteGroupsRequest => 
DeleteGroupsRequestDataJsonConverter.write(req.data, request.version)
+      case req: DeleteRecordsRequest => 
DeleteRecordsRequestDataJsonConverter.write(req.data, request.version)
+      case req: DeleteTopicsRequest => 
DeleteTopicsRequestDataJsonConverter.write(req.data, request.version)
+      case req: DescribeAclsRequest => 
DescribeAclsRequestDataJsonConverter.write(req.data, request.version)
+      case req: DescribeClientQuotasRequest => 
DescribeClientQuotasRequestDataJsonConverter.write(req.data, request.version)
+      case req: DescribeConfigsRequest => 
DescribeConfigsRequestDataJsonConverter.write(req.data, request.version)
+      case req: DescribeDelegationTokenRequest => 
DescribeDelegationTokenRequestDataJsonConverter.write(req.data, request.version)
+      case req: DescribeGroupsRequest => 
DescribeGroupsRequestDataJsonConverter.write(req.data, request.version)
+      case req: DescribeLogDirsRequest => 
DescribeLogDirsRequestDataJsonConverter.write(req.data, request.version)
+      case req: DescribeQuorumRequest => 
DescribeQuorumRequestDataJsonConverter.write(req.data, request.version)
+      case res: DescribeUserScramCredentialsRequest => 
DescribeUserScramCredentialsRequestDataJsonConverter.write(res.data, 
request.version)
+      case req: ElectLeadersRequest => 
ElectLeadersRequestDataJsonConverter.write(req.data, request.version)
+      case req: EndTxnRequest => 
EndTxnRequestDataJsonConverter.write(req.data, request.version)
+      case req: EndQuorumEpochRequest => 
EndQuorumEpochRequestDataJsonConverter.write(req.data, request.version)
+      case req: ExpireDelegationTokenRequest => 
ExpireDelegationTokenRequestDataJsonConverter.write(req.data, request.version)
+      case req: FetchRequest => FetchRequestDataJsonConverter.write(req.data, 
request.version)
+      case req: FindCoordinatorRequest => 
FindCoordinatorRequestDataJsonConverter.write(req.data, request.version)
+      case req: HeartbeatRequest => 
HeartbeatRequestDataJsonConverter.write(req.data, request.version)
+      case req: IncrementalAlterConfigsRequest => 
IncrementalAlterConfigsRequestDataJsonConverter.write(req.data, request.version)
+      case req: InitProducerIdRequest => 
InitProducerIdRequestDataJsonConverter.write(req.data, request.version)
+      case req: JoinGroupRequest => 
JoinGroupRequestDataJsonConverter.write(req.data, request.version)
+      case req: LeaderAndIsrRequest => 
LeaderAndIsrRequestDataJsonConverter.write(req.data, request.version)
+      case req: LeaveGroupRequest => 
LeaveGroupRequestDataJsonConverter.write(req.data, request.version)
+      case req: ListGroupsRequest => 
ListGroupsRequestDataJsonConverter.write(req.data, request.version)
+      case req: ListOffsetRequest => 
ListOffsetRequestDataJsonConverter.write(req.data, request.version)
+      case req: ListPartitionReassignmentsRequest => 
ListPartitionReassignmentsRequestDataJsonConverter.write(req.data, 
request.version)
+      case req: MetadataRequest => 
MetadataRequestDataJsonConverter.write(req.data, request.version)
+      case req: OffsetCommitRequest => 
OffsetCommitRequestDataJsonConverter.write(req.data, request.version)
+      case req: OffsetDeleteRequest => 
OffsetDeleteRequestDataJsonConverter.write(req.data, request.version)
+      case req: OffsetFetchRequest => 
OffsetFetchRequestDataJsonConverter.write(req.data, request.version)
+      case req: OffsetsForLeaderEpochRequest => 
offsetsForLeaderEpochRequestNode(req, request.version)
+      case req: ProduceRequest => produceRequestNode(req, request.version, 
false)
+      case req: RenewDelegationTokenRequest => 
RenewDelegationTokenRequestDataJsonConverter.write(req.data, request.version)
+      case req: SaslAuthenticateRequest => 
SaslAuthenticateRequestDataJsonConverter.write(req.data, request.version)
+      case req: SaslHandshakeRequest => 
SaslHandshakeRequestDataJsonConverter.write(req.data, request.version)
+      case req: StopReplicaRequest => 
StopReplicaRequestDataJsonConverter.write(req.data, request.version)
+      case req: SyncGroupRequest => 
SyncGroupRequestDataJsonConverter.write(req.data, request.version)
+      case req: TxnOffsetCommitRequest => 
TxnOffsetCommitRequestDataJsonConverter.write(req.data, request.version)
+      case req: UpdateFeaturesRequest => 
UpdateFeaturesRequestDataJsonConverter.write(req.data, request.version)
+      case req: UpdateMetadataRequest => 
UpdateMetadataRequestDataJsonConverter.write(req.data, request.version)
+      case req: VoteRequest => VoteRequestDataJsonConverter.write(req.data, 
request.version)
+      case req: WriteTxnMarkersRequest => 
WriteTxnMarkersRequestDataJsonConverter.write(req.data, request.version)
+      case _ => throw new IllegalStateException(s"ApiKey ${request.api} is not 
currently handled in `request`, the " +
+        "code should be updated to do so.");
+    }
+  }
+
+  def response(response: AbstractResponse, version: Short): JsonNode = {
+    response match {
+      case res: AddOffsetsToTxnResponse => 
AddOffsetsToTxnResponseDataJsonConverter.write(res.data, version)
+      case res: AddPartitionsToTxnResponse => 
AddPartitionsToTxnResponseDataJsonConverter.write(res.data, version)
+      case res: AlterClientQuotasResponse => 
AlterClientQuotasResponseDataJsonConverter.write(res.data, version)
+      case res: AlterConfigsResponse => 
AlterConfigsResponseDataJsonConverter.write(res.data, version)
+      case res: AlterIsrResponse => 
AlterIsrResponseDataJsonConverter.write(res.data, version)
+      case res: AlterPartitionReassignmentsResponse => 
AlterPartitionReassignmentsResponseDataJsonConverter.write(res.data, version)
+      case res: AlterReplicaLogDirsResponse => 
AlterReplicaLogDirsResponseDataJsonConverter.write(res.data, version)
+      case res: AlterUserScramCredentialsResponse => 
AlterUserScramCredentialsResponseDataJsonConverter.write(res.data, version)
+      case res: ApiVersionsResponse => 
ApiVersionsResponseDataJsonConverter.write(res.data, version)
+      case res: BeginQuorumEpochResponse => 
BeginQuorumEpochResponseDataJsonConverter.write(res.data, version)
+      case res: ControlledShutdownResponse => 
ControlledShutdownResponseDataJsonConverter.write(res.data, version)
+      case res: CreateAclsResponse => 
CreateAclsResponseDataJsonConverter.write(res.data, version)
+      case res: CreateDelegationTokenResponse => 
CreateDelegationTokenResponseDataJsonConverter.write(res.data, version)
+      case res: CreatePartitionsResponse => 
CreatePartitionsResponseDataJsonConverter.write(res.data, version)
+      case res: CreateTopicsResponse => 
CreateTopicsResponseDataJsonConverter.write(res.data, version)
+      case res: DeleteAclsResponse => 
DeleteAclsResponseDataJsonConverter.write(res.data, version)
+      case res: DeleteGroupsResponse => 
DeleteGroupsResponseDataJsonConverter.write(res.data, version)
+      case res: DeleteRecordsResponse => 
DeleteRecordsResponseDataJsonConverter.write(res.data, version)
+      case res: DeleteTopicsResponse => 
DeleteTopicsResponseDataJsonConverter.write(res.data, version)
+      case res: DescribeAclsResponse => 
DescribeAclsResponseDataJsonConverter.write(res.data, version)
+      case res: DescribeClientQuotasResponse => 
DescribeClientQuotasResponseDataJsonConverter.write(res.data, version)
+      case res: DescribeConfigsResponse => 
DescribeConfigsResponseDataJsonConverter.write(res.data, version)
+      case res: DescribeDelegationTokenResponse => 
DescribeDelegationTokenResponseDataJsonConverter.write(res.data, version)
+      case res: DescribeGroupsResponse => 
DescribeGroupsResponseDataJsonConverter.write(res.data, version)
+      case res: DescribeLogDirsResponse => 
DescribeLogDirsResponseDataJsonConverter.write(res.data, version)
+      case res: DescribeQuorumResponse => 
DescribeQuorumResponseDataJsonConverter.write(res.data, version)
+      case res: DescribeUserScramCredentialsResponse => 
DescribeUserScramCredentialsResponseDataJsonConverter.write(res.data, version)
+      case res: ElectLeadersResponse => 
ElectLeadersResponseDataJsonConverter.write(res.data, version)
+      case res: EndTxnResponse => 
EndTxnResponseDataJsonConverter.write(res.data, version)
+      case res: EndQuorumEpochResponse => 
EndQuorumEpochResponseDataJsonConverter.write(res.data, version)
+      case res: ExpireDelegationTokenResponse => 
ExpireDelegationTokenResponseDataJsonConverter.write(res.data, version)
+      case res: FetchResponse[_] => 
FetchResponseDataJsonConverter.write(res.data, version, false)
+      case res: FindCoordinatorResponse => 
FindCoordinatorResponseDataJsonConverter.write(res.data, version)
+      case res: HeartbeatResponse => 
HeartbeatResponseDataJsonConverter.write(res.data, version)
+      case res: IncrementalAlterConfigsResponse => 
IncrementalAlterConfigsResponseDataJsonConverter.write(res.data, version)
+      case res: InitProducerIdResponse => 
InitProducerIdResponseDataJsonConverter.write(res.data, version)
+      case res: JoinGroupResponse => 
JoinGroupResponseDataJsonConverter.write(res.data, version)
+      case res: LeaderAndIsrResponse => 
LeaderAndIsrResponseDataJsonConverter.write(res.data, version)
+      case res: LeaveGroupResponse => 
LeaveGroupResponseDataJsonConverter.write(res.data, version)
+      case res: ListGroupsResponse => 
ListGroupsResponseDataJsonConverter.write(res.data, version)
+      case res: ListOffsetResponse => 
ListOffsetResponseDataJsonConverter.write(res.data, version)
+      case res: ListPartitionReassignmentsResponse => 
ListPartitionReassignmentsResponseDataJsonConverter.write(res.data, version)
+      case res: MetadataResponse => 
MetadataResponseDataJsonConverter.write(res.data, version)
+      case res: OffsetCommitResponse => 
OffsetCommitResponseDataJsonConverter.write(res.data, version)
+      case res: OffsetDeleteResponse => 
OffsetDeleteResponseDataJsonConverter.write(res.data, version)
+      case res: OffsetFetchResponse => 
OffsetFetchResponseDataJsonConverter.write(res.data, version)
+      case res: OffsetsForLeaderEpochResponse => 
offsetsForLeaderEpochResponseNode(res, version)
+      case res: ProduceResponse => produceResponseNode(res, version)
+      case res: RenewDelegationTokenResponse => 
RenewDelegationTokenResponseDataJsonConverter.write(res.data, version)
+      case res: SaslAuthenticateResponse => 
SaslAuthenticateResponseDataJsonConverter.write(res.data, version)
+      case res: SaslHandshakeResponse => 
SaslHandshakeResponseDataJsonConverter.write(res.data, version)
+      case res: StopReplicaResponse => 
StopReplicaResponseDataJsonConverter.write(res.data, version)
+      case res: SyncGroupResponse => 
SyncGroupResponseDataJsonConverter.write(res.data, version)
+      case res: TxnOffsetCommitResponse => 
TxnOffsetCommitResponseDataJsonConverter.write(res.data, version)
+      case res: UpdateFeaturesResponse => 
UpdateFeaturesResponseDataJsonConverter.write(res.data, version)
+      case res: UpdateMetadataResponse => 
UpdateMetadataResponseDataJsonConverter.write(res.data, version)
+      case res: WriteTxnMarkersResponse => 
WriteTxnMarkersResponseDataJsonConverter.write(res.data, version)
+      case res: VoteResponse => VoteResponseDataJsonConverter.write(res.data, 
version)
+      case _ => throw new IllegalStateException(s"ApiKey $response is not 
currently handled in `response`, the " +
+        "code should be updated to do so.");
+    }
+  }
+
+  def requestHeaderNode(header: RequestHeader): JsonNode = {
+    val node = RequestHeaderDataJsonConverter.write(header.data(), 
header.headerVersion(), false).asInstanceOf[ObjectNode]
+    node.set("requestApiKeyName", new TextNode(header.apiKey.toString))
+    node
+  }
+
+  def requestDesc(header: RequestHeader, req: AbstractRequest): JsonNode = {
+    val node = new ObjectNode(JsonNodeFactory.instance)
+    node.set("requestHeader", requestHeaderNode(header))
+    node.set("request", request(req))
+    node
+  }
+
+  def clientInfoNode(clientInfo: ClientInformation): JsonNode = {
+    val node = new ObjectNode(JsonNodeFactory.instance)
+    node.set("softwareName", new TextNode(clientInfo.softwareName()))
+    node.set("softwareVersion", new TextNode(clientInfo.softwareVersion()))
+    node
+  }
+
+  def requestDescMetrics(header: RequestHeader, res: Response, req: 
AbstractRequest,
+                         context: RequestContext, session: Session,
+                         totalTimeMs: Double, requestQueueTimeMs: Double, 
apiLocalTimeMs: Double,
+                         apiRemoteTimeMs: Double, apiThrottleTimeMs: Long, 
responseQueueTimeMs: Double,
+                         responseSendTimeMs: Double, temporaryMemoryBytes: 
Long,
+                         messageConversionsTimeMs: Double): JsonNode = {
+    val node = requestDesc(header, req).asInstanceOf[ObjectNode]
+    node.set("response", res.responseLog.getOrElse(new TextNode("")))
+    node.set("connection", new TextNode(context.connectionId))
+    node.set("totalTimeMs", new DoubleNode(totalTimeMs))
+    node.set("requestQueueTimeMs", new DoubleNode(requestQueueTimeMs))
+    node.set("localTimeMs", new DoubleNode(apiLocalTimeMs))
+    node.set("remoteTimeMs", new DoubleNode(apiRemoteTimeMs))
+    node.set("throttleTimeMs", new LongNode(apiThrottleTimeMs))
+    node.set("responseQueueTimeMs", new DoubleNode(responseQueueTimeMs))
+    node.set("sendTimeMs", new DoubleNode(responseSendTimeMs))
+    node.set("securityProtocol", new 
TextNode(context.securityProtocol.toString))
+    node.set("principal", new TextNode(session.principal.toString))
+    node.set("listener", new TextNode(context.listenerName.value))
+    node.set("clientInformation", clientInfoNode(context.clientInformation))
+    if (temporaryMemoryBytes > 0)
+      node.set("temporaryMemoryBytes", new LongNode(temporaryMemoryBytes))
+    if (messageConversionsTimeMs > 0)
+      node.set("messageConversionsTime", new 
DoubleNode(messageConversionsTimeMs))
+    node
+  }
+
+  /**
+   * Temporary until switch to use the generated schemas.
+   */
+  def offsetsForLeaderEpochRequestNode(request: OffsetsForLeaderEpochRequest, 
version: Short): JsonNode = {
+    val node = new ObjectNode(JsonNodeFactory.instance)
+    if (version >= 3) {
+      node.set("replicaId", new IntNode(request.replicaId))
+    }
+    val topics = 
CollectionUtils.groupPartitionDataByTopic(request.epochsByTopicPartition)
+    val topicsArray = new ArrayNode(JsonNodeFactory.instance)
+    topics.forEach { (topicName, partitions) =>
+      val topicNode = new ObjectNode(JsonNodeFactory.instance)
+      topicNode.set("name", new TextNode(topicName))
+      val partitionsArray = new ArrayNode(JsonNodeFactory.instance)
+      partitions.forEach { (partitionIndex, partitionData) =>
+        val partitionNode = new ObjectNode(JsonNodeFactory.instance)
+        partitionNode.set("partitionIndex", new IntNode(partitionIndex))
+        if (version >= 2) {
+          val leaderEpoch = partitionData.currentLeaderEpoch
+          partitionNode.set("currentLeaderEpoch", new 
IntNode(leaderEpoch.orElse(RecordBatch.NO_PARTITION_LEADER_EPOCH)))
+        }
+        partitionNode.set("leaderEpoch", new 
IntNode(partitionData.leaderEpoch))
+        partitionsArray.add(partitionNode)
+      }
+      topicNode.set("partitions", partitionsArray)
+      topicsArray.add(topicNode)
+    }
+    node.set("topics", topicsArray)
+    node
+  }
+
+  /**
+   * Temporary until switch to use the generated schemas.
+   */
+  def produceRequestNode(request: ProduceRequest, version: Short, 
serializeRecords: Boolean): JsonNode = {
+    val node = new ObjectNode(JsonNodeFactory.instance)
+    if (version >= 3) {
+      if (request.transactionalId == null) {
+        node.set("transactionalId", NullNode.instance)
+      } else {
+        node.set("transactionalId", new TextNode(request.transactionalId))
+      }
+    }
+    node.set("acks", new ShortNode(request.acks))
+    node.set("timeoutMs", new IntNode(request.timeout))
+    val topics = 
CollectionUtils.groupPartitionDataByTopic(request.partitionRecordsOrFail())
+    val topicsArray = new ArrayNode(JsonNodeFactory.instance)
+    topics.forEach { (topicName, partitions) =>
+      val topicNode = new ObjectNode(JsonNodeFactory.instance)
+      topicNode.set("name", new TextNode(topicName))
+      val partitionsArray = new ArrayNode(JsonNodeFactory.instance)
+      partitions.forEach { (partitionIndex, partitionData) =>
+        val partitionNode = new ObjectNode(JsonNodeFactory.instance)
+        partitionNode.set("partitionIndex", new IntNode(partitionIndex))
+        if (partitionData == null) {
+          partitionNode.set("records", NullNode.instance)
+        } else {
+          if (serializeRecords)
+            partitionNode.set("records", new 
BinaryNode(util.Arrays.copyOf(partitionData.buffer().array(), 
partitionData.validBytes())))
+          else
+            partitionNode.set("records", new 
IntNode(partitionData.validBytes()))
+        }
+        partitionsArray.add(partitionNode)
+      }
+      topicNode.set("partitions", partitionsArray)
+      topicsArray.add(topicNode)
+    }
+    node.set("topics", topicsArray)
+    node
+  }
+
+  /**
+   * Temporary until switch to use the generated schemas.
+   */
+  def offsetsForLeaderEpochResponseNode(response: 
OffsetsForLeaderEpochResponse, version: Short): JsonNode = {
+    val node = new ObjectNode(JsonNodeFactory.instance)
+    if (version >= 2) {
+      node.set("throttleTimeMs", new IntNode(response.throttleTimeMs))
+    }
+    val topics = CollectionUtils.groupPartitionDataByTopic(response.responses)
+    val topicsArray = new ArrayNode(JsonNodeFactory.instance)
+    topics.forEach { (topicName, partitions) =>
+      val topicNode = new ObjectNode(JsonNodeFactory.instance)
+      topicNode.set("name", new TextNode(topicName))
+      val partitionsArray = new ArrayNode(JsonNodeFactory.instance)
+      partitions.forEach { (partitionIndex, partitionData) =>
+        val partitionNode = new ObjectNode(JsonNodeFactory.instance)
+        partitionNode.set("errorCode", new ShortNode(partitionData.error.code))
+        partitionNode.set("partitionIndex", new IntNode(partitionIndex))
+        if (version >= 1) partitionNode.set("leaderEpoch", new 
IntNode(partitionData.leaderEpoch))
+        partitionNode.set("endOffset", new LongNode(partitionData.endOffset))
+        partitionsArray.add(partitionNode)
+      }
+      topicNode.set("partitions", partitionsArray)
+      topicsArray.add(topicNode)
+    }
+    node.set("topics", topicsArray)
+    node
+  }
+
+  /**
+   * Temporary until switch to use the generated schemas.
+   */
+  def produceResponseNode(response: ProduceResponse, version: Short): JsonNode 
= {

Review comment:
       We are actually waiting on that one and this one 
https://github.com/apache/kafka/pull/9547.




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