kafka.api.GroupCoordinatorRequest.scala Maven / Gradle / Ivy
/**
* 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.api
import java.nio.ByteBuffer
import kafka.network.{RequestOrResponseSend, RequestChannel}
import kafka.network.RequestChannel.Response
import org.apache.kafka.common.protocol.{ApiKeys, Errors}
object GroupCoordinatorRequest {
val CurrentVersion = 0.shortValue
val DefaultClientId = ""
def readFrom(buffer: ByteBuffer) = {
// envelope
val versionId = buffer.getShort
val correlationId = buffer.getInt
val clientId = ApiUtils.readShortString(buffer)
// request
val group = ApiUtils.readShortString(buffer)
GroupCoordinatorRequest(group, versionId, correlationId, clientId)
}
}
case class GroupCoordinatorRequest(group: String,
versionId: Short = GroupCoordinatorRequest.CurrentVersion,
correlationId: Int = 0,
clientId: String = GroupCoordinatorRequest.DefaultClientId)
extends RequestOrResponse(Some(ApiKeys.GROUP_COORDINATOR.id)) {
def sizeInBytes =
2 + /* versionId */
4 + /* correlationId */
ApiUtils.shortStringLength(clientId) +
ApiUtils.shortStringLength(group)
def writeTo(buffer: ByteBuffer) {
// envelope
buffer.putShort(versionId)
buffer.putInt(correlationId)
ApiUtils.writeShortString(buffer, clientId)
// consumer metadata request
ApiUtils.writeShortString(buffer, group)
}
override def handleError(e: Throwable, requestChannel: RequestChannel, request: RequestChannel.Request): Unit = {
// return ConsumerCoordinatorNotAvailable for all uncaught errors
val errorResponse = GroupCoordinatorResponse(None, Errors.GROUP_COORDINATOR_NOT_AVAILABLE.code, correlationId)
requestChannel.sendResponse(new Response(request, new RequestOrResponseSend(request.connectionId, errorResponse)))
}
def describe(details: Boolean) = {
val consumerMetadataRequest = new StringBuilder
consumerMetadataRequest.append("Name: " + this.getClass.getSimpleName)
consumerMetadataRequest.append("; Version: " + versionId)
consumerMetadataRequest.append("; CorrelationId: " + correlationId)
consumerMetadataRequest.append("; ClientId: " + clientId)
consumerMetadataRequest.append("; Group: " + group)
consumerMetadataRequest.toString()
}
}