| /** |
| * 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.{BoundedByteBufferSend, RequestChannel} |
| import kafka.network.RequestChannel.Response |
| import kafka.common.ErrorMapping |
| |
| object ConsumerMetadataRequest { |
| 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) |
| ConsumerMetadataRequest(group, versionId, correlationId, clientId) |
| } |
| |
| } |
| |
| case class ConsumerMetadataRequest(group: String, |
| versionId: Short = ConsumerMetadataRequest.CurrentVersion, |
| correlationId: Int = 0, |
| clientId: String = ConsumerMetadataRequest.DefaultClientId) |
| extends RequestOrResponse(Some(RequestKeys.ConsumerMetadataKey)) { |
| |
| 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 = ConsumerMetadataResponse(None, ErrorMapping.ConsumerCoordinatorNotAvailableCode) |
| requestChannel.sendResponse(new Response(request, new BoundedByteBufferSend(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() |
| } |
| } |