content: /*
   * 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 org.apache.kafka.common.requests;
  
  
  import org.apache.kafka.common.message.SaslHandshakeRequestData;
  import org.apache.kafka.common.message.SaslHandshakeResponseData;
  import org.apache.kafka.common.protocol.ApiKeys;
  import org.apache.kafka.common.protocol.Readable;
  
  /**
   * Request from SASL client containing client SASL mechanism.
   * <p/>
   * For interoperability with Kafka 0.9.0.x, the mechanism flow may be omitted when using GSSAPI. Hence
   * this request should not conflict with the first GSSAPI client packet. For GSSAPI, the first context
   * establishment packet starts with byte 0x60 (APPLICATION-0 tag) followed by a variable-length encoded size.
   * This handshake request starts with a request header two-byte API key set to 17, followed by a mechanism name,
   * making it easy to distinguish from a GSSAPI packet.
   */
  public class SaslHandshakeRequest extends AbstractRequest {
  
      public static class Builder extends AbstractRequest.Builder<SaslHandshakeRequest> {
          private final SaslHandshakeRequestData data;
  
          public Builder(SaslHandshakeRequestData data) {
              super(ApiKeys.SASL_HANDSHAKE);
              this.data = data;
          }
  
          @Override
          public SaslHandshakeRequest build(short version) {
              return new SaslHandshakeRequest(data, version);
          }
  
          @Override
          public String toString() {
              return data.toString();
          }
      }
  
      private final SaslHandshakeRequestData data;
  
      public SaslHandshakeRequest(SaslHandshakeRequestData data, short version) {
          super(ApiKeys.SASL_HANDSHAKE, version);
          this.data = data;
      }
  
      @Override
      public SaslHandshakeRequestData data() {
          return data;
      }
  
      @Override
      public AbstractResponse getErrorResponse(int throttleTimeMs, Throwable e) {
          SaslHandshakeResponseData response = new SaslHandshakeResponseData();
          response.setErrorCode(ApiError.fromThrowable(e).error().code());
          return new SaslHandshakeResponse(response);
      }
  
      public static SaslHandshakeRequest parse(Readable readable, short version) {
          return new SaslHandshakeRequest(new SaslHandshakeRequestData(readable, version), version);
      }
  }
  