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/*
 * 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.types.Struct;

import java.nio.ByteBuffer;

/**
 * Request from SASL client containing client SASL mechanism.
 * 

* 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 { 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; private final short version; public SaslHandshakeRequest(SaslHandshakeRequestData data) { this(data, ApiKeys.SASL_HANDSHAKE.latestVersion()); } public SaslHandshakeRequest(SaslHandshakeRequestData data, short version) { super(ApiKeys.SASL_HANDSHAKE, version); this.data = data; this.version = version; } public SaslHandshakeRequest(Struct struct, short version) { super(ApiKeys.SASL_HANDSHAKE, version); this.data = new SaslHandshakeRequestData(struct, version); this.version = version; } 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(ByteBuffer buffer, short version) { return new SaslHandshakeRequest(ApiKeys.SASL_HANDSHAKE.parseRequest(version, buffer), version); } @Override protected Struct toStruct() { return data.toStruct(version); } }





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