kafka ApiVersionsRequest 源码
kafka ApiVersionsRequest 代码
文件路径:/clients/src/main/java/org/apache/kafka/common/requests/ApiVersionsRequest.java
/*
* 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 java.util.regex.Pattern;
import org.apache.kafka.common.message.ApiVersionsRequestData;
import org.apache.kafka.common.message.ApiVersionsResponseData;
import org.apache.kafka.common.message.ApiVersionsResponseData.ApiVersionCollection;
import org.apache.kafka.common.protocol.ApiKeys;
import org.apache.kafka.common.protocol.ByteBufferAccessor;
import org.apache.kafka.common.protocol.Errors;
import org.apache.kafka.common.utils.AppInfoParser;
import java.nio.ByteBuffer;
public class ApiVersionsRequest extends AbstractRequest {
public static class Builder extends AbstractRequest.Builder<ApiVersionsRequest> {
private static final String DEFAULT_CLIENT_SOFTWARE_NAME = "apache-kafka-java";
private static final ApiVersionsRequestData DATA = new ApiVersionsRequestData()
.setClientSoftwareName(DEFAULT_CLIENT_SOFTWARE_NAME)
.setClientSoftwareVersion(AppInfoParser.getVersion());
public Builder() {
super(ApiKeys.API_VERSIONS);
}
public Builder(short version) {
super(ApiKeys.API_VERSIONS, version);
}
@Override
public ApiVersionsRequest build(short version) {
return new ApiVersionsRequest(DATA, version);
}
@Override
public String toString() {
return DATA.toString();
}
}
private static final Pattern SOFTWARE_NAME_VERSION_PATTERN = Pattern.compile("[a-zA-Z0-9](?:[a-zA-Z0-9\\-.]*[a-zA-Z0-9])?");
private final Short unsupportedRequestVersion;
private final ApiVersionsRequestData data;
public ApiVersionsRequest(ApiVersionsRequestData data, short version) {
this(data, version, null);
}
public ApiVersionsRequest(ApiVersionsRequestData data, short version, Short unsupportedRequestVersion) {
super(ApiKeys.API_VERSIONS, version);
this.data = data;
// Unlike other request types, the broker handles ApiVersion requests with higher versions than
// supported. It does so by treating the request as if it were v0 and returns a response using
// the v0 response schema. The reason for this is that the client does not yet know what versions
// a broker supports when this request is sent, so instead of assuming the lowest supported version,
// it can use the most recent version and only fallback to the old version when necessary.
this.unsupportedRequestVersion = unsupportedRequestVersion;
}
public boolean hasUnsupportedRequestVersion() {
return unsupportedRequestVersion != null;
}
public boolean isValid() {
if (version() >= 3) {
return SOFTWARE_NAME_VERSION_PATTERN.matcher(data.clientSoftwareName()).matches() &&
SOFTWARE_NAME_VERSION_PATTERN.matcher(data.clientSoftwareVersion()).matches();
} else {
return true;
}
}
@Override
public ApiVersionsRequestData data() {
return data;
}
@Override
public ApiVersionsResponse getErrorResponse(int throttleTimeMs, Throwable e) {
ApiVersionsResponseData data = new ApiVersionsResponseData()
.setErrorCode(Errors.forException(e).code());
if (version() >= 1) {
data.setThrottleTimeMs(throttleTimeMs);
}
// Starting from Apache Kafka 2.4 (KIP-511), ApiKeys field is populated with the supported
// versions of the ApiVersionsRequest when an UNSUPPORTED_VERSION error is returned.
if (Errors.forException(e) == Errors.UNSUPPORTED_VERSION) {
ApiVersionCollection apiKeys = new ApiVersionCollection();
apiKeys.add(ApiVersionsResponse.toApiVersion(ApiKeys.API_VERSIONS));
data.setApiKeys(apiKeys);
}
return new ApiVersionsResponse(data);
}
public static ApiVersionsRequest parse(ByteBuffer buffer, short version) {
return new ApiVersionsRequest(new ApiVersionsRequestData(new ByteBufferAccessor(buffer), version), version);
}
}
相关信息
相关文章
kafka AbstractControlRequest 源码
kafka AbstractRequestResponse 源码
kafka AddOffsetsToTxnRequest 源码
kafka AddOffsetsToTxnResponse 源码
kafka AddPartitionsToTxnRequest 源码
kafka AddPartitionsToTxnResponse 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦