kafka LogDirDescription 源码
kafka LogDirDescription 代码
文件路径:/clients/src/main/java/org/apache/kafka/clients/admin/LogDirDescription.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.clients.admin;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.errors.ApiException;
import java.util.Map;
import java.util.OptionalLong;
import static java.util.Collections.unmodifiableMap;
import static org.apache.kafka.common.requests.DescribeLogDirsResponse.UNKNOWN_VOLUME_BYTES;
/**
* A description of a log directory on a particular broker.
*/
public class LogDirDescription {
private final Map<TopicPartition, ReplicaInfo> replicaInfos;
private final ApiException error;
private final OptionalLong totalBytes;
private final OptionalLong usableBytes;
public LogDirDescription(ApiException error, Map<TopicPartition, ReplicaInfo> replicaInfos) {
this(error, replicaInfos, UNKNOWN_VOLUME_BYTES, UNKNOWN_VOLUME_BYTES);
}
public LogDirDescription(ApiException error, Map<TopicPartition, ReplicaInfo> replicaInfos, long totalBytes, long usableBytes) {
this.error = error;
this.replicaInfos = replicaInfos;
this.totalBytes = (totalBytes == UNKNOWN_VOLUME_BYTES) ? OptionalLong.empty() : OptionalLong.of(totalBytes);
this.usableBytes = (usableBytes == UNKNOWN_VOLUME_BYTES) ? OptionalLong.empty() : OptionalLong.of(usableBytes);
}
/**
* Returns `ApiException` if the log directory is offline or an error occurred, otherwise returns null.
* <ul>
* <li> KafkaStorageException - The log directory is offline.
* <li> UnknownServerException - The server experienced an unexpected error when processing the request.
* </ul>
*/
public ApiException error() {
return error;
}
/**
* A map from topic partition to replica information for that partition
* in this log directory.
*/
public Map<TopicPartition, ReplicaInfo> replicaInfos() {
return unmodifiableMap(replicaInfos);
}
/**
* The total size of the volume this log directory is on or empty if the broker did not return a value.
* For volumes larger than Long.MAX_VALUE, Long.MAX_VALUE is returned.
*/
public OptionalLong totalBytes() {
return totalBytes;
}
/**
* The usable size on the volume this log directory is on or empty if the broker did not return a value.
* For usable sizes larger than Long.MAX_VALUE, Long.MAX_VALUE is returned.
*/
public OptionalLong usableBytes() {
return usableBytes;
}
@Override
public String toString() {
return "LogDirDescription(" +
"replicaInfos=" + replicaInfos +
", error=" + error +
", totalBytes=" + totalBytes +
", usableBytes=" + usableBytes +
')';
}
}
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