kafka AclsImage 源码
kafka AclsImage 代码
文件路径：/metadata/src/main/java/org/apache/kafka/image/AclsImage.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.image;
import org.apache.kafka.common.Uuid;
import org.apache.kafka.image.writer.ImageWriter;
import org.apache.kafka.image.writer.ImageWriterOptions;
import org.apache.kafka.metadata.authorizer.StandardAcl;
import org.apache.kafka.metadata.authorizer.StandardAclWithId;
import java.util.Collections;
import java.util.Map;
import java.util.Map.Entry;
import java.util.stream.Collectors;
/**
* Represents the ACLs in the metadata image.
*
* This class is thread-safe.
*/
public final class AclsImage {
public static final AclsImage EMPTY = new AclsImage(Collections.emptyMap());
private final Map<Uuid, StandardAcl> acls;
public AclsImage(Map<Uuid, StandardAcl> acls) {
this.acls = Collections.unmodifiableMap(acls);
}
public boolean isEmpty() {
return acls.isEmpty();
}
public Map<Uuid, StandardAcl> acls() {
return acls;
}
public void write(ImageWriter writer, ImageWriterOptions options) {
// Technically, AccessControlEntryRecord appeared in 3.2-IV0, so we should not write it if
// the output version is less than that. However, there is a problem: pre-production KRaft
// images didn't support FeatureLevelRecord, so we can't distinguish 3.2-IV0 from 3.0-IV1.
// The least bad way to resolve this is just to pretend that ACLs were in 3.0-IV1.
for (Entry<Uuid, StandardAcl> entry : acls.entrySet()) {
StandardAclWithId aclWithId = new StandardAclWithId(entry.getKey(), entry.getValue());
writer.write(0, aclWithId.toRecord());
}
}
@Override
public int hashCode() {
return acls.hashCode();
}
@Override
public boolean equals(Object o) {
if (!(o instanceof AclsImage)) return false;
AclsImage other = (AclsImage) o;
return acls.equals(other.acls);
}
@Override
public String toString() {
return "AclsImage(" + acls.values().stream().
map(a -> a.toString()).
collect(Collectors.joining(", ")) + ")";
}
}
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