kafka ConfigResource 源码
kafka ConfigResource 代码
文件路径:/clients/src/main/java/org/apache/kafka/common/config/ConfigResource.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.config;
import java.util.Arrays;
import java.util.Collections;
import java.util.Map;
import java.util.Objects;
import java.util.function.Function;
import java.util.stream.Collectors;
/**
* A class representing resources that have configs.
*/
public final class ConfigResource {
/**
* Type of resource.
*/
public enum Type {
BROKER_LOGGER((byte) 8), BROKER((byte) 4), TOPIC((byte) 2), UNKNOWN((byte) 0);
private static final Map<Byte, Type> TYPES = Collections.unmodifiableMap(
Arrays.stream(values()).collect(Collectors.toMap(Type::id, Function.identity()))
);
private final byte id;
Type(final byte id) {
this.id = id;
}
public byte id() {
return id;
}
public static Type forId(final byte id) {
return TYPES.getOrDefault(id, UNKNOWN);
}
}
private final Type type;
private final String name;
/**
* Create an instance of this class with the provided parameters.
*
* @param type a non-null resource type
* @param name a non-null resource name
*/
public ConfigResource(Type type, String name) {
Objects.requireNonNull(type, "type should not be null");
Objects.requireNonNull(name, "name should not be null");
this.type = type;
this.name = name;
}
/**
* Return the resource type.
*/
public Type type() {
return type;
}
/**
* Return the resource name.
*/
public String name() {
return name;
}
/**
* Returns true if this is the default resource of a resource type.
* Resource name is empty for the default resource.
*/
public boolean isDefault() {
return name.isEmpty();
}
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
ConfigResource that = (ConfigResource) o;
return type == that.type && name.equals(that.name);
}
@Override
public int hashCode() {
int result = type.hashCode();
result = 31 * result + name.hashCode();
return result;
}
@Override
public String toString() {
return "ConfigResource(type=" + type + ", name='" + name + "')";
}
}
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