kafka ConfigEntry 源码

  • 2022-10-20
  • 浏览 (589)

kafka ConfigEntry 代码

文件路径:/clients/src/main/java/org/apache/kafka/clients/admin/ConfigEntry.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.annotation.InterfaceStability;

import java.util.Collections;
import java.util.List;
import java.util.Objects;

/**
 * A class representing a configuration entry containing name, value and additional metadata.
 *
 * The API of this class is evolving, see {@link Admin} for details.
 */
@InterfaceStability.Evolving
public class ConfigEntry {

    private final String name;
    private final String value;
    private final ConfigSource source;
    private final boolean isSensitive;
    private final boolean isReadOnly;
    private final List<ConfigSynonym> synonyms;
    private final ConfigType type;
    private final String documentation;

    /**
     * Create a configuration entry with the provided values.
     *
     * @param name the non-null config name
     * @param value the config value or null
     */
    public ConfigEntry(String name, String value) {
        this(name, value, ConfigSource.UNKNOWN, false, false,
            Collections.emptyList(), ConfigType.UNKNOWN, null);
    }

    /**
     * Create a configuration with the provided values.
     *
     * @param name the non-null config name
     * @param value the config value or null
     * @param source the source of this config entry
     * @param isSensitive whether the config value is sensitive, the broker never returns the value if it is sensitive
     * @param isReadOnly whether the config is read-only and cannot be updated
     * @param synonyms Synonym configs in order of precedence
     */
    public ConfigEntry(String name,
            String value,
            ConfigSource source,
            boolean isSensitive,
            boolean isReadOnly,
            List<ConfigSynonym> synonyms,
            ConfigType type,
            String documentation) {
        Objects.requireNonNull(name, "name should not be null");
        this.name = name;
        this.value = value;
        this.source = source;
        this.isSensitive = isSensitive;
        this.isReadOnly = isReadOnly;
        this.synonyms = synonyms;
        this.type = type;
        this.documentation = documentation;
    }

    /**
     * Return the config name.
     */
    public String name() {
        return name;
    }

    /**
     * Return the value or null. Null is returned if the config is unset or if isSensitive is true.
     */
    public String value() {
        return value;
    }

    /**
     * Return the source of this configuration entry.
     */
    public ConfigSource source() {
        return source;
    }

    /**
     * Return whether the config value is the default or if it's been explicitly set.
     */
    public boolean isDefault() {
        return source == ConfigSource.DEFAULT_CONFIG;
    }

    /**
     * Return whether the config value is sensitive. The value is always set to null by the broker if the config value
     * is sensitive.
     */
    public boolean isSensitive() {
        return isSensitive;
    }

    /**
     * Return whether the config is read-only and cannot be updated.
     */
    public boolean isReadOnly() {
        return isReadOnly;
    }

    /**
     * Returns all config values that may be used as the value of this config along with their source,
     * in the order of precedence. The list starts with the value returned in this ConfigEntry.
     * The list is empty if synonyms were not requested using {@link DescribeConfigsOptions#includeSynonyms(boolean)}
     */
    public List<ConfigSynonym> synonyms() {
        return  synonyms;
    }

    /**
     * Return the config data type.
     */
    public ConfigType type() {
        return type;
    }

    /**
     * Return the config documentation.
     */
    public String documentation() {
        return documentation;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o)
            return true;
        if (o == null || getClass() != o.getClass())
            return false;

        ConfigEntry that = (ConfigEntry) o;

        return this.name.equals(that.name) &&
                Objects.equals(this.value, that.value) &&
                this.isSensitive == that.isSensitive &&
                this.isReadOnly == that.isReadOnly &&
                Objects.equals(this.source, that.source) &&
                Objects.equals(this.synonyms, that.synonyms) &&
                Objects.equals(this.type, that.type) &&
                Objects.equals(this.documentation, that.documentation);
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + name.hashCode();
        result = prime * result + Objects.hashCode(value);
        result = prime * result + (isSensitive ? 1 : 0);
        result = prime * result + (isReadOnly ? 1 : 0);
        result = prime * result + Objects.hashCode(source);
        result = prime * result + Objects.hashCode(synonyms);
        result = prime * result + Objects.hashCode(type);
        result = prime * result + Objects.hashCode(documentation);
        return result;
    }

    /**
     * Override toString to redact sensitive value.
     * WARNING, user should be responsible to set the correct "isSensitive" field for each config entry.
     */
    @Override
    public String toString() {
        return "ConfigEntry(" +
                "name=" + name +
                ", value=" + (isSensitive ? "Redacted" : value) +
                ", source=" + source +
                ", isSensitive=" + isSensitive +
                ", isReadOnly=" + isReadOnly +
                ", synonyms=" + synonyms +
                ", type=" + type +
                ", documentation=" + documentation +
                ")";
    }

    /**
     * Data type of configuration entry.
     */
    public enum ConfigType {
        UNKNOWN,
        BOOLEAN,
        STRING,
        INT,
        SHORT,
        LONG,
        DOUBLE,
        LIST,
        CLASS,
        PASSWORD
    }

    /**
     * Source of configuration entries.
     */
    public enum ConfigSource {
        DYNAMIC_TOPIC_CONFIG,           // dynamic topic config that is configured for a specific topic
        DYNAMIC_BROKER_LOGGER_CONFIG,   // dynamic broker logger config that is configured for a specific broker
        DYNAMIC_BROKER_CONFIG,          // dynamic broker config that is configured for a specific broker
        DYNAMIC_DEFAULT_BROKER_CONFIG,  // dynamic broker config that is configured as default for all brokers in the cluster
        STATIC_BROKER_CONFIG,           // static broker config provided as broker properties at start up (e.g. server.properties file)
        DEFAULT_CONFIG,                 // built-in default configuration for configs that have a default value
        UNKNOWN                         // source unknown e.g. in the ConfigEntry used for alter requests where source is not set
    }

    /**
     * Class representing a configuration synonym of a {@link ConfigEntry}.
     */
    public static class ConfigSynonym {

        private final String name;
        private final String value;
        private final ConfigSource source;

        /**
         * Create a configuration synonym with the provided values.
         *
         * @param name Configuration name (this may be different from the name of the associated {@link ConfigEntry}
         * @param value Configuration value
         * @param source {@link ConfigSource} of this configuraton
         */
        ConfigSynonym(String name, String value, ConfigSource source) {
            this.name = name;
            this.value = value;
            this.source = source;
        }

        /**
         * Returns the name of this configuration.
         */
        public String name() {
            return name;
        }

        /**
         * Returns the value of this configuration, which may be null if the configuration is sensitive.
         */
        public String value() {
            return value;
        }

        /**
         * Returns the source of this configuration.
         */
        public ConfigSource source() {
            return source;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;

            ConfigSynonym that = (ConfigSynonym) o;
            return Objects.equals(name, that.name) && Objects.equals(value, that.value) && source == that.source;
        }

        @Override
        public int hashCode() {
            return Objects.hash(name, value, source);
        }

        @Override
        public String toString() {
            return "ConfigSynonym(" +
                    "name=" + name +
                    ", value=" + value +
                    ", source=" + source +
                    ")";
        }
    }
}

相关信息

kafka 源码目录

相关文章

kafka AbortTransactionOptions 源码

kafka AbortTransactionResult 源码

kafka AbortTransactionSpec 源码

kafka AbstractOptions 源码

kafka Admin 源码

kafka AdminClient 源码

kafka AdminClientConfig 源码

kafka AlterClientQuotasOptions 源码

kafka AlterClientQuotasResult 源码

kafka AlterConfigOp 源码

0  赞