kafka BrokerState 源码
kafka BrokerState 代码
文件路径：/metadata/src/main/java/org/apache/kafka/metadata/BrokerState.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.metadata;
import org.apache.kafka.common.annotation.InterfaceStability;
import java.util.HashMap;
import java.util.Map;
/**
* The broker state.
*
* The numeric values used here are part of Kafka's public API. They appear in metrics,
* and are also sent over the wire in some cases.
*
* The expected state transitions are:
*
* NOT_RUNNING
* ↓
* STARTING
* ↓
* RECOVERY
* ↓
* RUNNING
* ↓
* PENDING_CONTROLLED_SHUTDOWN
* ↓
* SHUTTING_DOWN
*/
@InterfaceStability.Evolving
public enum BrokerState {
/**
* The state the broker is in when it first starts up.
*/
NOT_RUNNING((byte) 0),
/**
* The state the broker is in when it is catching up with cluster metadata.
*/
STARTING((byte) 1),
/**
* The broker has caught up with cluster metadata, but has not yet
* been unfenced by the controller.
*/
RECOVERY((byte) 2),
/**
* The state the broker is in when it has registered at least once, and is
* accepting client requests.
*/
RUNNING((byte) 3),
/**
* The state the broker is in when it is attempting to perform a controlled
* shutdown.
*/
PENDING_CONTROLLED_SHUTDOWN((byte) 6),
/**
* The state the broker is in when it is shutting down.
*/
SHUTTING_DOWN((byte) 7),
/**
* The broker is in an unknown state.
*/
UNKNOWN((byte) 127);
private final static Map<Byte, BrokerState> VALUES_TO_ENUMS = new HashMap<>();
static {
for (BrokerState state : BrokerState.values()) {
VALUES_TO_ENUMS.put(state.value(), state);
}
}
private final byte value;
BrokerState(byte value) {
this.value = value;
}
public static BrokerState fromValue(byte value) {
BrokerState state = VALUES_TO_ENUMS.get(value);
if (state == null) {
return UNKNOWN;
}
return state;
}
public byte value() {
return value;
}
}
相关信息
相关文章
kafka BrokerRegistrationFencingChange 源码
kafka BrokerRegistrationInControlledShutdownChange 源码
kafka BrokerRegistrationReply 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