spring-data-elasticsearch ElasticsearchHost 源码
spring-data-elasticsearch ElasticsearchHost 代码
文件路径：/src/main/java/org/springframework/data/elasticsearch/client/ElasticsearchHost.java
/*
* Copyright 2018-2022 the original author or authors.
*
* Licensed 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
*
* https://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.springframework.data.elasticsearch.client;
import java.net.InetSocketAddress;
import java.time.Instant;
import org.springframework.util.Assert;
/**
* Value Object containing information about Elasticsearch cluster nodes.
*
* @author Christoph Strobl
* @since 3.2
*/
public class ElasticsearchHost {
/**
* Default HTTP port for Elasticsearch servers.
*/
public static final int DEFAULT_PORT = 9200;
private final InetSocketAddress endpoint;
private final State state;
private final Instant timestamp;
public ElasticsearchHost(InetSocketAddress endpoint, State state) {
Assert.notNull(endpoint, "Host must not be null");
Assert.notNull(state, "State must not be null");
this.endpoint = endpoint;
this.state = state;
this.timestamp = Instant.now();
}
/**
* @param host must not be {@literal null}.
* @return new instance of {@link ElasticsearchHost}.
*/
public static ElasticsearchHost online(InetSocketAddress host) {
return new ElasticsearchHost(host, State.ONLINE);
}
/**
* @param host must not be {@literal null}.
* @return new instance of {@link ElasticsearchHost}.
*/
public static ElasticsearchHost offline(InetSocketAddress host) {
return new ElasticsearchHost(host, State.OFFLINE);
}
/**
* Parse a {@literal hostAndPort} string into a {@link InetSocketAddress}.
*
* @param hostAndPort the string containing host and port or IP address and port in the format {@code host:port}.
* @return the parsed {@link InetSocketAddress}.
*/
public static InetSocketAddress parse(String hostAndPort) {
return InetSocketAddressParser.parse(hostAndPort, DEFAULT_PORT);
}
/**
* @return {@literal true} if the last known {@link State} was {@link State#ONLINE}
*/
public boolean isOnline() {
return State.ONLINE.equals(state);
}
/**
* @return never {@literal null}.
*/
public InetSocketAddress getEndpoint() {
return endpoint;
}
/**
* @return the last known {@link State}.
*/
public State getState() {
return state;
}
/**
* @return the {@link Instant} the information was captured.
*/
public Instant getTimestamp() {
return timestamp;
}
@Override
public String toString() {
return "ElasticsearchHost(" + endpoint + ", " + state.name() + ')';
}
public enum State {
ONLINE, OFFLINE, UNKNOWN
}
}
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