spring CassandraDriverHealthIndicator 源码
springboot CassandraDriverHealthIndicator 代码
文件路径：/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/cassandra/CassandraDriverHealthIndicator.java
/*
* Copyright 2012-2020 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.boot.actuate.cassandra;
import java.util.Collection;
import java.util.Optional;
import com.datastax.oss.driver.api.core.CqlSession;
import com.datastax.oss.driver.api.core.metadata.Node;
import com.datastax.oss.driver.api.core.metadata.NodeState;
import org.springframework.boot.actuate.health.AbstractHealthIndicator;
import org.springframework.boot.actuate.health.Health;
import org.springframework.boot.actuate.health.HealthIndicator;
import org.springframework.boot.actuate.health.Status;
import org.springframework.util.Assert;
/**
* Simple implementation of a {@link HealthIndicator} returning status information for
* Cassandra data stores.
*
* @author Alexandre Dutra
* @author Tomasz Lelek
* @since 2.4.0
*/
public class CassandraDriverHealthIndicator extends AbstractHealthIndicator {
private final CqlSession session;
/**
* Create a new {@link CassandraDriverHealthIndicator} instance.
* @param session the {@link CqlSession}.
*/
public CassandraDriverHealthIndicator(CqlSession session) {
super("Cassandra health check failed");
Assert.notNull(session, "session must not be null");
this.session = session;
}
@Override
protected void doHealthCheck(Health.Builder builder) throws Exception {
Collection<Node> nodes = this.session.getMetadata().getNodes().values();
Optional<Node> nodeUp = nodes.stream().filter((node) -> node.getState() == NodeState.UP).findAny();
builder.status(nodeUp.isPresent() ? Status.UP : Status.DOWN);
nodeUp.map(Node::getCassandraVersion).ifPresent((version) -> builder.withDetail("version", version));
}
}
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- 本文标签： Spring Boot Java Spring
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