org.springframework.boot.actuate.cassandra.CassandraReactiveHealthIndicator Maven / Gradle / Ivy
/*
* Copyright 2012-2018 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 com.datastax.driver.core.querybuilder.QueryBuilder;
import com.datastax.driver.core.querybuilder.Select;
import reactor.core.publisher.Mono;
import org.springframework.boot.actuate.health.AbstractReactiveHealthIndicator;
import org.springframework.boot.actuate.health.Health;
import org.springframework.boot.actuate.health.ReactiveHealthIndicator;
import org.springframework.data.cassandra.core.ReactiveCassandraOperations;
import org.springframework.util.Assert;
/**
* A {@link ReactiveHealthIndicator} for Cassandra.
*
* @author Artsiom Yudovin
* @since 2.1.0
*/
public class CassandraReactiveHealthIndicator extends AbstractReactiveHealthIndicator {
private final ReactiveCassandraOperations reactiveCassandraOperations;
/**
* Create a new {@link CassandraHealthIndicator} instance.
* @param reactiveCassandraOperations the Cassandra operations
*/
public CassandraReactiveHealthIndicator(
ReactiveCassandraOperations reactiveCassandraOperations) {
Assert.notNull(reactiveCassandraOperations,
"ReactiveCassandraOperations must not be null");
this.reactiveCassandraOperations = reactiveCassandraOperations;
}
@Override
protected Mono doHealthCheck(Health.Builder builder) {
Select select = QueryBuilder.select("release_version").from("system", "local");
return this.reactiveCassandraOperations.getReactiveCqlOperations()
.queryForObject(select, String.class)
.map((version) -> builder.up().withDetail("version", version).build())
.single();
}
}