org.springframework.boot.actuate.cassandra.CassandraHealthIndicator 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.ResultSet;
import com.datastax.driver.core.querybuilder.QueryBuilder;
import com.datastax.driver.core.querybuilder.Select;
import org.springframework.boot.actuate.health.AbstractHealthIndicator;
import org.springframework.boot.actuate.health.Health;
import org.springframework.boot.actuate.health.HealthIndicator;
import org.springframework.data.cassandra.core.CassandraOperations;
import org.springframework.util.Assert;
/**
* Simple implementation of a {@link HealthIndicator} returning status information for
* Cassandra data stores.
*
* @author Julien Dubois
* @since 2.0.0
*/
public class CassandraHealthIndicator extends AbstractHealthIndicator {
private CassandraOperations cassandraOperations;
public CassandraHealthIndicator() {
super("Cassandra health check failed");
}
/**
* Create a new {@link CassandraHealthIndicator} instance.
* @param cassandraOperations the Cassandra operations
*/
public CassandraHealthIndicator(CassandraOperations cassandraOperations) {
super("Cassandra health check failed");
Assert.notNull(cassandraOperations, "CassandraOperations must not be null");
this.cassandraOperations = cassandraOperations;
}
@Override
protected void doHealthCheck(Health.Builder builder) throws Exception {
Select select = QueryBuilder.select("release_version").from("system", "local");
ResultSet results = this.cassandraOperations.getCqlOperations()
.queryForResultSet(select);
if (results.isExhausted()) {
builder.up();
return;
}
String version = results.one().getString(0);
builder.up().withDetail("version", version);
}
}