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DataSourceHealthContributorAutoConfiguration.java
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DataSourceHealthContributorAutoConfiguration.java
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/*
* Copyright 2012-2021 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.autoconfigure.jdbc;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import java.util.Objects;
import java.util.function.Function;
import java.util.stream.Collectors;
import javax.sql.DataSource;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.ObjectProvider;
import org.springframework.boot.actuate.autoconfigure.health.ConditionalOnEnabledHealthIndicator;
import org.springframework.boot.actuate.health.CompositeHealthContributor;
import org.springframework.boot.actuate.health.HealthContributor;
import org.springframework.boot.actuate.health.NamedContributor;
import org.springframework.boot.actuate.jdbc.DataSourceHealthIndicator;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.boot.jdbc.metadata.CompositeDataSourcePoolMetadataProvider;
import org.springframework.boot.jdbc.metadata.DataSourcePoolMetadata;
import org.springframework.boot.jdbc.metadata.DataSourcePoolMetadataProvider;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;
import org.springframework.util.Assert;
/**
* {@link EnableAutoConfiguration Auto-configuration} for
* {@link DataSourceHealthIndicator}.
*
* @author Dave Syer
* @author Christian Dupuis
* @author Andy Wilkinson
* @author Stephane Nicoll
* @author Arthur Kalimullin
* @author Julio Gomez
* @author Safeer Ansari
* @since 2.0.0
*/
@Configuration(proxyBeanMethods = false)
@ConditionalOnClass({ JdbcTemplate.class, AbstractRoutingDataSource.class })
@ConditionalOnBean(DataSource.class)
@ConditionalOnEnabledHealthIndicator("db")
@AutoConfigureAfter(DataSourceAutoConfiguration.class)
@EnableConfigurationProperties(DataSourceHealthIndicatorProperties.class)
public class DataSourceHealthContributorAutoConfiguration implements InitializingBean {
private final Collection<DataSourcePoolMetadataProvider> metadataProviders;
private DataSourcePoolMetadataProvider poolMetadataProvider;
public DataSourceHealthContributorAutoConfiguration(
ObjectProvider<DataSourcePoolMetadataProvider> metadataProviders) {
this.metadataProviders = metadataProviders.orderedStream().collect(Collectors.toList());
}
@Override
public void afterPropertiesSet() {
this.poolMetadataProvider = new CompositeDataSourcePoolMetadataProvider(this.metadataProviders);
}
@Bean
@ConditionalOnMissingBean(name = { "dbHealthIndicator", "dbHealthContributor" })
public HealthContributor dbHealthContributor(Map<String, DataSource> dataSources,
DataSourceHealthIndicatorProperties dataSourceHealthIndicatorProperties) {
if (dataSourceHealthIndicatorProperties.isIgnoreRoutingDataSources()) {
Map<String, DataSource> filteredDatasources = dataSources.entrySet().stream()
.filter((e) -> !(e.getValue() instanceof AbstractRoutingDataSource))
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
return createContributor(filteredDatasources);
}
return createContributor(dataSources);
}
private HealthContributor createContributor(Map<String, DataSource> beans) {
Assert.notEmpty(beans, "Beans must not be empty");
if (beans.size() == 1) {
return createContributor(beans.values().iterator().next());
}
return CompositeHealthContributor.fromMap(beans, this::createContributor);
}
private HealthContributor createContributor(DataSource source) {
if (source instanceof AbstractRoutingDataSource) {
AbstractRoutingDataSource routingDataSource = (AbstractRoutingDataSource) source;
return new RoutingDataSourceHealthContributor(routingDataSource, this::createContributor);
}
return new DataSourceHealthIndicator(source, getValidationQuery(source));
}
private String getValidationQuery(DataSource source) {
DataSourcePoolMetadata poolMetadata = this.poolMetadataProvider.getDataSourcePoolMetadata(source);
return (poolMetadata != null) ? poolMetadata.getValidationQuery() : null;
}
/**
* {@link CompositeHealthContributor} used for {@link AbstractRoutingDataSource} beans
* where the overall health is composed of a {@link DataSourceHealthIndicator} for
* each routed datasource.
*/
static class RoutingDataSourceHealthContributor implements CompositeHealthContributor {
private final CompositeHealthContributor delegate;
private static final String UNNAMED_DATASOURCE_KEY = "unnamed";
RoutingDataSourceHealthContributor(AbstractRoutingDataSource routingDataSource,
Function<DataSource, HealthContributor> contributorFunction) {
Map<String, DataSource> routedDataSources = routingDataSource.getResolvedDataSources().entrySet().stream()
.collect(Collectors.toMap((e) -> Objects.toString(e.getKey(), UNNAMED_DATASOURCE_KEY),
Map.Entry::getValue));
this.delegate = CompositeHealthContributor.fromMap(routedDataSources, contributorFunction);
}
@Override
public HealthContributor getContributor(String name) {
return this.delegate.getContributor(name);
}
@Override
public Iterator<NamedContributor<HealthContributor>> iterator() {
return this.delegate.iterator();
}
}
}