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Core module of Micrometer containing instrumentation API and implementation
/*
* Copyright 2017 VMware, Inc.
*
* 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 io.micrometer.core.instrument.binder.jpa;
import io.micrometer.core.instrument.*;
import io.micrometer.core.instrument.binder.MeterBinder;
import io.micrometer.core.lang.NonNullApi;
import io.micrometer.core.lang.NonNullFields;
import io.micrometer.core.lang.Nullable;
import org.hibernate.SessionFactory;
import org.hibernate.stat.Statistics;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceException;
import java.util.Arrays;
import java.util.concurrent.TimeUnit;
import java.util.function.ToDoubleFunction;
/**
* A {@link MeterBinder} implementation that provides Hibernate metrics. It exposes the
* same statistics as would be exposed when calling {@link Statistics#logSummary()}.
*
* @author Marten Deinum
* @author Jon Schneider
* @author Johnny Lim
* @implNote This implementation requires Hibernate 5.3 or later.
* @deprecated This implementation is deprecated in favor of the MeterBinder maintained as
* part of the Hibernate project as of version 5.4.26. See
* https://mvnrepository.com/artifact/org.hibernate/hibernate-micrometer/
*/
@NonNullApi
@NonNullFields
@Deprecated
public class HibernateMetrics implements MeterBinder {
private static final String SESSION_FACTORY_TAG_NAME = "entityManagerFactory";
private final Iterable tags;
@Nullable
private final Statistics statistics;
/**
* Create {@code HibernateMetrics} and bind to the specified meter registry.
* @param registry meter registry to use
* @param sessionFactory session factory to use
* @param sessionFactoryName session factory name as a tag value
* @param tags additional tags
*/
public static void monitor(MeterRegistry registry, SessionFactory sessionFactory, String sessionFactoryName,
String... tags) {
monitor(registry, sessionFactory, sessionFactoryName, Tags.of(tags));
}
/**
* Create {@code HibernateMetrics} and bind to the specified meter registry.
* @param registry meter registry to use
* @param sessionFactory session factory to use
* @param sessionFactoryName session factory name as a tag value
* @param tags additional tags
*/
public static void monitor(MeterRegistry registry, SessionFactory sessionFactory, String sessionFactoryName,
Iterable tags) {
new HibernateMetrics(sessionFactory, sessionFactoryName, tags).bindTo(registry);
}
/**
* Create {@code HibernateMetrics} and bind to the specified meter registry.
* @param registry meter registry to use
* @param entityManagerFactory entity manager factory to use
* @param entityManagerFactoryName entity manager factory name as a tag value
* @param tags additional tags
* @deprecated since 1.1.2 in favor of
* {@link #monitor(MeterRegistry, SessionFactory, String, String...)}
*/
@Deprecated
public static void monitor(MeterRegistry registry, EntityManagerFactory entityManagerFactory,
String entityManagerFactoryName, String... tags) {
monitor(registry, entityManagerFactory, entityManagerFactoryName, Tags.of(tags));
}
/**
* Create {@code HibernateMetrics} and bind to the specified meter registry.
* @param registry meter registry to use
* @param entityManagerFactory entity manager factory to use
* @param entityManagerFactoryName entity manager factory name as a tag value
* @param tags additional tags
* @deprecated since 1.1.2 in favor of
* {@link #monitor(MeterRegistry, SessionFactory, String, Iterable)}
*/
@Deprecated
public static void monitor(MeterRegistry registry, EntityManagerFactory entityManagerFactory,
String entityManagerFactoryName, Iterable tags) {
new HibernateMetrics(entityManagerFactory, entityManagerFactoryName, tags).bindTo(registry);
}
/**
* Create a {@code HibernateMetrics}.
* @param sessionFactory session factory to use
* @param sessionFactoryName session factory name as a tag value
* @param tags additional tags
*/
public HibernateMetrics(SessionFactory sessionFactory, String sessionFactoryName, Iterable tags) {
this.tags = Tags.concat(tags, SESSION_FACTORY_TAG_NAME, sessionFactoryName);
Statistics statistics = sessionFactory.getStatistics();
this.statistics = statistics.isStatisticsEnabled() ? statistics : null;
}
/**
* Create a {@code HibernateMetrics}.
* @param entityManagerFactory entity manager factory to use
* @param entityManagerFactoryName entity manager factory name as a tag value
* @param tags additional tags
* @deprecated since 1.1.2 in favor of
* {@link #HibernateMetrics(SessionFactory, String, Iterable)}
*/
@Deprecated
public HibernateMetrics(EntityManagerFactory entityManagerFactory, String entityManagerFactoryName,
Iterable tags) {
this.tags = Tags.concat(tags, SESSION_FACTORY_TAG_NAME, entityManagerFactoryName);
SessionFactory sessionFactory = unwrap(entityManagerFactory);
if (sessionFactory != null) {
Statistics statistics = sessionFactory.getStatistics();
this.statistics = statistics.isStatisticsEnabled() ? statistics : null;
}
else {
this.statistics = null;
}
}
private void counter(MeterRegistry registry, String name, String description, ToDoubleFunction f,
String... extraTags) {
if (this.statistics == null) {
return;
}
FunctionCounter.builder(name, statistics, f).tags(tags).tags(extraTags).description(description)
.register(registry);
}
@Override
public void bindTo(MeterRegistry registry) {
if (this.statistics == null) {
return;
}
// Session statistics
counter(registry, "hibernate.sessions.open", "Sessions opened", Statistics::getSessionOpenCount);
counter(registry, "hibernate.sessions.closed", "Sessions closed", Statistics::getSessionCloseCount);
// Transaction statistics
counter(registry, "hibernate.transactions", "The number of transactions we know to have been successful",
Statistics::getSuccessfulTransactionCount, "result", "success");
counter(registry, "hibernate.transactions", "The number of transactions we know to have failed",
s -> s.getTransactionCount() - s.getSuccessfulTransactionCount(), "result", "failure");
counter(registry, "hibernate.optimistic.failures",
"The number of StaleObjectStateExceptions that have occurred", Statistics::getOptimisticFailureCount);
counter(registry, "hibernate.flushes",
"The global number of flushes executed by sessions (either implicit or explicit)",
Statistics::getFlushCount);
counter(registry, "hibernate.connections.obtained",
"Get the global number of connections asked by the sessions "
+ "(the actual number of connections used may be much smaller depending "
+ "whether you use a connection pool or not)",
Statistics::getConnectCount);
// Statements
counter(registry, "hibernate.statements", "The number of prepared statements that were acquired",
Statistics::getPrepareStatementCount, "status", "prepared");
counter(registry, "hibernate.statements", "The number of prepared statements that were released",
Statistics::getCloseStatementCount, "status", "closed");
// Second Level Caching
Arrays.stream(statistics.getSecondLevelCacheRegionNames()).filter(this::hasDomainDataRegionStatistics)
.forEach(regionName -> {
counter(registry, "hibernate.second.level.cache.requests",
"The number of cacheable entities/collections successfully retrieved from the cache",
stats -> stats.getDomainDataRegionStatistics(regionName).getHitCount(), "region",
regionName, "result", "hit");
counter(registry, "hibernate.second.level.cache.requests",
"The number of cacheable entities/collections not found in the cache and loaded from the database",
stats -> stats.getDomainDataRegionStatistics(regionName).getMissCount(), "region",
regionName, "result", "miss");
counter(registry, "hibernate.second.level.cache.puts",
"The number of cacheable entities/collections put in the cache",
stats -> stats.getDomainDataRegionStatistics(regionName).getPutCount(), "region",
regionName);
});
// Entity information
counter(registry, "hibernate.entities.deletes", "The number of entity deletes",
Statistics::getEntityDeleteCount);
counter(registry, "hibernate.entities.fetches", "The number of entity fetches",
Statistics::getEntityFetchCount);
counter(registry, "hibernate.entities.inserts", "The number of entity inserts",
Statistics::getEntityInsertCount);
counter(registry, "hibernate.entities.loads", "The number of entity loads", Statistics::getEntityLoadCount);
counter(registry, "hibernate.entities.updates", "The number of entity updates",
Statistics::getEntityUpdateCount);
// Collections
counter(registry, "hibernate.collections.deletes", "The number of collection deletes",
Statistics::getCollectionRemoveCount);
counter(registry, "hibernate.collections.fetches", "The number of collection fetches",
Statistics::getCollectionFetchCount);
counter(registry, "hibernate.collections.loads", "The number of collection loads",
Statistics::getCollectionLoadCount);
counter(registry, "hibernate.collections.recreates", "The number of collections recreated",
Statistics::getCollectionRecreateCount);
counter(registry, "hibernate.collections.updates", "The number of collection updates",
Statistics::getCollectionUpdateCount);
// Natural Id cache
counter(registry, "hibernate.cache.natural.id.requests",
"The number of cached naturalId lookups successfully retrieved from cache",
Statistics::getNaturalIdCacheHitCount, "result", "hit");
counter(registry, "hibernate.cache.natural.id.requests",
"The number of cached naturalId lookups not found in cache", Statistics::getNaturalIdCacheMissCount,
"result", "miss");
counter(registry, "hibernate.cache.natural.id.puts", "The number of cacheable naturalId lookups put in cache",
Statistics::getNaturalIdCachePutCount);
counter(registry, "hibernate.query.natural.id.executions",
"The number of naturalId queries executed against the database",
Statistics::getNaturalIdQueryExecutionCount);
TimeGauge
.builder("hibernate.query.natural.id.executions.max", statistics, TimeUnit.MILLISECONDS,
Statistics::getNaturalIdQueryExecutionMaxTime)
.description("The maximum query time for naturalId queries executed against the database").tags(tags)
.register(registry);
// Query statistics
counter(registry, "hibernate.query.executions", "The number of executed queries",
Statistics::getQueryExecutionCount);
TimeGauge
.builder("hibernate.query.executions.max", statistics, TimeUnit.MILLISECONDS,
Statistics::getQueryExecutionMaxTime)
.description("The time of the slowest query").tags(tags).register(registry);
// Update timestamp cache
counter(registry, "hibernate.cache.update.timestamps.requests",
"The number of timestamps successfully retrieved from cache",
Statistics::getUpdateTimestampsCacheHitCount, "result", "hit");
counter(registry, "hibernate.cache.update.timestamps.requests",
"The number of tables for which no update timestamps was not found in cache",
Statistics::getUpdateTimestampsCacheMissCount, "result", "miss");
counter(registry, "hibernate.cache.update.timestamps.puts", "The number of timestamps put in cache",
Statistics::getUpdateTimestampsCachePutCount);
// Query Caching
counter(registry, "hibernate.cache.query.requests",
"The number of cached queries successfully retrieved from cache", Statistics::getQueryCacheHitCount,
"result", "hit");
counter(registry, "hibernate.cache.query.requests", "The number of cached queries not found in cache",
Statistics::getQueryCacheMissCount, "result", "miss");
counter(registry, "hibernate.cache.query.puts", "The number of cacheable queries put in cache",
Statistics::getQueryCachePutCount);
counter(registry, "hibernate.cache.query.plan",
"The global number of query plans successfully retrieved from cache",
Statistics::getQueryPlanCacheHitCount, "result", "hit");
counter(registry, "hibernate.cache.query.plan", "The global number of query plans lookups not found in cache",
Statistics::getQueryPlanCacheMissCount, "result", "miss");
}
private boolean hasDomainDataRegionStatistics(String regionName) {
// In 5.3, getDomainDataRegionStatistics (a new method) will throw an
// IllegalArgumentException
// if the region can't be resolved.
try {
return statistics.getDomainDataRegionStatistics(regionName) != null;
}
catch (IllegalArgumentException e) {
return false;
}
}
/**
* Unwrap the {@link SessionFactory} from {@link EntityManagerFactory}.
* @param entityManagerFactory {@link EntityManagerFactory} to unwrap
* @return unwrapped {@link SessionFactory}
*/
@Nullable
private SessionFactory unwrap(EntityManagerFactory entityManagerFactory) {
try {
return entityManagerFactory.unwrap(SessionFactory.class);
}
catch (PersistenceException ex) {
return null;
}
}
}