Merge pull request #11479 from chaos2418/JAVA-8435

JAVA-8435: reducing logging for tutorials-integration job

persistence-modules/r2dbc/src/test/resources/logback-test.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="15 seconds" debug="false">
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%d{ISO8601}]-[%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

persistence-modules/spring-boot-persistence-2/src/test/resources/logback-test.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="15 seconds" debug="false">
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%d{ISO8601}]-[%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

persistence-modules/spring-boot-persistence-h2/src/main/java/com/baeldung/h2db/lazy_load_no_trans/config/DatasourceProxyBeanPostProcessor.java

@@ -1,10 +1,7 @@
 package com.baeldung.h2db.lazy_load_no_trans.config;
 
 import net.ttddyy.dsproxy.listener.DataSourceQueryCountListener;
-import net.ttddyy.dsproxy.listener.logging.CommonsQueryLoggingListener;
-import net.ttddyy.dsproxy.listener.logging.DefaultQueryLogEntryCreator;
 import net.ttddyy.dsproxy.listener.logging.SLF4JLogLevel;
-import net.ttddyy.dsproxy.listener.logging.SLF4JQueryLoggingListener;
 import net.ttddyy.dsproxy.support.ProxyDataSource;
 import net.ttddyy.dsproxy.support.ProxyDataSourceBuilder;
 import org.aopalliance.intercept.MethodInterceptor;
@@ -49,7 +46,7 @@ public class DatasourceProxyBeanPostProcessor implements BeanPostProcessor {
             this.dataSource = ProxyDataSourceBuilder.create(dataSource)
                     .name("MyDS")
                     .multiline()
-                    .logQueryBySlf4j(SLF4JLogLevel.INFO)
+                    .logQueryBySlf4j(SLF4JLogLevel.DEBUG)
                     .listener(new DataSourceQueryCountListener())
                     .build();
         }

persistence-modules/spring-boot-persistence-h2/src/main/resources/application.properties

@@ -4,7 +4,7 @@ spring.datasource.username=sa
 spring.datasource.password=
 spring.jpa.defer-datasource-initialization=true
 spring.jpa.hibernate.ddl-auto=create-drop
-spring.jpa.show-sql=true
+spring.jpa.show-sql=false
 spring.jpa.properties.hibernate.format_sql=true
 spring.jpa.properties.hibernate.validator.apply_to_ddl=false
 #spring.jpa.properties.hibernate.check_nullability=true

persistence-modules/spring-boot-persistence-mongodb/src/test/resources/logback-test.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="15 seconds" debug="false">
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%d{ISO8601}]-[%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

persistence-modules/spring-data-cassandra-reactive/src/test/resources/logback-test.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="15 seconds" debug="false">
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%d{ISO8601}]-[%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

persistence-modules/spring-data-jpa-query-2/src/test/java/com/baeldung/persistence/hibernate/FooFixtures.java

@@ -10,8 +10,13 @@ import org.hibernate.SessionFactory;
 import org.hibernate.Transaction;
 
 import com.google.common.collect.Lists;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class FooFixtures {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(FooFixtures.class);
+
     private SessionFactory sessionFactory;
 
     public FooFixtures(final SessionFactory sessionFactory) {
@@ -36,8 +41,9 @@ public class FooFixtures {
                 foo.setBar(bar);
                 session.save(foo);
                 final Foo foo2 = new Foo(null);
-                if (i % 2 == 0)
+                if (i % 2 == 0) {
                     foo2.setName("LuckyFoo" + (i + 120));
+                }
                 foo2.setBar(bar);
                 session.save(foo2);
                 bar.getFooSet().add(foo);
@@ -47,15 +53,16 @@ public class FooFixtures {
             tx.commit();
             session.flush();
         } catch (final HibernateException he) {
-            if (tx != null)
+            if (tx != null) {
                 tx.rollback();
-            System.out.println("Not able to open session");
-            he.printStackTrace();
+            }
+            LOGGER.error("Not able to open session", he);
         } catch (final Exception e) {
-            e.printStackTrace();
+            LOGGER.error(e.getLocalizedMessage(), e);
         } finally {
-            if (session != null)
+            if (session != null) {
                 session.close();
+            }
         }
 
     }
@@ -86,15 +93,16 @@ public class FooFixtures {
             tx.commit();
             session.flush();
         } catch (final HibernateException he) {
-            if (tx != null)
+            if (tx != null) {
                 tx.rollback();
-            System.out.println("Not able to open session");
-            he.printStackTrace();
+            }
+            LOGGER.error("Not able to open session", he);
         } catch (final Exception e) {
-            e.printStackTrace();
+            LOGGER.error(e.getLocalizedMessage(), e);
         } finally {
-            if (session != null)
+            if (session != null) {
                 session.close();
+            }
         }
     }
 

persistence-modules/spring-data-jpa-query-2/src/test/java/com/baeldung/persistence/hibernate/FooSortingPersistenceIntegrationTest.java

@@ -15,6 +15,8 @@ import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@@ -29,6 +31,8 @@ import com.baeldung.spring.config.PersistenceTestConfig;
 @SuppressWarnings("unchecked")
 public class FooSortingPersistenceIntegrationTest {
 
+    private static final Logger LOGGER = LoggerFactory.getLogger(FooSortingPersistenceIntegrationTest.class);
+
     @Autowired
     private SessionFactory sessionFactory;
 
@@ -56,7 +60,7 @@ public class FooSortingPersistenceIntegrationTest {
         final Query query = session.createQuery(hql);
         final List<Foo> fooList = query.list();
         for (final Foo foo : fooList) {
-            System.out.println("Name: " + foo.getName() + ", Id: " + foo.getId());
+            LOGGER.debug("Name: {} , Id: {}", foo.getName(), foo.getId());
         }
     }
 
@@ -68,7 +72,7 @@ public class FooSortingPersistenceIntegrationTest {
 
         assertNull(fooList.get(fooList.toArray().length - 1).getName());
         for (final Foo foo : fooList) {
-            System.out.println("Name: " + foo.getName() + ", Id: " + foo.getId());
+            LOGGER.debug("Name: {}, Id: {}", foo.getName(), foo.getId());
         }
     }
 
@@ -79,7 +83,7 @@ public class FooSortingPersistenceIntegrationTest {
         final List<Foo> fooList = query.list();
         assertNull(fooList.get(0).getName());
         for (final Foo foo : fooList) {
-            System.out.println("Name:" + foo.getName());
+            LOGGER.debug("Name: {}", foo.getName());
 
         }
     }
@@ -90,7 +94,7 @@ public class FooSortingPersistenceIntegrationTest {
         final Query query = session.createQuery(hql);
         final List<Foo> fooList = query.list();
         for (final Foo foo : fooList) {
-            System.out.println("Name: " + foo.getName() + ", Id: " + foo.getId());
+            LOGGER.debug("Name: {}, Id: {}", foo.getName(), foo.getId());
         }
     }
 
@@ -100,7 +104,7 @@ public class FooSortingPersistenceIntegrationTest {
         final Query query = session.createQuery(hql);
         final List<Foo> fooList = query.list();
         for (final Foo foo : fooList) {
-            System.out.println("Name: " + foo.getName() + ", Id: " + foo.getId());
+            LOGGER.debug("Name: {}, Id: {}", foo.getName(), foo.getId());
         }
     }
 
@@ -110,7 +114,7 @@ public class FooSortingPersistenceIntegrationTest {
         final Query query = session.createQuery(hql);
         final List<Foo> fooList = query.list();
         for (final Foo foo : fooList) {
-            System.out.println("Name: " + foo.getName() + ", Id: " + foo.getId());
+            LOGGER.debug("Name: {}, Id: {}", foo.getName(), foo.getId());
         }
     }
 
@@ -120,7 +124,7 @@ public class FooSortingPersistenceIntegrationTest {
         criteria.addOrder(Order.asc("id"));
         final List<Foo> fooList = criteria.list();
         for (final Foo foo : fooList) {
-            System.out.println("Id: " + foo.getId() + ", FirstName: " + foo.getName());
+            LOGGER.debug("Id: {}, FirstName: {}", foo.getId(), foo.getName());
         }
     }
 
@@ -131,7 +135,7 @@ public class FooSortingPersistenceIntegrationTest {
         criteria.addOrder(Order.asc("id"));
         final List<Foo> fooList = criteria.list();
         for (final Foo foo : fooList) {
-            System.out.println("Id: " + foo.getId() + ", FirstName: " + foo.getName());
+            LOGGER.debug("Id: {}, FirstName: {}", foo.getId(), foo.getName());
         }
     }
 
@@ -142,7 +146,7 @@ public class FooSortingPersistenceIntegrationTest {
         final List<Foo> fooList = criteria.list();
         assertNull(fooList.get(fooList.toArray().length - 1).getName());
         for (final Foo foo : fooList) {
-            System.out.println("Id: " + foo.getId() + ", FirstName: " + foo.getName());
+            LOGGER.debug("Id: {}, FirstName: {}", foo.getId(), foo.getName());
         }
     }
 
@@ -153,7 +157,7 @@ public class FooSortingPersistenceIntegrationTest {
         final List<Foo> fooList = criteria.list();
         assertNull(fooList.get(0).getName());
         for (final Foo foo : fooList) {
-            System.out.println("Id: " + foo.getId() + ", FirstName: " + foo.getName());
+            LOGGER.debug("Id: {}, FirstName: {}", foo.getId(), foo.getName());
         }
     }
 
@@ -164,9 +168,9 @@ public class FooSortingPersistenceIntegrationTest {
         final List<Bar> barList = query.list();
         for (final Bar bar : barList) {
             final Set<Foo> fooSet = bar.getFooSet();
-            System.out.println("Bar Id:" + bar.getId());
+            LOGGER.debug("Bar Id:{}", bar.getId());
             for (final Foo foo : fooSet) {
-                System.out.println("FooName:" + foo.getName());
+                LOGGER.debug("FooName:{}", foo.getName());
             }
         }
     }

persistence-modules/spring-data-jpa-query-2/src/test/java/com/baeldung/persistence/service/ParentServicePersistenceIntegrationTest.java

@@ -1,7 +1,10 @@
 package com.baeldung.persistence.service;
 
+import com.baeldung.persistence.hibernate.FooSortingPersistenceIntegrationTest;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.test.context.ContextConfiguration;
@@ -16,6 +19,8 @@ import com.baeldung.spring.config.PersistenceTestConfig;
 @ContextConfiguration(classes = { PersistenceTestConfig.class }, loader = AnnotationConfigContextLoader.class)
 public class ParentServicePersistenceIntegrationTest {
 
+    private static final Logger LOGGER = LoggerFactory.getLogger(ParentServicePersistenceIntegrationTest.class);
+    
     @Autowired
     private IParentService service;
 
@@ -37,11 +42,11 @@ public class ParentServicePersistenceIntegrationTest {
         final Parent parentEntity = new Parent(childEntity);
         service.create(parentEntity);
 
-        System.out.println("Child = " + childService.findOne(childEntity.getId()));
-        System.out.println("Child - parent = " + childService.findOne(childEntity.getId()).getParent());
+        LOGGER.debug("Child = {}", childService.findOne(childEntity.getId()));
+        LOGGER.debug("Child - parent = {}", childService.findOne(childEntity.getId()).getParent());
 
-        System.out.println("Parent = " + service.findOne(parentEntity.getId()));
-        System.out.println("Parent - child = " + service.findOne(parentEntity.getId()).getChild());
+        LOGGER.debug("Parent = {}", service.findOne(parentEntity.getId()));
+        LOGGER.debug("Parent - child = {}", service.findOne(parentEntity.getId()).getChild());
     }
 
     @Test(expected = DataIntegrityViolationException.class)

persistence-modules/spring-data-jpa-query-2/src/test/java/com/baeldung/spring/config/PersistenceTestConfig.java

@@ -166,7 +166,7 @@ public class PersistenceTestConfig {
         hibernateProperties.setProperty("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
         hibernateProperties.setProperty("hibernate.dialect", env.getProperty("hibernate.dialect"));
 
-        hibernateProperties.setProperty("hibernate.show_sql", "true");
+        hibernateProperties.setProperty("hibernate.show_sql", "false");
         // hibernateProperties.setProperty("hibernate.format_sql", "true");
         // hibernateProperties.setProperty("hibernate.globally_quoted_identifiers", "true");
 

persistence-modules/spring-data-jpa-query-2/src/test/java/com/baeldung/spring/data/jpa/query/UserRepositoryIntegrationTest.java

@@ -19,7 +19,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 @RunWith(SpringRunner.class)
-@DataJpaTest(properties = "spring.sql.init.data-locations=classpath:insert_users.sql")
+@DataJpaTest(properties = "spring.sql.init.data-locations=classpath:insert_users.sql", showSql = false)
 public class UserRepositoryIntegrationTest {
 
     @Autowired

persistence-modules/spring-data-jpa-query-2/src/test/java/com/baeldung/spring/data/jpa/query/datetime/ArticleRepositoryIntegrationTest.java

@@ -17,7 +17,7 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 @RunWith(SpringRunner.class)
-@DataJpaTest(properties="spring.sql.init.data-locations=classpath:import_entities.sql")
+@DataJpaTest(properties="spring.sql.init.data-locations=classpath:import_entities.sql", showSql = false)
 public class ArticleRepositoryIntegrationTest {
 
     @Autowired

persistence-modules/spring-data-jpa-query-2/src/test/resources/fetching.cfg.xml

@@ -11,7 +11,7 @@
 		<property name="hibernate.connection.password"></property>
 		<property name="hibernate.dialect">org.hibernate.dialect.H2Dialect</property>
 		<property name="hibernate.hbm2ddl.auto">update</property>
-		<property name="show_sql">true</property>
+		<property name="show_sql">false</property>
 		
 		<mapping class="com.baeldung.hibernate.fetching.model.UserEager" />
         <mapping class="com.baeldung.hibernate.fetching.model.OrderDetail" />

persistence-modules/spring-data-jpa-query-2/src/test/resources/fetchingLazy.cfg.xml

@@ -11,7 +11,7 @@
 		<property name="hibernate.connection.password"></property>
 		<property name="hibernate.dialect">org.hibernate.dialect.H2Dialect</property>
 		<property name="hibernate.hbm2ddl.auto">update</property>
-		<property name="show_sql">true</property>
+		<property name="show_sql">false</property>
 		<mapping class="com.baeldung.hibernate.fetching.model.UserLazy" />
 		<mapping class="com.baeldung.hibernate.fetching.model.OrderDetail" />
 

persistence-modules/spring-data-jpa-query/src/main/resources/application.properties

@@ -1,2 +1,2 @@
-spring.jpa.show-sql=true
+spring.jpa.show-sql=false
 spring.jpa.defer-datasource-initialization=true

persistence-modules/spring-data-jpa-query/src/test/java/com/baeldung/aggregation/SpringDataAggregateIntegrationTest.java

@@ -16,8 +16,7 @@ import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertThat;
 
 @RunWith(SpringRunner.class)
-@DataJpaTest
-
+@DataJpaTest(showSql = false)
 @Sql(scripts = "/test-aggregation-data.sql")
 public class SpringDataAggregateIntegrationTest {
 

persistence-modules/spring-data-jpa-query/src/test/java/com/baeldung/boot/passenger/PassengerRepositoryIntegrationTest.java

@@ -26,8 +26,7 @@ import static org.hamcrest.core.IsNot.not;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
-
-@DataJpaTest
+@DataJpaTest(showSql = false)
 @RunWith(SpringRunner.class)
 public class PassengerRepositoryIntegrationTest {
 

persistence-modules/spring-data-jpa-query/src/test/java/com/baeldung/entitygraph/EntityGraphIntegrationTest.java

@@ -14,7 +14,7 @@ import com.baeldung.entitygraph.model.Item;
 import com.baeldung.entitygraph.repository.CharacteristicsRepository;
 import com.baeldung.entitygraph.repository.ItemRepository;
 
-@DataJpaTest
+@DataJpaTest(showSql = false)
 @RunWith(SpringRunner.class)
 @Sql(scripts = "/entitygraph-data.sql")
 public class EntityGraphIntegrationTest {

persistence-modules/spring-data-jpa-query/src/test/java/com/baeldung/exists/CarRepositoryIntegrationTest.java

@@ -9,6 +9,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.data.domain.Example;
 import org.springframework.data.domain.ExampleMatcher;
+import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.junit4.SpringRunner;
 
 import java.util.Arrays;

persistence-modules/spring-data-jpa-query/src/test/java/com/baeldung/joins/JpaJoinsIntegrationTest.java

@@ -13,10 +13,11 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
 import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.junit4.SpringRunner;
 
 @RunWith(SpringRunner.class)
-@DataJpaTest
+@DataJpaTest(showSql = false)
 @ActiveProfiles("joins")
 public class JpaJoinsIntegrationTest {
 

persistence-modules/spring-data-jpa-query/src/test/resources/logback-test.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="15 seconds" debug="false">
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%d{ISO8601}]-[%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/saveperformance/BookApplication.java

@@ -1,5 +1,7 @@
 package com.baeldung.spring.data.persistence.saveperformance;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
@@ -12,6 +14,8 @@ import java.util.List;
 @SpringBootApplication
 public class BookApplication {
 
+    private static final Logger LOGGER = LoggerFactory.getLogger(BookApplication.class);
+
     @Autowired
     private BookRepository bookRepository;
 
@@ -25,13 +29,13 @@ public class BookApplication {
         int bookCount = 10000;
 
         long start = System.currentTimeMillis();
-        for(int i = 0; i < bookCount; i++) {
+        for (int i = 0; i < bookCount; i++) {
             bookRepository.save(new Book("Book " + i, "Author " + i));
         }
         long end = System.currentTimeMillis();
         bookRepository.deleteAll();
 
-        System.out.println("It took " + (end - start) + "ms to execute save() for " + bookCount + " books");
+        LOGGER.debug("It took {}ms to execute save() for {} books.", (end - start), bookCount);
 
         List<Book> bookList = new ArrayList<>();
         for (int i = 0; i < bookCount; i++) {
@@ -42,7 +46,7 @@ public class BookApplication {
         bookRepository.saveAll(bookList);
         end = System.currentTimeMillis();
 
-        System.out.println("It took " + (end - start) + "ms to execute saveAll() with " + bookCount + " books\n");
+        LOGGER.debug("It took {}ms to execute saveAll() with {}} books.", (end - start), bookCount);
 
     }
 }

persistence-modules/spring-data-jpa-repo-2/src/test/resources/logback-test.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="15 seconds" debug="false">
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%d{ISO8601}]-[%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

persistence-modules/spring-data-jpa-repo/src/main/resources/application.properties

@@ -1,4 +1,4 @@
-spring.jpa.show-sql=true
+spring.jpa.show-sql=false
 spring.jpa.defer-datasource-initialization=true
 #MySql
 #spring.datasource.url=jdbc:mysql://localhost:3306/baeldung

persistence-modules/spring-data-jpa-repo/src/test/java/com/baeldung/boot/daos/JpaRepositoriesIntegrationTest.java

@@ -21,7 +21,7 @@ import com.baeldung.boot.domain.Location;
 import com.baeldung.boot.domain.Store;
 
 @RunWith(SpringRunner.class)
-@DataJpaTest(properties="spring.sql.init.data-locations=classpath:import_entities.sql")
+@DataJpaTest(properties="spring.sql.init.data-locations=classpath:import_entities.sql", showSql = false)
 public class JpaRepositoriesIntegrationTest {
     @Autowired
     private LocationRepository locationRepository;

persistence-modules/spring-data-jpa-repo/src/test/java/com/baeldung/repository/PassengerRepositoryIntegrationTest.java

@@ -18,7 +18,7 @@ import org.springframework.test.context.junit4.SpringRunner;
 
 import com.baeldung.entity.Passenger;
 
-@DataJpaTest
+@DataJpaTest(showSql = false)
 @RunWith(SpringRunner.class)
 public class PassengerRepositoryIntegrationTest {
 

persistence-modules/spring-data-jpa-repo/src/test/resources/logback-test.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="15 seconds" debug="false">
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%d{ISO8601}]-[%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

persistence-modules/spring-hibernate-5/src/main/java/com/baeldung/hibernate/dynamicupdate/DynamicUpdateConfig.java

@@ -74,7 +74,7 @@ public class DynamicUpdateConfig {
         Properties properties = new Properties();
         properties.setProperty("hibernate.hbm2ddl.auto", Preconditions.checkNotNull(env.getProperty("hibernate.hbm2ddl.auto")));
         properties.setProperty("hibernate.dialect", Preconditions.checkNotNull(env.getProperty("hibernate.dialect")));
-        properties.setProperty("hibernate.show_sql", "true");
+        properties.setProperty("hibernate.show_sql", "false");
         return properties;
     }
 }

persistence-modules/spring-hibernate-5/src/main/java/com/baeldung/hibernate/immutable/util/HibernateUtil.java

@@ -6,8 +6,12 @@ import org.hibernate.SessionFactory;
 import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
 import org.hibernate.cfg.Configuration;
 import org.hibernate.service.ServiceRegistry;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class HibernateUtil {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(HibernateUtil.class);
     private static final SessionFactory sessionFactory = buildSessionFactory();
 
     private static SessionFactory buildSessionFactory() {
@@ -20,7 +24,7 @@ public class HibernateUtil {
             ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
             return configuration.buildSessionFactory(serviceRegistry);
         } catch (Throwable ex) {
-            System.out.println("Initial SessionFactory creation failed." + ex);
+            LOGGER.debug("Initial SessionFactory creation failed.", ex);
             throw new ExceptionInInitializerError(ex);
         }
     }

persistence-modules/spring-hibernate-5/src/main/java/com/baeldung/hibernate/manytomany/util/HibernateUtil.java

@@ -6,8 +6,12 @@ import org.hibernate.cfg.Configuration;
 import org.hibernate.service.ServiceRegistry;
 import com.baeldung.hibernate.manytomany.model.Employee;
 import com.baeldung.hibernate.manytomany.model.Project;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class HibernateUtil {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(HibernateUtil.class);
     private static SessionFactory sessionFactory;
 
     private static SessionFactory buildSessionFactory() {
@@ -17,25 +21,25 @@ public class HibernateUtil {
             configuration.addAnnotatedClass(Employee.class);
             configuration.addAnnotatedClass(Project.class);
             configuration.configure("manytomany.cfg.xml");
-            System.out.println("Hibernate Annotation Configuration loaded");
+            LOGGER.debug("Hibernate Annotation Configuration loaded");
 
             ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties())
-                .build();
-            System.out.println("Hibernate Annotation serviceRegistry created");
+                    .build();
+            LOGGER.debug("Hibernate Annotation serviceRegistry created");
 
             SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);
 
             return sessionFactory;
         } catch (Throwable ex) {
-            System.err.println("Initial SessionFactory creation failed." + ex);
-            ex.printStackTrace();
+            LOGGER.error("Initial SessionFactory creation failed.", ex);
             throw new ExceptionInInitializerError(ex);
         }
     }
 
     public static SessionFactory getSessionFactory() {
-        if (sessionFactory == null)
+        if (sessionFactory == null) {
             sessionFactory = buildSessionFactory();
+        }
         return sessionFactory;
     }
 }