Warum Audit null Version

Question

Mit einem pom wie folgt zurück:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 
    <modelVersion>4.0.0</modelVersion> 
    <groupId>a</groupId> 
    <artifactId>a</artifactId> 
    <version>0.0.1-SNAPSHOT</version> 
    <properties> 
     <exec.mainClass>Test</exec.mainClass> 
    </properties> 
    <dependencies> 
     <dependency> 
      <groupId>org.hibernate</groupId> 
      <artifactId>hibernate-envers</artifactId> 
      <version>4.3.10.Final</version> 
     </dependency> 
     <dependency> 
      <groupId>org.hsqldb</groupId> 
      <artifactId>hsqldb</artifactId> 
      <version>2.3.2</version> 
     </dependency> 
    </dependencies> 
</project> 

und eine Hauptklasse/Einheit wie folgt aus:

import java.util.Calendar; 

import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.Id; 
import javax.persistence.Version; 

import org.hibernate.Session; 
import org.hibernate.SessionFactory; 
import org.hibernate.Transaction; 
import org.hibernate.cfg.Configuration; 
import org.hibernate.cfg.Environment; 
import org.hibernate.dialect.HSQLDialect; 
import org.hibernate.envers.AuditReader; 
import org.hibernate.envers.AuditReaderFactory; 
import org.hibernate.envers.Audited; 
import org.hibernate.internal.SessionFactoryImpl; 

@Entity 
@Audited 
public class Test { 
    @SuppressWarnings("deprecation") 
    public static void main(String[] args) { 
     Configuration c = new Configuration(); 
     c.setProperty(Environment.DIALECT, HSQLDialect.class.getCanonicalName()); 
     c.setProperty(Environment.URL, "jdbc:hsqldb:mem:."); 
     c.setProperty("hibernate.connection.username", "sa"); 
     c.setProperty(Environment.HBM2DDL_AUTO, "create-drop"); 
     c.addAnnotatedClass(Test.class); 
     SessionFactoryImpl sf = (SessionFactoryImpl) c.buildSessionFactory(); 
     Session s = sf.openSession(); 

     Transaction insert = s.beginTransaction(); 
     Test e = new Test(); 
     e.text = "Hello World!"; 
     e.id = 1; 
     s.save(e); 
     s.flush(); 
     System.out.println(e.version.getTimeInMillis()); 
     insert.commit(); 

     Transaction update = s.beginTransaction(); 
     e.text = "Foobar"; 
     s.persist(e); 
     s.flush(); 
     System.out.println(e.version.getTimeInMillis()); 
     update.commit(); 

     AuditReader r = AuditReaderFactory.get(s); 
     System.out.println(r.find(Test.class, e.id, 1).version); 
     System.out.println(r.find(Test.class, e.id, 2).version); 

     sf.getServiceRegistry().destroy(); 
    } 

    @Id 
    Integer id; 

    @Version 
    Calendar version; 

    @Column 
    String text; 
} 

ich diese Ausgabe:

[INFO] Scanning for projects... 
[INFO] 
[INFO] ------------------------------------------------------------------------ 
[INFO] Building a 0.0.1-SNAPSHOT 
[INFO] ------------------------------------------------------------------------ 
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ a --- 
[INFO] Deleting C:\Users\devel\workspace\a\target 
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ a --- 
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! 
[INFO] skip non existing resourceDirectory C:\Users\devel\workspace\a\src\main\resources 
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ a --- 
[INFO] Changes detected - recompiling the module! 
[WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. build is platform dependent! 
[INFO] Compiling 1 source file to C:\Users\devel\workspace\a\target\classes 
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ a --- 
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! 
[INFO] skip non existing resourceDirectory C:\Users\devel\workspace\a\src\test\resources 
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ a --- 
[INFO] No sources to compile 
[INFO] 
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ a --- 
[INFO] No tests to run. 
[INFO] 
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ a --- 
[INFO] Building jar: C:\Users\devel\workspace\a\target\a-0.0.1-SNAPSHOT.jar 
[INFO] 
[INFO] --- maven-install-plugin:2.4:install (default-install) @ a --- 
[INFO] Installing C:\Users\devel\workspace\a\target\a-0.0.1-SNAPSHOT.jar to C:\Users\devel\.m2\repository\a\a\0.0.1-SNAPSHOT\a-0.0.1-SNAPSHOT.jar 
[INFO] Installing C:\Users\devel\workspace\a\pom.xml to C:\Users\devel\.m2\repository\a\a\0.0.1-SNAPSHOT\a-0.0.1-SNAPSHOT.pom 
[INFO] 
[INFO] --- exec-maven-plugin:1.6.0:java (default-cli) @ a --- 
Mai 28, 2017 11:27:06 AM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit> 
INFO: HCANN000001: Hibernate Commons Annotations {4.0.5.Final} 
Mai 28, 2017 11:27:06 AM org.hibernate.Version logVersion 
INFO: HHH000412: Hibernate Core {4.3.10.Final} 
Mai 28, 2017 11:27:06 AM org.hibernate.cfg.Environment <clinit> 
INFO: HHH000206: hibernate.properties not found 
Mai 28, 2017 11:27:06 AM org.hibernate.cfg.Environment buildBytecodeProvider 
INFO: HHH000021: Bytecode provider name : javassist 
Mai 28, 2017 11:27:06 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure 
WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!) 
Mai 28, 2017 11:27:06 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator 
INFO: HHH000401: using driver [null] at URL [jdbc:hsqldb:mem:.] 
Mai 28, 2017 11:27:06 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator 
INFO: HHH000046: Connection properties: {user=sa} 
Mai 28, 2017 11:27:06 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator 
INFO: HHH000006: Autocommit mode: false 
Mai 28, 2017 11:27:06 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure 
INFO: HHH000115: Hibernate connection pool size: 20 (min=1) 
Mai 28, 2017 11:27:06 AM org.hibernate.dialect.Dialect <init> 
INFO: HHH000400: Using dialect: org.hibernate.dialect.HSQLDialect 
Mai 28, 2017 11:27:06 AM org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService 
INFO: HHH000399: Using default transaction strategy (direct JDBC transactions) 
Mai 28, 2017 11:27:06 AM org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init> 
INFO: HHH000397: Using ASTQueryTranslatorFactory 
Mai 28, 2017 11:27:07 AM org.hibernate.tool.hbm2ddl.SchemaExport execute 
INFO: HHH000227: Running hbm2ddl schema export 
Mai 28, 2017 11:27:07 AM org.hibernate.tool.hbm2ddl.SchemaExport perform 
ERROR: HHH000389: Unsuccessful: alter table Test_AUD drop constraint FK_p3jg7xwj0p2hij6o3otnb60uj 
Mai 28, 2017 11:27:07 AM org.hibernate.tool.hbm2ddl.SchemaExport perform 
ERROR: user lacks privilege or object not found: PUBLIC.TEST_AUD 
Mai 28, 2017 11:27:07 AM org.hibernate.tool.hbm2ddl.SchemaExport execute 
INFO: HHH000230: Schema export complete 
1495963627299 
1495963627315 
null 
null 
Mai 28, 2017 11:27:07 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop 
INFO: HHH000030: Cleaning up connection pool [jdbc:hsqldb:mem:.] 
[INFO] ------------------------------------------------------------------------ 
[INFO] BUILD SUCCESS 
[INFO] ------------------------------------------------------------------------ 
[INFO] Total time: 2.438 s 
[INFO] Finished at: 2017-05-28T11:27:07+02:00 
[INFO] Final Memory: 27M/435M 
[INFO] ------------------------------------------------------------------------ 

Warum ist das Versionsfeld in alten Revisionen leer?

Answer 1

Dies wird aufgrund von org.hibernate.envers.do_not_audit_optimistic_locking_field erwartet.

Envers setzt dieses propety auf true standardmäßig und damit alle kommentierten @Version Eigenschaften eines Unternehmen wird nicht geprüft werden kann, wird nicht in der Audit-Tabelle Schema aufgenommen werden und wird daher null sein, wenn Sie -abschlussprüfungsgesellschaften aus dem Abruf Envers Geschichte Tabellen.

Wenn Sie möchten, dass die @Version annotierten Felder ebenfalls überwacht werden, ändern Sie die angegebene Eigenschaft in Ihrer Ruhezustandskonfiguration in false. Dies bedeutet jedoch, dass eine Schemaaktualisierung erforderlich ist und Ihre alten Verlaufsdatensätze weiterhin Nullwerte melden.