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Ich war mit Hibernate 3, jetzt bin ich auf Hibernate 5 migrieren, und einige Probleme aufgetreten (natürlich)."konnte Leser nicht zurücksetzen" beim Speichern von BLOB
Ich habe mehrere DAO-Objekte, die über Hibernate gespeichert werden, und einige von ihnen haben Parameter/Feld/Spalte "geändert", die bei jedem Speichern/Aktualisieren in Hibernate automatisch auf die aktuelle Zeit aktualisiert wird.
Dies ist einfach DAO:
@Entity
@Table(name="attachments")
@SequenceGenerator(name="common_attachments_seq", sequenceName="common_attachments_seq", allocationSize=1)
public class AttachmentDAO implements Modifications {
private Long id;
private String name;
private Blob content;
private Date modified;
public AttachmentDAO() {}
@Id
@GeneratedValue(strategy=GenerationType.AUTO, generator="common_attachments_seq")
@Column(updatable = false, nullable = false)
public Long getId() {return this.id;}
public void setId(Long id) {this.id=id;}
@Column
public String getName() {return this.name;}
public void setName(String name) {this.name=name;}
@Column
public Blob getContent() {return this.content;}
public void setContent(Blob content) {this.content=content;}
@Column
public Date getModified() {return modified;}
public void setModified(Date date) {modified=date;}
}
Dies ist Integrator, Modifikationen Zuhörers setzt:
public class HibernateIntegrator implements Integrator {
@Override
public void integrate(Metadata metadata, SessionFactoryImplementor sessionFactory, SessionFactoryServiceRegistry serviceRegistry) {
EventListenerRegistry eventListenerRegistry=serviceRegistry.getService(EventListenerRegistry.class);
ModificationsEventListener mod=new ModificationsEventListener();
eventListenerRegistry.appendListeners(EventType.UPDATE, mod);
eventListenerRegistry.appendListeners(EventType.SAVE, mod);
eventListenerRegistry.appendListeners(EventType.SAVE_UPDATE, mod);
}
@Override
public void disintegrate(SessionFactoryImplementor sessionFactory, SessionFactoryServiceRegistry serviceRegistry) {
}
}
Dies ist ModificationsEventListener die "modifizierte" tatsächlich Updates Parameter:
public class ModificationsEventListener extends DefaultSaveOrUpdateEventListener {
@Override
public void onSaveOrUpdate(SaveOrUpdateEvent event) throws HibernateException {
Object o=event.getObject();
if (o instanceof Modifications) {
Date now=new Date();
Modifications doc=((Modifications)o);
doc.setModified(now);
}
super.onSaveOrUpdate(event);
}
}
Diese ist der Code, der DAO speichert:
// DiskFileItem currentFile = file uploaded to server - Apache's commons-fileupload-1.3.2.jar
Session hibSession=null;
Transaction tx=null;
try {
SessionFactory sf=AttachmentsSessionFactory.getSessionFactory();
hibSession=sf.openSession();
tx=hibSession.beginTransaction();
AttachmentDAO stub=new AttachmentDAO();
stub.setName(fileName);
long length=currentFile.getSize();
InputStream ins=currentFile.getInputStream(); // this is FileInputStream
LobCreator lobs=Hibernate.getLobCreator(hibSession);
Blob blob=lobs.createBlob(ins, length);
stub.setContent(blob);
hibSession.save(stub);
tx.commit();
ins.close();
currentFile.delete();
} catch (Exception ex) {
if (tx!=null) tx.rollback();
log.error("", ex);
} finally {
if (hibSession!=null&&hibSession.isOpen()) {
hibSession.close();
}
hibSession=null;
}
Aber dieser Code löst Fehler:
2017-05-12 11:20:38,253 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-127) could not reset reader
2017-05-12 11:20:38,254 ERROR [org.hibernate.internal.SessionImpl] (default task-127) HHH000346: Error during managed flush [could not update: [com.test.persistence.AttachmentDAO#38]]
2017-05-12 11:20:38,267 ERROR [com.gibon.qintegra.servlets.upload.AttachmentsUploadProgressListener] (default task-127) : org.hibernate.exception.GenericJDBCException: could not update: [com.gibon.qintegra.persistence.common.AttachmentDAO#38]
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:109)
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3111)
at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2961)
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3341)
at org.hibernate.action.internal.EntityUpdateAction.execute(EntityUpdateAction.java:145)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:582)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:456)
at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:337)
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39)
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1282)
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:465)
at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:2963)
at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2339)
at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:485)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:147)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$100(JdbcResourceLocalTransactionCoordinatorImpl.java:38)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:231)
at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:65)
at com.gibon.qintegra.servlets.upload.AttachmentsUploadProgressListener.currentFileFinished(AttachmentsUploadProgressListener.java:138)
at com.gibon.qintegra.data4ajax.AttachmentsServant.doServe(AttachmentsServant.java:255)
at com.gibon.qintegra.servlets.Data4Ajax.doProcess(Data4Ajax.java:74)
at com.gibon.qintegra.servlets.Data4Ajax.doPost(Data4Ajax.java:24)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
at com.gibon.qintegra.filters.IECompatFilter.doFilter(IECompatFilter.java:44)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at com.gibon.qintegra.filters.SecurityFilter.doFilter(SecurityFilter.java:89)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:805)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.sql.SQLException: could not reset reader
at org.hibernate.engine.jdbc.BlobProxy.resetIfNeeded(BlobProxy.java:75)
at org.hibernate.engine.jdbc.BlobProxy.getUnderlyingStream(BlobProxy.java:64)
at org.hibernate.engine.jdbc.BlobProxy.getStream(BlobProxy.java:60)
at org.hibernate.engine.jdbc.BlobProxy.invoke(BlobProxy.java:101)
at com.sun.proxy.$Proxy118.getBinaryStream(Unknown Source)
at org.postgresql.jdbc.PgPreparedStatement.setBlob(PgPreparedStatement.java:1154)
at org.jboss.jca.adapters.jdbc.WrappedPreparedStatement.setBlob(WrappedPreparedStatement.java:1157)
at org.hibernate.type.descriptor.sql.BlobTypeDescriptor$4$1.doBind(BlobTypeDescriptor.java:132)
at org.hibernate.type.descriptor.sql.BasicBinder.bind(BasicBinder.java:74)
at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:257)
at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:252)
at org.hibernate.type.AbstractSingleColumnStandardBasicType.nullSafeSet(AbstractSingleColumnStandardBasicType.java:39)
at org.hibernate.persister.entity.AbstractEntityPersister.dehydrate(AbstractEntityPersister.java:2609)
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3038)
... 67 more
SQL, die ausgeführt wird überwintern, ist dies:
Hibernate:
select
nextval ('common_attachments_seq')
Hibernate:
insert
into
sys_attachments
(content, modified, name, id)
values
(?, ?, ?, ?)
Hibernate:
update
sys_attachments
set
content=?,
modified=?,
name=?,
where
id=?
Anscheinend Problem ist, dass Hibernate Datensatz einfügt und direkt danach macht Update. FileInputStream mag es nicht, weil es direkt nach dem Einfügen geschlossen wird.
Wenn ich den Integrator deaktiviere (das "geänderte" Feld aktualisiere), funktioniert es OK.
Gibt es eine Möglichkeit, wie es funktioniert?