Fixes for Hibernate 6 support

dao/src/main/java/org/thingsboard/server/dao/model/BaseSqlEntity.java

@@ -21,14 +21,13 @@ import jakarta.persistence.Id;
 import jakarta.persistence.MappedSuperclass;
 import lombok.Data;
 import org.apache.commons.lang3.StringUtils;
-import org.hibernate.annotations.UuidGenerator;
 import org.thingsboard.common.util.JacksonUtil;
 import org.thingsboard.server.common.data.BaseData;
 import org.thingsboard.server.common.data.id.EntityId;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.id.UUIDBased;
 import org.thingsboard.server.dao.DaoUtil;
-import org.thingsboard.server.dao.sql.IdGenerator;
+import org.thingsboard.server.dao.sql.IdGenerator.GeneratedId;
 
 import java.util.Arrays;
 import java.util.Collections;
@@ -46,7 +45,7 @@ public abstract class BaseSqlEntity<D> implements BaseEntity<D> {
 
     @Id
     @Column(name = ModelConstants.ID_PROPERTY, columnDefinition = "uuid")
-    @UuidGenerator(style = UuidGenerator.Style.AUTO, algorithm = IdGenerator.class)
+    @GeneratedId
     protected UUID id;
 
     @Column(name = ModelConstants.CREATED_TIME_PROPERTY, updatable = false)

dao/src/main/java/org/thingsboard/server/dao/sql/IdGenerator.java

@@ -17,17 +17,44 @@ package org.thingsboard.server.dao.sql;
 
 import com.datastax.oss.driver.api.core.uuid.Uuids;
 import lombok.extern.slf4j.Slf4j;
+import org.hibernate.annotations.IdGeneratorType;
 import org.hibernate.engine.spi.SharedSessionContractImplementor;
-import org.hibernate.id.uuid.UuidValueGenerator;
+import org.hibernate.generator.BeforeExecutionGenerator;
+import org.hibernate.generator.EventType;
+import org.hibernate.generator.EventTypeSets;
+import org.thingsboard.server.dao.model.BaseEntity;
 
-import java.util.UUID;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.util.EnumSet;
 
 @Slf4j
-public class IdGenerator implements UuidValueGenerator {
+public class IdGenerator implements BeforeExecutionGenerator {
 
     @Override
-    public UUID generateUuid(SharedSessionContractImplementor session) {
+    public Object generate(SharedSessionContractImplementor session, Object owner, Object currentValue, EventType eventType) {
+        if (owner instanceof BaseEntity<?> entity && entity.getUuid() != null) {
+            return entity.getUuid();
+        }
         return Uuids.timeBased();
     }
 
+    @Override
+    public boolean allowAssignedIdentifiers() {
+        return true;
+    }
+
+    @Override
+    public EnumSet<EventType> getEventTypes() {
+        return EventTypeSets.INSERT_ONLY;
+    }
+
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target(ElementType.FIELD)
+    @IdGeneratorType(IdGenerator.class)
+    public @interface GeneratedId {
+    }
+
 }

dao/src/main/java/org/thingsboard/server/dao/sql/JpaAbstractDao.java

@@ -15,12 +15,14 @@
  */
 package org.thingsboard.server.dao.sql;
 
+import com.datastax.oss.driver.api.core.uuid.Uuids;
 import com.google.common.collect.Lists;
 import com.google.common.util.concurrent.ListenableFuture;
 import jakarta.persistence.EntityManager;
 import jakarta.persistence.OptimisticLockException;
 import jakarta.persistence.PersistenceContext;
 import lombok.extern.slf4j.Slf4j;
+import org.hibernate.Session;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.jdbc.core.JdbcTemplate;
@@ -69,6 +71,14 @@ public abstract class JpaAbstractDao<E extends BaseEntity<D>, D>
         boolean isNew = entity.getUuid() == null;
         if (isNew) {
             entity.setCreatedTime(System.currentTimeMillis());
+        } else {
+            if (entity.getCreatedTime() == 0) {
+                if (entity.getUuid().version() == 1) {
+                    entity.setCreatedTime(Uuids.unixTimestamp(entity.getUuid()));
+                } else {
+                    entity.setCreatedTime(System.currentTimeMillis());
+                }
+            }
         }
         try {
             entity = doSave(entity, isNew, flush);
@@ -82,33 +92,9 @@ public abstract class JpaAbstractDao<E extends BaseEntity<D>, D>
         boolean flushed = false;
         EntityManager entityManager = getEntityManager();
         if (isNew) {
-            entityManager.persist(entity);
-            if (entity instanceof HasVersion versionedEntity) {
-                versionedEntity.setVersion(1L);
-            }
+            entity = create(entity);
         } else {
-            if (entity instanceof HasVersion versionedEntity) {
-                if (versionedEntity.getVersion() == null) {
-                    HasVersion existingEntity = entityManager.find(versionedEntity.getClass(), entity.getUuid());
-                    if (existingEntity != null) {
-                        /*
-                         * manually resetting the version to latest to allow force overwrite of the entity
-                         * */
-                        versionedEntity.setVersion(existingEntity.getVersion());
-                    } else {
-                        return doSave(entity, true, flush);
-                    }
-                }
-                versionedEntity = entityManager.merge(versionedEntity);
-                entity = (E) versionedEntity;
-                /*
-                 * by default, Hibernate doesn't issue an update query and thus version increment
-                 * if the entity was not modified. to bypass this and always increment the version, we do it manually
-                 * */
-                versionedEntity.setVersion(versionedEntity.getVersion() + 1);
-            } else {
-                entity = entityManager.merge(entity);
-            }
+            entity = update(entity);
         }
         if (entity instanceof HasVersion versionedEntity) {
             /*
@@ -125,6 +111,53 @@ public abstract class JpaAbstractDao<E extends BaseEntity<D>, D>
         return entity;
     }
 
+    private E create(E entity) {
+        if (entity instanceof HasVersion versionedEntity) {
+            versionedEntity.setVersion(1L);
+        }
+        if (entity.getUuid() == null) {
+            getEntityManager().persist(entity);
+        } else {
+            if (entity instanceof HasVersion) {
+                /*
+                 * Hibernate 6 does not allow creating versioned entities with preset IDs.
+                 * Bypassing by calling the underlying session directly
+                 * */
+                Session session = getEntityManager().unwrap(Session.class);
+                session.save(entity);
+            } else {
+                entity = getEntityManager().merge(entity);
+            }
+        }
+        return entity;
+    }
+
+    private E update(E entity) {
+        if (entity instanceof HasVersion versionedEntity) {
+            if (versionedEntity.getVersion() == null) {
+                HasVersion existingEntity = entityManager.find(versionedEntity.getClass(), entity.getUuid());
+                if (existingEntity != null) {
+                    /*
+                     * manually resetting the version to latest to allow force overwriting of the entity
+                     * */
+                    versionedEntity.setVersion(existingEntity.getVersion());
+                } else {
+                    return create(entity);
+                }
+            }
+            versionedEntity = entityManager.merge(versionedEntity);
+            entity = (E) versionedEntity;
+            /*
+             * by default, Hibernate doesn't issue an update query and thus version increment
+             * if the entity was not modified. to bypass this and always increment the version, we do it manually
+             * */
+            versionedEntity.setVersion(versionedEntity.getVersion() + 1);
+        } else {
+            entity = entityManager.merge(entity);
+        }
+        return entity;
+    }
+
     @Override
     @Transactional
     public D saveAndFlush(TenantId tenantId, D domain) {