Examples with UnionSubclassEntityPersister org.hibernate.persister.entity.UnionSubclassEntityPersister used on opensource projects

Example 1 with UnionSubclassEntityPersister

use of org.hibernate.persister.entity.UnionSubclassEntityPersister in project hibernate-orm by hibernate.

the class ValidityAuditStrategy method perform.

@Override
public void perform(final Session session, final String entityName, final AuditEntitiesConfiguration audEntitiesCfg, final Serializable id, final Object data, final Object revision) {
    final String auditedEntityName = audEntitiesCfg.getAuditEntityName(entityName);
    final String revisionInfoEntityName = audEntitiesCfg.getRevisionInfoEntityName();
    // Save the audit data
    session.save(auditedEntityName, data);
    // Update the end date of the previous row.
    //
    // When application reuses identifiers of previously removed entities:
    // The UPDATE statement will no-op if an entity with a given identifier has been
    // inserted for the first time. But in case a deleted primary key value was
    // reused, this guarantees correct strategy behavior: exactly one row with
    // null end date exists for each identifier.
    final boolean reuseEntityIdentifier = audEntitiesCfg.getEnversService().getGlobalConfiguration().isAllowIdentifierReuse();
    if (reuseEntityIdentifier || getRevisionType(audEntitiesCfg, data) != RevisionType.ADD) {
        // Register transaction completion process to guarantee execution of UPDATE statement afterQuery INSERT.
        ((EventSource) session).getActionQueue().registerProcess(new BeforeTransactionCompletionProcess() {

            @Override
            public void doBeforeTransactionCompletion(final SessionImplementor sessionImplementor) {
                final Queryable productionEntityQueryable = getQueryable(entityName, sessionImplementor);
                final Queryable rootProductionEntityQueryable = getQueryable(productionEntityQueryable.getRootEntityName(), sessionImplementor);
                final Queryable auditedEntityQueryable = getQueryable(auditedEntityName, sessionImplementor);
                final Queryable rootAuditedEntityQueryable = getQueryable(auditedEntityQueryable.getRootEntityName(), sessionImplementor);
                final String updateTableName;
                if (UnionSubclassEntityPersister.class.isInstance(rootProductionEntityQueryable)) {
                    // this is the condition causing all the problems in terms of the generated SQL UPDATE
                    // the problem being that we currently try to update the in-line view made up of the union query
                    //
                    // this is extremely hacky means to get the root table name for the union subclass style entities.
                    // hacky because it relies on internal behavior of UnionSubclassEntityPersister
                    // !!!!!! NOTICE - using subclass persister, not root !!!!!!
                    updateTableName = auditedEntityQueryable.getSubclassTableName(0);
                } else {
                    updateTableName = rootAuditedEntityQueryable.getTableName();
                }
                final Type revisionInfoIdType = sessionImplementor.getFactory().getMetamodel().entityPersister(revisionInfoEntityName).getIdentifierType();
                final String revEndColumnName = rootAuditedEntityQueryable.toColumns(audEntitiesCfg.getRevisionEndFieldName())[0];
                final boolean isRevisionEndTimestampEnabled = audEntitiesCfg.isRevisionEndTimestampEnabled();
                // update audit_ent set REVEND = ? [, REVEND_TSTMP = ?] where (prod_ent_id) = ? and REV <> ? and REVEND is null
                final Update update = new Update(sessionImplementor.getFactory().getJdbcServices().getDialect()).setTableName(updateTableName);
                // set REVEND = ?
                update.addColumn(revEndColumnName);
                // set [, REVEND_TSTMP = ?]
                if (isRevisionEndTimestampEnabled) {
                    update.addColumn(rootAuditedEntityQueryable.toColumns(audEntitiesCfg.getRevisionEndTimestampFieldName())[0]);
                }
                // where (prod_ent_id) = ?
                update.addPrimaryKeyColumns(rootProductionEntityQueryable.getIdentifierColumnNames());
                // where REV <> ?
                update.addWhereColumn(rootAuditedEntityQueryable.toColumns(audEntitiesCfg.getRevisionNumberPath())[0], "<> ?");
                // where REVEND is null
                update.addWhereColumn(revEndColumnName, " is null");
                // Now lets execute the sql...
                final String updateSql = update.toStatementString();
                int rowCount = sessionImplementor.doReturningWork(new ReturningWork<Integer>() {

                    @Override
                    public Integer execute(Connection connection) throws SQLException {
                        PreparedStatement preparedStatement = sessionImplementor.getJdbcCoordinator().getStatementPreparer().prepareStatement(updateSql);
                        try {
                            int index = 1;
                            // set REVEND = ?
                            final Number revisionNumber = audEntitiesCfg.getEnversService().getRevisionInfoNumberReader().getRevisionNumber(revision);
                            revisionInfoIdType.nullSafeSet(preparedStatement, revisionNumber, index, sessionImplementor);
                            index += revisionInfoIdType.getColumnSpan(sessionImplementor.getFactory());
                            // set [, REVEND_TSTMP = ?]
                            if (isRevisionEndTimestampEnabled) {
                                final Object revEndTimestampObj = revisionTimestampGetter.get(revision);
                                final Date revisionEndTimestamp = convertRevEndTimestampToDate(revEndTimestampObj);
                                final Type revEndTsType = rootAuditedEntityQueryable.getPropertyType(audEntitiesCfg.getRevisionEndTimestampFieldName());
                                revEndTsType.nullSafeSet(preparedStatement, revisionEndTimestamp, index, sessionImplementor);
                                index += revEndTsType.getColumnSpan(sessionImplementor.getFactory());
                            }
                            // where (prod_ent_id) = ?
                            final Type idType = rootProductionEntityQueryable.getIdentifierType();
                            idType.nullSafeSet(preparedStatement, id, index, sessionImplementor);
                            index += idType.getColumnSpan(sessionImplementor.getFactory());
                            // where REV <> ?
                            final Type revType = rootAuditedEntityQueryable.getPropertyType(audEntitiesCfg.getRevisionNumberPath());
                            revType.nullSafeSet(preparedStatement, revisionNumber, index, sessionImplementor);
                            return sessionImplementor.getJdbcCoordinator().getResultSetReturn().executeUpdate(preparedStatement);
                        } finally {
                            sessionImplementor.getJdbcCoordinator().getLogicalConnection().getResourceRegistry().release(preparedStatement);
                            sessionImplementor.getJdbcCoordinator().afterStatementExecution();
                        }
                    }
                });
                if (rowCount != 1 && (!reuseEntityIdentifier || (getRevisionType(audEntitiesCfg, data) != RevisionType.ADD))) {
                    throw new RuntimeException("Cannot update previous revision for entity " + auditedEntityName + " and id " + id);
                }
            }
        });
    }
    sessionCacheCleaner.scheduleAuditDataRemoval(session, data);
}