예제 #1
0
  /**
   * delete all of the objects as a single transaction. This should delete the object in the correct
   * order to maintain referential integrity.
   */
  public void deleteAllObjects(List objects)
      throws RuntimeException, DatabaseException, OptimisticLockException {
    this.isActive = true;
    AbstractSession session = getSession();
    session.beginTransaction();

    try {
      // PERF: Optimize single object case.
      if (objects.size() == 1) {
        deleteAllObjects(objects.get(0).getClass(), objects, session);
      } else {
        List commitOrder = getCommitOrder();
        for (int orderIndex = commitOrder.size() - 1; orderIndex >= 0; orderIndex--) {
          Class theClass = (Class) commitOrder.get(orderIndex);
          deleteAllObjects(theClass, objects, session);
        }
      }

      session.commitTransaction();
    } catch (RuntimeException exception) {
      try {
        session.rollbackTransaction();
      } catch (Exception ignore) {
      }
      throw exception;
    } finally {
      reinitialize();
      this.isActive = false;
    }
  }
예제 #2
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  /** Delete all of the objects with the matching class. */
  public void deleteAllObjects(Class theClass, List objects, AbstractSession session) {
    ClassDescriptor descriptor = null;

    if (((UnitOfWorkImpl) session).shouldOrderUpdates()) { // bug 331064 - Sort the delete order
      objects = sort(theClass, objects);
    }

    int size = objects.size();
    for (int index = 0; index < size; index++) {
      Object objectToDelete = objects.get(index);
      if (objectToDelete.getClass() == theClass) {
        if (descriptor == null) {
          descriptor = session.getDescriptor(theClass);
        }
        // PERF: Get the descriptor query, to avoid extra query creation.
        DeleteObjectQuery deleteQuery = descriptor.getQueryManager().getDeleteQuery();
        if (deleteQuery == null) {
          deleteQuery = new DeleteObjectQuery();
          deleteQuery.setDescriptor(descriptor);
        } else {
          // Ensure original query has been prepared.
          deleteQuery.checkPrepare(session, deleteQuery.getTranslationRow());
          deleteQuery = (DeleteObjectQuery) deleteQuery.clone();
        }
        deleteQuery.setIsExecutionClone(true);
        deleteQuery.setObject(objectToDelete);
        session.executeQuery(deleteQuery);
      }
    }
  }
예제 #3
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 /**
  * Commit all of the objects of the class type in the change set. This allows for the order of the
  * classes to be processed optimally.
  */
 protected void commitNewObjectsForClassWithChangeSet(
     UnitOfWorkChangeSet uowChangeSet, Class theClass) {
   Map<ObjectChangeSet, ObjectChangeSet> newObjectChangesList =
       uowChangeSet.getNewObjectChangeSets().get(theClass);
   if (newObjectChangesList != null) { // may be no changes for that class type.
     AbstractSession session = getSession();
     ClassDescriptor descriptor = session.getDescriptor(theClass);
     List<ObjectChangeSet> newChangeSets = new ArrayList(newObjectChangesList.values());
     int size = newChangeSets.size();
     for (int index = 0; index < size; index++) {
       ObjectChangeSet changeSetToWrite = newChangeSets.get(index);
       Object objectToWrite = changeSetToWrite.getUnitOfWorkClone();
       if (!isProcessedCommit(objectToWrite)) {
         // PERF: Get the descriptor query, to avoid extra query creation.
         InsertObjectQuery commitQuery = descriptor.getQueryManager().getInsertQuery();
         if (commitQuery == null) {
           commitQuery = new InsertObjectQuery();
           commitQuery.setDescriptor(descriptor);
         } else {
           // Ensure original query has been prepared.
           commitQuery.checkPrepare(session, commitQuery.getTranslationRow());
           commitQuery = (InsertObjectQuery) commitQuery.clone();
         }
         commitQuery.setIsExecutionClone(true);
         commitQuery.setObjectChangeSet(changeSetToWrite);
         commitQuery.setObject(objectToWrite);
         commitQuery.cascadeOnlyDependentParts();
         commitQuery.setModifyRow(null);
         session.executeQuery(commitQuery);
       }
       uowChangeSet.putNewObjectInChangesList(changeSetToWrite, session);
     }
   }
 }
예제 #4
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  /**
   * INTERNAL: Execute the query. Get the rows and build the object from the rows.
   *
   * @exception DatabaseException - an error has occurred on the database
   * @return java.lang.Object collection of objects resulting from execution of query.
   */
  protected Object executeObjectLevelReadQuery() throws DatabaseException {
    Object result = null;

    if (getContainerPolicy().overridesRead()) {
      return getContainerPolicy().execute();
    }

    if (this.descriptor.isDescriptorForInterface()) {
      Object returnValue =
          this.descriptor.getInterfacePolicy().selectAllObjectsUsingMultipleTableSubclassRead(this);
      setExecutionTime(System.currentTimeMillis());
      return returnValue;
    }

    List rows = getQueryMechanism().selectAllRows();
    setExecutionTime(System.currentTimeMillis());

    // If using 1-m joins, must set all rows.
    if (hasJoining() && this.joinedAttributeManager.isToManyJoin()) {
      this.joinedAttributeManager.setDataResults(rows, this.session);
    }

    if (this.session.isUnitOfWork()) {
      result =
          registerResultInUnitOfWork(
              rows, (UnitOfWorkImpl) this.session, this.translationRow, true); //
    } else {
      result = getContainerPolicy().containerInstance(rows.size());
      this.descriptor.getObjectBuilder().buildObjectsInto(this, rows, result);
    }

    if (this.shouldIncludeData) {
      ComplexQueryResult complexResult = new ComplexQueryResult();
      complexResult.setResult(result);
      complexResult.setData(rows);
      return complexResult;
    }

    // Add the other (already registered) results and return them.
    if (getDescriptor().hasTablePerClassPolicy()) {
      result =
          containerPolicy.concatenateContainers(
              result,
              getDescriptor()
                  .getTablePerClassPolicy()
                  .selectAllObjectsUsingMultipleTableSubclassRead(this));
    }

    return result;
  }
 public List<Expression> copyDerivedExpressions(Map alreadyDone) {
   if (this.derivedExpressions == null) {
     return null;
   }
   List<Expression> derivedExpressionsCopy;
   synchronized (this) {
     derivedExpressionsCopy = new ArrayList(this.derivedExpressions);
   }
   List<Expression> result = new ArrayList(derivedExpressionsCopy.size());
   for (Expression exp : derivedExpressionsCopy) {
     result.add(exp.copiedVersionFrom(alreadyDone));
   }
   return result;
 }
예제 #6
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 // bug 331064 - Sort the delete order based on PKs.
 private List sort(Class theClass, List objects) {
   ClassDescriptor descriptor = session.getDescriptor(theClass);
   org.eclipse.persistence.internal.descriptors.ObjectBuilder objectBuilder =
       descriptor.getObjectBuilder();
   int size = objects.size();
   TreeMap sortedObjects = new TreeMap();
   for (int index = 0; index < size; index++) {
     Object objectToDelete = objects.get(index);
     if (objectToDelete.getClass() == theClass) {
       sortedObjects.put(
           objectBuilder.extractPrimaryKeyFromObject(objectToDelete, session), objectToDelete);
     }
   }
   return new ArrayList(sortedObjects.values());
 }
예제 #7
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 /** INTERNAL: Build the result value for the row. */
 public Object buildObject(AbstractRecord row) {
   if (this.resultType == AUTO) {
     List values = row.getValues();
     if (values.size() == 1) {
       return row.getValues().get(0);
     } else {
       return row.getValues().toArray();
     }
   } else if (this.resultType == ARRAY) {
     return row.getValues().toArray();
   } else if (this.resultType == ATTRIBUTE) {
     // Use get with field for XML records.
     Object value = row.get(row.getFields().get(0));
     if (getValueConverter() != null) {
       value = getValueConverter().convertDataValueToObjectValue(value, this.session);
     }
     return value;
   }
   return row;
 }
  /**
   * INTERNAL: Used in case outer joins should be printed in FROM clause. Each of the additional
   * tables mapped to expressions that joins it.
   */
  public Map additionalExpressionCriteriaMap() {
    if (getDescriptor() == null) {
      return null;
    }

    HashMap tablesJoinExpressions = new HashMap();
    Vector tables = getDescriptor().getTables();
    // skip the main table - start with i=1
    int tablesSize = tables.size();
    if (shouldUseOuterJoin()) {
      for (int i = 1; i < tablesSize; i++) {
        DatabaseTable table = (DatabaseTable) tables.elementAt(i);
        Expression joinExpression =
            (Expression) getDescriptor().getQueryManager().getTablesJoinExpressions().get(table);
        joinExpression = getBaseExpression().twist(joinExpression, this);
        tablesJoinExpressions.put(table, joinExpression);
      }
    }
    if (isUsingOuterJoinForMultitableInheritance()) {
      List childrenTables = getDescriptor().getInheritancePolicy().getChildrenTables();
      tablesSize = childrenTables.size();
      for (int i = 0; i < tablesSize; i++) {
        DatabaseTable table = (DatabaseTable) childrenTables.get(i);
        Expression joinExpression =
            (Expression)
                getDescriptor()
                    .getInheritancePolicy()
                    .getChildrenTablesJoinExpressions()
                    .get(table);
        joinExpression = getBaseExpression().twist(joinExpression, this);
        tablesJoinExpressions.put(table, joinExpression);
      }
    }

    return tablesJoinExpressions;
  }
  /**
   * INTERNAL: Used in case outer joins should be printed in FROM clause. Each of the additional
   * tables mapped to expressions that joins it.
   */
  public Map additionalExpressionCriteriaMap() {
    if (getDescriptor() == null) {
      return null;
    }

    HashMap tablesJoinExpressions = null;
    if (isUsingOuterJoinForMultitableInheritance()) {
      tablesJoinExpressions = new HashMap();
      List childrenTables = getDescriptor().getInheritancePolicy().getChildrenTables();
      for (int i = 0; i < childrenTables.size(); i++) {
        DatabaseTable table = (DatabaseTable) childrenTables.get(i);
        Expression joinExpression =
            getDescriptor().getInheritancePolicy().getChildrenTablesJoinExpressions().get(table);
        if (getBaseExpression() != null) {
          joinExpression = getBaseExpression().twist(joinExpression, this);
        } else {
          joinExpression = twist(joinExpression, this);
        }
        tablesJoinExpressions.put(table, joinExpression);
      }
    }

    return tablesJoinExpressions;
  }
예제 #10
0
  /**
   * INTERNAL: All objects queried via a UnitOfWork get registered here. If the query went to the
   * database.
   *
   * <p>Involves registering the query result individually and in totality, and hence refreshing /
   * conforming is done here.
   *
   * @param result may be collection (read all) or an object (read one), or even a cursor. If in
   *     transaction the shared cache will be bypassed, meaning the result may not be originals from
   *     the parent but raw database rows.
   * @param unitOfWork the unitOfWork the result is being registered in.
   * @param arguments the original arguments/parameters passed to the query execution. Used by
   *     conforming
   * @param buildDirectlyFromRows If in transaction must construct a registered result from raw
   *     database rows.
   * @return the final (conformed, refreshed, wrapped) UnitOfWork query result
   */
  public Object registerResultInUnitOfWork(
      Object result,
      UnitOfWorkImpl unitOfWork,
      AbstractRecord arguments,
      boolean buildDirectlyFromRows) {
    // For bug 2612366: Conforming results in UOW extremely slow.
    // Replacing results with registered versions in the UOW is a part of
    // conforming and is now done while conforming to maximize performance.
    if (shouldConformResultsInUnitOfWork()
        || this.descriptor.shouldAlwaysConformResultsInUnitOfWork()) {
      return conformResult(result, unitOfWork, arguments, buildDirectlyFromRows);
    }

    // When building directly from rows, one of the performance benefits
    // is that we no longer have to wrap and then unwrap the originals.
    // result is just a vector, not a collection of wrapped originals.
    // Also for cursors the initial connection is automatically registered.
    if (buildDirectlyFromRows) {
      List<AbstractRecord> rows = (List<AbstractRecord>) result;
      ContainerPolicy cp = getContainerPolicy();
      int size = rows.size();
      Object clones = cp.containerInstance(size);
      for (int index = 0; index < size; index++) {
        AbstractRecord row = rows.get(index);

        // null is placed in the row collection for 1-m joining to filter duplicate rows.
        if (row != null) {
          Object clone = buildObject(row);
          cp.addInto(clone, clones, unitOfWork, row, this);
        }
      }
      return clones;
    }

    ContainerPolicy cp;
    Cursor cursor = null;

    // If the query is redirected then the collection returned might no longer
    // correspond to the original container policy.  CR#2342-S.M.
    if (getRedirector() != null) {
      cp = ContainerPolicy.buildPolicyFor(result.getClass());
    } else {
      cp = getContainerPolicy();
    }

    // In the case of cursors just register the initially read collection.
    if (cp.isCursorPolicy()) {
      cursor = (Cursor) result;
      // In nested UnitOfWork session might have been session of the parent.
      cursor.setSession(unitOfWork);
      cp = ContainerPolicy.buildPolicyFor(ClassConstants.Vector_class);
      result = cursor.getObjectCollection();
    }

    Object clones = cp.containerInstance(cp.sizeFor(result));
    AbstractSession sessionToUse = unitOfWork.getParent();
    for (Object iter = cp.iteratorFor(result); cp.hasNext(iter); ) {
      Object object = cp.next(iter, sessionToUse);
      Object clone = registerIndividualResult(object, unitOfWork, this.joinedAttributeManager);
      cp.addInto(clone, clones, unitOfWork);
    }
    if (cursor != null) {
      cursor.setObjectCollection((Vector) clones);
      return cursor;
    } else {
      return clones;
    }
  }
예제 #11
0
  /**
   * Commit all of the objects as a single transaction. This should commit the object in the correct
   * order to maintain referential integrity.
   */
  public void commitAllObjectsWithChangeSet(UnitOfWorkChangeSet uowChangeSet)
      throws RuntimeException, DatabaseException, OptimisticLockException {
    reinitialize();
    this.isActive = true;
    this.session.beginTransaction();
    try {
      // PERF: if the number of classes in the project is large this loop can be a perf issue.
      // If only one class types changed, then avoid loop.
      if ((uowChangeSet.getObjectChanges().size() + uowChangeSet.getNewObjectChangeSets().size())
          <= 1) {
        Iterator<Class> classes = uowChangeSet.getNewObjectChangeSets().keySet().iterator();
        if (classes.hasNext()) {
          Class theClass = classes.next();
          commitNewObjectsForClassWithChangeSet(uowChangeSet, theClass);
        }
        classes = uowChangeSet.getObjectChanges().keySet().iterator();
        if (classes.hasNext()) {
          Class theClass = classes.next();
          commitChangedObjectsForClassWithChangeSet(uowChangeSet, theClass);
        }
      } else {
        // The commit order is all of the classes ordered by dependencies, this is done for deadlock
        // avoidance.
        List commitOrder = getCommitOrder();
        int size = commitOrder.size();
        for (int index = 0; index < size; index++) {
          Class theClass = (Class) commitOrder.get(index);
          commitAllObjectsForClassWithChangeSet(uowChangeSet, theClass);
        }
      }

      if (hasDeferredCalls()) {
        // Perform all batched up calls, done to avoid dependencies.
        for (List<Object[]> calls : this.deferredCalls.values()) {
          for (Object[] argument : calls) {
            ((DatabaseQueryMechanism) argument[1])
                .executeDeferredCall((DatasourceCall) argument[0]);
          }
        }
      }

      if (hasDataModifications()) {
        // Perform all batched up data modifications, done to avoid dependencies.
        for (Map.Entry<DatabaseMapping, List<Object[]>> entry : this.dataModifications.entrySet()) {
          List<Object[]> events = entry.getValue();
          int size = events.size();
          DatabaseMapping mapping = entry.getKey();
          for (int index = 0; index < size; index++) {
            Object[] event = events.get(index);
            mapping.performDataModificationEvent(event, getSession());
          }
        }
      }

      if (hasObjectsToDelete()) {
        // These are orphaned objects, to be deleted from private ownership updates.
        // TODO: These should be added to the unit of work deleted so they are deleted in the
        // correct order.
        List objects = getObjectsToDelete();
        int size = objects.size();
        reinitialize();
        for (int index = 0; index < size; index++) {
          this.session.deleteObject(objects.get(index));
        }
      }

      this.session.commitTransaction();
    } catch (RuntimeException exception) {
      this.session.rollbackTransaction();
      throw exception;
    } finally {
      reinitialize();
      this.isActive = false;
    }
  }