/**
   * INTERNAL: Return the classification for the field contained in the mapping. This is used to
   * convert the row value to a consistent java value.
   */
  @Override
  public Class getFieldClassification(DatabaseField fieldToClassify) {
    if ((getTypeField() != null) && (fieldToClassify.equals(getTypeField()))) {
      return getTypeField().getType();
    }

    String queryKey = (String) getSourceToTargetQueryKeyNames().get(fieldToClassify);
    if (queryKey == null) {
      return null;
    }
    // Search any of the implementor descriptors for a mapping for the query-key.
    Iterator iterator =
        getReferenceDescriptor().getInterfacePolicy().getChildDescriptors().iterator();
    if (iterator.hasNext()) {
      ClassDescriptor firstChild = (ClassDescriptor) iterator.next();
      DatabaseMapping mapping = firstChild.getObjectBuilder().getMappingForAttributeName(queryKey);
      if ((mapping != null) && (mapping.isDirectToFieldMapping())) {
        return ((AbstractDirectMapping) mapping).getAttributeClassification();
      }
      QueryKey targetQueryKey = firstChild.getQueryKeyNamed(queryKey);
      if ((targetQueryKey != null) && (targetQueryKey.isDirectQueryKey())) {
        return firstChild
            .getObjectBuilder()
            .getFieldClassification(((DirectQueryKey) targetQueryKey).getField());
      }
    }
    return null;
  }
예제 #2
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  /**
   * PUBLIC: Connect to the database using the predefined login. This connects all of the child
   * sessions and expects that they are in a valid state to be connected.
   */
  public void login(String userName, String password) throws DatabaseException {
    // Bug#3440544 Check if logged in already to stop the attempt to login more than once
    if (isLoggedIn) {
      throw ValidationException.alreadyLoggedIn(this.getName());
    } else {
      if (this.eventManager != null) {
        this.eventManager.preLogin(this);
      }
      // Bug 3848021 - ensure the external transaction controller is initialized
      if (!isConnected()) {
        getServerPlatform().initializeExternalTransactionController();
      }

      // Connection all sessions and initialize
      for (Iterator sessionEnum = getSessionsByName().values().iterator();
          sessionEnum.hasNext(); ) {
        DatabaseSessionImpl session = (DatabaseSessionImpl) sessionEnum.next();
        if (session.hasEventManager()) {
          session.getEventManager().preLogin(session);
        }
        session.getDatasourceLogin().setUserName(userName);
        session.getDatasourceLogin().setPassword(password);

        if (!session.isConnected()) {
          session.connect();
        }
      }
      initializeDescriptors();
      this.isLoggedIn = true;
    }
  }
예제 #3
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  /**
   * PUBLIC: Return a session broker that behaves as a client session broker. An acquire session
   * broker is done under the covers on each session inside the session broker, and a new broker is
   * returned.
   *
   * <p>NOTE: when finished with the client broker, it should be releases. See
   * releaseClientSessionBroker.
   */
  public SessionBroker acquireClientSessionBroker() {
    log(SessionLog.FINER, SessionLog.CONNECTION, "acquire_client_session_broker");
    SessionBroker clientBroker = copySessionBroker();
    clientBroker.parent = this;
    clientBroker
        .getIdentityMapAccessorInstance()
        .setIdentityMapManager(getIdentityMapAccessorInstance().getIdentityMapManager());
    clientBroker.commitManager = getCommitManager();
    clientBroker.commandManager = getCommandManager();
    clientBroker.externalTransactionController = getExternalTransactionController();
    clientBroker.setServerPlatform(getServerPlatform());
    String sessionName;
    AbstractSession serverSession;
    Iterator names = this.getSessionsByName().keySet().iterator();
    while (names.hasNext()) {
      sessionName = (String) names.next();
      serverSession = getSessionForName(sessionName);
      if (serverSession instanceof org.eclipse.persistence.sessions.server.ServerSession) {
        if (serverSession.getProject().hasIsolatedClasses()) {
          throw ValidationException.isolatedDataNotSupportedInSessionBroker(sessionName);
        }
        clientBroker.internalRegisterSession(
            sessionName,
            ((org.eclipse.persistence.sessions.server.ServerSession) serverSession)
                .acquireClientSession());
      } else {
        throw ValidationException.cannotAcquireClientSessionFromSession();
      }
    }

    clientBroker.initializeSequencing();
    return clientBroker;
  }
 /**
  * INTERNAL: Convert all the class-name-based settings in this mapping to actual class-based
  * settings. This method is used when converting a project that has been built with class names to
  * a project with classes.
  */
 @Override
 public void convertClassNamesToClasses(ClassLoader classLoader) {
   super.convertClassNamesToClasses(classLoader);
   Iterator iterator = getTypeIndicatorNameTranslation().entrySet().iterator();
   this.typeIndicatorTranslation = new HashMap();
   while (iterator.hasNext()) {
     Map.Entry entry = (Map.Entry) iterator.next();
     String referenceClassName = (String) entry.getKey();
     Object indicator = entry.getValue();
     Class referenceClass = null;
     try {
       if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()) {
         try {
           referenceClass =
               (Class)
                   AccessController.doPrivileged(
                       new PrivilegedClassForName(referenceClassName, true, classLoader));
         } catch (PrivilegedActionException exception) {
           throw ValidationException.classNotFoundWhileConvertingClassNames(
               referenceClassName, exception.getException());
         }
       } else {
         referenceClass =
             PrivilegedAccessHelper.getClassForName(referenceClassName, true, classLoader);
       }
     } catch (ClassNotFoundException exception) {
       throw ValidationException.classNotFoundWhileConvertingClassNames(
           referenceClassName, exception);
     }
     addClassIndicator(referenceClass, indicator);
   }
 }
  /**
   * INTERNAL: This methods clones all the fields and ensures that each collection refers to the
   * same clones.
   */
  @Override
  public Object clone() {
    VariableOneToOneMapping clone = (VariableOneToOneMapping) super.clone();
    Map setOfKeys = new HashMap(getSourceToTargetQueryKeyNames().size());
    Map sourceToTarget = new HashMap(getSourceToTargetQueryKeyNames().size());
    Vector foreignKeys =
        org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(
            getForeignKeyFields().size());

    if (getTypeField() != null) {
      clone.setTypeField((DatabaseField) this.getTypeField().clone());
    }

    for (Iterator enumtr = getSourceToTargetQueryKeyNames().keySet().iterator();
        enumtr.hasNext(); ) {
      // Clone the SourceKeyFields
      DatabaseField field = (DatabaseField) enumtr.next();
      DatabaseField clonedField = (DatabaseField) field.clone();
      setOfKeys.put(field, clonedField);
      // on the next line I'm cloning the query key names
      sourceToTarget.put(clonedField, getSourceToTargetQueryKeyNames().get(field));
    }

    for (Enumeration enumtr = getForeignKeyFields().elements(); enumtr.hasMoreElements(); ) {
      DatabaseField field = (DatabaseField) enumtr.nextElement();
      foreignKeys.addElement(setOfKeys.get(field));
    }
    clone.setSourceToTargetQueryKeyFields(sourceToTarget);
    clone.setForeignKeyFields(foreignKeys);
    clone.setTypeIndicatorTranslation(new HashMap(this.getTypeIndicatorTranslation()));
    return clone;
  }
예제 #6
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  /**
   * PUBLIC: set the integrityChecker. IntegrityChecker holds all the ClassDescriptor Exceptions.
   */
  public void setIntegrityChecker(IntegrityChecker integrityChecker) {
    super.setIntegrityChecker(integrityChecker);

    for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
      AbstractSession session = (AbstractSession) sessionEnum.next();
      session.setIntegrityChecker(integrityChecker);
    }
  }
예제 #7
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  /**
   * PUBLIC: Set the message log.
   *
   * @see #logMessages()
   */
  public void setLog(Writer log) {
    super.setLog(log);

    for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
      AbstractSession session = (AbstractSession) sessionEnum.next();
      session.setLog(log);
    }
  }
예제 #8
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  /**
   * PUBLIC: Set the profiler for the session. This allows for performance operations to be
   * profiled.
   */
  public void setProfiler(SessionProfiler profiler) {
    super.setProfiler(profiler);

    for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
      AbstractSession session = (AbstractSession) sessionEnum.next();
      session.setProfiler(profiler);
    }
  }
예제 #9
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 /**
  * INTERNAL: Set isSynchronized flag to indicate that members of session broker are synchronized.
  * This method should only be called by setSynchronized method of UnitOfWork obtained from either
  * DatabaseSession Broker or ClientSession Broker.
  */
 public void setSynchronized(boolean synched) {
   if (!isServerSessionBroker()) {
     super.setSynchronized(synched);
     Iterator itSessions = getSessionsByName().values().iterator();
     while (itSessions.hasNext()) {
       ((AbstractSession) itSessions.next()).setSynchronized(synched);
     }
   }
 }
 /**
  * INTERNAL: The foreign key names and their primary keys are converted to DatabaseField and
  * stored.
  */
 protected void initializeForeignKeys(AbstractSession session) {
   HashMap newSourceToTargetQueryKeyNames = new HashMap(getSourceToTargetQueryKeyNames().size());
   Iterator iterator = getSourceToTargetQueryKeyNames().entrySet().iterator();
   while (iterator.hasNext()) {
     Map.Entry entry = (Map.Entry) iterator.next();
     DatabaseField field = getDescriptor().buildField((DatabaseField) entry.getKey());
     newSourceToTargetQueryKeyNames.put(field, entry.getValue());
   }
   this.sourceToTargetQueryKeyNames = newSourceToTargetQueryKeyNames;
 }
예제 #11
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  /** PUBLIC: Return if this session is a server session broker. */
  public boolean isServerSessionBroker() {
    for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
      AbstractSession session = (AbstractSession) sessionEnum.next();
      if (session.isServerSession()) {
        return true;
      }
    }

    return false;
  }
예제 #12
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 /**
  * PUBLIC: Release the session. This does nothing by default, but allows for other sessions such
  * as the ClientSession to do something.
  */
 public void release() {
   if (isClientSessionBroker()) {
     log(SessionLog.FINER, SessionLog.CONNECTION, "releasing_client_session_broker");
   }
   AbstractSession session;
   for (Iterator enumtr = getSessionsByName().values().iterator(); enumtr.hasNext(); ) {
     session = (AbstractSession) enumtr.next();
     session.release();
   }
   super.release();
 }
  /** PUBLIC: Return a collection of the field to query key associations. */
  public Vector getSourceToTargetQueryKeyFieldAssociations() {
    Vector associations = new Vector(getSourceToTargetQueryKeyNames().size());
    Iterator sourceFieldEnum = getSourceToTargetQueryKeyNames().keySet().iterator();
    Iterator targetQueryKeyEnum = getSourceToTargetQueryKeyNames().values().iterator();
    while (sourceFieldEnum.hasNext()) {
      Object fieldValue = ((DatabaseField) sourceFieldEnum.next()).getQualifiedName();
      Object attributeValue = targetQueryKeyEnum.next();
      associations.addElement(new Association(fieldValue, attributeValue));
    }

    return associations;
  }
예제 #14
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 /**
  * PUBLIC: Disconnect from all databases.
  *
  * @exception EclipseLinkException if a transaction is active, you must rollback any active
  *     transaction before logout.
  * @exception DatabaseException the database will also raise an error if their is an active
  *     transaction, or a general error occurs.
  */
 public void logout() throws DatabaseException {
   for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
     DatabaseSessionImpl session = (DatabaseSessionImpl) sessionEnum.next();
     session.logout();
   }
   if (!isClientSessionBroker()) {
     if (hasExternalTransactionController()) {
       getExternalTransactionController().clearSequencingListeners();
     }
   }
   sequencing = null;
   isLoggedIn = false;
 }
예제 #15
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 /** INTERNAL: Rollback the transaction on all child sessions. */
 protected void basicRollbackTransaction() throws DatabaseException {
   DatabaseException globalException = null;
   for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
     AbstractSession session = (AbstractSession) sessionEnum.next();
     try {
       session.rollbackTransaction();
     } catch (DatabaseException exception) {
       globalException = exception;
     }
   }
   if (globalException != null) {
     throw globalException;
   }
 }
예제 #16
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 /**
  * INTERNAL: Returns a number of member sessions that require sequencing callback. Always returns
  * 0 if sequencing is not connected.
  */
 public int howManySequencingCallbacks() {
   if (this.isClientSessionBroker()) {
     return getParent().howManySequencingCallbacks();
   } else {
     int nCallbacks = 0;
     Iterator itSessions = getSessionsByName().values().iterator();
     while (itSessions.hasNext()) {
       if (((DatabaseSessionImpl) itSessions.next()).isSequencingCallbackRequired()) {
         nCallbacks++;
       }
     }
     return nCallbacks;
   }
 }
예제 #17
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  /** PUBLIC: Return if all sessions are still connected to the database. */
  public boolean isConnected() {
    if ((getSessionsByName() == null) || (getSessionsByName().isEmpty())) {
      return false;
    }

    for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
      AbstractSession session = (AbstractSession) sessionEnum.next();
      if (!session.isConnected()) {
        return false;
      }
    }

    return true;
  }
  /**
   * INTERNAL: Return the typeIndicatorName translation Used by the Mapping Workbench to avoid
   * classpath dependencies
   */
  public Map getTypeIndicatorNameTranslation() {
    if (typeIndicatorNameTranslation.isEmpty() && !typeIndicatorTranslation.isEmpty()) {
      Iterator keysEnum = typeIndicatorTranslation.keySet().iterator();
      Iterator valuesEnum = typeIndicatorTranslation.values().iterator();
      while (keysEnum.hasNext()) {
        Object key = keysEnum.next();
        Object value = valuesEnum.next();
        if (key instanceof Class) {
          String className = ((Class) key).getName();
          typeIndicatorNameTranslation.put(className, value);
        }
      }
    }

    return typeIndicatorNameTranslation;
  }
예제 #19
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  /**
   * PUBLIC: Register the session under its name. All of the session's descriptors must have already
   * been registered. The session should not be connected and descriptors should not be initialized.
   */
  public void registerSession(String name, AbstractSession session) {
    session.setIsInBroker(true);
    getSessionsByName().put(name, session);
    session.setBroker(this);
    session.setName(name);

    // The keys/classes must also be used as some descriptors may be under multiple classes.
    Iterator descriptors = session.getDescriptors().values().iterator();
    Iterator classes = session.getDescriptors().keySet().iterator();
    while (descriptors.hasNext()) {
      ClassDescriptor descriptor = (ClassDescriptor) descriptors.next();
      Class descriptorClass = (Class) classes.next();
      getSessionNamesByClass().put(descriptorClass, name);
      getDescriptors().put(descriptorClass, descriptor);
    }
  }
  /**
   * INTERNAL: Return the class indicator associations for XML. List of class-name/value
   * associations.
   */
  public Vector getClassIndicatorAssociations() {
    Vector associations = new Vector();
    Iterator classesEnum = getTypeIndicatorNameTranslation().keySet().iterator();
    Iterator valuesEnum = getTypeIndicatorNameTranslation().values().iterator();
    while (classesEnum.hasNext()) {
      Object className = classesEnum.next();

      // If the project was built in runtime is a class, MW is a string.
      if (className instanceof Class) {
        className = ((Class) className).getName();
      }
      Object value = valuesEnum.next();
      associations.addElement(new TypedAssociation(className, value));
    }

    return associations;
  }
  /** INTERNAL: Set the type field classification through searching the indicators hashtable. */
  @Override
  public void preInitialize(AbstractSession session) throws DescriptorException {
    super.preInitialize(session);
    if (getTypeIndicatorTranslation().isEmpty()) {
      return;
    }
    Class type = null;
    for (Iterator typeValuesEnum = getTypeIndicatorTranslation().values().iterator();
        typeValuesEnum.hasNext() && (type == null); ) {
      Object value = typeValuesEnum.next();
      if ((value != Helper.getNullWrapper()) && (!(value instanceof Class))) {
        type = value.getClass();
      }
    }

    getTypeField().setType(type);
  }
  /**
   * INTERNAL: Compare the references of the two objects are the same, not the objects themselves.
   * Used for independent relationships. This is used for testing and validation purposes.
   *
   * <p>Must get separate fields for the objects because we may be adding a different class to the
   * attribute because of the interface
   */
  @Override
  protected boolean compareObjectsWithoutPrivateOwned(
      Object firstObject, Object secondObject, AbstractSession session) {
    Object firstPrivateObject = getRealAttributeValueFromObject(firstObject, session);
    Object secondPrivateObject = getRealAttributeValueFromObject(secondObject, session);

    if ((firstPrivateObject == null) && (secondPrivateObject == null)) {
      return true;
    }

    if ((firstPrivateObject == null) || (secondPrivateObject == null)) {
      return false;
    }
    if (firstPrivateObject.getClass() != secondPrivateObject.getClass()) {
      return false;
    }
    Iterator targetKeys = getSourceToTargetQueryKeyNames().values().iterator();
    ClassDescriptor descriptor = session.getDescriptor(firstPrivateObject.getClass());
    ClassDescriptor descriptor2 = session.getDescriptor(secondPrivateObject.getClass());

    while (targetKeys.hasNext()) {
      String queryKey = (String) targetKeys.next();
      DatabaseField field = descriptor.getObjectBuilder().getFieldForQueryKeyName(queryKey);
      Object firstObjectField =
          descriptor
              .getObjectBuilder()
              .extractValueFromObjectForField(firstPrivateObject, field, session);
      DatabaseField field2 = descriptor2.getObjectBuilder().getFieldForQueryKeyName(queryKey);
      Object secondObjectField =
          descriptor2
              .getObjectBuilder()
              .extractValueFromObjectForField(secondPrivateObject, field2, session);

      if (!((firstObjectField == null) && (secondObjectField == null))) {
        if ((firstObjectField == null) || (secondObjectField == null)) {
          return false;
        }
        if (!firstObjectField.equals(secondObjectField)) {
          return false;
        }
      }
    }

    return true;
  }
예제 #23
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  /** INTERNAL: Acquires a special historical session for reading objects as of a past time. */
  public org.eclipse.persistence.sessions.Session acquireHistoricalSession(AsOfClause clause)
      throws ValidationException {
    if (isServerSessionBroker()) {
      throw ValidationException.cannotAcquireHistoricalSession();
    }

    // ? logMessage("acquire_client_session_broker", (Object[])null);
    SessionBroker historicalBroker = copySessionBroker();
    String sessionName;
    AbstractSession session;
    Iterator names = this.getSessionsByName().keySet().iterator();
    while (names.hasNext()) {
      sessionName = (String) names.next();
      session = getSessionForName(sessionName);
      historicalBroker.registerSession(sessionName, session.acquireHistoricalSession(clause));
    }
    return historicalBroker;
  }
예제 #24
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  // Bug#3551263  Override getQuery(String name, Vector arguments) in Session search through
  // the server session broker as well
  public DatabaseQuery getQuery(String name, Vector arguments) {
    DatabaseQuery query = super.getQuery(name, arguments);
    if (isClientSessionBroker() && (query == null)) {
      String sessionName = null;
      AbstractSession ssession = null;
      Iterator names = this.getSessionsByName().keySet().iterator();
      while (names.hasNext()) {
        sessionName = (String) names.next();
        ssession = getSessionForName(sessionName);
        if (ssession instanceof org.eclipse.persistence.sessions.server.ClientSession) {
          query = ((ClientSession) ssession).getParent().getBroker().getQuery(name, arguments);
          if (query != null) {
            return query;
          }
        }
      }
    }

    return query;
  }
예제 #25
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  /** PUBLIC: Return true if the pre-defined query is defined on the session. */
  public boolean containsQuery(String queryName) {
    boolean containsQuery = getQueries().containsKey(queryName);
    if (isClientSessionBroker() && (containsQuery == false)) {
      String sessionName = null;
      AbstractSession ssession = null;

      Iterator names = this.getSessionsByName().keySet().iterator();
      while (names.hasNext()) {
        sessionName = (String) names.next();
        ssession = getSessionForName(sessionName);
        if (ssession instanceof org.eclipse.persistence.sessions.server.ClientSession) {
          if (((ClientSession) ssession).getParent().getBroker().containsQuery(queryName)) {
            return true;
          }
        }
      }
    }

    return containsQuery;
  }
  /**
   * INTERNAL: Selection criteria is created with source foreign keys and target keys. This criteria
   * is then used to read target records from the table.
   */
  public void initializeSelectionCriteria(AbstractSession session) {
    Expression selectionCriteria = null;
    Expression expression;

    ExpressionBuilder expBuilder = new ExpressionBuilder();

    Iterator sourceKeysEnum = getSourceToTargetQueryKeyNames().keySet().iterator();

    while (sourceKeysEnum.hasNext()) {
      DatabaseField sourceKey = (DatabaseField) sourceKeysEnum.next();
      String target = (String) this.getSourceToTargetQueryKeyNames().get(sourceKey);
      expression = expBuilder.getParameter(sourceKey).equal(expBuilder.get(target));

      if (selectionCriteria == null) {
        selectionCriteria = expression;
      } else {
        selectionCriteria = expression.and(selectionCriteria);
      }
    }

    setSelectionCriteria(selectionCriteria);
  }
예제 #27
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  /**
   * PUBLIC: Return the query from the session pre-defined queries with the given name. This allows
   * for common queries to be pre-defined, reused and executed by name.
   */
  public DatabaseQuery getQuery(String name) {
    // Bug#3473441 Should always call super first to ensure any change in Session will be reflected
    // here.
    DatabaseQuery query = super.getQuery(name);
    if (isClientSessionBroker() && (query == null)) {
      String sessionName = null;
      AbstractSession ssession = null;
      Iterator names = this.getSessionsByName().keySet().iterator();
      while (names.hasNext()) {
        sessionName = (String) names.next();
        ssession = getSessionForName(sessionName);
        if (ssession instanceof org.eclipse.persistence.sessions.server.ClientSession) {
          query = ((ClientSession) ssession).getParent().getBroker().getQuery(name);
          if (query != null) {
            return query;
          }
        }
      }
    }

    return query;
  }
예제 #28
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 /**
  * INTERNAL: This method notifies the accessor that a particular sets of writes has completed.
  * This notification can be used for such thing as flushing the batch mechanism
  */
 public void writesCompleted() {
   for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
     AbstractSession session = (AbstractSession) sessionEnum.next();
     if (!session.isConnected()) {
       throw DatabaseException.databaseAccessorNotConnected();
     }
   }
   for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
     AbstractSession session = (AbstractSession) sessionEnum.next();
     session.writesCompleted();
   }
 }
예제 #29
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 /**
  * INTERNAL: Commit the transaction on all child sessions. This assumes that the commit of the
  * transaction will not fail because all of the modification has already taken place and no errors
  * would have occurred.
  */
 protected void basicCommitTransaction() throws DatabaseException {
   // Do one last check it make sure that all sessions are still connected.
   for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
     AbstractSession session = (AbstractSession) sessionEnum.next();
     if (!session.isConnected()) {
       throw DatabaseException.databaseAccessorNotConnected();
     }
   }
   for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
     AbstractSession session = (AbstractSession) sessionEnum.next();
     session.commitTransaction();
   }
 }
예제 #30
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  /**
   * INTERNAL: Allow each descriptor to initialize any dependencies on this session. This is done in
   * two passes to allow the inheritance to be resolved first. Normally the descriptors are added
   * before login, then initialized on login.
   */
  public void initializeDescriptors() {
    // ClientSession initializes sequencing during construction,
    // however DatabaseSession and ServerSession normally call initializeSequencing()
    // in initializeDescriptors method.
    // Because initializeDescriptors() is not called for a session-member of a SessionBroker,
    // initializeSequencing() for the sessions should be called here.
    if (!isClientSessionBroker()) {
      for (Iterator enumtr = getSessionsByName().values().iterator(); enumtr.hasNext(); ) {
        DatabaseSessionImpl databaseSession = (DatabaseSessionImpl) enumtr.next();
        databaseSession.initializeSequencing();
      }
      if (hasExternalTransactionController()) {
        getExternalTransactionController().initializeSequencingListeners();
      }
    }
    super.initializeDescriptors();
    // Must reset project options to session broker project, as initialization occurs
    // with local projects.
    for (Iterator enumtr = getSessionsByName().values().iterator(); enumtr.hasNext(); ) {
      DatabaseSessionImpl databaseSession = (DatabaseSessionImpl) enumtr.next();
      if (databaseSession.getProject().hasGenericHistorySupport()) {
        getProject().setHasGenericHistorySupport(true);
      }
      if (databaseSession.getProject().hasIsolatedClasses()) {
        getProject().setHasIsolatedClasses(true);
      }
      if (databaseSession.getProject().hasNonIsolatedUOWClasses()) {
        getProject().setHasNonIsolatedUOWClasses(true);
      }
      getProject()
          .getDefaultReadOnlyClasses()
          .addAll(databaseSession.getProject().getDefaultReadOnlyClasses());
    }

    // ServerSessionBroker doesn't need sequencing.
    // Sequencing should be obtained either from the ClientSessionBroker or directly
    // from the ClientSession.
    if (isServerSessionBroker()) {
      sequencing = null;
    }
  }