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## com.beasys.commerce.foundation.exception
Class SystemException

    java.lang.Object
      java.lang.Throwable
          java.lang.Exception
              java.lang.RuntimeException
                  javax.ejb.EJBException
                      com.beasys.commerce.foundation.exception.SystemException

All Implemented Interfaces:
  MessageCatalogException, Serializable

Direct Known Subclasses:
  CreateSystemException, DeploymentException, DiscountSystemException, FatalWorkflowTransitionException, FinderSystemException, NamingSystemException, PipelineException, RemoteSystemException, UnimplementedException, WebflowException, WorkflowInstantiationException

public class SystemException
extends EJBException
implements MessageCatalogException

The `SystemException` class is used to signal system-level exceptions to a caller. It is the base system exception class. A system-level exception is a severe exception that prevents a thread of execution from proceeding in a normal manner.

The `SystemException` class is closely tied to the `MessageCatalog`. An `SystemException` contains a log and user message that is constructed using the `MessageCatalog`. In fact, each `SystemException` derivative should have at least one user and log catalog message.

In the case of an EJB, the following guidelines should be followed:

If an enterprise bean method encounters a system-level exception or error that does not allow the method to successfully complete, the method should throw a suitable system exception compatible with the method's throw clause:

- If the bean method encounters a `RuntimeException` or error, it should simply propagate the error from the bean method to the Container.
- If the bean method encounters a checked exception that the bean cannot recover from, the bean method should throw a `SystemException` or derivative that wraps the original exception.
- Any other fatal error should be reported using a `SystemException` or `EJBException`.

A bean provider is responsible for using the standard EJB system exceptions (`EJBException` and `NoSuchEntityException`) where appropriate.

Since the practice of throwing a `RemoteException` has been deprecated in the EJB 1.1 specification, all such occurrences must be replaced with an instance of `SystemException`. In the case of a bean method that calls another bean method, all `RemoteException`s should simply be propagated from the bean method.

If an EJB method throws a `SystemException`, any existing transaction will be rolled back by the Container and the bean's state will be set to "does not exists".

See Also:
  `EJBException`, `MessageCatalog`, `MessageCatalogException`, Serialized Form

Field Summary
`protected Stack` | `logMessages` The log messages.
`protected Stack` | `userMessages` The user messages.

Constructor Summary
`SystemException()` Constructs an `SystemException` with no associated message.
`SystemException(String namespace, String messageKey)` Class constructor taking the namespace and key of the associated catalog message.
`SystemException(String namespace, String messageKey, Exception exception)` Class constructor taking the namespace and key of the associated catalog message and an embedded exception.
`SystemException(String namespace, String messageKey, Object argument)` Class constructor taking the namespace and key of the associated catalog message and a message parameter substitution argument.
`SystemException(String namespace, String messageKey, Object[] arguments)` Class constructor taking the namespace and key of the associated catalog message and message parameter substitution arguments.
`SystemException(String namespace, String messageKey, Object[] arguments, Exception exception)` Class constructor taking the namespace and key of the associated catalog message, message parameter substitution arguments, and an embedded exception.
`SystemException(String namespace, String messageKey, Object argument, Exception exception)` Class constructor taking the namespace and key of the associated catalog message, message parameter substitution argument, and an embedded exception.
`SystemException(SystemException topException, SystemException bottomException)` Constructs an `SystemException` from two source `SystemException`s by concatinating the screen and log messages of the two source `SystemException`s.

Method Summary
`void` | `addLogMessage(String namespace, String messageKey)` Adds a new log catalog message to the stack of associated messages.
`void` | `addLogMessage(String namespace, String messageKey, Object argument)` Adds a new log catalog message to the stack of associated messages.
`void` | `addLogMessage(String namespace, String messageKey, Object[] arguments)` Adds a new log catalog message to the stack of associated messages.
`void` | `addMessage(String namespace, String messageKey)` Adds a new user and log catalog message to the stack of associated messages.
`void` | `addMessage(String namespace, String messageKey, Object argument)` Adds a new user catalog message to the stack of associated messages.
`void` | `addMessage(String namespace, String messageKey, Object[] arguments)` Adds a new user catalog message to the stack of associated messages.
`void` | `addUserMessage(String namespace, String messageKey)` Adds a new user catalog message to the stack of associated messages.
`void` | `addUserMessage(String namespace, String messageKey, Object argument)` Adds a new user catalog message to the stack of associated messages.
`void` | `addUserMessage(String namespace, String messageKey, Object[] arguments)` Adds a new user catalog message to the stack of associated messages.
`Exception` | `getEmbeddedException()` Gets the embedded exception associated with this exception.
`String` | `getLocalizedMessage()` Returns the user message associated with this exception.
`String` | `getLogMessage()` Returns the first log catalog message associated with this exception.
`Iterator` | `getLogMessages()` Returns an iterator over all the log catalog messages associated with this exception.
`String` | `getMessage()` Returns the user message associated with this exception.
`String` | `getUserMessage()` Returns the first user catalog message associated with this exception.
`Iterator` | `getUserMessages()` Returns an iterator over all the user catalog messages associated with this exception.
`String` | `toString()` Returns a string representation of this exception.

Methods inherited from class javax.ejb.EJBException
`getCausedByException, printStackTrace, printStackTrace, printStackTrace`

Methods inherited from class java.lang.Throwable
`fillInStackTrace, getCause, getStackTrace, initCause, setStackTrace`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

### logMessages

    protected Stack logMessages

  The log messages.

### userMessages

    protected Stack userMessages

  The user messages.

Constructor Detail

### SystemException

    public SystemException()

  Constructs an `SystemException` with no associated message.

### SystemException

    public SystemException(String namespace,
                           String messageKey)

  Class constructor taking the namespace and key of the associated catalog message.

### SystemException

    public SystemException(String namespace,
                           String messageKey,
                           Exception exception)

  Class constructor taking the namespace and key of the associated catalog message and an embedded exception.

### SystemException

    public SystemException(String namespace,
                           String messageKey,
                           Object argument)

  Class constructor taking the namespace and key of the associated catalog message and a message parameter substitution argument.

### SystemException

    public SystemException(String namespace,
                           String messageKey,
                           Object[] arguments)

  Class constructor taking the namespace and key of the associated catalog message and message parameter substitution arguments.

### SystemException

    public SystemException(String namespace,
                           String messageKey,
                           Object[] arguments,
                           Exception exception)

  Class constructor taking the namespace and key of the associated catalog message, message parameter substitution arguments, and an embedded exception.

### SystemException

    public SystemException(String namespace,
                           String messageKey,
                           Object argument,
                           Exception exception)

  Class constructor taking the namespace and key of the associated catalog message, message parameter substitution argument, and an embedded exception.

### SystemException

    public SystemException(SystemException topException,
                           SystemException bottomException)

  Constructs an `SystemException` from two source `SystemException`s by concatinating the screen and log messages of the two source `SystemException`s. The messages of the first `SystemException` will preceed those of the second in the constructed `SystemException`. Furthermore, the new `SystemException` will have the embedded exception of the first `SystemException` associated with it.

Method Detail

### addLogMessage

    public void addLogMessage(String namespace,
                              String messageKey)

  Description copied from interface: `MessageCatalogException`
  Adds a new log catalog message to the stack of associated messages.

  Specified by:
    `addLogMessage` in interface `MessageCatalogException`
  Parameters:
    `namespace` - Log catalog message namespace.
    `messageKey` - Log catalog message key.

### addLogMessage

    public void addLogMessage(String namespace,
                              String messageKey,
                              Object argument)

  Description copied from interface: `MessageCatalogException`
  Adds a new log catalog message to the stack of associated messages.

  Specified by:
    `addLogMessage` in interface `MessageCatalogException`
  Parameters:
    `namespace` - Log catalog message namespace.
    `messageKey` - Log catalog message key.
    `argument` - Message parameter substitution argument.

### addLogMessage

    public void addLogMessage(String namespace,
                              String messageKey,
                              Object[] arguments)

  Description copied from interface: `MessageCatalogException`
  Adds a new log catalog message to the stack of associated messages.

  Specified by:
    `addLogMessage` in interface `MessageCatalogException`
  Parameters:
    `namespace` - Log catalog message namespace.
    `messageKey` - Log catalog message key.

### addMessage

    public void addMessage(String namespace,
                           String messageKey)

  Description copied from interface: `MessageCatalogException`
  Adds a new user and log catalog message to the stack of associated messages.

  Specified by:
    `addMessage` in interface `MessageCatalogException`
  Parameters:
    `namespace` - User and log catalog message namespace.
    `messageKey` - User and log catalog message key.

### addMessage

    public void addMessage(String namespace,
                           String messageKey,
                           Object argument)

  Description copied from interface: `MessageCatalogException`
  Adds a new user catalog message to the stack of associated messages.

  Specified by:
    `addMessage` in interface `MessageCatalogException`
  Parameters:
    `namespace` - User and log catalog message namespace.
    `messageKey` - User and log catalog message key.
    `argument` - Message parameter substitution argument.

### addMessage

    public void addMessage(String namespace,
                           String messageKey,
                           Object[] arguments)

  Description copied from interface: `MessageCatalogException`
  Adds a new user catalog message to the stack of associated messages.

  Specified by:
    `addMessage` in interface `MessageCatalogException`
  Parameters:
    `namespace` - User and log catalog message namespace.
    `messageKey` - User and log catalog message key.

### addUserMessage

    public void addUserMessage(String namespace,
                               String messageKey)

  Description copied from interface: `MessageCatalogException`
  Adds a new user catalog message to the stack of associated messages.

  Specified by:
    `addUserMessage` in interface `MessageCatalogException`
  Parameters:
    `namespace` - User catalog message namespace.
    `messageKey` - User catalog message key.

### addUserMessage

    public void addUserMessage(String namespace,
                               String messageKey,
                               Object argument)

  Description copied from interface: `MessageCatalogException`
  Adds a new user catalog message to the stack of associated messages.

  Specified by:
    `addUserMessage` in interface `MessageCatalogException`
  Parameters:
    `namespace` - User catalog message namespace.
    `messageKey` - User catalog message key.
    `argument` - Message parameter substitution argument.

### addUserMessage

    public void addUserMessage(String namespace,
                               String messageKey,
                               Object[] arguments)

  Description copied from interface: `MessageCatalogException`
  Adds a new user catalog message to the stack of associated messages.

  Specified by:
    `addUserMessage` in interface `MessageCatalogException`
  Parameters:
    `namespace` - User catalog message namespace.
    `messageKey` - User catalog message key.

### getEmbeddedException

    public Exception getEmbeddedException()

  Description copied from interface: `MessageCatalogException`
  Gets the embedded exception associated with this exception.

  Specified by:
    `getEmbeddedException` in interface `MessageCatalogException`
  Returns:
    The embedded exception.

### getLocalizedMessage

    public String getLocalizedMessage()

  Returns the user message associated with this exception.

  Returns:
    The user message associated with this exception.

### getLogMessage

    public String getLogMessage()

  Description copied from interface: `MessageCatalogException`
  Returns the first log catalog message associated with this exception.

  Specified by:
    `getLogMessage` in interface `MessageCatalogException`
  Returns:
    The first log catalog message associated with this exception.

### getLogMessages

    public Iterator getLogMessages()

  Description copied from interface: `MessageCatalogException`
  Returns an iterator over all the log catalog messages associated with this exception.

  Specified by:
    `getLogMessages` in interface `MessageCatalogException`
  Returns:
    An iterator over all log catalog messages.

### getMessage

    public String getMessage()

  Returns the user message associated with this exception.

  Returns:
    The user message associated with this exception.

### getUserMessage

    public String getUserMessage()

  Description copied from interface: `MessageCatalogException`
  Returns the first user catalog message associated with this exception.

  Specified by:
    `getUserMessage` in interface `MessageCatalogException`
  Returns:
    The user catalog message associated with this exception.

### getUserMessages

    public Iterator getUserMessages()

  Description copied from interface: `MessageCatalogException`
  Returns an iterator over all the user catalog messages associated with this exception.

  Specified by:
    `getUserMessages` in interface `MessageCatalogException`
  Returns:
    An iterator over all user catalog messages.

### toString

    public String toString()

  Returns a string representation of this exception.

  Returns:
    A string representation of this exception.

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Copyright © 2005 BEA Systems, Inc. All Rights Reserved