org.apache.slide.common
Class ServiceImpl

java.lang.Object
  |
  +--org.apache.slide.common.ServiceImpl
All Implemented Interfaces:
Service
Direct Known Subclasses:
StandardStore

public abstract class ServiceImpl
extends java.lang.Object
implements Service

Slide Service interface.

Version:
$Revision: 1.3 $
Author:
Remy Maucherat

Constructor Summary
ServiceImpl()
           
 
Method Summary
 void begin()
          Begin a new transaction.
 boolean cacheResults()
          Indicates whether or not the objects managed by this service should be cached.
 void commit()
          Try to commit the data managed by the service to the repository.
abstract  void connect()
          Connects to the underlying data source (if any is needed).
 boolean connectIfNeeded()
          Connects to the service, if we were not previously connected.
abstract  void disconnect()
          Disconnects from the underlying data source.
abstract  void initialize(NamespaceAccessToken token)
          Initializes service.
abstract  boolean isConnected()
          This function tells whether or not the service is connected.
abstract  void reset()
          Deletes service underlying data source, if possible (and meaningful).
abstract  void setParameters(java.util.Hashtable parameters)
          Initializes the service with a set of parameters.
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ServiceImpl

public ServiceImpl()
Method Detail

setParameters

public abstract void setParameters(java.util.Hashtable parameters)
                            throws ServiceParameterErrorException,
                                   ServiceParameterMissingException
Initializes the service with a set of parameters. Those could be :
  • User name, login info
  • Host name on which to connect
  • Remote port
  • JDBC driver whoich is to be used :-)
  • Anything else ...
    Specified by:
    setParameters in interface Service
    Parameters:
    parameters - Hashtable containing the parameters' names and associated values
    Throws:
    ServiceParameterErrorException - Incorrect service parameter
    ServiceParameterMissingException - Service parameter missing

  • connect

    public abstract void connect()
                          throws ServiceConnectionFailedException
    Connects to the underlying data source (if any is needed).
    Specified by:
    connect in interface Service
    Throws:
    ServiceConnectionFailedException - Connection failed

    disconnect

    public abstract void disconnect()
                             throws ServiceDisconnectionFailedException
    Disconnects from the underlying data source.
    Specified by:
    disconnect in interface Service
    Throws:
    ServiceDisconnectionFailedException - Disconnection failed

    initialize

    public abstract void initialize(NamespaceAccessToken token)
                             throws ServiceInitializationFailedException
    Initializes service.
    Specified by:
    initialize in interface Service
    Parameters:
    token - Namespace access token, needed if the service needs to access objects or data within the namespace during its initialization
    Throws:
    ServiceInitializationFailedException - May throw an exception if the service has already been initialized before

    reset

    public abstract void reset()
                        throws ServiceResetFailedException
    Deletes service underlying data source, if possible (and meaningful).
    Specified by:
    reset in interface Service
    Throws:
    ServiceResetFailedException - Reset failed

    begin

    public void begin()
               throws ServiceAccessException
    Begin a new transaction.
    Specified by:
    begin in interface Service
    Throws:
    ServiceAccessException - Service access error

    commit

    public void commit()
                throws ServiceAccessException
    Try to commit the data managed by the service to the repository.
    Specified by:
    commit in interface Service
    Throws:
    ServiceAccessException - Service access error

    isConnected

    public abstract boolean isConnected()
                                 throws ServiceAccessException
    This function tells whether or not the service is connected.
    Specified by:
    isConnected in interface Service
    Returns:
    boolean true if we are connected
    Throws:
    ServiceAccessException - Service access error

    connectIfNeeded

    public boolean connectIfNeeded()
                            throws ServiceConnectionFailedException,
                                   ServiceAccessException
    Connects to the service, if we were not previously connected.
    Specified by:
    connectIfNeeded in interface Service
    Returns:
    boolean true if we were not already connected
    Throws:
    ServiceAccessException - Unspecified service access error
    ServiceConnectionFailedException - Connection failed

    cacheResults

    public boolean cacheResults()
    Indicates whether or not the objects managed by this service should be cached. Caching is enabled by default.
    Specified by:
    cacheResults in interface Service
    Returns:
    boolean True if results should be cached