Class semper.archive.ArchiveMan 
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Class semper.archive.ArchiveMan 

java.lang.Object
   |
   +----semper.archive.ArchiveMan
public class ArchiveMan
extends Object
Archive Manager. Main component of the archive service block, that class gives the means for storing and retrieving objects in the SEMPER archive.

All the objects are stored into the same base :
  • ArGeneral.db

    Other specific bases :
  • ArContext.db : used to store data relative to the archive manager,
  • ArWaste.db : the waste basket base,
  • ArLog.db : the log base.

    The path for the location of the database files is given by the semper configuration file (see semper.Preferences.Configuration), field semper.archive.dbDir.
    The default location is ./database/
    Version:
    $Revision: 1.21 $ $Date: 1997/02/07 10:17:55 $
    Author:
    Marc Mazoue ([email protected])

    Constructor Index

    o ArchiveMan()
    Prevents instantiation of objects of this class.

    Method Index

    o add(AccessName, int, int, Date, Object)
    Add the given object to the archive.
    The handle for further retrieval is the given access name.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    o contains(AccessName)
    Tells if there is an object associated with the given access name in the archive.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    o del(AccessName)
    Removes from the archive the object associated with the specified access name.
    o getAvailabilityReq(AccessName)
    Get the 'security requirement' storage attributes of the archived object associated with the specified access name.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    o getExpiryDate(AccessName)
    Get the 'security requirement' storage attributes of the archived object associated with the specified access name.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    o getSecurityReq(AccessName)
    Get the 'security requirement' storage attributes of the archived object associated with the specified access name.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    o getSerialNumber()
    Gives the next available serial number
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    o init()
    Initialises the static archive manager.
    o isInitialised()
    Checks whether the archive manager has been initialised
    o log(AccessName, Streamable)
    Add the given object to the log base.
    o modifyAttr(AccessName, int, int, Date)
    Modify the storage attributes of the archived object associated with the specified access name.
    The object itself and the date of storage are not modified.
    o read(AccessName)
    Gets from the archive the object associated with the specified access name.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    o readLog()
    Read the log base.
    o search(String)
    This version of search returns an array of Strings ; another version called vSearch (see below) returns a Vector of AccessName objects

    Search in the archive for all access names that include the given token (a partial access name).
    Note, to get the whole list of access names, use [search ""]
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    o search(String, Date, Date)
    This version of search returns an array of Strings ; another version called vSearch (see below) returns a Vector of AccessName objects

    Search in the archive for all access names that include the given token (a partial access name) according the given time window.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    o update(AccessName, Object)
    Updates in the archive the object associated with the specified access name.
    The storage attributes (security requirement, availability requirement and expiry date) are kept.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    o vSearch(String)
    Search in the archive for all access names that include the given token (a partial access name).
    Note, to get the whole list of access names, use [search ""]
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    o vSearch(String, Date, Date)
    Search in the archive for all access names that include the given token (a partial access name) according the given time window.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.

    Constructors

    o ArchiveMan 
      public ArchiveMan() throws ArchiveManException
    Prevents instantiation of objects of this class. All the methods of ArchiveMan are class methods.
    Throws: ArchiveManException
    when this method is called.

    Methods

    o isInitialised 
      public static boolean isInitialised()
    Checks whether the archive manager has been initialised
    o init 
      public static void init() throws ArchiveManException
    Initialises the static archive manager.
    Throws: ArchiveManException
    throwed when DatabaseException is caught.
    o getSerialNumber 
      public static synchronized long getSerialNumber() throws ArchiveManException
    Gives the next available serial number
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Returns:
    a long integer serial number
    Throws: ArchiveManException
    throwed when DatabaseException is caught.
    o add 
      public static synchronized void add(AccessName a_n,
                                      int security_req,
                                      int availability_req,
                                      Date expiry_date,
                                      Object obj) throws ArchiveManException, ArchiveOverwriteException, ArchiveObjNotFoundException
    Add the given object to the archive.
    The handle for further retrieval is the given access name.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    a_n - the reference to the object to be stored
    security_req - the level of security required
    For the moment, the security requirement is figured by an integer
    0 : simple storage
    1 : user's password required for store and retrieve
    2 : encrypted storage
    availability_req - the level of availability required,
    For the moment, The availability requirement is figured by an integer
    0 : backup of the stored data is not required
    1 : backup of the stored data is required
    expiry_date - the date used for further archive garbage collections
    If this parameter is null the date is set to the particular value 0 and the object will never be removed by garbage collection.
    obj - the object to be archived
    Throws: ArchiveManException
    throwed when DatabaseException is caught or the security_req argument has a bad value or the capability for add() is not satisfied.
    Throws: ArchiveOverwriteException
    throwed when trying to add an object the access name of which is already in archive.
    o read 
      public static synchronized Object read(AccessName a_n) throws ArchiveManException, ArchiveObjNotFoundException
    Gets from the archive the object associated with the specified access name.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    a_n - the reference to the stored object.
    Returns:
    the handle of the object
    Throws: ArchiveManException
    throwed when DatabaseException is caught or the capability for read the object is not satisfied.
    Throws: ArchiveObjNotFoundException
    throwed when trying to read an object the access name of which is not in archive.
    o update 
      public static synchronized void update(AccessName a_n,
                                         Object new_obj) throws ArchiveManException, ArchiveObjNotFoundException
    Updates in the archive the object associated with the specified access name.
    The storage attributes (security requirement, availability requirement and expiry date) are kept.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    access_name - the reference to the stored object.
    new_obj - the object to be updated
    Throws: ArchiveManException
    throwed when DatabaseException is caught or the capability for update() is not satisfied.
    Throws: ArchiveObjNotFoundException
    throwed when trying to update an object the access name of which is not in archive.
    o modifyAttr 
      public static synchronized void modifyAttr(AccessName a_n,
                                             int security_req,
                                             int availability_req,
                                             Date expiry_date) throws ArchiveManException, ArchiveObjNotFoundException
    Modify the storage attributes of the archived object associated with the specified access name.
    The object itself and the date of storage are not modified. But, regarding the old and the new security requirement, the way of storage can be changed, e.g., simply stored -> stored with encryption.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    a_n - the reference to the object to be stored
    security_req - the level of security required
    For the moment, the secutity requirement is figured by an integer
    0 : simple storage
    1 : user's password required for store and retrieve
    2 : encrypted storage
    availability_req - the level of availability required, For the moment, The availability requirement is figured by an integer
    0 : backup of the stored data is not required
    1 : backup of the stored data is required
    expiry_date - the date used for further archive garbage collections
    Throws: ArchiveManException
    throwed when DatabaseException is caught or the capability for modifyAttr() is not satisfied.
    Throws: ArchiveObjNotFoundException
    throwed when trying to modify the storage attributes of an object the access name of which is not in archive.
    o getSecurityReq 
      public static synchronized int getSecurityReq(AccessName a_n) throws ArchiveManException, ArchiveObjNotFoundException
    Get the 'security requirement' storage attributes of the archived object associated with the specified access name.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    a_n - the reference to the object to be stored
    Returns:
    the 'security requirement' storage attributes of the object.
    Throws: ArchiveManException
    throwed when DatabaseException is caught.
    Throws: ArchiveObjNotFoundException
    throwed when trying to get the storage attributes of an object the access name of which is not in archive.
    o getAvailabilityReq 
      public static synchronized int getAvailabilityReq(AccessName a_n) throws ArchiveManException, ArchiveObjNotFoundException
    Get the 'security requirement' storage attributes of the archived object associated with the specified access name.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    a_n - the reference to the object to be stored
    Returns:
    the 'security requirement' storage attributes of the object.
    Throws: ArchiveManException
    throwed when DatabaseException is caught.
    Throws: ArchiveObjNotFoundException
    throwed when trying to get the storage attributes of an object the access name of which is not in archive.
    o getExpiryDate 
      public static synchronized Date getExpiryDate(AccessName a_n) throws ArchiveManException, ArchiveObjNotFoundException
    Get the 'security requirement' storage attributes of the archived object associated with the specified access name.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    a_n - the reference to the object to be stored
    Returns:
    the 'security requirement' storage attributes of the object.
    Throws: ArchiveManException
    throwed when DatabaseException is caught.
    Throws: ArchiveObjNotFoundException
    throwed when trying to get the storage attributes of an object the access name of which is not in archive.
    o del 
      public static synchronized void del(AccessName a_n) throws ArchiveManException, ArchiveObjNotFoundException
    Removes from the archive the object associated with the specified access name. The removed object is put in the waste basket database file.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    access_name - the reference to the stored object.
    Throws: ArchiveManException
    throwed when DatabaseException is caught.
    o search 
      public static synchronized String[] search(String token) throws ArchiveManException
    This version of search returns an array of Strings ; another version called vSearch (see below) returns a Vector of AccessName objects

    Search in the archive for all access names that include the given token (a partial access name).
    Note, to get the whole list of access names, use [search ""]
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    token - the string to be searched in the access names
    Returns:
    the set of fitting access names Strings
    Throws: ArchiveManException
    throwed when DatabaseException is caught.
    o search 
      public static synchronized String[] search(String token,
                                             Date start_date,
                                             Date end_date) throws ArchiveManException
    This version of search returns an array of Strings ; another version called vSearch (see below) returns a Vector of AccessName objects

    Search in the archive for all access names that include the given token (a partial access name) according the given time window.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    token - the string to be searched in the access names
    start_date - the begining of time window for the search.
    end_date - the end of time window for the search.
    Returns:
    the set of fitting access names Strings
    Throws: ArchiveManException
    throwed when DatabaseException is caught.
    o vSearch 
      public static synchronized Vector vSearch(String token) throws ArchiveManException
    Search in the archive for all access names that include the given token (a partial access name).
    Note, to get the whole list of access names, use [search ""]
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    token - the string to be searched in the access names
    Returns:
    as a Vector the set of fitting access names Strings
    Throws: ArchiveManException
    throwed when DatabaseException is caught.
    o vSearch 
      public static synchronized Vector vSearch(String token,
                                            Date start_date,
                                            Date end_date) throws ArchiveManException
    Search in the archive for all access names that include the given token (a partial access name) according the given time window.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    token - the string to be searched in the access names
    start_date - the begining of time window for the search.
    end_date - the end of time window for the search.
    Returns:
    as a Vector the set of fitting access names Strings
    Throws: ArchiveManException
    throwed when DatabaseException is caught.
    o contains 
      public static synchronized boolean contains(AccessName a_n) throws ArchiveManException
    Tells if there is an object associated with the given access name in the archive.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    access_name - the reference to the object to be looked for
    Returns:
    true if the object is present in the archive, false otherwise.
    Throws: ArchiveManException
    throwed when DatabaseException is caught.
    o log 
      public static synchronized void log(AccessName a_n,
                                      Streamable obj) throws ArchiveManException
    Add the given object to the log base. The current date is added to the access name.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Parameters:
    access_name - the reference to the object to be stored
    obj - the object to be archived
    Throws: ArchiveManException
    throwed when DatabaseException is caught.
    o readLog 
      public static synchronized void readLog() throws ArchiveManException
    Read the log base. Not yet implemented.
    The Archive Manager must be initialized before calling this method, otherwise an exception is risen.
    Throws: ArchiveManException
    throwed when this method is called (function readLog not implemented). 
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