arlut.csd.ganymede.client
Class Loader

java.lang.Object
  |
  +--java.lang.Thread
        |
        +--arlut.csd.ganymede.client.Loader

All Implemented Interfaces:

java.lang.Runnable

public class Loader

extends java.lang.Thread

Client-side thread class for loading object and field type definitions from the server in the background during the client's start-up.

Field Summary

private java.util.Hashtable	baseHash
private boolean	baseHashLoaded
private java.util.Vector	baseList
private boolean	baseListLoaded
private java.util.Hashtable	baseMap
private boolean	baseMapLoaded
private java.util.Hashtable	baseNames
private boolean	baseNamesLoaded
private java.util.Hashtable	baseToShort
private boolean	debug
private boolean	keepGoing
private java.util.Hashtable	nameShorts
private arlut.csd.ganymede.Session	session
private java.util.Hashtable	templateHash Hash mapping Short object type id's to Vectors of FieldTemplate's, used by the client to quickly look up information about fields in order to populate containerPanel's.
private boolean	templateLoading
private java.util.Hashtable	templateNameHash Hash mapping Short object type id's to a Hash that maps field name to FieldTemplate object

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Loader(arlut.csd.ganymede.Session session, boolean debug)

Method Summary

void	cleanUp() Clear out all information in the loader
void	clear() Clear out all the information in the loader, and spawn a new loader thread to download new information from the server.
private void	constructTemplateNameHash(java.lang.Short objectId, java.util.Vector fieldTemplates)
java.util.Vector	getBaseList() Returns a Vector of BaseDump objects, providing a local cache of Base references that the client consults during operations.
java.util.Hashtable	getBaseMap() Returns a hash mapping Short Base id's to BaseDump objects.
java.util.Hashtable	getBaseNames() Returns a hash mapping BaseDump references to their title.
java.util.Hashtable	getBaseToShort() Returns a hashtable mapping BaseDump references to their object type id in Short form.
arlut.csd.ganymede.FieldTemplate	getFieldTemplate(short objectid, java.lang.String fieldname) Returns a FieldTemplate for a field specified by object type id and field name.
arlut.csd.ganymede.FieldTemplate	getFieldTemplate(java.lang.Short objectid, java.lang.String fieldname) Returns a FieldTemplate for a field specified by object type id and field name.
java.util.Hashtable	getNameToShort() Returns a hashtable mapping base names to their object type id in Short form.
java.lang.String	getObjectType(arlut.csd.ganymede.Invid objId) Returns the type name for a given object.
java.util.Vector	getTemplateVector(short id) Returns a vector of FieldTemplate's.
java.util.Vector	getTemplateVector(java.lang.Short id) Returns a vector of FieldTemplate's listing fields and field informaton for the object type identified by id.
private void	loadBaseHash() loadBaseHash is used to prepare a hash table mapping Bases to Vector's of BaseField..
private void	loadBaseList() loadBaseList gets the list of types from the server.
private void	loadBaseMap() loadBaseMap() generates baseMap, a mapping of Short's to the corresponding remote base reference.
private void	loadBaseNames() loadBaseNames constructs a hashtable mapping Base references to base names.
void	run()

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

debug

private boolean debug

baseMap

private java.util.Hashtable baseMap

baseNames

private java.util.Hashtable baseNames

baseHash

private java.util.Hashtable baseHash

baseToShort

private java.util.Hashtable baseToShort

nameShorts

private java.util.Hashtable nameShorts

baseList

private java.util.Vector baseList

keepGoing

private boolean keepGoing

baseNamesLoaded

private boolean baseNamesLoaded

baseListLoaded

private boolean baseListLoaded

baseMapLoaded

private boolean baseMapLoaded

templateLoading

private boolean templateLoading

baseHashLoaded

private boolean baseHashLoaded

session

private arlut.csd.ganymede.Session session

templateHash

private java.util.Hashtable templateHash

Hash mapping Short object type id's to Vectors of FieldTemplate's, used by the client to quickly look up information about fields in order to populate containerPanel's.

This hash is used by getTemplateVector.

templateNameHash

private java.util.Hashtable templateNameHash

Hash mapping Short object type id's to a Hash that maps field name to FieldTemplate object

Constructor Detail

Loader

public Loader(arlut.csd.ganymede.Session session,
              boolean debug)

Method Detail

run

public void run()

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

clear

public void clear()

Clear out all the information in the loader, and spawn a new loader thread to download new information from the server.

cleanUp

public void cleanUp()

Clear out all information in the loader

getObjectType

public java.lang.String getObjectType(arlut.csd.ganymede.Invid objId)

Returns the type name for a given object.

If the loader thread hasn't yet downloaded that information, this method will block until the information is available.

getBaseList

public java.util.Vector getBaseList()

Returns a Vector of BaseDump objects, providing a local cache of Base references that the client consults during operations.

If this thread hasn't yet downloaded that information, this method will block until the information is available.

getBaseNames

public java.util.Hashtable getBaseNames()

Returns a hash mapping BaseDump references to their title.

If this thread hasn't yet downloaded that information, this method will block until the information is available.

getBaseMap

public java.util.Hashtable getBaseMap()

Returns a hash mapping Short Base id's to BaseDump objects.

If this thread hasn't yet downloaded that information, this method will block until the information is available.

getBaseToShort

public java.util.Hashtable getBaseToShort()

Returns a hashtable mapping BaseDump references to their object type id in Short form. This is a holdover from a time when the client didn't create local copies of the server's Base references.

If this thread hasn't yet downloaded that information, this method will block until the information is available.

getNameToShort

public java.util.Hashtable getNameToShort()

Returns a hashtable mapping base names to their object type id in Short form. This is used by the XML client to quickly map object type names to the numeric type id.

If this thread hasn't yet downloaded that information, this method will block until the information is available.

getFieldTemplate

public arlut.csd.ganymede.FieldTemplate getFieldTemplate(short objectid,
                                                         java.lang.String fieldname)

Returns a FieldTemplate for a field specified by object type id and field name.

getFieldTemplate

public arlut.csd.ganymede.FieldTemplate getFieldTemplate(java.lang.Short objectid,
                                                         java.lang.String fieldname)

Returns a FieldTemplate for a field specified by object type id and field name.

getTemplateVector

public java.util.Vector getTemplateVector(short id)

Returns a vector of FieldTemplate's.

Parameters:

id - Object type id to retrieve field information for.

getTemplateVector

public java.util.Vector getTemplateVector(java.lang.Short id)

Returns a vector of FieldTemplate's listing fields and field informaton for the object type identified by id.

Parameters:

id - The id number of the object type to be returned the base id.

constructTemplateNameHash

private void constructTemplateNameHash(java.lang.Short objectId,
                                       java.util.Vector fieldTemplates)

loadBaseList

private void loadBaseList()
                   throws java.rmi.RemoteException

loadBaseList gets the list of types from the server. This is used in loadBaseHash to get the rest of the BaseHash, but is also used in a few places in the client where the whole list of fields in the baseHash isn't needed.

java.rmi.RemoteException

loadBaseNames

private void loadBaseNames()
                    throws java.rmi.RemoteException

loadBaseNames constructs a hashtable mapping Base references to base names. This is intended to serve as a local cache to avoid having to do round-trip calls to the server just to get a Base reference's name.

java.rmi.RemoteException

loadBaseHash

private void loadBaseHash()
                   throws java.rmi.RemoteException

loadBaseHash is used to prepare a hash table mapping Bases to Vector's of BaseField.. this is used to allow different pieces of client-side code to get access to the Base/BaseField information, which changes infrequently (not at all?) while the client is connected.. the perm_editor panel created by the windowPanel class benefits from this, as does buildTree() below.

java.rmi.RemoteException

loadBaseMap

private void loadBaseMap()
                  throws java.rmi.RemoteException

loadBaseMap() generates baseMap, a mapping of Short's to the corresponding remote base reference.

java.rmi.RemoteException