org.mmbase.module.builders
Class Netfiles

java.lang.Object
  |
  +--org.mmbase.module.core.MMTable
        |
        +--org.mmbase.module.core.MMObjectBuilder
              |
              +--org.mmbase.module.builders.Netfiles

public class Netfiles

extends MMObjectBuilder

The Netfiles builder stores information on files that need to be transferred to other servers. It is used in the CACHE PAGE routine, that is used to cache SCAN pages. Information in NetFiles is used by a numbe rof VWMs (i.e. (PageMaster and ImageMaster), which schedules the transfer of the files.
Each NetFile entry contains teh following information:

• code>filename : the name of the file
• code>mmserver : the server that should handle the file transfer
• code>service : the main 'service' to be performed. Together with subservice, this determines the VWM that handles the transfer, i.e. 'pages/main' is handled by the PageMaster VWM.
• code>subservice : the subservice to perform. i.e. in PageMaster, 'main' determines mirror sites and schedules tasks for mirroring (by creating net netfile entries), while 'mirror' performs the actual transfer to a mirror
Often one VWM handles mutliple subservices, but this is not a given.
• code>filesize : the size of the file. Not currently used, value is always -1
• code>ctime : probably the time of creation. Currently not used (for future development).
• code>ntime : probably the last change time. Currently not used (for future development).
• code>status : The state of the netfile entry. This can be a STATUS_REQUEST when a file waits to be transferred, STATUS_ON_ITS_WAY when it is being transferred, STATUS_DONE when the transfer was handled, STATUS_CHANGED when a change occurerd in a file, (indicating it may become elligible for resending), and STATUS_CALC_PAGE when the page needs to be recalculated (by SCAN).
• code>crc : Cyclic Redundancy Check. For use in checking file validity. Currently not used (for future development)

Version:

12 Mar 1997

Author:

Daniel Ockeloen

Field Summary

static int	STATUS_CALC_PAGE Status for a netfile indicating a request to be recalculated
static int	STATUS_CHANGED Status for a netfile indicating a change
static int	STATUS_DONE Status for a netfile indicating its request has been handled
static int	STATUS_ON_ITS_WAY Status for a netfile indicating its request is being handled
static int	STATUS_REQUEST Status for a netfile indicating a service request

Fields inherited from class org.mmbase.module.core.MMObjectBuilder

broadcastChanges, className, database, debug, description, descriptions, fields, NODE_MAX_SIZE, nodeCache, obj2type, OBJ2TYPE_MAX_SIZE, oType, replaceCache, searchAge, sortedDBLayout, TEMPNODE_DEFAULT_SIZE, TemporaryNodes, virtual

Fields inherited from class org.mmbase.module.core.MMTable

mmb, tableName

Constructor Summary

Netfiles()

Method Summary

java.lang.String	getGUIIndicator(java.lang.String field, MMObjectNode node) What should a GUI display for this node/field combo.
boolean	nodeLocalChanged(java.lang.String machine, java.lang.String number, java.lang.String builder, java.lang.String ctype) Called when a local node is changed.
boolean	nodeRemoteChanged(java.lang.String machine, java.lang.String number, java.lang.String builder, java.lang.String ctype) Called when a remote node is changed.

Methods inherited from class org.mmbase.module.core.MMObjectBuilder

addField, addLocalObserver, addRemoteObserver, buildSet, checkAddTmpField, commit, convertMMNode2SQL, count, create, createAlias, created, debug, deleteNodeCache, executeFunction, fieldLocalChanged, getAge, getAliasedNode, getCacheNumbers, getCacheSize, getCacheSize, getClassName, getDBByte, getDBKey, getDBState, getDBText, getDBType, getDefaultTeaser, getDefaultUrl, getDescription, getDescriptions, getDutchSName, getEditFields, getField, getFieldNames, getFields, getFullTableName, getFunctionParameters, getGUIIndicator, getHardNode, getHardNode, getHTML, getInitParameter, getInitParameters, getList, getMachineName, getMaintainer, getNewNode, getNewTmpNode, getNextField, getNode, getNode, getNode, getNode, getNodeType, getNumberFromName, getPluralName, getPluralName, getPluralNames, getRelations_main, getSearchAge, getShort, getShortedByte, getShortedText, getSingularName, getSingularName, getSingularNames, getSmartPath, getSortedFields, getSortedListFields, getTableName, getTmpNode, getURLEncode, getValue, getVersion, getWAP, getXMLPath, getXMLSetup, hostname_function, init_obj2type, init, insert, insert, insertDone, isNodeCached, isVirtual, isXMLConfig, preCommit, preEdit, process, putTmpNode, readSearchResults, removeField, removeNode, removeRelations, removeTmpNode, replace, safeCache, safeCommit, safeInsert, search, search, search, searchIn, searchIn, searchIn, searchNumbers, searchVector, searchVector, searchVector, searchVector, searchVectorIn, searchVectorIn, searchVectorIn, searchVectorIn, searchWithWhere, sendFieldChangeSignal, setClassName, setDBLayout_xml, setDBLayout, setDebug, setDefaults, setDescription, setDescriptions, setDutchSName, setInitParameter, setMaintainer, setMMBase, setPluralNames, setSearchAge, setSingularNames, setTableName, setValue, setValue, setVersion, setXmlConfig, setXMLPath, setXMLValues, signalNewObject, testValidData, toXML, waitUntilNodeChanged, wrap

Methods inherited from class org.mmbase.module.core.MMTable

size

Methods inherited from class java.lang.Object

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

Field Detail

STATUS_REQUEST

public static final int STATUS_REQUEST

Status for a netfile indicating a service request

STATUS_ON_ITS_WAY

public static final int STATUS_ON_ITS_WAY

Status for a netfile indicating its request is being handled

STATUS_DONE

public static final int STATUS_DONE

Status for a netfile indicating its request has been handled

STATUS_CHANGED

public static final int STATUS_CHANGED

Status for a netfile indicating a change

STATUS_CALC_PAGE

public static final int STATUS_CALC_PAGE

Status for a netfile indicating a request to be recalculated

Constructor Detail

Netfiles

public Netfiles()

Method Detail

getGUIIndicator

public java.lang.String getGUIIndicator(java.lang.String field,
                                        MMObjectNode node)

What should a GUI display for this node/field combo. For "status', it returns a description of the current netfile state. Otherwise it returns null.

Overrides:

getGUIIndicator in class MMObjectBuilder

Parameters:

node - The node to display

field - the name field of the field to display

Returns:

the display of the node's field as a String, null if not specified

nodeRemoteChanged

public boolean nodeRemoteChanged(java.lang.String machine,
                                 java.lang.String number,
                                 java.lang.String builder,
                                 java.lang.String ctype)

Called when a remote node is changed. This routine invokes the NetFileServ builder to handle the change (which involves calling the VWM that handles the service). Only active for certain servers. The check what servers support this is currently specific for the VPRO and should be changed.

Overrides:

nodeRemoteChanged in class MMObjectBuilder

Parameters:

number - Number of the changed node as a String

builder - type of the changed node

ctype - command type, 'c'=changed, 'd'=deleted', 'r'=relations changed, 'n'=new

Returns:

true if maintenance was performed, false (the default) otherwise

nodeLocalChanged

public boolean nodeLocalChanged(java.lang.String machine,
                                java.lang.String number,
                                java.lang.String builder,
                                java.lang.String ctype)

Called when a local node is changed. This routine invokes the NetFileServ builder to handle the change (which involves calling the VWM that handles the service). Only active for certain servers. The check what servers support this is currently specific for the VPRO and should be changed.

Overrides:

nodeLocalChanged in class MMObjectBuilder

Parameters:

number - Number of the changed node as a String

builder - type of the changed node

ctype - command type, 'c'=changed, 'd'=deleted', 'r'=relations changed, 'n'=new

Returns:

true if maintenance was performed, false (the default) otherwise