/**
* Retrieves all relations which are 'allowed' between two specified nodes.
*
* @param snum The first objectnode type (the source)
* @param dnum The second objectnode type (the destination)
* @return An <code>Enumeration</code> of nodes containing the reldef (not typerel!) sname field
*/
protected Vector<String> getAllowedRelationsNames(int snum, int dnum) {
Vector<String> results = new Vector<String>();
for (Enumeration<MMObjectNode> e = getAllowedRelations(snum, dnum); e.hasMoreElements(); ) {
MMObjectNode node = e.nextElement();
int rnumber = node.getIntValue("rnumber");
MMObjectNode snode = mmb.getRelDef().getNode(rnumber);
results.addElement(snode.getStringValue("sname"));
}
return results;
}
/**
* Retrieves a list of Mirror Servers. This is done by obtaining a fileserver node and retrieving
* associated mmserver nodes. This method should be renamed and moved to the netfilesrv builder.
*
* @param service preseumably the service to query for. Unused.
* @return a <code>Vector</code> containing mmserver nodes that act as mirror server for this
* service
*/
public Vector getMirrorNodes(String service) {
if (mirrornodes != null) return mirrornodes;
NetFileSrv bul = (NetFileSrv) Vwms.getMMBase().getMMObject("netfilesrv");
if (bul != null) {
Enumeration e = bul.search("service=='pages'+subservice=='mirror'");
if (e.hasMoreElements()) {
MMObjectNode n1 = (MMObjectNode) e.nextElement();
mirrornodes = n1.getRelatedNodes("mmservers");
if (mirrornodes != null) return mirrornodes;
}
}
mirrornodes = new Vector();
return mirrornodes;
}
/**
* Handles a main subservice on a page. The page is scheduled to be sent to all appropriate
* mirrorsites for this service, by setting the request status in the associated mirror nodes. If
* no mirror nodes are associated with this page, nothing happens.
*
* @param filenode the netfiles node with the original (main) request
*/
public boolean doMainRequest(MMObjectNode filenode) {
// so this file has changed probably, check if the file is ready on
// disk and set the mirrors to request.
String filename = filenode.getStringValue("filename");
// find and change all the mirror nodes so they get resend
Netfiles bul = (Netfiles) Vwms.getMMBase().getMMObject("netfiles");
Enumeration e =
bul.search("WHERE filename='" + filename + "' AND service='pages' AND subservice='mirror'");
while (e.hasMoreElements()) {
MMObjectNode mirrornode = (MMObjectNode) e.nextElement();
mirrornode.setValue("status", Netfiles.STATUS_REQUEST);
mirrornode.commit();
}
return true;
}
/**
* Schedules a netfile object to be send to its mirror sites. The routine searches the appropriate
* netfile node, and sets its status to 'request'. If a node does not exits, a new node is
* created. In the latter case, the system also creates mirrornodes for each mirrorsite associated
* with this service.
*
* @param service the service to be performed
* @param subservice the subservice to be performed
* @param filename the filename to service
*/
public void handleMainCheck(String service, String subservice, String filename) {
log.debug("Reached handleMainCheck");
Netfiles bul = (Netfiles) Vwms.getMMBase().getMMObject("netfiles");
Enumeration e =
bul.search(
"WHERE filename='"
+ filename
+ "' AND service='"
+ service
+ "' AND subservice='"
+ subservice
+ "'");
if (e.hasMoreElements()) {
MMObjectNode mainnode = (MMObjectNode) e.nextElement();
mainnode.setValue("status", Netfiles.STATUS_REQUEST);
mainnode.commit();
} else {
MMObjectNode mainnode = bul.getNewNode("system");
mainnode.setValue("filename", filename);
mainnode.setValue("mmserver", Vwms.getMMBase().getMachineName());
mainnode.setValue("service", service);
mainnode.setValue("subservice", subservice);
mainnode.setValue("status", Netfiles.STATUS_REQUEST);
mainnode.setValue("filesize", -1);
bul.insert("system", mainnode);
Enumeration f = getMirrorNodes(service).elements();
while (f.hasMoreElements()) {
MMObjectNode n2 = (MMObjectNode) f.nextElement();
// hack hack also have to create mirror nodes !
mainnode = bul.getNewNode("system");
mainnode.setValue("filename", filename);
mainnode.setValue("mmserver", n2.getStringValue("name"));
mainnode.setValue("service", service);
mainnode.setValue("subservice", "mirror");
mainnode.setValue("status", Netfiles.STATUS_DONE);
mainnode.setValue("filesize", -1);
bul.insert("system", mainnode);
}
}
}
/**
* Performs general periodic maintenance. This routine handles alle open pages/main and
* pages/mirror file service requests. These requests are obtained from the netfiles builder. For
* each file that should be serviced, the filechange method is called. This routine handles a
* maximum of 10 page/main, and 50 page/mirror service calls each time it is called. The first
* time this method is call, nothing happens (?)
*
* @return <code>true</code> if maintenance was performed, <code>false</code> otherwise
*/
public boolean probeCall() {
if (first) {
// skip first time this method is called
first = false;
} else {
// handle up to 10 pages/main fileservice requests
try {
Netfiles bul = (Netfiles) Vwms.getMMBase().getMMObject("netfiles");
// Enumeration e=bul.search("WHERE service='pages' AND subservice='main' AND
// status="+Netfiles.STATUS_REQUEST+" ORDER BY number DESC");
Enumeration e =
bul.search("service=='pages'+subservice=='main'+status=" + Netfiles.STATUS_REQUEST);
int i = 0;
while (e.hasMoreElements() && i < 10) {
MMObjectNode node = (MMObjectNode) e.nextElement();
fileChange("" + node.getIntValue("number"), "c");
i++;
}
} catch (Exception e) {
log.error(Logging.stackTrace(e));
}
// handle up to 50 pages/mirror fileservice requests
try {
Netfiles bul = (Netfiles) Vwms.getMMBase().getMMObject("netfiles");
Enumeration e =
bul.search("service=='pages'+subservice=='mirror'+status=" + Netfiles.STATUS_REQUEST);
// Enumeration e=bul.search("WHERE service='pages' AND subservice='mirror' AND
// status="+Netfiles.STATUS_REQUEST+" ORDER BY number DESC");
int i = 0;
while (e.hasMoreElements() && i < 50) {
MMObjectNode node = (MMObjectNode) e.nextElement();
fileChange("" + node.getIntValue("number"), "c");
i++;
}
} catch (Exception e) {
log.error(Logging.stackTrace(e));
}
}
return true;
}