/**
* Load saved server configuration.
*
* <p>Currently when MyVLe object is initialized the ServerInfoRegistry will be loaded.
*/
protected void load() throws VrsException {
logger.debugPrintf(">>> load() <<<\n");
//
// use serverInfo as mutex !
//
synchronized (this.serverInfos) {
// Use new Configuration Manager
ConfigManager confMan = this.context.getConfigManager();
VRL loc = confMan.getServerRegistryLocation();
// is synchronized will return consistant list of configs
ArrayList<AttributeSet> sets = this.getInfoAttrSets();
// No Context!
ResourceLoader loader = new ResourceLoader();
XMLData xmlifier = new XMLData();
xmlifier.setVAttributeElementName("vlet:ServerInfoProperty");
xmlifier.setVAttributeSetElementName("vlet:ServerInfo");
InputStream inps;
try {
inps = loader.createInputStream(loc.toURL());
} catch (IOException e) {
throw new NestedIOException(e);
} catch (Exception e) {
throw new VRLSyntaxException(e);
}
sets = xmlifier.parseVAttributeSets(inps, XML_SERVER_CONFIG_HEADER_TAG);
// for (VAttributeSet set:sets)
// {
// logger.debugPrintln(this,"Adding ServerInfo Set:"+set);
// }
// ===
// Do not clear: just merge current with save ones !
// serverInfos.clear();
// ===
for (AttributeSet set : sets) {
ServerInfo info = new ServerInfo(context, set);
logger.debugPrintf("Adding Server Config:%s\n", info);
// actual store method:
put(info);
}
this.isLoaded = true;
}
}
/**
* Saves the ServerInfo Registry if the current configuration allows a persistant Registry !
*
* <p>By default this is false, but when MyVle is initialized by the VBrowser the persistant
* ServerInfo Registry will be enabled.
*/
public void save() {
// Check new Configuration Manager !
ConfigManager confMan = this.context.getConfigManager();
if (confMan.getUsePersistantUserConfiguration() == false) return;
VRL loc = confMan.getServerRegistryLocation();
// is synchronized will return consistant list of configs
ArrayList<AttributeSet> sets = this.getInfoAttrSets();
// ResourceLoader loader=new ResourceLoader(context);
XMLData xmlifier = new XMLData();
xmlifier.setVAttributeElementName("vlet:ServerInfoProperty");
xmlifier.setVAttributeSetElementName("vlet:ServerInfo");
// xmlifier.setPersistanteNodeElementName("vlet:ServerInfo2"); // No
// Nodes!
try {
// bootstrap warning: use default ResourceLoader here: VRS might not be initialized!
ResourceLoader writer = new ResourceLoader();
String xmlString =
xmlifier.createXMLString(XML_SERVER_CONFIG_HEADER_TAG, sets, XML_SERVER_CONFIG_HEADER);
writer.writeTextTo(loc.toURI(), xmlString);
this.isSaved = true;
} catch (Exception e) {
// check persistant user configuration:
logger.logException(ClassLogger.ERROR, e, "Couldn't save ServerInfo registry to:%s\n", loc);
// but continue!
}
}
public void removeAll() {
synchronized (this.serverInfos) {
this.isSaved = false;
this.isLoaded = false;
logger.debugPrintf(">>> ServerInfos.clear() ! <<<\n");
serverInfos.clear();
}
}
/** Put ServerInfo into registry */
private void put(ServerInfo info) {
synchronized (serverInfos) {
// store private copy !
info = info.duplicate();
updateServerInfoID(info);
logger.debugPrintf("+++ Storing info:%s\n", info);
ServerInfo prev = this.serverInfos.get(info.getID());
if (prev == info) logger.infoPrintf(">>> updating ServerInfo:%s\n", info);
else if (prev != null)
logger.infoPrintf(">>> WARNING: Overwriting previous object with:%s\n", info);
else logger.infoPrintf(">>> storing new ServerInfo:%s\n", info);
this.serverInfos.put(info.getID(), info);
// mark dirty:
this.isSaved = false;
}
}
/**
* Return 1st ServerInfo object for the specified Scheme. Is used to find *any* server of the
* specified protocol.
*
* @param scheme
* @return ServerInfo object
*/
public ServerInfo getServerInfoForScheme(String scheme) {
if (scheme == null) return null;
ServerInfo infos[] = this.getServerInfos(scheme, null);
if ((infos == null) || (infos.length <= 0)) {
logger.warnPrintf("Couldn't find server info for scheme:%s\n", scheme);
return null;
}
return infos[0];
}
public ServerInfo remove(ServerInfo info) {
if (info == null) return null;
logger.infoPrintf("--- Removing ServerInfo:%s\n", info);
ServerInfo prev = null;
synchronized (this.serverInfos) {
String key = info.getID(); // return NULL if key hasn't been
// set/info hasn't been stored !
if (key != null) prev = this.getServerInfo(key);
removeByKey(key);
return prev;
}
}
/**
* Main method to search for a Server Info object. When a search field is null it means "don't
* care". Use port number less then 0 for a don't care. Use port number EQUAL to 0 for default
* port ! Returns multiple matching ServerInfo descriptions or NULL when it can't find any
* matching server descriptions.
*
* @param scheme if NULL then don't care (match any)
* @param hostname if NULL then don't care (match any)
* @param port if port==-1 => don't care, if port==0 => default and if port>0 match explicit port
* number
* @param userInfo if NULL then don't care (match any)
*/
public ServerInfo[] getServerInfos(String scheme, String host, int port, String optUserInfo) {
logger.debugPrintf(
">>> find {scheme,host,port,user}=%s,%s,%s,%s\n", scheme, host, port, optUserInfo);
// if (scheme.compareTo("srb")==0)
// {
// logger.debugPrintln(this,"SRB"); // breakpoint
// }
ServerInfo infoArr[] = new ServerInfo[serverInfos.size()];
infoArr = this.serverInfos.values().toArray(infoArr);
Vector<ServerInfo> result = new Vector<ServerInfo>();
for (ServerInfo info : infoArr) {
logger.debugPrintf(" - comparing:%s", info);
if (info.matches(scheme, host, port, optUserInfo)) {
logger.debugPrintf(" - adding:%s\n", info);
// =========================
// Add Duplicate !
// ==========================
result.add(info.duplicate());
}
}
if (result.size() <= 0) {
logger.debugPrintf("<<< Returning NULL ServerInfos\n");
return null;
}
ServerInfo arr[] = new ServerInfo[result.size()];
arr = result.toArray(arr);
logger.debugPrintf("<<< Returning #%d ServerInfos\n", arr.length);
return arr;
}
/** Checks whether the persistent Server Info Registry is loaded and load it if necessary. */
private void checkIsLoaded() {
// use serverInfos as Mutex
synchronized (this.serverInfos) {
// Check new Configuration Manager !
ConfigManager confMan = this.context.getConfigManager();
if (confMan.getUsePersistantUserConfiguration() == false) return;
if (this.isLoaded == true) return;
try {
load();
} catch (VrsException e) {
logger.logException(ClassLogger.WARN, e, "Couldn't load ServerInfo Registry!\n");
}
}
}
/** Find ServerInfos for specified location, this can be 0 or more matches ! */
public ServerInfo[] getServerInfosFor(VRL loc) {
String host = loc.getHostname();
int port = loc.getPort();
String scheme = loc.getScheme();
String userInfo = loc.getUserinfo(); // use FULL userinformation
// no port in VRL mean => use DEFAULT, not DON'T CARE. (-1= DON'T CARE)
if (port < 0) port = 0;
ServerInfo[] infos = this.getServerInfos(scheme, host, port, userInfo);
if (infos != null)
if (infos.length > 1)
logger.warnPrintf("Warning: matched more then 1 ServerInfo for location:%s\n", loc);
// else
// logger.warnPrintf(">>> returning 1 info:"+infos[0]);
return infos;
}
@Override
public VNode createNode(VNode parent, String type, AttributeSet attrSet) throws VrsException {
if (type == null) throw new NullPointerException("Type can not be null");
if (type.compareTo(VRS.RESOURCEFOLDER_TYPE) == 0) {
ResourceFolder groupNode = null;
if (attrSet == null) groupNode = new ResourceFolder(getContext(), (VRL) null);
else groupNode = new ResourceFolder(getContext(), attrSet, (VRL) null);
return groupNode;
} else if (type.compareTo(LogicalResourceNode.PERSISTANT_TYPE) == 0) {
LogicalResourceNode node = new LogicalResourceNode(getContext(), attrSet, null);
return node;
} else {
ClassLogger.getLogger(this.getClass()).errorPrintf("***Error: unknown type:%s\n", type);
}
return null;
}
/** Stored new ServerInfo and writes to file (if persistant) Returnes updated serverInfo */
public ServerInfo store(ServerInfo info) {
logger.debugPrintf("store(): attrs=%s\n", info.getAttributeSet());
synchronized (this.serverInfos) {
// ===
// Before adding new Info: check whether persistant database is
// loaded !
// ===
checkIsLoaded();
// remove before put!
remove(info);
// synchronized put: UPDATES SERVERINFO KEY!
put(info);
// enters mutex again
save();
// do NOT return reference to object into ServerRegistry
return info.duplicate();
}
}
private static void info(String msg) {
ClassLogger.getLogger(LFCOutputStream.class).infoPrintf("%s\n", msg);
}
private static void error(String msg) {
ClassLogger.getLogger(LFCOutputStream.class).errorPrintf("%s\n", msg);
}
static {
logger = ClassLogger.getLogger(ServerInfoRegistry.class);
}
