Examples of net.jini.core.lookup.ServiceRegistrar

net.jini.core.lookup.ServiceRegistrar
Defines the interface to the lookup service. The interface is not a remote interface; each implementation of the lookup service exports proxy objects that implement the ServiceRegistrar interface local to the client, using an implementation-specific protocol to communicate with the actual remote server. All of the proxy methods obey normal RMI remote interface semantics except where explicitly noted. Two proxy objects are equal if they are proxies for the same lookup service. Every method invocation (on both ServiceRegistrar and ServiceRegistration) is atomic with respect to other invocations. @author Sun Microsystems, Inc. @see ServiceRegistration @since 1.0

     *  discovered.
     */
    protected ServiceRegistrar[] getRegsToDiscover(ArrayList useList) {
        ArrayList regsList = new ArrayList();
        for(int i=0;i<useList.size();i++) {
            ServiceRegistrar reg = 
                   ( ((DiscoveryStruct)(useList.get(i))).regGroups ).reg;
            if(reg == null)  continue;
            regsList.add(reg);
        }
        return (ServiceRegistrar[])(regsList).toArray

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  }
  int len = proxys.length;
  if(len == 0 ) return null;
  int rand = Math.abs(random.nextInt()) % len;
  for(int i=0; i<len; i++) {
      ServiceRegistrar proxy = proxys[(i + rand) % len];
      ServiceItem sItem = null;
      try {
                int maxMatches = ( (filter != null) ? Integer.MAX_VALUE : 1 );
    ServiceMatches sm = proxy.lookup(tmpl, maxMatches);
    sItem = getMatchedServiceItem(sm, filter);
      } catch(Exception e) {
                logger.log(Level.INFO,
                           "Exception occurred during query, discarding proxy",
                           e);

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  if(len > 0) {
            /* loop thru the set of lookups, randomly selecting each lookup */
      int rand = (Math.abs(random.nextInt())) % len;
      for(int i=0; i<len; i++) {
                int max = maxMatches;
    ServiceRegistrar proxy = proxys[(i + rand) % len];
    try {
                    /* If a filter is to be applied (filter != null), then
                     * the value of the maxMatches parameter will not
                     * suffice when querying the current lookup service.
                     * This is because although services returned from a
                     * query of the lookup service will match the template,
                     * some of those services may get filtered out. Thus,
                     * asking for exactly maxMatches may result in fewer
                     * matching services than actually are contained in
                     * the lookup. Thus, all matching services are
                     * requested by passing in "infinity" for the maximum
                     * number of matches (Integer.MAX_VALUE).
                     */
                    if(filter != null) max = Integer.MAX_VALUE;
                    /* Query the current lookup for matching service(s). */
        ServiceMatches sm = proxy.lookup(tmpl, max);
        int nItems = sm.items.length;
        if(nItems == 0) continue;//no matches, query next lookup
                    /* Loop thru the matching services, randomly selecting
                     * each service, applying the filter if appropriate,
                     * and making sure the service has not already been

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                super(reg, seqN);
    this.eReg = eReg;
      }
            public void run() {
                logger.finest("ServiceDiscoveryManager - LookupTask started");
    ServiceRegistrar proxy = reg.proxy;
    ServiceMatches matches;
                /* For the given lookup, get all services matching the tmpl */
    try {
        matches = proxy.lookup(tmpl, Integer.MAX_VALUE);
    } catch (Exception e) {
                    boolean cacheTerminated;
                    synchronized(serviceIdMap) {
      eReg.lookupsPending--;
                        cacheTerminated = bCacheTerminated;

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            }//end constructor


            public void run() {
                logger.finest("ServiceDiscoveryManager - UnmapProxyTask "
                              +"started");
    ServiceRegistrar proxy = null;
                ServiceItem item;
                synchronized(itemReg) {
                    item = itemReg.removeProxy(reg.proxy);//disassociate the LUS
        if (item != null) {// new LUS chosen to track changes
      proxy = itemReg.proxy;

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                                               (oldDesiredRegs,regInfo);  // f.
                HashMap discardRegs = new HashMap(undesiredRegs.size());
                for(Iterator itr = (undesiredRegs.keySet()).iterator();
                                                              itr.hasNext(); )
                {
                    ServiceRegistrar reg = (ServiceRegistrar)itr.next();
                    (regInfo.discoveredRegsMap).remove(reg);              // g.
                    discardRegs.put(reg,
                    ((LocatorGroupsStruct)allDiscoveredRegs.get(reg)).groups);


                }//end loop

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                 */
                HashMap discardRegs = new HashMap(undesiredRegs.size());
                for(Iterator itr = (undesiredRegs.keySet()).iterator();
                                                              itr.hasNext(); )
                {
                    ServiceRegistrar reg = (ServiceRegistrar)itr.next();
                    (regInfo.discoveredRegsMap).remove(reg);
                    discardRegs.put(reg,
                    ((LocatorGroupsStruct)allDiscoveredRegs.get(reg)).groups);
                }//end loop
                /* Construct the registrars-to-groups map for the event */

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  logger.log(Level.FINE, 
       "querying the lookup service "
       +"to verify all service registrations ...");
  ArrayList lusList = getLookupListSnapshot
      ("impl.joinmanager.RegisterStorm");
  ServiceRegistrar reg = (ServiceRegistrar)lusList.get(0);
  /* Verify nServices registered with lookup service 0 */
  ServiceMatches matches = reg.lookup(template,
              Integer.MAX_VALUE);
  int nRegServices = matches.totalMatches;
  logger.log(Level.FINE, "# of services expected   = " + nServices);
  logger.log(Level.FINE, "# of services registered = " + nRegServices);
  if(nServices != nRegServices) {

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        LookupLocator[] locs = toLocatorArray(lookupsStarted);
        mainListener.setLookupsToDiscover(lookupsStarted, locs);
        ldm = getLookupDiscoveryManager(locs);
        waitForDiscovery(mainListener);//won't get past here if discovery fails
        /* lookup service */
        ServiceRegistrar lus = (ldm.getRegistrars())[0];
        /* default maximum lease duration from the lookup service */
        int idSeed  = SERVICE_BASE_VALUE + 9999;
        long lowBits = (1000+idSeed) >> 32;
        long leastSignificantBits = SERVICE_ID_VARIANT | lowBits;
        ServiceID testID =
                    new ServiceID( SERVICE_ID_VERSION, leastSignificantBits );
        ServiceRegistration srvcReg =
                      lus.register(new ServiceItem(testID,testService,null),
                                   Long.MAX_VALUE);
        Lease srvcLease = null;
        srvcReg = (ServiceRegistration) getConfig().prepare
                                    ("test.reggieServiceRegistrationPreparer",
                                     srvcReg);

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         */
        HashMap regsToAdd = new HashMap(regsMap.size());
        Set eSet = regsMap.entrySet();
        for(Iterator itr = eSet.iterator(); itr.hasNext(); ) {
            Map.Entry pair = (Map.Entry)itr.next();
            ServiceRegistrar reg = (ServiceRegistrar)pair.getKey();
            LocatorGroupsStruct curStructVal
                                      = (LocatorGroupsStruct)pair.getValue();
            /* If regInfo wants ALL_GROUPS, then every registrar is desired */
            if(regInfo.groups == null) { // ALL_GROUPS
                regsToAdd.put(reg,curStructVal);

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