Examples of de.desy.tine.client.TLink

de.desy.tine.client.TLink
TLink.java User interface calls to access tine data links. The methods presented here deal with linking local application data with remote data sources. Primarily you will need to create a TLink object, passing the necessary identifying parameters of the remote server to which the link is to be established. When the TLink object is instantiated, you will then need to retrieve the data using one of the retrieval methods, e.g. execute() for synchronous acquisition, or attach() for asynchronous acquisition, or receive() for the acquisition of network globals.

  private static int getNumberOf(String property,String target,int timeout) throws IOException
  {
    int cc = TErrorList.non_existent_elem;
    short[] n = new short[1];
    TDataType dout;
    TLink tl;
    String propertyq;
    
    if (property == null || target == null) return -TErrorList.argument_list_error;
   
    dout = new TDataType(n);
    propertyq = new String("N" + property); 
    try
    {
      tl = new TLink(target,propertyq,dout,null,TAccess.CA_READ);
      cc = tl.execute(timeout,true);
      srvAddr = tl.srvAddr;
      tl.close();
    }
    catch (Exception e)
    {
      cc = TErrorList.host_not_resolved;
    }

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    if (!TLinkFactory.getInstance().isRunningStandAlone())
    {    
      int cc,n,i;
      TDataType dout;
      TDataType din;
      TLink tl;
      NAME32[] taglist32;
      String[] strlist;
  
      if (serverName == null || serverName.compareToIgnoreCase("ALL") == 0)
      {
        din = new TDataType();
      }
      else if (importance == null)
      {
        din = new TDataType(serverName);
      }
      else
      {
        if (importance.length() == 0) importance = "ALL";
        NAME32[] n32a = new NAME32[2];
        n32a[0] = new NAME32(serverName);
        n32a[1] = new NAME32(importance);
        din = new TDataType(n32a);
      }
      taglist32 = new NAME32[niceContextsQuerySize];
      for (i=0; i<niceContextsQuerySize; i++) taglist32[i] = new NAME32();
      if (taglist32.length == 0) return null;
      dout = new TDataType(taglist32);
      tl = new TLink("/SITE/ENS","CONTEXTS",dout,din,TAccess.CA_READ);
      cc = tl.execute(TLink.defaultTimeout,true);
      tl.close();
      n = dout.getCompletionLength();
      if (cc == 0)
      { // this worked, so we're finished 
        strlist = new String[n];
        for (i=0; i<n; i++) strlist[i] = taglist32[i].name;

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      al.add("\tclient-side sck recv buffers: "+tsrvs.getClnRecvBuffers());
    }


    int rc;
    boolean isOffline = false;
    TLink lnk;
    TDataType tdt;
    NAME32[] n32 = new NAME32[100];
    al.add("security :");
    tdt = new TDataType(n32);
    lnk = new TLink(tgt,"USERS",tdt,null,TAccess.CA_READ);    
    rc = lnk.executeAndClose();
    if (rc == TErrorList.link_timeout || rc == TErrorList.connection_timeout)
      isOffline = true;
    if (rc == 0 && tdt.getCompletionLength() > 0)
    {
      al.add("WRITE access open to Users : ");
      for (int i=0; i<tdt.getCompletionLength(); i++)
        al.add("\t"+n32[i].name);
    }
    else
    {
      if (!isOffline) al.add("WRITE access open to : ALL users");
    }
    lnk = new TLink(tgt,"IPNETS",tdt,null,TAccess.CA_READ);    
    rc = isOffline ? TErrorList.connection_timeout : lnk.executeAndClose();
    if (rc == 0 && tdt.getCompletionLength() > 0)
    {
      al.add("WRITE access open to Network Addresses : ");
      for (int i=0; i<tdt.getCompletionLength(); i++)
        al.add("\t"+n32[i].name);
    }
    else
    {
      if (!isOffline) al.add("WRITE access open to : ALL network addresses");
    }
    al.add("servers running on same host :");    
    ServerQuery[] sqhst = TQuery.getDeviceServersEx(context, ip,"ALL");
    for (ServerQuery sq : sqhst) al.add("\t"+sq.getName());


    String[] alst = ENSTools.getServerAliasList(tgt);
    if (alst != null && alst.length > 0)
    {
      al.add("aliases for "+tgt+":");    
      for (String s : alst) al.add("\t"+s+ " -> "+tgt);
    }
    if (!isOffline)
    {
      String[] devs = TQuery.getDeviceNames(context, server);
      if (devs != null)
      {
        al.add(tgt+" has "+devs.length+" devices");
        if (TQuery.devices_have_query_function)
        {
          al.add(tgt+" has property query precedence (classic property server model)");
          tgtdev = "#0";
        }
        if (devs.length > 0 && tgtdev == null) tgtdev = devs[0];
        //for (String s: devs) al.add(s);
      }
    
      String[] prps = TQuery.getDeviceProperties(context, server, tgtdev);
      if (prps != null)
      {
        al.add(tgt+" has "+prps.length+" properties");
        if (TQuery.properties_have_query_function)
        {
          al.add(tgt+" has device query precedence (classic device server model)");
        }
        if (devs.length > 0 && tgtdev == null) tgtdev = devs[0];
        //for (String s: prps) al.add(s);
      }
      TPropertyQuery pztpq[] = null;
      long t0;
      String rdr = null, lclhststr = null;
      int callsOK = 0;
      int callsErr = 0;
      int callsNA = 0;
      int len = prps.length;
      if (limit > 0 && limit < len) len = limit;
      for (int i=0; prps != null && i<len; i++)
      {
        pztpq = TQuery.getPropertyInformation(context, server, tgtdev, prps[i]);
        if (pztpq == null) 
        {
          callsErr++;
          continue;
        }
        for (TPropertyQuery p: pztpq)
        {
          if (TAccess.isRead(p.prpAccess))
          {
            al.add("read "+p.prpName+" : "+p.prpDescription);
            lclhststr = p.prpHistoryDepthShort == 0 ? "none" :
                        p.prpHistoryDepthShort < 0 ? "redirected" :
                        p.prpHistoryDepthLong > 0 ? ""+p.prpHistoryDepthLong+" month(s)" :
                        ""+p.prpHistoryDepthShort+" entries in ring buffer";
            al.add("\tlocal history : "+lclhststr);
            al.add("\tarray type : "+TArrayType.toString(p.prpArrayType));
            if (p.prpRedirection.length() > 0) 
              al.add("\tis redirected to "+p.prpRedirection);
            if (p.prpSizeIn > 0) al.add("\ttakes input: "+p.prpSizeIn+" "+TFormat.toString(p.prpFormatIn)+" elements");
            al.add("\tresults:");
            if (p.prpFormat == TFormat.CF_STRUCT)
            {
              int ssiz = 0;
              if ((ssiz=TStructRegistry.getSizeInBytes(p.prpTag)) <= 0)
              {
                TQuery.AcquireAndRegisterStructInfo(context, server, p.prpTag);
                ssiz = TStructRegistry.getSizeInBytes(p.prpTag,context,server);
              }
              if (ssiz > 0) tdt = new TDataType(new byte[ssiz],p.prpTag);
              else 
              { 
                al.add("\tunable to acquire and register structure tag "+p.prpTag);
                tdt = new TDataType(p.prpSize,p.prpFormat);
              }
            }
            else if (p.prpFormat == TFormat.CF_AIMAGE || p.prpFormat == TFormat.CF_ASPECTRUM)
            {
              al.add("\t"+lnk.getFullDeviceNameAndProperty()+" adjustable format not accessed");
              callsNA++;   
              continue;
            }
            else
            {
              tdt = new TDataType(p.prpSize,p.prpFormat);
            }
            lnk = new TLink(tgt+"/"+tgtdev,p.prpName,tdt,null,TAccess.CA_READ);
            t0 = System.currentTimeMillis();
            rc = lnk.executeAndClose();
            if (rc == TErrorList.illegal_read_write && p.prpSizeIn > 0)
            {
              al.add("\t"+lnk.getFullDeviceNameAndProperty()+" not accessed: requires input data");
              callsNA++;
            }
            else
            {
              al.add("\t"+lnk.getFullDeviceNameAndProperty()+" "+p.prpSize+" "+
                TFormat.toString(p.prpFormat)+" value(s) in "+
                (System.currentTimeMillis()-t0)+" ms : "+lnk.getLastError());
              TDataType dout = lnk.getOutputDataObject();
              switch (dout.dFormat)
              {
                case TFormat.CF_STRUCT:
                  al.add("\tStructure type "+dout.getTag());
                  break;
                case TFormat.CF_BITFIELD8:
                case TFormat.CF_BITFIELD16:
                case TFormat.CF_BITFIELD32:
                case TFormat.CF_BITFIELD64:
                  al.add("\tBitfield type "+dout.getTag());
                  break;
                case TFormat.CF_IMAGE:
                  IMAGE img = (IMAGE)dout.getDataObject();
                  al.add("\tImage; Frame size "+img.getFrameHeader().appendedFrameSize+" bytes");
                  break;
                default:
                  if (dout.dCompletionLength <= 10)
                  {
                    dout.setArrayDelimiter(" ");
                    al.add("\tvalues: "+dout.toString());                  
                  }
                  else
                  {
                    al.add("\treceived "+dout.dCompletionLength+" values");
                  }
                  break;
              }
              if (TErrorList.hasData(rc)) callsOK++; else callsErr++;
            }
            if ((rdr=lnk.getRedirectionKey()) != null && rdr.length() > 0)
            {
              al.add("\t"+"redirected to "+rdr);
            }
          }
          else

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     */
    @Override
    public <T> Map.Entry<T, Timestamp> readAttribute(final String attrName) throws ClientException {
        Future<TLink> futureLink = getFutureLink(attrName);
        try {
            TLink tLink = futureLink.get();
            int rc = tLink.execute();
            if (rc != TErrorList.success) {
                throw new RuntimeException("TLink has failed: " + TErrorList.getErrorString(rc));
            }
            TDataType dout = tLink.dOutput;
            long time = tLink.getLastTimeStamp();
            Timestamp timestamp = new Timestamp(time);
            return new AbstractMap.SimpleImmutableEntry<T, wpn.hdri.ss.data.Timestamp>((T) getDataObject(dout), timestamp);
        } catch (Exception e) {
            throw new ClientException("Read from " + getDeviceName() + "/" + attrName + " failed.", e);
        }

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                                    TPropertyQuery meta = getTPropertyQuery(attrName);
                                    int size = getTPropertySize(meta);
                                    short dataFormat = getTPropertyFormat(meta);
                                    TDataType dout = new TDataType(size, dataFormat);
                                    // get a reference array : synchronous call ...
                                    TLink result = new TLink(getDeviceName(), attrName, dout, null, TAccess.CA_READ);
                                    return result;
                                }
                            });

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    @Override
    public void subscribeEvent(final String attrName, final EventCallback cbk) throws ClientException {
        Future<TLink> futureLink = getFutureLink(attrName);
        try {
            final TLink link = futureLink.get();
            final TDataType dout = link.dOutput;
            long time = link.getLastTimeStamp();
            //read data for the first time
            cbk.onEvent(new EventData<Object>(getDataObject(dout), time));
            //attach event listener
            int rc = link.attach(TMode.CM_DATACHANGE, new TCallback() {
                @Override
                public void callback(int LinkIndex, int LinkStatus) {
                    if (TErrorList.isLinkSuccess(LinkStatus)) {
                        long time = link.getLastTimeStamp();
                        cbk.onEvent(new EventData<Object>(getDataObject(dout), time));
                    } else {
                        cbk.onError(new Exception(TErrorList.getErrorString(LinkStatus)));
                    }
                }
            });
            if (rc < 0) {
                throw new IllegalStateException(link.getLastError());
            }
        } catch (Exception e) {
            throw new ClientException("Failed subscribe to " + getDeviceName() + "/" + attrName, e);
        }
    }

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    @Override
    public void unsubscribeEvent(String attrName) throws ClientException {
        Future<TLink> futureLink = tlinks.remove(attrName);
        try {
            final TLink link = futureLink.get();
            int rc = link.close();
            if (rc < 0) {
                throw new ClientException(link.getLastError(), null);
            }
        } catch (Exception e) {
            throw new ClientException("Failed subscribe to " + getDeviceName() + "/" + attrName, e);
        }
    }

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      if (!isArchiveQueryProperty(property))
        pname = pname + ".HIST"; // meta extension not given, try this ...
    }
    try
    {
      TLink tl = new TLink(dname,pname,dout,din,TAccess.CA_READ);
      cc = tl.execute(timeout, true);
      tl.close();
    }
    catch (UnresolvedAddressException e)
    {
      cc = TErrorList.address_unresolved;
    }

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    {
      if (isCentralArchiveServer(server) || isCentralArchiver(server))
      { // call to a central archive server
        String[] keysrcs = new String[100]; 
        dout = new TDataType(keysrcs);
        TLink tl = new TLink(dname,"KEYWORD.SOURCE",dout,null,TAccess.CA_READ);
        cc = tl.executeAndClose(timeout);
        if (cc == 0) 
        {
          int len =dout.getCompletionLength();
          if (len < 100) keysrcs = Arrays.copyOf(keysrcs, len);
          src = keysrcs;

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      { // call to a central archive server
      FLTFLT[] dtols = new FLTFLT[1];
        dtols[0] = tols;
        din = new TDataType(startstop);
        dout = new TDataType(dtols);
        TLink tl = new TLink(dname,"KEYWORD.TOLERANCE",dout,din,TAccess.CA_READ);
        cc = tl.executeAndClose(timeout);
      }
      else
      {
        THistoryRecordStruct[] hrs = new THistoryRecordStruct[1];
        hrs[0] = new THistoryRecordStruct();
        din = new TDataType(property);
        dout = new TDataType(hrs);
        TLink tl = new TLink(dname,"HISTORIES",dout,din,TAccess.CA_READ);
        cc = tl.executeAndClose(timeout);
        if (cc == 0)
        {
          tols.f1val = hrs[0].getAbsoluteTolerance();
          tols.f2val = hrs[0].getPercentTolerance();
        }

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de.desy.tine.addrUtils.TSrvEntry

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de.desy.tine.bitfieldUtils.TBitfield

de.desy.tine.client.TLinkFactory.RelinkedItem

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de.desy.tine.headers.TGlobalsHdr

de.desy.tine.histUtils.TArchiver

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