How to use

publishTailPosition

method

in

com.ociweb.pronghorn.pipe.ObjectPipe

private boolean publishMultiResponseDBUpdate(long conId, long seqCode) {
  boolean result =  service.publishHTTPResponse(conId, seqCode, 200,
                    HTTPContentTypeDefaults.JSON,
                    w-> {
                      Templates.multiTemplate.render(w, collectorDBUpdate);
                      int c = collectorDBUpdate.size();
                      while (--c>=0) {
                        assert(collectorDBUpdate.get(c).getConnectionId() == conId);
                        assert(collectorDBUpdate.get(c).getSequenceId() == seqCode);					    						   
                        collectorDBUpdate.get(c).setStatus(-1);
                      }
                      collectorDBUpdate.clear();
                      DBUpdateInFlight.publishTailPosition();
                    });
  collectionPendingDBUpdate = !result;
  return result;
}

private boolean publishMultiDBResponse(long conId, long seqCode) {
  final boolean result =  service.publishHTTPResponse(conId, seqCode, 200,
                    HTTPContentTypeDefaults.JSON,
                    w-> {
                      Templates.multiTemplateDBRest.render(w, collectorDBRest);
                                            int c = collectorDBRest.size();
                      assert(collectorDBRest.get(0).getGroupSize()==c);
                      while (--c >= 0) {
                        assert(collectorDBRest.get(0).getGroupSize()==collectorDBRest.size());
                        assert(collectorDBRest.get(c).getConnectionId() == conId) : c+" expected conId "+conId+" error: "+showCollection(collectorDBRest);
                        assert(collectorDBRest.get(c).getSequenceId() == seqCode) : c+" sequence error: "+showCollection(collectorDBRest);    						   
                        collectorDBRest.get(c).setStatus(-1);
                                             }
                      collectorDBRest.clear();                                               
                      DBRestInFlight.publishTailPosition();
                    });
  collectionPendingDBRest = !result;
  return result;
}

private boolean consumeResultObjectDBRest(final ResultObject t) {
  boolean ok;
          
  ///////////////////////////////
  if (0 == t.getGroupSize()) {	
    ok = service.publishHTTPResponse(t.getConnectionId(), t.getSequenceId(), 200,
        HTTPContentTypeDefaults.JSON,
        w-> {
          Templates.singleTemplateDBRest.render(w, t);
          t.setStatus(-1);
          DBRestInFlight.moveTailForward();//only move forward when it is consumed.
          DBRestInFlight.publishTailPosition();
        });                    
  } else {
    //collect all the objects
    assert(isValidToAdd(t, collectorDBRest));
    collectorDBRest.add(t);                    
    DBRestInFlight.moveTailForward();
    if (collectorDBRest.size() == t.getGroupSize()) {
      //now ready to send, we have all the data						
      ok =publishMultiDBResponse(t.getConnectionId(), t.getSequenceId());
      
    } else {
      ok = true;//added to list
    }    
    //moved forward so we can read next but write logic will still be blocked by state not -1			 
    
  }
  return ok;
}

fortuneInFlight.publishTailPosition();
t.list().clear();
htmlFortuneBuffer.clear();