getting field value directly via javascript

pluczak

Hi,

my Java Adapter has a following piece of code:

final Map<String, String> sentimentIndexMap = new HashMap<String, String>();
sentimentIndexMap.put("INDEX", Double.toString(sentimentIndex));
listener.update("SENTIMENT", sentimentIndexMap, false);

Now, when I try to get the SENTIMENT INDEX property in javascript using any of the following lines I get nothing:

var si = updateInfo.getNewValue("INDEX");
var si = updateInfo.getNewValue("SENTIMENT.INDEX");
var si = updateInfo.getNewValue("SENTIMENT");

So, the question is: how do I extract that value? and why does the same works for other parameters ("BID"):

var pushtable = new OverwriteTable(null, null, "MERGE");
pushtable.onItemUpdate = updateItem;
pushtable.onChangingValues = formatValues;
pushtable.setPushedHtmlEnabled(true);
page.addTable(pushtable, "quotestable");
function updateItem(item, updateInfo) {
        if (updateInfo == null) {
                return;
 	}
	if (updateInfo.getNewValue("BID") == null) {
	        return;
	}
	var oldLast = updateInfo.getOldValue("BID");
	if (oldLast == null) {
	        updateInfo.addField("#trend_color",greenColor,true);
	} else if (updateInfo.isValueChanged("BID")) {
	        if (oldLast > updateInfo.getNewValue("BID")) {
	                updateInfo.addField("#trend_color",redColor,true);
	        } else {
	                updateInfo.addField("#trend_color",greenColor,true);
	        }
	}
	if (item != null && item >= 0 && item <= quotesarr.length) {
	        var currentTime = new Date();
	        var hours = currentTime.getHours();
	        var minutes = currentTime.getMinutes();
	        if (minutes < 10){
	                minutes = "0" + minutes;
	        }
	        var timetextfield = document.getElementById(quotesarr[item-1]+'.TIME').innerHTML = hours + ":" + minutes;
	}
	var si = updateInfo.getNewValue("INDEX");
	if (si != null) {
	        var blatextfield = document.getElementById('bla').innerHTML = si;
	} else {
	        var blatextfield = document.getElementById('bla').innerHTML = "bla";
	}
}
function formatValues(item, itemUpdate) {
	if (itemUpdate == null) {
	        return;
	}
	itemUpdate.setHotTime(fadeout);
	var backH = itemUpdate.getServerValue("#trend_color");
	itemUpdate.setAttribute("BID",backH, null,"backgroundColor");
	itemUpdate.setAttribute("ASK",backH, null,"backgroundColor");
}

Dario Crivelli

You should ensure that the "INDEX" field is part of the subscription schema.
This cannot be determined by the provided code snippet, as the

new OverwriteTable(null, null, "MERGE");

form (with no schema specified) implies that the Html Client Library finds the fields by looking for your Html cells in the page.

You can easily check which fields are subscribed to by looking at the Server log.
You can find them embedded in the "/lightstreamer/control" request, logged with the factory log configuration;
alternatively, you can have a more detailed log by setting the "LightstreamerLogger.subscriptions" logger at DEBUG level.