Hi, all i need to integrate gwt with lightstreamer. I have some
problems connected with how to call js in gwt. I have been using
native methods before but this time something is going wrong and i
can't understand what.
So here is every thing explained in brief:
Lightstreamer has 2 .js lib files. I include them in my host page and
they are loaded successfully.
I wrote native method that calls some js code that subscribes for ls
feeder:
private static native void init(ListGrid grid, ListGridRecord record,
int recordIndex) /*-{
try {
var page = new PushPage();
page.context.setDomain("localhost");
page.onEngineCreation = function(engine) {
engine.connection.setLSHost("localhost");
engine.connection.setLSPort(8888);
engine.connection.setAdapterName("HELLOWORLD");
engine.changeStatus("STREAMING");
}
page.bind();
page.createEngine("HelloWorldApp", "LS/",
"SHARE_SESSION");
var schema = new Array("message","timestamp");
var group = new Array("greetings");
var nvt = new NonVisualTable(group,schema,"MERGE");
nvt.setSnapshotRequired(true);
var c = 1;
nvt.onItemUpdate = function(item, itemUpdate, itemName)
{
if (itemUpdate.isValueChanged("message")) {
var msg = itemUpdate.getNewValue("message");
var ts = itemUpdate.getNewValue("timestamp");
if (c == 1) {
alert(msg + " " + ts);
c+= 1;
}
record.setAttribute("message", msg);
record.setAttribute("timestamp", ts);
grid.refreshRow(recordIndex);
}
}
page.addTable(nvt,"hellotable");
} catch(error) {
alert(error);
}
}-*/;'
The same code executed in html page is working, but if i call it from
onModuleLoad()
the alert(error) shows me an error: PushPage is not defined and
PushPage is defined in the external lightstreamer js lib files, which
i included in my host page.
Here is working code in html page:
<html>
<head>
<script src="LS/lscommons.js" type="text/javascript"></script>
<script src="LS/lspushpage.js" type="text/javascript"></script>
</head>
<body>
<div source="lightstreamer" table="hellotable" item="greetings"
field="message">loading...</div>
<div source="lightstreamer" table="hellotable" item="greetings"
field="timestamp">loading...</div>
<div id="container">
Updates:<br/>
</div>
<script>
var page = new PushPage();
page.context.setDomain("localhost");
page.onEngineCreation = function(engine) {
engine.connection.setLSHost("localhost");
engine.connection.setLSPort(8888);
engine.connection.setAdapterName("HELLOWORLD");
engine.changeStatus("STREAMING");
}
page.bind();
page.createEngine("HelloWorldApp", "LS/",
"SHARE_SESSION");
var schema = new Array("message","timestamp");
var group = new Array("greetings");
var nvt = new NonVisualTable(group,schema,"MERGE");
nvt.setSnapshotRequired(true);
nvt.onItemUpdate = function(item, itemUpdate, itemName) {
var updateText = "updating item " + itemName + ". ";
if (itemUpdate.isValueChanged("message")) {
updateText += "New value for last_price: " +
itemUpdate.getNewValue
("message");
}
document.getElementById("container").innerHTML += updateText +
"<br/
>";
}
page.addTable(nvt,"hellotable");
</script>
</body>
</html>
In the gwt application i want to update some grid row and in the html
application i update some div as you can see.
So the main problem is why PushPage is not defined?
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