On Sep 25, 9:51 am, Pete <[EMAIL PROTECTED]> wrote:
> It seems like it should be possible to do something like this (see
> below) to integrate the new ga.jsanalyticsapi. However, when i did
> it, all i got was trouble - very strange exceptions like
>
> java.lang.RuntimeException: Could not find a native method with the
> signature '[EMAIL PROTECTED]::setInnerHTML(Ljava/lang/
> String;)'
> at
> com.google.gwt.dev.shell.ie.ModuleSpaceIE6.doInvokeOnWindow(ModuleSpaceIE6.java:
> 57)
>
> or
>
> 203.1/com.google.gwt.user/com/google/gwt/core/client/GWT.java(216):
> Failed to create JSNI method with signature
> '[EMAIL PROTECTED]::getVersion0()'
>
> Can anyone shed light on why this is happening?
>
> The error arose directly after calling new GoogleAnalytics(id) in my
> onModuleLoad() method. Note, the constructor for the GoogleAnalytics
> object appears to succeed - but GWT is not happy after that call.
I have only investigated a bit, but the problem appears to be the GA
code and the compiled GWT code stepping on each other. The solution I
used was to just put the GA script tag in the host html (ignoring the
business with http/https since I know the page will be only be
accessed via http) -- if you are using the standard linker, the GWT
code is isolated into an iframe -- and then reference it with the
attached class. This is what I use for my own personal app and hasn't
been tested outside my environment, is unsupported, etc etc. However,
if you do run into problems with it let me know and I will see what I
can do.
I use trackPageview(String) to set fake URLs based on the history
token, which I use to navigate the app. That way I can track the GWT
app exactly the same as if it were static HTML.
public class Analytics {
/**
* Create a new tracker object.
*
* @param key Google Analytics key
*/
public static native void getTracker(String key) /*-{
try {
// handle GA included at the top level or embedded
$wnd._pageTracker = (_gat || $wnd._gat)._getTracker(key);
} catch (e) {
// TODO(jat): anything better to do here than fake the tracker?
}
if (!$wnd._pageTracker) {
// alert("creating fake tracker");
// create fake object
$wnd._pageTracker = {
_initData: function() {},
_trackPageview: function() {},
_setVar: function() {},
_addTrans: function() {},
_addItem: function() {},
_trackTrans: function() {},
};
}
$wnd._pageTracker._initData();
}-*/;
/**
* Track a pageview based on the current URL
*/
public static native void trackPageview() /*-{
try {
$wnd._pageTracker._trackPageview();
} catch (e) {
}
}-*/;
/**
* Track a pageview for a given event.
*
* @param event the name of the event to record, which must start
with a slash
*/
public static native void trackPageview(String event) /*-{
try {
$wnd._pageTracker._trackPageview(event);
} catch (e) {
}
}-*/;
/**
* Set the segmentation variable.
*
* @param segment arbitrary string to identify the customer segment
*/
public static native void setVar(String segment) /*-{
try {
$wnd._pageTracker._setVar(event);
} catch (e) {
}
}-*/;
/**
* Build a transaction to be recorded.
*
* @param orderId
* @param affiliation
* @param total
* @param tax
* @param shipping
* @param city
* @param state
* @param country
*/
public static native void addTrans(String orderId, String
affiliation, String total,
String tax, String shipping, String city, String state, String
country) /*-{
try {
$wnd._pageTracker._addTrans(orderId, affiliation, total,
tax, shipping, city, state, country);
} catch (e) {
}
}-*/;
/**
* Add a line item to an order. addTrans must have previously been
called with the specified
* orderId.
*
* @param orderId
* @param sku
* @param productName
* @param category
* @param price
* @param quantity
*/
public static native void addItem(String orderId, String sku, String
productName,
String category, String price, String quantity) /*-{
try {
$wnd._pageTracker._addItem(orderId, sku, productName,
category, price, quantity);
} catch (e) {
}
}-*/;
/**
* Track a transaction. addTrans and zero or more addItem calls
must have been made previously.
*/
public static native void trackTrans() /*-{
try {
$wnd._pageTracker._trackTrans();
} catch (e) {
}
}-*/;
}
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