npm

NPM client package for LightLink.io

Exports default function

lightlink( [ string ] url, [ Object, optional ] params,   [ Object, optional ] options )

Calls lightlink.io service allowing progressive loading (intermediate callbacks on partial data loaded)

Parameters:

• url - The URL to call
• params - an object containing request parameters
• options - callbacks and progressive loading options

Valid options are :

• partial callback on partial response. Parameters: (data, isPartial /*=true * /, xmlhttp)
• success callback on successful response. Parameters: (data, isPartial /*=false * /, xmlhttp)
• successOrPartial callback on successful or partial response. Parameters: (data, isPartial, xmlhttp)
• error callback on HTTP error ou incorrect JSON response. Parameters: (data, isPartial, xmlhttp)
• exception callback on caught server side exception: Parameters: (data, xmlhttp)
• partialSlices The size of partial response slices. Default to :[100,100,100,100,100,500] meaning 5 times each 100 rows, then each 500 rows until loading ended. Slices should not be too small to avoid too frequent updates that might be not needed. Lower CPU usage
• partialMinInterval The minimum interval between partial responses. Default to 200 millis. Allows to reduce client CPU by avoiding too frequent updates, and less frequent xmlhttp.responseText access

Example

import lightlink from "lightlink";

...
lightlink("/lightlink/my/service",{firstName:"John", lastName:"Smith"},{
    successOrPartial:function(data, isPartial, xmlhttp){...},
    error:function(xmlhttp){
        if (xmlhttp.status!=200)
           console.log("HTTP Error : "+xmlhttp.status)
        else
           console.log("HTTP Error : "+xmlhttp.status)
    },
    exception:function(data, xmlhttp){
       console.log(
        data.error,     // exception.toString() from the server side
        data.stackTrace // will be available in debug mode only
       )
    }
})

That was a verbose (full) syntax. In real application you will probably wrap lightlink function for default error handling, if any.

Something like this:

import lightlink from "lightlink";
...
function myLightLink(url,params,successOrPartial){
    lightlink(url,params,{
        error:function(xmlhttp){
            if (xmlhttp.status!=200)
               console.log("HTTP Error : "+xmlhttp.status)
            else
               console.log("HTTP Error : "+xmlhttp.status)
        },
        exception:function(data, xmlhttp){
           console.log(
            data.error,     // exception.toString() from the server side
            data.stackTrace // will be available in debug mode only
           )
        },
        successOrPartial:successOrPartial
    });
}

...
myLightLink("/lightlink/my/service1",params1,
    (data, isPartial)=>{...}
);

myLightLink("/lightlink/my/service2",params2,
    (data, isPartial)=>{...}
);