Moved from Restler to Needle

I had two web services  one to download file and another one to upload files.
I started coding for uploading a file using restler module. which worked absolutely fine. then when I started coding for downloading file it was corrupting the binary stream file.

I started looking for different options, I had  two options 'request' and 'needle'.

I worked with 'request v2.73.0' module for 2 months. but after updating to v2.75.0. It just stopped working I was not even able to make regular POST request. 

After that, I had to look for another option than I started using Needle module.
which solved my both purpose of uploading and downloading files.  

File Download using Needle

var needle = require('needle');
var dataToSend = {
    data1: "data1",
    data2: "data2"};
needle
    .post('webServiceURL', dataToSend)
    .on('end', function (response) {
        console.log('success log');
        res.download('public/uploads/report.pdf');
    }).on('error', function (response) {     console.log('Error downloading report file');    }).pipe(fs.createWriteStream('public/uploads/report.pdf'));

File Upload using Needle

var needle = require('needle');
var dataToSend = {
    data1: "data1",
    data2: "data2",    
    file2: {file: FILE_PATH,content_type : FILE_TYPE}
};
needle
    .post('webServiceCall', dataToSend, { multipart: true }, function(err, resp, body){
        console.log('error:   '+err);
        console.log('response:   '+resp);
        console.log('body:   '+body);
        res.redirect('/fileUploadPage');
    });

// web service response in Java should be set in following manner

ResponseBuilder response = Response.ok((Object) fileObject);
response.header("Content-Type", MediaType.APPLICATION_OCTET_STREAM);
response.header("Content-Disposition", "attachment;  filename=\"file_name.pdf\"");
return response.build();

Multiple XY-Line in a single Chart in Jasper Reports using JRBeanCollectionDataSource

Today, I had to create a xy-line chart with multiple lines in it. I know, with XY-Linechart with just single line it is pretty much easy to plot it and most of the blog would should that.But, None showed how to plot XY-chart with multiple lines and that too using JRBeanCollectionDataSource.It took me a lot of time to figure out for plotting it.That's the reason I am writing this blog.

Basic XY-Linechart is pretty much easy, where you just pass the datasource and it will be done. But, with just a small trick we can plot multiple xy-lines as well.
I am using JasperStudio 6.3.0

Jasper reports Part.


+> Create a Report

+> Remove all the unwanted Band from the report (except Summary) .

+> Create a Dataset or if you want to use main dataset then also it will work..I will be using main        Dataset.

+> Create a Parameter  'XYChartDataSource'  of type 'net.sf.jasperreports.engine.data.JRBeanCollectionDataSource'.

Create 3 fields as following




+> Now, Drag and drop a chart in SUMMARY  or TITLE band.(when you put chart in any other band, it will print chart multiple times).

+>  Select XY-Line Chart

+>  Set Following parameters









Java Part


Bean:

public class Coordinates {

    private Number series;
    private Number xCoordinate;
    private Number yCoordinate;

// Getters and Setters
}

Main class:

 List<Coordinates> coordinates1 = new ArrayList<>();
 List<Coordinates> coordinates2 = new ArrayList<>();
 List<Coordinates> coordinates3 = new ArrayList<>(); 

Map<String, Object> parameters = new HashMap<String, Object>(); 
//Getters & setters

coordinates1.add(new Coordinates("series 1", x-data ,y-data)); 
coordinates1.add(new Coordinates("series 1", x-data ,y-data)); 
coordinates1.add(new Coordinates("series 1", x-data ,y-data));  
...

coordinates2.add(new Coordinates("series 2", x-data ,y-data));
coordinates2.add(new Coordinates("series 2", x-data ,y-data));
coordinates2.add(new Coordinates("series 2", x-data ,y-data)); 
 ...

coordinates3.add(new Coordinates("series 3", x-data ,y-data)); 
coordinates3.add(new Coordinates("series 3", x-data ,y-data));
coordinates3.add(new Coordinates("series 3", x-data ,y-data));
..

// create separate bean object for each data-series
 JRBeanCollectionDataSource bean1 = new JRBeanCollectionDataSource(coordinates1);
 JRBeanCollectionDataSource bean2 = new JRBeanCollectionDataSource(coordinates2);
 JRBeanCollectionDataSource bean3 = new JRBeanCollectionDataSource(coordinates3);


// All Series Datasource Name should be same for all beans
parameters.put("XYChartDataSource", bean1);
parameters.put("XYChartDataSource", bean2);
parameters.put("XYChartDataSource", bean3);  


// same normal procedure for printing reports