Develop Reference

Integrating 3rd party API with jhipster based webapp

I am trying to build a simple web app using jHipster. Currently I am trying to build a simple stock entity that will enable a user to input the stock name and the entity should generate a listing of that stock with open, high, low and close data. I am unable to figure out how to integrate the web app with a third party API that supplies the data. I could not find any documentation regarding this issue online. Thank you.

I found this tutorial on implementing API's that might help.
What you need to do is create an HTTP client that can access your API.
I'm not too familiar with jHipster but finding the proper library to import seems like a good first step. Good luck.
Source:
https://zapier.com/learn/apis/chapter-8-implementation/
If you aren't sure which language to choose, a great way to narrow down the selection can be to find an API you want to implement and see if the company provides a client library. A library is code that the API owner publishes that already implements the client side of their API. Sometimes the library will be individually available for download or it will be bundled in an SDK (Software Development Kit). Using a library saves you time because instead of reading the API documentation and forming raw HTTP requests, you can simply copy and paste a few lines of code and already have a working client.

imitate browser with java

I'm looking for a java-framework which enables me to easily communicate with a website.
What I'd like to do is for example:
log into a website
open various pages
read information
submit information into forms
send ajax-requests
read ajax-response
What I'm not looking for is a browser automation plugin like selenium. I'm trying to have my application directly communicate with the website.
That's the general outline. If you can think of a better solution for the following problem, I'm more than willing to follow your advice (:
We're working with an webapplication with an gruesome GUI. Unfortunatley we've got no means to tinker with said application or request changes to it. What I'd ike to do is to build is a client which logs into said application, fetches the data and displays them in a more appropriate manner with additional information based on that data while also providing tools to process this data and submit it back to that web-application.
Thanks in advance.

Selenium does come for JAVA. You can download it from here. http://www.seleniumhq.org/download/
Here is a tutorial:
https://www.airpair.com/selenium/posts/selenium-tutorial-with-java
How Selenium web driver works
Selenium web driver (firefox web driver) will open a web browser(firefox) for you and you can actually see what's going on. The choice of opening a browser window may not be the requirement for you. Then you can use:
HTMLUnitWebDriver
PhantomJSDriverService

Take a look at
http://hc.apache.org/httpcomponents-client-ga/quickstart.html
Its not a framework but a library but should provide you the needed methods to interact with your web application

How can I generate reports containing charts with Pentaho and Java?

We have a Java EE based web application and we want to integrate Pentaho reporting API into this application.
So, I'm trying to learn how Pentaho can automatically generate reports containing charts. I have downloaded Pentaho BI server and played with it for a few days. But I'm still clueless about the following issues:
How to generate reports dynamically at runtime without loading those *.prpt files.
Where I can get a simple tutorial about dynamic report generation
What the difference is between Community Dashboard Framework, charting tools and reporting tools.
The documentation on the Community Dashboard Framework site is not properly organized, and there is not a single tutorial about getting started.
If anyone can help me find the answers to some of my questions, it will be great!

You can define reports purely via the API of the reporting engine. Samrat is right on that the preferred way of defining reports is the report designer - as code changes are harder to maintain than changes of a GUI-editable external report definition.
I think the best way to go forward is to grab Will Gorman's book about "Pentaho Reporting 3.5 for Java Developers" which gives you a deep insight into the inner workings of the reporting engine and also how to define reports dynamically.
CDF vs Reporting: CDF is a javascript toolkit for creating interactive dashboards. Dashboards are aimed to provide a high-level overview over the state of your company with the ability to drill down or even customize them. Reports produced by the reporting engine are predefined/"canned" reports that we expect to be run frequently to answer specific business questions. Charts components are just components that produce a given chart for dashboards based on a set of input parameters.
CDF uses reports and charts as content in dashboards.

Without prpt files there is no pentaho reporting. To achieve dynamically, run the pentaho BI server and pass the parameters to the report. Load the report in iframe.

Spring Roo for a rich reporting app

I'm thinking of using Spring Roo for a reporting app. This is a rich reporting app made up of a collection of master-detail forms that will export excel and pdf. This is a read-only app to an existing data warehouse.
My plan is to create a set of entities and then define a set of finders, where each finder represents one of the required reports. No idea how I am going to handle the master-detail display of the file export.
Anyone using roo willing to point out what my options are for master-detail and file export? Also, how good is roo for this type of app?

I have used gvnix addons and they seem to serve the purpose you are looking for. Here is the link for the addons:
https://code.google.com/p/gvnix/wiki/DocPattern

Java Netbeans: Editing the MySQL DB connection infos

I just created a new project with NetBeans using the database template to connect to a MySQL database. After searching a while I got a question and hope anyone can help me with that:
I want to create a dialog in my application to change the connection-informations to the MySQL Server. I realized that the template gets the infos out of the persistence.xml file when it compiles. But I cant find the point in the source code where he reads the xml file and gets the informations. Is there any way to hardcode the IP adress and the Database name and so on in the code?
Thanks for your help!

Don't use the Swing Application Framework.
Newer NetBeans IDEs will display this disclaimer if you create a JavaDesktopApplication project:
Note that JSR-296 (Swing Application Framework) is no longer developed and will not become part of the official Java Development Kit as was originally planned. You can still use the Swing Application Framework library as it is, but no further development is expected.
If you are looking for a Swing-based application framework, consider using the NetBeans Platform [platform.netbeans.org][1], which is a full-featured platform suitable for creating complex and scalable desktop applications. The Platform contains APIs that simplify the handling of windows, actions, files, and many other typical application elements.
As to your question regarding the persistance.xml file, that's read somewhere in the framework (probably in org.jdesktop.application.Application). It's not in any of the files in your project. All you can really do is change the values in the file.