We are storing our data in an internal key-value store in few different data formats, To view or update data in the store I have built a command line tool which accepts a commands in a custom query language (similar to Object Query Language) parses, interprets and displays it on the console.
I am thinking of building a web based GUI for this. Since I have limited experience with this, wanted to know what would be the easiest way to do it (in java).
Currently the UI just needs to have two elements a text area for accepting commands and a table for displaying the output. The output table should be simple enough to implement but I am stuck on the input element part, since the console application provides history of the commands by default but I am not sure what GUI element would be good for this. An alternative would be to have a big text box in which the user can type multiple commands and run any of them by simply highlighting and executing it like most standard gui sql clients do (
http://mywebsql.net/screenshots/?cat=Sql+Editors#/images/screens/02.Sql%20Editors/Multiple%20Editors.png)
I went through the Google Web Tool kit widget gallery ( https://developers.google.com/web-toolkit/doc/latest/RefWidgetGallery ) but none of them seem to fit my need.
Any suggestions on this would be very helpful.
Thanks
I don't think you'll find any component providing a history of previously executed commands for you. But nobody forbids you to implement your own solution.
Just provide a text field or text area to type a command, and display a list of previous commands next to the text field/area. When a previous command is clicked, replace the text of the text area by the text of the clicked command. And when a command is executed, add it to the history list.
Any web framework, from basic servlet/JSP to component-based framewoks, should allow you doing that.
Related
I'm currently working on a client-server project where the client sends a request to the server and the server runs a database statement based on the information from the client. As there's no static length for the output I add all the data to a ArrayList<String> and send it back to the client.
The data that the client requests has a certain hierarchy so that one could also display it using an XML file (however the output to a GUI is wanted here instead of file creation). There's several ways of displaying I came up with. One would be using a simple text area, however using this, I need to do applying the layout myself and the option of folding where I can expand and collapse certain items is not possible.
Another possibility of course would be using a simple JList, however I read on Stackoverflow that using a JList to display hierarchical things is way easier done using a JTree.
When I decided trying to implement JTree I also found the Genealogy.java file provided by Oracle in their documentation of JTree. As to be seen in the first examples of this documentation there is always a filestructure being displayed and hence also a filestructure kind of representation (using folder- and file-symbols) is shown. In contrast to this Genealogy.java only shows the names of the persons so I tried to adapt the implementation from Genealogy.java to my case however I'm completely clueless of how to do this as I don't even know where these symbols come from and where I could possibly disable them and also don't really get what some of the methods I need to implement do.
As I'm currently really clueless of how to possibly accomplish that I really need some detailed help (only telling me to come up with my own implementation of JTree or TreeNode doesn't really help me at this point). Is there any simpler way or is the need to implement any of the before mentioned interfaces inevitable and if so, how would it be done?
EDIT:
This is how it currently would be displayed (example taken from the Oracle documentation, showing folder- and file-symbols in front of the string):
And this is how I want it to be displayed (also from the documentation, this time only displaying a string as node):
The answer almost certainly will be found via the (icon of the) TreeCellRenderer used for the tree nodes. See the File Browser GUI for tips. It shows how to set the icons in the FileTreeCellRenderer. Admittedly the point here is almost exactly opposite what it was there, but it still comes down to the same thing - the icons.
The section of the tutorial that covers it is How to Use Trees: Customizing a Tree's Display.
I am using Java to write a console program that retrieving stock ticks from a data source and printing to the console in table format.
However I don't know how to update the value in the table. Once I got a new price for the stock, I want to refresh the value in the console. I don't want to clear my console and print the entire table with a single value update everytime, it looks pretty stupid. Any suggestions are welcome.
The console is OS specific, while native programs can perform coordinate based updates within a console Window, this isn't something inherently supported by Java which treats the console as input and output streams.
Theoretically you could write a program to perform such updates and have Java talk to it via JNI, though this would, in my opinion, be overkill. You'd be far better spending your time writing a Swing or Web based application in which this type of behaviour is far more easily achieved.
I have written a Java program, which reads numbers from different files. The numbers are added while being read from the files and the sum is displayed in a browser. The browser keeps on displaying the new sum getting created at every step.
I know how to display static values in a browser. I can use Javascripts. But I don't know what mechanism to use to display continuously a changing value.
Any help is appreciated!
You'll have to request the data to display from the server. You can use a data-binding library like Knockout to automatically update the page as the underlying model changes, or you can just use a library like jquery to modify the DOM on your own.
Alternatively, you could keep a pipe open to the server using the Comet model: http://en.wikipedia.org/wiki/Comet_%28programming%29. However, it can be expensive to eat up a thread for long periods of time on your web server.
Good luck.
Check out knockout.js http://www.knockoutjs.com/ it is a framework for updating UI automatically when data changes
I am working on a project here that ingests internal resumes from people at my company, strips out the skills and relevant content from them and stores it in a database. This was all done using docx4j and Grails. This required the resumes to first be submitted via a template that formatted everything just right so that the ingest tool knew what to look for to strip the data.
The 2nd portion of this, is what if we want to get out a "reduced" resume from the database. In other words, I want to search the uploaded content I now have, and only print out new resumes for people who have Java programming experience lets say. So I can go into my database, find the people who originally had java as a skill, and output a new set of resumes that are also still in a nice templated format, and only have the relevant info in them, instead of ALL the content.
I have been writing some software to do this in Java that will basically use a docx template, overwriting the items in customXML which are bound to the content controls in the doc, so the new data shows up and can eb saved as a new docx with that custom data.
This seems really cumbersome to me, and has some limitations. For one, lets say my template has a place for 3 Skills, and the particular person has 8 skills. There seems to be no good way to add those 5 additional skills to the docx other than painstakingly inserting the data with all of the formatting XML tags and such. This is a real pain, because if the template changes, I dont want to have to go back into my software and edit source code to change that additional data input XML tag to bold instead of italic.
I was doing some reading up on using Infopath to create a form that I could use to get the input, connecting to some sharepoint data source or something to store the stripped out data. However, I can't seem to find out if it is possible using sharepoint to get the data back out, in a nice formatted way. What would the general steps for this be? It seems like I couldnt find very much about this topic with any quick googling.
Thanks
You could set up the skills:
<skills>
<skill>..</skill>
<skill>..</skill>
and use a "repeat" content control pointing to the container. This would handle any number of <skill> entries.
I'm wandering myself what component is the best for displaying fast search results in swing. I want to create something like this, make a text field where user can enter some text, during his entering I'll improve in back end fast search on database, and I want to show data bellow the text box, and he will be able to browse the results and on pres enter result will be displayed in table. So my question is is there any component which already have this logic for displaying?
Or is it's not, what is the best way to implement that.
This search will be something what ajax gives me on web, same logic same look and feel, if it's possible on desktop application.
Are you looking for something like an AutoComplete component for Java Swing?
SwingX has such a component. See here for the JavaDoc. It has a lot of utility methods to do various things, i.e. auto-completing a text box from the contents of a JList.
I strongly, strongly recommend that you take a look at Glazed Lists - this is one of the finer open source Java libraries out there, and it makes the bulk of what you are asking about super easy.
You will have to first attach a listener to the JTextFields Document to be notified whenever the user types in the field (or changes it).
From there, you can fire off any server-side code you need. The results of that can be used to update a listbox.
A few things to keep in mind:
The code to do the search against the backend must be in another thread
The code that updates the list box should update the list box's model
You will need to manage all your backend search results so that you only update the listbox with the most recent result (e.g. user types 'A', backenf searches for that. Meanwhile, user has typed 'C', kicking off a backend search for 'AC'. You need to ensure the results from the 'A' search dont' make it to the listbox if the 'AC' search results are available).
Use Hibernate Search.
The SwingHack (http://oreilly.com/catalog/9780596009076/) book has an example of this.
In the interest of killing two birds with one stone: have a separate indexing thread. This will:
Improve the speed of searches whenever they are executed.
Improve the responsiveness of the UI since indexing is happening in a separate thread.
Of course, exactly how you perform the indexing will vary widely depending on your particular application. Here is a good place to start researching: Search Indexing. And please, ignore the reference to Web 3.0 [sic].
It is possible of course. It is simple too. For drop down list of terms just use popup menu. This is simple. The background processing of entered text is simple too. Enjoy!