I have a java application that has information that I need to display on a webpage, sorta like a chat room, The way I'm currently doing it is by having the java application listen for connections on a specific port and then I have a PHP script that connects every second to update the information listed on the page, What I'm trying to find out is there a better way of doing this? I haven't done anything like this before so sorry If this method is really stupid, I'm just looking for the best way to accomplish this. All constructive comments are welcome.
EDIT:
I forgot to mention that I'm doing this over TCP and I do not have access to MySQL so I can't store anything In a database then have the PHP script go and retrieve it..
Well it depends strongly on the flow, when should the communicate? If PHP needs data from Java then just do a call and parse the data back in xml's. Else if it is a lot like a chat, there should be a way to socket it, although I have never tried it.
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A friend and I decided to code a discord bot in Java, using JDA. The idea is for the bot to give you a request Minecraft recipe (a picture of it). However, we don't want to have to download every single recipe (there are way too many of them). So I was wondering if there's something we can use that would give us the recipes with pictures and everything, like an API or a website that we can access from the Java code that would return something we can use. (No code attached since we haven't really done anything and it would serve no purpose).
I am not sure if an API exists that can do that for you. If the problem is spending the time to download every single recipe I might recommend creating a webscraper that could get that data from you. Getting the images from a site like https://www.minecraftcrafting.info/ would be fairly straight forward using python and beautifulsoup (https://pypi.org/project/beautifulsoup4/). Hope that helps and good luck!
I consider myself an accomplished programmer, but I'm relatively new to Android App development. I'm creating an application that will store information into the SQLite database used in Android. What I'd like to be able to do is be able to take a query of that data and export it either as a file of some sort or just send it to another iteration of the same application on a different phone. Then be able to have that phone import the same information into its own database, seeing that the information should line up correctly as long as it keeps it.
Can anyone provide some good starting examples of how I would best go about this and/or tutorials on how to go about doing it? Right now I'm just not sure how to get started and I could use some help to push me in the right direction, so I'd really appreciate the help.
Thank you ahead of time to anyone who replies.
and export it either as a file
depends on what kind of data you have. You can write any kind of text-based data using a RandomAccessFile for example.
send it to another iteration of the same application on a different
phone
You will need to have your own backend to do so. You could identify the target device by using GCM
In mysql is there a way i can get notified about that a table has been updated with this much amount of rows ?
well i need to perform a task to update xml/json feed automatically whyen there is an update in the database .
i searched for few things like calling triggers ,calling a java method from mysql also get notification in python i have checked on SO but i was looking for an approach where less java work will be required to do .doing it from a servlet was an idea for me but doing it from mysql will be good..
any ideas guys ???
a random though, maybe you could do it in your server instead? It seems like you want a simple way rather than a efficent way. I'd recommend trying something like cronjob in linux. Simply make a script in your DB server that query for changes every once and a while, and send some sort of notification(mail?) out when changes detected? I have no idea how complex your script needs to be in order to detect the changes you want, so this might not be the best idea
edit: so basically you want to edit external files with triggers, then maybe UDF is the thing you need.
take a look at this blog and see if that's what you want.
I have a java program that runs on a couple different computers and I want to be able to be able to access them remotely. I don't need to do anything crazy, just some very basic input output (get and set type stuff). I could write a client type application and set each program to a server with RMI and do it that way but I will not always be on the same computer and do not want to have to carry the .java file around with me.
I'd prefer to write a simple php webpage that I can access from anywhere and have some very basic buttons that could send the commands to the different Applications and receive back some output.
Problems is that it would probably impossible to get my host to load anything other then php onto the server where I'd host my webpage.
Does anyone have any ideas? I've tried googling it and found a couple things out there that sort of sound like what I need but the more I look into them they seem to not be what I wanted after all.
If you really want to do this right I'd suggest looking at a Java web framework (I use Play! myself) to create a RESTful web service and then sending requests from your PHP code that will fetch JSON data.
A framework like Play will make it very easy to get a REST web service running. Just create some wrappers that invoke your existing java code and call renderJSON to output the result.
From the PHP code you'll issue the request using curl and then read the response using json_decode which will turn it into a handy php variable.
This also has the advantage that either end can be changed without the other noticing, as long as the json data format is kept the same.
Based on the way you described your setup you'll probably run into routing issues trying to reach your Java apps from your PHP host. I'd recommend you try something else: have your Java apps frequently check with your PHP app if there are any updates. You can simply use a Java URL connection and a timer:
http://download.oracle.com/javase/6/docs/api/java/util/Timer.html
http://download.oracle.com/javase/6/docs/api/java/net/URL.html
I have a Java program that I'm trying to interact with over the web.
I need to gather form data from the user on a Drupal site that I don't have any control over, send it to the Java program, and send the output back to the user. The Java program needs to load a lot of libraries every time it's run, so it needs to be up waiting for data from the user.
It'd be best for me to just have an HTML form for the input. What's the simplest way to deal with HTML form data using Java?
Also, I'm trying to call the Java program from a shell script. I want the program running in the background though so the libraries are loaded in advance. So ideally, I could use the server I set up for both applications.
Thanks for any help.
It sounds like you really just want to write a servlet (or use a higher level web framework, but a servlet would work fine). That makes it very easy to get web form data - you just ask for values by name, basically.
You could then "script" the application using curl, wget or something similar to make requests to the servlet.
Apologies if this doesn't answer your question - I'm finding it slightly tricky to understand exactly what you're trying to do, particularly as there are multiple layers of web UI involved, as far as I can see.
The easiest way to make POST requests with java is to use the Apache HttpClient or the more recent HttpComponents libraries.