AutoUpdate

Automatically downloading it and checking upon startup?

 

then just check if there is a new version out?

 

you make it send a message to console, which you should know how to.

 

You need to communicate with something external. For example, create a json document online for example using pastebin as so. You would have to edit this document as the versions progress. You can open this paste in raw text by using the /raw/ tag. Now that we have raw json data (not all the HTML and stuff), we could retrieve it and use the native JSON library for example to parse and use it as so:

Hastebin or pastebin or raw code below:

Code (Text):

import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

/**
* Project created by ExpDev
*/

public class PastebinJson {

    /**
     * Runs when the program starts
     */
    public static void main(String[] strings) {
        // The endpoint which we will get the data from
        String requestUrl = "https://pastebin.com/raw/JVPCnziR";

        // Our string builder which we will append our results to later
        StringBuilder sb = new StringBuilder();
        try {
            // Using the String and turning into an URL object
            URL url = new URL(requestUrl);
            // Opening a connection with our URL
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            // The connection should be able to handle outputs
            connection.setDoOutput(true);
            // Using a simple GET
            connection.setRequestMethod("GET");
            // We want JSON back
            connection.setRequestProperty("Accept", "application/json");
            connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");

            // reading our response
            BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            while ((line = br.readLine()) != null) {
                sb.append(line);
            }
            // Closing the reader
            br.close();
            // Disconnecting the connection is also important
            connection.disconnect();
        } catch (Exception e) {
            throw new RuntimeException(e.getMessage());
        }
        String response = sb.toString();
        System.out.println(response);

        JSONObject jsonObject = new JSONObject(response);

        double currentVer = 2.0;
        String name = jsonObject.getString("name");
        double latestVer = jsonObject.getDouble("latestVersion");

        System.out.println("Newest version of " + name + " is: " + (latestVer));
        System.out.println("Have to update?: " + (latestVer > currentVer));
    }

}

Output:

Code (Text):

{name:"MyPlugin",latestVersion:2.1}
Newest version of MyPlugin is: 2.1
Have to update?: true

As you can see, it's very easy. Now, you could just not use json, and instead just have the page return one number like this. However, it could get tricky when you want to store more information. And json is much more organized and quicker for the computer to read.

-------------
EDIT: Do this on onEnable or something and send a message to the console that they need to update. You could also probably keep a link to the newest version in the pastebin as well.

EDIT2: Disclaimer: downloading external files is not allowed on SpigotMC as stated in the rules. So please only leave a notification, and do not take use of Java to install the newest version on the machine that contains your plugin.

EDIT3: I just tested how long the operation takes:

Code (Text):

Operation took 291738699 nanoseconds (291 milliseconds)

This is a considerable amount of time, so I would suggest performing the operation once, and caching the results for about an hour before you do it again if you wanna constantly send the update notification. So if within an hour you have edited the json document, they will know once the cache outdates itself and new results are cached.

EDIT4: Remember to create a Pastebin account to be able to edit your pastebins.
-------------

Hope I helped!

 

There is a handy guide here for doing this, using inventivetalent's SpiGet website: https://www.spigotmc.org/threads/tut-update-checker-using-spiget.186294/

 

Sounds like response isn't a String?

Did not know of this. Defiantly use this instead.

 

That's just an example of how he parsed it. You can do it however you'd like, if you do not wish to use his code. As long as you retrieve the data, you can parse it how u want.

 

You seem to have 28 resources on here, so test it yourself.

 

No. I put it in myself for the version, but get nothing but an empty array back. Think that one is broken, as the others work just fine. But that update thing doesn't work. Might want to resolve back to the Pasebin temporarily if urgent, then contact him and ask what is wrong.

EDIT:
For example: https://api.spiget.org/v2/resources/22027/versions?size=2147483647 returns nothing but an empty array ([]), however https://api.spiget.org/v2/resources/22027/updates?size=2147483647 returns correct information.

 

Ok

 

You can to use an text file and the plugin to read theat or to put the plugin to read on mysql the version and to cheak in is the new version.

 

None of this is optimal.

• Prefer third-party services that do this for you and use their own code and hosting. There's plenty of auto-update systems out there with configurable options to do whatever you'd like.
• No need to store a text file with the version. Bukkit stores that internally so you can retrieve it from there.
• Please don't roll your own PHP/MySQL backend. It's a security and logistic nightmare.