NullPointerException - installDLL()

Has anyone used the new database system built into Bukkit yet? I'm attempting to. Using Dinnerbone's plugin as an example. Here's the error I'm getting:

Code:

11:36:14 [SEVERE] null loading HeroLock v0.0.1 (Is it up to date?)
java.lang.NullPointerException
        at org.bukkit.plugin.java.JavaPlugin.installDDL(JavaPlugin.java:251)
        at com.herocraftonline.rightlegred.herolock.HeroLock.setupDatabase(HeroL
ock.java:52)
        at com.herocraftonline.rightlegred.herolock.HeroLock.onEnable(HeroLock.j
ava:33)
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:127)
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader
.java:514)
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManage
r.java:216)
        at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:115)
        at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:93)
        at org.bukkit.craftbukkit.CraftServer.reload(CraftServer.java:285)
        at org.bukkit.command.SimpleCommandMap$ReloadCommand.execute(SimpleComma
ndMap.java:196)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:80
)
        at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:2
46)
        at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:391)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:377)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:283)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:375)

and here is what the said error is talking about, in my code:

Code:

    private void setupDatabase() {
        if(getDatabase() == null){
            installDDL();
        }
    }

I tried using Dinnerbones way, but that also threw the same error.

 

This is where the exception is thrown from:

Code:

protected void installDDL() {
        SpiEbeanServer serv = (SpiEbeanServer)getDatabase();
        DdlGenerator gen = serv.getDdlGenerator();  //Line 251, JavaPlugin.class
        gen.runScript(false, gen.generateCreateDdl());
    }

That means getDatabase() is returning null for you, in turn implying "ebean" in JavaPlugin is null. "ebean" is initiali[zs]ed in this part of the code:

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Code:

protected final void initialize(PluginLoader loader, Server server,
            PluginDescriptionFile description, File dataFolder, File file,
            ClassLoader classLoader) {
        if (!initialized) {
            this.initialized = true;
            this.loader = loader;
            this.server = server;
            this.file = file;
            this.description = description;
            this.dataFolder = dataFolder;
            this.classLoader = classLoader;
            this.config = new Configuration(new File(dataFolder, "config.yml"));
            this.config.load();

            if (description.isDatabaseEnabled()) { //Db server instance is initiali[zs]ed here
                ServerConfig db = new ServerConfig();

                db.setDefaultServer(false);
                db.setRegister(false);
               db.setClasses(getDatabaseClasses());
                db.setName(description.getName());
                server.configureDbConfig(db);

                DataSourceConfig ds = db.getDataSourceConfig();
                ds.setUrl(replaceDatabaseString(ds.getUrl()));
                getDataFolder().mkdirs();

                ClassLoader previous = Thread.currentThread().getContextClassLoader();
                Thread.currentThread().setContextClassLoader(classLoader);
                ebean = EbeanServerFactory.create(db);
                Thread.currentThread().setContextClassLoader(previous);
            }
        }
    }

This means that isDatabaseEnabled() returns false.
Checking PluginDescriptionFile.class shows that you need to add a "database:" entry in your plugin.yml for this to work.
For example, this is mine:

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Code:

name: BuyAbilities
version: 0.8
main: com.rcjrrjcr.bukkitplugins.buyabilitiesplugin.BuyAbilities
description: Allows the purchase of temporary abilities with iConomy money.
authors:
    - rcjrrjcr
database: true
commands:
    bab:
        description: Alias for buyab
        usage: /bab [categories|category|page|current|buy|rent|rentuse|info|help]

    buyab:
        description: Buy abilities via this command
        usage: /buyab [categories|category|page|current|buy|rent|rentuse|info|help]

Works for me. However, I still get this error:

Code:

javax.persistence.PersistenceException: com.rcjrrjcr.bukkitplugins.buyabilitiesplugin.PurchasedAbility is NOT an Entity Bean registered with this server?
       at com.avaje.ebeaninternal.server.core.DefaultServer.createQuery(DefaultServer.java:1031)
       at com.avaje.ebeaninternal.server.core.DefaultServer.createQuery(DefaultServer.java:988)
       at com.avaje.ebeaninternal.server.core.DefaultServer.find(DefaultServer.java:1024)
       at com.rcjrrjcr.bukkitplugins.buyabilitiesplugin.storage.StorageEBeans.getPlayerData(StorageEBeans.java:31)
       at com.rcjrrjcr.bukkitplugins.buyabilitiesplugin.BuyAbilities.processLogonLogoff(BuyAbilities.java:757)
       at com.rcjrrjcr.bukkitplugins.buyabilitiesplugin.PlayerLoaderSaver.run(BuyAbilitiesPlayerListener.java:87)
       at org.bukkit.craftbukkit.scheduler.CraftWorker.run(CraftWorker.java:33)
       at java.lang.Thread.run(Unknown Source)

EDIT: I fail at bbCode :/

EDIT2: So much for this, eh?

Not like anyone knows how to use EBeans properly as of now.

 

I've gotten it to work, helped RightLegRed get it to work, it's really not that hard, just look at the HomeBukkit plugin: https://github.com/Bukkit/HomeBukkit

 

Ah. I stand corrected then. Forgot about the annotations. I still think that EBeans is too complicated.

 

You set database:true in your plugin description file, you override getDatabaseClasses() to return a list of models that you use, and then you go to town.

 

I did that, and I got a NFE.

Code:

 java.lang.NumberFormatException: For input string: "Jump: jump to aim in world world."
       at java.lang.NumberFormatException.forInputString(Unknown Source)
       at java.lang.Integer.parseInt(Unknown Source)
       at java.lang.Integer.valueOf(Unknown Source)
       at com.avaje.ebeaninternal.server.core.BasicTypeConverter.toInteger(BasicTypeConverter.java:286)
       at com.avaje.ebeaninternal.server.type.ScalarTypeInteger.toBeanType(ScalarTypeInteger.java:68)
       at com.avaje.ebeaninternal.server.type.ScalarTypeInteger.toBeanType(ScalarTypeInteger.java:36)
       at com.avaje.ebeaninternal.server.deploy.id.IdBinderSimple.convertSetId(IdBinderSimple.java:223)
       at com.avaje.ebeaninternal.server.deploy.BeanDescriptor.convertId(BeanDescriptor.java:1729)
       at com.avaje.ebeaninternal.server.persist.DefaultPersister.deleteMany(DefaultPersister.java:494)
       at com.avaje.ebeaninternal.server.core.DefaultServer.delete(DefaultServer.java:1808)
       at com.avaje.ebeaninternal.server.core.DefaultServer.delete(DefaultServer.java:1800)
       at com.rcjrrjcr.bukkitplugins.buyabilitiesplugin.storage.StorageEBeans.writePlayerData(StorageEBeans.java:38)
       at com.rcjrrjcr.bukkitplugins.buyabilitiesplugin.BuyAbilities.processLogonLogoff(BuyAbilities.java:775)
       at com.rcjrrjcr.bukkitplugins.buyabilitiesplugin.PlayerLoaderSaver.run(BuyAbilitiesPlayerListener.java:87)
       at org.bukkit.craftbukkit.scheduler.CraftWorker.run(CraftWorker.java:33)
       at java.lang.Thread.run(Unknown Source)

Why is Ebean parsing toString()??

 

Show me your code.

 

I had missed out getDatabaseClasses().

Thanks @Drakia

 

Source: https://github.com/rcjrrjcr/BuyAbilities/tree/ebeans
Even when I copy all the values to another class and store that, it happens too, except that it uses the toString() method inherited from Object.

 

Since you said you've moved it to another class etc, please give me an updated exception matching the current code.

 

Sorry. I got 503'd and my edited post went down the drain without me noticing.

Code:

 java.lang.NumberFormatException: For input string: "com.rcjrrjcr.bukkitplugins.buyabilitiesplugin.storage.StoredAbility$$EntityBean$BuyAbilities@1"
       at java.lang.NumberFormatException.forInputString(Unknown Source)
       at java.lang.Integer.parseInt(Unknown Source)
       at java.lang.Integer.valueOf(Unknown Source)
       at com.avaje.ebeaninternal.server.core.BasicTypeConverter.toInteger(BasicTypeConverter.java:286)
       at com.avaje.ebeaninternal.server.type.ScalarTypeInteger.toBeanType(ScalarTypeInteger.java:68)
       at com.avaje.ebeaninternal.server.type.ScalarTypeInteger.toBeanType(ScalarTypeInteger.java:36)
       at com.avaje.ebeaninternal.server.deploy.id.IdBinderSimple.convertSetId(IdBinderSimple.java:223)
       at com.avaje.ebeaninternal.server.deploy.BeanDescriptor.convertId(BeanDescriptor.java:1729)
       at com.avaje.ebeaninternal.server.persist.DefaultPersister.deleteMany(DefaultPersister.java:494)
       at com.avaje.ebeaninternal.server.core.DefaultServer.delete(DefaultServer.java:1808)
       at com.avaje.ebeaninternal.server.core.DefaultServer.delete(DefaultServer.java:1800)
       at com.rcjrrjcr.bukkitplugins.buyabilitiesplugin.storage.StorageEBeans.writePlayerData(StorageEBeans.java:37)
       at com.rcjrrjcr.bukkitplugins.buyabilitiesplugin.BuyAbilities.processLogonLogoff(BuyAbilities.java:775)
       at com.rcjrrjcr.bukkitplugins.buyabilitiesplugin.PlayerLoaderSaver.run(BuyAbilitiesPlayerListener.java:87)
       at org.bukkit.craftbukkit.scheduler.CraftWorker.run(CraftWorker.java:33)
       at java.lang.Thread.run(Unknown Source)

I've been poking around in the source of EBeans to find where it went wrong but it's too complex for me to understand.