[Solved] AbstractMethodError when calling commands?

Sponge Sponge Development
1

I recently updated to sponge-1.8-1487-2.1DEV-525. It appears whenever one of my classes that implements CommandCallable is called (when commands are called), an AbstractMethodError occurs. I see the version of the api I should be using in the sponge version set is 2.1, and I have confirmed this is what is in my Maven Dependencies. Does this mean that CommandCallable should no longer be used? If so, should I convert everything to CommandExecutor? Or what? Also, where is a good place to find the latest javadoc? I can only find the 2.0 javadoc. Thanks!

2

Hereā€™s the specific error Iā€™m getting:

[15:33:36] [Server thread/ERROR] [Sponge]: Error occurred while executing command ā€˜set hiā€™ for source EntityPlayerMP[ā€˜soccer66ā€™/44, l=ā€˜worldā€™, x=1025.98, y=100.20, z=767.38]: null
java.lang.AbstractMethodError
at org.spongepowered.api.util.command.dispatcher.SimpleDispatcher.process(SimpleDispatcher.java:344) ~[SimpleDispatcher.class:1.8-1487-2.1DEV-525+unknown-b525.git-unknown]
at org.spongepowered.api.service.command.SimpleCommandService.process(SimpleCommandService.java:243) [SimpleCommandService.class:1.8-1487-2.1DEV-525+unknown-b525.git-unknown]
at net.minecraft.command.ServerCommandManager.func_71556_a(SourceFile:80) [cl.class:?]
at net.minecraft.network.NetHandlerPlayServer.func_147361_d(NetHandlerPlayServer.java:812) [rj.class:?]
at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:791) [rj.class:?]
at net.minecraft.network.play.client.C01PacketChatMessage.func_180757_a(SourceFile:37) [lu.class:?]
at net.minecraft.network.play.client.C01PacketChatMessage.func_148833_a(SourceFile:9) [lu.class:?]
at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) [ih.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_05]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_05]
at net.minecraftforge.fml.common.FMLCommonHandler.callFuture(FMLCommonHandler.java:714) [FMLCommonHandler.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:656) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:364) [po.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:598) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:478) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_05]

3

Could you show the code for this command?

EDIT: You may want to refresh your maven dependencies. I did this to mine and found that the process method now returns CommandResult, not a CommandResult Optional.

1 Like
4

Ignore this, was wrong.

5

Thatā€™s really weird! I updated my maven dependencies and the sponge-2.1-SNAPSHOT.jar still shows the CommandCallable interface as the following???

public abstract interface CommandCallable
{
public abstract Optional process(CommandSource paramCommandSource, String paramString)
throws CommandException;

public abstract List getSuggestions(CommandSource paramCommandSource, String paramString)
throws CommandException;

public abstract boolean testPermission(CommandSource paramCommandSource);

public abstract Optional<? extends Text> getShortDescription(CommandSource paramCommandSource);

public abstract Optional<? extends Text> getHelp(CommandSource paramCommandSource);

public abstract Text getUsage(CommandSource paramCommandSource);
}

6

What does your pom.xml look like? What IDE are you using?

1 Like
7

Iā€™m using eclipse. Hereā€™s my pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>MyIDHere</groupId>
  <artifactId>MyArtifactIDHere</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <dependencies>
  	<dependency>
  		<groupId>org.spongepowered</groupId>
  		<artifactId>spongeapi</artifactId>
  		<version>2.1-SNAPSHOT</version>
  		<scope>provided</scope>
  	</dependency>
  </dependencies>
</project>
8

You should have the repository along with the dependency:

View here

To update your dependencies:

  1. Right-Click Project > Maven > Update Project
  2. Select the ā€œForce updates of snapshots/releasesā€ checkbox
  3. Click OK
1 Like
9

I did everything exactly like you said (changed my pom.xml to match yours and forced update of snapshots) and still have:

public abstract interface CommandCallable
{
public abstract Optional process(CommandSource paramCommandSource, String paramString)
throws CommandException;

public abstract List getSuggestions(CommandSource paramCommandSource, String paramString)
throws CommandException;

public abstract boolean testPermission(CommandSource paramCommandSource);

public abstract Optional<? extends Text> getShortDescription(CommandSource paramCommandSource);

public abstract Optional<? extends Text> getHelp(CommandSource paramCommandSource);

public abstract Text getUsage(CommandSource paramCommandSource);
}

10

Hmmā€¦
Which checkboxes are checked in the update project menu?

1 Like
11

Not sure if that link will work

My pom.xml is now:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>PixelMasters</groupId>
  <artifactId>PM2Sponge</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <repositories>
    <repository>
        <id>sponge-maven-repo</id>
        <name>Sponge maven repo</name>
        <url>http://repo.spongepowered.org/maven</url>
        <releases>
            <enabled>true</enabled>
        </releases>
        <snapshots>
            <enabled>true</enabled>
        </snapshots>
    </repository>
  </repositories>
	
  <dependencies>
    <dependency>
        <groupId>org.spongepowered</groupId>
        <artifactId>spongeapi</artifactId>
        <version>2.1-SNAPSHOT</version>
        <scope>provided</scope>
    </dependency>
</dependencies>
</project>
12

This is very odd. If you create a new project, will the correct dependencies load?

1 Like
13

Wtf? Yes it workedā€¦ Iā€™m not sure why though? Iā€™ll delete my pom.xml in my current project and remake to see if that works?

14

Yes try that, and then refresh both the Maven dependencies and the actual project.

1 Like
15

There we go, now it shows process as returning CommandResult! I think I was messing something up with the Pom.xml, mainly because of eclipseā€™s annoying, confusing gui for it. But I should be good now, thank you so much for the help @Flibio ! Iā€™ll post here again if I have any problems when I actually run the updated code.

Edit: One more thing, do you happen to know where the best place to find the most updated javadoc would be?

16

No problem! For the pom.xml editing, I right-click it > Open With > Text Editor. This is a lot easier to do than using that GUI!

For javadocs: http://spongepowered.github.io/SpongeAPI/. That is the only java doc location I know of.

17

official Javadocs should be here:
https://jd.spongepowered.org/

idk if theyā€™re beeing built automated or manually.

18

Awesome thanks! And I guess I was just confused because they havenā€™t updated the javadocā€™s version to 2.1 yet?

19

If you absolute latest code for the SpongeAPI, you could find it on GitHub: GitHub - SpongePowered/SpongeAPI: A Minecraft plugin API

20

Okay will do. And I have confirmed the commands work again in game :smile:

1 Like