Using ProtocolLibs packet listener

Hello! I am trying to use ProtocolLib's packet listener.

Code:

    @Override
    public void onEnable() {
        instance = this;

        getServer().getPluginManager().registerEvents(this, this);
       // line below this is error line, NPE
        ProtocolLibrary.getProtocolManager().addPacketListener(new PacketAdapter(this,
ListenerPriority.NORMAL, PacketType.Play.Client.RESOURCE_PACK_STATUS) {
            @Override
            public void onPacketSending(PacketEvent event) {
                Bukkit.broadcastMessage("1");
                if (event.getPacketType() == PacketType.Play.Client.RESOURCE_PACK_STATUS) {
                    Bukkit.broadcastMessage(event.getPacket().getStrings().read(0));
                }
            }
        });
    }

Only issue is that there is an NPE. Why is this?

I use maven and shade in ProtocolLib when I save the project.

Code:

<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>me.heyawesomepeople.forceresourcepack</groupId>
    <artifactId>ForceResourcePack</artifactId>
    <version>-SNAPSHOT</version>

    <repositories>
        <repository>
            <id>spigot-repo</id>
            <url>https://hub.spigotmc.org/nexus/content/groups/public/</url>
        </repository>
        <repository>
            <id>shadowvolt-repo</id>
            <url>http://ci.shadowvolt.com/plugin/repository/everything/</url>
        </repository>
    </repositories>

    <dependencies>
        <dependency>
            <groupId>org.spigotmc</groupId>
            <artifactId>spigot-api</artifactId>
            <version>1.8.3-R0.1-SNAPSHOT</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.comphenix.protocol</groupId>
            <artifactId>ProtocolLib</artifactId>
            <version>3.6.3-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>test</groupId>
            <artifactId>x</artifactId>
            <version>1.0</version>
            <scope>system</scope>
            <systemPath>C:\Users\Bryan\Dropbox\Bukkit Coding\Dependincies\Craftbukkit.jar</systemPath>
        </dependency>
    </dependencies>


    <build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>2.3.1</version>
                    <configuration>
                        <source>1.7</source>
                        <target>1.7</target>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>1.7</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>

                            <transformers>
                                <transformer
                                    implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <mainClass>com.comphenix.protocol</mainClass>
                                </transformer>
                            </transformers>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

        </plugins>
    </build>

</project>

I t seems to work, as my plugin file size is now like 1600kb. But yeah, any ideas?

- HeyAwesomePeople

 

@HeyAwesomePeople What line is the NPE on? It's probably a good idea to read this.

 

@nverdier

http://gyazo.com/56334f968ce818888fd11b82139859b9

I know, yeah, protocol lib is the problem but why and how do I use protocol lib now?

 

@HeyAwesomePeople But what line is the NPE on? Is there a stack trace? Please post that.