New Openfire Plugin

Install requirements

$ sudo pacman -S \
	intellij-idea-community-edition \
	jre8-openjdk \
	maven

Environment

$ export WORKSPACE_FOLDER=/home/fabio/Work/avantech

Openfire

Getting the code

$ git clone --depth=1 https://github.com/igniterealtime/Openfire.git openfire

Building the project

$ cd openfire
$ mvn verify
$ cd ..

A dumb plugin

Creating folders

$ mkdir -p example-plugin/src/web
$ mkdir -p example-plugin/src/java/br/com/example

Creating the pom.xml

$ cat > example-plugin/pom.xml <<'EOF'
<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>
    <parent>
        <artifactId>plugins</artifactId>
        <groupId>org.igniterealtime.openfire</groupId>
        <version>4.3.0-beta</version>
    </parent>
    <groupId>org.igniterealtime.openfire.plugins</groupId>

    <artifactId>exampleplugin</artifactId>
    <version>0.1</version>
    <name>Example Plugin</name>
    <description>A start point to create a new plugin</description>

    <organization>
        <name>Example Organization</name>
        <url>https://example-url.com.br/</url>
    </organization>

    <developers>
        <developer>
            <id>exampleuserid</id>
            <name>Example Author</name>
            <email>[email protected]</email>
            <organization>Example Organization</organization>
        </developer>
    </developers>

    <build>
        <sourceDirectory>src/java</sourceDirectory>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <!-- FIXME: This temporarily overrides the provided plugin, to set appendAssemblyId and attach to true.
                     This change should be pushed down to the parent project, after the development to distribute plugins via Maven has settled. -->
                <artifactId>maven-assembly-plugin</artifactId>
                <version>2.6</version>
                <dependencies>
                    <dependency>
                        <groupId>org.igniterealtime.openfire.plugins</groupId>
                        <artifactId>openfire-plugin-assembly-descriptor</artifactId>
                        <version>${openfire.version}</version>
                    </dependency>
                </dependencies>
                <executions>
                    <execution>
                        <id>make-assembly</id>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                        <configuration>
                            <appendAssemblyId>true</appendAssemblyId>
                            <finalName>${plugin.name}</finalName>
                            <attach>true</attach>
                            <!-- This is where we use our shared assembly descriptor -->
                            <descriptorRefs>
                                <descriptorRef>openfire-plugin-assembly</descriptorRef>
                            </descriptorRefs>
                        </configuration>
                    </execution>
                </executions>
                <!-- End of override -->
            </plugin>
            <!-- Compiles the Openfire Admin Console JSP pages. -->
            <plugin>
                <groupId>org.eclipse.jetty</groupId>
                <artifactId>jetty-jspc-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

    <dependencies>
    </dependencies>

    <distributionManagement>
        <!-- Repository in which we deploy this project, when desired. -->
        <repository>
            <id>igniterealtime</id>
            <name>Ignite Realtime Repository</name>
            <url>https://www.igniterealtime.org/archiva/repository/maven/</url>
        </repository>
    </distributionManagement>

    <repositories>
        <!-- Where we obtain dependencies. -->
        <repository>
            <id>igniterealtime</id>
            <name>Ignite Realtime Repository</name>
            <url>https://igniterealtime.org/archiva/repository/maven/</url>
        </repository>
    </repositories>

    <pluginRepositories>
        <!-- Typically used to retrieve Maven plugins used by this project from. This
             apparently is also used to obtain the dependencies _used by_ plugins
             (eg: openfire-plugin-assembly-descriptor) -->
        <pluginRepository>
            <id>igniterealtime</id>
            <name>Ignite Realtime Repository</name>
            <url>https://igniterealtime.org/archiva/repository/maven/</url>
        </pluginRepository>
    </pluginRepositories>
</project>
EOF

Creating the plugin.xml

$ cat > example-plugin/plugin.xml <<'EOF' 
<?xml version="1.0" encoding="UTF-8"?>
<plugin>
    <class>br.com.example.ExamplePlugin</class>
    <name>Example Plugin</name>
    <description>A start point to create a new plugin</description>
    <author>Example author</author>
    <version>${project.version}</version>
    <date>1/2/2019</date>
    <minServerVersion>4.3.2</minServerVersion>
</plugin>
EOF

Creating the plugin main class

$ cat > example-plugin/src/java/br/com/example/ExamplePlugin.java <<'EOF' 
package br.com.example;

import java.io.File;
import java.security.Security;
import org.jivesoftware.openfire.container.Plugin;
import org.jivesoftware.openfire.container.PluginManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
  * This class initialize the ExamplePlugin
  */
public class ExamplePlugin implements Plugin
{
    private static final Logger Log = LoggerFactory.getLogger( ExamplePlugin.class );

    @Override
    public void initializePlugin( PluginManager manager, File pluginDirectory )
    {
        Log.info("Initializing Example Plugin");
    }

    @Override
    public void destroyPlugin()
    {
        Log.info("Destroying Example Plugin");
    }
}
EOF

Verify if dumb plugin compile

$ cd example-plugin
$ mvn verify

Development

Setting up IDEA

Execute idea
Click on Import Project
Select the Openfire directory
Select Maven option and clik on Next
Click on Next
Click on Next
Click on Next
Check if JRE is select and click on Next
Give Project name the value openfire and click on Finish
Click on File > Project Structure
Got to modules section
Click on + sign in the top of second column
Click on Import module
Select example-plugin
Select Maven option and clik on Next
Click on Next
Click on Next
Click on Finish
Click on Ok
Click on Run > Edit Configurations
Click on + sign and select Remote
Change the Name from Unamed to Attach on Openfire
Copy the content of Command line arguments for remote JVM, it will be something like -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005

Running Openfire

The only I could have breakpoints during development was adding manually the options -DpluginDirs, -Dexample-plugin.classes, -Dexample-plugin.webRoot. Even passing these options, depending the type of change made in source code, it will be necessary to restart Openfire.

$ cd openfire
$ java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 \
	-Dlog4j.configurationFile=${WORKSPACE_FOLDER}/openfire/distribution/target/distribution-base/lib/log4j2.xml \
	-server \
	-DopenfireHome="${WORKSPACE_FOLDER}/openfire/distribution/target/distribution-base" \
	-DpluginDirs="${WORKSPACE_FOLDER}/example-plugin" \
	-Dexample-plugin.classes="target/classes" \
	-Dexample-plugin.webRoot="src/web" \
	-Dopenfire.lib.dir="${WORKSPACE_FOLDER}/openfire/distribution/target/distribution-base/lib" \
	-classpath "${WORKSPACE_FOLDER}/openfire/distribution/target/distribution-base/lib/startup.jar" \
	-jar "${WORKSPACE_FOLDER}/openfire/distribution/target/distribution-base/lib/startup.jar"

You should see an output like

Listening for transport dt_socket at address: 5005
Openfire 4.4.0 Alpha [Feb 21, 2019 5:05:11 PM]
Admin console listening at:
  http://localhost:9090
  https://localhost:9091
Successfully loaded plugin 'admin'.
Plugin 'example-plugin' is running in development mode.
Successfully loaded plugin 'example-plugin'.
Successfully loaded plugin 'search'.
Finished processing all plugins.

That is it. Have fun

fabiomontefuscolo/new-of-plugin-dev.markdown