Java esl client for netty4

esl-client-netty4 is a Java-based Event Socket Library for the FreeSWITCH project.

This project is a fork of the unmaintained, original project at:
https://freeswitch.org/stash/projects/FS/repos/freeswitch-contrib/browse/dvarnes/java/esl-client

Status: In Progress...

About

This page documents the org.freeswitch.esl.client library maintained in the freeswitch-contrib git repository. See Java ESL page for overview of other options for using Java with the FreeSWITCH Event Socket.

Features

• Licensed under Apache License version 2 http://www.apache.org/licenses/LICENSE-2.0
• Runtime dependency on Netty (Apache License) and SLF4j (MIT License) libraries
• No native library runtime dependencies
• ESL Inbound and Outbound support, see Event Socket and Event Socket Outbound.
• OSGi ready
• Built using maven

Runtime dependencies

If you download and install the jar(s) manually, you must also supply the following jars on your Java classpath

• netty-4.1.50.Final.jar for async socket comms
• slf4j-api-1.7.30.jar for logging
• guava:29.0-jre Google core libraries for Java
• An slf4j implementation, use slf4j-nop.jar if no logging required.

Example

package com.ecovate.freeswitch.lb;

import com.google.common.base.Throwables;
import org.freeswitch.esl.client.inbound.Client;
import org.freeswitch.esl.client.inbound.IEslEventListener;
import org.freeswitch.esl.client.internal.IModEslApi.EventFormat;
import org.freeswitch.esl.client.outbound.Context;
import org.freeswitch.esl.client.outbound.IClientHandler;
import org.freeswitch.esl.client.outbound.IClientHandlerFactory;
import org.freeswitch.esl.client.outbound.SocketClient;
import org.freeswitch.esl.client.transport.event.EslEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.net.InetSocketAddress;

public class FreeSwitchEventListener {

  private static Logger logger = LoggerFactory.getLogger(FreeSwitchEventListener.class);

  public static void main(String[] args) {
    try {

      final Client inboudClient = new Client();
      inboudClient.connect(new InetSocketAddress("localhost", 8021), "ClueCon", 10);
      inboudClient.addEventListener(new IEslEventListener() {
        @Override
        public void onEslEvent(EslEvent eslEvent) {

        }
      });
      inboudClient.setEventSubscriptions(EventFormat.PLAIN, "all");

      final SocketClient outboundServer = new SocketClient(
        new InetSocketAddress("localhost", 8084),
        new IClientHandlerFactory() {
          @Override
          public IClientHandler createClientHandler() {
            return new IClientHandler() {
              @Override
              public void handleEslEvent(Context context, EslEvent eslEvent) {
              }

              @Override
              public void onConnect(Context context, EslEvent eslEvent) {
              }
            };
          }
        });


    } catch (Throwable t) {
      Throwables.propagate(t);
    }
  }

}

From maven central repository

Assuming you are using a build tool that can resolve dependencies from the maven 2 central repository, add the following to your project pom.xml

• Maven

<dependency>
  <groupId>org.freeswitch.esl.client</groupId>
  <artifactId>esl-client-netty4</artifactId>
  <version>0.9.2</version>
  <type>pom</type>
</dependency>

• Gradle

implementation 'org.freeswitch.esl.client:esl-client-netty4:0.9.2'

• Ivy

<dependency org='org.freeswitch.esl.client' name='esl-client-netty4' rev='0.9.2'>
  <artifact name='esl-client-netty4' ext='pom' ></artifact>
</dependency>

Authors

• Dan Cunningham
• Dave Rusek
• David Varnes (original author)
• Tobias Bieniek

License

esl-client-netty4 is licensed under the Apache License, version 2.