# Beginner - Errors following Wowza IDE Guide

**URL:** <https://community.wowza.com/t/beginner-errors-following-wowza-ide-guide/40253>\
**Category:** Wowza Developer Dojo\
**Tags:** wowza-streaming-server-java-api\
**Created:** [May 2, 2014, 8:35am UTC](https://community.wowza.com/t/beginner-errors-following-wowza-ide-guide/40253 "2014-05-02T08:35:25Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![Frank\_Troglauer](https://avatars.discourse-cdn.com/v4/letter/f/779978/32.png) [@Frank\_Troglauer](https://community.wowza.com/u/Frank_Troglauer)\
**Post date:** [May 2, 2014, 8:35am UTC](https://community.wowza.com/t/beginner-errors-following-wowza-ide-guide/40253/1 "2014-05-02T08:35:25Z")

</div>

Good morning,

Before the Wowza Streaming Engine came out I followed the IDE Guide for Wowza Media Server. Do the same steps still apply? I have Eclipse installed and can go to New Project but it says “Wowza Media Server Project”. Do I need to do any update for it to say “Wowza Streaming Engine”?

Anywho I have been following the steps again since it has been a few months and I need a refreshed. I get to the point where it wants me to run the module from Eclipse so I shut down Wowza on my computer and hit run and get the following errors.

Page 13 Server Startup as reference.

Errors

Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.SystemUtils

at java.net.URLClassLoader$1.run(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

… 11 more

All I have done so far is follow the instructions of creating the module and importing the ModuleServerSide.java so I don’t think there is anything I could have really messed up yet.

**EnableDisable.java**

```auto
package com.mycompany.wms.module;
import com.wowza.wms.application.*;
import com.wowza.wms.amf.*;
import com.wowza.wms.client.*;
import com.wowza.wms.module.*;
import com.wowza.wms.request.*;
import com.wowza.wms.stream.*;
import com.wowza.wms.rtp.model.*;
import com.wowza.wms.httpstreamer.model.*;
import com.wowza.wms.httpstreamer.cupertinostreaming.httpstreamer.*;
import com.wowza.wms.httpstreamer.smoothstreaming.httpstreamer.*;
public class EnableDisable extends ModuleBase {
	public void doSomething(IClient client, RequestFunction function,
			AMFDataList params) {
		getLogger().info("doSomething");
		sendResult(client, params, "Hello Wowza");
	}
	public void onAppStart(IApplicationInstance appInstance) {
		String fullname = appInstance.getApplication().getName() + "/"
				+ appInstance.getName();
		getLogger().info("onAppStart: " + fullname);
	}
	public void onAppStop(IApplicationInstance appInstance) {
		String fullname = appInstance.getApplication().getName() + "/"
				+ appInstance.getName();
		getLogger().info("onAppStop: " + fullname);
	}
	public void onConnect(IClient client, RequestFunction function,
			AMFDataList params) {
		getLogger().info("onConnect: " + client.getClientId());
	}
	public void onConnectAccept(IClient client) {
		getLogger().info("onConnectAccept: " + client.getClientId());
	}
	public void onConnectReject(IClient client) {
		getLogger().info("onConnectReject: " + client.getClientId());
	}
	public void onDisconnect(IClient client) {
		getLogger().info("onDisconnect: " + client.getClientId());
	}
}

```

**ModuleServerSide.java**

```auto
package com.mycompany.wms.module;
import java.util.*;
import com.wowza.wms.module.*;
import com.wowza.wms.client.*;
import com.wowza.wms.amf.*;
import com.wowza.wms.request.*;
import com.wowza.wms.logging.*;
public class ModuleServerSide extends ModuleBase
{
	// receiving simple parameters from the client
	public void c2sParamsSimple(IClient client, RequestFunction function, AMFDataList params)
	{
		String res = "";
		WMSLogger log = getLogger();
		String param1 = getParamString(params, PARAM1);
		int param2 = getParamInt(params, PARAM2);
		boolean param3 = getParamBoolean(params, PARAM3);
		Date param4 = getParamDate(params, PARAM4);
		res += "param1: "+param1+"\n";
		res += "param2: "+param2+"\n";
		res += "param3: "+param3+"\n";
		res += "param4: "+param4+"\n";
		log.info(res);
		sendResult(client, params, res);
	}
	// receiving an object from the client
	public void c2sParamsObject(IClient client, RequestFunction function, AMFDataList params)
	{
		String res = "";
		WMSLogger log = getLogger();
		AMFDataObj param1 = (AMFDataObj)getParam(params, PARAM1);
		// direct method for getting object properties
		String val1 = param1.getString("val1");
		int val2 = param1.getInt("val2");
		boolean val3 = param1.getBoolean("val3");
		Date val4 = param1.getDate("val4");
		res += "\nDirect\n";
		res += "param1: val1="+val1+"\n";
		res += "param1: val2="+val2+"\n";
		res += "param1: val3="+val3+"\n";
		res += "param1: val4="+val4+"\n";
		res += "\nInspect\n";
		// method to inspect object to discover properties
		List keys = param1.getKeys();
		Iterator iter = keys.iterator();
		while(iter.hasNext())
		{
			String key = (String)iter.next();
			AMFDataItem value = (AMFDataItem)param1.get(key);
			String typeStr = "unknown";
			switch (value.getType())
			{
			default:
			case AMFDataItem.DATA_TYPE_UNDEFINED:
			case AMFDataItem.DATA_TYPE_UNKNOWN:
			case AMFDataItem.DATA_TYPE_NULL:
				typeStr = "null";
				break;
			case AMFDataItem.DATA_TYPE_NUMBER:
				typeStr = "number";
				// to extract value use intValue(), shortValue(), longValue(), doubleValue(), floatValue(), byteValue()
				break;
			case AMFDataItem.DATA_TYPE_BOOLEAN:
				typeStr = "boolean";
				// to extract value use booleanValue()
				break;
			case AMFDataItem.DATA_TYPE_STRING:
				typeStr = "string";
				break;
			case AMFDataItem.DATA_TYPE_DATE:
				typeStr = "date";
				break;
			}
			res += "param1: "+key+"="+value.toString()+" ("+typeStr+")"+"\n";
		}
		log.info(res);
		sendResult(client, params, res);
	}
	// receiving an array of strings from the client
	public void c2sParamsArray(IClient client, RequestFunction function, AMFDataList params)
	{
		String res = "";
		WMSLogger log = getLogger();
		AMFDataMixedArray param1 = getParamMixedArray(params, PARAM1);
		int len = param1.size();
		for(int i=0;i<len;i++)
		{
			String value = param1.getString(i);
			res += "param1: ["+i+":"+param1.getKey(i)+"]="+value+"\n";
		}
		log.info(res);
		sendResult(client, params, res);
	}
	// receiving an array of objects from the client
	public void c2sParamsArrayOfObjects(IClient client, RequestFunction function, AMFDataList params)
	{
		String res = "";
		WMSLogger log = getLogger();
		AMFDataMixedArray param1 = getParamMixedArray(params, PARAM1);
		int len = param1.size();
		for(int i=0;i<len;i++)
		{
			AMFDataObj valueObj = param1.getObject(i);
			res += "param1: ["+i+":"+param1.getKey(i)+"]"+"\n";
			String val1 = valueObj.getString("val1");
			int val2 = valueObj.getInt("val2");
			boolean val3 = valueObj.getBoolean("val3");
			Date val4 = valueObj.getDate("val4");
			res += "val1: "+val1+"\n";
			res += "val2: "+val2+"\n";
			res += "val3: "+val3+"\n";
			res += "val4: "+val4+"\n";
		}
		log.info(res);
		sendResult(client, params, res);
	}
	// returning a string to the client
	public void c2sReturnString(IClient client, RequestFunction function, AMFDataList params)
	{
		String res = "";
		WMSLogger log = getLogger();
		res = "Hello Wowza";
		log.info(res);
		sendResult(client, params, res);
	}
	// returning an integer to the client
	public void c2sReturnInt(IClient client, RequestFunction function, AMFDataList params)
	{
		String res = "";
		WMSLogger log = getLogger();
		int resInt = 4325;
		res = "int="+resInt;
		log.info(res);
		sendResult(client, params, resInt);
	}
	// returning a boolean to the client
	public void c2sReturnBoolean(IClient client, RequestFunction function, AMFDataList params)
	{
		String res = "";
		WMSLogger log = getLogger();
		boolean resBoolean = true;
		res = "boolean="+resBoolean;
		log.info(res);
		sendResult(client, params, resBoolean);
	}
	// returning an array of strings
	public void c2sReturnArray(IClient client, RequestFunction function, AMFDataList params)
	{
		String res = "";
		WMSLogger log = getLogger();
		AMFDataArray retArray = new AMFDataArray();
		retArray.add(new AMFDataItem("Hello Wowza 1"));
		retArray.add(new AMFDataItem("Hello Wowza 2"));
		retArray.add(new AMFDataItem("Hello Wowza 3"));
		res = retArray.toString();
		log.info(res);
		sendResult(client, params, retArray);
	}
	// returning an object to the client
	public void c2sReturnObject(IClient client, RequestFunction function, AMFDataList params)
	{
		String res = "";
		WMSLogger log = getLogger();
		AMFDataObj retObj = new AMFDataObj();
		retObj.put("val1", new AMFDataItem("Hello Wowza 1"));
		retObj.put("val2", new AMFDataItem(3456));
		retObj.put("val3", new AMFDataItem(true));
		res = retObj.toString();
		log.info(res);
		sendResult(client, params, retObj);
	}
	// returning an array objects to the client
	public void c2sReturnArrayOfObjects(IClient client, RequestFunction function, AMFDataList params)
	{
		String res = "";
		WMSLogger log = getLogger();
		AMFDataArray retArray = new AMFDataArray();
		AMFDataObj retObj = null;
		retObj = new AMFDataObj();
		retObj.put("val1", new AMFDataItem("Hello Wowza 1"));
		retObj.put("val2", new AMFDataItem(3456));
		retObj.put("val3", new AMFDataItem(true));
		retArray.add(retObj);
		retObj = new AMFDataObj();
		retObj.put("val1", new AMFDataItem("Hello Wowza 2"));
		retObj.put("val2", new AMFDataItem(3457));
		retObj.put("val3", new AMFDataItem(true));
		retArray.add(retObj);
		retObj = new AMFDataObj();
		retObj.put("val1", new AMFDataItem("Hello Wowza 3"));
		retObj.put("val2", new AMFDataItem(3458));
		retObj.put("val3", new AMFDataItem(true));
		retArray.add(retObj);
		res = retArray.toString();
		log.info(res);
		sendResult(client, params, retArray);
	}
	// calling from the server to the client
	public void s2cCallback(IClient client, RequestFunction function, AMFDataList params)
	{
		String handlerName = getParamString(params, PARAM1);
		// calling the client and sending simple parameters
		if (handlerName.equals("s2cParamsSimple"))
		{
			class s2cParamsSimpleResult extends ModuleBase implements IModuleCallResult
			{
				public void onResult(IClient client, RequestFunction function, AMFDataList params)
				{
					WMSLogger log = getLogger();
					String param1 = getParamString(params, PARAM1);
					log.info(param1);
				}
			}
			client.call(handlerName, new s2cParamsSimpleResult(), "Hello Wowza", 1432, true, new Date());
		}
		// calling the client and sending an object
		else if (handlerName.equals("s2cParamsObject"))
		{
			class s2cParamsObjectResult extends ModuleBase implements IModuleCallResult
			{
				public void onResult(IClient client, RequestFunction function, AMFDataList params)
				{
					WMSLogger log = getLogger();
					AMFDataObj param1 = getParamObj(params, PARAM1);
					log.info(param1.toString());
				}
			}
			AMFDataObj retObj = new AMFDataObj();
			retObj.put("val1", new AMFDataItem("Hello Wowza"));
			retObj.put("val2", new AMFDataItem(3456));
			retObj.put("val3", new AMFDataItem(true));
			client.call(handlerName, new s2cParamsObjectResult(), retObj);
		}
		// calling the client and sending an array of strings
		else if (handlerName.equals("s2cParamsArray"))
		{
			class s2cParamsArrayResult extends ModuleBase implements IModuleCallResult
			{
				public void onResult(IClient client, RequestFunction function, AMFDataList params)
				{
					WMSLogger log = getLogger();
					AMFDataMixedArray param1 = getParamMixedArray(params, PARAM1);
					log.info(param1.toString());
				}
			}
			AMFDataArray retArray = new AMFDataArray();
			retArray.add(new AMFDataItem("Hello Wowza 1"));
			retArray.add(new AMFDataItem("Hello Wowza 2"));
			retArray.add(new AMFDataItem("Hello Wowza 3"));
			client.call(handlerName, new s2cParamsArrayResult(), retArray);
		}
		// calling the client and sending an array of objects
		else if (handlerName.equals("s2cParamsArrayOfObjects"))
		{
			class s2cParamsArrayOfObjectsResult extends ModuleBase implements IModuleCallResult
			{
				public void onResult(IClient client, RequestFunction function, AMFDataList params)
				{
					WMSLogger log = getLogger();
					AMFDataMixedArray param1 = getParamMixedArray(params, PARAM1);
					log.info(param1.toString());
				}
			}
			AMFDataArray retArray = new AMFDataArray();
			AMFDataObj retObj = null;
			retObj = new AMFDataObj();
			retObj.put("val1", new AMFDataItem("Hello Wowza 1"));
			retObj.put("val2", new AMFDataItem(3456));
			retObj.put("val3", new AMFDataItem(true));
			retArray.add(retObj);
			retObj = new AMFDataObj();
			retObj.put("val1", new AMFDataItem("Hello Wowza 2"));
			retObj.put("val2", new AMFDataItem(3457));
			retObj.put("val3", new AMFDataItem(true));
			retArray.add(retObj);
			retObj = new AMFDataObj();
			retObj.put("val1", new AMFDataItem("Hello Wowza 3"));
			retObj.put("val2", new AMFDataItem(3458));
			retObj.put("val3", new AMFDataItem(true));
			retArray.add(retObj);
			client.call(handlerName, new s2cParamsArrayOfObjectsResult(), retArray);
		}
	}
}

```

![](http://i.imgur.com/Z1VkfGN.png)

---

<div class="post-metadata">

**Author:** ![sal\_jefferson](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)\
**Post date:** [May 2, 2014, 8:07am UTC](https://community.wowza.com/t/beginner-errors-following-wowza-ide-guide/40253/2 "2014-05-02T08:07:25Z")

</div>

You probably have the Wowza Transcoder enabled. Take a look at this article:

[How to use Wowza IDE with Wowza Transcoder AddOn](https://www.wowza.com/docs/how-to-use-eclipse-ide-with-wowza-transcoder)

Salvadore

---

<div class="post-metadata">

**Author:** ![sal\_jefferson](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)\
**Post date:** [May 2, 2014, 8:24am UTC](https://community.wowza.com/t/beginner-errors-following-wowza-ide-guide/40253/3 "2014-05-02T08:24:04Z")

</div>

Make sure Wowza is not already running before you start through Eclipse.

Salvadore

---

<div class="post-metadata">

**Author:** ![sal\_jefferson](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)\
**Post date:** [May 2, 2014, 8:58am UTC](https://community.wowza.com/t/beginner-errors-following-wowza-ide-guide/40253/4 "2014-05-02T08:58:08Z")

</div>

Great, sounds like you got it working. Glad I could help.

Salvadore

---

<div class="post-metadata">

**Author:** ![Frank\_Troglauer](https://avatars.discourse-cdn.com/v4/letter/f/779978/32.png) [@Frank\_Troglauer](https://community.wowza.com/u/Frank_Troglauer)\
**Post date:** [May 2, 2014, 9:16am UTC](https://community.wowza.com/t/beginner-errors-following-wowza-ide-guide/40253/5 "2014-05-02T09:16:41Z")

</div>

Thanks a ton Salvador! Though I now get this error in the console.

INFO server comment - RESTServer: Bind attempt ([any]:8087)

WARN server comment - RESTServer: Bind failed, try again ([any]:8087): java.net.BindException: Address already in use: bind|at sun.nio.ch.Net.bind0(Native Method)|at sun.nio.ch.Net.bind(Unknown Source)|at sun.nio.ch.Net.bind(Unknown Source)|at sun.nio.ch.ServerSocketChannelImpl.bind(Unknown Source)|at sun.nio.ch.ServerSocketAdaptor.bind(Unknown Source)|

---

<div class="post-metadata">

**Author:** ![Frank\_Troglauer](https://avatars.discourse-cdn.com/v4/letter/f/779978/32.png) [@Frank\_Troglauer](https://community.wowza.com/u/Frank_Troglauer)\
**Post date:** [May 2, 2014, 9:48am UTC](https://community.wowza.com/t/beginner-errors-following-wowza-ide-guide/40253/6 "2014-05-02T09:48:35Z")

</div>

Oh duh! _facepalm_ Thanks Salvadore.