Control aliasing of stream names with the Wowza Streaming Engine Java API

This example demonstrates the basic framework for implementing the Wowza Streaming Engine™ Java API IMediaStreamNameAliasProvider3 interface, which is used for aliasing stream names. Use this interface instead of the StreamNameAlias AddOn or .stream files when you need programmatic control of aliasing.

This interface provides several resolvePlayAlias methods, one of which is triggered each time a client plays a stream. The stream name that is sent to the Wowza media server by a client is run through the IMediaStreamNameAliasProvider3 interface. If a match is found for the stream name, it's transformed. If no match is found, playback is blocked. There several overloads of resolvePlayAlias, one for each client type.

The resolveStreamAlias methods are executed by the WebRTC subsystem for WebRTC streams or the MediaCaster subsystem for re-streaming. When you start a stream using StreamManager, StartUpStreams.xml or MediaCaster API, the MediaCaster subsystem provides the following streaming functions: live stream repeater, SHOUTcast/IceCast re-streaming or RTSP/RTP re-streaming. These types of alias are generally used to turn complex url based stream names into simple names. For example, if you're re-streaming a SHOUTcast stream that is hosted at the URL http://192.168.1.7/myradiostation then you can create a stream alias such as myradiostation. You can then use this alias name to refer to the SHOUTcast stream. With resolveStreamAlias methods, if a match is found for the stream name, it's transformed. If no match is found, publishing is blocked.

In multi-bitrate streaming, the SMIL file is resolved first then each item in the SMIL is resolved.

Notes:

• You can't use this interface in the same application with the StreamNameAlias AddOn, and you can't use .stream files if you're using this interface.
• Aliasing only changes a stream name. You can't use aliasing to change the IP address, domain name, or application name.

package com.wowza.wms.example.module;

import com.wowza.wms.application.*;
import com.wowza.wms.client.IClient;
import com.wowza.wms.httpstreamer.model.IHTTPStreamerSession;
import com.wowza.wms.mediacaster.IMediaCaster;
import com.wowza.wms.module.*;
import com.wowza.wms.rtp.model.RTPSession;
import com.wowza.wms.stream.IMediaStream;
import com.wowza.wms.stream.IMediaStreamNameAliasProvider3;
import com.wowza.wms.stream.livepacketizer.ILiveStreamPacketizer;

public class ModuleStreamNameAliasExample extends ModuleBase implements IMediaStreamNameAliasProvider3 {

	public void onAppStart(IApplicationInstance appInstance) {
		String fullname = appInstance.getApplication().getName() + "/"
				+ appInstance.getName();
		getLogger().info("onAppStart: " + fullname);

		appInstance.setStreamNameAliasProvider(this);
	}

	public String resolvePlayAlias(IApplicationInstance appInstance,
			String name, IClient client) {
		getLogger().info("Resolve Play Flash: " + name);
		return name;
	}

	public String resolvePlayAlias(IApplicationInstance appInstance,
			String name, IHTTPStreamerSession httpSession) {
		getLogger().info("Resolve Play HTTPSession: " + name);
		return name;
	}

	public String resolvePlayAlias(IApplicationInstance appInstance,
			String name, RTPSession rtpSession) {
		getLogger().info("Resolve Play RTPSession: " + name);
		return name;
	}

	public String resolvePlayAlias(IApplicationInstance appInstance,
			String name, ILiveStreamPacketizer liveStreamPacketizer) {
		getLogger().info("Resolve Play LiveStreamPacketizer: " + name);
		return name;
	}

	public String resolveStreamAlias(IApplicationInstance appInstance,
			String name, IMediaCaster mediaCaster) {
		getLogger().info("Resolve Stream Mediacaster: " + name);
		return name;
	}

	public String resolvePlayAlias(IApplicationInstance appInstance, String name) {
		getLogger().info("Resolve Play: " + name);
		return name;
	}

	public String resolveStreamAlias(IApplicationInstance appInstance,
			String name) {
		getLogger().info("Resolve Stream: " + name);
		return name;
	}
    
       public String resolvePlayAlias(IApplicationInstance appInstance, 
            String name, WebRTCSession webrtcSession) {
               getLogger().info("Resolve Play: " + name);
               return name;
       }

       public String resolveStreamAlias(IApplicationInstance appInstance, 
            String name, WebRTCSession webrtcSession) {
              getLogger().info("Resolve Stream: " + name);
              return name;
       }

       public String resolvePlayAlias(IApplicationInstance appInstance, 
            String name, IWebSocketSession webSocket) {
              getLogger().info("Resolve Play: " + name);
              return name;
       }

       public String resolveStreamAlias(IApplicationInstance appInstance, 
            String name, IWebSocketSession webSocket) {
              getLogger().info("Resolve Stream: " + name);
              return name;
       }
}

Add the following module last in the <Modules> list in /conf/[app-name]/Application.xml:

<Module>
	<Name>ModuleStreamNameAliasExample</Name>
	<Description>ModuleStreamNameAliasExample</Description>
	<Class>com.wowza.wms.example.module.ModuleStreamNameAliasExample</Class>
</Module>