This figure shows the Oracle CEP Visualizer stream visualizer. It contains a Pub/Sub Server URL field with value http://localhost:9002/pubsub, an Initialize Client field with value /playbackchannel, a Received Messages field, a Publish Channel field, a Publish Message field, and a Debug Messages area. There is an Initialize Client button next to the Pub/Sub Server URL field. There is a Subscribe, Unsubscribe, and Clean Text button next to the Subscribe Channel field. There is a Publish button next to the Publish Message field.