Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.

Step 5: Test the PushTopic Channel

To load the Visualforce page in a web browser, click Preview on the Visualforce page editor:
In the text box, enter the channel name: /topic/InvoiceStatementUpdates.
To subscribe to the channel, click Subscribe.

Create or modify an invoice statement in a different browser tab. The page displays some debug messages and event notifications. The output resembles the following:

1DEBUG: Handshake Successful: {
2  "ext":{"replay":true,"payload.format":true},
3  "minimumVersion":"1.0",
4  "clientId":"41kdiuvgig2tfxdh9weakuiwyh",
5  "supportedConnectionTypes":["long-polling"],
6  "channel":"/meta/handshake",
7  "id":"1","version":"1.0","successful":true,"reestablish":false} 
8
9DEBUG: Connection Successful : {
10  "clientId":"41kdiuvgig2tfxdh9weakuiwyh",
11  "advice":{
12    "interval":2000,"multiple-clients":true,"reconnect":"retry",
13    "timeout":110000},"channel":"/meta/connect","id":"2",
14    "successful":true}
15
16DEBUG: Subscribe Successful /topic/InvoiceStatementUpdates: 
17{"clientId":"41kdiuvgig2tfxdh9weakuiwyh","channel":"/meta/subscribe",
18 "id":"15","subscription":"/topic/InvoiceStatementUpdates","successful":true} 
19
20
21{ 
22  "event": {
23    "createdDate": "2017-05-16T23:05:50.173Z", 
24    "replayId": 1, 
25    "type": "created" 
26  }, 
27  "sobject": { 
28    "Description__c": "New invoice.", 
29    "Id": "a00D0000009YbwQIAS", 
30    "Status__c": "Open", 
31    "Name": "INV-0001" 
32  } 
33}
34_____________ 
35
36{ 
37  "event": { 
38    "createdDate": "2017-05-16T23:06:11.529Z", 
39    "replayId": 2, 
40    "type": "updated" 
41  }, 
42  "sobject": { 
43    "Description__c": "New invoice.", 
44    "Id": "a00D0000009YbwQIAS", 
45    "Status__c": "Negotiating", 
46    "Name": "INV-0001" 
47  } 
48}
49_____________

The debug messages contain information about the subscription status. The first event notification shows the notification data when an invoice statement is created. The second notification shows the notification data when an invoice statement is updated.

Click Unsubscribe to unsubscribe from the channel and stop receiving notifications.

Streaming API Developer Guide

Step 5: Test the PushTopic Channel