CHAPTER 12 Force.com Canvas Limits
Because Force.com Canvas runs in a multitenant environment, limits are enforced to ensure protection of shared resources.
Description
Number of canvas apps per user that can be displayed on the
Chatter tab. Only the first 50 canvas apps are displayed (sorted alphabetically).
Number of Force.com Canvas calls per day per user (24–hour period)
Limit
50
Heroku Quick Start calls per day per user
5,000
This includes SDK calls to get context and signed request calls.
Note that when you call a SignedRequest method, there are actually two calls that are made—one call for the method and one call for internal logging.
100
Heroku accounts have their own limits on the number of calls you can make.
SEE ALSO:
Introducing Force.com Canvas
Quick Start
Quick Start—Advanced
105
INDEX
A apex:canvasApp component entityFields attribute
56
Returning fields in the Record object
56
Application object
92
Associating a CanvasLifecycleHandler with an app
80
Attributes object
97
Authentication
OAuth
35
refresh signed request
34
SAML SSO
39
signed request
27 ,
34
B
Browsers supported
3
C
Canvas app process overview
5
Canvas app user flow
OAuth
36
signed request
29
canvas apps
75
Canvas apps events
45
in a mobile card
61
in a page layout
61
in Chatter feed
69
in the publisher
64
listening for Streaming API events
48
resizing
41 ,
57
Visualforce
57
Visualforce pages
51
where they appear in the user interface
2
where they can appear in a page layout
62
Canvas apps in Salesforce app set the location
73
Canvas apps in the publisher create the action manually
65
set the location and create the action
65
canvas personal apps administration of
8
distribution of
7
enabling in an organization
8
how users install
7
106 canvas personal apps (continued) revoking token for
9
uninstalling
9
Canvas Personal Apps about
7
creating
8
CanvasLifecycleHandler
Associating a CanvasLifecycleHandler with an app
80
Controlling canvas app behavior
81
Creating a new CanvasLifecycleHandler
80
Distributing your CanvasLifecycleHandler class
84
Filtering CanvasRequest context data
81
onRender()
81
Presenting user error messages
82
Testing your CanvasLifecycleHandler implementation
83
CanvasRequest object
86
CanvasRequest object
86
Chatter feed canvas apps in
69
Chatter Feed canvas app access considerations when exposing a canvas app in the feed
70
context considerations when exposing a canvas app in the feed
70
Client object
89
Code examples events, creating an event
46
events, subscribing to an event
47
events, unsubscribing from an event
48
exposing canvas app on a Visualforce page
52
getting context
39
OAuth flow
38
publishing a canvas app in Visualforce by calling publish
58
resizing, automatically resizing a canvas app by calling autogrow
42
resizing, explicitly resizing a canvas app by calling resize
42
resizing, explicitly resizing a canvas app in a Visualforce page by calling resize
59
resizing, getting the size of a canvas app by calling size
43
resizing, handling orientation changes by subscribing to the orientation event
44
resizing, subscribing to events by calling subscribe
59
resizing, subscribing to parent events by calling subscribe
44
Index
Code examples (continued) resizing, unsubscribing from events by calling unsubscribe
60
Streaming API, creating a Streaming API event
49
Streaming API, subscribing to a Streaming API event by calling subscribe
49
Streaming API, unsubscribing from a Streaming API event by calling unsubscribe
50
verifying and decoding a signed request
30
XHR, getting a list of Chatter users
40
XHR, posting to a Chatter feed
41
Context
Application object
92
Attributes object
97
Client object
89
Dimensions object
95
Environment object
93
getting from canvas app
39
Links object
99
object
90
Organization object
101
Parameters object
98
Record object
96
Record object examples
97
User object
102
Version object
99
Context object
90
Controller
104
Controlling canvas app behavior
81
Creating a new CanvasLifecycleHandler
80
Cross-domain XHR
40
Customizing app lifecycle
Associating a CanvasLifecycleHandler with an app
80
Controlling canvas app behavior
81
Filtering CanvasRequest context data
81
Presenting user error messages
82
D
Debug
50
Dimensions object
95
Distributing your CanvasLifecycleHandler class
84
E
Editions supported
3
Environment object
93
Events considerations
45
creating, code example
46
subscribing to, code examples
47
Events (continued) unsubscribing from, code examples
48
Events code examples creating an event
46
subscribing to an event
47
unsubscribing from an event
48
F
Filtering CanvasRequest context data
81
Force.com Canvas scenarios
2
Force.com Canvas SDK hosted on Salesforce server
27
publisher events
66
I
Introduction to Force.com Canvas
1
L
Limits
105
Links object
99
M
Mobile card canvas apps, adding to
61
N navigation methods
75
O
OAuth initiating
38
OAuth authentication
35
Organization object
101
Orientation handling in your canvas app
44
P
Page layout add a canvas app
62
canvas apps, adding to
61
canvas apps, where they can appear
62
Parameters object
98
Presenting user error messages
82
Process for creating a canvas app
5
Publisher canvas app access considerations when exposing a canvas app in the publisher
68
canvas apps in
64
107
Index
Publisher (continued) context considerations when exposing a canvas app in the publisher
67
Publisher events
66
Publishing code examples publishing a canvas app in Visualforce by calling publish
58
Q
Quick start create the app
12
introduction
11
prerequisites
12
set the app location
13
Quick start—advanced clone the “hello world” project
16
configure who can access the canvas app
20
configure who can access the installed canvas app
25
create the canvas app
18
deploy the “hello world” Web app to Heroku
21
install the canvas app
24
introduction
15
package the canvas app
23
prerequisites
16
run the Web app locally
17
update the canvas app
22
upload the canvas app package
24
R
Record object
96
Record object examples
97
Resizing
41 ,
57
Resizing code examples automatically resizing a canvas app by calling autogrow
42
explicitly resizing a canvas app by calling resize
42
explicitly resizing a canvas app in a Visualforce page by calling resize
59
getting the size of a canvas app by calling size
43
subscribing to events by calling subscribe
59
subscribing to parent events by calling subscribe
44
subscribing to the orientation event
44
unsubscribing from events by calling unsubscribe
60
S
Salesforce app access considerations when exposing a canvas app in
Salesforce app
74
canvas apps in
72
context considerations when exposing a canvas app in
Salesforce app
73
Salesforce app (continued) icon considerations when exposing a canvas app in
Salesforce app
75
SAML SSO
39
SDK Objects
86
select tag in a canvas app
50
sfdc.streamingapi event
49
Signed request verifying and decoding
30
Signed request authentication
27
, 34
SignedRequest object
104
SignedRequest object
104
Streaming API
48
Streaming API code examples subscribing to a Streaming API event by calling subscribe
49
unsubscribing from a Streaming API event by calling unsubscribe
50
Streaming API event
49
Supported browsers
3
Supported Salesforce Editions
3
T
Testing your CanvasLifecycleHandler implementation
83
U
User interface considerations
4
User object
102
User permissions required
4
V
Version object
99
Visualforce apex:canvasApp component
53
apex:canvasApp component entityFields attribute
56
canvas app code examples
52
canvas apps, exposing
51
considerations when exposing a canvas app
53
W
Where canvas apps appear
2
X
XHR
40
XHR code example getting a list of Chatter users
40
posting to a Chatter feed
41
108
