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How do I test a web service callout in Salesforce?
When you create an Apex class from a WSDL, the methods in the auto-generated class call WebServiceCallout. invoke , which performs the callout to the external service. When testing these methods, you can instruct the Apex runtime to generate a fake response whenever WebServiceCallout. invoke is called.
How many callouts are in a single Apex transaction?
Continuation-Specific Limits
| Description | Limit |
|---|---|
| Maximum number of parallel Apex callouts in a single continuation | 3 |
| Maximum number of chained Apex callouts | 3 |
| Maximum timeout for a single continuation 1 | 120 seconds |
| Maximum Visualforce controller-state size 2 | 80 KB |
Is there a limit to the number of callouts?
A custom timeout can be defined for each callout. The minimum is 1 millisecond and the maximum is 120,000 milliseconds. See the examples in the next section for how to set custom timeouts for Web services or HTTP callouts.
How often does Salesforce Org go into read only mode?
Your Salesforce org is in read-only mode during some Salesforce maintenance activities, such as planned site switches and instance refreshes. As part of Continuous Site Switching, your Salesforce org is switched to its ready site approximately once every six months. For more information about site switching, see Continuous Site Switching.
How many callouts can be made in apex?
A single Apex transaction can make a maximum of 100 callouts to an HTTP request or an API call. The default timeout is 10 seconds. A custom timeout can be defined for each callout. The minimum is 1 millisecond and the maximum is 120,000 milliseconds.
What is the default timeout for Apex code?
The following limits and limitations apply when Apex code makes a callout to an HTTP request or a web services call. The web services call can be a SOAP API call or any external web services call. A single Apex transaction can make a maximum of 100 callouts to an HTTP request or an API call. The default timeout is 10 seconds.