Yet Another Salesforce Tech Blog

Named credentials based on environment

The named credential contain the URL of the callout endpoint and usually you would want to use different endpoints and authentication for sandboxes and production

A simple and easy way to make the named credentials more dynamic is to create named credentials for each environment and name them accordingly, for example appended with _DEV or _QA. If these named credentials are all in the production org then they will be copied automatically to the refreshed sandboxes with the correct credentials.

public static final String NAMED_CREDENTIAL = 'callout:namedCredentialName';
	private static String sandboxNamespace {
		get {
			if (sandboxNamespace == null) {
				if (!SystemUtils.isSandboxInstance()) {
					sandboxNamespace = '';
				} else {
					if (MetadataUtils.getSandboxType() != 'qa') {
						sandboxNamespace = '_DEV';
					} else {
						sandboxNamespace = '_QA';
					}
				}
			}
			return sandboxNamespace;
		}
		set;
	}

    @TestVisible
	private static String getNamedCredentialEndpoint(String endpointName) {
		return NAMED_CREDENTIAL + sandboxNamespace + endpointName;
	}
}

The getNameCredentialEndpoint method can then be used in Apex to fetch the endpoint dynamically when setting up the HTTP callout 

req.setEndpoint(getNameCredentialEndpoint('endpoint');
Jani Ruohomaa
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