Using a JSON File to Override App Property Values

To override an app prop using a JSON file:

Procedure

1. In the JSON file, make sure that the app property which you want to override is set as follows:
   "<property>":"<value>"
   For example:

   {
   "IntegerOverrideVal":453,
   "StringOverridingValue":"hello",
   "BoolValue":true
   }
   

   Note: Only for certificates, the format of the property must be: 
   "<property>":"<encoded_value>"
   To get the encoded value of the contents, you can use https://www.base64encode.org/ or any other base64 encoding tool.
   
2. Execute the binary of the app using the FLOGO_APP_PROPS_JSON environment variable as follows:
   FLOGO_APP_PROPS_JSON=/<filepath>/<JSON filename>.json ./<binary>
   

Example: Overriding a Certificate Using a JSON File

You can override a server key and certificate using an app property. You would, typically, need to override a certificate if the existing certificate has expired or you want to use a custom certificate. You can directly override the certificate at runtime instead of re-configuring the app. In such a case:

Procedure
1. In the JSON file, set the ServerKey and ServerCertificate app properties as follows: 

{

"ServerKey":"LS0tLS1CRUdJTiBQUklWQVRFIEtFWS0tLS0tCk1JSUV2Z0l",

"ServerCertificate":"LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1J",

}

2. Execute the binary of the app using the FLOGO_APP_PROPS_JSON environment variable as follows:
   FLOGO_APP_PROPS_JSON=/home/john/Downloads/appPropOverride.json ./RestSSLService-linux_amd64