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View Page HistoryA placeholder is a specific value that is resolved at runtime against a property available in the property file set at component level. It is mainly used in the service unit JBI descriptor to be able to configure your service providers and/or your service consumers.
{code:xml}
<service-unit-parameter>${dgfip.quotient-familial.base-url}</service-unit-parameter>
{code}
<service-unit-parameter>${dgfip.quotient-familial.base-url}</service-unit-parameter>
{code}
Its syntax is: '{{$\{placeholder-name\[:default-value\]}\}}',
...
* if no property with name '{{placeholder-name}}' exists in the component property file, the default value '{{default-value}}' is used. If no default value is defined, the literal value '{{$\{placeholder-name}\}}' is used, It is possible to change a placeholder value at runtime reloading the component property file. It is not sufficient, the parameter associated to the placeholder must be changeable at runtime. So check component documentation to know that.
Example of using a placeholder in a REST service provider to define the URL of the external web-service: