The implicit context load method as described in the recipe Using implicit context load to load contexts in Chapter 6, Managing Context Variables.
The implicit context load technique is centrally managed, thus ensuring consistent use across a project. Developers do not need to remember to set context variables, because they will be set automatically.
The use of external files is good practice for managing contexts, as they are less likely to be overwritten during deployment.
This method provides the option to fail if a context variable is not present or does not contain data, which is great for validating your parameters. Unfortunately this option checks against the whole context of a job, including ...