Understanding implicit context loading
The implicit context load method as described in the recipe Using implicit context load to load contexts in Chapter 6, Managing Context Variables.
Pros
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.
Cons
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 context variables that are only used locally within the job and will fail if the local job variables are not present in the external file. Thus we have a choice; we can add single use variables to our shared context, potentially making it very messy...
