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https://issues.apache.org/jira/browse/ISIS-1215?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dan Haywood resolved ISIS-1215.
-------------------------------
Resolution: Fixed
> New MultipleExecutionStrategy for fixture scripts to use value semantics for
> determining whether to run a fixture script invoked more than once.
> ------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: ISIS-1215
> URL: https://issues.apache.org/jira/browse/ISIS-1215
> Project: Isis
> Issue Type: New Feature
> Components: Core
> Affects Versions: 1.9.0
> Reporter: Dan Haywood
> Assignee: Dan Haywood
> Priority: Minor
> Fix For: 1.10.0
>
>
> for fixture scripts, we can currently configure the MultipleExecutionStrategy
> as either IGNORE or EXECUTE, eg:
> {code:java}
> @Override
> public FixtureScriptsSpecification getSpecification() {
> return FixtureScriptsSpecification
> .builder(DomainAppFixtureScriptsSpecificationProvider.class)
> .with(FixtureScripts.MultipleExecutionStrategy.EXECUTE)
> .build();
> }
> {code}
> The IGNORE is for using fixture scripts that combine both the "WHAT" and the
> "HOW" (a la Estatio):
> {code:java}
> ec.executeChild(this, new ImportEventsFromSpreadsheet());
> ec.executeChild(this, new ImportPeopleFromSpreadsheet());
> {code}
> where:
> {code:java}
> static class ImportEventsFromSpreadsheet extends
> CreateUsingSpreadsheet<EventImport> {
> public ImportEventsFromSpreadsheet() {
> super(EventImport.class, "EventImport.xls");
> }
> }
> static class ImportPeopleFromSpreadsheet extends
> CreateUsingSpreadsheet<PeopleImport> {
> public ImportPeopleFromSpreadsheet() {
> super(PeopleImport.class, "PeopleImportB.xls");
> }
> }
> {code}
> The alternative is EXECUTE, which basically switches this behaviour off. That
> is appropriate for general purpose fixture scripts which take care of the
> "HOW", but where the "WHAT" is parameterized,
> eg:
> {code:java}
> ec.executeChild(this, new CreateUsingSpreadsheet<>(EventImport.class,
> "EventImport.xls"));
> ec.executeChild(this, new CreateUsingSpreadsheet<>(PeopleImport.class,
> "PeopleImportB.xls"));
> {code}
> This ticket is to combine both approaches by using value-semantics rather
> than reference semantics, thus to ignore fixture scripts if invoked multiple
> times where "multiple times" is determine by invoking on equals(...) of the
> fixture script against all previously invoked fixture scripts.
> thus, we would skip a fixture script if
> {code:java}
> ec.executeChild(this, new CreateUsingSpreadsheet<>(EventImport.class,
> "EventImport.xls"));
> // would invoke this:
> ec.executeChild(this, new
> CreateUsingSpreadsheet<>(SomethingElseImport.class,
> "SomethingElseImport.xls"));
> // but would skip this:
> ec.executeChild(this, new CreateUsingSpreadsheet<>(EventImport.class,
> "EventImport.xls"));
> {code}
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