Kirk Lund created GEODE-5644:
--------------------------------

             Summary: New DistributedReference JUnit rule for DistributedTests
                 Key: GEODE-5644
                 URL: https://issues.apache.org/jira/browse/GEODE-5644
             Project: Geode
          Issue Type: Wish
          Components: tests
            Reporter: Kirk Lund


I'd like to add a new DistributedReference JUnit rule for DistributedTests 
which would be used similar to an AtomicReference but with a reference that is 
useable within every DUnit VM.

The idea is that this would allow us to define something like:

{noformat}
@Rule
public DistributedReference<Cache> cacheReference = new 
DistributedReference<>();

@Before
public void setUp() {
  getVM(0).invoke(() -> cacheReference.set(new CacheFactory().create());
}

@After
public void tearDown() {
  getVM(0).invoke(() -> cacheReference.get().close());
}
{noformat}

And then use the Geode APIs directly within the test without relying on any 
custom rules like CacheRule or ClusterStarterRule. This would make tests that 
use it more directly dependent on the User APIs and force us to become more 
aware of of the shortcomings of that API. If the Geode User API for creating 
and closing Cache is so difficult or verbose to use, then this will encourage 
us to fix the Geode User API instead of hiding it behind complex JUnit rules.

We could also consider adding support for java.io.Closeable since resources 
such as Cache implement Closeable.




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