Hi there Andrei.
#1: Clients and Servers cannot coexist within the same JVM. What has
been done for testing within Geode, is that we use the concept of a VM
<https://github.com/apache/geode/blob/develop/geode-core/src/test/java/org/apache/geode/test/dunit/VM.java>.
Which allows us to start multiple servers/clients in the same JVM. You
can review the JUnit4BasicDUnitTest
<https://github.com/apache/geode/blob/develop/geode-core/src/test/java/org/apache/geode/test/dunit/tests/JUnit4BasicDUnitTest.java>
to get an idea how we use it.
#2: Correct. CQ's is a client-side concept. If you want similar
behavior, you could try writing a custom CacheListener (or
AsyncEventListener for a more batch oriented approach) if you need to
trigger something on the server-side.
#3: We do have a Java API that you could use to create Regions. Geode
JavaDoc <http://geode.apache.org/releases/latest/javadoc/index.html>.
You could also look at the Geode in 5min
<https://cwiki.apache.org/confluence/display/GEODE/Index#Index-Geodein5minutesGeodein5minutes>,
as the Java API creates a region on the Client. If you were to use that
approach on the Server you would use Server Region Factory
<http://geode.apache.org/releases/latest/javadoc/org/apache/geode/cache/Cache.html#createRegionFactory-->
to create a region (in Java code) on the server. If you needed to
trigger this from a client, you could always use a Function
<http://geode.apache.org/docs/guide/developing/function_exec/chapter_overview.html>
that could create a Region on the server. Once, the regions are create
on the server(s) those regions will be usable for queries and cq's.
--Udo
On 12/8/16 10:28, Andrei Sereda wrote:
Hello,
I'm trying to bootstrap my application with prefabricated geode
(gemfire) cache for simple tests.
Basically what is necessary is to create a couple of regions, populate
them and run some queries (including CQ) on the top of existing
data, perhaps also validate transaction functionality.
Ideally one should be able to re-create regions (recycle
cache) multiple times. This also, has to run independently (no
external process dependencies) as part of existing build
I can't find an easy way to do so for the following reasons (please
correct me if I'm wrong) :
1) Client and Server caches can't coexists on the same JVM. Does it
mean one has to start a separate process for server ?
2) It seems that CQs can't be executed on server cache.
3) No easy way to create (non-local) regions programmatically on a
remote server cache (see (1)). They should be visible for queries /
CQs. Preferably avoiding starting a locator (another process) ?
Please point me to some examples if they exist.
Current version of product is gemfire v7 but looking at the code of
geode concepts remained the same.
Thanks,
Andrei.
