[rules-users] compiled processes in PKG removed by knowledge agent after first change scan

[Jiang Zhu]

hi,

I'm having trouble with scanning changed knowledge from Guvnor. I found out
that compiled processes from Guvnor are missing after resource change
scanner scan for changes first time (event there is no changes).

I wrote a simple test to reproduce this.

public class KnowledgeAgentTest {

	@Test
	public void should_load_processes() throws Exception {
		ResourceChangeScannerConfiguration sconf =
ResourceFactory.getResourceChangeScannerService().newResourceChangeScannerConfiguration();
		// Scan change every 2 seconds
		KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent("agent");
		// Changeset points to a PKG contains 12 processes on Guvnor
	
kagent.applyChangeSet(ResourceFactory.newClassPathResource("test/drools-changeset.xml"));
		// Everything is still ok now
		System.out.println("Processes before scan: " +
kagent.getKnowledgeBase().getProcesses().size());
		Assert.assertFalse(kagent.getKnowledgeBase().getProcesses().isEmpty());
		// Scan change every 2 seconds
		sconf.setProperty("drools.resource.scanner.interval", "2");
		ResourceFactory.getResourceChangeScannerService().configure(sconf);
		ResourceFactory.getResourceChangeScannerService().start();
		ResourceFactory.getResourceChangeNotifierService().start();
		// Wait long enough
		Thread.sleep(5000);
		// Processes are gone somehow
		System.out.println("Processes after scan: " +
kagent.getKnowledgeBase().getProcesses().size());
		Assert.assertFalse(kagent.getKnowledgeBase().getProcesses().isEmpty());
	}

}

Here is what I'm getting when run the test.
-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running test.KnowledgeAgentTest
Processes before scan: 12
Processes after scan: 0
Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 5.802 sec
<<< FAILURE!

Results :

Failed tests:   should_load_processes(test.KnowledgeAgentTest)

Tests run: 1, Failures: 1, Errors: 0, Skipped: 0


Thanks,
Jiang

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