org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/RepositoryCacheTest.java - jgit - Git at Google

 /*
  * Copyright (C) 2009, Google Inc.
  * and other copyright owners as documented in the project's IP log.
  *
  * This program and the accompanying materials are made available
  * under the terms of the Eclipse Distribution License v1.0 which
  * accompanies this distribution, is reproduced below, and is
  * available at http://www.eclipse.org/org/documents/edl-v10.php
  *
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or
  * without modification, are permitted provided that the following
  * conditions are met:
  *
  * - Redistributions of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
  *
  * - Redistributions in binary form must reproduce the above
  *   copyright notice, this list of conditions and the following
  *   disclaimer in the documentation and/or other materials provided
  *   with the distribution.
  *
  * - Neither the name of the Eclipse Foundation, Inc. nor the
  *   names of its contributors may be used to endorse or promote
  *   products derived from this software without specific prior
  *   written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 package org.eclipse.jgit.lib;

 import static org.hamcrest.CoreMatchers.hasItem;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNotSame;
 import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;

 import java.io.File;
 import java.io.IOException;

 import org.eclipse.jgit.errors.RepositoryNotFoundException;
 import org.eclipse.jgit.junit.RepositoryTestCase;
 import org.eclipse.jgit.lib.RepositoryCache.FileKey;
 import org.junit.Test;

 public class RepositoryCacheTest extends RepositoryTestCase {
 	@Test
 	public void testNonBareFileKey() throws IOException {
 		File gitdir = db.getDirectory();
 		File parent = gitdir.getParentFile();
 		File other = new File(parent, "notagit");
 		assertEqualsFile(gitdir, FileKey.exact(gitdir, db.getFS()).getFile());
 		assertEqualsFile(parent, FileKey.exact(parent, db.getFS()).getFile());
 		assertEqualsFile(other, FileKey.exact(other, db.getFS()).getFile());

 		assertEqualsFile(gitdir, FileKey.lenient(gitdir, db.getFS()).getFile());
 		assertEqualsFile(gitdir, FileKey.lenient(parent, db.getFS()).getFile());
 		assertEqualsFile(other, FileKey.lenient(other, db.getFS()).getFile());
 	}

 	@Test
 	public void testBareFileKey() throws IOException {
 		Repository bare = createBareRepository();
 		File gitdir = bare.getDirectory();
 		File parent = gitdir.getParentFile();
 		String name = gitdir.getName();
 		assertTrue(name.endsWith(".git"));
 		name = name.substring(0, name.length() - 4);

 		assertEqualsFile(gitdir, FileKey.exact(gitdir, db.getFS()).getFile());

 		assertEqualsFile(gitdir, FileKey.lenient(gitdir, db.getFS()).getFile());
 		assertEqualsFile(gitdir,
 				FileKey.lenient(new File(parent, name), db.getFS()).getFile());
 	}

 	@Test
 	public void testFileKeyOpenExisting() throws IOException {
 		try (Repository r = new FileKey(db.getDirectory(), db.getFS())
 				.open(true)) {
 			assertNotNull(r);
 			assertEqualsFile(db.getDirectory(), r.getDirectory());
 		}

 		try (Repository r = new FileKey(db.getDirectory(), db.getFS())
 				.open(false)) {
 			assertNotNull(r);
 			assertEqualsFile(db.getDirectory(), r.getDirectory());
 		}
 	}

 	@Test
 	public void testFileKeyOpenNew() throws IOException {
 		File gitdir;
 		try (Repository n = createRepository(true)) {
 			gitdir = n.getDirectory();
 		}
 		recursiveDelete(gitdir);
 		assertFalse(gitdir.exists());

 		try {
 			new FileKey(gitdir, db.getFS()).open(true);
 			fail("incorrectly opened a non existant repository");
 		} catch (RepositoryNotFoundException e) {
 			assertEquals("repository not found: " + gitdir.getCanonicalPath(),
 					e.getMessage());
 		}

 		final Repository o = new FileKey(gitdir, db.getFS()).open(false);
 		assertNotNull(o);
 		assertEqualsFile(gitdir, o.getDirectory());
 		assertFalse(gitdir.exists());
 	}

 	@Test
 	public void testCacheRegisterOpen() throws Exception {
 		final File dir = db.getDirectory();
 		RepositoryCache.register(db);
 		assertSame(db, RepositoryCache.open(FileKey.exact(dir, db.getFS())));

 		assertEquals(".git", dir.getName());
 		final File parent = dir.getParentFile();
 		assertSame(db, RepositoryCache.open(FileKey.lenient(parent, db.getFS())));
 	}

 	@Test
 	public void testCacheOpen() throws Exception {
 		final FileKey loc = FileKey.exact(db.getDirectory(), db.getFS());
 		@SuppressWarnings("resource") // We are testing the close() method
 		final Repository d2 = RepositoryCache.open(loc);
 		assertNotSame(db, d2);
 		assertSame(d2, RepositoryCache.open(FileKey.exact(loc.getFile(), db.getFS())));
 		d2.close();
 		d2.close();
 	}

 	@Test
 	public void testGetRegisteredWhenEmpty() {
 		assertEquals(0, RepositoryCache.getRegisteredKeys().size());
 	}

 	@Test
 	public void testGetRegistered() {
 		RepositoryCache.register(db);

 		assertThat(RepositoryCache.getRegisteredKeys(),
 				hasItem(FileKey.exact(db.getDirectory(), db.getFS())));
 		assertEquals(1, RepositoryCache.getRegisteredKeys().size());
 	}

 	@Test
 	public void testUnregister() {
 		RepositoryCache.register(db);
 		RepositoryCache
 				.unregister(FileKey.exact(db.getDirectory(), db.getFS()));

 		assertEquals(0, RepositoryCache.getRegisteredKeys().size());
 	}

 	@Test
 	public void testRepositoryUsageCount() throws Exception {
 		FileKey loc = FileKey.exact(db.getDirectory(), db.getFS());
 		@SuppressWarnings("resource") // We are testing the close() method
 		Repository d2 = RepositoryCache.open(loc);
 		assertEquals(1, d2.useCnt.get());
 		RepositoryCache.open(FileKey.exact(loc.getFile(), db.getFS()));
 		assertEquals(2, d2.useCnt.get());
 		d2.close();
 		assertEquals(1, d2.useCnt.get());
 		d2.close();
 		assertEquals(0, d2.useCnt.get());
 	}

 	@Test
 	public void testRepositoryUsageCountWithRegisteredRepository()
 			throws IOException {
 		@SuppressWarnings({"resource", "deprecation"}) // We are testing the close() method
 		Repository repo = createRepository(false, false);
 		assertEquals(1, repo.useCnt.get());
 		RepositoryCache.register(repo);
 		assertEquals(1, repo.useCnt.get());
 		repo.close();
 		assertEquals(0, repo.useCnt.get());
 	}

 	@Test
 	public void testRepositoryNotUnregisteringWhenClosing() throws Exception {
 		FileKey loc = FileKey.exact(db.getDirectory(), db.getFS());
 		@SuppressWarnings("resource") // We are testing the close() method
 		Repository d2 = RepositoryCache.open(loc);
 		assertEquals(1, d2.useCnt.get());
 		assertThat(RepositoryCache.getRegisteredKeys(),
 				hasItem(FileKey.exact(db.getDirectory(), db.getFS())));
 		assertEquals(1, RepositoryCache.getRegisteredKeys().size());
 		d2.close();
 		assertEquals(0, d2.useCnt.get());
 		assertEquals(1, RepositoryCache.getRegisteredKeys().size());
 		assertTrue(RepositoryCache.isCached(d2));
 	}

 	@Test
 	public void testRepositoryUnregisteringWhenExpiredAndUsageCountNegative()
 			throws Exception {
 		@SuppressWarnings("resource") // We are testing the close() method
 		Repository repoA = createBareRepository();
 		RepositoryCache.register(repoA);

 		assertEquals(1, RepositoryCache.getRegisteredKeys().size());
 		assertTrue(RepositoryCache.isCached(repoA));

 		// close the repo twice to make usage count negative
 		repoA.close();
 		repoA.close();
 		// fake that repoA was closed more than 1 hour ago (default expiration
 		// time)
 		repoA.closedAt.set(System.currentTimeMillis() - 65 * 60 * 1000);

 		RepositoryCache.clearExpired();

 		assertEquals(0, RepositoryCache.getRegisteredKeys().size());
 	}

 	@Test
 	public void testRepositoryUnregisteringWhenExpired() throws Exception {
 		@SuppressWarnings({"resource", "deprecation"}) // We are testing the close() method
 		Repository repoA = createRepository(true, false);
 		@SuppressWarnings({"resource", "deprecation"}) // We are testing the close() method
 		Repository repoB = createRepository(true, false);
 		Repository repoC = createBareRepository();
 		RepositoryCache.register(repoA);
 		RepositoryCache.register(repoB);
 		RepositoryCache.register(repoC);

 		assertEquals(3, RepositoryCache.getRegisteredKeys().size());
 		assertTrue(RepositoryCache.isCached(repoA));
 		assertTrue(RepositoryCache.isCached(repoB));
 		assertTrue(RepositoryCache.isCached(repoC));

 		// fake that repoA was closed more than 1 hour ago (default expiration
 		// time)
 		repoA.close();
 		repoA.closedAt.set(System.currentTimeMillis() - 65 * 60 * 1000);
 		// close repoB but this one will not be expired
 		repoB.close();

 		assertEquals(3, RepositoryCache.getRegisteredKeys().size());
 		assertTrue(RepositoryCache.isCached(repoA));
 		assertTrue(RepositoryCache.isCached(repoB));
 		assertTrue(RepositoryCache.isCached(repoC));

 		RepositoryCache.clearExpired();

 		assertEquals(2, RepositoryCache.getRegisteredKeys().size());
 		assertFalse(RepositoryCache.isCached(repoA));
 		assertTrue(RepositoryCache.isCached(repoB));
 		assertTrue(RepositoryCache.isCached(repoC));
 	}

 	@Test
 	public void testReconfigure() throws InterruptedException, IOException {
 		@SuppressWarnings({"resource", "deprecation"}) // We are testing the close() method
 		Repository repo = createRepository(false, false);
 		RepositoryCache.register(repo);
 		assertTrue(RepositoryCache.isCached(repo));
 		repo.close();
 		assertTrue(RepositoryCache.isCached(repo));

 		// Actually, we would only need to validate that
 		// WorkQueue.getExecutor().scheduleWithFixedDelay is called with proper
 		// values but since we do not have a mock library, we test
 		// reconfiguration from a black box perspective. I.e. reconfigure
 		// expireAfter and cleanupDelay to 1 ms and wait until the Repository
 		// is evicted to prove that reconfiguration worked.
 		RepositoryCacheConfig config = new RepositoryCacheConfig();
 		config.setExpireAfter(1);
 		config.setCleanupDelay(1);
 		config.install();

 		// Instead of using a fixed waiting time, start with small and increase:
 		// sleep 1, 2, 4, 8, 16, ..., 1024 ms
 		// This wait will time out after 2048 ms
 		for (int i = 0; i <= 10; i++) {
 			Thread.sleep(1 << i);
 			if (!RepositoryCache.isCached(repo)) {
 				return;
 			}
 		}
 		fail("Repository should have been evicted from cache");
 	}
 }
	/*
	* Copyright (C) 2009, Google Inc.
	* and other copyright owners as documented in the project's IP log.
	*
	* This program and the accompanying materials are made available
	* under the terms of the Eclipse Distribution License v1.0 which
	* accompanies this distribution, is reproduced below, and is
	* available at http://www.eclipse.org/org/documents/edl-v10.php
	*
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or
	* without modification, are permitted provided that the following
	* conditions are met:
	*
	* - Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	*
	* - Redistributions in binary form must reproduce the above
	* copyright notice, this list of conditions and the following
	* disclaimer in the documentation and/or other materials provided
	* with the distribution.
	*
	* - Neither the name of the Eclipse Foundation, Inc. nor the
	* names of its contributors may be used to endorse or promote
	* products derived from this software without specific prior
	* written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
	* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
	* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	package org.eclipse.jgit.lib;

	import static org.hamcrest.CoreMatchers.hasItem;
	import static org.junit.Assert.assertEquals;
	import static org.junit.Assert.assertFalse;
	import static org.junit.Assert.assertNotNull;
	import static org.junit.Assert.assertNotSame;
	import static org.junit.Assert.assertSame;
	import static org.junit.Assert.assertThat;
	import static org.junit.Assert.assertTrue;
	import static org.junit.Assert.fail;

	import java.io.File;
	import java.io.IOException;

	import org.eclipse.jgit.errors.RepositoryNotFoundException;
	import org.eclipse.jgit.junit.RepositoryTestCase;
	import org.eclipse.jgit.lib.RepositoryCache.FileKey;
	import org.junit.Test;

	public class RepositoryCacheTest extends RepositoryTestCase {
	@Test
	public void testNonBareFileKey() throws IOException {
	File gitdir = db.getDirectory();
	File parent = gitdir.getParentFile();
	File other = new File(parent, "notagit");
	assertEqualsFile(gitdir, FileKey.exact(gitdir, db.getFS()).getFile());
	assertEqualsFile(parent, FileKey.exact(parent, db.getFS()).getFile());
	assertEqualsFile(other, FileKey.exact(other, db.getFS()).getFile());

	assertEqualsFile(gitdir, FileKey.lenient(gitdir, db.getFS()).getFile());
	assertEqualsFile(gitdir, FileKey.lenient(parent, db.getFS()).getFile());
	assertEqualsFile(other, FileKey.lenient(other, db.getFS()).getFile());
	}

	@Test
	public void testBareFileKey() throws IOException {
	Repository bare = createBareRepository();
	File gitdir = bare.getDirectory();
	File parent = gitdir.getParentFile();
	String name = gitdir.getName();
	assertTrue(name.endsWith(".git"));
	name = name.substring(0, name.length() - 4);

	assertEqualsFile(gitdir, FileKey.exact(gitdir, db.getFS()).getFile());

	assertEqualsFile(gitdir, FileKey.lenient(gitdir, db.getFS()).getFile());
	assertEqualsFile(gitdir,
	FileKey.lenient(new File(parent, name), db.getFS()).getFile());
	}

	@Test
	public void testFileKeyOpenExisting() throws IOException {
	try (Repository r = new FileKey(db.getDirectory(), db.getFS())
	.open(true)) {
	assertNotNull(r);
	assertEqualsFile(db.getDirectory(), r.getDirectory());
	}

	try (Repository r = new FileKey(db.getDirectory(), db.getFS())
	.open(false)) {
	assertNotNull(r);
	assertEqualsFile(db.getDirectory(), r.getDirectory());
	}
	}

	@Test
	public void testFileKeyOpenNew() throws IOException {
	File gitdir;
	try (Repository n = createRepository(true)) {
	gitdir = n.getDirectory();
	}
	recursiveDelete(gitdir);
	assertFalse(gitdir.exists());

	try {
	new FileKey(gitdir, db.getFS()).open(true);
	fail("incorrectly opened a non existant repository");
	} catch (RepositoryNotFoundException e) {
	assertEquals("repository not found: " + gitdir.getCanonicalPath(),
	e.getMessage());
	}

	final Repository o = new FileKey(gitdir, db.getFS()).open(false);
	assertNotNull(o);
	assertEqualsFile(gitdir, o.getDirectory());
	assertFalse(gitdir.exists());
	}

	@Test
	public void testCacheRegisterOpen() throws Exception {
	final File dir = db.getDirectory();
	RepositoryCache.register(db);
	assertSame(db, RepositoryCache.open(FileKey.exact(dir, db.getFS())));

	assertEquals(".git", dir.getName());
	final File parent = dir.getParentFile();
	assertSame(db, RepositoryCache.open(FileKey.lenient(parent, db.getFS())));
	}

	@Test
	public void testCacheOpen() throws Exception {
	final FileKey loc = FileKey.exact(db.getDirectory(), db.getFS());
	@SuppressWarnings("resource") // We are testing the close() method
	final Repository d2 = RepositoryCache.open(loc);
	assertNotSame(db, d2);
	assertSame(d2, RepositoryCache.open(FileKey.exact(loc.getFile(), db.getFS())));
	d2.close();
	d2.close();
	}

	@Test
	public void testGetRegisteredWhenEmpty() {
	assertEquals(0, RepositoryCache.getRegisteredKeys().size());
	}

	@Test
	public void testGetRegistered() {
	RepositoryCache.register(db);

	assertThat(RepositoryCache.getRegisteredKeys(),
	hasItem(FileKey.exact(db.getDirectory(), db.getFS())));
	assertEquals(1, RepositoryCache.getRegisteredKeys().size());
	}

	@Test
	public void testUnregister() {
	RepositoryCache.register(db);
	RepositoryCache
	.unregister(FileKey.exact(db.getDirectory(), db.getFS()));

	assertEquals(0, RepositoryCache.getRegisteredKeys().size());
	}

	@Test
	public void testRepositoryUsageCount() throws Exception {
	FileKey loc = FileKey.exact(db.getDirectory(), db.getFS());
	@SuppressWarnings("resource") // We are testing the close() method
	Repository d2 = RepositoryCache.open(loc);
	assertEquals(1, d2.useCnt.get());
	RepositoryCache.open(FileKey.exact(loc.getFile(), db.getFS()));
	assertEquals(2, d2.useCnt.get());
	d2.close();
	assertEquals(1, d2.useCnt.get());
	d2.close();
	assertEquals(0, d2.useCnt.get());
	}

	@Test
	public void testRepositoryUsageCountWithRegisteredRepository()
	throws IOException {
	@SuppressWarnings({"resource", "deprecation"}) // We are testing the close() method
	Repository repo = createRepository(false, false);
	assertEquals(1, repo.useCnt.get());
	RepositoryCache.register(repo);
	assertEquals(1, repo.useCnt.get());
	repo.close();
	assertEquals(0, repo.useCnt.get());
	}

	@Test
	public void testRepositoryNotUnregisteringWhenClosing() throws Exception {
	FileKey loc = FileKey.exact(db.getDirectory(), db.getFS());
	@SuppressWarnings("resource") // We are testing the close() method
	Repository d2 = RepositoryCache.open(loc);
	assertEquals(1, d2.useCnt.get());
	assertThat(RepositoryCache.getRegisteredKeys(),
	hasItem(FileKey.exact(db.getDirectory(), db.getFS())));
	assertEquals(1, RepositoryCache.getRegisteredKeys().size());
	d2.close();
	assertEquals(0, d2.useCnt.get());
	assertEquals(1, RepositoryCache.getRegisteredKeys().size());
	assertTrue(RepositoryCache.isCached(d2));
	}

	@Test
	public void testRepositoryUnregisteringWhenExpiredAndUsageCountNegative()
	throws Exception {
	@SuppressWarnings("resource") // We are testing the close() method
	Repository repoA = createBareRepository();
	RepositoryCache.register(repoA);

	assertEquals(1, RepositoryCache.getRegisteredKeys().size());
	assertTrue(RepositoryCache.isCached(repoA));

	// close the repo twice to make usage count negative
	repoA.close();
	repoA.close();
	// fake that repoA was closed more than 1 hour ago (default expiration
	// time)
	repoA.closedAt.set(System.currentTimeMillis() - 65 * 60 * 1000);

	RepositoryCache.clearExpired();

	assertEquals(0, RepositoryCache.getRegisteredKeys().size());
	}

	@Test
	public void testRepositoryUnregisteringWhenExpired() throws Exception {
	@SuppressWarnings({"resource", "deprecation"}) // We are testing the close() method
	Repository repoA = createRepository(true, false);
	@SuppressWarnings({"resource", "deprecation"}) // We are testing the close() method
	Repository repoB = createRepository(true, false);
	Repository repoC = createBareRepository();
	RepositoryCache.register(repoA);
	RepositoryCache.register(repoB);
	RepositoryCache.register(repoC);

	assertEquals(3, RepositoryCache.getRegisteredKeys().size());
	assertTrue(RepositoryCache.isCached(repoA));
	assertTrue(RepositoryCache.isCached(repoB));
	assertTrue(RepositoryCache.isCached(repoC));

	// fake that repoA was closed more than 1 hour ago (default expiration
	// time)
	repoA.close();
	repoA.closedAt.set(System.currentTimeMillis() - 65 * 60 * 1000);
	// close repoB but this one will not be expired
	repoB.close();

	assertEquals(3, RepositoryCache.getRegisteredKeys().size());
	assertTrue(RepositoryCache.isCached(repoA));
	assertTrue(RepositoryCache.isCached(repoB));
	assertTrue(RepositoryCache.isCached(repoC));

	RepositoryCache.clearExpired();

	assertEquals(2, RepositoryCache.getRegisteredKeys().size());
	assertFalse(RepositoryCache.isCached(repoA));
	assertTrue(RepositoryCache.isCached(repoB));
	assertTrue(RepositoryCache.isCached(repoC));
	}

	@Test
	public void testReconfigure() throws InterruptedException, IOException {
	@SuppressWarnings({"resource", "deprecation"}) // We are testing the close() method
	Repository repo = createRepository(false, false);
	RepositoryCache.register(repo);
	assertTrue(RepositoryCache.isCached(repo));
	repo.close();
	assertTrue(RepositoryCache.isCached(repo));

	// Actually, we would only need to validate that
	// WorkQueue.getExecutor().scheduleWithFixedDelay is called with proper
	// values but since we do not have a mock library, we test
	// reconfiguration from a black box perspective. I.e. reconfigure
	// expireAfter and cleanupDelay to 1 ms and wait until the Repository
	// is evicted to prove that reconfiguration worked.
	RepositoryCacheConfig config = new RepositoryCacheConfig();
	config.setExpireAfter(1);
	config.setCleanupDelay(1);
	config.install();

	// Instead of using a fixed waiting time, start with small and increase:
	// sleep 1, 2, 4, 8, 16, ..., 1024 ms
	// This wait will time out after 2048 ms
	for (int i = 0; i <= 10; i++) {
	Thread.sleep(1 << i);
	if (!RepositoryCache.isCached(repo)) {
	return;
	}
	}
	fail("Repository should have been evicted from cache");
	}
	}