public void testHosts() throws Exception {
ZkRing ring = ZkRing.create(getZk(), coordinator, ring_group_root, 1, null, 1);
assertEquals(0, ring.getHosts().size());
Host host = ring.addHost(LOCALHOST);
assertEquals(LOCALHOST, host.getAddress());
for (int i = 0; i < 20; i++) {
if (!ring.getHosts().isEmpty()) {
break;
}
Thread.sleep(100);
}
assertEquals(Collections.singleton(host), ring.getHosts());
assertEquals(LOCALHOST, ring.getHostByAddress(LOCALHOST).getAddress());
ring.close();
// assure that hosts reload well, too
ring = new ZkRing(getZk(), ring_root, null, coordinator);
assertEquals(1, ring.getHosts().size());
assertEquals(Collections.singleton(host), ring.getHosts());
assertEquals(LOCALHOST, ring.getHostByAddress(LOCALHOST).getAddress());
assertTrue(ring.removeHost(LOCALHOST));
assertNull(ring.getHostByAddress(LOCALHOST));
assertFalse(ring.removeHost(LOCALHOST));
ring.close();
}
public void testLoad() throws Exception {
ZkRing ring = ZkRing.create(getZk(), coordinator, ring_group_root, 1, null, 1);
ring.close();
ring = new ZkRing(getZk(), ZkPath.append(ring_group_root, "ring-1"), null, coordinator);
assertEquals("ring number", 1, ring.getRingNumber());
assertNull("version number", ring.getCurrentVersionNumber());
assertEquals("updating to version", Integer.valueOf(1), ring.getUpdatingToVersionNumber());
assertEquals("number of hosts", 0, ring.getHosts().size());
assertEquals("initial state", RingState.CLOSED, ring.getState());
ring.close();
}
public void testUpdatingSemantics() throws Exception {
ZkRing ring = ZkRing.create(getZk(), coordinator, ring_group_root, 1, null, 1);
assertTrue("should be updating", Rings.isUpdatePending(ring));
assertNull("current version", ring.getCurrentVersionNumber());
assertEquals(
"updating_to_version number", Integer.valueOf(1), ring.getUpdatingToVersionNumber());
ring.markUpdateComplete();
assertFalse("updating", Rings.isUpdatePending(ring));
assertEquals("current version", Integer.valueOf(1), ring.getCurrentVersionNumber());
assertNull("updating to version", ring.getUpdatingToVersionNumber());
ring.setUpdatingToVersion(7);
assertTrue("should be updating", Rings.isUpdatePending(ring));
assertEquals("current version", Integer.valueOf(1), ring.getCurrentVersionNumber());
assertEquals(
"updating_to_version number", Integer.valueOf(7), ring.getUpdatingToVersionNumber());
ring.close();
}