public ArtifactData getCandidateAsync(String arg) throws Exception {
reporter.trace("coordinate %s", arg);
if (isUrl(arg))
try {
ArtifactData data = putAsync(new URI(arg));
data.local = true;
return data;
} catch (Exception e) {
reporter.trace("hmm, not a valid url %s, will try the server", arg);
}
Coordinate c = new Coordinate(arg);
if (c.isSha()) {
ArtifactData r = get(c.getSha());
if (r != null) return r;
}
Revision revision = library.getRevisionByCoordinate(c);
if (revision == null) return null;
reporter.trace("revision %s", Hex.toHexString(revision._id));
ArtifactData ad = get(revision._id);
if (ad != null) {
reporter.trace("found in cache");
return ad;
}
URI url = revision.urls.iterator().next();
ArtifactData artifactData = putAsync(url);
artifactData.coordinate = c;
return artifactData;
}
/**
* Tests the behavior of Zookeeper upon a restart. ZK should clean up old coordinates.
*
* @throws Exception
*/
@Test
public void testZookeeperRestarts() throws Exception {
final CountDownLatch connectedLatch1 = new CountDownLatch(1);
final CountDownLatch connectedLatch2 = new CountDownLatch(3);
TestCoordinateListener listener = setUpListenerEnvironment(connectedLatch1, connectedLatch2);
assertTrue(connectedLatch1.await(20, TimeUnit.SECONDS));
log.info("Killing zookeeper");
forwarder.terminate();
ezk.shutdown();
ezk.del();
ezk.init();
Thread.sleep(2000);
forwarder = new PortForwarder(forwarderPort, "127.0.0.1", zkport);
int timeoutSecs = 30;
while (--timeoutSecs > 0) {
Thread.sleep(1000);
}
Coordinate c = Coordinate.parse("1.service.user.cell");
cn.createCoordinate(c);
Thread.sleep(9000);
assertEquals(
listener.events.get(listener.events.size() - 1), CoordinateListener.Event.COORDINATE_OK);
}
private TestCoordinateListener setUpListenerEnvironment(
CountDownLatch connectedLatch1, CountDownLatch connectedLatch2) throws Exception {
forwarderPort = Net.getFreePort();
forwarder = new PortForwarder(forwarderPort, "127.0.0.1", zkport);
final Coordinate c = Coordinate.parse("1.service.user.cell");
cn = makeLocalZkCloudname(forwarderPort);
try {
cn.createCoordinate(c);
} catch (CoordinateException e) {
fail(e.toString());
}
final TestCoordinateListener listener =
new TestCoordinateListener(connectedLatch1, connectedLatch2);
ServiceHandle serviceHandle = cn.claim(c);
serviceHandle.registerCoordinateListener(listener);
return listener;
}
/**
* Tests that one process claims a coordinate, then another process tries to claim the same
* coordinate. The first coordinate looses connection to ZooKeeper and the other process gets the
* coordinate.
*
* @throws Exception
*/
@Test
public void testFastHardRestart() throws Exception {
final Coordinate c = Coordinate.parse("1.service.user.cell");
final CountDownLatch claimLatch1 = new CountDownLatch(1);
forwarderPort = Net.getFreePort();
forwarder = new PortForwarder(forwarderPort, "127.0.0.1", zkport);
Cloudname cn1 =
new ZkCloudname.Builder().setConnectString("localhost:" + forwarderPort).build().connect();
cn1.createCoordinate(c);
ServiceHandle handle1 = cn1.claim(c);
handle1.registerCoordinateListener(
new CoordinateListener() {
@Override
public void onCoordinateEvent(Event event, String message) {
if (event == Event.COORDINATE_OK) {
claimLatch1.countDown();
}
}
});
assertTrue(claimLatch1.await(5, TimeUnit.SECONDS));
Cloudname cn2 =
new ZkCloudname.Builder().setConnectString("localhost:" + zkport).build().connect();
ServiceHandle handle2 = cn2.claim(c);
forwarder.terminate();
assertTrue(handle2.waitForCoordinateOkSeconds(20));
ServiceStatus status = new ServiceStatus(ServiceState.RUNNING, "updated status");
handle2.setStatus(status);
Cloudname cn3 =
new ZkCloudname.Builder().setConnectString("localhost:" + zkport).build().connect();
ServiceStatus statusRetrieved = cn3.getStatus(c);
assertEquals("updated status", statusRetrieved.getMessage());
}