Java tutorial
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See the License for the * specific language governing permissions and limitations * under the License. */ package org.apache.curator.x.async; import org.apache.curator.framework.CuratorFramework; import org.apache.curator.framework.CuratorFrameworkFactory; import org.apache.curator.framework.api.transaction.CuratorOp; import org.apache.curator.retry.RetryOneTime; import org.apache.curator.utils.CloseableUtils; import org.apache.zookeeper.KeeperException; import org.apache.zookeeper.Watcher; import org.apache.zookeeper.data.Stat; import org.testng.Assert; import org.testng.annotations.AfterMethod; import org.testng.annotations.BeforeMethod; import org.testng.annotations.Test; import java.io.IOException; import java.util.Arrays; import java.util.concurrent.CompletionStage; import java.util.concurrent.CountDownLatch; import static java.util.EnumSet.of; import static org.apache.curator.x.async.api.CreateOption.compress; import static org.apache.curator.x.async.api.CreateOption.setDataIfExists; import static org.apache.zookeeper.CreateMode.EPHEMERAL_SEQUENTIAL; import static org.apache.zookeeper.CreateMode.PERSISTENT_SEQUENTIAL; public class TestBasicOperations extends CompletableBaseClassForTests { private AsyncCuratorFramework client; @BeforeMethod @Override public void setup() throws Exception { super.setup(); CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(timing.forSleepingABit().milliseconds())); client.start(); this.client = AsyncCuratorFramework.wrap(client); } @AfterMethod @Override public void teardown() throws Exception { CloseableUtils.closeQuietly(client.unwrap()); super.teardown(); } @Test public void testCreateTransactionWithMode() throws Exception { complete(AsyncWrappers.asyncEnsureContainers(client, "/test")); CuratorOp op1 = client.transactionOp().create().withMode(PERSISTENT_SEQUENTIAL).forPath("/test/node-"); CuratorOp op2 = client.transactionOp().create().withMode(PERSISTENT_SEQUENTIAL).forPath("/test/node-"); complete(client.transaction().forOperations(Arrays.asList(op1, op2))); Assert.assertEquals(client.unwrap().getChildren().forPath("/test").size(), 2); } @Test public void testCrud() { AsyncStage<String> createStage = client.create().forPath("/test", "one".getBytes()); complete(createStage, (path, e) -> Assert.assertEquals(path, "/test")); AsyncStage<byte[]> getStage = client.getData().forPath("/test"); complete(getStage, (data, e) -> Assert.assertEquals(data, "one".getBytes())); CompletionStage<byte[]> combinedStage = client.setData().forPath("/test", "new".getBytes()) .thenCompose(__ -> client.getData().forPath("/test")); complete(combinedStage, (data, e) -> Assert.assertEquals(data, "new".getBytes())); CompletionStage<Void> combinedDelete = client.create().withMode(EPHEMERAL_SEQUENTIAL).forPath("/deleteme") .thenCompose(path -> client.delete().forPath(path)); complete(combinedDelete, (v, e) -> Assert.assertNull(e)); CompletionStage<byte[]> setDataIfStage = client.create().withOptions(of(compress, setDataIfExists)) .forPath("/test", "last".getBytes()) .thenCompose(__ -> client.getData().decompressed().forPath("/test")); complete(setDataIfStage, (data, e) -> Assert.assertEquals(data, "last".getBytes())); } @Test public void testException() { CountDownLatch latch = new CountDownLatch(1); client.getData().forPath("/woop").exceptionally(e -> { Assert.assertTrue(e instanceof KeeperException); Assert.assertEquals(((KeeperException) e).code(), KeeperException.Code.NONODE); latch.countDown(); return null; }); Assert.assertTrue(timing.awaitLatch(latch)); } @Test public void testWatching() { CountDownLatch latch = new CountDownLatch(1); client.watched().checkExists().forPath("/test").event().whenComplete((event, exception) -> { Assert.assertNull(exception); Assert.assertEquals(event.getType(), Watcher.Event.EventType.NodeCreated); latch.countDown(); }); client.create().forPath("/test"); Assert.assertTrue(timing.awaitLatch(latch)); } @Test public void testWatchingWithServerLoss() throws Exception { AsyncStage<Stat> stage = client.watched().checkExists().forPath("/test"); stage.thenRun(() -> { try { server.stop(); } catch (IOException e) { // ignore } }); CountDownLatch latch = new CountDownLatch(1); complete(stage.event(), (v, e) -> { Assert.assertTrue(e instanceof AsyncEventException); Assert.assertEquals(((AsyncEventException) e).getKeeperState(), Watcher.Event.KeeperState.Disconnected); ((AsyncEventException) e).reset().thenRun(latch::countDown); }); server.restart(); client.create().forPath("/test"); Assert.assertTrue(timing.awaitLatch(latch)); } @Test public void testResultWrapper() throws Exception { CompletionStage<AsyncResult<String>> resultStage = AsyncResult.of(client.create().forPath("/first")); complete(resultStage, (v, e) -> { Assert.assertNull(e); Assert.assertEquals(v.getRawValue(), "/first"); Assert.assertNull(v.getRawException()); Assert.assertEquals(v.getCode(), KeeperException.Code.OK); }); resultStage = AsyncResult.of(client.create().forPath("/foo/bar")); complete(resultStage, (v, e) -> { Assert.assertNull(e); Assert.assertNull(v.getRawValue()); Assert.assertNull(v.getRawException()); Assert.assertEquals(v.getCode(), KeeperException.Code.NONODE); }); resultStage = AsyncResult.of(client.create().forPath("illegal path")); complete(resultStage, (v, e) -> { Assert.assertNull(e); Assert.assertNull(v.getRawValue()); Assert.assertNotNull(v.getRawException()); Assert.assertTrue(v.getRawException() instanceof IllegalArgumentException); Assert.assertEquals(v.getCode(), KeeperException.Code.SYSTEMERROR); }); server.stop(); resultStage = AsyncResult.of(client.create().forPath("/second")); complete(resultStage, (v, e) -> { Assert.assertNull(e); Assert.assertNull(v.getRawValue()); Assert.assertNull(v.getRawException()); Assert.assertEquals(v.getCode(), KeeperException.Code.CONNECTIONLOSS); }); } @Test public void testGetDataWithStat() { complete(client.create().forPath("/test", "hey".getBytes())); Stat stat = new Stat(); complete(client.getData().storingStatIn(stat).forPath("/test")); Assert.assertEquals(stat.getDataLength(), "hey".length()); } }