Examples of WatchedEvent

org.apache.zookeeper.WatchedEvent
A WatchedEvent represents a change on the ZooKeeper that a Watcher is able to respond to. The WatchedEvent includes exactly what happened, the current state of the ZooKeeper, and the path of the znode that was involved in the event.
org.apache.zookeeper_voltpatches.WatchedEvent
A WatchedEvent represents a change on the ZooKeeper that a Watcher is able to respond to. The WatchedEvent includes exactly what happened, the current state of the ZooKeeper, and the path of the znode that was involved in the event.

Examples of org.apache.zookeeper.WatchedEvent

             * when the initial (or previously failed) connection cannot be re-established. This needs to be run through the retry policy
             * and callbacks need to get invoked, etc.
             */
            if ( e instanceof CuratorConnectionLossException )
            {
                WatchedEvent watchedEvent = new WatchedEvent(Watcher.Event.EventType.None, Watcher.Event.KeeperState.Disconnected, null);
                CuratorEvent event = new CuratorEventImpl(this, CuratorEventType.WATCHED, KeeperException.Code.CONNECTIONLOSS.intValue(), null, null, operationAndData.getContext(), null, null, null, watchedEvent, null);
                if ( checkBackgroundRetry(operationAndData, event) )
                {
                    queueOperation(operationAndData);
                }

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Examples of org.apache.zookeeper.WatchedEvent

                zk.delete(name, stat.getVersion(), vcb, null);
            }


            for (int i = 0; i < names.length; i++) {
                String name = names[i];
                WatchedEvent event = watcher.events.poll(10, TimeUnit.SECONDS);
                assertEquals(name, event.getPath());
                assertEquals(Event.EventType.NodeDataChanged, event.getType());
                assertEquals(Event.KeeperState.SyncConnected, event.getState());
                event = watcher.events.poll(10, TimeUnit.SECONDS);
                assertEquals(name, event.getPath());
                assertEquals(Event.EventType.NodeDeleted, event.getType());
                assertEquals(Event.KeeperState.SyncConnected, event.getState());
            }
        } finally {
            if (zk != null) {
                zk.close();
            }

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Examples of org.apache.zookeeper.WatchedEvent

        assertTrue(localWatcher.events.isEmpty());
        zk.setData("/watchtest/child", new byte[1], -1);
        zk.create("/watchtest/child2", new byte[0], Ids.OPEN_ACL_UNSAFE,
                CreateMode.PERSISTENT);


        WatchedEvent e = localWatcher.events.poll(10, TimeUnit.SECONDS);
        if (!ClientCnxn.disableAutoWatchReset) {
            assertEquals(e.getPath(), EventType.NodeDataChanged, e.getType());
            assertEquals("/watchtest/child", e.getPath());
        } else {
            assertNull("unexpected event", e);
        }


        e = localWatcher.events.poll(10, TimeUnit.SECONDS);
        if (!ClientCnxn.disableAutoWatchReset) {
            // The create will trigger the get children and the exist
            // watches
            assertEquals(EventType.NodeCreated, e.getType());
            assertEquals("/watchtest/child2", e.getPath());
        } else {
            assertNull("unexpected event", e);
        }


        e = localWatcher.events.poll(10, TimeUnit.SECONDS);
        if (!ClientCnxn.disableAutoWatchReset) {
            assertEquals(EventType.NodeChildrenChanged, e.getType());
            assertEquals("/watchtest", e.getPath());
        } else {
            assertNull("unexpected event", e);
        }


        // Make sure PINGs don't screw us up!
        Thread.sleep(4000);


        assertTrue(localWatcher.events.isEmpty()); // ensure no late arrivals
        stopServer();
        globalWatcher.waitForDisconnected(3000);
        try {
        try {
            localWatcher.waitForDisconnected(500);
            if (!isGlobal && !ClientCnxn.disableAutoWatchReset) {
                fail("Got an event when I shouldn't have");
            }
        } catch(TimeoutException toe) {
            if (ClientCnxn.disableAutoWatchReset) {
                fail("Didn't get an event when I should have");
            }
            // Else what we are expecting since there are no outstanding watches
        }
        } catch (Exception e1) {
            LOG.error("bad", e1);
            throw new RuntimeException(e1);
        }
        startServer();
        globalWatcher.waitForConnected(3000);


        if (isGlobal) {
            zk.getChildren("/watchtest", true);
            zk.getData("/watchtest/child", true, new Stat());
            zk.exists("/watchtest/child2", true);
        } else {
            zk.getChildren("/watchtest", localWatcher);
            zk.getData("/watchtest/child", localWatcher, new Stat());
            zk.exists("/watchtest/child2", localWatcher);
        }


        // Do trigger an event to make sure that we do not get
        // it later
        zk.delete("/watchtest/child2", -1);


        e = localWatcher.events.poll(10, TimeUnit.SECONDS);
        assertEquals(EventType.NodeDeleted, e.getType());
        assertEquals("/watchtest/child2", e.getPath());


        e = localWatcher.events.poll(10, TimeUnit.SECONDS);
        assertEquals(EventType.NodeChildrenChanged, e.getType());
        assertEquals("/watchtest", e.getPath());


        assertTrue(localWatcher.events.isEmpty());


        stopServer();
        globalWatcher.waitForDisconnected(3000);
        localWatcher.waitForDisconnected(500);
        startServer();
        globalWatcher.waitForConnected(3000);
        if (!isGlobal && !ClientCnxn.disableAutoWatchReset) {
            localWatcher.waitForConnected(500);
        }


        zk.delete("/watchtest/child", -1);
        zk.delete("/watchtest", -1);


        e = localWatcher.events.poll(10, TimeUnit.SECONDS);
        if (!ClientCnxn.disableAutoWatchReset) {
            assertEquals(EventType.NodeDeleted, e.getType());
            assertEquals("/watchtest/child", e.getPath());
        } else {
            assertNull("unexpected event", e);
        }


        // Make sure nothing is straggling!

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Examples of org.apache.zookeeper.WatchedEvent

            for (int i = 0; i < watchers.length; i++) {
                zk.setData("/foo-" + i, ("foodata2-" + i).getBytes(), -1);
                zk.setData("/foo-" + i, ("foodata3-" + i).getBytes(), -1);
            }
            for (int i = 0; i < watchers.length; i++) {
                WatchedEvent event =
                    watchers[i].events.poll(10, TimeUnit.SECONDS);
                assertEquals("/foo-" + i, event.getPath());
                assertEquals(EventType.NodeDataChanged, event.getType());
                assertEquals(KeeperState.SyncConnected, event.getState());
                
                // small chance that an unexpected message was delivered
                //  after this check, but we would catch that next time
                //  we check events
                assertEquals(0, watchers[i].events.size());
            }
            
            //
            // test get/exists with single set of watchers
            //  get/exists together
            //
            for (int i = 0; i < watchers.length; i++) {
                assertNotNull(zk.getData("/foo-" + i, watchers[i], stat));
                assertNotNull(zk.exists("/foo-" + i, watchers[i]));
            }
            // trigger the watches
            for (int i = 0; i < watchers.length; i++) {
                zk.setData("/foo-" + i, ("foodata4-" + i).getBytes(), -1);
                zk.setData("/foo-" + i, ("foodata5-" + i).getBytes(), -1);
            }
            for (int i = 0; i < watchers.length; i++) {
                WatchedEvent event =
                    watchers[i].events.poll(10, TimeUnit.SECONDS);
                assertEquals("/foo-" + i, event.getPath());
                assertEquals(EventType.NodeDataChanged, event.getType());
                assertEquals(KeeperState.SyncConnected, event.getState());
                
                // small chance that an unexpected message was delivered
                //  after this check, but we would catch that next time
                //  we check events
                assertEquals(0, watchers[i].events.size());
            }
            
            //
            // test get/exists with two sets of watchers
            //
            for (int i = 0; i < watchers.length; i++) {
                assertNotNull(zk.getData("/foo-" + i, watchers[i], stat));
                assertNotNull(zk.exists("/foo-" + i, watchers2[i]));
            }
            // trigger the watches
            for (int i = 0; i < watchers.length; i++) {
                zk.setData("/foo-" + i, ("foodata6-" + i).getBytes(), -1);
                zk.setData("/foo-" + i, ("foodata7-" + i).getBytes(), -1);
            }
            for (int i = 0; i < watchers.length; i++) {
                WatchedEvent event =
                    watchers[i].events.poll(10, TimeUnit.SECONDS);
                assertEquals("/foo-" + i, event.getPath());
                assertEquals(EventType.NodeDataChanged, event.getType());
                assertEquals(KeeperState.SyncConnected, event.getState());
                
                // small chance that an unexpected message was delivered
                //  after this check, but we would catch that next time
                //  we check events
                assertEquals(0, watchers[i].events.size());


                // watchers2
                WatchedEvent event2 =
                    watchers2[i].events.poll(10, TimeUnit.SECONDS);
                assertEquals("/foo-" + i, event2.getPath());
                assertEquals(EventType.NodeDataChanged, event2.getType());
                assertEquals(KeeperState.SyncConnected, event2.getState());
                
                // small chance that an unexpected message was delivered
                //  after this check, but we would catch that next time
                //  we check events
                assertEquals(0, watchers2[i].events.size());

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Examples of org.apache.zookeeper.WatchedEvent

            zk.create("/frog", "hi".getBytes(), Ids.OPEN_ACL_UNSAFE,
                    CreateMode.PERSISTENT);
            // the first poll is just a session delivery
            LOG.info("Comment: checking for events length "
                     + watcher.events.size());
            WatchedEvent event = watcher.events.poll(10, TimeUnit.SECONDS);
            assertEquals("/frog", event.getPath());
            assertEquals(EventType.NodeCreated, event.getType());
            assertEquals(KeeperState.SyncConnected, event.getState());
            // Test child watch and create with sequence
            zk.getChildren("/ben", true);
            for (int i = 0; i < 10; i++) {
                zk.create("/ben/" + i + "-", Integer.toString(i).getBytes(),
                        Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT_SEQUENTIAL);
            }
            children = zk.getChildren("/ben", false);
            Collections.sort(children);
            assertEquals(10, children.size());
            for (int i = 0; i < 10; i++) {
                final String name = children.get(i);
                assertTrue("starts with -", name.startsWith(i + "-"));
                byte b[];
                if (withWatcherObj) {
                    b = zk.getData("/ben/" + name, watcher, stat);
                } else {
                    b = zk.getData("/ben/" + name, true, stat);
                }
                assertEquals(Integer.toString(i), new String(b));
                zk.setData("/ben/" + name, "new".getBytes(), stat.getVersion());
                if (withWatcherObj) {
                    stat = zk.exists("/ben/" + name, watcher);
                } else {
                stat = zk.exists("/ben/" + name, true);
                }
                zk.delete("/ben/" + name, stat.getVersion());
            }
            event = watcher.events.poll(10, TimeUnit.SECONDS);
            assertEquals("/ben", event.getPath());
            assertEquals(EventType.NodeChildrenChanged, event.getType());
            assertEquals(KeeperState.SyncConnected, event.getState());
            for (int i = 0; i < 10; i++) {
                event = watcher.events.poll(10, TimeUnit.SECONDS);
                final String name = children.get(i);
                assertEquals("/ben/" + name, event.getPath());
                assertEquals(EventType.NodeDataChanged, event.getType());
                assertEquals(KeeperState.SyncConnected, event.getState());
                event = watcher.events.poll(10, TimeUnit.SECONDS);
                assertEquals("/ben/" + name, event.getPath());
                assertEquals(EventType.NodeDeleted, event.getType());
                assertEquals(KeeperState.SyncConnected, event.getState());
            }
            zk.create("/good\u0001path", "".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
            //try {
            //    zk.create("/bad\u0000path", "".getBytes(), null, CreateMode.PERSISTENT);
            //    fail("created an invalid path");

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Examples of org.apache.zookeeper.WatchedEvent

            } catch (InterruptedException e) {
                assertTrue("interruption unexpected", false);
            }
        }
        public void verify(List<EventType> expected) throws InterruptedException{
            WatchedEvent event;
            int count = 0;
            while (count < expected.size()
                    && (event = events.poll(30, TimeUnit.SECONDS)) != null)
            {
                assertEquals(expected.get(count), event.getType());
                count++;
            }
            assertEquals(expected.size(), count);
            events.clear();
        }

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Examples of org.apache.zookeeper.WatchedEvent

        // EventWatch is a simple, immutable type, so all we need to do
       // is make sure we can create all possible combinations of values.


        EnumSet<EventType> allTypes = EnumSet.allOf(EventType.class);
       EnumSet<KeeperState> allStates = EnumSet.allOf(KeeperState.class);
       WatchedEvent we;


        for(EventType et : allTypes) {
           for(KeeperState ks : allStates) {
               we = new WatchedEvent(et, ks, "blah");
               assertEquals(et, we.getType());
               assertEquals(ks, we.getState());
               assertEquals("blah", we.getPath());
           }
            
        }
    }

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Examples of org.apache.zookeeper.WatchedEvent

    public void testCreatingWatchedEventFromWrapper() {
        // Make sure we can handle any type of correct wrapper


        EnumSet<EventType> allTypes = EnumSet.allOf(EventType.class);
       EnumSet<KeeperState> allStates = EnumSet.allOf(KeeperState.class);
       WatchedEvent we;
       WatcherEvent wep;


        for(EventType et : allTypes) {
           for(KeeperState ks : allStates) {
               wep = new WatcherEvent(et.getIntValue(), ks.getIntValue(), "blah");
               we = new WatchedEvent(wep);
               assertEquals(et, we.getType());
               assertEquals(ks, we.getState());
               assertEquals("blah", we.getPath());
           }
        }
    }

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Examples of org.apache.zookeeper.WatchedEvent

    public void testCreatingWatchedEventFromInvalidWrapper() {
        // Make sure we can't convert from an invalid wrapper


       try {
           WatcherEvent wep = new WatcherEvent(-2342, -252352, "foo");
           WatchedEvent we = new WatchedEvent(wep);
           fail("Was able to create WatchedEvent from bad wrapper");
       } catch (RuntimeException re) {
           // we're good
       }
    }

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Examples of org.apache.zookeeper.WatchedEvent

       }
    }


   @Test
   public void testConvertingToEventWrapper() {
       WatchedEvent we = new WatchedEvent(EventType.NodeCreated, KeeperState.Expired, "blah");
       WatcherEvent wew = we.getWrapper();
       
       assertEquals(EventType.NodeCreated.getIntValue(), wew.getType());
       assertEquals(KeeperState.Expired.getIntValue(), wew.getState());
       assertEquals("blah", wew.getPath());
   }

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