Examples with ZcStat org.apache.accumulo.fate.zookeeper.ZooCache.ZcStat used on opensource projects

Example 1 with ZcStat

use of org.apache.accumulo.fate.zookeeper.ZooCache.ZcStat in project accumulo by apache.

the class ZooCacheTest method testGet.

private void testGet(boolean fillStat) throws Exception {
    ZcStat myStat = null;
    if (fillStat) {
        myStat = new ZcStat();
    }
    final long ephemeralOwner = 123456789L;
    Stat existsStat = new Stat();
    existsStat.setEphemeralOwner(ephemeralOwner);
    expect(zk.exists(eq(ZPATH), anyObject(Watcher.class))).andReturn(existsStat);
    expect(zk.getData(eq(ZPATH), anyObject(Watcher.class), eq(existsStat))).andReturn(DATA);
    replay(zk);
    assertFalse(zc.dataCached(ZPATH));
    assertArrayEquals(DATA, (fillStat ? zc.get(ZPATH, myStat) : zc.get(ZPATH)));
    verify(zk);
    if (fillStat) {
        assertEquals(ephemeralOwner, myStat.getEphemeralOwner());
    }
    assertTrue(zc.dataCached(ZPATH));
    // cache hit
    assertSame(DATA, zc.get(ZPATH));
}

Example 2 with ZcStat

use of org.apache.accumulo.fate.zookeeper.ZooCache.ZcStat in project accumulo by apache.

the class AdminTest method testQualifySessionId.

@Test
public void testQualifySessionId() {
    ZooCache zc = EasyMock.createMock(ZooCache.class);
    String root = "/accumulo/id/tservers";
    String server = "localhost:12345";
    final long session = 123456789l;
    String serverPath = root + "/" + server;
    EasyMock.expect(zc.getChildren(serverPath)).andReturn(Collections.singletonList("child"));
    EasyMock.expect(zc.get(EasyMock.eq(serverPath + "/child"), EasyMock.anyObject(ZcStat.class))).andAnswer(new IAnswer<byte[]>() {

        @Override
        public byte[] answer() throws Throwable {
            ZcStat stat = (ZcStat) EasyMock.getCurrentArguments()[1];
            stat.setEphemeralOwner(session);
            return new byte[0];
        }
    });
    EasyMock.replay(zc);
    assertEquals(server + "[" + Long.toHexString(session) + "]", Admin.qualifyWithZooKeeperSessionId(root, zc, server));
    EasyMock.verify(zc);
}

Example 3 with ZcStat

use of org.apache.accumulo.fate.zookeeper.ZooCache.ZcStat in project accumulo by apache.

the class ZooLock method isLockHeld.

public static boolean isLockHeld(ZooCache zc, LockID lid) {
    List<String> children = zc.getChildren(lid.path);
    if (children == null || children.size() == 0) {
        return false;
    }
    children = new ArrayList<>(children);
    Collections.sort(children);
    String lockNode = children.get(0);
    if (!lid.node.equals(lockNode))
        return false;
    ZcStat stat = new ZcStat();
    return zc.get(lid.path + "/" + lid.node, stat) != null && stat.getEphemeralOwner() == lid.eid;
}

Example 4 with ZcStat

use of org.apache.accumulo.fate.zookeeper.ZooCache.ZcStat in project accumulo by apache.

the class LiveTServerSet method checkServer.

private synchronized void checkServer(final Set<TServerInstance> updates, final Set<TServerInstance> doomed, final String path, final String zPath) throws TException, InterruptedException, KeeperException {
    TServerInfo info = current.get(zPath);
    final String lockPath = path + "/" + zPath;
    ZcStat stat = new ZcStat();
    byte[] lockData = ZooLock.getLockData(getZooCache(), lockPath, stat);
    if (lockData == null) {
        if (info != null) {
            doomed.add(info.instance);
            current.remove(zPath);
            currentInstances.remove(info.instance);
        }
        Long firstSeen = locklessServers.get(zPath);
        if (firstSeen == null) {
            locklessServers.put(zPath, System.currentTimeMillis());
        } else if (System.currentTimeMillis() - firstSeen > 10 * 60 * 1000) {
            deleteServerNode(path + "/" + zPath);
            locklessServers.remove(zPath);
        }
    } else {
        locklessServers.remove(zPath);
        ServerServices services = new ServerServices(new String(lockData, UTF_8));
        HostAndPort client = services.getAddress(ServerServices.Service.TSERV_CLIENT);
        TServerInstance instance = new TServerInstance(client, stat.getEphemeralOwner());
        if (info == null) {
            updates.add(instance);
            TServerInfo tServerInfo = new TServerInfo(instance, new TServerConnection(client));
            current.put(zPath, tServerInfo);
            currentInstances.put(instance, tServerInfo);
        } else if (!info.instance.equals(instance)) {
            doomed.add(info.instance);
            updates.add(instance);
            TServerInfo tServerInfo = new TServerInfo(instance, new TServerConnection(client));
            current.put(zPath, tServerInfo);
            currentInstances.remove(info.instance);
            currentInstances.put(instance, tServerInfo);
        }
    }
}

Example 5 with ZcStat

use of org.apache.accumulo.fate.zookeeper.ZooCache.ZcStat in project accumulo by apache.

the class ZooLock method getSessionId.

public static long getSessionId(ZooCache zc, String path) throws KeeperException, InterruptedException {
    List<String> children = zc.getChildren(path);
    if (children == null || children.size() == 0) {
        return 0;
    }
    children = new ArrayList<>(children);
    Collections.sort(children);
    String lockNode = children.get(0);
    ZcStat stat = new ZcStat();
    if (zc.get(path + "/" + lockNode, stat) != null)
        return stat.getEphemeralOwner();
    return 0;
}