Examples of HostProvider

org.apache.zookeeper.client.HostProvider
A set of hosts a ZooKeeper client should connect to. Classes implementing this interface must guarantee the following: * Every call to next() returns an InetSocketAddress. So the iterator never ends. * The size() of a HostProvider may never be zero. A HostProvider must return resolved InetSocketAddress instances on next(), but it's up to the HostProvider, when it wants to do the resolving. Different HostProvider could be imagined: * A HostProvider that loads the list of Hosts from an URL or from DNS * A HostProvider that re-resolves the InetSocketAddress after a timeout. * A HostProvider that prefers nearby hosts.

Examples of org.apache.zookeeper.client.HostProvider

public class StaticHostProviderTest extends ZKTestCase {
    private static final Logger LOG = LoggerFactory.getLogger(StaticHostProviderTest.class);
    
    @Test
    public void testNextGoesRound() throws UnknownHostException {
        HostProvider hostProvider = getHostProvider((byte) 2);
        InetSocketAddress first = hostProvider.next(0);
        assertTrue(first instanceof InetSocketAddress);
        hostProvider.next(0);
        assertEquals(first, hostProvider.next(0));
    }

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Examples of org.apache.zookeeper.client.HostProvider

    }


    @Test
    public void testNextGoesRoundAndSleeps() throws UnknownHostException {
        byte size = 2;
        HostProvider hostProvider = getHostProvider(size);
        while (size > 0) {
            hostProvider.next(0);
            --size;
        }
        long start = System.currentTimeMillis();
        hostProvider.next(1000);
        long stop = System.currentTimeMillis();
        assertTrue(900 <= stop - start);
    }

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Examples of org.apache.zookeeper.client.HostProvider

    }


    @Test
    public void testNextDoesNotSleepForZero() throws UnknownHostException {
        byte size = 2;
        HostProvider hostProvider = getHostProvider(size);
        while (size > 0) {
            hostProvider.next(0);
            --size;
        }
        long start = System.currentTimeMillis();
        hostProvider.next(0);
        long stop = System.currentTimeMillis();
        assertTrue(5 > stop - start);
    }

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Examples of org.apache.zookeeper.client.HostProvider

    }


    @Test
    public void testTwoConsequitiveCallsToNextReturnDifferentElement()
            throws UnknownHostException {
        HostProvider hostProvider = getHostProvider((byte) 2);
        assertNotSame(hostProvider.next(0), hostProvider.next(0));
    }

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Examples of org.apache.zookeeper.client.HostProvider

        assertNotSame(hostProvider.next(0), hostProvider.next(0));
    }


    @Test
    public void testOnConnectDoesNotReset() throws UnknownHostException {
        HostProvider hostProvider = getHostProvider((byte) 2);
        InetSocketAddress first = hostProvider.next(0);
        hostProvider.onConnected();
        InetSocketAddress second = hostProvider.next(0);
        assertNotSame(first, second);
    }

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Examples of org.apache.zookeeper.client.HostProvider

    }


    @Test
    public void testLiteralIPNoReverseNS() throws Exception {
        byte size = 30;
        HostProvider hostProvider = getHostProviderUnresolved(size);
        for (int i = 0; i < size; i++) {
            InetSocketAddress next = hostProvider.next(0);
            assertTrue(next instanceof InetSocketAddress);
            assertTrue(!next.isUnresolved());
            assertTrue("Did not match "+ next.toString(), !next.toString().startsWith("/"));
            // Do NOT trigger the reverse name service lookup.
            String hostname = next.getHostName();

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Examples of org.apache.zookeeper.client.HostProvider


        watchManager.defaultWatcher = watcher;


        ConnectStringParser connectStringParser = new ConnectStringParser(
                connectString);
        HostProvider hostProvider = new StaticHostProvider(
                connectStringParser.getServerAddresses());
        cnxn = new ClientCnxn(connectStringParser.getChrootPath(),
                hostProvider, sessionTimeout, this, watchManager,
                getClientCnxnSocket(), canBeReadOnly);
        cnxn.start();

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Examples of org.apache.zookeeper.client.HostProvider


        watchManager.defaultWatcher = watcher;


        ConnectStringParser connectStringParser = new ConnectStringParser(
                connectString);
        HostProvider hostProvider = new StaticHostProvider(
                connectStringParser.getServerAddresses());
        cnxn = new ClientCnxn(connectStringParser.getChrootPath(),
                hostProvider, sessionTimeout, this, watchManager,
                getClientCnxnSocket(), sessionId, sessionPasswd, canBeReadOnly);
        cnxn.seenRwServerBefore = true; // since user has provided sessionId

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Examples of org.apache.zookeeper.client.HostProvider

    public void testClient() {
        ZkClientx zk = ZooKeeperClient.getInstance();
        // 强制获取zk中的地址信息
        final ZooKeeper zkp = ((ZooKeeperx) zk.getConnection()).getZookeeper();
        ClientCnxn cnxn = (ClientCnxn) ReflectionUtils.getField(clientCnxnField, zkp);
        HostProvider hostProvider = (HostProvider) ReflectionUtils.getField(hostProviderField, cnxn);
        List<InetSocketAddress> serverAddrs = (List<InetSocketAddress>) ReflectionUtils.getField(serverAddressesField,
            hostProvider);
        want.number(serverAddrs.size()).isEqualTo(3);
        String s1 = serverAddrs.get(0).getAddress().getHostAddress() + ":" + serverAddrs.get(0).getPort();
        want.string(s1).isEqualTo(cluster1);

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Examples of org.apache.zookeeper.client.HostProvider

                // 添加第二组集群列表
                for (int i = 1; i < _servers.size(); i++) {
                    String cluster = _servers.get(i);
                    // 强制获取zk中的地址信息
                    ClientCnxn cnxn = (ClientCnxn) ReflectionUtils.getField(clientCnxnField, zk);
                    HostProvider hostProvider = (HostProvider) ReflectionUtils.getField(hostProviderField, cnxn);
                    List<InetSocketAddress> serverAddrs = (List<InetSocketAddress>) ReflectionUtils.getField(
                                                                                                             serverAddressesField,
                                                                                                             hostProvider);
                    // 添加第二组集群列表
                    serverAddrs.addAll(new ConnectStringParser(cluster).getServerAddresses());

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