Examples with MockSelectorThread org.apache.zookeeper.server.MockSelectorThread used on opensource projects

Example 1 with MockSelectorThread

use of org.apache.zookeeper.server.MockSelectorThread in project zookeeper by apache.

the class WatchLeakTest method testWatchesLeak.

/**
 * Check that if session has expired then no watch can be set
 */
@Test
public void testWatchesLeak() throws Exception {
    NIOServerCnxnFactory serverCnxnFactory = mock(NIOServerCnxnFactory.class);
    final SelectionKey sk = new FakeSK();
    MockSelectorThread selectorThread = mock(MockSelectorThread.class);
    when(selectorThread.addInterestOpsUpdateRequest(any(SelectionKey.class))).thenAnswer(new Answer<Boolean>() {

        @Override
        public Boolean answer(InvocationOnMock invocation) throws Throwable {
            SelectionKey sk = (SelectionKey) invocation.getArguments()[0];
            NIOServerCnxn nioSrvCnx = (NIOServerCnxn) sk.attachment();
            sk.interestOps(nioSrvCnx.getInterestOps());
            return true;
        }
    });
    ZKDatabase database = new ZKDatabase(null);
    database.setlastProcessedZxid(2L);
    QuorumPeer quorumPeer = mock(QuorumPeer.class);
    FileTxnSnapLog logfactory = mock(FileTxnSnapLog.class);
    // Directories are not used but we need it to avoid NPE
    when(logfactory.getDataDir()).thenReturn(new File(""));
    when(logfactory.getSnapDir()).thenReturn(new File(""));
    FollowerZooKeeperServer fzks = null;
    try {
        // Create a new follower
        fzks = new FollowerZooKeeperServer(logfactory, quorumPeer, database);
        fzks.startup();
        fzks.setServerCnxnFactory(serverCnxnFactory);
        quorumPeer.follower = new MyFollower(quorumPeer, fzks);
        LOG.info("Follower created");
        // Simulate a socket channel between a client and a follower
        final SocketChannel socketChannel = createClientSocketChannel();
        // Create the NIOServerCnxn that will handle the client requests
        final MockNIOServerCnxn nioCnxn = new MockNIOServerCnxn(fzks, socketChannel, sk, serverCnxnFactory, selectorThread);
        sk.attach(nioCnxn);
        // Send the connection request as a client do
        nioCnxn.doIO(sk);
        LOG.info("Client connection sent");
        // Send the valid or invalid session packet to the follower
        QuorumPacket qp = createValidateSessionPacketResponse(!sessionTimedout);
        quorumPeer.follower.processPacket(qp);
        LOG.info("Session validation sent");
        // OK, now the follower knows that the session is valid or invalid, let's try
        // to send the watches
        nioCnxn.doIO(sk);
        // wait for the the request processor to do his job
        Thread.sleep(1000L);
        LOG.info("Watches processed");
        // If session has not been validated, there must be NO watches
        int watchCount = database.getDataTree().getWatchCount();
        if (sessionTimedout) {
            // Session has not been re-validated !
            LOG.info("session is not valid, watches = {}", watchCount);
            assertEquals("Session is not valid so there should be no watches", 0, watchCount);
        } else {
            // Session has been re-validated
            LOG.info("session is valid, watches = {}", watchCount);
            assertEquals("Session is valid so the watch should be there", 1, watchCount);
        }
    } finally {
        if (fzks != null) {
            fzks.shutdown();
        }
    }
}