@Test
  public void testFindNextToClean() throws Exception {
    CompactionRequest rqst = new CompactionRequest("foo", "bar", CompactionType.MINOR);
    rqst.setPartitionname("ds=today");
    txnHandler.compact(rqst);
    assertEquals(0, txnHandler.findReadyToClean().size());
    CompactionInfo ci = txnHandler.findNextToCompact("fred");
    assertNotNull(ci);

    assertEquals(0, txnHandler.findReadyToClean().size());
    txnHandler.markCompacted(ci);
    assertNull(txnHandler.findNextToCompact("fred"));

    List<CompactionInfo> toClean = txnHandler.findReadyToClean();
    assertEquals(1, toClean.size());
    assertNull(txnHandler.findNextToCompact("fred"));

    ShowCompactResponse rsp = txnHandler.showCompact(new ShowCompactRequest());
    List<ShowCompactResponseElement> compacts = rsp.getCompacts();
    assertEquals(1, compacts.size());
    ShowCompactResponseElement c = compacts.get(0);
    assertEquals("foo", c.getDbname());
    assertEquals("bar", c.getTablename());
    assertEquals("ds=today", c.getPartitionname());
    assertEquals(CompactionType.MINOR, c.getType());
    assertEquals("ready for cleaning", c.getState());
    assertNull(c.getWorkerid());
  }
  @Test
  public void testMarkCleaned() throws Exception {
    CompactionRequest rqst = new CompactionRequest("foo", "bar", CompactionType.MINOR);
    rqst.setPartitionname("ds=today");
    txnHandler.compact(rqst);
    assertEquals(0, txnHandler.findReadyToClean().size());
    CompactionInfo ci = txnHandler.findNextToCompact("fred");
    assertNotNull(ci);

    assertEquals(0, txnHandler.findReadyToClean().size());
    txnHandler.markCompacted(ci);
    assertNull(txnHandler.findNextToCompact("fred"));

    List<CompactionInfo> toClean = txnHandler.findReadyToClean();
    assertEquals(1, toClean.size());
    assertNull(txnHandler.findNextToCompact("fred"));
    txnHandler.markCleaned(ci);
    assertNull(txnHandler.findNextToCompact("fred"));
    assertEquals(0, txnHandler.findReadyToClean().size());

    ShowCompactResponse rsp = txnHandler.showCompact(new ShowCompactRequest());
    assertEquals(1, rsp.getCompactsSize());
    assertTrue(TxnHandler.SUCCEEDED_RESPONSE.equals(rsp.getCompacts().get(0).getState()));
  }
  @Test
  public void testMarkCleanedCleansTxnsAndTxnComponents() throws Exception {
    long txnid = openTxn();
    LockComponent comp = new LockComponent(LockType.SHARED_WRITE, LockLevel.DB, "mydb");
    comp.setTablename("mytable");
    comp.setOperationType(DataOperationType.INSERT);
    List<LockComponent> components = new ArrayList<LockComponent>(1);
    components.add(comp);
    LockRequest req = new LockRequest(components, "me", "localhost");
    req.setTxnid(txnid);
    LockResponse res = txnHandler.lock(req);
    assertTrue(res.getState() == LockState.ACQUIRED);
    txnHandler.abortTxn(new AbortTxnRequest(txnid));

    txnid = openTxn();
    comp = new LockComponent(LockType.SHARED_WRITE, LockLevel.DB, "mydb");
    comp.setTablename("yourtable");
    comp.setOperationType(DataOperationType.DELETE);
    components = new ArrayList<LockComponent>(1);
    components.add(comp);
    req = new LockRequest(components, "me", "localhost");
    req.setTxnid(txnid);
    res = txnHandler.lock(req);
    assertTrue(res.getState() == LockState.ACQUIRED);
    txnHandler.abortTxn(new AbortTxnRequest(txnid));

    txnid = openTxn();
    comp = new LockComponent(LockType.SHARED_WRITE, LockLevel.DB, "mydb");
    comp.setTablename("foo");
    comp.setPartitionname("bar");
    comp.setOperationType(DataOperationType.UPDATE);
    components = new ArrayList<LockComponent>(1);
    components.add(comp);
    req = new LockRequest(components, "me", "localhost");
    req.setTxnid(txnid);
    res = txnHandler.lock(req);
    assertTrue(res.getState() == LockState.ACQUIRED);

    comp = new LockComponent(LockType.SHARED_WRITE, LockLevel.DB, "mydb");
    comp.setTablename("foo");
    comp.setPartitionname("baz");
    comp.setOperationType(DataOperationType.UPDATE);
    components = new ArrayList<LockComponent>(1);
    components.add(comp);
    req = new LockRequest(components, "me", "localhost");
    req.setTxnid(txnid);
    res = txnHandler.lock(req);
    assertTrue(res.getState() == LockState.ACQUIRED);
    txnHandler.abortTxn(new AbortTxnRequest(txnid));

    CompactionInfo ci = new CompactionInfo();

    // Now clean them and check that they are removed from the count.
    CompactionRequest rqst = new CompactionRequest("mydb", "mytable", CompactionType.MAJOR);
    txnHandler.compact(rqst);
    assertEquals(0, txnHandler.findReadyToClean().size());
    ci = txnHandler.findNextToCompact("fred");
    assertNotNull(ci);
    txnHandler.markCompacted(ci);

    List<CompactionInfo> toClean = txnHandler.findReadyToClean();
    assertEquals(1, toClean.size());
    txnHandler.markCleaned(ci);

    // Check that we are cleaning up the empty aborted transactions
    GetOpenTxnsResponse txnList = txnHandler.getOpenTxns();
    assertEquals(3, txnList.getOpen_txnsSize());
    txnHandler.cleanEmptyAbortedTxns();
    txnList = txnHandler.getOpenTxns();
    assertEquals(2, txnList.getOpen_txnsSize());

    rqst = new CompactionRequest("mydb", "foo", CompactionType.MAJOR);
    rqst.setPartitionname("bar");
    txnHandler.compact(rqst);
    assertEquals(0, txnHandler.findReadyToClean().size());
    ci = txnHandler.findNextToCompact("fred");
    assertNotNull(ci);
    txnHandler.markCompacted(ci);

    toClean = txnHandler.findReadyToClean();
    assertEquals(1, toClean.size());
    txnHandler.markCleaned(ci);

    txnHandler.openTxns(new OpenTxnRequest(1, "me", "localhost"));
    txnHandler.cleanEmptyAbortedTxns();
    txnList = txnHandler.getOpenTxns();
    assertEquals(3, txnList.getOpen_txnsSize());
  }