package org.infinispan.tx;
import java.util.concurrent.CountDownLatch;
import javax.transaction.Transaction;
import javax.transaction.TransactionManager;
import org.infinispan.Cache;
import org.infinispan.configuration.cache.ConfigurationBuilder;
import org.infinispan.manager.EmbeddedCacheManager;
import org.infinispan.test.SingleCacheManagerTest;
import org.infinispan.test.fwk.TestCacheManagerFactory;
import org.infinispan.transaction.lookup.EmbeddedTransactionManagerLookup;
import org.infinispan.transaction.tm.EmbeddedTransaction;
import org.infinispan.transaction.tm.EmbeddedTransactionManager;
import org.testng.annotations.Test;
/**
* This tests the following pattern:
* <p/>
* Thread T1 holds lock for key K. TX1 attempts to lock a key K. Waits for lock. TM times out the tx and aborts the tx
* (calls XA.end, XA.rollback). T1 releases lock. Wait a few seconds. Make sure there are no stale locks (i.e., when the
* thread for TX1 wakes up and gets the lock on K, it then releases and aborts).
*
* @author manik
*/
@Test (testName = "tx.StaleLockAfterTxAbortTest", groups = "unit")
public class StaleLockAfterTxAbortTest extends SingleCacheManagerTest {
final String k = "key";
@Override
protected EmbeddedCacheManager createCacheManager() throws Exception {
ConfigurationBuilder c = getDefaultStandaloneCacheConfig(true);
c.transaction().transactionManagerLookup(new EmbeddedTransactionManagerLookup()).useSynchronization(false).recovery().disable();
return TestCacheManagerFactory.createCacheManager(c);
}
public void doTest() throws Throwable {
cache.put(k, "value"); // init value
assertEventuallyNotLocked(cache, k);
// InvocationContextContainerImpl icc = (InvocationContextContainerImpl) TestingUtil.extractComponent(cache, InvocationContextContainer.class);
// InvocationContext ctx = icc.getInvocationContext();
// LockManager lockManager = TestingUtil.extractComponent(cache, LockManager.class);
// lockManager.lockAndRecord(k, ctx);
// ctx.putLookedUpEntry(k, null);
EmbeddedTransactionManager dtm = (EmbeddedTransactionManager) tm();
tm().begin();
cache.put(k, "some");
final EmbeddedTransaction transaction = dtm.getTransaction();
transaction.runPrepare();
tm().suspend();
// test that the key is indeed locked.
assertLocked(cache, k);
final CountDownLatch txStartedLatch = new CountDownLatch(1);
TxThread transactionThread = new TxThread(cache, txStartedLatch);
transactionThread.start();
txStartedLatch.countDown();
Thread.sleep(500); // in case the thread needs some time to get to the locking code
// now abort the tx.
transactionThread.tm.resume(transactionThread.tx);
transactionThread.tm.rollback();
// now release the lock
tm().resume(transaction);
transaction.runCommit(true);
transactionThread.join();
assertEventuallyNotLocked(cache, k);
}
private class TxThread extends Thread {
final Cache<Object, Object> cache;
volatile Transaction tx;
volatile Exception exception;
final TransactionManager tm;
final CountDownLatch txStartedLatch;
private TxThread(Cache<Object, Object> cache, CountDownLatch txStartedLatch) {
this.cache = cache;
this.tx = null;
this.tm = cache.getAdvancedCache().getTransactionManager();
this.txStartedLatch = txStartedLatch;
}
@Override
public void run() {
try {
// Now start a new tx.
tm.begin();
tx = tm.getTransaction();
log.trace("Started transaction " + tx);
txStartedLatch.countDown();
cache.put(k, "v2"); // this should block.
} catch (Exception e) {
exception = e;
}
}
}
}