package org.infinispan.util;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import static org.testng.Assert.assertEquals;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Lock;
import org.infinispan.commons.equivalence.AnyEquivalence;
import org.infinispan.configuration.cache.Configuration;
import org.infinispan.configuration.cache.ConfigurationBuilder;
import org.infinispan.context.InvocationContext;
import org.infinispan.context.impl.LocalTxInvocationContext;
import org.infinispan.context.impl.NonTxInvocationContext;
import org.infinispan.test.AbstractInfinispanTest;
import org.infinispan.transaction.impl.LocalTransaction;
import org.infinispan.transaction.xa.DldGlobalTransaction;
import org.infinispan.transaction.xa.TransactionFactory;
import org.infinispan.util.concurrent.locks.DeadlockDetectedException;
import org.infinispan.util.concurrent.locks.DeadlockDetectingLockManager;
import org.infinispan.util.concurrent.locks.containers.LockContainer;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
/**
* Tests functionality in {@link org.infinispan.util.concurrent.locks.DeadlockDetectingLockManager}.
*
* @author Mircea.Markus@jboss.com
*/
@Test(groups = "unit", testName = "util.DeadlockDetectingLockManagerTest")
public class DeadlockDetectingLockManagerTest extends AbstractInfinispanTest {
DeadlockDetectingLockManagerMock lockManager;
Configuration config = new ConfigurationBuilder().build();
private LockContainer lc;
private static final int SPIN_DURATION = 1000;
private DldGlobalTransaction lockOwner;
@BeforeMethod
public void setUp() {
lc = mock(LockContainer.class);
lockManager = new DeadlockDetectingLockManagerMock(SPIN_DURATION, true, lc, config);
lockManager.injectTimeService(TIME_SERVICE);
lockOwner = (DldGlobalTransaction) TransactionFactory.TxFactoryEnum.DLD_NORECOVERY_XA.newGlobalTransaction();
}
public void testNoTransaction() throws Exception {
InvocationContext nonTx = new NonTxInvocationContext(AnyEquivalence.getInstance());
Lock mockLock = mock(Lock.class);
when(lc.acquireLock(nonTx.getLockOwner(), "k", config.locking().lockAcquisitionTimeout(), TimeUnit.MILLISECONDS)).thenReturn(mockLock).thenReturn(null);
assert lockManager.lockAndRecord("k", nonTx, config.locking().lockAcquisitionTimeout());
assert !lockManager.lockAndRecord("k", nonTx, config.locking().lockAcquisitionTimeout());
}
public void testLockHeldByThread() throws Exception {
InvocationContext localTxContext = buildLocalTxIc(new DldGlobalTransaction());
Lock mockLock = mock(Lock.class);
//this makes sure that we cannot acquire lock from the first try
when(lc.acquireLock(localTxContext.getLockOwner(), "k", SPIN_DURATION, TimeUnit.MILLISECONDS)).thenReturn(null).thenReturn(mockLock);
lockManager.setOwner(Thread.currentThread() );
//next lock acquisition will succeed
assert lockManager.lockAndRecord("k", localTxContext, config.locking().lockAcquisitionTimeout());
assert lockManager.getOverlapWithNotDeadlockAwareLockOwners() == 1;
}
public void testLocalDeadlock() throws Exception {
final DldGlobalTransaction ddgt = (DldGlobalTransaction) TransactionFactory.TxFactoryEnum.DLD_NORECOVERY_XA.newGlobalTransaction();
InvocationContext localTxContext = buildLocalTxIc(ddgt);
ddgt.setCoinToss(0);
lockOwner.setCoinToss(1);
assert ddgt.wouldLose(lockOwner);
//this makes sure that we cannot acquire lock from the first try
Lock mockLock = mock(Lock.class);
when(lc.acquireLock(localTxContext.getLockOwner(), "k", SPIN_DURATION, TimeUnit.MILLISECONDS)).thenReturn(null).thenReturn(mockLock);
lockOwner.setRemote(false);
lockOwner.setLockIntention("k");
lockManager.setOwner(lockOwner);
lockManager.setOwnsLock(true);
try {
lockManager.lockAndRecord("k", localTxContext, config.locking().lockAcquisitionTimeout());
assert false;
} catch (DeadlockDetectedException e) {
//expected
}
assertEquals(1l,lockManager.getDetectedLocalDeadlocks());
}
private InvocationContext buildLocalTxIc(final DldGlobalTransaction ddgt) {
return new LocalTxInvocationContext(mock(LocalTransaction.class)) {
@Override
public Object getLockOwner() {
return ddgt;
}
};
}
public static class DeadlockDetectingLockManagerMock extends DeadlockDetectingLockManager {
private Object owner;
private boolean ownsLock;
public DeadlockDetectingLockManagerMock(long spinDuration, boolean exposeJmxStats, LockContainer lockContainer, Configuration configuration) {
this.spinDuration = spinDuration;
this.exposeJmxStats = exposeJmxStats;
super.lockContainer = lockContainer;
this.configuration = configuration;
}
public void setOwner(Object owner) {
this.owner = owner;
}
public void setOwnsLock(boolean ownsLock) {
this.ownsLock = ownsLock;
}
@Override
public Object getOwner(Object key) {
return owner;
}
@Override
public boolean ownsLock(Object key, Object owner) {
return ownsLock;
}
}
}