package org.infinispan.statetransfer;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.infinispan.test.TestingUtil.waitForNoRebalance;
import static org.testng.AssertJUnit.assertEquals;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicInteger;
import javax.transaction.TransactionManager;
import org.infinispan.Cache;
import org.infinispan.commands.ReplicableCommand;
import org.infinispan.commands.control.LockControlCommand;
import org.infinispan.commands.tx.CommitCommand;
import org.infinispan.commands.tx.PrepareCommand;
import org.infinispan.commands.write.PutKeyValueCommand;
import org.infinispan.configuration.cache.CacheMode;
import org.infinispan.configuration.cache.ConfigurationBuilder;
import org.infinispan.context.Flag;
import org.infinispan.context.InvocationContext;
import org.infinispan.context.impl.FlagBitSets;
import org.infinispan.context.impl.TxInvocationContext;
import org.infinispan.distribution.MagicKey;
import org.infinispan.interceptors.base.BaseCustomInterceptor;
import org.infinispan.interceptors.locking.PessimisticLockingInterceptor;
import org.infinispan.manager.EmbeddedCacheManager;
import org.infinispan.test.MultipleCacheManagersTest;
import org.infinispan.test.fwk.CheckPoint;
import org.infinispan.test.fwk.CleanupAfterMethod;
import org.infinispan.transaction.LockingMode;
import org.testng.annotations.Test;
/**
* Test that commands are properly retried during/after state transfer.
*
* @author Dan Berindei
* @since 8.2
*/
@Test(groups = "functional", testName = "statetransfer.GetWithForceWriteLockRetryTest")
@CleanupAfterMethod
public class GetWithForceWriteLockRetryTest extends MultipleCacheManagersTest {
public static final int CLUSTER_SIZE = 3;
@Override
protected void createCacheManagers() {
for (int i = 0; i < CLUSTER_SIZE; i++) {
addClusterEnabledCacheManager(buildConfig());
}
waitForClusterToForm();
}
private ConfigurationBuilder buildConfig() {
// The coordinator will always be the primary owner
ConfigurationBuilder configurationBuilder = getDefaultClusteredCacheConfig(CacheMode.REPL_SYNC, true);
configurationBuilder.clustering().hash().numSegments(60);
configurationBuilder.transaction().lockingMode(LockingMode.PESSIMISTIC);
return configurationBuilder;
}
public void testRetryAfterLeave() throws Exception {
EmbeddedCacheManager cm1 = manager(0);
Cache<Object, Object> c1 = cm1.getCache();
EmbeddedCacheManager cm2 = manager(1);
Cache c2 = cm2.getCache();
EmbeddedCacheManager cm3 = manager(2);
Cache c3 = cm3.getCache();
DelayInterceptor di3 = new DelayInterceptor(LockControlCommand.class);
c3.getAdvancedCache().addInterceptorBefore(di3, PessimisticLockingInterceptor.class);
Object key = new MagicKey(c3);
TransactionManager tm1 = tm(c1);
Future<Object> f = fork(() -> {
log.tracef("Initiating a transaction on backup owner %s", c2);
tm1.begin();
try {
c1.getAdvancedCache().withFlags(Flag.FORCE_WRITE_LOCK).get(key);
} finally {
// Even if the remote lock failed, this will remove the transaction
tm1.commit();
}
return null;
});
// The prepare command is replicated to cache c1, and it blocks in the DelayInterceptor
di3.waitUntilBlocked(1);
// Kill c3
killMember(2);
waitForNoRebalance(c1, c2);
// Check that the lock succeeded
f.get(10, SECONDS);
// Unblock the remote command on c3 - shouldn't make any difference
di3.unblock(1);
}
private class DelayInterceptor extends BaseCustomInterceptor {
private final AtomicInteger counter = new AtomicInteger(0);
private final CheckPoint checkPoint = new CheckPoint();
private final Class<?> commandToBlock;
public DelayInterceptor(Class<?> commandToBlock) {
this.commandToBlock = commandToBlock;
}
public int getCounter() {
return counter.get();
}
public void waitUntilBlocked(int count) throws TimeoutException, InterruptedException {
String event = checkPoint.peek(5, SECONDS, "blocked_" + count + "_on_" + cache);
assertEquals("blocked_" + count + "_on_" + cache, event);
}
public void unblock(int count) throws InterruptedException, TimeoutException, BrokenBarrierException {
log.tracef("Unblocking command on cache %s", cache);
checkPoint.awaitStrict("blocked_" + count + "_on_" + cache, 5, SECONDS);
checkPoint.trigger("resume_" + count + "_on_" + cache);
}
@Override
public Object visitPutKeyValueCommand(InvocationContext ctx, PutKeyValueCommand command)
throws Throwable {
Object result = super.visitPutKeyValueCommand(ctx, command);
if (!ctx.isInTxScope() && !command.hasAnyFlag(FlagBitSets.PUT_FOR_STATE_TRANSFER)) {
doBlock(ctx, command);
}
return result;
}
@Override
public Object visitLockControlCommand(TxInvocationContext ctx, LockControlCommand command)
throws Throwable {
Object result = super.visitLockControlCommand(ctx, command);
if (!ctx.getCacheTransaction().isFromStateTransfer()) {
doBlock(ctx, command);
}
return result;
}
@Override
public Object visitPrepareCommand(TxInvocationContext ctx, PrepareCommand command) throws Throwable {
Object result = super.visitPrepareCommand(ctx, command);
if (!ctx.getCacheTransaction().isFromStateTransfer()) {
doBlock(ctx, command);
}
return result;
}
@Override
public Object visitCommitCommand(TxInvocationContext ctx, CommitCommand command) throws Throwable {
Object result = super.visitCommitCommand(ctx, command);
if (!ctx.getCacheTransaction().isFromStateTransfer()) {
doBlock(ctx, command);
}
return result;
}
private void doBlock(InvocationContext ctx, ReplicableCommand command)
throws InterruptedException, TimeoutException {
if (commandToBlock != command.getClass())
return;
log.tracef("Delaying command %s originating from %s", command, ctx.getOrigin());
Integer myCount = counter.incrementAndGet();
checkPoint.trigger("blocked_" + myCount + "_on_" + cache);
checkPoint.awaitStrict("resume_" + myCount + "_on_" + cache, 15, SECONDS);
log.tracef("Command unblocked: %s", command);
}
@Override
public String toString() {
return "DelayInterceptor{counter=" + counter + "}";
}
}
}