package org.infinispan.distribution.rehash;
import org.infinispan.AdvancedCache;
import org.infinispan.Cache;
import org.infinispan.configuration.cache.CacheMode;
import org.infinispan.configuration.cache.ConfigurationBuilder;
import org.infinispan.container.entries.CacheEntry;
import org.infinispan.container.versioning.EntryVersion;
import org.infinispan.context.InvocationContext;
import org.infinispan.interceptors.locking.ClusteringDependentLogic;
import org.infinispan.remoting.rpc.RpcManager;
import org.infinispan.remoting.transport.Address;
import org.infinispan.statetransfer.StateResponseCommand;
import org.infinispan.test.MultipleCacheManagersTest;
import org.infinispan.test.TestingUtil;
import org.infinispan.test.fwk.CheckPoint;
import org.infinispan.transaction.TransactionMode;
import org.infinispan.tx.dld.ControlledRpcManager;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import org.testng.annotations.Test;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.anyBoolean;
import static org.mockito.Matchers.anyInt;
import static org.mockito.Matchers.anyString;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.spy;
import static org.testng.AssertJUnit.assertEquals;
import static org.testng.AssertJUnit.assertFalse;
import static org.testng.AssertJUnit.assertTrue;
/**
* Tests that state transfer can't overwrite a value written by a command during state transfer.
* See https://issues.jboss.org/browse/ISPN-3443
*
* @author Dan Berindei
* @since 6.0
*/
@Test(groups = "functional", testName = "distribution.rehash.NonTxStateTransferOverwritingValue2Test")
public class NonTxStateTransferOverwritingValue2Test extends MultipleCacheManagersTest {
{
cleanup = CleanupPhase.AFTER_METHOD;
}
@Override
protected void createCacheManagers() throws Throwable {
ConfigurationBuilder c = getConfigurationBuilder();
addClusterEnabledCacheManager(c);
waitForClusterToForm();
}
protected ConfigurationBuilder getConfigurationBuilder() {
ConfigurationBuilder c = new ConfigurationBuilder();
c.clustering().cacheMode(CacheMode.DIST_SYNC);
c.transaction().transactionMode(TransactionMode.NON_TRANSACTIONAL);
return c;
}
public void testBackupOwnerJoiningDuringPutOverwrite() throws Exception {
// Need a previous value for this test, so we can't test PUT_CREATE
doTest(TestWriteOperation.PUT_OVERWRITE);
}
public void testBackupOwnerJoiningDuringReplace() throws Exception {
doTest(TestWriteOperation.REPLACE);
}
public void testBackupOwnerJoiningDuringReplaceWithPreviousValue() throws Exception {
doTest(TestWriteOperation.REPLACE_EXACT);
}
public void testBackupOwnerJoiningDuringRemove() throws Exception {
doTest(TestWriteOperation.REMOVE);
}
public void testBackupOwnerJoiningDuringRemoveWithPreviousValue() throws Exception {
doTest(TestWriteOperation.REMOVE_EXACT);
}
private void doTest(final TestWriteOperation op) throws Exception {
// Test scenario:
// cache0 is the only member in the cluster, cache1 joins
// Key k is in the cache, and is transferred to cache1
// A user operation/tx also modifies key k
// Even if both state transfer and the user tx try to commit the entry for k concurrently,
// the value of k at the end should be the one set by the user tx.
final AdvancedCache<Object, Object> cache0 = advancedCache(0);
final String key = "key";
// Prepare for replace/remove: put a previous value in cache0
final Object previousValue = op.getPreviousValue();
if (previousValue != null) {
cache0.put(key, previousValue);
assertEquals(previousValue, cache0.get(key));
log.tracef("Previous value inserted: %s = %s", key, previousValue);
}
int preJoinTopologyId = cache0.getComponentRegistry().getStateTransferManager().getCacheTopology().getTopologyId();
// Block any state response commands on cache0
// So that we can install the spy ClusteringDependentLogic on cache1 before state transfer is applied
final CheckPoint checkPoint = new CheckPoint();
ControlledRpcManager blockingRpcManager0 = blockStateResponseCommand(cache0);
// Start the joiner
log.tracef("Starting the cache on the joiner");
ConfigurationBuilder c = getConfigurationBuilder();
c.clustering().stateTransfer().awaitInitialTransfer(false);
addClusterEnabledCacheManager(c);
final AdvancedCache<Object,Object> cache1 = advancedCache(1);
// Wait for the write CH to contain the joiner everywhere
eventually(new Condition() {
@Override
public boolean isSatisfied() throws Exception {
return cache0.getRpcManager().getMembers().size() == 2 &&
cache1.getRpcManager().getMembers().size() == 2;
}
});
// Every PutKeyValueCommand will be blocked before committing the entry on cache1
blockEntryCommit(checkPoint, cache1);
// Wait for cache0 to collect the state to send to cache1 (including our previous value).
blockingRpcManager0.waitForCommandToBlock();
// Allow the state to be applied on cache1 (writing the old value for our entry)
blockingRpcManager0.stopBlocking();
// Wait for state transfer tx/operation to call commitEntry on cache1
checkPoint.awaitStrict("pre_commit_entry_" + key + "_from_" + null, 5, SECONDS);
// Put/Replace/Remove from cache0 with cache0 as primary owner, cache1 will become a backup owner for the retry
// The put command will be blocked on cache1 just before committing the entry.
Future<Object> future = fork(new Callable<Object>() {
@Override
public Object call() throws Exception {
return op.perform(cache0, key);
}
});
// Wait for the user tx/operation to call commitEntry on cache1
boolean blocked = checkPoint.peek(3, SECONDS, "pre_commit_entry_" + key + "_from_" + address(0)) == null;
assertTrue(blocked);
// Allow the command to commit (though it will still be blocked)
// Trigger the event twice because the command may be retried (if the rebalance finishes first)
checkPoint.trigger("resume_commit_entry_" + key + "_from_" + address(0), 2);
// Allow state transfer to commit
checkPoint.trigger("resume_commit_entry_" + key + "_from_" + null);
// Wait for both state transfer and the command to commit
checkPoint.awaitStrict("post_commit_entry_" + key + "_from_" + null, 10, SECONDS);
checkPoint.awaitStrict("post_commit_entry_" + key + "_from_" + address(0), 10, SECONDS);
// Wait for the command to finish and check that it didn't fail
Object result = future.get(10, TimeUnit.SECONDS);
assertEquals(op.getReturnValue(), result);
log.tracef("%s operation is done", op);
TestingUtil.waitForRehashToComplete(cache0, cache1);
// Check the value on all the nodes
assertEquals(op.getValue(), cache0.get(key));
assertEquals(op.getValue(), cache1.get(key));
}
private void blockEntryCommit(final CheckPoint checkPoint, AdvancedCache<Object, Object> cache) {
ClusteringDependentLogic cdl1 = cache.getComponentRegistry().getComponent(ClusteringDependentLogic.class);
ClusteringDependentLogic spyCdl1 = spy(cdl1);
TestingUtil.replaceComponent(cache, ClusteringDependentLogic.class, spyCdl1, true);
doAnswer(new Answer() {
@Override
public Object answer(InvocationOnMock invocation) throws Throwable {
Object[] arguments = invocation.getArguments();
CacheEntry entry = (CacheEntry) arguments[0];
Object key = entry.getKey();
InvocationContext ctx = (InvocationContext) arguments[3];
Address source = ctx.getOrigin();
checkPoint.trigger("pre_commit_entry_" + key + "_from_" + source);
checkPoint.awaitStrict("resume_commit_entry_" + key + "_from_" + source, 10, SECONDS);
Object result = invocation.callRealMethod();
checkPoint.trigger("post_commit_entry_" + key + "_from_" + source);
return result;
}
}).when(spyCdl1).commitEntry(any(CacheEntry.class), any(EntryVersion.class), anyBoolean(),
any(InvocationContext.class));
}
private ControlledRpcManager blockStateResponseCommand(final Cache cache) throws InterruptedException {
RpcManager rpcManager = TestingUtil.extractComponent(cache, RpcManager.class);
ControlledRpcManager controlledRpcManager = new ControlledRpcManager(rpcManager);
controlledRpcManager.blockBefore(StateResponseCommand.class);
TestingUtil.replaceComponent(cache, RpcManager.class, controlledRpcManager, true);
return controlledRpcManager;
}
}