package org.infinispan.distribution.rehash;
import org.infinispan.AdvancedCache;
import org.infinispan.Cache;
import org.infinispan.commands.VisitableCommand;
import org.infinispan.commands.read.GetKeyValueCommand;
import org.infinispan.commands.write.PutKeyValueCommand;
import org.infinispan.commands.write.RemoveCommand;
import org.infinispan.commands.write.ReplaceCommand;
import org.infinispan.commons.api.BasicCacheContainer;
import org.infinispan.configuration.cache.CacheMode;
import org.infinispan.configuration.cache.ConfigurationBuilder;
import org.infinispan.context.Flag;
import org.infinispan.distribution.BlockingInterceptor;
import org.infinispan.distribution.MagicKey;
import org.infinispan.interceptors.distribution.NonTxDistributionInterceptor;
import org.infinispan.remoting.rpc.RpcManager;
import org.infinispan.statetransfer.StateResponseCommand;
import org.infinispan.statetransfer.StateTransferInterceptor;
import org.infinispan.test.MultipleCacheManagersTest;
import org.infinispan.test.TestingUtil;
import org.infinispan.test.fwk.CleanupAfterMethod;
import org.infinispan.transaction.TransactionMode;
import org.infinispan.tx.dld.ControlledRpcManager;
import org.testng.annotations.Test;
import java.util.concurrent.Callable;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import static org.testng.AssertJUnit.assertEquals;
/**
* Test that a joiner that became a backup owner for a key does not check the previous value when doing a conditional
* write. Also check that if executing a write command during state transfer, it doesn't perform a remote get to obtain
* the previous value from one of the readCH owners.
*
* @author Dan Berindei
*/
@Test(groups = "functional", testName = "distribution.rehash.NonTxJoinerBecomingBackupOwnerTest")
@CleanupAfterMethod
public class NonTxJoinerBecomingBackupOwnerTest extends MultipleCacheManagersTest {
private static final String CACHE_NAME = BasicCacheContainer.DEFAULT_CACHE_NAME;
private static enum Operation {
PUT(PutKeyValueCommand.class, "v1", null, null),
PUT_IF_ABSENT(PutKeyValueCommand.class, "v1", null, null),
REPLACE(ReplaceCommand.class, "v1", "v0", "v0"),
REPLACE_EXACT(ReplaceCommand.class, "v1", "v0", true),
REMOVE(RemoveCommand.class, null, "v0", "v0"),
REMOVE_EXACT(RemoveCommand.class, null, "v0", true);
private final Class<? extends VisitableCommand> commandClass;
private final Object value;
private final Object previousValue;
private final Object returnValue;
Operation(Class<? extends VisitableCommand> commandClass, Object value, Object previousValue,
Object returnValue) {
this.commandClass = commandClass;
this.value = value;
this.previousValue = previousValue;
this.returnValue = returnValue;
}
private Class<? extends VisitableCommand> getCommandClass() {
return commandClass;
}
private Object getValue() {
return value;
}
private Object getPreviousValue() {
return previousValue;
}
private Object getReturnValue() {
return returnValue;
}
private Object perform(AdvancedCache<Object, Object> cache0, MagicKey key) {
switch (this) {
case PUT:
return cache0.put(key, getValue());
case PUT_IF_ABSENT:
return cache0.putIfAbsent(key, getValue());
case REPLACE:
return cache0.replace(key, getValue());
case REPLACE_EXACT:
return cache0.replace(key, getPreviousValue(), getValue());
case REMOVE:
return cache0.remove(key);
case REMOVE_EXACT:
return cache0.remove(key, getPreviousValue());
default:
throw new IllegalArgumentException("Unsupported operation: " + this);
}
}
}
@Override
protected void createCacheManagers() throws Throwable {
ConfigurationBuilder c = getConfigurationBuilder();
addClusterEnabledCacheManager(c);
addClusterEnabledCacheManager(c);
waitForClusterToForm();
}
private ConfigurationBuilder getConfigurationBuilder() {
ConfigurationBuilder c = new ConfigurationBuilder();
c.clustering().cacheMode(CacheMode.DIST_SYNC);
c.transaction().transactionMode(TransactionMode.NON_TRANSACTIONAL);
return c;
}
public void testBackupOwnerJoiningDuringPut() throws Exception {
doTest(Operation.PUT);
}
public void testBackupOwnerJoiningDuringPutIfAbsent() throws Exception {
doTest(Operation.PUT_IF_ABSENT);
}
public void testBackupOwnerJoiningDuringReplace() throws Exception {
doTest(Operation.REPLACE);
}
public void testBackupOwnerJoiningDuringReplaceWithPreviousValue() throws Exception {
doTest(Operation.REPLACE_EXACT);
}
public void testBackupOwnerJoiningDuringRemove() throws Exception {
doTest(Operation.REMOVE);
}
public void testBackupOwnerJoiningDuringRemoveWithPreviousValue() throws Exception {
doTest(Operation.REMOVE_EXACT);
}
private void doTest(final Operation op) throws Exception {
final AdvancedCache<Object, Object> cache0 = advancedCache(0);
final AdvancedCache<Object, Object> cache1 = advancedCache(1);
// Install a ControlledRpcManager on cache1 so that we know when it finished sending the state
ControlledRpcManager blockingRpcManager1 = blockStateResponseCommand(cache1);
// Add a new member, but don't start the cache yet
ConfigurationBuilder c = getConfigurationBuilder();
c.clustering().stateTransfer().awaitInitialTransfer(false);
addClusterEnabledCacheManager(c);
// Start the cache and wait until it's a member in the write CH
log.tracef("Starting the cache on the joiner");
final AdvancedCache<Object,Object> cache2 = advancedCache(2);
// Wait for the write CH to contain the joiner everywhere
eventually(new Condition() {
@Override
public boolean isSatisfied() throws Exception {
return cache0.getRpcManager().getMembers().size() == 3 &&
cache1.getRpcManager().getMembers().size() == 3 &&
cache2.getRpcManager().getMembers().size() == 3;
}
});
// Every ClusteredGetKeyValueCommand will be blocked before returning on cache0
CyclicBarrier beforeCache0Barrier = new CyclicBarrier(2);
BlockingInterceptor blockingInterceptor0 = new BlockingInterceptor(beforeCache0Barrier,
GetKeyValueCommand.class, false);
cache0.addInterceptorBefore(blockingInterceptor0, StateTransferInterceptor.class);
// Every PutKeyValueCommand will be blocked before returning on cache1
CyclicBarrier afterCache1Barrier = new CyclicBarrier(2);
BlockingInterceptor blockingInterceptor1 = new BlockingInterceptor(afterCache1Barrier,
op.getCommandClass(), false);
cache1.addInterceptorBefore(blockingInterceptor1, StateTransferInterceptor.class);
// Every PutKeyValueCommand will be blocked before reaching the distribution interceptor on cache2
CyclicBarrier beforeCache2Barrier = new CyclicBarrier(2);
BlockingInterceptor blockingInterceptor2 = new BlockingInterceptor(beforeCache2Barrier,
op.getCommandClass(), true);
cache2.addInterceptorBefore(blockingInterceptor2, NonTxDistributionInterceptor.class);
// Wait for cache1 to send the StateResponseCommand to cache1, but keep it blocked
// We only block the StateResponseCommand on cache1, because that's the node cache2 will ask for the magic key
blockingRpcManager1.waitForCommandToBlock();
final MagicKey key = getKeyForCache2();
// Prepare for replace: put a previous value in cache0 and cache1
if (op.getPreviousValue() != null) {
cache0.withFlags(Flag.CACHE_MODE_LOCAL).put(key, op.getPreviousValue());
cache1.withFlags(Flag.CACHE_MODE_LOCAL).put(key, op.getPreviousValue());
}
// Put from cache0 with cache0 as primary owner, cache2 will become a backup owner for the retry
// The put command will be blocked on cache1 and cache2.
Future<Object> future = fork(new Callable<Object>() {
@Override
public Object call() throws Exception {
return op.perform(cache0, key);
}
});
// Wait for the value to be written on cache1
afterCache1Barrier.await(10, TimeUnit.SECONDS);
afterCache1Barrier.await(10, TimeUnit.SECONDS);
// Allow the command to proceed on cache2
beforeCache2Barrier.await(10, TimeUnit.SECONDS);
beforeCache2Barrier.await(10, TimeUnit.SECONDS);
// Check that the put command didn't fail
Object result = future.get(10, TimeUnit.SECONDS);
assertEquals(op.getReturnValue(), result);
log.tracef("%s operation is done", op);
// Stop blocking get commands on cache0
// beforeCache0Barrier.await(10, TimeUnit.SECONDS);
// beforeCache0Barrier.await(10, TimeUnit.SECONDS);
cache0.removeInterceptor(BlockingInterceptor.class);
// Allow cache2 to receive the StateResponseCommand from cache1 and the cluster to finish state transfer
blockingRpcManager1.stopBlocking();
// Wait for the topology to change everywhere
TestingUtil.waitForRehashToComplete(cache0, cache1, cache2);
// Check the value on all the nodes
assertEquals(op.getValue(), cache0.get(key));
assertEquals(op.getValue(), cache1.get(key));
assertEquals(op.getValue(), cache2.get(key));
}
private MagicKey getKeyForCache2() {
return new MagicKey(cache(0), cache(1), cache(2));
}
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;
}
}