package org.infinispan.statetransfer;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.infinispan.test.TestingUtil.extractComponent;
import static org.infinispan.test.TestingUtil.findInterceptor;
import static org.infinispan.test.TestingUtil.waitForNoRebalance;
import static org.testng.AssertJUnit.assertEquals;
import static org.testng.AssertJUnit.assertNull;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicInteger;
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.InvocationContext;
import org.infinispan.context.impl.FlagBitSets;
import org.infinispan.context.impl.TxInvocationContext;
import org.infinispan.interceptors.base.BaseCustomInterceptor;
import org.infinispan.interceptors.impl.EntryWrappingInterceptor;
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.topology.CacheTopology;
import org.infinispan.util.ReplicatedControlledConsistentHashFactory;
import org.testng.annotations.Test;
/**
* Test that commands are properly forwarded during/after state transfer.
*
* @author Dan Berindei
* @since 5.2
*/
@Test(groups = "functional", testName = "statetransfer.ReplCommandForwardingTest")
@CleanupAfterMethod
public class ReplCommandForwardingTest extends MultipleCacheManagersTest {
@Override
protected void createCacheManagers() {
// do nothing, each test will create its own cache managers
}
private ConfigurationBuilder buildConfig(Class<?> commandToBlock) {
ConfigurationBuilder configurationBuilder = getDefaultClusteredCacheConfig( CacheMode.REPL_ASYNC, false);
configurationBuilder.clustering().remoteTimeout(15000);
// The coordinator will always be the primary owner
configurationBuilder.clustering().hash().numSegments(1).consistentHashFactory(new ReplicatedControlledConsistentHashFactory(0));
configurationBuilder.clustering().stateTransfer().fetchInMemoryState(true);
// We must block after the commit was replicated, but before the entries are committed
configurationBuilder.customInterceptors()
.addInterceptor().after(EntryWrappingInterceptor.class).interceptor(new DelayInterceptor(commandToBlock));
return configurationBuilder;
}
public void testForwardToJoinerNonTransactional() throws Exception {
EmbeddedCacheManager cm1 = addClusterEnabledCacheManager(buildConfig(PutKeyValueCommand.class));
final Cache<Object, Object> c1 = cm1.getCache();
DelayInterceptor di1 = findInterceptor(c1, DelayInterceptor.class);
int initialTopologyId = extractComponent(c1, StateTransferManager.class).getCacheTopology().getTopologyId();
EmbeddedCacheManager cm2 = addClusterEnabledCacheManager(buildConfig(PutKeyValueCommand.class));
Cache<Object, Object> c2 = cm2.getCache();
DelayInterceptor di2 = findInterceptor(c2, DelayInterceptor.class);
waitForStateTransfer(initialTopologyId + 4, c1, c2);
Future<Object> f = fork(() -> {
log.tracef("Initiating a put command on %s", c1);
c1.put("k", "v");
return null;
});
// The put command is replicated to cache c2, and it blocks in the DelayInterceptor on both c1 and c2.
di1.waitUntilBlocked(1);
di2.waitUntilBlocked(1);
// c3 joins, topology id changes
EmbeddedCacheManager cm3 = addClusterEnabledCacheManager(buildConfig(PutKeyValueCommand.class));
Cache<Object, Object> c3 = cm3.getCache();
DelayInterceptor di3 = findInterceptor(c3, DelayInterceptor.class);
waitForStateTransfer(initialTopologyId + 8, c1, c2, c3);
// Unblock the replicated command on c2 and c1
// Neither cache will forward the command to c3
di2.unblock(1);
di1.unblock(1);
Thread.sleep(2000);
assertEquals("The command shouldn't have been forwarded to " + c3, 0, di3.getCounter());
log.tracef("Waiting for the put command to finish on %s", c1);
Object retval = f.get(10, SECONDS);
log.tracef("Put command finished on %s", c1);
assertNull(retval);
// 1 direct invocation
assertEquals(1, di1.getCounter());
// 1 from c1
assertEquals(1, di2.getCounter());
// 0 invocations
assertEquals(0, di3.getCounter());
}
private void waitForStateTransfer(int expectedTopologyId, Cache... caches) {
waitForNoRebalance(caches);
for (Cache c : caches) {
CacheTopology cacheTopology = extractComponent(c, StateTransferManager.class).getCacheTopology();
assertEquals(String.format("Wrong topology on cache %s, expected %d and got %s", c, expectedTopologyId,
cacheTopology), cacheTopology.getTopologyId(), expectedTopologyId);
}
}
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 + "}";
}
}
}