package org.infinispan.interceptors.totalorder;
import java.util.Collection;
import java.util.concurrent.CompletableFuture;
import org.infinispan.commands.tx.CommitCommand;
import org.infinispan.commands.tx.PrepareCommand;
import org.infinispan.commands.tx.RollbackCommand;
import org.infinispan.commands.tx.VersionedPrepareCommand;
import org.infinispan.configuration.cache.Configurations;
import org.infinispan.context.impl.TxInvocationContext;
import org.infinispan.factories.annotations.Start;
import org.infinispan.interceptors.distribution.VersionedDistributionInterceptor;
import org.infinispan.remoting.transport.Address;
import org.infinispan.util.concurrent.CompletableFutures;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
/**
* This interceptor is used in total order in distributed mode when the write skew check is enabled. After sending the
* prepare through TOA (Total Order Anycast), it blocks the execution thread until the transaction outcome is known
* (i.e., the write skew check passes in all keys owners)
*
* @author Pedro Ruivo
*/
public class TotalOrderVersionedDistributionInterceptor extends VersionedDistributionInterceptor {
private static final Log log = LogFactory.getLog(TotalOrderVersionedDistributionInterceptor.class);
private static final boolean trace = log.isTraceEnabled();
private boolean onePhaseTotalOrderCommit;
@Start
public void start() {
onePhaseTotalOrderCommit = Configurations.isOnePhaseTotalOrderCommit(cacheConfiguration);
}
@Override
public Object visitRollbackCommand(TxInvocationContext ctx, RollbackCommand command) throws Throwable {
if (onePhaseTotalOrderCommit || !ctx.hasModifications() ||
!shouldTotalOrderRollbackBeInvokedRemotely(ctx)) {
return invokeNext(ctx, command);
}
totalOrderTxRollback(ctx);
return super.visitRollbackCommand(ctx, command);
}
@Override
public Object visitCommitCommand(TxInvocationContext ctx, CommitCommand command) throws Throwable {
if (onePhaseTotalOrderCommit || !ctx.hasModifications()) {
return invokeNext(ctx, command);
}
totalOrderTxCommit(ctx);
return super.visitCommitCommand(ctx, command);
}
@Override
protected CompletableFuture<Object> prepareOnAffectedNodes(TxInvocationContext<?> ctx, PrepareCommand command, Collection<Address> recipients) {
if (trace) {
log.tracef("Total Order Anycast transaction %s with Total Order", command.getGlobalTransaction().globalId());
}
if (!ctx.hasModifications()) {
return CompletableFutures.completedNull();
}
if (!ctx.isOriginLocal()) {
throw new IllegalStateException("Expected a local context while TO-Anycast prepare command");
}
if (!(command instanceof VersionedPrepareCommand)) {
throw new IllegalStateException("Expected a Versioned Prepare Command in version aware component");
}
return totalOrderPrepare(ctx, command, recipients);
}
@Override
protected Log getLog() {
return log;
}
}