org.infinispan.client.hotrod.impl.transaction.SyncModeTransactionTable Maven / Gradle / Ivy
package org.infinispan.client.hotrod.impl.transaction;
import static org.infinispan.commons.tx.Util.transactionStatusToString;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentSkipListMap;
import java.util.function.Consumer;
import java.util.function.Function;
import javax.transaction.RollbackException;
import javax.transaction.Status;
import javax.transaction.Synchronization;
import javax.transaction.SystemException;
import javax.transaction.Transaction;
import javax.transaction.xa.XAResource;
import org.infinispan.client.hotrod.RemoteCache;
import org.infinispan.client.hotrod.logging.Log;
import org.infinispan.client.hotrod.logging.LogFactory;
import org.infinispan.client.hotrod.transaction.manager.RemoteXid;
import org.infinispan.commons.CacheException;
import org.infinispan.commons.util.Util;
/**
* A {@link TransactionTable} that registers the {@link RemoteCache} as a {@link Synchronization} in the transaction.
*
* Only a single {@link Synchronization} is registered even if multiple {@link RemoteCache}s interact with the same
* transaction.
*
* When more than one {@link RemoteCache} is involved in the {@link Transaction}, the prepare, commit and rollback
* requests are sent sequential and they are ordered by the {@link RemoteCache}'s name.
*
* If a {@link RemoteCache} is read-only, the commit/rollback isn't invoked.
*
* @author Pedro Ruivo
* @since 9.3
*/
public class SyncModeTransactionTable extends AbstractTransactionTable {
private static final Log log = LogFactory.getLog(SyncModeTransactionTable.class, Log.class);
private final Map registeredTransactions = new ConcurrentHashMap<>();
private final UUID uuid = Util.threadLocalRandomUUID();
private final Consumer cleanup = registeredTransactions::remove;
private final Function constructor = this::createSynchronizationAdapter;
public SyncModeTransactionTable(long timeout) {
super(timeout);
}
@Override
public TransactionContext enlist(TransactionalRemoteCacheImpl txRemoteCache, Transaction tx) {
assertStartedAndReturnFactory();
//registers a synchronization if it isn't done yet.
SynchronizationAdapter adapter = registeredTransactions.computeIfAbsent(tx, constructor);
//registers the cache.
TransactionContext context = adapter.registerCache(txRemoteCache);
if (log.isTraceEnabled()) {
log.tracef("Xid=%s retrieving context: %s", adapter.xid, context);
}
return context;
}
/**
* Creates and registers the {@link SynchronizationAdapter} in the {@link Transaction}.
*/
private SynchronizationAdapter createSynchronizationAdapter(Transaction transaction) {
SynchronizationAdapter adapter = new SynchronizationAdapter(transaction, RemoteXid.create(uuid));
try {
transaction.registerSynchronization(adapter);
} catch (RollbackException | SystemException e) {
throw new CacheException(e);
}
if (log.isTraceEnabled()) {
log.tracef("Registered synchronization for transaction %s. Sync=%s", transaction, adapter);
}
return adapter;
}
private class SynchronizationAdapter implements Synchronization {
private final Map> registeredCaches = new ConcurrentSkipListMap<>();
private final Transaction transaction;
private final RemoteXid xid;
private SynchronizationAdapter(Transaction transaction, RemoteXid xid) {
this.transaction = transaction;
this.xid = xid;
}
@Override
public String toString() {
return "SynchronizationAdapter{" +
"registeredCaches=" + registeredCaches.keySet() +
", transaction=" + transaction +
", xid=" + xid +
'}';
}
@Override
public void beforeCompletion() {
if (log.isTraceEnabled()) {
log.tracef("BeforeCompletion(xid=%s, remote-caches=%s)", xid, registeredCaches.keySet());
}
if (isMarkedRollback()) {
return;
}
for (TransactionContext txContext : registeredCaches.values()) {
switch (txContext.prepareContext(xid, false, getTimeout())) {
case XAResource.XA_OK:
case XAResource.XA_RDONLY:
break; //read only tx.
case Integer.MIN_VALUE:
//signals a marshaller error of key or value. the server wasn't contacted
markAsRollback();
return;
default:
markAsRollback();
return;
}
}
}
@Override
public void afterCompletion(int status) {
if (log.isTraceEnabled()) {
log.tracef("AfterCompletion(xid=%s, status=%s, remote-caches=%s)", xid, transactionStatusToString(status),
registeredCaches.keySet());
}
//the server commits everything when the first request arrives.
try {
boolean commit = status == Status.STATUS_COMMITTED;
completeTransaction(xid, commit);
} finally {
forgetTransaction(xid);
cleanup.accept(transaction);
}
}
private void markAsRollback() {
try {
transaction.setRollbackOnly();
} catch (SystemException e) {
log.debug("Exception in markAsRollback", e);
}
}
private boolean isMarkedRollback() {
try {
return transaction.getStatus() == Status.STATUS_MARKED_ROLLBACK;
} catch (SystemException e) {
log.debug("Exception in isMarkedRollback", e);
//lets assume not.
return false;
}
}
private TransactionContext registerCache(TransactionalRemoteCacheImpl txRemoteCache) {
//noinspection unchecked
return (TransactionContext) registeredCaches
.computeIfAbsent(txRemoteCache.getName(), s -> createTxContext(txRemoteCache));
}
private TransactionContext createTxContext(TransactionalRemoteCacheImpl remoteCache) {
if (log.isTraceEnabled()) {
log.tracef("Registering remote cache '%s' for transaction xid=%s", remoteCache.getName(), xid);
}
return new TransactionContext<>(remoteCache.keyMarshaller(), remoteCache.valueMarshaller(),
remoteCache.getOperationsFactory(), remoteCache.getName(), false);
}
}
}