org.infinispan.client.hotrod.impl.transaction.TransactionContext Maven / Gradle / Ivy
package org.infinispan.client.hotrod.impl.transaction;
import static org.infinispan.client.hotrod.logging.Log.HOTROD;
import static org.infinispan.commons.util.Util.toStr;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import javax.transaction.Transaction;
import javax.transaction.xa.XAException;
import javax.transaction.xa.XAResource;
import javax.transaction.xa.Xid;
import org.infinispan.client.hotrod.MetadataValue;
import org.infinispan.client.hotrod.impl.operations.OperationsFactory;
import org.infinispan.client.hotrod.impl.transaction.entry.Modification;
import org.infinispan.client.hotrod.impl.transaction.entry.TransactionEntry;
import org.infinispan.client.hotrod.impl.transaction.operations.PrepareTransactionOperation;
import org.infinispan.client.hotrod.logging.Log;
import org.infinispan.client.hotrod.logging.LogFactory;
import org.infinispan.commons.util.ByRef;
import org.infinispan.commons.util.CloseableIterator;
import org.infinispan.commons.util.CloseableIteratorSet;
/**
* A context with the keys involved in a {@link Transaction}.
*
* There is a single context for each ({@link TransactionalRemoteCacheImpl}, {@link Transaction}) pair.
*
* It keeps the keys read and written in order to maintain the transactions isolated.
*
* @author Pedro Ruivo
* @since 9.3
*/
public class TransactionContext {
private static final Log log = LogFactory.getLog(TransactionContext.class, Log.class);
private final Map, TransactionEntry> entries;
private final Function keyMarshaller;
private final Function valueMarshaller;
private final OperationsFactory operationsFactory;
private final String cacheName;
private final boolean recoverable;
TransactionContext(Function keyMarshaller, Function valueMarshaller,
OperationsFactory operationsFactory, String cacheName, boolean recoveryEnabled) {
this.keyMarshaller = keyMarshaller;
this.valueMarshaller = valueMarshaller;
this.operationsFactory = operationsFactory;
this.cacheName = cacheName;
this.recoverable = recoveryEnabled;
entries = new ConcurrentHashMap<>();
}
@Override
public String toString() {
return "TransactionContext{" +
"cacheName='" + cacheName + '\'' +
", context-size=" + entries.size() + " (entries)" +
'}';
}
CompletableFuture containsKey(Object key, Function> remoteValueSupplier) {
CompletableFuture result = new CompletableFuture<>();
//noinspection unchecked
entries.compute(wrap((K) key), (wKey, entry) -> {
if (entry == null) {
entry = createEntryFromRemote(wKey.key, remoteValueSupplier);
}
result.complete(!entry.isNonExists());
return entry;
});
return result;
}
boolean containsValue(Object value, Supplier>> iteratorSupplier,
Function> remoteValueSupplier) {
boolean found = entries.values().stream()
.map(TransactionEntry::getValue)
.filter(Objects::nonNull)
.anyMatch(v -> Objects.deepEquals(v, value));
return found || searchValue(value, iteratorSupplier.get(), remoteValueSupplier);
}
CompletableFuture compute(K key, Function, T> function) {
CompletableFuture future = new CompletableFuture<>();
entries.compute(wrap(key), (wKey, entry) -> {
if (entry == null) {
entry = TransactionEntry.notReadEntry(wKey.key);
}
if (log.isTraceEnabled()) {
log.tracef("Compute key (%s). Before=%s", wKey, entry);
}
T result = function.apply(entry);
future.complete(result);
if (log.isTraceEnabled()) {
log.tracef("Compute key (%s). After=%s (result=%s)", wKey, entry, result);
}
return entry;
});
return future;
}
CompletableFuture compute(K key, Function, T> function,
Function> remoteValueSupplier) {
CompletableFuture future = new CompletableFuture<>();
entries.compute(wrap(key), (wKey, entry) -> {
if (entry == null) {
entry = createEntryFromRemote(wKey.key, remoteValueSupplier);
if (log.isTraceEnabled()) {
log.tracef("Fetched key (%s) from remote. Entry=%s", wKey, entry);
}
}
if (log.isTraceEnabled()) {
log.tracef("Compute key (%s). Before=%s", wKey, entry);
}
T result = function.apply(entry);
future.complete(result);
if (log.isTraceEnabled()) {
log.tracef("Compute key (%s). After=%s (result=%s)", wKey, entry, result);
}
return entry;
});
return future;
}
boolean isReadWrite() {
return entries.values().stream().anyMatch(TransactionEntry::isModified);
}
T computeSync(K key, Function, T> function,
Function> remoteValueSupplier) {
ByRef ref = new ByRef<>(null);
entries.compute(wrap(key), (wKey, entry) -> {
if (entry == null) {
entry = createEntryFromRemote(wKey.key, remoteValueSupplier);
if (log.isTraceEnabled()) {
log.tracef("Fetched key (%s) from remote. Entry=%s", wKey, entry);
}
}
if (log.isTraceEnabled()) {
log.tracef("Compute key (%s). Before=%s", wKey, entry);
}
T result = function.apply(entry);
ref.set(result);
if (log.isTraceEnabled()) {
log.tracef("Compute key (%s). After=%s (result=%s)", wKey, entry, result);
}
return entry;
});
return ref.get();
}
/**
* Prepares the {@link Transaction} in the server and returns the {@link XAResource} code.
*
* A special value {@link Integer#MIN_VALUE} is used to signal an error before contacting the server (for example, it
* wasn't able to marshall the key/value)
*/
int prepareContext(Xid xid, boolean onePhaseCommit, long timeout) {
PrepareTransactionOperation operation;
List modifications;
try {
modifications = toModification();
if (log.isTraceEnabled()) {
log.tracef("Preparing transaction xid=%s, remote-cache=%s, modification-size=%d", xid, cacheName,
modifications.size());
}
if (modifications.isEmpty()) {
return XAResource.XA_RDONLY;
}
} catch (Exception e) {
return Integer.MIN_VALUE;
}
try {
int xaReturnCode;
do {
operation = operationsFactory
.newPrepareTransactionOperation(xid, onePhaseCommit, modifications, recoverable, timeout);
xaReturnCode = operation.execute().get();
} while (operation.shouldRetry());
return xaReturnCode;
} catch (Exception e) {
HOTROD.exceptionDuringPrepare(xid, e);
return XAException.XA_RBROLLBACK;
}
}
void cleanupEntries() {
entries.clear();
}
private List toModification() {
return entries.values().stream()
.filter(TransactionEntry::isModified)
.map(entry -> entry.toModification(keyMarshaller, valueMarshaller))
.collect(Collectors.toList());
}
private TransactionEntry createEntryFromRemote(K key, Function> remoteValueSupplier) {
MetadataValue remoteValue = remoteValueSupplier.apply(key);
return remoteValue == null ? TransactionEntry.nonExistingEntry(key) : TransactionEntry.read(key, remoteValue);
}
private boolean searchValue(Object value, CloseableIteratorSet> iterator,
Function> remoteValueSupplier) {
try (CloseableIterator> it = iterator.iterator()) {
while (it.hasNext()) {
Map.Entry entry = it.next();
if (!entries.containsKey(wrap(entry.getKey())) && Objects.deepEquals(entry.getValue(), value)) {
ByRef.Boolean result = new ByRef.Boolean(false);
entries.computeIfAbsent(wrap(entry.getKey()), wrappedKey -> {
MetadataValue remoteValue = remoteValueSupplier.apply(wrappedKey.key);
if (Objects.deepEquals(remoteValue.getValue(), value)) {
//value didn't change. store it locally.
result.set(true);
return TransactionEntry.read(wrappedKey.key, remoteValue);
} else {
return null;
}
});
if (result.get()) {
return true;
}
}
}
}
//we iterated over all keys.
return false;
}
private WrappedKey wrap(K key) {
return new WrappedKey<>(key);
}
private static class WrappedKey {
private final K key;
private WrappedKey(K key) {
this.key = key;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
WrappedKey that = (WrappedKey) o;
return Objects.deepEquals(key, that.key);
}
@Override
public int hashCode() {
if (key instanceof Object[]) {
return Arrays.deepHashCode((Object[]) key);
} else if (key instanceof byte[]) {
return Arrays.hashCode((byte[]) key);
} else if (key instanceof short[]) {
return Arrays.hashCode((short[]) key);
} else if (key instanceof int[]) {
return Arrays.hashCode((int[]) key);
} else if (key instanceof long[]) {
return Arrays.hashCode((long[]) key);
} else if (key instanceof char[]) {
return Arrays.hashCode((char[]) key);
} else if (key instanceof float[]) {
return Arrays.hashCode((float[]) key);
} else if (key instanceof double[]) {
return Arrays.hashCode((double[]) key);
} else if (key instanceof boolean[]) {
return Arrays.hashCode((boolean[]) key);
} else {
return Objects.hashCode(key);
}
}
@Override
public String toString() {
return "WrappedKey{" +
"key=" + toStr(key) +
'}';
}
}
}