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ClientListenerRegistry.java
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ClientListenerRegistry.java
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package org.infinispan.server.hotrod;
import static org.infinispan.commons.dataconversion.MediaType.APPLICATION_OBJECT;
import java.lang.annotation.Annotation;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Optional;
import java.util.Queue;
import java.util.Set;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.Executor;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;
import org.infinispan.AdvancedCache;
import org.infinispan.Cache;
import org.infinispan.commons.dataconversion.MediaType;
import org.infinispan.commons.dataconversion.TranscoderMarshallerAdapter;
import org.infinispan.commons.logging.LogFactory;
import org.infinispan.commons.marshall.Marshaller;
import org.infinispan.commons.marshall.WrappedByteArray;
import org.infinispan.commons.util.BloomFilter;
import org.infinispan.commons.util.Util;
import org.infinispan.commons.util.concurrent.CompletableFutures;
import org.infinispan.container.versioning.NumericVersion;
import org.infinispan.marshall.core.EncoderRegistry;
import org.infinispan.metadata.Metadata;
import org.infinispan.notifications.Listener;
import org.infinispan.notifications.cachelistener.annotation.CacheEntryCreated;
import org.infinispan.notifications.cachelistener.annotation.CacheEntryExpired;
import org.infinispan.notifications.cachelistener.annotation.CacheEntryModified;
import org.infinispan.notifications.cachelistener.annotation.CacheEntryRemoved;
import org.infinispan.notifications.cachelistener.event.CacheEntryCreatedEvent;
import org.infinispan.notifications.cachelistener.event.CacheEntryEvent;
import org.infinispan.notifications.cachelistener.event.CacheEntryModifiedEvent;
import org.infinispan.notifications.cachelistener.event.CacheEntryRemovedEvent;
import org.infinispan.notifications.cachelistener.filter.CacheEventConverter;
import org.infinispan.notifications.cachelistener.filter.CacheEventConverterFactory;
import org.infinispan.notifications.cachelistener.filter.CacheEventFilter;
import org.infinispan.notifications.cachelistener.filter.CacheEventFilterConverter;
import org.infinispan.notifications.cachelistener.filter.CacheEventFilterConverterFactory;
import org.infinispan.notifications.cachelistener.filter.CacheEventFilterFactory;
import org.infinispan.notifications.cachelistener.filter.KeyValueFilterConverterAsCacheEventFilterConverter;
import org.infinispan.security.actions.SecurityActions;
import org.infinispan.server.hotrod.logging.Log;
import org.infinispan.util.KeyValuePair;
import io.netty.buffer.ByteBuf;
import io.netty.channel.Channel;
import io.netty.channel.EventLoop;
/**
* @author Galder Zamarreño
*/
class ClientListenerRegistry {
private final EncoderRegistry encoderRegistry;
private final Executor nonBlockingExecutor;
ClientListenerRegistry(EncoderRegistry encoderRegistry, Executor nonBlockingExecutor) {
this.encoderRegistry = encoderRegistry;
this.nonBlockingExecutor = nonBlockingExecutor;
}
private final static Log log = LogFactory.getLog(ClientListenerRegistry.class, Log.class);
private final ConcurrentMap<WrappedByteArray, Object> eventSenders = new ConcurrentHashMap<>();
private final ConcurrentMap<String, CacheEventFilterFactory> cacheEventFilterFactories = new ConcurrentHashMap<>(4, 0.9f, 16);
private final ConcurrentMap<String, CacheEventConverterFactory> cacheEventConverterFactories = new ConcurrentHashMap<>(4, 0.9f, 16);
private final ConcurrentMap<String, CacheEventFilterConverterFactory> cacheEventFilterConverterFactories = new ConcurrentHashMap<>(4, 0.9f, 16);
void setEventMarshaller(Optional<Marshaller> eventMarshaller) {
eventMarshaller.ifPresent(m -> {
TranscoderMarshallerAdapter adapter = new TranscoderMarshallerAdapter(m);
if (encoderRegistry.isConversionSupported(MediaType.APPLICATION_OBJECT, m.mediaType())) {
log.skippingMarshallerWrapping(m.mediaType().toString());
} else {
encoderRegistry.registerTranscoder(adapter);
}
});
}
void addCacheEventFilterFactory(String name, CacheEventFilterFactory factory) {
if (factory instanceof CacheEventConverterFactory) {
throw log.illegalFilterConverterEventFactory(name);
}
cacheEventFilterFactories.put(name, factory);
}
void removeCacheEventFilterFactory(String name) {
cacheEventFilterFactories.remove(name);
}
void addCacheEventConverterFactory(String name, CacheEventConverterFactory factory) {
if (factory instanceof CacheEventFilterFactory) {
throw log.illegalFilterConverterEventFactory(name);
}
cacheEventConverterFactories.put(name, factory);
}
void removeCacheEventConverterFactory(String name) {
cacheEventConverterFactories.remove(name);
}
void addCacheEventFilterConverterFactory(String name, CacheEventFilterConverterFactory factory) {
cacheEventFilterConverterFactories.put(name, factory);
}
void removeCacheEventFilterConverterFactory(String name) {
cacheEventFilterConverterFactories.remove(name);
}
CompletionStage<Void> addClientListener(Channel ch, HotRodHeader h, byte[] listenerId,
AdvancedCache<byte[], byte[]> cache, boolean includeState,
String filterFactory, List<byte[]> binaryFilterParams,
String converterFactory, List<byte[]> binaryConverterParams,
boolean useRawData, int listenerInterests, BloomFilter<byte[]> bloomFilter) {
CacheEventFilter<byte[], byte[]> filter;
CacheEventConverter<byte[], byte[], byte[]> converter;
ClientEventType eventType;
if (bloomFilter != null) {
assert filterFactory == null || filterFactory.isEmpty();
assert converterFactory == null || converterFactory.isEmpty();
assert !includeState;
eventType = ClientEventType.createType(false, useRawData, h.version);
filter = null;
converter = new KeyValueFilterConverterAsCacheEventFilterConverter<>(HotRodServer.ToEmptyBytesKeyValueFilterConverter.INSTANCE, cache.getKeyDataConversion().getRequestMediaType());
} else {
boolean hasFilter = filterFactory != null && !filterFactory.isEmpty();
boolean hasConverter = converterFactory != null && !converterFactory.isEmpty();
eventType = ClientEventType.createType(hasConverter, useRawData, h.version);
if (hasFilter) {
if (hasConverter) {
if (filterFactory.equals(converterFactory)) {
List<byte[]> binaryParams = binaryFilterParams.isEmpty() ? binaryConverterParams : binaryFilterParams;
CacheEventFilterConverter<byte[], byte[], byte[]> filterConverter = getFilterConverter(h.getValueMediaType(),
filterFactory, useRawData, binaryParams);
filter = filterConverter;
converter = filterConverter;
} else {
filter = getFilter(h.getValueMediaType(), filterFactory, useRawData, binaryFilterParams);
converter = getConverter(h.getValueMediaType(), converterFactory, useRawData, binaryConverterParams);
}
} else {
filter = getFilter(h.getValueMediaType(), filterFactory, useRawData, binaryFilterParams);
converter = null;
}
} else if (hasConverter) {
filter = null;
converter = getConverter(h.getValueMediaType(), converterFactory, useRawData, binaryConverterParams);
} else {
filter = null;
converter = null;
}
}
BaseClientEventSender clientEventSender = getClientEventSender(includeState, ch, h.encoder(), h.version, cache,
listenerId, eventType, h.messageId, bloomFilter);
eventSenders.put(new WrappedByteArray(listenerId), clientEventSender);
return addCacheListener(cache, clientEventSender, filter, converter, listenerInterests, useRawData)
.whenComplete((__, t) -> {
if (t != null) {
// Don't try to remove the listener when
eventSenders.remove(new WrappedByteArray(listenerId));
}
});
}
private CompletionStage<Void> addCacheListener(AdvancedCache<byte[], byte[]> cache, Object clientEventSender,
CacheEventFilter<byte[], byte[]> filter, CacheEventConverter<byte[], byte[], byte[]> converter,
int listenerInterests, boolean useRawData) {
Set<Class<? extends Annotation>> filterAnnotations;
if (listenerInterests == 0x00) {
filterAnnotations = new HashSet<>(Arrays.asList(
CacheEntryCreated.class, CacheEntryModified.class,
CacheEntryRemoved.class, CacheEntryExpired.class));
} else {
filterAnnotations = new HashSet<>();
if ((listenerInterests & 0x01) == 0x01)
filterAnnotations.add(CacheEntryCreated.class);
if ((listenerInterests & 0x02) == 0x02)
filterAnnotations.add(CacheEntryModified.class);
if ((listenerInterests & 0x04) == 0x04)
filterAnnotations.add(CacheEntryRemoved.class);
if ((listenerInterests & 0x08) == 0x08)
filterAnnotations.add(CacheEntryExpired.class);
}
// If no filter or converter are supplied, we can apply a converter so we don't have to return the value - since
// events will only use the key
if (converter == null && filter == null) {
converter = new KeyValueFilterConverterAsCacheEventFilterConverter<>(HotRodServer.ToEmptyBytesKeyValueFilterConverter.INSTANCE);
// We have to use storage format - otherwise passing converer will force it to change to incorrect format
return cache.addStorageFormatFilteredListenerAsync(clientEventSender, filter, converter, filterAnnotations);
} else if (useRawData) {
return cache.addStorageFormatFilteredListenerAsync(clientEventSender, filter, converter, filterAnnotations);
} else {
return cache.addFilteredListenerAsync(clientEventSender, filter, converter, filterAnnotations);
}
}
private CacheEventFilter<byte[], byte[]> getFilter(MediaType requestMedia, String name, Boolean useRawData, List<byte[]> binaryParams) {
CacheEventFilterFactory factory = findFactory(name, cacheEventFilterFactories, "key/value filter");
List<?> params = unmarshallParams(requestMedia, binaryParams, useRawData);
return factory.getFilter(params.toArray());
}
private CacheEventConverter<byte[], byte[], byte[]> getConverter(MediaType requestMedia, String name, Boolean useRawData, List<byte[]> binaryParams) {
CacheEventConverterFactory factory = findFactory(name, cacheEventConverterFactories, "converter");
List<?> params = unmarshallParams(requestMedia, binaryParams, useRawData);
return factory.getConverter(params.toArray());
}
private CacheEventFilterConverter<byte[], byte[], byte[]> getFilterConverter(MediaType requestMedia, String name, boolean useRawData, List<byte[]> binaryParams) {
CacheEventFilterConverterFactory factory = findFactory(name, cacheEventFilterConverterFactories, "converter");
List<?> params = unmarshallParams(requestMedia, binaryParams, useRawData);
return factory.getFilterConverter(params.toArray());
}
private <T> T findFactory(String name, ConcurrentMap<String, T> factories, String factoryType) {
T factory = factories.get(name);
if (factory == null) throw log.missingCacheEventFactory(factoryType, name);
return factory;
}
private List<?> unmarshallParams(MediaType requestMedia, List<byte[]> binaryParams, boolean useRawData) {
if (useRawData) return binaryParams;
return binaryParams.stream().map(bp -> encoderRegistry.convert(bp, requestMedia, APPLICATION_OBJECT)).collect(Collectors.toList());
}
CompletionStage<Boolean> removeClientListener(byte[] listenerId, Cache cache) {
Object sender = eventSenders.remove(new WrappedByteArray(listenerId));
if (sender != null) {
// No permission check needed: Either the client had the LISTEN permission to add the listener,
// or the listener was never added and removing it is a no-op
return SecurityActions.removeListenerAsync(cache, sender)
.thenCompose(ignore -> CompletableFutures.completedTrue());
} else return CompletableFutures.completedFalse();
}
public void stop() {
eventSenders.clear();
cacheEventFilterFactories.clear();
cacheEventConverterFactories.clear();
}
void findAndWriteEvents(Channel channel) {
// Make sure we write any event in main event loop
channel.eventLoop().execute(() -> eventSenders.values().forEach(s -> {
if (s instanceof BaseClientEventSender) {
BaseClientEventSender bces = (BaseClientEventSender) s;
if (bces.hasChannel(channel)) bces.writeEventsIfPossible();
}
}));
}
// Do not make sync=false, instead move cache operation causing
// listener calls out of the Netty event loop thread
@Listener(clustered = true, includeCurrentState = true)
private class StatefulClientEventSender extends BaseClientEventSender {
private final long messageId;
StatefulClientEventSender(Cache cache, Channel ch, VersionedEncoder encoder, byte[] listenerId, byte version, ClientEventType targetEventType, long messageId) {
super(cache, ch, encoder, listenerId, version, targetEventType);
this.messageId = messageId;
}
@Override
protected long getEventId(CacheEntryEvent event) {
return event.isCurrentState() ? messageId : 0;
}
}
@Listener(clustered = true)
private class StatelessClientEventSender extends BaseClientEventSender {
StatelessClientEventSender(Cache cache, Channel ch, VersionedEncoder encoder, byte[] listenerId, byte version, ClientEventType targetEventType) {
super(cache, ch, encoder, listenerId, version, targetEventType);
}
}
@Listener(clustered = true)
private class BloomAwareStatelessClientEventSender extends StatelessClientEventSender {
private final BloomFilter<byte[]> bloomFilter;
BloomAwareStatelessClientEventSender(Cache cache, Channel ch, VersionedEncoder encoder, byte[] listenerId,
byte version, ClientEventType targetEventType, BloomFilter<byte[]> bloomFilter) {
super(cache, ch, encoder, listenerId, version, targetEventType);
this.bloomFilter = bloomFilter;
}
boolean isSendEvent(CacheEntryEvent<byte[], byte[]> event) {
if (super.isSendEvent(event)) {
if (bloomFilter.possiblyPresent(event.getKey())) {
if (log.isTraceEnabled()) {
log.tracef("Event %s passed bloom filter", event);
}
return true;
} else if (log.isTraceEnabled()) {
log.tracef("Event %s didn't pass bloom filter", event);
}
}
return false;
}
}
private abstract class BaseClientEventSender {
protected final Channel ch;
protected final VersionedEncoder encoder;
protected final byte[] listenerId;
protected final byte version;
protected final ClientEventType targetEventType;
protected final Cache cache;
final int maxQueueSize = 100;
final AtomicInteger eventSize = new AtomicInteger();
final Queue<Events.Event> eventQueue = new ConcurrentLinkedQueue<>();
private final Runnable writeEventsIfPossible = this::writeEventsIfPossible;
BaseClientEventSender(Cache cache, Channel ch, VersionedEncoder encoder, byte[] listenerId, byte version, ClientEventType targetEventType) {
this.cache = cache;
this.ch = ch;
this.encoder = encoder;
this.listenerId = listenerId;
this.version = version;
this.targetEventType = targetEventType;
}
void init() {
ch.closeFuture().addListener(f -> {
log.debug("Channel disconnected, removing event sender listener for id: " + Util.printArray(listenerId));
removeClientListener(listenerId, cache)
.whenComplete((ignore, t) -> unblockCommands());
});
}
private void unblockCommands() {
// Have to allow all waiting listeners to proceed
for (Events.Event event : eventQueue) {
event.eventFuture.complete(null);
}
}
boolean hasChannel(Channel channel) {
return ch == channel;
}
// This method can only be invoked from the Event Loop thread!
void writeEventsIfPossible() {
boolean submittedUnblock = false;
boolean written = false;
while (!eventQueue.isEmpty() && ch.isWritable()) {
eventSize.decrementAndGet();
Events.Event event = eventQueue.remove();
if (log.isTraceEnabled()) log.tracef("Write event: %s to channel %s", event, ch);
CompletableFuture<Void> cf = event.eventFuture;
// We can just check instance equality as this is used to symbolize the event was not blocked below
if (cf != CompletableFutures.<Void>completedNull()) {
nonBlockingExecutor.execute(() -> event.eventFuture.complete(null));
}
ByteBuf buf = ch.alloc().ioBuffer();
encoder.writeEvent(event, buf);
ch.write(buf);
written = true;
}
if (written) {
ch.flush();
}
}
@CacheEntryCreated
@CacheEntryModified
@CacheEntryRemoved
@CacheEntryExpired
public CompletionStage<Void> onCacheEvent(CacheEntryEvent<byte[], byte[]> event) {
if (isSendEvent(event)) {
long version;
Metadata metadata;
if ((metadata = event.getMetadata()) != null && metadata.version() != null) {
version = ((NumericVersion) metadata.version()).getVersion();
} else {
version = 0;
}
Object k = event.getKey();
Object v = event.getValue();
return sendEvent((byte[]) k, (byte[]) v, version, event);
}
return null;
}
boolean isSendEvent(CacheEntryEvent<byte[], byte[]> event) {
if (isChannelDisconnected()) {
log.debug("Channel disconnected, ignoring event");
return false;
} else {
switch (event.getType()) {
case CACHE_ENTRY_CREATED:
case CACHE_ENTRY_MODIFIED:
case CACHE_ENTRY_REMOVED:
return !event.isPre();
case CACHE_ENTRY_EXPIRED:
return true;
default:
throw log.unexpectedEvent(event);
}
}
}
boolean isChannelDisconnected() {
return !ch.isOpen();
}
CompletionStage<Void> sendEvent(byte[] key, byte[] value, long dataVersion, CacheEntryEvent event) {
EventLoop loop = ch.eventLoop();
int size = eventSize.incrementAndGet();
boolean forceWait = size >= maxQueueSize;
final CompletableFuture<Void> cf;
if (forceWait) {
if (log.isTraceEnabled()) {
log.tracef("Pending event size is %s which is forcing %s to delay operation until it is sent", size, event);
}
cf = new CompletableFuture<>();
} else {
cf = CompletableFutures.completedNull();
}
Events.Event remoteEvent = createRemoteEvent(key, value, dataVersion, event, cf);
if (log.isTraceEnabled())
log.tracef("Queue event %s, before queuing event queue size is %d", remoteEvent, size - 1);
eventQueue.add(remoteEvent);
if (ch.isWritable()) {
// Make sure we write any event in main event loop
loop.submit(writeEventsIfPossible);
}
return cf;
}
private Events.Event createRemoteEvent(byte[] key, byte[] value, long dataVersion, CacheEntryEvent event,
CompletableFuture<Void> eventFuture) {
// Embedded listener event implementation implements all interfaces,
// so can't pattern match on the event instance itself. Instead, pattern
// match on the type and the cast down to the expected event instance type
switch (targetEventType) {
case PLAIN:
switch (event.getType()) {
case CACHE_ENTRY_CREATED:
case CACHE_ENTRY_MODIFIED:
KeyValuePair<HotRodOperation, Boolean> responseType = getEventResponseType(event);
return new Events.KeyWithVersionEvent(version, getEventId(event), responseType.getKey(), listenerId,
responseType.getValue(), key, dataVersion, eventFuture);
case CACHE_ENTRY_REMOVED:
case CACHE_ENTRY_EXPIRED:
responseType = getEventResponseType(event);
return new Events.KeyEvent(version, getEventId(event), responseType.getKey(), listenerId,
responseType.getValue(), key, eventFuture);
default:
throw log.unexpectedEvent(event);
}
case CUSTOM_PLAIN:
KeyValuePair<HotRodOperation, Boolean> responseType = getEventResponseType(event);
return new Events.CustomEvent(version, getEventId(event), responseType.getKey(), listenerId,
responseType.getValue(), value, eventFuture);
case CUSTOM_RAW:
responseType = getEventResponseType(event);
return new Events.CustomRawEvent(version, getEventId(event), responseType.getKey(), listenerId,
responseType.getValue(), value, eventFuture);
default:
throw new IllegalArgumentException("Event type not supported: " + targetEventType);
}
}
protected long getEventId(CacheEntryEvent event) {
return 0;
}
private KeyValuePair<HotRodOperation, Boolean> getEventResponseType(CacheEntryEvent event) {
switch (event.getType()) {
case CACHE_ENTRY_CREATED:
return new KeyValuePair<>(HotRodOperation.CACHE_ENTRY_CREATED_EVENT,
((CacheEntryCreatedEvent) event).isCommandRetried());
case CACHE_ENTRY_MODIFIED:
return new KeyValuePair<>(HotRodOperation.CACHE_ENTRY_MODIFIED_EVENT,
((CacheEntryModifiedEvent) event).isCommandRetried());
case CACHE_ENTRY_REMOVED:
return new KeyValuePair<>(HotRodOperation.CACHE_ENTRY_REMOVED_EVENT,
((CacheEntryRemovedEvent) event).isCommandRetried());
case CACHE_ENTRY_EXPIRED:
return new KeyValuePair<>(HotRodOperation.CACHE_ENTRY_EXPIRED_EVENT, false);
default:
throw log.unexpectedEvent(event);
}
}
}
private BaseClientEventSender getClientEventSender(boolean includeState, Channel ch, VersionedEncoder encoder,
byte version, Cache cache, byte[] listenerId,
ClientEventType eventType, long messageId,
BloomFilter<byte[]> bloomFilter) {
BaseClientEventSender bces;
if (includeState) {
bces = new StatefulClientEventSender(cache, ch, encoder, listenerId, version, eventType, messageId);
} else {
if (bloomFilter != null) {
bces = new BloomAwareStatelessClientEventSender(cache, ch, encoder, listenerId, version, eventType,
bloomFilter);
} else {
bces = new StatelessClientEventSender(cache, ch, encoder, listenerId, version, eventType);
}
}
bces.init();
return bces;
}
}
enum ClientEventType {
PLAIN,
CUSTOM_PLAIN,
CUSTOM_RAW;
static ClientEventType createType(boolean isCustom, boolean useRawData, byte version) {
if (isCustom) {
if (useRawData && HotRodVersion.HOTROD_21.isAtLeast(version)) {
return CUSTOM_RAW;
}
return CUSTOM_PLAIN;
}
return PLAIN;
}
}