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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cassandra.net;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
import java.util.function.Predicate;
import org.slf4j.LoggerFactory;
import net.openhft.chronicle.core.util.ThrowingConsumer;
import org.apache.cassandra.db.filter.TombstoneOverwhelmingException;
import org.apache.cassandra.exceptions.RequestFailureReason;
import org.apache.cassandra.index.IndexNotAvailableException;
import org.apache.cassandra.locator.InetAddressAndPort;
import org.apache.cassandra.utils.NoSpamLogger;
/**
* A message sink that all inbound messages go through.
*
* Default sink used by {@link MessagingService} is {@link IVerbHandler#doVerb(Message)}, but it can be overridden
* to filter out certain messages, record the fact of attempted delivery, or delay arrival.
*
* This facility is most useful for test code.
*
* {@link #accept(Message)} is invoked on a thread belonging to the {@link org.apache.cassandra.concurrent.Stage}
* assigned to the {@link Verb} of the message.
*/
public class InboundSink implements InboundMessageHandlers.MessageConsumer
{
private static final NoSpamLogger noSpamLogger =
NoSpamLogger.getLogger(LoggerFactory.getLogger(InboundSink.class), 1L, TimeUnit.SECONDS);
private static class Filtered implements ThrowingConsumer, IOException>
{
final Predicate> condition;
final ThrowingConsumer, IOException> next;
private Filtered(Predicate> condition, ThrowingConsumer, IOException> next)
{
this.condition = condition;
this.next = next;
}
public void accept(Message message) throws IOException
{
if (condition.test(message))
next.accept(message);
}
}
@SuppressWarnings("FieldMayBeFinal")
private volatile ThrowingConsumer, IOException> sink;
private static final AtomicReferenceFieldUpdater sinkUpdater
= AtomicReferenceFieldUpdater.newUpdater(InboundSink.class, ThrowingConsumer.class, "sink");
private final MessagingService messaging;
InboundSink(MessagingService messaging)
{
this.messaging = messaging;
this.sink = message -> message.header.verb.handler().doVerb((Message