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From jasobr...@apache.org
Subject [05/11] cassandra git commit: switch internode messaging to netty
Date Tue, 22 Aug 2017 20:55:12 GMT
http://git-wip-us.apache.org/repos/asf/cassandra/blob/356dc3c2/test/unit/org/apache/cassandra/net/async/OutboundMessagingConnectionTest.java
----------------------------------------------------------------------
diff --git a/test/unit/org/apache/cassandra/net/async/OutboundMessagingConnectionTest.java b/test/unit/org/apache/cassandra/net/async/OutboundMessagingConnectionTest.java
new file mode 100644
index 0000000..772e47d
--- /dev/null
+++ b/test/unit/org/apache/cassandra/net/async/OutboundMessagingConnectionTest.java
@@ -0,0 +1,519 @@
+/*
+ * 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.async;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.Delayed;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.concurrent.atomic.AtomicReference;
+import javax.net.ssl.SSLHandshakeException;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelPromise;
+import io.netty.channel.embedded.EmbeddedChannel;
+import org.apache.cassandra.auth.AllowAllInternodeAuthenticator;
+import org.apache.cassandra.auth.IInternodeAuthenticator;
+import org.apache.cassandra.config.Config;
+import org.apache.cassandra.config.DatabaseDescriptor;
+import org.apache.cassandra.exceptions.ConfigurationException;
+import org.apache.cassandra.locator.AbstractEndpointSnitch;
+import org.apache.cassandra.locator.IEndpointSnitch;
+import org.apache.cassandra.net.MessageOut;
+import org.apache.cassandra.net.MessagingService;
+import org.apache.cassandra.net.MessagingServiceTest;
+import org.apache.cassandra.net.async.OutboundHandshakeHandler.HandshakeResult;
+import org.apache.cassandra.net.async.OutboundMessagingConnection.State;
+
+import static org.apache.cassandra.net.MessagingService.Verb.ECHO;
+import static org.apache.cassandra.net.async.OutboundMessagingConnection.State.CLOSED;
+import static org.apache.cassandra.net.async.OutboundMessagingConnection.State.CREATING_CHANNEL;
+import static org.apache.cassandra.net.async.OutboundMessagingConnection.State.NOT_READY;
+import static org.apache.cassandra.net.async.OutboundMessagingConnection.State.READY;
+
+public class OutboundMessagingConnectionTest
+{
+    private static final InetSocketAddress LOCAL_ADDR = new InetSocketAddress("127.0.0.1", 9998);
+    private static final InetSocketAddress REMOTE_ADDR = new InetSocketAddress("127.0.0.2", 9999);
+    private static final InetSocketAddress RECONNECT_ADDR = new InetSocketAddress("127.0.0.3", 9999);
+    private static final int MESSAGING_VERSION = MessagingService.current_version;
+
+    private OutboundConnectionIdentifier connectionId;
+    private OutboundMessagingConnection omc;
+    private EmbeddedChannel channel;
+
+    private IEndpointSnitch snitch;
+
+    @BeforeClass
+    public static void before()
+    {
+        DatabaseDescriptor.daemonInitialization();
+    }
+
+    @Before
+    public void setup()
+    {
+        connectionId = OutboundConnectionIdentifier.small(LOCAL_ADDR, REMOTE_ADDR);
+        omc = new OutboundMessagingConnection(connectionId, null, Optional.empty(), new AllowAllInternodeAuthenticator());
+        channel = new EmbeddedChannel();
+        omc.setChannelWriter(ChannelWriter.create(channel, omc::handleMessageResult, Optional.empty()));
+
+        snitch = DatabaseDescriptor.getEndpointSnitch();
+    }
+
+    @After
+    public void tearDown()
+    {
+        DatabaseDescriptor.setEndpointSnitch(snitch);
+        channel.finishAndReleaseAll();
+    }
+
+    @Test
+    public void sendMessage_CreatingChannel()
+    {
+        Assert.assertEquals(0, omc.backlogSize());
+        omc.setState(CREATING_CHANNEL);
+        Assert.assertTrue(omc.sendMessage(new MessageOut<>(ECHO), 1));
+        Assert.assertEquals(1, omc.backlogSize());
+        Assert.assertEquals(1, omc.getPendingMessages().intValue());
+    }
+
+    @Test
+    public void sendMessage_HappyPath()
+    {
+        Assert.assertEquals(0, omc.backlogSize());
+        omc.setState(READY);
+        Assert.assertTrue(omc.sendMessage(new MessageOut<>(ECHO), 1));
+        Assert.assertEquals(0, omc.backlogSize());
+        Assert.assertTrue(channel.releaseOutbound());
+    }
+
+    @Test
+    public void sendMessage_Closed()
+    {
+        Assert.assertEquals(0, omc.backlogSize());
+        omc.setState(CLOSED);
+        Assert.assertFalse(omc.sendMessage(new MessageOut<>(ECHO), 1));
+        Assert.assertEquals(0, omc.backlogSize());
+        Assert.assertFalse(channel.releaseOutbound());
+    }
+
+    @Test
+    public void shouldCompressConnection_None()
+    {
+        DatabaseDescriptor.setInternodeCompression(Config.InternodeCompression.none);
+        Assert.assertFalse(OutboundMessagingConnection.shouldCompressConnection(LOCAL_ADDR.getAddress(), REMOTE_ADDR.getAddress()));
+    }
+
+    @Test
+    public void shouldCompressConnection_All()
+    {
+        DatabaseDescriptor.setInternodeCompression(Config.InternodeCompression.all);
+        Assert.assertTrue(OutboundMessagingConnection.shouldCompressConnection(LOCAL_ADDR.getAddress(), REMOTE_ADDR.getAddress()));
+    }
+
+    @Test
+    public void shouldCompressConnection_SameDc()
+    {
+        TestSnitch snitch = new TestSnitch();
+        snitch.add(LOCAL_ADDR.getAddress(), "dc1");
+        snitch.add(REMOTE_ADDR.getAddress(), "dc1");
+        DatabaseDescriptor.setEndpointSnitch(snitch);
+        DatabaseDescriptor.setInternodeCompression(Config.InternodeCompression.dc);
+        Assert.assertFalse(OutboundMessagingConnection.shouldCompressConnection(LOCAL_ADDR.getAddress(), REMOTE_ADDR.getAddress()));
+    }
+
+    private static class TestSnitch extends AbstractEndpointSnitch
+    {
+        private Map<InetAddress, String> nodeToDc = new HashMap<>();
+
+        void add(InetAddress node, String dc)
+        {
+            nodeToDc.put(node, dc);
+        }
+
+        public String getRack(InetAddress endpoint)
+        {
+            return null;
+        }
+
+        public String getDatacenter(InetAddress endpoint)
+        {
+            return nodeToDc.get(endpoint);
+        }
+
+        public int compareEndpoints(InetAddress target, InetAddress a1, InetAddress a2)
+        {
+            return 0;
+        }
+    }
+
+    @Test
+    public void shouldCompressConnection_DifferentDc()
+    {
+        TestSnitch snitch = new TestSnitch();
+        snitch.add(LOCAL_ADDR.getAddress(), "dc1");
+        snitch.add(REMOTE_ADDR.getAddress(), "dc2");
+        DatabaseDescriptor.setEndpointSnitch(snitch);
+        DatabaseDescriptor.setInternodeCompression(Config.InternodeCompression.dc);
+        Assert.assertTrue(OutboundMessagingConnection.shouldCompressConnection(LOCAL_ADDR.getAddress(), REMOTE_ADDR.getAddress()));
+    }
+
+    @Test
+    public void close_softClose()
+    {
+        close(true);
+    }
+
+    @Test
+    public void close_hardClose()
+    {
+        close(false);
+    }
+
+    private void close(boolean softClose)
+    {
+        int count = 32;
+        for (int i = 0; i < count; i++)
+            omc.addToBacklog(new QueuedMessage(new MessageOut<>(ECHO), i));
+        Assert.assertEquals(count, omc.backlogSize());
+        Assert.assertEquals(count, omc.getPendingMessages().intValue());
+
+        ScheduledFuture<?> connectionTimeoutFuture = new TestScheduledFuture();
+        Assert.assertFalse(connectionTimeoutFuture.isCancelled());
+        omc.setConnectionTimeoutFuture(connectionTimeoutFuture);
+        ChannelWriter channelWriter = ChannelWriter.create(channel, omc::handleMessageResult, Optional.empty());
+        omc.setChannelWriter(channelWriter);
+
+        omc.close(softClose);
+        Assert.assertFalse(channel.isActive());
+        Assert.assertEquals(State.CLOSED, omc.getState());
+        Assert.assertEquals(0, omc.backlogSize());
+        Assert.assertEquals(0, omc.getPendingMessages().intValue());
+        int sentMessages = channel.outboundMessages().size();
+
+        if (softClose)
+            Assert.assertTrue(count <= sentMessages);
+        else
+            Assert.assertEquals(0, sentMessages);
+        Assert.assertTrue(connectionTimeoutFuture.isCancelled());
+        Assert.assertTrue(channelWriter.isClosed());
+    }
+
+    @Test
+    public void connect_IInternodeAuthFail()
+    {
+        IInternodeAuthenticator auth = new IInternodeAuthenticator()
+        {
+            public boolean authenticate(InetAddress remoteAddress, int remotePort)
+            {
+                return false;
+            }
+
+            public void validateConfiguration() throws ConfigurationException
+            {
+
+            }
+        };
+
+        MessageOut messageOut = new MessageOut(MessagingService.Verb.GOSSIP_DIGEST_ACK);
+        OutboundMessagingPool pool = new OutboundMessagingPool(REMOTE_ADDR, LOCAL_ADDR, null,
+                                                               new MessagingServiceTest.MockBackPressureStrategy(null).newState(REMOTE_ADDR.getAddress()), auth);
+        omc = pool.getConnection(messageOut);
+        Assert.assertSame(State.NOT_READY, omc.getState());
+        Assert.assertFalse(omc.connect());
+    }
+
+    @Test
+    public void connect_ConnectionAlreadyStarted()
+    {
+        omc.setState(State.CREATING_CHANNEL);
+        Assert.assertFalse(omc.connect());
+        Assert.assertSame(State.CREATING_CHANNEL, omc.getState());
+    }
+
+    @Test
+    public void connect_ConnectionClosed()
+    {
+        omc.setState(State.CLOSED);
+        Assert.assertFalse(omc.connect());
+        Assert.assertSame(State.CLOSED, omc.getState());
+    }
+
+    @Test
+    public void connectionTimeout_StateIsReady()
+    {
+        omc.setState(READY);
+        ChannelFuture channelFuture = channel.newPromise();
+        Assert.assertFalse(omc.connectionTimeout(channelFuture));
+        Assert.assertEquals(READY, omc.getState());
+    }
+
+    @Test
+    public void connectionTimeout_StateIsClosed()
+    {
+        omc.setState(CLOSED);
+        ChannelFuture channelFuture = channel.newPromise();
+        Assert.assertTrue(omc.connectionTimeout(channelFuture));
+        Assert.assertEquals(CLOSED, omc.getState());
+    }
+
+    @Test
+    public void connectionTimeout_AssumeConnectionTimedOut()
+    {
+        int count = 32;
+        for (int i = 0; i < count; i++)
+            omc.addToBacklog(new QueuedMessage(new MessageOut<>(ECHO), i));
+        Assert.assertEquals(count, omc.backlogSize());
+        Assert.assertEquals(count, omc.getPendingMessages().intValue());
+
+        omc.setState(CREATING_CHANNEL);
+        ChannelFuture channelFuture = channel.newPromise();
+        Assert.assertTrue(omc.connectionTimeout(channelFuture));
+        Assert.assertEquals(NOT_READY, omc.getState());
+        Assert.assertEquals(0, omc.backlogSize());
+        Assert.assertEquals(0, omc.getPendingMessages().intValue());
+    }
+
+    @Test
+    public void connectCallback_FutureIsSuccess()
+    {
+        ChannelPromise promise = channel.newPromise();
+        promise.setSuccess();
+        Assert.assertTrue(omc.connectCallback(promise));
+    }
+
+    @Test
+    public void connectCallback_Closed()
+    {
+        ChannelPromise promise = channel.newPromise();
+        omc.setState(State.CLOSED);
+        Assert.assertFalse(omc.connectCallback(promise));
+    }
+
+    @Test
+    public void connectCallback_FailCauseIsSslHandshake()
+    {
+        ChannelPromise promise = channel.newPromise();
+        promise.setFailure(new SSLHandshakeException("test is only a test"));
+        Assert.assertFalse(omc.connectCallback(promise));
+        Assert.assertSame(State.NOT_READY, omc.getState());
+    }
+
+    @Test
+    public void connectCallback_FailCauseIsNPE()
+    {
+        ChannelPromise promise = channel.newPromise();
+        promise.setFailure(new NullPointerException("test is only a test"));
+        Assert.assertFalse(omc.connectCallback(promise));
+        Assert.assertSame(State.NOT_READY, omc.getState());
+    }
+
+    @Test
+    public void connectCallback_FailCauseIsIOException()
+    {
+        ChannelPromise promise = channel.newPromise();
+        promise.setFailure(new IOException("test is only a test"));
+        Assert.assertFalse(omc.connectCallback(promise));
+        Assert.assertSame(State.NOT_READY, omc.getState());
+    }
+
+    @Test
+    public void connectCallback_FailedAndItsClosed()
+    {
+        ChannelPromise promise = channel.newPromise();
+        promise.setFailure(new IOException("test is only a test"));
+        omc.setState(CLOSED);
+        Assert.assertFalse(omc.connectCallback(promise));
+        Assert.assertSame(State.CLOSED, omc.getState());
+    }
+
+    @Test
+    public void finishHandshake_GOOD()
+    {
+        ChannelWriter channelWriter = ChannelWriter.create(channel, omc::handleMessageResult, Optional.empty());
+        HandshakeResult result = HandshakeResult.success(channelWriter, MESSAGING_VERSION);
+        ScheduledFuture<?> connectionTimeoutFuture = new TestScheduledFuture();
+        Assert.assertFalse(connectionTimeoutFuture.isCancelled());
+
+        omc.setChannelWriter(null);
+        omc.setConnectionTimeoutFuture(connectionTimeoutFuture);
+        omc.finishHandshake(result);
+        Assert.assertFalse(channelWriter.isClosed());
+        Assert.assertEquals(channelWriter, omc.getChannelWriter());
+        Assert.assertEquals(READY, omc.getState());
+        Assert.assertEquals(MESSAGING_VERSION, MessagingService.instance().getVersion(REMOTE_ADDR.getAddress()));
+        Assert.assertNull(omc.getConnectionTimeoutFuture());
+        Assert.assertTrue(connectionTimeoutFuture.isCancelled());
+    }
+
+    @Test
+    public void finishHandshake_GOOD_ButClosed()
+    {
+        ChannelWriter channelWriter = ChannelWriter.create(channel, omc::handleMessageResult, Optional.empty());
+        HandshakeResult result = HandshakeResult.success(channelWriter, MESSAGING_VERSION);
+        ScheduledFuture<?> connectionTimeoutFuture = new TestScheduledFuture();
+        Assert.assertFalse(connectionTimeoutFuture.isCancelled());
+
+        omc.setChannelWriter(null);
+        omc.setState(CLOSED);
+        omc.setConnectionTimeoutFuture(connectionTimeoutFuture);
+        omc.finishHandshake(result);
+        Assert.assertTrue(channelWriter.isClosed());
+        Assert.assertNull(omc.getChannelWriter());
+        Assert.assertEquals(CLOSED, omc.getState());
+        Assert.assertEquals(MESSAGING_VERSION, MessagingService.instance().getVersion(REMOTE_ADDR.getAddress()));
+        Assert.assertNull(omc.getConnectionTimeoutFuture());
+        Assert.assertTrue(connectionTimeoutFuture.isCancelled());
+    }
+
+    @Test
+    public void finishHandshake_DISCONNECT()
+    {
+        int count = 32;
+        for (int i = 0; i < count; i++)
+            omc.addToBacklog(new QueuedMessage(new MessageOut<>(ECHO), i));
+        Assert.assertEquals(count, omc.backlogSize());
+
+        HandshakeResult result = HandshakeResult.disconnect(MESSAGING_VERSION);
+        omc.finishHandshake(result);
+        Assert.assertNotNull(omc.getChannelWriter());
+        Assert.assertEquals(CREATING_CHANNEL, omc.getState());
+        Assert.assertEquals(MESSAGING_VERSION, MessagingService.instance().getVersion(REMOTE_ADDR.getAddress()));
+        Assert.assertEquals(count, omc.backlogSize());
+    }
+
+    @Test
+    public void finishHandshake_CONNECT_FAILURE()
+    {
+        int count = 32;
+        for (int i = 0; i < count; i++)
+            omc.addToBacklog(new QueuedMessage(new MessageOut<>(ECHO), i));
+        Assert.assertEquals(count, omc.backlogSize());
+
+        HandshakeResult result = HandshakeResult.failed();
+        omc.finishHandshake(result);
+        Assert.assertEquals(NOT_READY, omc.getState());
+        Assert.assertEquals(MESSAGING_VERSION, MessagingService.instance().getVersion(REMOTE_ADDR.getAddress()));
+        Assert.assertEquals(0, omc.backlogSize());
+    }
+
+    @Test
+    public void setStateIfNotClosed_AlreadyClosed()
+    {
+        AtomicReference<State> state = new AtomicReference<>(CLOSED);
+        OutboundMessagingConnection.setStateIfNotClosed(state, NOT_READY);
+        Assert.assertEquals(CLOSED, state.get());
+    }
+
+    @Test
+    public void setStateIfNotClosed_NotClosed()
+    {
+        AtomicReference<State> state = new AtomicReference<>(READY);
+        OutboundMessagingConnection.setStateIfNotClosed(state, NOT_READY);
+        Assert.assertEquals(NOT_READY, state.get());
+    }
+
+    @Test
+    public void reconnectWithNewIp_HappyPath()
+    {
+        ChannelWriter channelWriter = ChannelWriter.create(channel, omc::handleMessageResult, Optional.empty());
+        omc.setChannelWriter(channelWriter);
+        omc.setState(READY);
+        OutboundConnectionIdentifier originalId = omc.getConnectionId();
+        omc.reconnectWithNewIp(RECONNECT_ADDR);
+        Assert.assertFalse(omc.getConnectionId().equals(originalId));
+        Assert.assertTrue(channelWriter.isClosed());
+        Assert.assertNotSame(CLOSED, omc.getState());
+    }
+
+    @Test
+    public void reconnectWithNewIp_Closed()
+    {
+        omc.setState(CLOSED);
+        OutboundConnectionIdentifier originalId = omc.getConnectionId();
+        omc.reconnectWithNewIp(RECONNECT_ADDR);
+        Assert.assertSame(omc.getConnectionId(), originalId);
+        Assert.assertSame(CLOSED, omc.getState());
+    }
+
+    @Test
+    public void reconnectWithNewIp_UnsedConnection()
+    {
+        omc.setState(NOT_READY);
+        OutboundConnectionIdentifier originalId = omc.getConnectionId();
+        omc.reconnectWithNewIp(RECONNECT_ADDR);
+        Assert.assertNotSame(omc.getConnectionId(), originalId);
+        Assert.assertSame(NOT_READY, omc.getState());
+    }
+
+    private static class TestScheduledFuture implements ScheduledFuture<Object>
+    {
+        private boolean cancelled = false;
+
+        public long getDelay(TimeUnit unit)
+        {
+            return 0;
+        }
+
+        public int compareTo(Delayed o)
+        {
+            return 0;
+        }
+
+        public boolean cancel(boolean mayInterruptIfRunning)
+        {
+            cancelled = true;
+            return false;
+        }
+
+        public boolean isCancelled()
+        {
+            return cancelled;
+        }
+
+        public boolean isDone()
+        {
+            return false;
+        }
+
+        public Object get() throws InterruptedException, ExecutionException
+        {
+            return null;
+        }
+
+        public Object get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException
+        {
+            return null;
+        }
+    }
+}

http://git-wip-us.apache.org/repos/asf/cassandra/blob/356dc3c2/test/unit/org/apache/cassandra/net/async/OutboundMessagingPoolTest.java
----------------------------------------------------------------------
diff --git a/test/unit/org/apache/cassandra/net/async/OutboundMessagingPoolTest.java b/test/unit/org/apache/cassandra/net/async/OutboundMessagingPoolTest.java
new file mode 100644
index 0000000..655cd15
--- /dev/null
+++ b/test/unit/org/apache/cassandra/net/async/OutboundMessagingPoolTest.java
@@ -0,0 +1,149 @@
+/*
+ * 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.async;
+
+import java.net.InetSocketAddress;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import org.apache.cassandra.auth.AllowAllInternodeAuthenticator;
+import org.apache.cassandra.config.DatabaseDescriptor;
+import org.apache.cassandra.db.WriteResponse;
+import org.apache.cassandra.gms.GossipDigestSyn;
+import org.apache.cassandra.io.IVersionedSerializer;
+import org.apache.cassandra.io.util.DataInputPlus;
+import org.apache.cassandra.io.util.DataOutputPlus;
+import org.apache.cassandra.net.BackPressureState;
+import org.apache.cassandra.net.MessageOut;
+import org.apache.cassandra.net.MessagingService;
+import org.apache.cassandra.net.async.OutboundConnectionIdentifier.ConnectionType;
+
+public class OutboundMessagingPoolTest
+{
+    private static final InetSocketAddress LOCAL_ADDR = new InetSocketAddress("127.0.0.1", 9476);
+    private static final InetSocketAddress REMOTE_ADDR = new InetSocketAddress("127.0.0.2", 9476);
+    private static final InetSocketAddress RECONNECT_ADDR = new InetSocketAddress("127.0.0.3", 9476);
+    private static final List<ConnectionType> INTERNODE_MESSAGING_CONN_TYPES = new ArrayList<ConnectionType>()
+            {{ add(ConnectionType.GOSSIP); add(ConnectionType.LARGE_MESSAGE); add(ConnectionType.SMALL_MESSAGE); }};
+
+    private OutboundMessagingPool pool;
+
+    @BeforeClass
+    public static void before()
+    {
+        DatabaseDescriptor.daemonInitialization();
+    }
+
+    @Before
+    public void setup()
+    {
+        BackPressureState backPressureState = DatabaseDescriptor.getBackPressureStrategy().newState(REMOTE_ADDR.getAddress());
+        pool = new OutboundMessagingPool(REMOTE_ADDR, LOCAL_ADDR, null, backPressureState, new AllowAllInternodeAuthenticator());
+    }
+
+    @After
+    public void tearDown()
+    {
+        if (pool != null)
+            pool.close(false);
+    }
+
+    @Test
+    public void getConnection_Gossip()
+    {
+        GossipDigestSyn syn = new GossipDigestSyn("cluster", "partitioner", new ArrayList<>(0));
+        MessageOut<GossipDigestSyn> message = new MessageOut<>(MessagingService.Verb.GOSSIP_DIGEST_SYN,
+                                                                              syn, GossipDigestSyn.serializer);
+        Assert.assertEquals(ConnectionType.GOSSIP, pool.getConnection(message).getConnectionId().type());
+    }
+
+    @Test
+    public void getConnection_SmallMessage()
+    {
+        MessageOut message = WriteResponse.createMessage();
+        Assert.assertEquals(ConnectionType.SMALL_MESSAGE, pool.getConnection(message).getConnectionId().type());
+    }
+
+    @Test
+    public void getConnection_LargeMessage()
+    {
+        // just need a serializer to report a size, as fake as it may be
+        IVersionedSerializer<Object> serializer = new IVersionedSerializer<Object>()
+        {
+            public void serialize(Object o, DataOutputPlus out, int version)
+            {
+
+            }
+
+            public Object deserialize(DataInputPlus in, int version)
+            {
+                return null;
+            }
+
+            public long serializedSize(Object o, int version)
+            {
+                return OutboundMessagingPool.LARGE_MESSAGE_THRESHOLD + 1;
+            }
+        };
+        MessageOut message = new MessageOut<>(MessagingService.Verb.UNUSED_5, "payload", serializer);
+        Assert.assertEquals(ConnectionType.LARGE_MESSAGE, pool.getConnection(message).getConnectionId().type());
+    }
+
+    @Test
+    public void close()
+    {
+        for (ConnectionType type : INTERNODE_MESSAGING_CONN_TYPES)
+            Assert.assertNotSame(OutboundMessagingConnection.State.CLOSED, pool.getConnection(type).getState());
+        pool.close(false);
+        for (ConnectionType type : INTERNODE_MESSAGING_CONN_TYPES)
+            Assert.assertEquals(OutboundMessagingConnection.State.CLOSED, pool.getConnection(type).getState());
+    }
+
+    @Test
+    public void reconnectWithNewIp()
+    {
+        for (ConnectionType type : INTERNODE_MESSAGING_CONN_TYPES)
+        {
+            Assert.assertEquals(REMOTE_ADDR, pool.getPreferredRemoteAddr());
+            Assert.assertEquals(REMOTE_ADDR, pool.getConnection(type).getConnectionId().connectionAddress());
+        }
+
+        pool.reconnectWithNewIp(RECONNECT_ADDR);
+
+        for (ConnectionType type : INTERNODE_MESSAGING_CONN_TYPES)
+        {
+            Assert.assertEquals(RECONNECT_ADDR, pool.getPreferredRemoteAddr());
+            Assert.assertEquals(RECONNECT_ADDR, pool.getConnection(type).getConnectionId().connectionAddress());
+        }
+    }
+
+    @Test
+    public void timeoutCounter()
+    {
+        long originalValue = pool.getTimeouts();
+        pool.incrementTimeout();
+        Assert.assertEquals(originalValue + 1, pool.getTimeouts());
+    }
+}

http://git-wip-us.apache.org/repos/asf/cassandra/blob/356dc3c2/test/unit/org/apache/cassandra/net/async/TestAuthenticator.java
----------------------------------------------------------------------
diff --git a/test/unit/org/apache/cassandra/net/async/TestAuthenticator.java b/test/unit/org/apache/cassandra/net/async/TestAuthenticator.java
new file mode 100644
index 0000000..3107f2a
--- /dev/null
+++ b/test/unit/org/apache/cassandra/net/async/TestAuthenticator.java
@@ -0,0 +1,42 @@
+/*
+ * 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.async;
+
+import java.net.InetAddress;
+
+import org.apache.cassandra.auth.IInternodeAuthenticator;
+import org.apache.cassandra.exceptions.ConfigurationException;
+
+class TestAuthenticator implements IInternodeAuthenticator
+{
+    private final boolean authAll;
+
+    TestAuthenticator(boolean authAll)
+    {
+        this.authAll = authAll;
+    }
+
+    public boolean authenticate(InetAddress remoteAddress, int remotePort)
+    {
+        return authAll;
+    }
+
+    public void validateConfiguration() throws ConfigurationException
+    {   }
+}

http://git-wip-us.apache.org/repos/asf/cassandra/blob/356dc3c2/test/unit/org/apache/cassandra/repair/messages/RepairMessageSerializationsTest.java
----------------------------------------------------------------------
diff --git a/test/unit/org/apache/cassandra/repair/messages/RepairMessageSerializationsTest.java b/test/unit/org/apache/cassandra/repair/messages/RepairMessageSerializationsTest.java
index 5dc8112..2ef9446 100644
--- a/test/unit/org/apache/cassandra/repair/messages/RepairMessageSerializationsTest.java
+++ b/test/unit/org/apache/cassandra/repair/messages/RepairMessageSerializationsTest.java
@@ -30,7 +30,9 @@ import org.junit.AfterClass;
 import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Test;
+import org.junit.runner.RunWith;
 
+import org.apache.cassandra.OrderedJUnit4ClassRunner;
 import org.apache.cassandra.config.DatabaseDescriptor;
 import org.apache.cassandra.dht.IPartitioner;
 import org.apache.cassandra.dht.Murmur3Partitioner;

http://git-wip-us.apache.org/repos/asf/cassandra/blob/356dc3c2/test/unit/org/apache/cassandra/security/SSLFactoryTest.java
----------------------------------------------------------------------
diff --git a/test/unit/org/apache/cassandra/security/SSLFactoryTest.java b/test/unit/org/apache/cassandra/security/SSLFactoryTest.java
index b3510bd..61933a5 100644
--- a/test/unit/org/apache/cassandra/security/SSLFactoryTest.java
+++ b/test/unit/org/apache/cassandra/security/SSLFactoryTest.java
@@ -18,23 +18,62 @@
 */
 package org.apache.cassandra.security;
 
-import static org.junit.Assert.assertArrayEquals;
-
 import java.io.IOException;
 import java.net.InetAddress;
-
+import java.security.cert.CertificateException;
+import java.util.Arrays;
 import javax.net.ssl.SSLServerSocket;
+import javax.net.ssl.TrustManagerFactory;
 
 import com.google.common.base.Predicates;
 import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
+import io.netty.handler.ssl.OpenSsl;
+import io.netty.handler.ssl.SslContext;
+import io.netty.handler.ssl.util.SelfSignedCertificate;
+import org.apache.cassandra.config.DatabaseDescriptor;
 import org.apache.cassandra.config.EncryptionOptions;
 import org.apache.cassandra.config.EncryptionOptions.ServerEncryptionOptions;
-import org.junit.Test;
+
+import static org.junit.Assert.assertArrayEquals;
 
 public class SSLFactoryTest
 {
+    private static final Logger logger = LoggerFactory.getLogger(SSLFactoryTest.class);
+
+    static final SelfSignedCertificate ssc;
+    static
+    {
+        DatabaseDescriptor.daemonInitialization();
+        try
+        {
+            ssc = new SelfSignedCertificate();
+        }
+        catch (CertificateException e)
+        {
+            throw new RuntimeException("fialed to create test certs");
+        }
+    }
+
+    private ServerEncryptionOptions encryptionOptions;
+
+    @Before
+    public void setup()
+    {
+        encryptionOptions = new ServerEncryptionOptions();
+        encryptionOptions.truststore = "test/conf/cassandra_ssl_test.truststore";
+        encryptionOptions.truststore_password = "cassandra";
+        encryptionOptions.require_client_auth = false;
+        encryptionOptions.cipher_suites = new String[] {"TLS_RSA_WITH_AES_128_CBC_SHA"};
+
+        SSLFactory.checkedExpiry = false;
+    }
 
     @Test
     public void testFilterCipherSuites()
@@ -48,28 +87,79 @@ public class SSLFactoryTest
     }
 
     @Test
-    public void testServerSocketCiphers() throws IOException
+    public void getSslContext_OpenSSL() throws IOException
     {
-        ServerEncryptionOptions options = new EncryptionOptions.ServerEncryptionOptions();
-        options.keystore = "test/conf/keystore.jks";
-        options.keystore_password = "cassandra";
-        options.truststore = options.keystore;
-        options.truststore_password = options.keystore_password;
-        options.cipher_suites = new String[] {
-            "TLS_RSA_WITH_AES_128_CBC_SHA", "TLS_RSA_WITH_AES_256_CBC_SHA",
-            "TLS_DHE_RSA_WITH_AES_128_CBC_SHA", "TLS_DHE_RSA_WITH_AES_256_CBC_SHA",
-            "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA", "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA"
-        };
-
-        // enabled ciphers must be a subset of configured ciphers with identical order
-        try (SSLServerSocket socket = SSLFactory.getServerSocket(options, InetAddress.getLocalHost(), 55123))
+        // only try this test if OpenSsl is available
+        if (!OpenSsl.isAvailable())
         {
-            String[] enabled = socket.getEnabledCipherSuites();
-            String[] wanted = Iterables.toArray(Iterables.filter(Lists.newArrayList(options.cipher_suites),
-                                                                 Predicates.in(Lists.newArrayList(enabled))),
-                                                String.class);
-            assertArrayEquals(wanted, enabled);
+            logger.warn("OpenSSL not available in this application, so not testing the netty-openssl code paths");
+            return;
         }
+
+        EncryptionOptions options = addKeystoreOptions(encryptionOptions);
+        SslContext sslContext = SSLFactory.getSslContext(options, true, true, true);
+        Assert.assertNotNull(sslContext);
+    }
+
+    @Test
+    public void getSslContext_JdkSsl() throws IOException
+    {
+        EncryptionOptions options = addKeystoreOptions(encryptionOptions);
+        SslContext sslContext = SSLFactory.getSslContext(options, true, true, false);
+        Assert.assertNotNull(sslContext);
+        Assert.assertEquals(Arrays.asList(encryptionOptions.cipher_suites), sslContext.cipherSuites());
+    }
+
+    private EncryptionOptions addKeystoreOptions(EncryptionOptions options)
+    {
+        options.keystore = "test/conf/cassandra_ssl_test.keystore";
+        options.keystore_password = "cassandra";
+        return options;
+    }
+
+    @Test (expected = IOException.class)
+    public void buildTrustManagerFactory_NoFile() throws IOException
+    {
+        encryptionOptions.truststore = "/this/is/probably/not/a/file/on/your/test/machine";
+        SSLFactory.buildTrustManagerFactory(encryptionOptions);
+    }
+
+    @Test (expected = IOException.class)
+    public void buildTrustManagerFactory_BadPassword() throws IOException
+    {
+        encryptionOptions.truststore_password = "HomeOfBadPasswords";
+        SSLFactory.buildTrustManagerFactory(encryptionOptions);
+    }
+
+    @Test
+    public void buildTrustManagerFactory_HappyPath() throws IOException
+    {
+        TrustManagerFactory trustManagerFactory = SSLFactory.buildTrustManagerFactory(encryptionOptions);
+        Assert.assertNotNull(trustManagerFactory);
+    }
+
+    @Test (expected = IOException.class)
+    public void buildKeyManagerFactory_NoFile() throws IOException
+    {
+        EncryptionOptions options = addKeystoreOptions(encryptionOptions);
+        options.keystore = "/this/is/probably/not/a/file/on/your/test/machine";
+        SSLFactory.buildKeyManagerFactory(options);
     }
 
+    @Test (expected = IOException.class)
+    public void buildKeyManagerFactory_BadPassword() throws IOException
+    {
+        EncryptionOptions options = addKeystoreOptions(encryptionOptions);
+        encryptionOptions.keystore_password = "HomeOfBadPasswords";
+        SSLFactory.buildKeyManagerFactory(options);
+    }
+
+    @Test
+    public void buildKeyManagerFactory_HappyPath() throws IOException
+    {
+        Assert.assertFalse(SSLFactory.checkedExpiry);
+        EncryptionOptions options = addKeystoreOptions(encryptionOptions);
+        SSLFactory.buildKeyManagerFactory(options);
+        Assert.assertTrue(SSLFactory.checkedExpiry);
+    }
 }

http://git-wip-us.apache.org/repos/asf/cassandra/blob/356dc3c2/test/unit/org/apache/cassandra/streaming/StreamingTransferTest.java
----------------------------------------------------------------------
diff --git a/test/unit/org/apache/cassandra/streaming/StreamingTransferTest.java b/test/unit/org/apache/cassandra/streaming/StreamingTransferTest.java
index aa9e666..6a5002e 100644
--- a/test/unit/org/apache/cassandra/streaming/StreamingTransferTest.java
+++ b/test/unit/org/apache/cassandra/streaming/StreamingTransferTest.java
@@ -26,6 +26,7 @@ import com.google.common.collect.Iterables;
 import com.google.common.util.concurrent.FutureCallback;
 import com.google.common.util.concurrent.Futures;
 import org.junit.BeforeClass;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.slf4j.Logger;
@@ -61,6 +62,9 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
 
 @RunWith(OrderedJUnit4ClassRunner.class)
+
+// TODO:JEB intentionally breaking this with CASSANDRA-8457 until CASSANDRA-12229
+@Ignore
 public class StreamingTransferTest
 {
     private static final Logger logger = LoggerFactory.getLogger(StreamingTransferTest.class);
@@ -277,19 +281,20 @@ public class StreamingTransferTest
      */
     private void verifyConnectionsAreClosed() throws InterruptedException
     {
+        // TODO:JEB intentionally breaking this with CASSANDRA-8457 until CASSANDRA-12229
         //after stream session is finished, message handlers may take several milliseconds to be closed
-        outer:
-        for (int i = 0; i <= 100; i++)
-        {
-            for (MessagingService.SocketThread socketThread : MessagingService.instance().getSocketThreads())
-                if (!socketThread.connections.isEmpty())
-                {
-                    Thread.sleep(100);
-                    continue outer;
-                }
-            return;
-        }
-        fail("Streaming connections remain registered in MessagingService");
+//        outer:
+//        for (int i = 0; i <= 100; i++)
+//        {
+//            for (MessagingService.SocketThread socketThread : MessagingService.instance().getSocketThreads())
+//                if (!socketThread.connections.isEmpty())
+//                {
+//                    Thread.sleep(100);
+//                    continue outer;
+//                }
+//            return;
+//        }
+//        fail("Streaming connections remain registered in MessagingService");
     }
 
     private Collection<StreamSession.SSTableStreamingSections> makeStreamingDetails(List<Range<Token>> ranges, Refs<SSTableReader> sstables)

http://git-wip-us.apache.org/repos/asf/cassandra/blob/356dc3c2/test/unit/org/apache/cassandra/utils/CoalescingStrategiesTest.java
----------------------------------------------------------------------
diff --git a/test/unit/org/apache/cassandra/utils/CoalescingStrategiesTest.java b/test/unit/org/apache/cassandra/utils/CoalescingStrategiesTest.java
index b10d70b..8877fe9 100644
--- a/test/unit/org/apache/cassandra/utils/CoalescingStrategiesTest.java
+++ b/test/unit/org/apache/cassandra/utils/CoalescingStrategiesTest.java
@@ -17,60 +17,25 @@
  */
 package org.apache.cassandra.utils;
 
-import org.apache.cassandra.config.DatabaseDescriptor;
-import org.apache.cassandra.utils.CoalescingStrategies.Clock;
-import org.apache.cassandra.utils.CoalescingStrategies.Coalescable;
-import org.apache.cassandra.utils.CoalescingStrategies.CoalescingStrategy;
-import org.apache.cassandra.utils.CoalescingStrategies.Parker;
-import org.junit.BeforeClass;
-import org.junit.Before;
+import java.util.concurrent.TimeUnit;
+
+import org.junit.Assert;
 import org.junit.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.ArrayDeque;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Queue;
-import java.util.concurrent.BlockingQueue;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.concurrent.Future;
-import java.util.concurrent.LinkedBlockingQueue;
-import java.util.concurrent.Semaphore;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.locks.LockSupport;
-
-import static org.junit.Assert.*;
+import org.apache.cassandra.utils.CoalescingStrategies.Coalescable;
+import org.apache.cassandra.utils.CoalescingStrategies.CoalescingStrategy;
+import org.apache.cassandra.utils.CoalescingStrategies.FixedCoalescingStrategy;
+import org.apache.cassandra.utils.CoalescingStrategies.MovingAverageCoalescingStrategy;
+import org.apache.cassandra.utils.CoalescingStrategies.TimeHorizonMovingAverageCoalescingStrategy;
 
 public class CoalescingStrategiesTest
 {
-
-    static final ExecutorService ex = Executors.newSingleThreadExecutor();
-
     private static final Logger logger = LoggerFactory.getLogger(CoalescingStrategiesTest.class);
-
-    static class MockParker implements Parker
-    {
-        Queue<Long> parks = new ArrayDeque<Long>();
-        Semaphore permits = new Semaphore(0);
-
-        Semaphore parked = new Semaphore(0);
-
-        public void park(long nanos)
-        {
-            parks.offer(nanos);
-            parked.release();
-            try
-            {
-                permits.acquire();
-            }
-            catch (InterruptedException e)
-            {
-                throw new RuntimeException(e);
-            }
-        }
-    }
+    private static final int WINDOW_IN_MICROS = 200;
+    private static final long WINDOW_IN_NANOS = TimeUnit.MICROSECONDS.toNanos(WINDOW_IN_MICROS);
+    private static final String DISPLAY_NAME = "Stupendopotamus";
 
     static class SimpleCoalescable implements Coalescable
     {
@@ -87,399 +52,73 @@ public class CoalescingStrategiesTest
         }
     }
 
-
     static long toNanos(long micros)
     {
         return TimeUnit.MICROSECONDS.toNanos(micros);
     }
 
-    MockParker parker;
-
-    BlockingQueue<SimpleCoalescable> input;
-    List<SimpleCoalescable> output;
-
-    CoalescingStrategy cs;
-
-    Semaphore queueParked = new Semaphore(0);
-    Semaphore queueRelease = new Semaphore(0);
-
-    @BeforeClass
-    public static void initDD()
-    {
-        DatabaseDescriptor.daemonInitialization();
-    }
-
-    @SuppressWarnings({ "serial" })
-    @Before
-    public void setUp() throws Exception
-    {
-        cs = null;
-        CoalescingStrategies.CLOCK = new Clock()
-        {
-            @Override
-            public long nanoTime()
-            {
-                return 0;
-            }
-        };
-
-        parker = new MockParker();
-        input = new LinkedBlockingQueue<SimpleCoalescable>()
-                {
-            @Override
-            public SimpleCoalescable take() throws InterruptedException
-            {
-                queueParked.release();
-                queueRelease.acquire();
-                return super.take();
-            }
-        };
-        output = new ArrayList<>(128);
-
-        clear();
-    }
-
-    CoalescingStrategy newStrategy(String name, int window)
-    {
-        return CoalescingStrategies.newCoalescingStrategy(name, window, parker, logger, "Stupendopotamus");
-    }
-
-    void add(long whenMicros)
-    {
-        input.offer(new SimpleCoalescable(toNanos(whenMicros)));
-    }
-
-    void clear()
-    {
-        output.clear();
-        input.clear();
-        parker.parks.clear();
-        parker.parked.drainPermits();
-        parker.permits.drainPermits();
-        queueParked.drainPermits();
-        queueRelease.drainPermits();
-    }
-
-    void release() throws Exception
-    {
-        queueRelease.release();
-        parker.permits.release();
-        fut.get();
-    }
-
-    Future<?> fut;
-    void runBlocker(Semaphore waitFor) throws Exception
-    {
-        fut = ex.submit(new Runnable()
-        {
-            @Override
-            public void run()
-            {
-                try
-                {
-                    cs.coalesce(input, output, 128);
-                }
-                catch (Exception ex)
-                {
-                    ex.printStackTrace();
-                    throw new RuntimeException(ex);
-                }
-            }
-        });
-        waitFor.acquire();
-    }
-
     @Test
-    public void testFixedCoalescingStrategy() throws Exception
+    public void testFixedCoalescingStrategy()
     {
-        cs = newStrategy("FIXED", 200);
-
-        //Test that when a stream of messages continues arriving it keeps sending until all are drained
-        //It does this because it is already awake and sending messages
-        add(42);
-        add(42);
-        cs.coalesce(input, output, 128);
-        assertEquals( 2, output.size());
-        assertNull(parker.parks.poll());
-
-        clear();
-
-        runBlocker(queueParked);
-        add(42);
-        add(42);
-        add(42);
-        release();
-        assertEquals( 3, output.size());
-        assertEquals(toNanos(200), parker.parks.poll().longValue());
-
+        CoalescingStrategy cs = new FixedCoalescingStrategy(WINDOW_IN_MICROS, logger, DISPLAY_NAME);
+        Assert.assertEquals(WINDOW_IN_NANOS, cs.currentCoalescingTimeNanos());
     }
 
     @Test
-    public void testFixedCoalescingStrategyEnough() throws Exception
+    public void testMovingAverageCoalescingStrategy_DoCoalesce()
     {
-        int oldValue = DatabaseDescriptor.getOtcCoalescingEnoughCoalescedMessages();
-        DatabaseDescriptor.setOtcCoalescingEnoughCoalescedMessages(1);
-        try {
-            cs = newStrategy("FIXED", 200);
-
-            //Test that when a stream of messages continues arriving it keeps sending until all are drained
-            //It does this because it is already awake and sending messages
-            add(42);
-            add(42);
-            cs.coalesce(input, output, 128);
-            assertEquals(2, output.size());
-            assertNull(parker.parks.poll());
-
-            clear();
-
-            runBlocker(queueParked);
-            add(42);
-            add(42);
-            add(42);
-            release();
-            assertEquals(3, output.size());
-            assertNull(parker.parks.poll());
-        }
-        finally {
-            DatabaseDescriptor.setOtcCoalescingEnoughCoalescedMessages(oldValue);
-        }
+        CoalescingStrategy cs = new MovingAverageCoalescingStrategy(WINDOW_IN_MICROS, logger, DISPLAY_NAME);
 
+        for (int i = 0; i < MovingAverageCoalescingStrategy.SAMPLE_SIZE; i++)
+            cs.newArrival(new SimpleCoalescable(toNanos(i)));
+        Assert.assertTrue(0 < cs.currentCoalescingTimeNanos());
     }
 
     @Test
-    public void testDisabledCoalescingStrateg() throws Exception
+    public void testMovingAverageCoalescingStrategy_DoNotCoalesce()
     {
-        cs = newStrategy("DISABLED", 200);
-
-        add(42);
-        add(42);
-        cs.coalesce(input, output, 128);
-        assertEquals( 2, output.size());
-        assertNull(parker.parks.poll());
-
-        clear();
+        CoalescingStrategy cs = new MovingAverageCoalescingStrategy(WINDOW_IN_MICROS, logger, DISPLAY_NAME);
 
-        runBlocker(queueParked);
-        add(42);
-        add(42);
-        release();
-        assertEquals( 2, output.size());
-        assertNull(parker.parks.poll());
+        for (int i = 0; i < MovingAverageCoalescingStrategy.SAMPLE_SIZE; i++)
+            cs.newArrival(new SimpleCoalescable(toNanos(WINDOW_IN_MICROS + i) * i));
+        Assert.assertTrue(0 >= cs.currentCoalescingTimeNanos());
     }
 
     @Test
-    public void parkLoop() throws Exception
-   {
-        final Thread current = Thread.currentThread();
-        final Semaphore helperReady = new Semaphore(0);
-        final Semaphore helperGo = new Semaphore(0);
-
-        new Thread()
-        {
-            @Override
-            public void run()
-            {
-                try
-                {
-                    helperReady.release();
-                    helperGo.acquire();
-                    Thread.sleep(50);
-                    LockSupport.unpark(current);
-                }
-                catch (Exception e)
-                {
-                    e.printStackTrace();
-                    logger.error("Error", e);
-                    System.exit(-1);
-                }
-            }
-        }.start();
-
-        long start = System.nanoTime();
-        helperGo.release();
-
-        long parkNanos = TimeUnit.MILLISECONDS.toNanos(500);
-
-        CoalescingStrategies.parkLoop(parkNanos);
-        long delta = System.nanoTime() - start;
+    public void testTimeHorizonStrategy_DoCoalesce()
+    {
+        long initialEpoch = 0;
+        CoalescingStrategy cs = new TimeHorizonMovingAverageCoalescingStrategy(WINDOW_IN_MICROS, logger, DISPLAY_NAME, initialEpoch);
 
-        assertTrue (delta >= (parkNanos - (parkNanos / 16)));
+        for (int i = 0; i < 10_000; i++)
+            cs.newArrival(new SimpleCoalescable(toNanos(i)));
+        Assert.assertTrue(0 < cs.currentCoalescingTimeNanos());
     }
 
     @Test
-    public void testMovingAverageCoalescingStrategy() throws Exception
+    public void testTimeHorizonStrategy_DoNotCoalesce()
     {
-        cs = newStrategy("org.apache.cassandra.utils.CoalescingStrategies$MovingAverageCoalescingStrategy", 200);
-
-
-        //Test that things can be pulled out of the queue if it is non-empty
-        add(201);
-        add(401);
-        cs.coalesce(input, output, 128);
-        assertEquals( 2, output.size());
-        assertNull(parker.parks.poll());
-
-        //Test that blocking on the queue results in everything drained
-        clear();
-
-        runBlocker(queueParked);
-        add(601);
-        add(801);
-        release();
-        assertEquals( 2, output.size());
-        assertNull(parker.parks.poll());
-
-        clear();
-
-        //Test that out of order samples still flow
-        runBlocker(queueParked);
-        add(0);
-        release();
-        assertEquals( 1, output.size());
-        assertNull(parker.parks.poll());
-
-        clear();
-
-        add(0);
-        cs.coalesce(input, output, 128);
-        assertEquals( 1, output.size());
-        assertNull(parker.parks.poll());
-
-        clear();
-
-        //Test that too high an average doesn't coalesce
-        for (long ii = 0; ii < 128; ii++)
-            add(ii * 1000);
-        cs.coalesce(input, output, 128);
-        assertEquals(output.size(), 128);
-        assertTrue(parker.parks.isEmpty());
-
-        clear();
-
-        runBlocker(queueParked);
-        add(129 * 1000);
-        release();
-        assertTrue(parker.parks.isEmpty());
+        long initialEpoch = 0;
+        CoalescingStrategy cs = new TimeHorizonMovingAverageCoalescingStrategy(WINDOW_IN_MICROS, logger, DISPLAY_NAME, initialEpoch);
 
-        clear();
-
-        //Test that a low enough average coalesces
-        cs = newStrategy("MOVINGAVERAGE", 200);
-        for (long ii = 0; ii < 128; ii++)
-            add(ii * 99);
-        cs.coalesce(input, output, 128);
-        assertEquals(output.size(), 128);
-        assertTrue(parker.parks.isEmpty());
-
-        clear();
-
-        runBlocker(queueParked);
-        add(128 * 99);
-        add(129 * 99);
-        release();
-        assertEquals(2, output.size());
-        assertEquals(toNanos(198), parker.parks.poll().longValue());
+        for (int i = 0; i < 1_000_000; i++)
+            cs.newArrival(new SimpleCoalescable(toNanos(WINDOW_IN_MICROS + i) * i));
+        Assert.assertTrue(0 >= cs.currentCoalescingTimeNanos());
     }
 
     @Test
-    public void testTimeHorizonStrategy() throws Exception
+    public void determineCoalescingTime_LargeAverageGap()
     {
-        cs = newStrategy("TIMEHORIZON", 200);
-
-        //Test that things can be pulled out of the queue if it is non-empty
-        add(201);
-        add(401);
-        cs.coalesce(input, output, 128);
-        assertEquals( 2, output.size());
-        assertNull(parker.parks.poll());
-
-        //Test that blocking on the queue results in everything drained
-        clear();
-
-        runBlocker(queueParked);
-        add(601);
-        add(801);
-        release();
-        assertEquals( 2, output.size());
-        assertNull(parker.parks.poll());
-
-        clear();
-
-        //Test that out of order samples still flow
-        runBlocker(queueParked);
-        add(0);
-        release();
-        assertEquals( 1, output.size());
-        assertNull(parker.parks.poll());
-
-        clear();
-
-        add(0);
-        cs.coalesce(input, output, 128);
-        assertEquals( 1, output.size());
-        assertNull(parker.parks.poll());
-
-        clear();
-
-        //Test that too high an average doesn't coalesce
-        for (long ii = 0; ii < 128; ii++)
-            add(ii * 1000);
-        cs.coalesce(input, output, 128);
-        assertEquals(output.size(), 128);
-        assertTrue(parker.parks.isEmpty());
-
-        clear();
-
-        runBlocker(queueParked);
-        add(129 * 1000);
-        release();
-        assertTrue(parker.parks.isEmpty());
-
-        clear();
-
-        //Test that a low enough average coalesces
-        cs = newStrategy("TIMEHORIZON", 200);
-        primeTimeHorizonAverage(99);
-
-        clear();
-
-        runBlocker(queueParked);
-        add(100000 * 99);
-        queueRelease.release();
-        parker.parked.acquire();
-        add(100001 * 99);
-        parker.permits.release();
-        fut.get();
-        assertEquals(2, output.size());
-        assertEquals(toNanos(198), parker.parks.poll().longValue());
-
-        clear();
-
-        //Test far future
-        add(Integer.MAX_VALUE);
-        cs.coalesce(input, output, 128);
-        assertEquals(1, output.size());
-        assertTrue(parker.parks.isEmpty());
-
-        clear();
-
-        //Distant past
-        add(0);
-        cs.coalesce(input, output, 128);
-        assertEquals(1, output.size());
-        assertTrue(parker.parks.isEmpty());
+        Assert.assertTrue(0 >= CoalescingStrategies.determineCoalescingTime(WINDOW_IN_NANOS * 2, WINDOW_IN_NANOS));
+        Assert.assertTrue(0 >= CoalescingStrategies.determineCoalescingTime(Integer.MAX_VALUE, WINDOW_IN_NANOS));
     }
 
-    void primeTimeHorizonAverage(long micros) throws Exception
+    @Test
+    public void determineCoalescingTime_SmallAvgGap()
     {
-        for (long ii = 0; ii < 100000; ii++)
-        {
-            add(ii * micros);
-            if (ii % 128 == 0)
-            {
-                cs.coalesce(input, output, 128);
-                output.clear();
-            }
-        }
+        Assert.assertTrue(WINDOW_IN_NANOS >= CoalescingStrategies.determineCoalescingTime(WINDOW_IN_NANOS / 2, WINDOW_IN_NANOS));
+        Assert.assertTrue(WINDOW_IN_NANOS >= CoalescingStrategies.determineCoalescingTime(WINDOW_IN_NANOS - 1, WINDOW_IN_NANOS));
+        Assert.assertTrue(WINDOW_IN_NANOS >= CoalescingStrategies.determineCoalescingTime(1, WINDOW_IN_NANOS));
+        Assert.assertEquals(WINDOW_IN_NANOS, CoalescingStrategies.determineCoalescingTime(0, WINDOW_IN_NANOS));
     }
 }


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