added system test for max multicast flow control strategy.

aeron-system-tests/src/test/java/io/aeron/FlowControlStrategiesTest.java

@@ -0,0 +1,203 @@
+/*
+ * Copyright 2014 - 2016 Real Logic Ltd.
+ *
+ * Licensed 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 io.aeron;
+
+import io.aeron.driver.MaxMulticastFlowControl;
+import io.aeron.driver.MediaDriver;
+import org.agrona.DirectBuffer;
+import org.junit.After;
+import org.junit.Test;
+import io.aeron.driver.ThreadingMode;
+import io.aeron.logbuffer.FragmentHandler;
+import io.aeron.logbuffer.Header;
+import io.aeron.protocol.DataHeaderFlyweight;
+import org.agrona.IoUtil;
+import org.agrona.concurrent.UnsafeBuffer;
+
+import java.io.File;
+import java.util.UUID;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import static org.mockito.Mockito.*;
+
+/**
+ * Tests requiring multiple embedded drivers for FlowControl strategies
+ */
+public class FlowControlStrategiesTest
+{
+    public static final String MULTICAST_URI = "aeron:udp?endpoint=224.20.30.39:54326|interface=localhost";
+
+    private static final int STREAM_ID = 1;
+    private static final ThreadingMode THREADING_MODE = ThreadingMode.SHARED;
+
+    private static final int TERM_BUFFER_LENGTH = 64 * 1024;
+    private static final int NUM_MESSAGES_PER_TERM = 64;
+    private static final int MESSAGE_LENGTH = (TERM_BUFFER_LENGTH / NUM_MESSAGES_PER_TERM) - DataHeaderFlyweight.HEADER_LENGTH;
+    private static final String ROOT_DIR =
+        IoUtil.tmpDirName() + "aeron-system-tests-" + UUID.randomUUID().toString() + File.separator;
+
+    private final MediaDriver.Context driverAContext = new MediaDriver.Context();
+    private final MediaDriver.Context driverBContext = new MediaDriver.Context();
+    private final Aeron.Context aeronAContext = new Aeron.Context();
+    private final Aeron.Context aeronBContext = new Aeron.Context();
+
+    private Aeron clientA;
+    private Aeron clientB;
+    private MediaDriver driverA;
+    private MediaDriver driverB;
+    private Publication publication;
+    private Subscription subscriptionA;
+    private Subscription subscriptionB;
+
+    private UnsafeBuffer buffer = new UnsafeBuffer(new byte[MESSAGE_LENGTH]);
+    private FragmentHandler fragmentHandlerA = mock(FragmentHandler.class);
+    private FragmentHandler fragmentHandlerB = mock(FragmentHandler.class);
+
+    private void launch()
+    {
+        final String baseDirA = ROOT_DIR + "A";
+        final String baseDirB = ROOT_DIR + "B";
+
+        buffer.putInt(0, 1);
+
+        driverAContext.publicationTermBufferLength(TERM_BUFFER_LENGTH)
+            .aeronDirectoryName(baseDirA)
+            .threadingMode(THREADING_MODE);
+
+        aeronAContext.aeronDirectoryName(driverAContext.aeronDirectoryName());
+
+        driverBContext.publicationTermBufferLength(TERM_BUFFER_LENGTH)
+            .aeronDirectoryName(baseDirB)
+            .threadingMode(THREADING_MODE);
+
+        aeronBContext.aeronDirectoryName(driverBContext.aeronDirectoryName());
+
+        driverA = MediaDriver.launch(driverAContext);
+        driverB = MediaDriver.launch(driverBContext);
+        clientA = Aeron.connect(aeronAContext);
+        clientB = Aeron.connect(aeronBContext);
+    }
+
+    @After
+    public void closeEverything()
+    {
+        publication.close();
+        subscriptionA.close();
+        subscriptionB.close();
+
+        clientB.close();
+        clientA.close();
+        driverB.close();
+        driverA.close();
+
+        IoUtil.delete(new File(ROOT_DIR), true);
+    }
+
+    @Test(timeout = 10000)
+    public void shouldSpinUpAndShutdown() throws Exception
+    {
+        launch();
+
+        publication = clientA.addPublication(MULTICAST_URI, STREAM_ID);
+        subscriptionA = clientA.addSubscription(MULTICAST_URI, STREAM_ID);
+        subscriptionB = clientB.addSubscription(MULTICAST_URI, STREAM_ID);
+
+        while (subscriptionA.hasNoImages() && subscriptionB.hasNoImages())
+        {
+            Thread.sleep(1);
+        }
+    }
+
+    @Test(timeout = 10000)
+    public void shouldTimeoutImageWhenBehindForTooLong() throws Exception
+    {
+        final int numMessagesToSend = NUM_MESSAGES_PER_TERM * 3;
+        final CountDownLatch unavailableCountDownLatch = new CountDownLatch(1);
+        final CountDownLatch availableCountDownLatch = new CountDownLatch(2);
+
+        driverBContext.imageLivenessTimeoutNs(TimeUnit.MILLISECONDS.toNanos(500));
+        driverBContext.multicastFlowControlSupplier(
+            (udpChannel, streamId, registrationId) -> new MaxMulticastFlowControl());
+
+        aeronAContext.availableImageHandler(mock(AvailableImageHandler.class));
+        aeronBContext.availableImageHandler((image) -> availableCountDownLatch.countDown());
+        aeronBContext.unavailableImageHandler((image) -> unavailableCountDownLatch.countDown());
+
+        launch();
+
+        publication = clientA.addPublication(MULTICAST_URI, STREAM_ID);
+        subscriptionA = clientA.addSubscription(MULTICAST_URI, STREAM_ID);
+        subscriptionB = clientB.addSubscription(MULTICAST_URI, STREAM_ID);
+
+        while (!publication.isConnected() && subscriptionA.hasNoImages() && subscriptionB.hasNoImages())
+        {
+            Thread.yield();
+        }
+
+        for (int i = 0; i < numMessagesToSend; i++)
+        {
+            while (publication.offer(buffer, 0, buffer.capacity()) < 0L)
+            {
+                Thread.yield();
+            }
+
+            // A keeps up
+            final AtomicInteger fragmentsRead = new AtomicInteger();
+            SystemTestHelper.executeUntil(
+                () -> fragmentsRead.get() > 0,
+                (j) ->
+                {
+                    fragmentsRead.addAndGet(subscriptionA.poll(fragmentHandlerA, 10));
+                    Thread.yield();
+                },
+                Integer.MAX_VALUE,
+                TimeUnit.MILLISECONDS.toNanos(500));
+
+            fragmentsRead.set(0);
+
+            // B receives slowly and eventually can't keep up
+            if (i % 10 == 0)
+            {
+                SystemTestHelper.executeUntil(
+                    () -> fragmentsRead.get() > 0,
+                    (j) ->
+                    {
+                        fragmentsRead.addAndGet(subscriptionB.poll(fragmentHandlerB, 1));
+                        Thread.yield();
+                    },
+                    Integer.MAX_VALUE,
+                    TimeUnit.MILLISECONDS.toNanos(500));
+            }
+        }
+
+        unavailableCountDownLatch.await();
+        availableCountDownLatch.await();
+
+        verify(fragmentHandlerA, times(numMessagesToSend)).onFragment(
+            any(DirectBuffer.class),
+            anyInt(),
+            eq(MESSAGE_LENGTH),
+            any(Header.class));
+
+        verify(fragmentHandlerB, atMost(numMessagesToSend - 1)).onFragment(
+            any(DirectBuffer.class),
+            anyInt(),
+            eq(MESSAGE_LENGTH),
+            any(Header.class));
+    }
+}