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From ieme...@apache.org
Subject [08/55] [abbrv] beam git commit: Refactor classes into packages
Date Wed, 23 Aug 2017 17:09:16 GMT
http://git-wip-us.apache.org/repos/asf/beam/blob/a7f9f7d0/integration/java/nexmark/src/test/java/org/apache/beam/integration/nexmark/sources/UnboundedEventSourceTest.java
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diff --git a/integration/java/nexmark/src/test/java/org/apache/beam/integration/nexmark/sources/UnboundedEventSourceTest.java
b/integration/java/nexmark/src/test/java/org/apache/beam/integration/nexmark/sources/UnboundedEventSourceTest.java
new file mode 100644
index 0000000..15e17a8
--- /dev/null
+++ b/integration/java/nexmark/src/test/java/org/apache/beam/integration/nexmark/sources/UnboundedEventSourceTest.java
@@ -0,0 +1,110 @@
+/*
+ * 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.beam.integration.nexmark.sources;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.HashSet;
+import java.util.Random;
+import java.util.Set;
+
+import org.apache.beam.integration.nexmark.NexmarkConfiguration;
+import org.apache.beam.integration.nexmark.model.Event;
+import org.apache.beam.sdk.Pipeline;
+import org.apache.beam.sdk.io.UnboundedSource.CheckpointMark;
+import org.apache.beam.sdk.io.UnboundedSource.UnboundedReader;
+import org.apache.beam.sdk.options.PipelineOptions;
+import org.apache.beam.sdk.testing.TestPipeline;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/**
+ * Test UnboundedEventSource.
+ */
+@RunWith(JUnit4.class)
+public class UnboundedEventSourceTest {
+  private GeneratorConfig makeConfig(long n) {
+    return new GeneratorConfig(
+        NexmarkConfiguration.DEFAULT, System.currentTimeMillis(), 0, n, 0);
+  }
+
+  /**
+   * Helper for tracking which ids we've seen (so we can detect dups) and
+   * confirming reading events match the model events.
+   */
+  private static class EventIdChecker {
+    private Set<Long> seenPersonIds = new HashSet<>();
+    private Set<Long> seenAuctionIds = new HashSet<>();
+
+    public void add(Event event) {
+      if (event.newAuction != null) {
+        assertTrue(seenAuctionIds.add(event.newAuction.id));
+      } else if (event.newPerson != null) {
+        assertTrue(seenPersonIds.add(event.newPerson.id));
+      }
+    }
+
+    public void add(int n, UnboundedReader<Event> reader, Generator modelGenerator)
+        throws IOException {
+      for (int i = 0; i < n; i++) {
+        assertTrue(modelGenerator.hasNext());
+        Event modelEvent = modelGenerator.next().getValue();
+        assertTrue(reader.advance());
+        Event actualEvent = reader.getCurrent();
+        assertEquals(modelEvent.toString(), actualEvent.toString());
+        add(actualEvent);
+      }
+    }
+  }
+
+  /**
+   * Check aggressively checkpointing and resuming a reader gives us exactly the
+   * same event stream as reading directly.
+   */
+  @Test
+  public void resumeFromCheckpoint() throws IOException {
+    Random random = new Random(297);
+    int n = 47293;
+    GeneratorConfig config = makeConfig(n);
+    Generator modelGenerator = new Generator(config);
+
+    EventIdChecker checker = new EventIdChecker();
+    PipelineOptions options = TestPipeline.testingPipelineOptions();
+    Pipeline p = TestPipeline.create(options);
+    UnboundedEventSource source = new UnboundedEventSource(config, 1, 0, false);
+    UnboundedReader<Event> reader = source.createReader(options, null);
+
+    while (n > 0) {
+      int m = Math.min(459 + random.nextInt(455), n);
+      System.out.printf("reading %d...\n", m);
+      checker.add(m, reader, modelGenerator);
+      n -= m;
+      System.out.printf("splitting with %d remaining...\n", n);
+      CheckpointMark checkpointMark = reader.getCheckpointMark();
+      assertTrue(checkpointMark instanceof Generator.Checkpoint);
+      reader = source.createReader(options, (Generator.Checkpoint) checkpointMark);
+    }
+
+    assertFalse(reader.advance());
+  }
+}


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