svn commit: r1581661 - /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultiTableInputFormat.java

[li...@apache.org]

Author: liangxie
Date: Wed Mar 26 03:00:53 2014
New Revision: 1581661

URL: http://svn.apache.org/r1581661
Log:
HBASE-10774 Restore TestMultiTableInputFormat (Liu Shaohui)

Added:
    hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultiTableInputFormat.java

Added: hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultiTableInputFormat.java
URL: http://svn.apache.org/viewvc/hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultiTableInputFormat.java?rev=1581661&view=auto
==============================================================================
--- hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultiTableInputFormat.java (added)
+++ hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultiTableInputFormat.java Wed Mar 26 03:00:53 2014
@@ -0,0 +1,248 @@
+/**
+ * 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.hadoop.hbase.mapreduce;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.NavigableMap;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileUtil;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hbase.HBaseTestingUtility;
+import org.apache.hadoop.hbase.LargeTests;
+import org.apache.hadoop.hbase.client.HTable;
+import org.apache.hadoop.hbase.client.Result;
+import org.apache.hadoop.hbase.client.Scan;
+import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.io.NullWritable;
+import org.apache.hadoop.mapreduce.Job;
+import org.apache.hadoop.mapreduce.Reducer;
+import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+/**
+ * Tests various scan start and stop row scenarios. This is set in a scan and
+ * tested in a MapReduce job to see if that is handed over and done properly
+ * too.
+ */
+@Category(LargeTests.class)
+public class TestMultiTableInputFormat {
+
+  static final Log LOG = LogFactory.getLog(TestMultiTableInputFormat.class);
+  static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
+
+  static final String TABLE_NAME = "scantest";
+  static final byte[] INPUT_FAMILY = Bytes.toBytes("contents");
+  static final String KEY_STARTROW = "startRow";
+  static final String KEY_LASTROW = "stpRow";
+
+  @BeforeClass
+  public static void setUpBeforeClass() throws Exception {
+    // switch TIF to log at DEBUG level
+    TEST_UTIL.enableDebug(MultiTableInputFormat.class);
+    TEST_UTIL.enableDebug(MultiTableInputFormatBase.class);
+    // start mini hbase cluster
+    TEST_UTIL.startMiniCluster(3);
+    // create and fill table
+    for (int i = 0; i < 3; i++) {
+      HTable table =
+          TEST_UTIL.createTable(Bytes.toBytes(TABLE_NAME + String.valueOf(i)),
+              INPUT_FAMILY);
+      TEST_UTIL.createMultiRegions(TEST_UTIL.getConfiguration(), table, INPUT_FAMILY, 4);
+      TEST_UTIL.loadTable(table, INPUT_FAMILY, false);
+    }
+    // start MR cluster
+    TEST_UTIL.startMiniMapReduceCluster();
+  }
+
+  @AfterClass
+  public static void tearDownAfterClass() throws Exception {
+    TEST_UTIL.shutdownMiniMapReduceCluster();
+    TEST_UTIL.shutdownMiniCluster();
+  }
+  
+  @After
+  public void tearDown() throws Exception {
+    Configuration c = TEST_UTIL.getConfiguration();
+    FileUtil.fullyDelete(new File(c.get("hadoop.tmp.dir")));
+  }
+
+  /**
+   * Pass the key and value to reducer.
+   */
+  public static class ScanMapper extends
+      TableMapper<ImmutableBytesWritable, ImmutableBytesWritable> {
+    /**
+     * Pass the key and value to reduce.
+     *
+     * @param key The key, here "aaa", "aab" etc.
+     * @param value The value is the same as the key.
+     * @param context The task context.
+     * @throws IOException When reading the rows fails.
+     */
+    @Override
+    public void map(ImmutableBytesWritable key, Result value, Context context)
+        throws IOException, InterruptedException {
+      if (value.size() != 1) {
+        throw new IOException("There should only be one input column");
+      }
+      Map<byte[], NavigableMap<byte[], NavigableMap<Long, byte[]>>> cf =
+          value.getMap();
+      if (!cf.containsKey(INPUT_FAMILY)) {
+        throw new IOException("Wrong input columns. Missing: '" +
+            Bytes.toString(INPUT_FAMILY) + "'.");
+      }
+      String val = Bytes.toStringBinary(value.getValue(INPUT_FAMILY, null));
+      LOG.debug("map: key -> " + Bytes.toStringBinary(key.get()) +
+          ", value -> " + val);
+      context.write(key, key);
+    }
+  }
+
+  /**
+   * Checks the last and first keys seen against the scanner boundaries.
+   */
+  public static class ScanReducer
+      extends
+      Reducer<ImmutableBytesWritable, ImmutableBytesWritable,
+      NullWritable, NullWritable> {
+    private String first = null;
+    private String last = null;
+
+    protected void reduce(ImmutableBytesWritable key,
+        Iterable<ImmutableBytesWritable> values, Context context)
+        throws IOException, InterruptedException {
+      int count = 0;
+      for (ImmutableBytesWritable value : values) {
+        String val = Bytes.toStringBinary(value.get());
+        LOG.debug("reduce: key[" + count + "] -> " +
+            Bytes.toStringBinary(key.get()) + ", value -> " + val);
+        if (first == null) first = val;
+        last = val;
+        count++;
+      }
+      assertEquals(3, count);
+    }
+
+    protected void cleanup(Context context) throws IOException,
+        InterruptedException {
+      Configuration c = context.getConfiguration();
+      String startRow = c.get(KEY_STARTROW);
+      String lastRow = c.get(KEY_LASTROW);
+      LOG.info("cleanup: first -> \"" + first + "\", start row -> \"" +
+          startRow + "\"");
+      LOG.info("cleanup: last -> \"" + last + "\", last row -> \"" + lastRow +
+          "\"");
+      if (startRow != null && startRow.length() > 0) {
+        assertEquals(startRow, first);
+      }
+      if (lastRow != null && lastRow.length() > 0) {
+        assertEquals(lastRow, last);
+      }
+    }
+  }
+
+  @Test
+  public void testScanEmptyToEmpty() throws IOException, InterruptedException,
+      ClassNotFoundException {
+    testScan(null, null, null);
+  }
+  
+  @Test
+  public void testScanEmptyToAPP() throws IOException, InterruptedException,
+      ClassNotFoundException {
+    testScan(null, "app", "apo");
+  }
+
+  @Test
+  public void testScanOBBToOPP() throws IOException, InterruptedException,
+      ClassNotFoundException {
+    testScan("obb", "opp", "opo");
+  }
+
+  @Test
+  public void testScanYZYToEmpty() throws IOException, InterruptedException,
+      ClassNotFoundException {
+    testScan("yzy", null, "zzz");
+  }
+
+  /**
+   * Tests a MR scan using specific start and stop rows.
+   *
+   * @throws IOException
+   * @throws ClassNotFoundException
+   * @throws InterruptedException
+   */
+  private void testScan(String start, String stop, String last)
+      throws IOException, InterruptedException, ClassNotFoundException {
+    String jobName =
+        "Scan" + (start != null ? start.toUpperCase() : "Empty") + "To" +
+            (stop != null ? stop.toUpperCase() : "Empty");
+    LOG.info("Before map/reduce startup - job " + jobName);
+    Configuration c = new Configuration(TEST_UTIL.getConfiguration());
+    
+    c.set(KEY_STARTROW, start != null ? start : "");
+    c.set(KEY_LASTROW, last != null ? last : "");
+    
+    List<Scan> scans = new ArrayList<Scan>();
+    
+    for(int i=0; i<3; i++){
+      Scan scan = new Scan();
+      
+      scan.addFamily(INPUT_FAMILY);
+      scan.setAttribute(Scan.SCAN_ATTRIBUTES_TABLE_NAME, Bytes.toBytes(TABLE_NAME + i));
+      
+      if (start != null) {
+        scan.setStartRow(Bytes.toBytes(start));
+      }
+      if (stop != null) {
+        scan.setStopRow(Bytes.toBytes(stop));
+      }
+      
+      scans.add(scan);
+      
+      LOG.info("scan before: " + scan);
+    }
+    
+    Job job = new Job(c, jobName);
+
+    TableMapReduceUtil.initTableMapperJob(scans, ScanMapper.class,
+        ImmutableBytesWritable.class, ImmutableBytesWritable.class, job);
+    job.setReducerClass(ScanReducer.class);
+    job.setNumReduceTasks(1); // one to get final "first" and "last" key
+    FileOutputFormat.setOutputPath(job, new Path(job.getJobName()));
+    LOG.info("Started " + job.getJobName());
+    job.waitForCompletion(true);
+    assertTrue(job.isSuccessful());
+    LOG.info("After map/reduce completion - job " + jobName);
+  }
+}