Author: hairong
Date: Fri Nov 4 21:49:15 2011
New Revision: 1197801
URL: http://svn.apache.org/viewvc?rev=1197801&view=rev
Log:
Add the missing test file to HDFS-2477.
Added:
hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockInfo.java
Added:
hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockInfo.java
URL:
http://svn.apache.org/viewvc/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockInfo.java?rev=1197801&view=auto
==============================================================================
---
hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockInfo.java
(added)
+++
hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockInfo.java
Fri Nov 4 21:49:15 2011
@@ -0,0 +1,123 @@
+/**
+ * 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.hdfs.server.blockmanagement;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.Random;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.hdfs.protocol.Block;
+import org.apache.hadoop.hdfs.server.common.GenerationStamp;
+import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
+
+/**
+ * This class provides tests for BlockInfo class, which is used in BlocksMap.
+ * The test covers BlockList.listMoveToHead, used for faster block report
+ * processing in DatanodeDescriptor.reportDiff.
+ */
+
+public class TestBlockInfo {
+
+ private static final Log LOG = LogFactory
+ .getLog("org.apache.hadoop.hdfs.TestBlockInfo");
+
+ @Test
+ public void testBlockListMoveToHead() throws Exception {
+ LOG.info("BlockInfo moveToHead tests...");
+
+ final int MAX_BLOCKS = 10;
+
+ DatanodeDescriptor dd = new DatanodeDescriptor();
+ ArrayList<Block> blockList = new ArrayList<Block>(MAX_BLOCKS);
+ ArrayList<BlockInfo> blockInfoList = new ArrayList<BlockInfo>();
+ int headIndex;
+ int curIndex;
+
+ LOG.info("Building block list...");
+ for (int i = 0; i < MAX_BLOCKS; i++) {
+ blockList.add(new Block(i, 0, GenerationStamp.FIRST_VALID_STAMP));
+ blockInfoList.add(new BlockInfo(blockList.get(i), 3));
+ dd.addBlock(blockInfoList.get(i));
+
+ // index of the datanode should be 0
+ assertEquals("Find datanode should be 0", 0, blockInfoList.get(i)
+ .findDatanode(dd));
+ }
+
+ // list length should be equal to the number of blocks we inserted
+ LOG.info("Checking list length...");
+ assertEquals("Length should be MAX_BLOCK", MAX_BLOCKS, dd.numBlocks());
+ Iterator<BlockInfo> it = dd.getBlockIterator();
+ int len = 0;
+ while (it.hasNext()) {
+ it.next();
+ len++;
+ }
+ assertEquals("There should be MAX_BLOCK blockInfo's", MAX_BLOCKS, len);
+
+ headIndex = dd.getHead().findDatanode(dd);
+
+ LOG.info("Moving each block to the head of the list...");
+ for (int i = 0; i < MAX_BLOCKS; i++) {
+ curIndex = blockInfoList.get(i).findDatanode(dd);
+ headIndex = dd.moveBlockToHead(blockInfoList.get(i), curIndex,
headIndex);
+ // the moved element must be at the head of the list
+ assertEquals("Block should be at the head of the list now.",
+ blockInfoList.get(i), dd.getHead());
+ }
+
+ // move head of the list to the head - this should not change the list
+ LOG.info("Moving head to the head...");
+
+ BlockInfo temp = dd.getHead();
+ curIndex = 0;
+ headIndex = 0;
+ dd.moveBlockToHead(temp, curIndex, headIndex);
+ assertEquals(
+ "Moving head to the head of the list shopuld not change the list",
+ temp, dd.getHead());
+
+ // check all elements of the list against the original blockInfoList
+ LOG.info("Checking elements of the list...");
+ temp = dd.getHead();
+ assertNotNull("Head should not be null", temp);
+ int c = MAX_BLOCKS - 1;
+ while (temp != null) {
+ assertEquals("Expected element is not on the list",
+ blockInfoList.get(c--), temp);
+ temp = temp.getNext(0);
+ }
+
+ LOG.info("Moving random blocks to the head of the list...");
+ headIndex = dd.getHead().findDatanode(dd);
+ Random rand = new Random();
+ for (int i = 0; i < MAX_BLOCKS; i++) {
+ int j = rand.nextInt(MAX_BLOCKS);
+ curIndex = blockInfoList.get(j).findDatanode(dd);
+ headIndex = dd.moveBlockToHead(blockInfoList.get(j), curIndex,
headIndex);
+ // the moved element must be at the head of the list
+ assertEquals("Block should be at the head of the list now.",
+ blockInfoList.get(j), dd.getHead());
+ }
+ }
+}
\ No newline at end of file
