Java tutorial
/** * 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.tajo.storage; import com.google.common.collect.Lists; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.FileSystem; import org.apache.hadoop.fs.Path; import org.apache.hadoop.hdfs.*; import org.apache.tajo.catalog.CatalogUtil; import org.apache.tajo.catalog.Schema; import org.apache.tajo.catalog.TableMeta; import org.apache.tajo.catalog.proto.CatalogProtos.StoreType; import org.apache.tajo.common.TajoDataTypes.Type; import org.apache.tajo.conf.TajoConf; import org.apache.tajo.datum.Datum; import org.apache.tajo.datum.DatumFactory; import org.apache.tajo.storage.fragment.FileFragment; import org.apache.tajo.util.CommonTestingUtil; import org.junit.After; import org.junit.Before; import org.junit.Test; import java.io.File; import java.io.IOException; import java.util.List; import java.util.UUID; import static org.junit.Assert.*; public class TestStorageManager { private TajoConf conf; private static String TEST_PATH = "target/test-data/TestStorageManager"; StorageManager sm = null; private Path testDir; private FileSystem fs; @Before public void setUp() throws Exception { conf = new TajoConf(); testDir = CommonTestingUtil.getTestDir(TEST_PATH); fs = testDir.getFileSystem(conf); sm = StorageManager.getStorageManager(conf, testDir); } @After public void tearDown() throws Exception { } @Test public final void testGetScannerAndAppender() throws IOException { Schema schema = new Schema(); schema.addColumn("id", Type.INT4); schema.addColumn("age", Type.INT4); schema.addColumn("name", Type.TEXT); TableMeta meta = CatalogUtil.newTableMeta(StoreType.CSV); Tuple[] tuples = new Tuple[4]; for (int i = 0; i < tuples.length; i++) { tuples[i] = new VTuple(3); tuples[i].put(new Datum[] { DatumFactory.createInt4(i), DatumFactory.createInt4(i + 32), DatumFactory.createText("name" + i) }); } Path path = StorageUtil.concatPath(testDir, "testGetScannerAndAppender", "table.csv"); fs.mkdirs(path.getParent()); Appender appender = StorageManager.getStorageManager(conf).getAppender(meta, schema, path); appender.init(); for (Tuple t : tuples) { appender.addTuple(t); } appender.close(); Scanner scanner = StorageManager.getStorageManager(conf).getFileScanner(meta, schema, path); scanner.init(); int i = 0; while (scanner.next() != null) { i++; } assertEquals(4, i); } @Test public void testGetSplit() throws Exception { final Configuration conf = new HdfsConfiguration(); String testDataPath = TEST_PATH + "/" + UUID.randomUUID().toString(); conf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, testDataPath); conf.setLong(DFSConfigKeys.DFS_NAMENODE_MIN_BLOCK_SIZE_KEY, 0); conf.setBoolean(DFSConfigKeys.DFS_HDFS_BLOCKS_METADATA_ENABLED, false); final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build(); int testCount = 10; Path tablePath = new Path("/testGetSplit"); try { DistributedFileSystem fs = cluster.getFileSystem(); // Create test partitions List<Path> partitions = Lists.newArrayList(); for (int i = 0; i < testCount; i++) { Path tmpFile = new Path(tablePath, String.valueOf(i)); DFSTestUtil.createFile(fs, new Path(tmpFile, "tmpfile.dat"), 10, (short) 2, 0xDEADDEADl); partitions.add(tmpFile); } assertTrue(fs.exists(tablePath)); StorageManager sm = StorageManager.getStorageManager(new TajoConf(conf), tablePath); Schema schema = new Schema(); schema.addColumn("id", Type.INT4); schema.addColumn("age", Type.INT4); schema.addColumn("name", Type.TEXT); TableMeta meta = CatalogUtil.newTableMeta(StoreType.CSV); List<FileFragment> splits = Lists.newArrayList(); // Get FileFragments in partition batch splits.addAll(sm.getSplits("data", meta, schema, partitions.toArray(new Path[partitions.size()]))); assertEquals(testCount, splits.size()); // -1 is unknown volumeId assertEquals(-1, splits.get(0).getDiskIds()[0]); splits.clear(); splits.addAll(sm.getSplits("data", meta, schema, partitions.subList(0, partitions.size() / 2).toArray(new Path[partitions.size() / 2]))); assertEquals(testCount / 2, splits.size()); assertEquals(1, splits.get(0).getHosts().length); assertEquals(-1, splits.get(0).getDiskIds()[0]); fs.close(); } finally { cluster.shutdown(); File dir = new File(testDataPath); dir.delete(); } } @Test public void testGetSplitWithBlockStorageLocationsBatching() throws Exception { final Configuration conf = new HdfsConfiguration(); String testDataPath = TEST_PATH + "/" + UUID.randomUUID().toString(); conf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, testDataPath); conf.setLong(DFSConfigKeys.DFS_NAMENODE_MIN_BLOCK_SIZE_KEY, 0); conf.setBoolean(DFSConfigKeys.DFS_HDFS_BLOCKS_METADATA_ENABLED, true); final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(2).build(); int testCount = 10; Path tablePath = new Path("/testGetSplitWithBlockStorageLocationsBatching"); try { DistributedFileSystem fs = cluster.getFileSystem(); // Create test files for (int i = 0; i < testCount; i++) { Path tmpFile = new Path(tablePath, "tmpfile" + i + ".dat"); DFSTestUtil.createFile(fs, tmpFile, 10, (short) 2, 0xDEADDEADl); } assertTrue(fs.exists(tablePath)); StorageManager sm = StorageManager.getStorageManager(new TajoConf(conf), tablePath); Schema schema = new Schema(); schema.addColumn("id", Type.INT4); schema.addColumn("age", Type.INT4); schema.addColumn("name", Type.TEXT); TableMeta meta = CatalogUtil.newTableMeta(StoreType.CSV); List<FileFragment> splits = Lists.newArrayList(); splits.addAll(sm.getSplits("data", meta, schema, tablePath)); assertEquals(testCount, splits.size()); assertEquals(2, splits.get(0).getHosts().length); assertEquals(2, splits.get(0).getDiskIds().length); assertNotEquals(-1, splits.get(0).getDiskIds()[0]); fs.close(); } finally { cluster.shutdown(); File dir = new File(testDataPath); dir.delete(); } } }