Java tutorial
/** * Copyright (C) 2014 Dasasian (damith@dasasian.com) * * 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 com.dasasian.chok.mapfile; import com.dasasian.chok.mapfile.testutil.MapFileTestResources; import com.dasasian.chok.node.IContentServer; import com.dasasian.chok.testutil.AbstractTest; import com.dasasian.chok.testutil.NodeConfigurationFactory; import com.dasasian.chok.testutil.TestNodeConfigurationFactory; import org.apache.hadoop.io.Text; import org.apache.hadoop.io.Writable; import org.apache.log4j.Logger; import org.junit.Test; import java.io.File; import java.util.*; import java.util.concurrent.atomic.AtomicInteger; import static org.junit.Assert.*; /** * Test for {@link MapFileServer }. */ public class MapFileServerTest extends AbstractTest { private static final String NODE_NAME = "TestNode"; private static final String SHARD_A_1 = "shard_A_1"; private static final String SHARD_A_2 = "shard_A_2"; private static final String SHARD_A_3 = "shard_A_3"; private static final String SHARD_A_4 = "shard_A_4"; private static final String SHARD_B_1 = "shard_B_1"; private static final String SHARD_B_2 = "shard_B_2"; @SuppressWarnings("unused") private static Logger LOG = Logger.getLogger(MapFileServerTest.class); private final NodeConfigurationFactory nodeConfigurationFactory = new TestNodeConfigurationFactory( temporaryFolder); @Test public void testShardA1() throws Exception { MapFileServer server = new MapFileServer(); server.init(NODE_NAME, nodeConfigurationFactory.getConfiguration()); server.addShard(SHARD_A_1, new File(MapFileTestResources.MAP_FILE_A, "a1")); assertNotNull(server.getShardMetaData(SHARD_A_1)); assertEquals("3", server.getShardMetaData(SHARD_A_1).get(IContentServer.SHARD_SIZE_KEY)); String[] shards = new String[] { SHARD_A_1 }; assertEquals("This is a test", getOneResult(server, "a.txt", shards)); assertMissing(server, "d.html", shards); assertMissing(server, "v.xml", shards); assertMissing(server, "y.xml", shards); assertMissing(server, "not-found", shards); server.shutdown(); } @Test public void testShardA2() throws Exception { MapFileServer server = new MapFileServer(); server.init(NODE_NAME, nodeConfigurationFactory.getConfiguration()); server.addShard(SHARD_A_2, new File(MapFileTestResources.MAP_FILE_A, "a2")); assertEquals("3", server.getShardMetaData(SHARD_A_2).get(IContentServer.SHARD_SIZE_KEY)); String[] shards = new String[] { SHARD_A_2 }; assertEquals("<b>test</b>", getOneResult(server, "d.html", shards)); assertMissing(server, "a.txt", shards); assertMissing(server, "v.xml", shards); assertMissing(server, "y.xml", shards); assertMissing(server, "not-found", shards); server.shutdown(); } @Test public void testMapFile1() throws Exception { MapFileServer server = new MapFileServer(); server.init(NODE_NAME, nodeConfigurationFactory.getConfiguration()); server.addShard(SHARD_A_1, new File(MapFileTestResources.MAP_FILE_A, "a1")); server.addShard(SHARD_A_2, new File(MapFileTestResources.MAP_FILE_A, "a2")); server.addShard(SHARD_A_3, new File(MapFileTestResources.MAP_FILE_A, "a3")); server.addShard(SHARD_A_4, new File(MapFileTestResources.MAP_FILE_A, "a4")); assertEquals("3", server.getShardMetaData(SHARD_A_1).get(IContentServer.SHARD_SIZE_KEY)); assertEquals("3", server.getShardMetaData(SHARD_A_2).get(IContentServer.SHARD_SIZE_KEY)); assertEquals("2", server.getShardMetaData(SHARD_A_3).get(IContentServer.SHARD_SIZE_KEY)); assertEquals("4", server.getShardMetaData(SHARD_A_4).get(IContentServer.SHARD_SIZE_KEY)); String[] shards = new String[] { SHARD_A_1, SHARD_A_2, SHARD_A_3, SHARD_A_4 }; assertEquals("This is a test", getOneResult(server, "a.txt", shards)); assertEquals("<b>test</b>", getOneResult(server, "d.html", shards)); assertEquals("Test in part 3", getOneResult(server, "h.txt", shards)); assertEquals("test data", getOneResult(server, "k.out", shards)); assertMissing(server, "v.xml", shards); assertMissing(server, "y.xml", shards); assertMissing(server, "not-found", shards); server.shutdown(); } @Test public void testBothMapFiles() throws Exception { MapFileServer server = new MapFileServer(); server.init(NODE_NAME, nodeConfigurationFactory.getConfiguration()); server.addShard(SHARD_A_1, new File(MapFileTestResources.MAP_FILE_A, "a1")); server.addShard(SHARD_A_2, new File(MapFileTestResources.MAP_FILE_A, "a2")); server.addShard(SHARD_A_3, new File(MapFileTestResources.MAP_FILE_A, "a3")); server.addShard(SHARD_A_4, new File(MapFileTestResources.MAP_FILE_A, "a4")); server.addShard(SHARD_B_1, new File(MapFileTestResources.MAP_FILE_B, "b1")); server.addShard(SHARD_B_2, new File(MapFileTestResources.MAP_FILE_B, "b2")); assertEquals("3", server.getShardMetaData(SHARD_A_1).get(IContentServer.SHARD_SIZE_KEY)); assertEquals("3", server.getShardMetaData(SHARD_A_2).get(IContentServer.SHARD_SIZE_KEY)); assertEquals("2", server.getShardMetaData(SHARD_A_3).get(IContentServer.SHARD_SIZE_KEY)); assertEquals("4", server.getShardMetaData(SHARD_A_4).get(IContentServer.SHARD_SIZE_KEY)); assertEquals("3", server.getShardMetaData(SHARD_B_1).get(IContentServer.SHARD_SIZE_KEY)); assertEquals("3", server.getShardMetaData(SHARD_B_2).get(IContentServer.SHARD_SIZE_KEY)); String[] shards = new String[] { SHARD_A_1, SHARD_A_2, SHARD_A_3, SHARD_A_4, SHARD_B_1, SHARD_B_2 }; String[] mf1Shards = new String[] { SHARD_A_1, SHARD_A_2, SHARD_A_3, SHARD_A_4 }; String[] mf2Shards = new String[] { SHARD_B_1, SHARD_B_2 }; assertEquals("This is a test", getOneResult(server, "a.txt", shards)); assertMissing(server, "a.txt", mf2Shards); assertEquals("<b>test</b>", getOneResult(server, "d.html", shards)); assertMissing(server, "d.html", mf2Shards); assertEquals("Test in part 3", getOneResult(server, "h.txt", shards)); assertMissing(server, "h.txt", mf2Shards); assertEquals("test data", getOneResult(server, "k.out", shards)); assertMissing(server, "k.out", mf2Shards); assertEquals("where is test", getOneResult(server, "w.txt", shards)); assertMissing(server, "w.txt", mf1Shards); assertEquals("xrays ionize", getOneResult(server, "x.txt", shards)); assertMissing(server, "x.txt", mf1Shards); assertMissing(server, "not-found", shards); server.shutdown(); } @Test public void testMultiThreadedAccess() throws Exception { final MapFileServer server = new MapFileServer(); server.init(NODE_NAME, nodeConfigurationFactory.getConfiguration()); server.addShard(SHARD_A_1, new File(MapFileTestResources.MAP_FILE_A, "a1")); server.addShard(SHARD_A_2, new File(MapFileTestResources.MAP_FILE_A, "a2")); server.addShard(SHARD_A_3, new File(MapFileTestResources.MAP_FILE_A, "a3")); server.addShard(SHARD_A_4, new File(MapFileTestResources.MAP_FILE_A, "a4")); server.addShard(SHARD_B_1, new File(MapFileTestResources.MAP_FILE_B, "b1")); server.addShard(SHARD_B_2, new File(MapFileTestResources.MAP_FILE_B, "b2")); final String[] shards = new String[] { SHARD_A_1, SHARD_A_2, SHARD_A_3, SHARD_A_4, SHARD_B_1, SHARD_B_2 }; final Map<String, String> entries = new HashMap<>(); entries.put("a.txt", "This is a test"); entries.put("b.xml", "<name>test</name>"); entries.put("d.html", "<b>test</b>"); entries.put("h.txt", "Test in part 3"); entries.put("i.xml", "<i>test</i>"); entries.put("k.out", "test data"); entries.put("w.txt", "where is test"); entries.put("x.txt", "xrays ionize"); entries.put("z.xml", "<zed>foo</zed>"); final List<String> keys = new ArrayList<>(entries.keySet()); Random rand = new Random("chok".hashCode()); List<Thread> threads = new ArrayList<>(); final List<Exception> exceptions = new ArrayList<>(); long startTime = System.currentTimeMillis(); final AtomicInteger count = new AtomicInteger(0); for (int i = 0; i < 20; i++) { final Random rand2 = new Random(rand.nextInt()); Thread t = new Thread(new Runnable() { public void run() { for (int j = 0; j < 500; j++) { int n = rand2.nextInt(entries.size()); String key = keys.get(n); try { assertEquals(entries.get(key), getOneResult(server, key, shards)); count.incrementAndGet(); } catch (Exception e) { System.err.println(e); exceptions.add(e); break; } } } }); threads.add(t); t.start(); } for (Thread t : threads) { t.join(); } long time = System.currentTimeMillis() - startTime; System.out.println((1000.0 * count.intValue() / time) + " requests / sec"); assertTrue(exceptions.isEmpty()); } protected String getOneResult(IMapFileServer server, String key, String[] shards) throws Exception { TextArrayWritable texts = server.get(new Text(key), shards); assertNotNull(texts); assertNotNull(texts.array); Writable[] array = texts.array.get(); assertEquals(1, array.length); assertTrue(array[0] instanceof Text); Text text = (Text) array[0]; return text.toString(); } private void assertMissing(IMapFileServer server, String key, String[] shards) throws Exception { TextArrayWritable texts = server.get(new Text(key), shards); assertNotNull(texts); assertNotNull(texts.array); Writable[] array = texts.array.get(); assertEquals(0, array.length); } }