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.storm; import org.apache.commons.io.FileUtils; import org.apache.storm.generated.GlobalStreamId; import org.apache.storm.testing.TmpPath; import org.apache.storm.utils.LocalState; import org.apache.thrift.TBase; import org.junit.Assert; import org.junit.Test; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.util.HashMap; import java.util.Map; public class LocalStateTest { @Test public void testLocalState() throws Exception { try (TmpPath dir1_tmp = new TmpPath(); TmpPath dir2_tmp = new TmpPath()) { GlobalStreamId globalStreamId_a = new GlobalStreamId("a", "a"); GlobalStreamId globalStreamId_b = new GlobalStreamId("b", "b"); GlobalStreamId globalStreamId_c = new GlobalStreamId("c", "c"); GlobalStreamId globalStreamId_d = new GlobalStreamId("d", "d"); LocalState ls1 = new LocalState(dir1_tmp.getPath()); LocalState ls2 = new LocalState(dir2_tmp.getPath()); Assert.assertTrue(ls1.snapshot().isEmpty()); ls1.put("a", globalStreamId_a); ls1.put("b", globalStreamId_b); Map<String, GlobalStreamId> expected = new HashMap<>(); expected.put("a", globalStreamId_a); expected.put("b", globalStreamId_b); Assert.assertEquals(expected, ls1.snapshot()); Assert.assertEquals(expected, new LocalState(dir1_tmp.getPath()).snapshot()); Assert.assertTrue(ls2.snapshot().isEmpty()); ls2.put("b", globalStreamId_a); ls2.put("b", globalStreamId_b); ls2.put("b", globalStreamId_c); ls2.put("b", globalStreamId_d); Assert.assertEquals(globalStreamId_d, ls2.get("b")); } } @Test public void testEmptyState() throws IOException { TmpPath tmp_dir = new TmpPath(); String dir = tmp_dir.getPath(); LocalState ls = new LocalState(dir); GlobalStreamId gs_a = new GlobalStreamId("a", "a"); FileOutputStream data = FileUtils.openOutputStream(new File(dir, "12345")); FileOutputStream version = FileUtils.openOutputStream(new File(dir, "12345.version")); Assert.assertNull(ls.get("c")); ls.put("a", gs_a); Assert.assertEquals(gs_a, ls.get("a")); } }