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.falcon.regression; import org.apache.commons.io.FileUtils; import org.apache.falcon.entity.v0.EntityType; import org.apache.falcon.regression.core.bundle.Bundle; import org.apache.falcon.entity.v0.Frequency.TimeUnit; import org.apache.falcon.regression.core.enumsAndConstants.MerlinConstants; import org.apache.falcon.regression.core.helpers.ColoHelper; import org.apache.falcon.regression.core.util.*; import org.apache.falcon.regression.testHelper.BaseTestClass; import org.apache.hadoop.fs.FileSystem; import org.apache.log4j.Logger; import org.apache.oozie.client.Job.Status; import org.apache.oozie.client.OozieClient; import org.testng.Assert; import org.testng.annotations.*; import java.io.*; import java.net.HttpURLConnection; import java.net.URL; import java.util.List; import java.util.Map; /** * Tests with process lib folder with workflow.xml. */ @Test(groups = "embedded") public class ProcessLibPathLoadTest extends BaseTestClass { private ColoHelper cluster = servers.get(0); private OozieClient clusterOC = serverOC.get(0); private FileSystem clusterFS = serverFS.get(0); private String testDir = cleanAndGetTestDir(); private String aggregateWorkflowDir = testDir + "/aggregator"; private static final Logger LOGGER = Logger.getLogger(ProcessLibPathLoadTest.class); private String oozieLib = MerlinConstants.OOZIE_EXAMPLE_LIB; private String oozieLibName = oozieLib.substring(oozieLib.lastIndexOf('/') + 1); private String filename = OSUtil.concat(OSUtil.OOZIE_LIB_FOLDER, "lib", oozieLibName); private String processName; private String process; @BeforeClass(alwaysRun = true) public void createTestData() throws Exception { LOGGER.info("in @BeforeClass"); FileUtils.forceMkdir(new File(OSUtil.concat(OSUtil.OOZIE_LIB_FOLDER, "lib"))); saveUrlToFile(oozieLib); } @BeforeMethod(alwaysRun = true) public void setup() throws Exception { uploadDirToClusters(aggregateWorkflowDir, OSUtil.OOZIE_LIB_FOLDER); bundles[0] = BundleUtil.readELBundle(); bundles[0] = new Bundle(bundles[0], cluster); bundles[0].generateUniqueBundle(this); bundles[0].setInputFeedDataPath(testDir + MINUTE_DATE_PATTERN); bundles[0].setProcessValidity("2015-01-02T01:00Z", "2015-01-02T01:04Z"); bundles[0].setProcessPeriodicity(5, TimeUnit.minutes); bundles[0].setOutputFeedPeriodicity(5, TimeUnit.minutes); bundles[0].setOutputFeedLocationData(testDir + "/output-data" + MINUTE_DATE_PATTERN); bundles[0].setProcessConcurrency(1); bundles[0].setProcessLibPath(aggregateWorkflowDir + "/lib"); process = bundles[0].getProcessData(); processName = Util.readEntityName(process); } @AfterMethod(alwaysRun = true) public void tearDown() { removeTestClassEntities(); } @AfterClass(alwaysRun = true) public void deleteJar() throws IOException { File file = new File(filename); Assert.assertEquals(file.delete(), true, filename + " is not present."); FileUtils.deleteDirectory(new File(OSUtil.concat(OSUtil.OOZIE_LIB_FOLDER, "lib"))); } /** * Test which test a process with jar in lib location. * Schedule a process, it should succeed. * * @throws Exception */ @Test public void setRightJarInWorkflowLib() throws Exception { bundles[0].setProcessWorkflow(aggregateWorkflowDir); bundles[0].submitFeedsScheduleProcess(prism); InstanceUtil.waitTillInstancesAreCreated(clusterOC, process, 0); OozieUtil.createMissingDependencies(cluster, EntityType.PROCESS, processName, 0); OozieUtil.waitForBundleToReachState(clusterOC, processName, Status.SUCCEEDED); } /** * Test which test a process with no jar in lib location. * Schedule a process, it should get killed. * * @throws Exception */ @Test public void setNoJarInWorkflowLibLocation() throws Exception { HadoopUtil.deleteDirIfExists(aggregateWorkflowDir + "/lib/" + oozieLibName, clusterFS); bundles[0].setProcessWorkflow(aggregateWorkflowDir); bundles[0].submitFeedsScheduleProcess(prism); InstanceUtil.waitTillInstancesAreCreated(clusterOC, process, 0); OozieUtil.createMissingDependencies(cluster, EntityType.PROCESS, processName, 0); OozieUtil.waitForBundleToReachState(clusterOC, processName, Status.KILLED); } /** * Function to download jar at remote public location. * @param urlString public location from where jar is to be downloaded * filename is the location where the jar is to be saved * @throws Exception */ private void saveUrlToFile(String urlString) throws IOException { URL url = new URL(urlString); String link; HttpURLConnection http = (HttpURLConnection) url.openConnection(); Map<String, List<String>> header = http.getHeaderFields(); while (isRedirected(header)) { link = header.get("Location").get(0); url = new URL(link); http = (HttpURLConnection) url.openConnection(); header = http.getHeaderFields(); } InputStream input = http.getInputStream(); byte[] buffer = new byte[4096]; int n; OutputStream output = new FileOutputStream(new File(filename)); while ((n = input.read(buffer)) != -1) { output.write(buffer, 0, n); } output.close(); } private static boolean isRedirected(Map<String, List<String>> header) { for (String hv : header.get(null)) { if (hv.contains(" 301 ") || hv.contains(" 302 ")) { return true; } } return false; } }