| /** |
| * 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.apex.malhar.lib.io.fs; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.util.HashSet; |
| |
| import org.junit.Assert; |
| import org.junit.Rule; |
| import org.junit.Test; |
| |
| import org.apache.apex.malhar.lib.testbench.CollectorTestSink; |
| import org.apache.apex.malhar.lib.util.TestUtils; |
| import org.apache.apex.malhar.lib.util.TestUtils.TestInfo; |
| import org.apache.commons.io.FileUtils; |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.hadoop.fs.FileContext; |
| import org.apache.hadoop.fs.Path; |
| |
| import com.google.common.collect.Sets; |
| |
| import com.datatorrent.api.Attribute; |
| import com.datatorrent.api.DefaultOutputPort; |
| |
| import static org.apache.apex.malhar.lib.helper.OperatorContextTestHelper.mockOperatorContext; |
| |
| public class AbstractFileInputOperatorFailureHandlingTest |
| { |
| @Rule |
| public TestInfo testMeta = new TestInfo(); |
| |
| public static class TestFileInputOperator extends AbstractFileInputOperator<String> |
| { |
| public final transient DefaultOutputPort<String> output = new DefaultOutputPort<String>(); |
| private transient BufferedReader br = null; |
| int count = 0; |
| |
| @Override |
| protected InputStream openFile(Path path) throws IOException |
| { |
| InputStream is = super.openFile(path); |
| br = new BufferedReader(new InputStreamReader(is)); |
| count = 0; |
| return is; |
| } |
| |
| @Override |
| protected void closeFile(InputStream is) throws IOException |
| { |
| super.closeFile(is); |
| br.close(); |
| count = 0; |
| br = null; |
| } |
| |
| @Override |
| protected InputStream retryFailedFile(FailedFile ff) throws IOException |
| { |
| count = 0; |
| return super.retryFailedFile(ff); |
| } |
| |
| @Override |
| protected String readEntity() throws IOException |
| { |
| if (count != 0 && (count % 4) == 0) { |
| addToFailedList(); |
| return null; |
| } |
| return br.readLine(); |
| } |
| |
| @Override |
| protected void emit(String tuple) |
| { |
| output.emit(tuple); |
| count++; |
| } |
| } |
| |
| @Test |
| public void testFailureHandling() throws Exception |
| { |
| FileContext.getLocalFSFileContext().delete(new Path(new File(testMeta.getDir()).getAbsolutePath()), true); |
| HashSet<String> allLines = Sets.newHashSet(); |
| // Create files with 100 records. |
| for (int file = 0; file < 10; file++) { |
| HashSet<String> lines = Sets.newHashSet(); |
| for (int line = 0; line < 10; line++) { |
| lines.add("f" + file + "l" + line); |
| } |
| allLines.addAll(lines); |
| FileUtils.write(new File(testMeta.getDir(), "file" + file), StringUtils.join(lines, '\n')); |
| } |
| |
| Thread.sleep(10); |
| |
| TestFileInputOperator oper = new TestFileInputOperator(); |
| |
| CollectorTestSink<String> queryResults = new CollectorTestSink<String>(); |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| CollectorTestSink<Object> sink = (CollectorTestSink)queryResults; |
| oper.output.setSink(sink); |
| |
| oper.setDirectory(testMeta.getDir()); |
| oper.getScanner().setFilePatternRegexp(".*file[\\d]"); |
| |
| oper.setup(mockOperatorContext(1, new Attribute.AttributeMap.DefaultAttributeMap())); |
| for (long wid = 0; wid < 1000; wid++) { |
| oper.beginWindow(wid); |
| oper.emitTuples(); |
| oper.endWindow(); |
| } |
| oper.teardown(); |
| |
| Assert.assertEquals("number tuples", 100, queryResults.collectedTuples.size()); |
| Assert.assertEquals("lines", allLines, new HashSet<String>(queryResults.collectedTuples)); |
| TestUtils.deleteTargetTestClassFolder(testMeta.desc); |
| |
| } |
| } |