| /** |
| * 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 |
| * |
| * https://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.avro.file; |
| |
| import static org.junit.Assert.fail; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| import org.apache.avro.Schema; |
| import org.apache.avro.generic.GenericDatumWriter; |
| import org.apache.avro.util.RandomData; |
| import org.junit.Test; |
| |
| /* |
| * Tests if we not write any garbage to the end of the file after any exception occurred |
| */ |
| public class TestIOExceptionDuringWrite { |
| |
| private static class FailingOutputStream extends OutputStream { |
| private int byteCnt; |
| |
| public FailingOutputStream(int failAfter) { |
| byteCnt = failAfter; |
| } |
| |
| @Override |
| public void write(int b) throws IOException { |
| if (byteCnt > 0) { |
| --byteCnt; |
| } else if (byteCnt == 0) { |
| --byteCnt; |
| throw new IOException("Artificial failure from FailingOutputStream"); |
| } else { |
| fail("No bytes should have been written after IOException"); |
| } |
| } |
| } |
| |
| private static final String SCHEMA_JSON = "{\"type\": \"record\", \"name\": \"Test\", \"fields\": [" |
| + "{\"name\":\"stringField\", \"type\":\"string\"}," + "{\"name\":\"longField\", \"type\":\"long\"}]}"; |
| private static final Schema SCHEMA = new Schema.Parser().parse(SCHEMA_JSON); |
| |
| @Test |
| public void testNoWritingAfterException() throws IOException { |
| try (DataFileWriter<Object> writer = new DataFileWriter<>(new GenericDatumWriter<>())) { |
| writer.create(SCHEMA, new FailingOutputStream(100000)); |
| int recordCnt = 0; |
| for (Object datum : new RandomData(SCHEMA, 100000, 42)) { |
| writer.append(datum); |
| if (++recordCnt % 17 == 0) { |
| writer.flush(); |
| } |
| } |
| } catch (IOException e) { |
| return; |
| } |
| fail("IOException should have been thrown"); |
| } |
| |
| } |