/**
* Licensed to Cloudera, Inc. under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Cloudera, Inc. 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 com.cloudera.flume.handlers.avro;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Arrays;
import org.apache.avro.file.DataFileReader;
import org.apache.avro.io.DatumReader;
import org.apache.avro.reflect.ReflectDatumReader;
import org.apache.commons.lang.StringEscapeUtils;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.cloudera.flume.conf.Context;
import com.cloudera.flume.conf.FlumeBuilder;
import com.cloudera.flume.conf.FlumeSpecException;
import com.cloudera.flume.core.Event;
import com.cloudera.flume.core.EventImpl;
import com.cloudera.flume.core.EventSink;
import com.cloudera.flume.core.EventUtil;
import com.cloudera.flume.handlers.debug.MemorySinkSource;
import com.cloudera.flume.handlers.text.FormatFactory;
import com.cloudera.flume.handlers.text.output.OutputFormat;
import com.cloudera.util.FileUtil;
/**
* This test takes a small canned batch of events, writes them to a avro data
* file, and then reads them back checking the values.
*/
public class TestAvroDataFile {
private static final Logger LOG = LoggerFactory
.getLogger(TestAvroDataFile.class);
@Test
public void testAvroDataFileWriteRead() throws IOException,
FlumeSpecException, InterruptedException {
MemorySinkSource mem = MemorySinkSource.cannedData("test ", 5);
// setup sink.
File f = FileUtil.createTempFile("avrodata", ".avro");
f.deleteOnExit();
LOG.info("filename before escaping: " + f.getAbsolutePath());
String custom = "text(\""
+ StringEscapeUtils.escapeJava(f.getAbsolutePath())
+ "\", \"avrodata\")";
LOG.info("sink to parse: " + custom);
EventSink snk = FlumeBuilder.buildSink(new Context(), custom);
snk.open();
mem.open();
EventUtil.dumpAll(mem, snk);
snk.close();
mem.open();
DatumReader<EventImpl> dtm = new ReflectDatumReader<EventImpl>(
EventImpl.class);
DataFileReader<EventImpl> dr = new DataFileReader<EventImpl>(f, dtm);
EventImpl eout = null;
for (Object o : dr) {
eout = (EventImpl) o; // TODO (jon) fix AVRO -- this is gross
Event expected = mem.next();
Assert.assertTrue(Arrays.equals(eout.getBody(), expected.getBody()));
}
}
/**
* This is a helper method that is a lot like the above, except that it
* directly creates the output format so that we can configure it, since
* this isn't possible via the configuration language currently.
*/
public void avroDataFileWriteReadHelper(String... args) throws IOException,
FlumeSpecException, InterruptedException {
MemorySinkSource mem = MemorySinkSource.cannedData("test ", 5);
// setup sink.
File f = FileUtil.createTempFile("avrodata", ".avro");
f.deleteOnExit();
FileOutputStream fos = new FileOutputStream(f);
LOG.info("filename before escaping: " + f.getAbsolutePath());
OutputFormat out = FormatFactory.get().getOutputFormat("avrodata", args);
mem.open();
Event e = mem.next();
while (e != null) {
out.format(fos, e);
e = mem.next();
}
mem.open();
DatumReader<EventImpl> dtm = new ReflectDatumReader<EventImpl>(
EventImpl.class);
DataFileReader<EventImpl> dr = new DataFileReader<EventImpl>(f, dtm);
EventImpl eout = null;
for (Object o : dr) {
eout = (EventImpl) o; // TODO (jon) fix AVRO -- this is gross
Event expected = mem.next();
Assert.assertTrue(Arrays.equals(eout.getBody(), expected.getBody()));
}
}
@Test
public void testAvroDataFileFormatDefault() throws IOException,
FlumeSpecException, InterruptedException {
avroDataFileWriteReadHelper();
}
@Test
public void testAvroDataFileFormatNullCodec() throws IOException,
FlumeSpecException, InterruptedException {
avroDataFileWriteReadHelper("null");
}
@Test
public void testAvroDataFileFormatDeflateCodec() throws IOException,
FlumeSpecException, InterruptedException {
avroDataFileWriteReadHelper("deflate");
}
@Test
public void testAvroDataFileFormatDeflateConfiguredCodec() throws IOException,
FlumeSpecException, InterruptedException {
avroDataFileWriteReadHelper("deflate", "9");
}
@Test(expected=IllegalArgumentException.class)
public void testAvroDataFileFormatInvalidCodec() throws IOException,
FlumeSpecException, InterruptedException {
avroDataFileWriteReadHelper("invalid");
}
}