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HADOOP-18029: Update CompressionCodecFactory to handle uppercase file extensions (#3739) 

Co-authored-by: Desmond Sisson <sissonde@amazon.com>
This commit is contained in:
Desmond Sisson 2021-12-01 15:36:54 -08:00 committed by GitHub
parent 4dea4a7b67
commit df4197592f
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2 changed files with 110 additions and 79 deletions
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136
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/compress/CompressionCodecFactory.java
View File

@ -40,7 +40,7 @@ public class CompressionCodecFactory {
LoggerFactory.getLogger(CompressionCodecFactory.class.getName());
private static final ServiceLoader<CompressionCodec> CODEC_PROVIDERS =
ServiceLoader.load(CompressionCodec.class);
ServiceLoader.load(CompressionCodec.class);
/**
* A map from the reversed filename suffixes to the codecs.
@ -49,15 +49,15 @@ public class CompressionCodecFactory {
*/
private SortedMap<String, CompressionCodec> codecs = null;
/**
* A map from the reversed filename suffixes to the codecs.
* This is probably overkill, because the maps should be small, but it
* automatically supports finding the longest matching suffix.
*/
private Map<String, CompressionCodec> codecsByName = null;
/**
* A map from the reversed filename suffixes to the codecs.
* This is probably overkill, because the maps should be small, but it
* automatically supports finding the longest matching suffix.
*/
private Map<String, CompressionCodec> codecsByName = null;
/**
* A map from class names to the codecs
* A map from class names to the codecs.
*/
private HashMap<String, CompressionCodec> codecsByClassName = null;
@ -81,7 +81,7 @@ public class CompressionCodecFactory {
public String toString() {
StringBuilder buf = new StringBuilder();
Iterator<Map.Entry<String, CompressionCodec>> itr =
codecs.entrySet().iterator();
codecs.entrySet().iterator();
buf.append("{ ");
if (itr.hasNext()) {
Map.Entry<String, CompressionCodec> entry = itr.next();
@ -110,8 +110,8 @@ public class CompressionCodecFactory {
*/
public static List<Class<? extends CompressionCodec>> getCodecClasses(
Configuration conf) {
List<Class<? extends CompressionCodec>> result
= new ArrayList<Class<? extends CompressionCodec>>();
List<Class<? extends CompressionCodec>> result =
new ArrayList<Class<? extends CompressionCodec>>();
// Add codec classes discovered via service loading
synchronized (CODEC_PROVIDERS) {
// CODEC_PROVIDERS is a lazy collection. Synchronize so it is
@ -200,11 +200,13 @@ public class CompressionCodecFactory {
String filename = file.getName();
String reversedFilename =
new StringBuilder(filename).reverse().toString();
String lowerReversedFilename =
StringUtils.toLowerCase(reversedFilename);
SortedMap<String, CompressionCodec> subMap =
codecs.headMap(reversedFilename);
codecs.headMap(lowerReversedFilename);
if (!subMap.isEmpty()) {
String potentialSuffix = subMap.lastKey();
if (reversedFilename.startsWith(potentialSuffix)) {
if (lowerReversedFilename.startsWith(potentialSuffix)) {
result = codecs.get(potentialSuffix);
}
}
@ -224,57 +226,57 @@ public class CompressionCodecFactory {
return codecsByClassName.get(classname);
}
/**
* Find the relevant compression codec for the codec's canonical class name
* or by codec alias.
* <p>
* Codec aliases are case insensitive.
* <p>
* The code alias is the short class name (without the package name).
* If the short class name ends with 'Codec', then there are two aliases for
* the codec, the complete short class name and the short class name without
* the 'Codec' ending. For example for the 'GzipCodec' codec class name the
* alias are 'gzip' and 'gzipcodec'.
*
* @param codecName the canonical class name of the codec
* @return the codec object
*/
public CompressionCodec getCodecByName(String codecName) {
if (codecsByClassName == null) {
return null;
}
CompressionCodec codec = getCodecByClassName(codecName);
if (codec == null) {
// trying to get the codec by name in case the name was specified
// instead a class
codec = codecsByName.get(StringUtils.toLowerCase(codecName));
}
return codec;
/**
* Find the relevant compression codec for the codec's canonical class name
* or by codec alias.
* <p>
* Codec aliases are case insensitive.
* <p>
* The code alias is the short class name (without the package name).
* If the short class name ends with 'Codec', then there are two aliases for
* the codec, the complete short class name and the short class name without
* the 'Codec' ending. For example for the 'GzipCodec' codec class name the
* alias are 'gzip' and 'gzipcodec'.
*
* @param codecName the canonical class name of the codec
* @return the codec object
*/
public CompressionCodec getCodecByName(String codecName) {
if (codecsByClassName == null) {
return null;
}
CompressionCodec codec = getCodecByClassName(codecName);
if (codec == null) {
// trying to get the codec by name in case the name was specified
// instead a class
codec = codecsByName.get(StringUtils.toLowerCase(codecName));
}
return codec;
}
/**
* Find the relevant compression codec for the codec's canonical class name
* or by codec alias and returns its implemetation class.
* <p>
* Codec aliases are case insensitive.
* <p>
* The code alias is the short class name (without the package name).
* If the short class name ends with 'Codec', then there are two aliases for
* the codec, the complete short class name and the short class name without
* the 'Codec' ending. For example for the 'GzipCodec' codec class name the
* alias are 'gzip' and 'gzipcodec'.
*
* @param codecName the canonical class name of the codec
* @return the codec class
*/
public Class<? extends CompressionCodec> getCodecClassByName(
String codecName) {
CompressionCodec codec = getCodecByName(codecName);
if (codec == null) {
return null;
}
return codec.getClass();
/**
* Find the relevant compression codec for the codec's canonical class name
* or by codec alias and returns its implemetation class.
* <p>
* Codec aliases are case insensitive.
* <p>
* The code alias is the short class name (without the package name).
* If the short class name ends with 'Codec', then there are two aliases for
* the codec, the complete short class name and the short class name without
* the 'Codec' ending. For example for the 'GzipCodec' codec class name the
* alias are 'gzip' and 'gzipcodec'.
*
* @param codecName the canonical class name of the codec
* @return the codec class
*/
public Class<? extends CompressionCodec> getCodecClassByName(
String codecName) {
CompressionCodec codec = getCodecByName(codecName);
if (codec == null) {
return null;
}
return codec.getClass();
}
/**
* Removes a suffix from a filename, if it has it.
@ -323,8 +325,12 @@ public class CompressionCodecFactory {
len = in.read(buffer);
}
} finally {
if(out != null) { out.close(); }
if(in != null) { in.close(); }
if(out != null) {
out.close();
}
if(in != null) {
in.close();
}
}
} else {
CompressionInputStream in = null;
@ -338,7 +344,9 @@ public class CompressionCodecFactory {
len = in.read(buffer);
}
} finally {
if(in != null) { in.close(); }
if(in != null) {
in.close();
}
}
}
}

41
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/TestCodecFactory.java
View File

@ -29,6 +29,7 @@ import org.apache.hadoop.conf.Configuration;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.fail;
public class TestCodecFactory {
@ -46,7 +47,7 @@ public class TestCodecFactory {
@Override
public CompressionOutputStream createOutputStream(OutputStream out)
throws IOException {
throws IOException {
return null;
}
@ -63,20 +64,20 @@ public class TestCodecFactory {
@Override
public CompressionInputStream createInputStream(InputStream in,
Decompressor decompressor)
throws IOException {
throws IOException {
return null;
}
@Override
public CompressionInputStream createInputStream(InputStream in)
throws IOException {
throws IOException {
return null;
}
@Override
public CompressionOutputStream createOutputStream(OutputStream out,
Compressor compressor)
throws IOException {
throws IOException {
return null;
}
@ -125,7 +126,7 @@ public class TestCodecFactory {
}
/**
* Returns a factory for a given set of codecs
* Returns a factory for a given set of codecs.
* @param classes the codec classes to include
* @return a new factory
*/
@ -137,15 +138,21 @@ public class TestCodecFactory {
private static void checkCodec(String msg,
Class expected, CompressionCodec actual) {
assertEquals(msg + " unexpected codec found",
expected.getName(),
actual.getClass().getName());
if (expected == null) {
assertNull(msg, actual);
} else if (actual == null) {
fail(msg + " result was null");
} else {
assertEquals(msg + " unexpected codec found",
expected.getName(),
actual.getClass().getName());
}
}
@Test
public void testFinding() {
CompressionCodecFactory factory =
new CompressionCodecFactory(new Configuration());
new CompressionCodecFactory(new Configuration());
CompressionCodec codec = factory.getCodec(new Path("/tmp/foo.bar"));
assertEquals("default factory foo codec", null, codec);
codec = factory.getCodecByClassName(BarCodec.class.getCanonicalName());
@ -153,6 +160,8 @@ public class TestCodecFactory {
codec = factory.getCodec(new Path("/tmp/foo.gz"));
checkCodec("default factory for .gz", GzipCodec.class, codec);
codec = factory.getCodec(new Path("/tmp/foo.GZ"));
checkCodec("default factory for .GZ", GzipCodec.class, codec);
codec = factory.getCodecByClassName(GzipCodec.class.getCanonicalName());
checkCodec("default factory for gzip codec", GzipCodec.class, codec);
codec = factory.getCodecByName("gzip");
@ -168,6 +177,8 @@ public class TestCodecFactory {
codec = factory.getCodec(new Path("/tmp/foo.bz2"));
checkCodec("default factory for .bz2", BZip2Codec.class, codec);
codec = factory.getCodec(new Path("/tmp/foo.BZ2"));
checkCodec("default factory for .BZ2", BZip2Codec.class, codec);
codec = factory.getCodecByClassName(BZip2Codec.class.getCanonicalName());
checkCodec("default factory for bzip2 codec", BZip2Codec.class, codec);
codec = factory.getCodecByName("bzip2");
@ -221,16 +232,22 @@ public class TestCodecFactory {
FooBarCodec.class});
codec = factory.getCodec(new Path("/tmp/.foo.bar.gz"));
checkCodec("full factory gz codec", GzipCodec.class, codec);
codec = factory.getCodec(new Path("/tmp/.foo.bar.GZ"));
checkCodec("full factory GZ codec", GzipCodec.class, codec);
codec = factory.getCodecByClassName(GzipCodec.class.getCanonicalName());
checkCodec("full codec gz codec", GzipCodec.class, codec);
codec = factory.getCodec(new Path("/tmp/foo.bz2"));
checkCodec("full factory for .bz2", BZip2Codec.class, codec);
codec = factory.getCodec(new Path("/tmp/foo.BZ2"));
checkCodec("full factory for .BZ2", BZip2Codec.class, codec);
codec = factory.getCodecByClassName(BZip2Codec.class.getCanonicalName());
checkCodec("full codec bzip2 codec", BZip2Codec.class, codec);
codec = factory.getCodec(new Path("/tmp/foo.bar"));
checkCodec("full factory bar codec", BarCodec.class, codec);
codec = factory.getCodec(new Path("/tmp/foo.BAR"));
checkCodec("full factory BAR codec", BarCodec.class, codec);
codec = factory.getCodecByClassName(BarCodec.class.getCanonicalName());
checkCodec("full factory bar codec", BarCodec.class, codec);
codec = factory.getCodecByName("bar");
@ -240,6 +257,8 @@ public class TestCodecFactory {
codec = factory.getCodec(new Path("/tmp/foo/baz.foo.bar"));
checkCodec("full factory foo bar codec", FooBarCodec.class, codec);
codec = factory.getCodec(new Path("/tmp/foo/baz.FOO.bar"));
checkCodec("full factory FOO bar codec", FooBarCodec.class, codec);
codec = factory.getCodecByClassName(FooBarCodec.class.getCanonicalName());
checkCodec("full factory foo bar codec", FooBarCodec.class, codec);
codec = factory.getCodecByName("foobar");
@ -249,6 +268,8 @@ public class TestCodecFactory {
codec = factory.getCodec(new Path("/tmp/foo.foo"));
checkCodec("full factory foo codec", FooCodec.class, codec);
codec = factory.getCodec(new Path("/tmp/FOO.FOO"));
checkCodec("full factory FOO codec", FooCodec.class, codec);
codec = factory.getCodecByClassName(FooCodec.class.getCanonicalName());
checkCodec("full factory foo codec", FooCodec.class, codec);
codec = factory.getCodecByName("foo");
@ -259,6 +280,8 @@ public class TestCodecFactory {
factory = setClasses(new Class[]{NewGzipCodec.class});
codec = factory.getCodec(new Path("/tmp/foo.gz"));
checkCodec("overridden factory for .gz", NewGzipCodec.class, codec);
codec = factory.getCodec(new Path("/tmp/foo.GZ"));
checkCodec("overridden factory for .GZ", NewGzipCodec.class, codec);
codec = factory.getCodecByClassName(NewGzipCodec.class.getCanonicalName());
checkCodec("overridden factory for gzip codec", NewGzipCodec.class, codec);