HADOOP-14261. Some refactoring work for erasure coding raw coder. Contributed by Lin Zeng.

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/erasurecode/CodecUtil.java

@@ -33,7 +33,7 @@ import org.apache.hadoop.io.erasurecode.coder.ErasureEncoder;
 import org.apache.hadoop.io.erasurecode.rawcoder.NativeRSRawErasureCoderFactory;
 import org.apache.hadoop.io.erasurecode.rawcoder.NativeXORRawErasureCoderFactory;
 import org.apache.hadoop.io.erasurecode.rawcoder.RSRawErasureCoderFactory;
-import org.apache.hadoop.io.erasurecode.rawcoder.RSRawErasureCoderFactoryLegacy;
+import org.apache.hadoop.io.erasurecode.rawcoder.RSLegacyRawErasureCoderFactory;
 import org.apache.hadoop.io.erasurecode.rawcoder.RawErasureCoderFactory;
 import org.apache.hadoop.io.erasurecode.rawcoder.RawErasureDecoder;
 import org.apache.hadoop.io.erasurecode.rawcoder.RawErasureEncoder;
@@ -80,7 +80,7 @@ public final class CodecUtil {
   public static final String IO_ERASURECODE_CODEC_RS_LEGACY_RAWCODERS_KEY =
       IO_ERASURECODE_CODEC + "rs-legacy.rawcoders";
   public static final String IO_ERASURECODE_CODEC_RS_LEGACY_RAWCODERS_DEFAULT =
-      RSRawErasureCoderFactoryLegacy.class.getCanonicalName();
+      RSLegacyRawErasureCoderFactory.class.getCanonicalName();
   public static final String IO_ERASURECODE_CODEC_RS_RAWCODERS_KEY =
       IO_ERASURECODE_CODEC + "rs.rawcoders";
   public static final String IO_ERASURECODE_CODEC_RS_RAWCODERS_DEFAULT =

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/erasurecode/rawcoder/RSRawDecoderLegacy.java → hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/erasurecode/rawcoder/RSLegacyRawDecoder.java

@@ -34,12 +34,12 @@ import java.nio.ByteBuffer;
  * addressed in HADOOP-11871.
  */
 @InterfaceAudience.Private
-public class RSRawDecoderLegacy extends RawErasureDecoder {
+public class RSLegacyRawDecoder extends RawErasureDecoder {
   // To describe and calculate the needed Vandermonde matrix
   private int[] errSignature;
   private int[] primitivePower;
 
-  public RSRawDecoderLegacy(ErasureCoderOptions coderOptions) {
+  public RSLegacyRawDecoder(ErasureCoderOptions coderOptions) {
     super(coderOptions);
     if (getNumAllUnits() >= RSUtil.GF.getFieldSize()) {
       throw new HadoopIllegalArgumentException(

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/erasurecode/rawcoder/RSRawEncoderLegacy.java → hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/erasurecode/rawcoder/RSLegacyRawEncoder.java

@@ -30,10 +30,10 @@ import java.util.Arrays;
  * when possible.
  */
 @InterfaceAudience.Private
-public class RSRawEncoderLegacy extends RawErasureEncoder {
+public class RSLegacyRawEncoder extends RawErasureEncoder {
   private int[] generatingPolynomial;
 
-  public RSRawEncoderLegacy(ErasureCoderOptions coderOptions) {
+  public RSLegacyRawEncoder(ErasureCoderOptions coderOptions) {
     super(coderOptions);
 
     assert (getNumDataUnits() + getNumParityUnits() < RSUtil.GF.getFieldSize());

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/erasurecode/rawcoder/RSRawErasureCoderFactoryLegacy.java → hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/erasurecode/rawcoder/RSLegacyRawErasureCoderFactory.java

@@ -24,15 +24,15 @@ import org.apache.hadoop.io.erasurecode.ErasureCoderOptions;
  * A raw coder factory for the legacy raw Reed-Solomon coder in Java.
  */
 @InterfaceAudience.Private
-public class RSRawErasureCoderFactoryLegacy implements RawErasureCoderFactory {
+public class RSLegacyRawErasureCoderFactory implements RawErasureCoderFactory {
 
   @Override
   public RawErasureEncoder createEncoder(ErasureCoderOptions coderOptions) {
-    return new RSRawEncoderLegacy(coderOptions);
+    return new RSLegacyRawEncoder(coderOptions);
   }
 
   @Override
   public RawErasureDecoder createDecoder(ErasureCoderOptions coderOptions) {
-    return new RSRawDecoderLegacy(coderOptions);
+    return new RSLegacyRawDecoder(coderOptions);
   }
 }

hadoop-common-project/hadoop-common/src/main/resources/core-default.xml

@@ -677,7 +677,7 @@
 
 <property>
   <name>io.erasurecode.codec.rs-legacy.rawcoders</name>
-  <value>org.apache.hadoop.io.erasurecode.rawcoder.RSRawErasureCoderFactoryLegacy</value>
+  <value>org.apache.hadoop.io.erasurecode.rawcoder.RSLegacyRawErasureCoderFactory</value>
   <description>
     Comma separated raw coder implementations for the rs-legacy codec. The earlier
     factory is prior to followings in case of failure of creating raw coders.

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/TestCodecRawCoderMapping.java

@@ -20,9 +20,9 @@ package org.apache.hadoop.io.erasurecode;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.io.erasurecode.rawcoder.NativeRSRawErasureCoderFactory;
 import org.apache.hadoop.io.erasurecode.rawcoder.RSRawDecoder;
-import org.apache.hadoop.io.erasurecode.rawcoder.RSRawDecoderLegacy;
+import org.apache.hadoop.io.erasurecode.rawcoder.RSLegacyRawDecoder;
 import org.apache.hadoop.io.erasurecode.rawcoder.RSRawEncoder;
-import org.apache.hadoop.io.erasurecode.rawcoder.RSRawEncoderLegacy;
+import org.apache.hadoop.io.erasurecode.rawcoder.RSLegacyRawEncoder;
 import org.apache.hadoop.io.erasurecode.rawcoder.RSRawErasureCoderFactory;
 import org.apache.hadoop.io.erasurecode.rawcoder.RawErasureDecoder;
 import org.apache.hadoop.io.erasurecode.rawcoder.RawErasureEncoder;
@@ -62,10 +62,10 @@ public class TestCodecRawCoderMapping {
     // should return default raw coder of rs-legacy codec
     encoder = CodecUtil.createRawEncoder(conf,
         ErasureCodeConstants.RS_LEGACY_CODEC_NAME, coderOptions);
-    Assert.assertTrue(encoder instanceof RSRawEncoderLegacy);
+    Assert.assertTrue(encoder instanceof RSLegacyRawEncoder);
     decoder = CodecUtil.createRawDecoder(conf,
         ErasureCodeConstants.RS_LEGACY_CODEC_NAME, coderOptions);
-    Assert.assertTrue(decoder instanceof RSRawDecoderLegacy);
+    Assert.assertTrue(decoder instanceof RSLegacyRawDecoder);
   }
 
   @Test
@@ -122,10 +122,10 @@ public class TestCodecRawCoderMapping {
     // should return default raw coder of rs-legacy codec
     RawErasureEncoder encoder = CodecUtil.createRawEncoder(
             conf, ErasureCodeConstants.RS_LEGACY_CODEC_NAME, coderOptions);
-    Assert.assertTrue(encoder instanceof RSRawEncoderLegacy);
+    Assert.assertTrue(encoder instanceof RSLegacyRawEncoder);
     RawErasureDecoder decoder = CodecUtil.createRawDecoder(
             conf, ErasureCodeConstants.RS_LEGACY_CODEC_NAME, coderOptions);
-    Assert.assertTrue(decoder instanceof RSRawDecoderLegacy);
+    Assert.assertTrue(decoder instanceof RSLegacyRawDecoder);
   }
 
   @Test

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/rawcoder/RawErasureCoderBenchmark.java

@@ -60,7 +60,7 @@ public final class RawErasureCoderBenchmark {
   private static final List<RawErasureCoderFactory> CODER_MAKERS =
       Collections.unmodifiableList(
           Arrays.asList(new DummyRawErasureCoderFactory(),
-              new RSRawErasureCoderFactoryLegacy(),
+              new RSLegacyRawErasureCoderFactory(),
               new RSRawErasureCoderFactory(),
               new NativeRSRawErasureCoderFactory()));
 

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/rawcoder/TestDummyRawCoder.java

@@ -29,8 +29,8 @@ import java.nio.ByteBuffer;
 public class TestDummyRawCoder extends TestRawCoderBase {
   @Before
   public void setup() {
-    encoderClass = DummyRawEncoder.class;
-    decoderClass = DummyRawDecoder.class;
+    encoderFactoryClass = DummyRawErasureCoderFactory.class;
+    decoderFactoryClass = DummyRawErasureCoderFactory.class;
     setAllowDump(false);
     setChunkSize(baseChunkSize);
   }

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/rawcoder/TestNativeRSRawCoder.java

@@ -30,8 +30,8 @@ public class TestNativeRSRawCoder extends TestRSRawCoderBase {
   @Before
   public void setup() {
     Assume.assumeTrue(ErasureCodeNative.isNativeCodeLoaded());
-    this.encoderClass = NativeRSRawEncoder.class;
-    this.decoderClass = NativeRSRawDecoder.class;
+    this.encoderFactoryClass = NativeRSRawErasureCoderFactory.class;
+    this.decoderFactoryClass = NativeRSRawErasureCoderFactory.class;
     setAllowDump(true);
   }
 

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/rawcoder/TestNativeXORRawCoder.java

@@ -29,8 +29,8 @@ public class TestNativeXORRawCoder extends TestXORRawCoderBase {
   @Before
   public void setup() {
     Assume.assumeTrue(ErasureCodeNative.isNativeCodeLoaded());
-    this.encoderClass = NativeXORRawEncoder.class;
-    this.decoderClass = NativeXORRawDecoder.class;
+    this.encoderFactoryClass = NativeXORRawErasureCoderFactory.class;
+    this.decoderFactoryClass = NativeXORRawErasureCoderFactory.class;
     setAllowDump(true);
   }
 }

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/rawcoder/TestRSRawCoderLegacy.java → hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/rawcoder/TestRSLegacyRawCoder.java

@@ -22,12 +22,12 @@ import org.junit.Before;
 /**
  * Test the legacy raw Reed-solomon coder implemented in Java.
  */
-public class TestRSRawCoderLegacy extends TestRSRawCoderBase {
+public class TestRSLegacyRawCoder extends TestRSRawCoderBase {
 
   @Before
   public void setup() {
-    this.encoderClass = RSRawEncoderLegacy.class;
-    this.decoderClass = RSRawDecoderLegacy.class;
+    this.encoderFactoryClass = RSLegacyRawErasureCoderFactory.class;
+    this.decoderFactoryClass = RSLegacyRawErasureCoderFactory.class;
     setAllowDump(false); // Change to true to allow verbose dump for debugging
   }
 }

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/rawcoder/TestRSRawCoder.java

@@ -26,8 +26,8 @@ public class TestRSRawCoder extends TestRSRawCoderBase {
 
   @Before
   public void setup() {
-    this.encoderClass = RSRawEncoder.class;
-    this.decoderClass = RSRawDecoder.class;
+    this.encoderFactoryClass = RSRawErasureCoderFactory.class;
+    this.decoderFactoryClass = RSRawErasureCoderFactory.class;
     setAllowDump(false);
   }
 }

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/rawcoder/TestRSRawCoderInteroperable1.java

@@ -30,8 +30,8 @@ public class TestRSRawCoderInteroperable1 extends TestRSRawCoderBase {
   public void setup() {
     Assume.assumeTrue(ErasureCodeNative.isNativeCodeLoaded());
 
-    this.encoderClass = RSRawEncoder.class;
-    this.decoderClass = NativeRSRawDecoder.class;
+    this.encoderFactoryClass = RSRawErasureCoderFactory.class;
+    this.decoderFactoryClass = NativeRSRawErasureCoderFactory.class;
     setAllowDump(true);
   }
 

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/rawcoder/TestRSRawCoderInteroperable2.java

@@ -30,8 +30,8 @@ public class TestRSRawCoderInteroperable2 extends TestRSRawCoderBase {
   public void setup() {
     Assume.assumeTrue(ErasureCodeNative.isNativeCodeLoaded());
 
-    this.encoderClass = NativeRSRawEncoder.class;
-    this.decoderClass = RSRawDecoder.class;
+    this.encoderFactoryClass = NativeRSRawErasureCoderFactory.class;
+    this.decoderFactoryClass = RSRawErasureCoderFactory.class;
     setAllowDump(true);
   }
 

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/rawcoder/TestRawCoderBase.java

@@ -23,14 +23,12 @@ import org.apache.hadoop.io.erasurecode.TestCoderBase;
 import org.junit.Assert;
 import org.junit.Test;
 
-import java.lang.reflect.Constructor;
-
 /**
  * Raw coder test base with utilities.
  */
 public abstract class TestRawCoderBase extends TestCoderBase {
-  protected Class<? extends RawErasureEncoder> encoderClass;
-  protected Class<? extends RawErasureDecoder> decoderClass;
+  protected Class<? extends RawErasureCoderFactory> encoderFactoryClass;
+  protected Class<? extends RawErasureCoderFactory> decoderFactoryClass;
   protected RawErasureEncoder encoder;
   protected RawErasureDecoder decoder;
 
@@ -234,9 +232,8 @@ public abstract class TestRawCoderBase extends TestCoderBase {
         new ErasureCoderOptions(numDataUnits, numParityUnits,
             allowChangeInputs, allowDump);
     try {
-      Constructor<? extends RawErasureEncoder> constructor =
-          encoderClass.getConstructor(ErasureCoderOptions.class);
-      return constructor.newInstance(coderConf);
+      RawErasureCoderFactory factory = encoderFactoryClass.newInstance();
+      return factory.createEncoder(coderConf);
     } catch (Exception e) {
       throw new RuntimeException("Failed to create encoder", e);
     }
@@ -251,9 +248,8 @@ public abstract class TestRawCoderBase extends TestCoderBase {
         new ErasureCoderOptions(numDataUnits, numParityUnits,
             allowChangeInputs, allowDump);
     try {
-      Constructor<? extends RawErasureDecoder> constructor =
-          decoderClass.getConstructor(ErasureCoderOptions.class);
-      return constructor.newInstance(coderConf);
+      RawErasureCoderFactory factory = encoderFactoryClass.newInstance();
+      return factory.createDecoder(coderConf);
     } catch (Exception e) {
       throw new RuntimeException("Failed to create decoder", e);
     }

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/rawcoder/TestXORRawCoder.java

@@ -26,7 +26,7 @@ public class TestXORRawCoder extends TestXORRawCoderBase {
 
   @Before
   public void setup() {
-    this.encoderClass = XORRawEncoder.class;
-    this.decoderClass = XORRawDecoder.class;
+    this.encoderFactoryClass = XORRawErasureCoderFactory.class;
+    this.decoderFactoryClass = XORRawErasureCoderFactory.class;
   }
 }

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/rawcoder/TestXORRawCoderInteroperable1.java

@@ -29,8 +29,8 @@ public class TestXORRawCoderInteroperable1 extends TestXORRawCoderBase {
   @Before
   public void setup() {
     Assume.assumeTrue(ErasureCodeNative.isNativeCodeLoaded());
-    this.encoderClass = XORRawEncoder.class;
-    this.decoderClass = NativeXORRawDecoder.class;
+    this.encoderFactoryClass = XORRawErasureCoderFactory.class;
+    this.decoderFactoryClass = NativeXORRawErasureCoderFactory.class;
     setAllowDump(true);
   }
 }

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/erasurecode/rawcoder/TestXORRawCoderInteroperable2.java

@@ -29,8 +29,8 @@ public class TestXORRawCoderInteroperable2 extends TestXORRawCoderBase {
   @Before
   public void setup() {
     Assume.assumeTrue(ErasureCodeNative.isNativeCodeLoaded());
-    this.encoderClass = NativeXORRawEncoder.class;
-    this.decoderClass = XORRawDecoder.class;
+    this.encoderFactoryClass = NativeXORRawErasureCoderFactory.class;
+    this.decoderFactoryClass = XORRawErasureCoderFactory.class;
     setAllowDump(true);
   }