HADOOP-11707. Add factory to create raw erasure coder. Contributed by Kai Zheng

hadoop-common-project/hadoop-common/CHANGES-HDFS-EC-7285.txt

@@ -24,4 +24,5 @@
     HADOOP-11706. Refine a little bit erasure coder API. Contributed by Kai Zheng
     ( Kai Zheng )
 
-
+    HADOOP-11707. Add factory to create raw erasure coder. Contributed by Kai Zheng
+    ( Kai Zheng )

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

@@ -0,0 +1,34 @@
+/**
+ * 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.hadoop.io.erasurecode.rawcoder;
+
+/**
+ * A raw coder factory for raw Reed-Solomon coder in Java.
+ */
+public class JRSRawErasureCoderFactory implements RawErasureCoderFactory {
+
+  @Override
+  public RawErasureEncoder createEncoder() {
+    return new JRSRawEncoder();
+  }
+
+  @Override
+  public RawErasureDecoder createDecoder() {
+    return new JRSRawDecoder();
+  }
+}

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

@@ -0,0 +1,38 @@
+/**
+ * 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.hadoop.io.erasurecode.rawcoder;
+
+/**
+ * Raw erasure coder factory that can be used to create raw encoder and decoder.
+ * It helps in configuration since only one factory class is needed to be
+ * configured.
+ */
+public interface RawErasureCoderFactory {
+
+  /**
+   * Create raw erasure encoder.
+   * @return raw erasure encoder
+   */
+  public RawErasureEncoder createEncoder();
+
+  /**
+   * Create raw erasure decoder.
+   * @return raw erasure decoder
+   */
+  public RawErasureDecoder createDecoder();
+}

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

@@ -0,0 +1,34 @@
+/**
+ * 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.hadoop.io.erasurecode.rawcoder;
+
+/**
+ * A raw coder factory for raw XOR coder.
+ */
+public class XorRawErasureCoderFactory implements RawErasureCoderFactory {
+
+  @Override
+  public RawErasureEncoder createEncoder() {
+    return new XorRawEncoder();
+  }
+
+  @Override
+  public RawErasureDecoder createDecoder() {
+    return new XorRawDecoder();
+  }
+}