jackylk commented on a change in pull request #3421: [CARBONDATA-3557] Support write Flink streaming data to Carbon
URL:
https://github.com/apache/carbondata/pull/3421#discussion_r339383763
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File path: integration/flink-proxy/src/main/java/org/apache/carbon/flink/ProxyFileWriterFactory.java
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@@ -0,0 +1,147 @@
+/*
+ * 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.carbon.flink;
+
+import org.apache.flink.api.common.serialization.BulkWriter;
+
+import java.io.IOException;
+import java.io.Serializable;
+import java.util.Map;
+import java.util.Properties;
+import java.util.concurrent.ConcurrentHashMap;
+
+public abstract class ProxyFileWriterFactory<OUT> implements BulkWriter.Factory<OUT> {
+
+ private static final long serialVersionUID = -1449889091046572219L;
+
+ private static final Map<String, Class<? extends ProxyFileWriterFactory>> FACTORY_MAP = new ConcurrentHashMap<>();
+
+ public static ProxyFileWriterFactory newInstance(final String factoryType) {
+ if (factoryType == null) {
+ throw new IllegalArgumentException("Argument [factoryType] is null.");
+ }
+ final Class<? extends ProxyFileWriterFactory> factoryClass = FACTORY_MAP.get(factoryType);
+ if (factoryClass == null) {
+ return null;
+ }
+ try {
+ return factoryClass.newInstance();
+ } catch (InstantiationException | IllegalAccessException exception) {
+ throw new RuntimeException(exception);
+ }
+ }
+
+ public static void register(final String factoryType, final Class<? extends ProxyFileWriterFactory> factoryClass) {
+ if (factoryType == null) {
+ throw new IllegalArgumentException("Argument [factoryType] is null.");
Review comment:
you can use Objects.requireNonNull for cleaner code
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