content: /*
   * 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.flink.connectors.kudu.format;
  
  import org.apache.flink.annotation.PublicEvolving;
  import org.apache.flink.api.common.io.RichOutputFormat;
  import org.apache.flink.configuration.Configuration;
  import org.apache.flink.connectors.kudu.connector.KuduTableInfo;
  import org.apache.flink.connectors.kudu.connector.failure.DefaultKuduFailureHandler;
  import org.apache.flink.connectors.kudu.connector.failure.KuduFailureHandler;
  import org.apache.flink.connectors.kudu.connector.writer.KuduOperationMapper;
  import org.apache.flink.connectors.kudu.connector.writer.KuduWriter;
  import org.apache.flink.connectors.kudu.connector.writer.KuduWriterConfig;
  import org.apache.flink.runtime.state.FunctionInitializationContext;
  import org.apache.flink.runtime.state.FunctionSnapshotContext;
  import org.apache.flink.streaming.api.checkpoint.CheckpointedFunction;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.IOException;
  
  import static org.apache.flink.util.Preconditions.checkNotNull;
  
  /**
   * Output format for writing data into a Kudu table (defined by the provided {@link KuduTableInfo}) in both batch
   * and stream programs.
   */
  @PublicEvolving
  public class KuduOutputFormat<IN> extends RichOutputFormat<IN> implements CheckpointedFunction {
  
      private final Logger log = LoggerFactory.getLogger(getClass());
  
      private final KuduTableInfo tableInfo;
      private final KuduWriterConfig writerConfig;
      private final KuduFailureHandler failureHandler;
      private final KuduOperationMapper<IN> opsMapper;
  
      private transient KuduWriter kuduWriter;
  
      public KuduOutputFormat(KuduWriterConfig writerConfig, KuduTableInfo tableInfo, KuduOperationMapper<IN> opsMapper) {
          this(writerConfig, tableInfo, opsMapper, new DefaultKuduFailureHandler());
      }
  
      public KuduOutputFormat(KuduWriterConfig writerConfig, KuduTableInfo tableInfo, KuduOperationMapper<IN> opsMapper, KuduFailureHandler failureHandler) {
          this.tableInfo = checkNotNull(tableInfo, "tableInfo could not be null");
          this.writerConfig = checkNotNull(writerConfig, "config could not be null");
          this.opsMapper = checkNotNull(opsMapper, "opsMapper could not be null");
          this.failureHandler = checkNotNull(failureHandler, "failureHandler could not be null");
      }
  
      @Override
      public void configure(Configuration parameters) {
      }
  
      @Override
      public void open(int taskNumber, int numTasks) throws IOException {
          kuduWriter = new KuduWriter(tableInfo, writerConfig, opsMapper, failureHandler);
      }
  
      @Override
      public void writeRecord(IN row) throws IOException {
          kuduWriter.write(row);
      }
  
      @Override
      public void close() throws IOException {
          if (kuduWriter != null) {
              kuduWriter.close();
          }
      }
  
      @Override
      public void snapshotState(FunctionSnapshotContext functionSnapshotContext) throws Exception {
          kuduWriter.flushAndCheckErrors();
      }
  
      @Override
      public void initializeState(FunctionInitializationContext functionInitializationContext) throws Exception {
  
      }
  }
  