| /* |
| * 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.connector.writer; |
| |
| import org.apache.flink.annotation.Internal; |
| import org.apache.flink.annotation.VisibleForTesting; |
| 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.kudu.client.DeleteTableResponse; |
| import org.apache.kudu.client.KuduClient; |
| import org.apache.kudu.client.KuduSession; |
| import org.apache.kudu.client.KuduTable; |
| import org.apache.kudu.client.Operation; |
| import org.apache.kudu.client.OperationResponse; |
| import org.apache.kudu.client.RowError; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| @Internal |
| public class KuduWriter<T> implements AutoCloseable { |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private final KuduTableInfo tableInfo; |
| private final KuduWriterConfig writerConfig; |
| private final KuduFailureHandler failureHandler; |
| private final KuduOperationMapper<T> operationMapper; |
| |
| private transient KuduClient client; |
| private transient KuduSession session; |
| private transient KuduTable table; |
| |
| public KuduWriter(KuduTableInfo tableInfo, KuduWriterConfig writerConfig, KuduOperationMapper<T> operationMapper) throws IOException { |
| this(tableInfo, writerConfig, operationMapper, new DefaultKuduFailureHandler()); |
| } |
| |
| public KuduWriter(KuduTableInfo tableInfo, KuduWriterConfig writerConfig, KuduOperationMapper<T> operationMapper, KuduFailureHandler failureHandler) throws IOException { |
| this.tableInfo = tableInfo; |
| this.writerConfig = writerConfig; |
| this.failureHandler = failureHandler; |
| |
| this.client = obtainClient(); |
| this.session = obtainSession(); |
| this.table = obtainTable(); |
| this.operationMapper = operationMapper; |
| } |
| |
| private KuduClient obtainClient() { |
| return new KuduClient.KuduClientBuilder(writerConfig.getMasters()).build(); |
| } |
| |
| private KuduSession obtainSession() { |
| KuduSession session = client.newSession(); |
| session.setFlushMode(writerConfig.getFlushMode()); |
| return session; |
| } |
| |
| private KuduTable obtainTable() throws IOException { |
| String tableName = tableInfo.getName(); |
| if (client.tableExists(tableName)) { |
| return client.openTable(tableName); |
| } |
| if (tableInfo.getCreateTableIfNotExists()) { |
| return client.createTable(tableName, tableInfo.getSchema(), tableInfo.getCreateTableOptions()); |
| } |
| throw new UnsupportedOperationException("table not exists and is marketed to not be created"); |
| } |
| |
| public void write(T input) throws IOException { |
| checkAsyncErrors(); |
| |
| for (Operation operation : operationMapper.createOperations(input, table)) { |
| checkErrors(session.apply(operation)); |
| } |
| } |
| |
| public void flushAndCheckErrors() throws IOException { |
| checkAsyncErrors(); |
| flush(); |
| checkAsyncErrors(); |
| } |
| |
| @VisibleForTesting |
| public DeleteTableResponse deleteTable() throws IOException { |
| String tableName = table.getName(); |
| return client.deleteTable(tableName); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| try { |
| flushAndCheckErrors(); |
| } finally { |
| try { |
| if (session != null) { |
| session.close(); |
| } |
| } catch (Exception e) { |
| log.error("Error while closing session.", e); |
| } |
| try { |
| if (client != null) { |
| client.close(); |
| } |
| } catch (Exception e) { |
| log.error("Error while closing client.", e); |
| } |
| } |
| } |
| |
| private void flush() throws IOException { |
| session.flush(); |
| } |
| |
| private void checkErrors(OperationResponse response) throws IOException { |
| if (response != null && response.hasRowError()) { |
| failureHandler.onFailure(Arrays.asList(response.getRowError())); |
| } else { |
| checkAsyncErrors(); |
| } |
| } |
| |
| private void checkAsyncErrors() throws IOException { |
| if (session.countPendingErrors() == 0) { return; } |
| |
| List<RowError> errors = Arrays.asList(session.getPendingErrors().getRowErrors()); |
| failureHandler.onFailure(errors); |
| } |
| } |