| /* |
| * 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.streaming.connectors.kudu; |
| |
| import org.apache.flink.configuration.Configuration; |
| import org.apache.flink.runtime.state.FunctionInitializationContext; |
| import org.apache.flink.runtime.state.FunctionSnapshotContext; |
| import org.apache.flink.streaming.api.checkpoint.CheckpointedFunction; |
| import org.apache.flink.streaming.api.functions.sink.RichSinkFunction; |
| import org.apache.flink.streaming.api.operators.StreamingRuntimeContext; |
| import org.apache.flink.streaming.connectors.kudu.connector.KuduConnector; |
| import org.apache.flink.streaming.connectors.kudu.connector.KuduRow; |
| import org.apache.flink.streaming.connectors.kudu.connector.KuduTableInfo; |
| import org.apache.flink.streaming.connectors.kudu.serde.KuduSerialization; |
| import org.apache.flink.util.Preconditions; |
| import org.apache.kudu.client.SessionConfiguration.FlushMode; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| |
| public class KuduSink<OUT> extends RichSinkFunction<OUT> implements CheckpointedFunction { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private static final Logger LOG = LoggerFactory.getLogger(KuduOutputFormat.class); |
| |
| private String kuduMasters; |
| private KuduTableInfo tableInfo; |
| private KuduConnector.Consistency consistency; |
| private KuduConnector.WriteMode writeMode; |
| private FlushMode flushMode; |
| |
| private KuduSerialization<OUT> serializer; |
| |
| private transient KuduConnector connector; |
| |
| public KuduSink(String kuduMasters, KuduTableInfo tableInfo, KuduSerialization<OUT> serializer) { |
| Preconditions.checkNotNull(kuduMasters,"kuduMasters could not be null"); |
| this.kuduMasters = kuduMasters; |
| |
| Preconditions.checkNotNull(tableInfo,"tableInfo could not be null"); |
| this.tableInfo = tableInfo; |
| this.consistency = KuduConnector.Consistency.STRONG; |
| this.writeMode = KuduConnector.WriteMode.UPSERT; |
| this.serializer = serializer.withSchema(tableInfo.getSchema()); |
| } |
| |
| public KuduSink<OUT> withEventualConsistency() { |
| this.consistency = KuduConnector.Consistency.EVENTUAL; |
| return this; |
| } |
| |
| public KuduSink<OUT> withStrongConsistency() { |
| this.consistency = KuduConnector.Consistency.STRONG; |
| return this; |
| } |
| |
| public KuduSink<OUT> withUpsertWriteMode() { |
| this.writeMode = KuduConnector.WriteMode.UPSERT; |
| return this; |
| } |
| |
| public KuduSink<OUT> withInsertWriteMode() { |
| this.writeMode = KuduConnector.WriteMode.INSERT; |
| return this; |
| } |
| |
| public KuduSink<OUT> withUpdateWriteMode() { |
| this.writeMode = KuduConnector.WriteMode.UPDATE; |
| return this; |
| } |
| |
| public KuduSink<OUT> withSyncFlushMode() { |
| this.flushMode = FlushMode.AUTO_FLUSH_SYNC; |
| return this; |
| } |
| |
| public KuduSink<OUT> withAsyncFlushMode() { |
| this.flushMode = FlushMode.AUTO_FLUSH_BACKGROUND; |
| return this; |
| } |
| |
| @Override |
| public void open(Configuration parameters) throws IOException { |
| if (this.connector != null) return; |
| this.connector = new KuduConnector(kuduMasters, tableInfo, consistency, writeMode, getflushMode()); |
| this.serializer.withSchema(tableInfo.getSchema()); |
| } |
| |
| /** |
| * If flink checkpoint is disable,synchronously write data to kudu. |
| * <p>If flink checkpoint is enable, asynchronously write data to kudu by default. |
| * |
| * <p>(Note: async may result in out-of-order writes to Kudu. |
| * you also can change to sync by explicitly calling {@link KuduSink#withSyncFlushMode()} when initializing KuduSink. ) |
| * |
| * @return flushMode |
| */ |
| private FlushMode getflushMode() { |
| FlushMode flushMode = FlushMode.AUTO_FLUSH_SYNC; |
| boolean enableCheckpoint = ((StreamingRuntimeContext) getRuntimeContext()).isCheckpointingEnabled(); |
| if(enableCheckpoint && this.flushMode == null) { |
| flushMode = FlushMode.AUTO_FLUSH_BACKGROUND; |
| } |
| if(enableCheckpoint && this.flushMode != null) { |
| flushMode = this.flushMode; |
| } |
| return flushMode; |
| } |
| |
| @Override |
| public void invoke(OUT row) throws Exception { |
| KuduRow kuduRow = serializer.serialize(row); |
| boolean response = connector.writeRow(kuduRow); |
| |
| if(!response) { |
| throw new IOException("error with some transaction"); |
| } |
| } |
| |
| @Override |
| public void close() throws Exception { |
| if (this.connector == null) return; |
| try { |
| this.connector.close(); |
| } catch (Exception e) { |
| throw new IOException(e.getLocalizedMessage(), e); |
| } |
| } |
| |
| @Override |
| public void initializeState(FunctionInitializationContext context) throws Exception { |
| } |
| |
| @Override |
| public void snapshotState(FunctionSnapshotContext context) throws Exception { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Snapshotting state {} ...", context.getCheckpointId()); |
| } |
| this.connector.flush(); |
| } |
| } |