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ASF GitHub Bot commented on FLINK-3311: --------------------------------------- Github user rmetzger commented on a diff in the pull request: https://github.com/apache/flink/pull/1771#discussion_r58548774 --- Diff: flink-streaming-connectors/flink-connector-cassandra/src/main/java/org/apache/flink/streaming/connectors/cassandra/CassandraCommitter.java --- @@ -0,0 +1,126 @@ +/** + * 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 + * <p/> + * http://www.apache.org/licenses/LICENSE-2.0 + * <p/> + * 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.cassandra; + +import com.datastax.driver.core.Cluster; +import com.datastax.driver.core.PreparedStatement; +import com.datastax.driver.core.Session; +import org.apache.flink.api.java.ClosureCleaner; +import org.apache.flink.streaming.runtime.operators.CheckpointCommitter; + +/** + * CheckpointCommitter that saves information about completed checkpoints within a separate table in a cassandra + * database. + * <p/> + * Entries are in the form |operator_id | subtask_id | last_completed_checkpoint| + */ +public class CassandraCommitter extends CheckpointCommitter { + private ClusterBuilder builder; + private transient Cluster cluster; + private transient Session session; + + private static final String KEYSPACE = "flink_auxiliary"; + private String TABLE = "checkpoints_"; --- End diff -- by convention, (non static) fields are lowercase > Add a connector for streaming data into Cassandra > ------------------------------------------------- > > Key: FLINK-3311 > URL: https://issues.apache.org/jira/browse/FLINK-3311 > Project: Flink > Issue Type: New Feature > Components: Streaming Connectors > Reporter: Robert Metzger > Assignee: Andrea Sella > > We had users in the past asking for a Flink+Cassandra integration. > It seems that there is a well-developed java client for connecting into > Cassandra: https://github.com/datastax/java-driver (ASL 2.0) > There are also tutorials out there on how to start a local cassandra instance > (for the tests): > http://prettyprint.me/prettyprint.me/2010/02/14/running-cassandra-as-an-embedded-service/index.html > For the data types, I think we should support TupleX types, and map standard > java types to the respective cassandra types. > In addition, it seems that there is a object mapper from datastax to store > POJOs in Cassandra (there are annotations for defining the primary key and > types) -- This message was sent by Atlassian JIRA (v6.3.4#6332)