[Feature][Connector-V2][Cassandra] Add Cassandra Source And Sink Conn…

…ector (#3229)

docs/en/Connector-v2-release-state.md

@@ -58,4 +58,6 @@ SeaTunnel uses a grading system for connectors to help you understand what to ex
 | [Kafka](connector-v2/source/kafka.md)                       | Source | Alpha  | 2.3.0-beta      |
 | [Kafka](connector-v2/sink/Kafka.md)                         | Sink   | Alpha  | 2.3.0-beta      |
 | [S3File](connector-v2/source/S3File.md)                     | Source | Alpha  | 2.3.0-beta      |
-| [S3File](connector-v2/sink/S3File.md)                       | Sink   | Alpha  | 2.3.0-beta      |
+| [S3File](connector-v2/sink/S3File.md)                       | Sink   | Alpha  | 2.3.0-beta      |
+| [Cassandra](connector-v2/source/Cassandra.md)               | Source | Alpha  | 2.3.0-beta      |
+| [Cassandra](connector-v2/sink/Cassandra.md)                 | Sink   | Alpha  | 2.3.0-beta      |

docs/en/connector-v2/sink/Cassandra.md

@@ -0,0 +1,98 @@
+# Cassandra
+
+> Cassandra sink connector
+
+## Description
+
+Write data to Apache Cassandra.
+
+## Key features
+
+- [ ] [exactly-once](../../concept/connector-v2-features.md)
+- [ ] [schema projection](../../concept/connector-v2-features.md)
+
+## Options
+
+| name              | type   | required | default value |
+|-------------------|--------|----------|---------------|
+| host              | String | Yes      | -             |
+| keyspace          | String | Yes      | -             |
+| table             | String | Yes      | -             |
+| username          | String | No       | -             |
+| password          | String | No       | -             |
+| datacenter        | String | No       | datacenter1   |
+| consistency_level | String | No       | LOCAL_ONE     |
+| fields            | String | No       | LOCAL_ONE     |
+| batch_size        | String | No       | 5000          |
+| batch_type        | String | No       | UNLOGGER      |
+| async_write       | String | No       | true          |
+
+### host [string]
+
+`Cassandra` cluster address, the format is `host:port` , allowing multiple `hosts` to be specified. Such as
+`"cassandra1:9042,cassandra2:9042"`.
+
+### keyspace [string]
+
+The `Cassandra` keyspace.
+
+### table [String]
+
+The `Cassandra` table name.
+
+### username [string]
+
+`Cassandra` user username.
+
+### password [string]
+
+`Cassandra` user password.
+
+### datacenter [String]
+
+The `Cassandra` datacenter, default is `datacenter1`.
+
+### consistency_level [String]
+
+The `Cassandra` write consistency level, default is `LOCAL_ONE`.
+
+### fields [array]
+
+The data field that needs to be output to `Cassandra` , if not configured, it will be automatically adapted 
+according to the sink table `schema`.
+
+### batch_size [number]
+
+The number of rows written through [Cassandra-Java-Driver](https://github.com/datastax/java-driver) each time, 
+default is `5000`.
+
+### batch_type [String]
+
+The `Cassandra` batch processing mode, default is `UNLOGGER`.
+
+### async_write [boolean]
+
+Whether `cassandra` writes in asynchronous mode, default is `true`.
+
+## Examples
+
+```hocon
+sink {
+ Cassandra {
+     host = "localhost:9042"
+     username = "cassandra"
+     password = "cassandra"
+     datacenter = "datacenter1"
+     keyspace = "test"
+    }
+}
+```
+
+## Changelog
+
+### next version
+
+- Add Cassandra Sink Connector
+
+
+

docs/en/connector-v2/source/Cassandra.md

@@ -0,0 +1,82 @@
+# Cassandra
+
+> Cassandra source connector
+
+## Description
+
+Read data from Apache Cassandra.
+
+## Key features
+
+- [x] [batch](../../concept/connector-v2-features.md)
+- [ ] [stream](../../concept/connector-v2-features.md)
+- [ ] [exactly-once](../../concept/connector-v2-features.md)
+- [x] [schema projection](../../concept/connector-v2-features.md)
+- [ ] [parallelism](../../concept/connector-v2-features.md)
+- [ ] [support user-defined split](../../concept/connector-v2-features.md)
+
+## Options
+
+| name                    | type   | required | default value |
+|-------------------------|--------|----------|---------------|
+| host                    | String | Yes      | -             |
+| keyspace                | String | Yes      | -             |
+| cql                     | String | Yes      | -             |
+| username                | String | No       | -             |
+| password                | String | No       | -             |
+| datacenter              | String | No       | datacenter1   |
+| consistency_level       | String | No       | LOCAL_ONE     |
+
+### host [string]
+
+`Cassandra` cluster address, the format is `host:port` , allowing multiple `hosts` to be specified. Such as
+`"cassandra1:9042,cassandra2:9042"`.
+
+### keyspace [string]
+
+The `Cassandra` keyspace.
+
+### cql [String]
+
+The query cql used to search data though Cassandra session.
+
+### username [string]
+
+`Cassandra` user username.
+
+### password [string]
+
+`Cassandra` user password.
+
+### datacenter [String]
+
+The `Cassandra` datacenter, default is `datacenter1`.
+
+### consistency_level [String]
+
+The `Cassandra` write consistency level, default is `LOCAL_ONE`.
+
+## Examples
+
+```hocon
+source {
+ Cassandra {
+     host = "localhost:9042"
+     username = "cassandra"
+     password = "cassandra"
+     datacenter = "datacenter1"
+     keyspace = "test"
+     cql = "select * from source_table"
+     result_table_name = "source_table"
+    }
+}
+```
+
+## Changelog
+
+### next version
+
+- Add Cassandra Source Connector
+
+
+

plugin-mapping.properties

@@ -139,5 +139,7 @@ seatunnel.source.S3File = connector-file-s3
 seatunnel.sink.S3File = connector-file-s3
 seatunnel.source.Amazondynamodb = connector-amazondynamodb
 seatunnel.sink.Amazondynamodb = connector-amazondynamodb
+seatunnel.source.Cassandra = connector-cassandra
+seatunnel.sink.Cassandra = connector-cassandra
 seatunnel.sink.StarRocks = connector-starrocks
-seatunnel.sink.InfluxDB = connector-influxdb
+seatunnel.sink.InfluxDB = connector-influxdb

seatunnel-connectors-v2/connector-cassandra/pom.xml

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ 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.
+  -->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>seatunnel-connectors-v2</artifactId>
+        <groupId>org.apache.seatunnel</groupId>
+        <version>${revision}</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>connector-cassandra</artifactId>
+
+    <properties>
+        <cassandra.driver.version>4.14.0</cassandra.driver.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.datastax.oss</groupId>
+            <artifactId>java-driver-core</artifactId>
+            <version>${cassandra.driver.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.seatunnel</groupId>
+            <artifactId>connector-common</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+    </dependencies>
+
+
+</project>

seatunnel-connectors-v2/connector-cassandra/src/main/java/org/apache/seatunnel/connectors/seatunnel/cassandra/client/CassandraClient.java

@@ -0,0 +1,65 @@
+/*
+ * 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.seatunnel.connectors.seatunnel.cassandra.client;
+
+import com.datastax.oss.driver.api.core.ConsistencyLevel;
+import com.datastax.oss.driver.api.core.CqlSession;
+import com.datastax.oss.driver.api.core.CqlSessionBuilder;
+import com.datastax.oss.driver.api.core.cql.ColumnDefinitions;
+import com.datastax.oss.driver.api.core.cql.SimpleStatement;
+import org.apache.commons.lang3.StringUtils;
+
+import java.net.InetSocketAddress;
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.stream.Collectors;
+
+public class CassandraClient {
+    public static CqlSessionBuilder getCqlSessionBuilder(String nodeAddress, String keyspace, String username, String password, String dataCenter) {
+        List<CqlSessionBuilder> cqlSessionBuilderList = Arrays.stream(nodeAddress.split(",")).map(address -> {
+            String[] nodeAndPort = address.split(":", 2);
+            if (StringUtils.isEmpty(username) && StringUtils.isEmpty(password)) {
+                return CqlSession.builder()
+                    .addContactPoint(new InetSocketAddress(nodeAndPort[0], Integer.parseInt(nodeAndPort[1])))
+                    .withKeyspace(keyspace)
+                    .withLocalDatacenter(dataCenter);
+            }
+            return CqlSession.builder()
+                .addContactPoint(new InetSocketAddress(nodeAndPort[0], Integer.parseInt(nodeAndPort[1])))
+                .withAuthCredentials(username, password)
+                .withKeyspace(keyspace)
+                .withLocalDatacenter(dataCenter);
+        }).collect(Collectors.toList());
+        return cqlSessionBuilderList.get(ThreadLocalRandom.current().nextInt(cqlSessionBuilderList.size()));
+    }
+
+    public static SimpleStatement createSimpleStatement(String cql, ConsistencyLevel consistencyLevel) {
+        return SimpleStatement.builder(cql).setConsistencyLevel(consistencyLevel).build();
+    }
+
+    public static ColumnDefinitions getTableSchema(CqlSession session, String table) {
+        try {
+            return session.execute(String.format("select * from %s limit 1", table))
+                .getColumnDefinitions();
+        } catch (Exception e) {
+            throw new RuntimeException("Cannot get table schema from cassandra", e);
+        }
+
+    }
+}