[FLINK-26820] Cassandra Sink V2 Implementation (FLIP-533) (Phase-1)

Author: Poorvankbhatia

flink-connector-cassandra/archunit-violations/dcfaa83d-a12c-48e1-9e51-b8d3808cd287

@@ -0,0 +1,101 @@
+/*
+ * 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.connector.cassandra.sink;
+
+import org.apache.flink.annotation.PublicEvolving;
+import org.apache.flink.api.connector.sink2.Sink;
+import org.apache.flink.api.connector.sink2.SinkWriter;
+import org.apache.flink.connector.cassandra.sink.config.CassandraSinkConfig;
+import org.apache.flink.connector.cassandra.sink.config.write.RequestConfiguration;
+import org.apache.flink.connector.cassandra.sink.exception.CassandraFailureHandler;
+import org.apache.flink.streaming.connectors.cassandra.ClusterBuilder;
+
+import java.io.IOException;
+
+/**
+ * A generic Flink {@link Sink} implementation for writing records to Apache Cassandra.
+ *
+ * <p>This sink supports multiple input types including POJOs, Tuples, Rows, and Scala Products.
+ *
+ * <p>Use {@link CassandraSinkBuilder} to create and configure instances of this sink.
+ *
+ * @param <INPUT> The input record type
+ */
+@PublicEvolving
+public class CassandraSink<INPUT> implements Sink<INPUT> {
+
+    private final CassandraSinkConfig<INPUT> sinkConfig;
+    private final ClusterBuilder clusterBuilder;
+    private final CassandraFailureHandler failureHandler;
+    private final RequestConfiguration requestConfiguration;
+
+    /**
+     * Package-private constructor - use {@link CassandraSinkBuilder} to create instances.
+     *
+     * @param sinkConfig The sink-specific configuration
+     * @param clusterBuilder Factory for building Cassandra cluster connections
+     * @param failureHandler Handler for retriable and fatal failures
+     * @param requestConfiguration Settings for concurrency, timeouts, and retries
+     */
+    CassandraSink(
+            CassandraSinkConfig<INPUT> sinkConfig,
+            ClusterBuilder clusterBuilder,
+            CassandraFailureHandler failureHandler,
+            RequestConfiguration requestConfiguration) {
+        this.sinkConfig = sinkConfig;
+        this.clusterBuilder = clusterBuilder;
+        this.failureHandler = failureHandler;
+        this.requestConfiguration = requestConfiguration;
+    }
+
+    /**
+     * Creates a new {@link SinkWriter} for this sink.
+     *
+     * @param context the sink context providing access to MailboxExecutor and metrics
+     * @return a new CassandraSinkWriter instance
+     * @throws IOException if writer creation fails
+     */
+    @Override
+    public SinkWriter<INPUT> createWriter(InitContext context) throws IOException {
+        return new CassandraSinkWriter<>(
+                this.requestConfiguration,
+                this.sinkConfig,
+                this.clusterBuilder,
+                this.failureHandler,
+                context.getMailboxExecutor(),
+                context.metricGroup());
+    }
+
+    // Package-private getters for testing
+    CassandraSinkConfig<INPUT> getSinkConfig() {
+        return sinkConfig;
+    }
+
+    ClusterBuilder getClusterBuilder() {
+        return clusterBuilder;
+    }
+
+    CassandraFailureHandler getFailureHandler() {
+        return failureHandler;
+    }
+
+    RequestConfiguration getRequestConfiguration() {
+        return requestConfiguration;
+    }
+}