[cdc-common] Define pipeline options and schema change behaviors

This closes apache#2740

flink-cdc-common/src/main/java/com/ververica/cdc/common/pipeline/PipelineOptions.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2023 Ververica Inc.
+ *
+ * Licensed 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 com.ververica.cdc.common.pipeline;
+
+import com.ververica.cdc.common.annotation.PublicEvolving;
+import com.ververica.cdc.common.configuration.ConfigOption;
+import com.ververica.cdc.common.configuration.ConfigOptions;
+import com.ververica.cdc.common.configuration.description.Description;
+import com.ververica.cdc.common.configuration.description.ListElement;
+
+import static com.ververica.cdc.common.configuration.description.TextElement.text;
+
+/** Predefined pipeline configuration options. */
+@PublicEvolving
+public class PipelineOptions {
+    public static final ConfigOption<Integer> GLOBAL_PARALLELISM =
+            ConfigOptions.key("pipeline.global.parallelism")
+                    .intType()
+                    .noDefaultValue()
+                    .withDescription("The global parallelism of the pipeline");
+
+    public static final ConfigOption<SchemaChangeBehavior> SCHEMA_CHANGE_BEHAVIOR =
+            ConfigOptions.key("pipeline.schema.change.behavior")
+                    .enumType(SchemaChangeBehavior.class)
+                    .defaultValue(SchemaChangeBehavior.EVOLVE)
+                    .withDescription(
+                            Description.builder()
+                                    .text("Behavior for handling schema change events. ")
+                                    .linebreak()
+                                    .add(
+                                            ListElement.list(
+                                                    text(
+                                                            "EVOLVE: Apply schema changes to downstream. This requires sink to support handling schema changes."),
+                                                    text("IGNORE: Drop all schema change events."),
+                                                    text(
+                                                            "EXCEPTION: Throw an exception to terminate the sync pipeline.")))
+                                    .build());
+
+    public static final ConfigOption<String> SCHEMA_OPERATOR_UID =
+            ConfigOptions.key("pipeline.schema.operator.uid")
+                    .stringType()
+                    .defaultValue("$$_schema_operator_$$")
+                    .withDescription(
+                            "The unique ID for schema operator. This ID will be used for inter-operator communications and must be unique across operators.");
+
+    private PipelineOptions() {}
+}

flink-cdc-common/src/main/java/com/ververica/cdc/common/pipeline/SchemaChangeBehavior.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2023 Ververica Inc.
+ *
+ * Licensed 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 com.ververica.cdc.common.pipeline;
+
+import com.ververica.cdc.common.annotation.PublicEvolving;
+
+/** Behavior for handling schema changes. */
+@PublicEvolving
+public enum SchemaChangeBehavior {
+    EVOLVE,
+    IGNORE,
+    EXCEPTION
+}