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[FLINK-35243][cdc-common] Extends more schema change event types support
This close apache#3521.
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71 changes: 71 additions & 0 deletions
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flink-cdc-common/src/main/java/org/apache/flink/cdc/common/event/DropTableEvent.java
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| @@ -0,0 +1,71 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.flink.cdc.common.event; | ||
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| import org.apache.flink.cdc.common.annotation.PublicEvolving; | ||
| import org.apache.flink.cdc.common.source.DataSource; | ||
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| import java.util.Objects; | ||
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| /** | ||
| * A {@link SchemaChangeEvent} that represents an {@code DROP TABLE} DDL. this will be sent by | ||
| * {@link DataSource} before all {@link DataChangeEvent} with the same tableId. | ||
| */ | ||
| @PublicEvolving | ||
| public class DropTableEvent implements SchemaChangeEvent { | ||
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| private static final long serialVersionUID = 1L; | ||
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| private final TableId tableId; | ||
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| public DropTableEvent(TableId tableId) { | ||
| this.tableId = tableId; | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (!(o instanceof DropTableEvent)) { | ||
| return false; | ||
| } | ||
| DropTableEvent that = (DropTableEvent) o; | ||
| return Objects.equals(tableId, that.tableId); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(tableId); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return "DropTableEvent{" + "tableId=" + tableId + '}'; | ||
| } | ||
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| @Override | ||
| public TableId tableId() { | ||
| return tableId; | ||
| } | ||
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| @Override | ||
| public SchemaChangeEventType getType() { | ||
| return SchemaChangeEventType.DROP_TABLE; | ||
| } | ||
| } |
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37 changes: 37 additions & 0 deletions
37
...ommon/src/main/java/org/apache/flink/cdc/common/event/SchemaChangeEventWithPreSchema.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,37 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.flink.cdc.common.event; | ||
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| import org.apache.flink.cdc.common.annotation.PublicEvolving; | ||
| import org.apache.flink.cdc.common.schema.Schema; | ||
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| /** A {@link SchemaChangeEvent} that supports appending schema before change event. */ | ||
| @PublicEvolving | ||
| public interface SchemaChangeEventWithPreSchema extends SchemaChangeEvent { | ||
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| /** Describes if this event already has schema before change info. */ | ||
| boolean hasPreSchema(); | ||
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| /** Append schema before change info to this event. */ | ||
| void fillPreSchema(Schema oldSchema); | ||
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| /** Check if this event contains redundant schema change request only. */ | ||
| default boolean trimRedundantChanges() { | ||
| return false; | ||
| } | ||
| } |
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