org.apache.flink.table.planner.plan.nodes.exec.serde.ShuffleJsonDeserializer Maven / Gradle / Ivy
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This module bridges Table/SQL API and runtime. It contains
all resources that are required during pre-flight and runtime
phase. The content of this module is work-in-progress. It will
replace flink-table-planner once it is stable. See FLINK-11439
and FLIP-32 for more details.
/*
* 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.table.planner.plan.nodes.exec.serde;
import org.apache.flink.table.api.TableException;
import org.apache.flink.table.planner.plan.nodes.exec.ExecEdge;
import org.apache.flink.table.planner.plan.nodes.exec.ExecEdge.Shuffle;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.core.JsonParser;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.core.JsonProcessingException;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.DeserializationContext;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.JsonNode;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import java.io.IOException;
/** JSON deserializer for {@link Shuffle}. */
public class ShuffleJsonDeserializer extends StdDeserializer {
private static final long serialVersionUID = 1L;
public ShuffleJsonDeserializer() {
super(Shuffle.class);
}
@Override
public Shuffle deserialize(JsonParser jsonParser, DeserializationContext ctx)
throws IOException, JsonProcessingException {
JsonNode jsonNode = jsonParser.getCodec().readTree(jsonParser);
Shuffle.Type type = Shuffle.Type.valueOf(jsonNode.get("type").asText().toUpperCase());
switch (type) {
case ANY:
return ExecEdge.ANY_SHUFFLE;
case SINGLETON:
return ExecEdge.SINGLETON_SHUFFLE;
case BROADCAST:
return ExecEdge.BROADCAST_SHUFFLE;
case FORWARD:
return ExecEdge.FORWARD_SHUFFLE;
case HASH:
JsonNode keysNode = jsonNode.get("keys");
if (keysNode == null || keysNode.size() == 0) {
throw new TableException("Hash shuffle requires non-empty hash keys.");
}
int[] keys = new int[keysNode.size()];
for (int i = 0; i < keysNode.size(); ++i) {
keys[i] = keysNode.get(i).asInt();
}
return ExecEdge.hashShuffle(keys);
default:
throw new TableException("Unsupported shuffle type: " + type);
}
}
}