987f5d6b96
- Introduced concept of converters to be able to serde generic datatype for SpillableMap - Fixed/Added configs to Hoodie Configs - Changed HoodieMergeHandle to start using SpillableMap
73 lines
2.3 KiB
Java
73 lines
2.3 KiB
Java
/*
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* Copyright (c) 2017 Uber Technologies, Inc. (hoodie-dev-group@uber.com)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*
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*/
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package com.uber.hoodie;
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import com.uber.hoodie.common.model.HoodieRecordPayload;
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import com.uber.hoodie.common.util.HoodieAvroUtils;
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import java.io.IOException;
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import java.util.Optional;
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import org.apache.avro.Schema;
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import org.apache.avro.generic.GenericRecord;
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import org.apache.avro.generic.IndexedRecord;
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/**
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* Default payload used for delta streamer.
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*
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* 1. preCombine - Picks the latest delta record for a key, based on an ordering field 2.
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* combineAndGetUpdateValue/getInsertValue - Simply overwrites storage with latest delta record
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*/
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public class OverwriteWithLatestAvroPayload extends BaseAvroPayload implements
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HoodieRecordPayload<OverwriteWithLatestAvroPayload> {
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/**
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*
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* @param record
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* @param orderingVal
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*/
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public OverwriteWithLatestAvroPayload(GenericRecord record, Comparable orderingVal) {
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super(record, orderingVal);
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}
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public OverwriteWithLatestAvroPayload(Optional<GenericRecord> record) {
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this(record.get(), (record1) -> 0); // natural order
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}
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@Override
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public OverwriteWithLatestAvroPayload preCombine(OverwriteWithLatestAvroPayload another) {
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// pick the payload with greatest ordering value
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if (another.orderingVal.compareTo(orderingVal) > 0) {
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return another;
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} else {
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return this;
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}
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}
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@Override
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public Optional<IndexedRecord> combineAndGetUpdateValue(IndexedRecord currentValue, Schema schema)
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throws IOException {
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// combining strategy here trivially ignores currentValue on disk and writes this record
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return getInsertValue(schema);
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}
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@Override
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public Optional<IndexedRecord> getInsertValue(Schema schema) throws IOException {
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return Optional.of(HoodieAvroUtils.rewriteRecord(record, schema));
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}
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}
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