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Add IcebergChangeEvent class Part 1 (#66)
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...zium-server-iceberg-sink/src/main/java/io/debezium/server/iceberg/IcebergChangeEvent.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,122 @@ | ||
| /* | ||
| * | ||
| * * Copyright memiiso Authors. | ||
| * * | ||
| * * Licensed under the Apache Software License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| */ | ||
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| package io.debezium.server.iceberg; | ||
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| import io.debezium.DebeziumException; | ||
| import io.debezium.engine.ChangeEvent; | ||
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| import java.util.*; | ||
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| import com.fasterxml.jackson.databind.JsonNode; | ||
| import com.fasterxml.jackson.databind.ObjectMapper; | ||
| import org.apache.iceberg.Schema; | ||
| import org.apache.iceberg.data.GenericRecord; | ||
| import org.apache.iceberg.exceptions.ValidationException; | ||
| import org.apache.iceberg.types.Types; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| /** | ||
| * @author Ismail Simsek | ||
| */ | ||
| public class IcebergChangeEvent<K,V> implements ChangeEvent<K,V> { | ||
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| private final ChangeEvent<K,V> event; | ||
| protected static final Logger LOGGER = LoggerFactory.getLogger(IcebergChangeEvent.class); | ||
| protected static final ObjectMapper objectMapper = new ObjectMapper(); | ||
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| public IcebergChangeEvent(ChangeEvent<K,V> e) { | ||
| event = e; | ||
| } | ||
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| @Override | ||
| public K key() { | ||
| return event.key(); | ||
| } | ||
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| @Override | ||
| public V value() { | ||
| return event.value(); | ||
| } | ||
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| @Override | ||
| public String destination() { | ||
| return event.destination(); | ||
| } | ||
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| public String destinationTable() { | ||
| return event.destination().replace(".","_"); | ||
| } | ||
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| public GenericRecord getIcebergRecord(Schema schema, JsonNode data) { | ||
| return IcebergUtil.getIcebergRecord(schema.asStruct(), data); | ||
| } | ||
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| public Schema getSchema() { | ||
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| if (this.value() == null) { | ||
| throw new RuntimeException("Failed to get event schema event value is null, destination:" + this.destination()); | ||
| } | ||
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| List<Types.NestedField> tableColumns = IcebergUtil.getIcebergFieldsFromEventSchema(getBytes(this.value())); | ||
| List<Types.NestedField> keyColumns = | ||
| IcebergUtil.getIcebergFieldsFromEventSchema(this.key() == null ? null : getBytes(this.key())); | ||
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| if (tableColumns.isEmpty()) { | ||
| throw new RuntimeException("Failed to get schema destination:" + this.destination()); | ||
| } | ||
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| return getSchema(tableColumns, keyColumns); | ||
| } | ||
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| private Schema getSchema(List<Types.NestedField> tableColumns, | ||
| List<Types.NestedField> keyColumns) { | ||
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| Set<Integer> identifierFieldIds = new HashSet<>(); | ||
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| for (Types.NestedField ic : keyColumns) { | ||
| boolean found = false; | ||
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| ListIterator<Types.NestedField> colsIterator = tableColumns.listIterator(); | ||
| while (colsIterator.hasNext()) { | ||
| Types.NestedField tc = colsIterator.next(); | ||
| if (Objects.equals(tc.name(), ic.name())) { | ||
| identifierFieldIds.add(tc.fieldId()); | ||
| // set column as required its part of identifier filed | ||
| colsIterator.set(tc.asRequired()); | ||
| found = true; | ||
| break; | ||
| } | ||
| } | ||
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| if (!found) { | ||
| throw new ValidationException("Table Row identifier field `" + ic.name() + "` not found in table columns"); | ||
| } | ||
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| } | ||
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| return new Schema(tableColumns, identifierFieldIds); | ||
| } | ||
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| protected byte[] getBytes(Object object) { | ||
| if (object instanceof byte[]) { | ||
| return (byte[]) object; | ||
| } | ||
| else if (object instanceof String) { | ||
| return ((String) object).getBytes(); | ||
| } | ||
| throw new DebeziumException(unsupportedTypeMessage(object)); | ||
| } | ||
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| protected String unsupportedTypeMessage(Object object) { | ||
| final String type = (object == null) ? "null" : object.getClass().getName(); | ||
| return "Unexpected data type '" + type + "'"; | ||
| } | ||
| } |
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