| /* |
| * 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.drill.exec.store.iceberg; |
| |
| import com.fasterxml.jackson.core.JsonGenerator; |
| import com.fasterxml.jackson.core.JsonParser; |
| import com.fasterxml.jackson.databind.DeserializationContext; |
| import com.fasterxml.jackson.databind.JsonNode; |
| import com.fasterxml.jackson.databind.SerializerProvider; |
| import com.fasterxml.jackson.databind.annotation.JsonDeserialize; |
| import com.fasterxml.jackson.databind.annotation.JsonSerialize; |
| import com.fasterxml.jackson.databind.deser.std.StdDeserializer; |
| import com.fasterxml.jackson.databind.ser.std.StdSerializer; |
| import org.apache.iceberg.CombinedScanTask; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.util.Base64; |
| import java.util.Objects; |
| import java.util.StringJoiner; |
| |
| @JsonSerialize(using = IcebergWork.IcebergWorkSerializer.class) |
| @JsonDeserialize(using = IcebergWork.IcebergWorkDeserializer.class) |
| public class IcebergWork { |
| private final CombinedScanTask scanTask; |
| |
| public IcebergWork(CombinedScanTask scanTask) { |
| this.scanTask = scanTask; |
| } |
| |
| public CombinedScanTask getScanTask() { |
| return this.scanTask; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| IcebergWork that = (IcebergWork) o; |
| return Objects.equals(scanTask, that.scanTask); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(scanTask); |
| } |
| |
| @Override |
| public String toString() { |
| return new StringJoiner(", ", IcebergWork.class.getSimpleName() + "[", "]") |
| .add("scanTask=" + scanTask) |
| .toString(); |
| } |
| |
| /** |
| * Special deserializer for {@link IcebergWork} class that deserializes |
| * {@code scanTask} field from byte array string created using {@link java.io.Serializable}. |
| */ |
| public static class IcebergWorkDeserializer extends StdDeserializer<IcebergWork> { |
| |
| private static final Logger logger = LoggerFactory.getLogger(IcebergWorkDeserializer.class); |
| |
| public IcebergWorkDeserializer() { |
| super(IcebergWork.class); |
| } |
| |
| @Override |
| public IcebergWork deserialize(JsonParser p, DeserializationContext ctxt) throws IOException { |
| JsonNode node = p.getCodec().readTree(p); |
| String scanTaskString = node.get(IcebergWorkSerializer.SCAN_TASK_FIELD).asText(); |
| try (ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(Base64.getDecoder().decode(scanTaskString)))) { |
| Object scanTask = ois.readObject(); |
| return new IcebergWork((CombinedScanTask) scanTask); |
| } catch (ClassNotFoundException e) { |
| logger.error(e.getMessage(), e); |
| } |
| |
| return null; |
| } |
| } |
| |
| /** |
| * Special serializer for {@link IcebergWork} class that serializes |
| * {@code scanTask} field to byte array string created using {@link java.io.Serializable} |
| * since {@link CombinedScanTask} doesn't use any Jackson annotations. |
| */ |
| public static class IcebergWorkSerializer extends StdSerializer<IcebergWork> { |
| |
| public static final String SCAN_TASK_FIELD = "scanTask"; |
| |
| public IcebergWorkSerializer() { |
| super(IcebergWork.class); |
| } |
| |
| @Override |
| public void serialize(IcebergWork value, JsonGenerator gen, SerializerProvider provider) throws IOException { |
| gen.writeStartObject(); |
| CombinedScanTask scanTask = value.getScanTask(); |
| try (ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); |
| ObjectOutputStream objectOutputStream = new ObjectOutputStream(byteArrayOutputStream)) { |
| objectOutputStream.writeObject(scanTask); |
| gen.writeStringField(SCAN_TASK_FIELD, Base64.getEncoder().encodeToString(byteArrayOutputStream.toByteArray())); |
| } |
| gen.writeEndObject(); |
| } |
| } |
| |
| } |