spark/v3.5/spark/src/test/java/org/apache/iceberg/TestHadoopMetricsContextSerialization.java

/*
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 * 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,
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package org.apache.iceberg;

import java.io.IOException;
import org.apache.iceberg.hadoop.HadoopMetricsContext;
import org.apache.iceberg.io.FileIOMetricsContext;
import org.apache.iceberg.metrics.MetricsContext;
import org.apache.iceberg.relocated.com.google.common.collect.Maps;
import org.junit.jupiter.api.Test;

public class TestHadoopMetricsContextSerialization {

  @Test
  public void testHadoopMetricsContextKryoSerialization() throws IOException {
    MetricsContext metricsContext = new HadoopMetricsContext("s3");

    metricsContext.initialize(Maps.newHashMap());

    MetricsContext deserializedMetricContext = KryoHelpers.roundTripSerialize(metricsContext);
    // statistics are properly re-initialized post de-serialization
    deserializedMetricContext
        .counter(FileIOMetricsContext.WRITE_BYTES, MetricsContext.Unit.BYTES)
        .increment();
  }

  @Test
  public void testHadoopMetricsContextJavaSerialization()
      throws IOException, ClassNotFoundException {
    MetricsContext metricsContext = new HadoopMetricsContext("s3");

    metricsContext.initialize(Maps.newHashMap());

    MetricsContext deserializedMetricContext = TestHelpers.roundTripSerialize(metricsContext);
    // statistics are properly re-initialized post de-serialization
    deserializedMetricContext
        .counter(FileIOMetricsContext.WRITE_BYTES, MetricsContext.Unit.BYTES)
        .increment();
  }
}