com.google.api.gax.batching.DefaultBatchResource Maven / Gradle / Ivy

Go to download
/*
 * Copyright 2023 Google LLC
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google LLC nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.google.api.gax.batching;

import com.google.auto.value.AutoValue;
import com.google.common.base.Preconditions;

/**
 * The default implementation of {@link BatchResource} which tracks the elementCount and byteCount.
 */
@AutoValue
abstract class DefaultBatchResource implements BatchResource {

  static DefaultBatchResource.Builder builder() {
    return new AutoValue_DefaultBatchResource.Builder();
  }

  @Override
  public BatchResource add(BatchResource resource) {
    Preconditions.checkArgument(
        resource instanceof DefaultBatchResource,
        "Expect an instance of DefaultBatchResource, got " + resource.getClass());
    DefaultBatchResource defaultResource = (DefaultBatchResource) resource;
    return new AutoValue_DefaultBatchResource.Builder()
        .setElementCount(getElementCount() + defaultResource.getElementCount())
        .setByteCount(getByteCount() + defaultResource.getByteCount())
        .build();
  }

  @Override
  public abstract long getElementCount();

  @Override
  public abstract long getByteCount();

  @Override
  public boolean shouldFlush(long maxElementThreshold, long maxBytesThreshold) {
    return getElementCount() > maxElementThreshold || getByteCount() > maxBytesThreshold;
  }

  @AutoValue.Builder
  abstract static class Builder {
    abstract Builder setElementCount(long elementCount);

    abstract Builder setByteCount(long byteCount);

    abstract DefaultBatchResource build();
  }
}