com.metamx.emitter.core.BatchingStrategy Maven / Gradle / Ivy

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/*
 * Copyright 2012 - 2017 Metamarkets Group Inc.
 *
 * Licensed 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 com.metamx.emitter.core;

public enum BatchingStrategy
{
  ARRAY {

    @Override
    public int batchStartLength()
    {
      return 1;
    }

    @Override
    public int separatorLength()
    {
      return 1;
    }

    @Override
    public int batchEndLength()
    {
      return 2;
    }

    @Override
    public int writeBatchStart(byte[] buffer)
    {
      buffer[0] = '[';
      return batchStartLength();
    }

    @Override
    public int writeMessageSeparator(byte[] buffer, int bufferOffset)
    {
      buffer[bufferOffset] = ',';
      return bufferOffset + separatorLength();
    }

    @Override
    public int writeBatchEnd(byte[] buffer, int bufferOffset)
    {
      buffer[bufferOffset] = ']';
      buffer[bufferOffset + 1] = '\n';
      return bufferOffset + batchEndLength();
    }
  },
  NEWLINES {

    @Override
    public int batchStartLength()
    {
      return 0;
    }

    @Override
    public int separatorLength()
    {
      return 1;
    }

    @Override
    public int batchEndLength()
    {
      return 1;
    }

    @Override
    public int writeBatchStart(byte[] buffer)
    {
      // Write nothing
      return batchStartLength();
    }

    @Override
    public int writeMessageSeparator(byte[] buffer, int bufferOffset)
    {
      buffer[bufferOffset] = '\n';
      return bufferOffset + separatorLength();
    }

    @Override
    public int writeBatchEnd(byte[] buffer, int bufferOffset)
    {
      return writeMessageSeparator(buffer, bufferOffset);
    }
  },
  ONLY_EVENTS {
    @Override
    public int batchStartLength()
    {
      return 0;
    }

    @Override
    public int separatorLength()
    {
      return 0;
    }

    @Override
    public int batchEndLength()
    {
      return 0;
    }

    @Override
    public int writeBatchStart(byte[] buffer)
    {
      return 0;
    }

    @Override
    public int writeMessageSeparator(byte[] buffer, int bufferOffset)
    {
      return bufferOffset;
    }

    @Override
    public int writeBatchEnd(byte[] buffer, int bufferOffset)
    {
      return bufferOffset;
    }
  };

  public abstract int batchStartLength();

  public abstract int separatorLength();

  public abstract int batchEndLength();

  public abstract int writeBatchStart(byte[] buffer);

  public abstract int writeMessageSeparator(byte[] buffer, int bufferOffset);

  public abstract int writeBatchEnd(byte[] buffer, int bufferOffset);
}