flume/src/main/java/org/apache/apex/malhar/flume/storage/DebugWrapper.java

/**
 * 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.apex.malhar.flume.storage;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.apache.flume.Context;
import org.apache.flume.conf.Configurable;

import com.datatorrent.api.Component;
import com.datatorrent.netlet.util.Slice;

/**
 * <p>DebugWrapper class.</p>
 *
 * @since 0.9.4
 */
public class DebugWrapper implements Storage, Configurable, Component<com.datatorrent.api.Context>
{
  HDFSStorage storage = new HDFSStorage();

  @Override
  public byte[] store(Slice bytes)
  {
    byte[] ret = null;

    try {
      ret = storage.store(bytes);
    } finally {
      logger.debug("storage.store(new byte[]{{}});", bytes);
    }

    return ret;
  }

  @Override
  public byte[] retrieve(byte[] identifier)
  {
    byte[] ret = null;

    try {
      ret = storage.retrieve(identifier);
    } finally {
      logger.debug("storage.retrieve(new byte[]{{}});", identifier);
    }

    return ret;
  }

  @Override
  public byte[] retrieveNext()
  {
    byte[] ret = null;
    try {
      ret = storage.retrieveNext();
    } finally {
      logger.debug("storage.retrieveNext();");
    }

    return ret;
  }

  @Override
  public void clean(byte[] identifier)
  {
    try {
      storage.clean(identifier);
    } finally {
      logger.debug("storage.clean(new byte[]{{}});", identifier);
    }
  }

  @Override
  public void flush()
  {
    try {
      storage.flush();
    } finally {
      logger.debug("storage.flush();");
    }
  }

  @Override
  public void configure(Context cntxt)
  {
    try {
      storage.configure(cntxt);
    } finally {
      logger.debug("storage.configure({});", cntxt);
    }
  }

  @Override
  public void setup(com.datatorrent.api.Context t1)
  {
    try {
      storage.setup(t1);
    } finally {
      logger.debug("storage.setup({});", t1);
    }

  }

  @Override
  public void teardown()
  {
    try {
      storage.teardown();
    } finally {
      logger.debug("storage.teardown();");
    }
  }

  private static final Logger logger = LoggerFactory.getLogger(DebugWrapper.class);
}