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This module contains all API code. External dependencies should be limited. Any changes to public methods should be avoided. While the API module does not have compile time dependency on fluo-core, you must include fluo-core as a run-time dependency.

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/*
 * Copyright 2014 Fluo authors (see AUTHORS)
 * 
 * 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 io.fluo.api.observer;

import io.fluo.api.client.TransactionBase;

/**
 * Implemented by users to a watch a {@link io.fluo.api.data.Column} and be notified of changes to
 * the Column via the
 * {@link #process(TransactionBase, io.fluo.api.data.Bytes, io.fluo.api.data.Column)} method.
 * AbstractObserver extends {@link Observer} but provides a default implementation for the
 * {@link #init(Context)} and {@link #close()} method so that they can be optionally implemented by
 * user.
 */
public abstract class AbstractObserver implements Observer {

  @Override
  public void init(Context context) throws Exception {}

  @Override
  public void close() {}
}