001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.reef.wake.rx;
020
021import java.util.logging.Level;
022import java.util.logging.Logger;
023
024/**
025 * An {@link Observer} with logging-only onError and onCompleted() methods.
026 *
027 * @param <T> type
028 */
029public abstract class AbstractObserver<T> implements Observer<T> {
030
031  private static final Logger LOG = Logger.getLogger(AbstractObserver.class.getName());
032
033  @Override
034  public void onError(final Exception error) {
035    LOG.log(Level.INFO, "The observer " + this.getClass().toString() + "has received an Exception: " + error);
036  }
037
038  @Override
039  public void onCompleted() {
040    LOG.log(Level.FINEST, "The observer " + this.getClass().toString() + "has received an onCompleted() ");
041  }
042
043}