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Source code
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.exception;
020
021/**
022 * It is illegal to call onError() or onCompleted() when a call to onNext() is
023 * still outstanding, or to call onNext(), onError() or onCompleted() after a
024 * call to onError() or onCompleted() has been dispatched. Observers may throw
025 * an ObserverCompleted exception whenever this API is violated. Violating the
026 * API leaves the Observer (and any resources that it holds) in an undefined
027 * state, and throwing ObserverCompleted exceptions is optional.
028 * <p>
029 * Callers receiving this exception should simply pass it up the stack to the
030 * Aura runtime. They should not attempt to forward it on to upstream or
031 * downstream stages. The easiest way to do this is to ignore the exception
032 * entirely.
033 */
034public class ObserverCompletedException extends IllegalStateException {
035
036  private static final long serialVersionUID = 1L;
037
038}