| /** |
| * 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.storm.streams; |
| |
| import org.apache.storm.topology.IRichSpout; |
| import org.apache.storm.utils.Utils; |
| |
| /** |
| * A spout node wraps an {@link IRichSpout}. |
| */ |
| class SpoutNode extends Node { |
| private final IRichSpout spout; |
| |
| SpoutNode(IRichSpout spout) { |
| super(Utils.DEFAULT_STREAM_ID, getOutputFields(spout, Utils.DEFAULT_STREAM_ID)); |
| if (outputFields.size() == 0) { |
| throw new IllegalArgumentException("Spout " + spout + " does not declare any fields" |
| + "for the stream '" + Utils.DEFAULT_STREAM_ID + "'"); |
| } |
| this.spout = spout; |
| } |
| |
| IRichSpout getSpout() { |
| return spout; |
| } |
| |
| @Override |
| void addOutputStream(String streamId) { |
| throw new UnsupportedOperationException("Cannot add output streams to a spout node"); |
| } |
| |
| } |