stream.statistics.CountCheck Maven / Gradle / Ivy
/*
* streams library
*
* Copyright (C) 2011-2012 by Christian Bockermann, Hendrik Blom
*
* streams is a library, API and runtime environment for processing high
* volume data streams. It is composed of three submodules "stream-api",
* "stream-core" and "stream-runtime".
*
* The streams library (and its submodules) is free software: you can
* redistribute it and/or modify it under the terms of the
* GNU Affero General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* The stream.ai library (and its submodules) is distributed in the hope
* that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
package stream.statistics;
import stream.AbstractProcessor;
import stream.data.Data;
/**
* @author chris
*
*/
public class CountCheck extends AbstractProcessor {
Long myCount = 0L;
CountService countService = null;
/**
* @return the countService
*/
public CountService getCountService() {
return countService;
}
/**
* @param countService
* the countService to set
*/
public void setCountService(CountService countService) {
this.countService = countService;
}
/**
* @see stream.Processor#process(stream.data.Data)
*/
@Override
public Data process(Data input) {
myCount++;
if (countService == null)
throw new RuntimeException("No countService has been injected!");
Long count = countService.getCount();
if (!myCount.equals(count)) {
throw new RuntimeException("Count of CountService mismatches!");
}
return input;
}
}