我使用从另一个螺栓接收元组的螺栓(感叹号)并将其写入文件,我得到的问题是我有四次重复的结果,就像我发出一个单词,我发现这个词写了四次。问题可能在哪里?
public class PrinterBolty extends BaseBasicBolt {
@Override
public void execute(Tuple tuple, BasicOutputCollector collector) {
try {
BufferedWriter output;
output = new BufferedWriter(new FileWriter("/root/src/storm-starter/hh.txt", true));
output.newLine();
output.append(tuple.getString(0));
output.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public void declareOutputFields(OutputFieldsDeclarer ofd) {
}
}
答案 0 :(得分:1)
解决方案是在主类中指定1个喷口:
builder.setSpout(“spout”,new RandomSentenceSpout(),1);