Apache Storm和Apache Flink都是流式处理框架,但在某些方面有一些不同之处。以下是Apache Storm和Apache Flink之间的区别,包括一些代码示例:
编程模型:
示例代码(Apache Storm):
TopologyBuilder builder = new TopologyBuilder();
builder.setSpout("spout", new MySpout());
builder.setBolt("bolt", new MyBolt()).shuffleGrouping("spout");
StormSubmitter.submitTopology("my-topology", config, builder.createTopology());
示例代码(Apache Flink):
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
DataStream stream = env.addSource(new MySource());
SingleOutputStreamOperator result = stream.map(new MyMapper());
result.print();
env.execute("my-job");
数据处理语义:
示例代码(Apache Storm):
public class MyBolt extends BaseRichBolt {
@Override
public void execute(Tuple tuple, BasicOutputCollector collector) {
String word = tuple.getString(0);
// 处理逻辑
collector.emit(new Values(word));
}
}
示例代码(Apache Flink):
public class MyMapper extends RichMapFunction {
@Override
public String map(String value) {
// 处理逻辑
return value;
}
}
容错性:
示例代码(Apache Storm):
Config config = new Config();
config.setNumAckers(3);
config.setNumWorkers(5);
示例代码(Apache Flink):
env.enableCheckpointing(5000);
env.getCheckpointConfig().setCheckpointTimeout(30000);
执行引擎:
示例代码(Apache Storm): 无
示例代码(Apache Flink): 无
总的来说,Apache Storm和Apache Flink都是强大的流式处理框架,可以根据具体的需求和场景选择适合的框架。