Java Spark中的流文件流口水
我们能够成功地将drools与spark集成,当我们尝试应用drools中的规则时,我们能够对HDFS中的批处理文件进行处理,但我们尝试将drools用于流文件,以便我们能够立即做出决定,但是我们不知道怎么做。下面是我们试图实现的代码片段。Java Spark中的流文件流口水,java,apache-spark,hadoop,spark-streaming,drools,Java,Apache Spark,Hadoop,Spark Streaming,Drools,我们能够成功地将drools与spark集成,当我们尝试应用drools中的规则时,我们能够对HDFS中的批处理文件进行处理,但我们尝试将drools用于流文件,以便我们能够立即做出决定,但是我们不知道怎么做。下面是我们试图实现的代码片段。 案例1: SparkConf conf = new SparkConf().setAppName("sample"); JavaSparkContext sc = new JavaSparkContext(conf); JavaRD
案例1:
SparkConf conf = new SparkConf().setAppName("sample");
JavaSparkContext sc = new JavaSparkContext(conf);
JavaRDD<String> javaRDD = sc.textFile("/user/root/spark/sample.dat");
List<String> store = new ArrayList<String>();
store = javaRDD.collect();
SparkConf conf=new SparkConf().setAppName(“示例”);
JavaSparkContext sc=新的JavaSparkContext(conf);
JavaRDD JavaRDD=sc.textFile(“/user/root/spark/sample.dat”);
列表存储=新建ArrayList();
store=javaRDD.collect();
案例2:当我们使用流媒体上下文时
SparkConf sparkconf = new SparkConf().setAppName("sparkstreaming");
JavaStreamingContext ssc =
new JavaStreamingContext(sparkconf, new Duration(1));
JavaDStream<String> lines = ssc.socketTextStream("xx.xx.xx.xx", xxxx);
SparkConf SparkConf=new SparkConf().setAppName(“sparkstreaming”);
JavaStreamingContext ssc=
新的JavaStreamingContext(sparkconf,新的持续时间(1));
JavaDStream lines=ssc.socketTextStream(“xx.xx.xx.xx”,xxxx);
在第一种情况下,我们可以在变量存储上应用规则,但在第二种情况下,我们无法在dstream
行上应用规则
如果有人有一些想法,如何做到这一点,将是一个很大的帮助 这里有一种方法可以完成
//Create knowledge and session here
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newFileResource( "rulefile.drl"),
ResourceType.DRL );
Collection<KnowledgePackage> pkgs = kbuilder.getKnowledgePackages();
kbase.addKnowledgePackages( pkgs );
final StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession();
//在此处创建知识和会话
KnowledgeBase kbase=KnowledgeBaseFactory.newKnowledgeBase();
KnowledgeBuilder kbuilder=KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newFileResource(“rulefile.drl”),
ResourceType.DRL);
集合pkgs=kbuilder.getKnowledgePackages();
kbase.addKnowledgePackages(PKG);
final StatelessKnowledgeSession ksession=kbase.newStatelessKnowledgeSession();
SparkConf sparkconf = new SparkConf().setAppName("sparkstreaming");
JavaStreamingContext ssc =
new JavaStreamingContext(sparkconf, new Duration(1));
JavaDStream<String> lines = ssc.socketTextStream("xx.xx.xx.xx", xxxx);
SparkConf SparkConf=new SparkConf().setAppName(“sparkstreaming”);
JavaStreamingContext ssc=
新的JavaStreamingContext(sparkconf,新的持续时间(1));
JavaDStream lines=ssc.socketTextStream(“xx.xx.xx.xx”,xxxx);
lines.foreachRDD(new Function<JavaRDD<String>, Void>() {
@Override
public Void call(JavaRDD<String> rdd) throws Exception {
List<String> facts = rdd.collect();
//Apply rules on facts here
ksession.execute(facts);
return null;
}
});
lines.foreachRDD(新函数(){
@凌驾
公共Void调用(JavaRDD)引发异常{
List facts=rdd.collect();
//在这里应用事实规则
执行(事实);
返回null;
}
});
例如,我给user/root/,original将是user/vish/spark/sample.datDid@krishna gajula的答案工作?下面的答案对你有用吗?