问题描述
我用以下方式编写了一个执行Vowpal Wabbit的java代码:
I wrote a java code to execute Vowpal Wabbit in the following way:
System.out.println("Executing command " + command);
final Runtime r = Runtime.getRuntime();
final Process p = r.exec(command);
System.out.println("waiting for the process");
try (final BufferedReader b = new BufferedReader(new InputStreamReader(p.getInputStream()))) {
String line;
while ((line = b.readLine()) != null) {
final T lineResult = textParser.parseLine(line);
parserResultCombiner.addToCombiner(lineResult);
}
}
p.waitFor();
System.out.println("done");
}
其中命令是
这样做的缺点是需要写入磁盘。经过一番搜索,我了解到vowpal wabbit支持从标准输入中读取数据
The disadvantage of this is that it requires writing to disk. After some searching, I learned that vowpal wabbit supports reading data from standard inputexample in R
我在Java 1.8中找不到任何完成此任务的示例。任何人都可以和我分享吗?
I could not find any example to accomplish this in Java 1.8. Could anyone share one with me?
推荐答案
你需要在守护进程模式下启动vw。这将启动一个侦听指定端口的进程。
You need to start vw in daemon mode. This starts a process that listens on the port specified.
$ vw -i model.vw -t --daemon --quiet --port 26542
守护程序启动后,您可以发送样本以使用套接字调用进行预测
Once the daemon has started, you can send samples to predict using socket calls
$ echo " abc-example| a b c" | netcat localhost 26542
0.000000 abc-example
$ echo " xyz-example| x y z" | netcat localhost 26542
1.000000 xyz-example
source:
最近,他们使用jni
推送了与vw交互的代码的java版本
Recently they pushed a java version of the code that interacts with vw using jnihttps://github.com/JohnLangford/vowpal_wabbit/tree/master/java
这篇关于Vowpal Wabbit无需写入磁盘即可执行的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!