spring - 使用 Javaconfig 配置 HADOOP 作业

Question

我现在正在关注Spring HADOOP的介绍页面http://blog.springsource.org/2012/02/29/introducing-spring-hadoop/

示例配置是基于 xml 的。以下代码描述了 wordCount 示例。

<!-- define the job -->
<hdp:job id="word-count"
  input-path="/input/" output-path="/ouput/"
  mapper="org.apache.hadoop.examples.WordCount.TokenizerMapper"
  reducer="org.apache.hadoop.examples.WordCount.IntSumReducer"/>

<!-- execute the job -->
<bean id="runner" class="org.springframework.data.hadoop.mapreduce.JobRunner"
              p:jobs-ref="word-count"/>

有没有办法用 Javaconfig 配置这个例子？

Answer 1

@Configuration
@EnableHadoop
@PropertySource(value={"classpath:config/hadoop.properties"})
public class HadoopConfiguration extends SpringHadoopConfigurerAdapter {
@Override
public void configure(HadoopConfigConfigurer config) throws Exception {
    Properties props = new Properties();
    config.fileSystemUri("hdfs://");
    config.withProperties(props).property("propkey", "propvalue").and();
}
}