313.4.3. 注解的 RDD 回调

import static org.apache.camel.component.spark.annotations.AnnotatedRddCallback.annotatedRddCallback;
 
@Bean
RddCallback<Long> rddCallback() {
    return annotatedRddCallback(new MyTransformation());
}
 
...
 
import org.apache.camel.component.spark.annotation.RddCallback;
 
public class MyTransformation {
 
    @RddCallback
    long countLines(JavaRDD<String> textFile, int first, int second) {
        return textFile.count() * first * second;
    }
 
}

import static org.apache.camel.component.spark.annotations.AnnotatedRddCallback.annotatedRddCallback;
 
@Bean
RddCallback<Long> rddCallback() {
    return annotatedRddCallback(new MyTransformation());
}
 
...
 
import org.apache.camel.component.spark.annotation.RddCallback;
 
public class MyTransformation {
 
    @RddCallback
    long countLines(JavaRDD<String> textFile, int first, int second) {
        return textFile.count() * first * second;
    }
 
}

import static org.apache.camel.component.spark.annotations.AnnotatedRddCallback.annotatedRddCallback;
 
@Bean
RddCallback<Long> rddCallback(CamelContext camelContext) {
    return annotatedRddCallback(new MyTransformation(), camelContext);
}
 
...

 
import org.apache.camel.component.spark.annotation.RddCallback;
 
public class MyTransformation {
 
    @RddCallback
    long countLines(JavaRDD<String> textFile, int first, int second) {
        return textFile.count() * first * second;
    }
 
}
 
...
 
// Convert String "10" to integer
long result = producerTemplate.requestBody("spark:rdd?rdd=#rdd&rddCallback=#rddCallback" Arrays.asList(10, "10"), long.class);

import static org.apache.camel.component.spark.annotations.AnnotatedRddCallback.annotatedRddCallback;
 
@Bean
RddCallback<Long> rddCallback(CamelContext camelContext) {
    return annotatedRddCallback(new MyTransformation(), camelContext);
}
 
...

 
import org.apache.camel.component.spark.annotation.RddCallback;
 
public class MyTransformation {
 
    @RddCallback
    long countLines(JavaRDD<String> textFile, int first, int second) {
        return textFile.count() * first * second;
    }
 
}
 
...
 
// Convert String "10" to integer
long result = producerTemplate.requestBody("spark:rdd?rdd=#rdd&rddCallback=#rddCallback" Arrays.asList(10, "10"), long.class);