streaming.core.compositor.spark.udf.SQLUDFCompositor.scala Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* See the License for the specific language governing permissions and
* limitations under the License.
*/
package streaming.core.compositor.spark.udf
import java.lang.reflect.Modifier
import java.util
import org.apache.log4j.Logger
import serviceframework.dispatcher.{Compositor, Processor, Strategy}
import streaming.core.CompositorHelper
import scala.collection.JavaConversions._
/**
* 7/4/16 WilliamZhu([email protected])
*/
class SQLUDFCompositor[T] extends Compositor[T] with CompositorHelper {
private var _configParams: util.List[util.Map[Any, Any]] = _
val logger = Logger.getLogger(classOf[SQLUDFCompositor[T]].getName)
override def initialize(typeFilters: util.List[String], configParams: util.List[util.Map[Any, Any]]): Unit = {
this._configParams = configParams
}
override def result(alg: util.List[Processor[T]], ref: util.List[Strategy[T]], middleResult: util.List[T], params: util.Map[Any, Any]): util.List[T] = {
val sc = (params)
val sqlContext = sparkSession(params)
_configParams(0).foreach { f =>
val objMethod = Class.forName(f._2.toString)
objMethod.getMethods.foreach { f =>
try {
if (Modifier.isStatic(f.getModifiers)) {
f.invoke(null, sqlContext.udf)
}
} catch {
case e: Exception =>
logger.info(s"${f.getName} missing",e)
}
}
}
middleResult
}
}