[jvm-packages] logging version number (#4271)

* print version number

* add property file

jvm-packages/pom.xml

@@ -212,6 +212,12 @@
         </snapshotRepository>
     </distributionManagement>
     <build>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
         <plugins>
             <plugin>
                 <groupId>org.scalastyle</groupId>

jvm-packages/xgboost4j-spark/src/main/scala/ml/dmlc/xgboost4j/scala/spark/XGBoost.scala

@@ -18,6 +18,7 @@ package ml.dmlc.xgboost4j.scala.spark
 
 import java.io.File
 import java.nio.file.Files
+import java.util.Properties
 
 import scala.collection.mutable.ListBuffer
 import scala.collection.{AbstractIterator, mutable}
@@ -31,7 +32,7 @@ import org.apache.commons.io.FileUtils
 import org.apache.commons.logging.LogFactory
 
 import org.apache.spark.rdd.RDD
-import org.apache.spark.{SparkContext, SparkParallelismTracker, TaskContext}
+import org.apache.spark.{SparkContext, SparkException, SparkParallelismTracker, TaskContext}
 import org.apache.spark.sql.{DataFrame, SparkSession}
 import org.apache.spark.storage.StorageLevel
 
@@ -386,7 +387,7 @@ object XGBoost extends Serializable {
       hasGroup: Boolean = false,
       evalSetsMap: Map[String, RDD[XGBLabeledPoint]] = Map()):
     (Booster, Map[String, Array[Float]]) = {
-    logger.info(s"XGBoost training with parameters:\n${params.mkString("\n")}")
+    logger.info(s"Running XGBoost ${spark.VERSION} with parameters:\n${params.mkString("\n")}")
     val (nWorkers, round, _, _, _, _, trackerConf, timeoutRequestWorkers,
       checkpointPath, checkpointInterval) = parameterFetchAndValidation(params,
       trainingData.sparkContext)

jvm-packages/xgboost4j-spark/src/main/scala/ml/dmlc/xgboost4j/scala/spark/package.scala

@@ -0,0 +1,48 @@
+/*
+ Copyright (c) 2014 by Contributors
+
+ Licensed 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,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+package ml.dmlc.xgboost4j.scala
+
+import java.util.Properties
+
+import org.apache.spark.SparkException
+
+package object spark {
+  private def loadVersionInfo(): String = {
+    val versionResourceFile = Thread.currentThread().getContextClassLoader.getResourceAsStream(
+      "xgboost4j-version.properties")
+    try {
+      val unknownProp = "<unknown>"
+      val props = new Properties()
+      props.load(versionResourceFile)
+      props.getProperty("version", unknownProp)
+    } catch {
+      case e: Exception =>
+        throw new SparkException("Error loading properties from xgboost4j-version.properties", e)
+    } finally {
+      if (versionResourceFile != null) {
+        try {
+          versionResourceFile.close()
+        } catch {
+          case e: Exception =>
+            throw new SparkException("Error closing xgboost4j version resource stream", e)
+        }
+      }
+    }
+  }
+
+  val VERSION: String = loadVersionInfo()
+}

jvm-packages/xgboost4j/src/main/resources/xgboost4j-version.properties

@@ -0,0 +1 @@
+version=${project.version}