Github user gvramana commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1416#discussion_r145424680
--- Diff:
integration/spark2/src/main/scala/org/apache/carbondata/events/EventListenerExample.scala
---
@@ -0,0 +1,59 @@
+/*
+ * 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,
+ * 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 org.apache.carbondata.events
+
+import java.io.File
+
+import org.apache.spark.sql.SparkSession
+
+import org.apache.carbondata.core.metadata.CarbonTableIdentifier
+import org.apache.carbondata.processing.loading.model.CarbonLoadModel
+
+/**
+ * Example for event listener
+ */
+object EventListenerExample extends App {
+
+ ListenerBus.getInstance()
+ .addListener(LoadTablePreExecutionEvent.getClass.getName, new
EventListener {
+
+ override def onEvent(event: Event): Unit = {
+ println("Test event listener event")
+ }
+ })
+
+ import org.apache.spark.sql.CarbonSession._
+
+ val rootPath = new File(this.getClass.getResource("/").getPath
+ + "../../../..").getCanonicalPath
+ val storeLocation = s"$rootPath/examples/spark2/target/store"
+ val warehouse = s"$rootPath/examples/spark2/target/warehouse"
+ val sparkSession = SparkSession
+ .builder()
+ .master("local")
+ .appName("CarbonSessionExample")
+ .config("spark.sql.warehouse.dir", warehouse)
+ .config("spark.driver.host", "localhost")
+ .getOrCreateCarbonSession(storeLocation)
+ val carbonTableIdentifier = new CarbonTableIdentifier("db1", "tbl1",
"tbl1-id")
+ val carbonLoadModel = new CarbonLoadModel
--- End diff --
Example to be used how to subscribe to data load event
---
