[GitHub] [carbondata] jackylk commented on a change in pull request #3171: [CARBONDATA-3337] Implemented Hadoop RPC framework for index server

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jackylk commented on a change in pull request #3171: [CARBONDATA-3337] Implemented Hadoop RPC framework for index server
URL: https://github.com/apache/carbondata/pull/3171#discussion_r277561873
 
 

 ##########
 File path: integration/spark2/src/main/scala/org/apache/carbondata/indexserver/IndexServer.scala
 ##########
 @@ -0,0 +1,105 @@
+/*
+ * 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.indexserver
+
+import java.net.InetSocketAddress
+
+import org.apache.hadoop.conf.Configuration
+import org.apache.hadoop.ipc.{ProtocolInfo, RPC}
+import org.apache.spark.SparkConf
+import org.apache.spark.sql.SparkSession
+import org.apache.spark.sql.util.SparkSQLUtil
+
+import org.apache.carbondata.common.logging.LogServiceFactory
+import org.apache.carbondata.core.datamap.DistributableDataMapFormat
+import org.apache.carbondata.core.exception.InvalidConfigurationException
+import org.apache.carbondata.core.indexstore.ExtendedBlocklet
+import org.apache.carbondata.core.metadata.schema.table.TableInfo
+import org.apache.carbondata.core.util.CarbonProperties
+
+@ProtocolInfo(protocolName = "Server", protocolVersion = 1)
+trait ServerInterface {
+  def getSplits(request: DistributableDataMapFormat): Array[(String, ExtendedBlocklet)]
+  def invalidateCache(tableInfo: TableInfo): Unit
+  def showCache()
+}
+
+object IndexServer extends ServerInterface {
+  val prunePolicy: String = CarbonProperties.getInstance().getIndexServerPolicy
+
+  private val LOGGER = LogServiceFactory.getLogService(this.getClass.getName)
+  private val serverIp: String = CarbonProperties.getInstance().getIndexServerIP
+
+  private val serverPort: Int = CarbonProperties.getInstance().getIndexServerPort
+
+  def getSplits(request: DistributableDataMapFormat): Array[(String, ExtendedBlocklet)] = {
+    new DistributedPruneRDD(SparkSQLUtil.getSparkSession, request, null).collect()
+  }
+
+  override def invalidateCache(tableInfo: TableInfo): Unit = {}
+
+  override def showCache(): Unit = {}
+
+  def main(args: Array[String]): Unit = {
+    if (serverIp.isEmpty) {
+      throw new RuntimeException(s"Please set the server IP to use $prunePolicy as the " +
+                                 s"pruning policy")
+    } else {
+      val (storePath, masterURL) = if (args.length == 1) {
+        (args.head, "local")
+      } else if (args.length == 2) {
+        (args.head, args.tail.head)
+      } else {
+        (null, "local")
+      }
+      createCarbonSession(storePath, masterURL)
+      LOGGER.info("Starting Index Cache Server")
+      val conf = new Configuration()
+      val server: RPC.Server = new RPC.Builder(conf).setInstance(this)
+        .setBindAddress(serverIp)
+        .setPort(serverPort)
+        .setProtocol(classOf[ServerInterface]).build
+      server.start()
+      LOGGER.info(s"Index cache server running on ${ server.getPort } port")
+    }
+  }
+
+  private def createCarbonSession(storePath: String, masterURL: String): SparkSession = {
+    import org.apache.spark.sql.CarbonSession._
+    val master = System.getProperty("spark.master.url", masterURL)
+    if (master == null) {
+      throw new InvalidConfigurationException("Spark master URL is not set.")
+    }
+    val spark = SparkSession
+      .builder().config(new SparkConf())
+      .master(master)
+      .appName("DistributedIndexServer")
+      .enableHiveSupport()
+      .config("spark.dynamicAllocation.enabled", "false")
+      .getOrCreateCarbonSession(storePath)
+    SparkSession.setActiveSession(spark)
+    SparkSession.setDefaultSession(spark)
+    spark
+  }
+
+  def getClient: ServerInterface = {
+    import org.apache.hadoop.ipc.RPC
 
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