[GitHub] [incubator-kyuubi] zhaomin1423 commented on a diff in pull request #3261: [KYUUBI #3089] [FEATURE] Support to load custom event handlers by ServiceLoader

[GitBox <gi...@apache.org>]

zhaomin1423 commented on code in PR #3261:
URL: https://github.com/apache/incubator-kyuubi/pull/3261#discussion_r947949487


##########
kyuubi-events/src/main/scala/org/apache/kyuubi/events/handler/EventHandlerLoader.scala:
##########
@@ -0,0 +1,40 @@
+/*
+ * 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.kyuubi.events.handler
+
+import java.util.ServiceLoader
+
+import scala.collection.JavaConverters._
+import scala.collection.mutable.ArrayBuffer
+
+import org.apache.kyuubi.config.KyuubiConf
+import org.apache.kyuubi.events.KyuubiEvent
+
+object EventHandlerLoader {
+
+  def loadCustom(kyuubiConf: KyuubiConf): List[EventHandler[KyuubiEvent]] = {
+    val providers = ArrayBuffer[CustomEventHandlerProvider]()
+    ServiceLoader.load(
+      classOf[CustomEventHandlerProvider],
+      Thread.currentThread().getContextClassLoader)
+      .iterator()
+      .asScala
+      .foreach(provider => providers += provider)
+
+    providers.map(_.create(kyuubiConf)).toList

Review Comment:
   It will continue to throw it to the method of loadEventhandler. should we catch it?



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