ujes/entrance/src/main/scala/com/webank/wedatasphere/linkis/entrance/interceptor/impl/SQLLimitEntranceInterceptor.scala

/*
 * Copyright 2019 WeBank
 *
 * 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 com.webank.wedatasphere.linkis.entrance.interceptor.impl

import com.webank.wedatasphere.linkis.entrance.interceptor.EntranceInterceptor
import com.webank.wedatasphere.linkis.protocol.query.RequestPersistTask
import com.webank.wedatasphere.linkis.protocol.task.Task

/**
  * created by enjoyyin on 2018/10/19
  * Description: LimitEntranceInterceptor Interceptors are used to set certain restrictions(拦截器用于对某些限制的设定)
  */
class SQLLimitEntranceInterceptor extends EntranceInterceptor {
  override def apply(task: Task, logAppender: java.lang.StringBuilder): Task = {
    task match {
      case requestPersistTask:RequestPersistTask => requestPersistTask.getEngineType.toLowerCase() match {
        case "hql" | "sql" | "jdbc"|"hive" => val executionCode = requestPersistTask.getExecutionCode
          SQLExplain.dealSQLLimit(executionCode, requestPersistTask, logAppender)
        case _ =>
      }
      requestPersistTask
      case _ => task
    }
  }
}