Fixes #15661: Manage nashorn warning parameter from code

webapp/sources/rudder/rudder-web/src/main/scala/bootstrap/liftweb/RudderConfig.scala

@@ -1718,6 +1718,7 @@ object RudderConfig extends Loggable {
     )
     , new CreateSystemToken(roLDAPApiAccountRepository.systemAPIAccount)
     , new CheckApiTokenAutorizationKind(rudderDit, rwLdap)
+    , new CheckNashornWarning()
   )
 
   //////////////////////////////////////////////////////////////////////////////////////////

webapp/sources/rudder/rudder-web/src/main/scala/bootstrap/liftweb/checks/CheckNashornWarning.scala

@@ -0,0 +1,82 @@
+/*
+*************************************************************************************
+* Copyright 2019 Normation SAS
+*************************************************************************************
+*
+* This file is part of Rudder.
+*
+* Rudder is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* In accordance with the terms of section 7 (7. Additional Terms.) of
+* the GNU General Public License version 3, the copyright holders add
+* the following Additional permissions:
+* Notwithstanding to the terms of section 5 (5. Conveying Modified Source
+* Versions) and 6 (6. Conveying Non-Source Forms.) of the GNU General
+* Public License version 3, when you create a Related Module, this
+* Related Module is not considered as a part of the work and may be
+* distributed under the license agreement of your choice.
+* A "Related Module" means a set of sources files including their
+* documentation that, without modification of the Source Code, enables
+* supplementary functions or services in addition to those offered by
+* the Software.
+*
+* Rudder is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with Rudder.  If not, see <http://www.gnu.org/licenses/>.
+
+*
+*************************************************************************************
+*/
+
+package bootstrap.liftweb.checks
+
+import bootstrap.liftweb.BootstrapChecks
+import com.normation.rudder.domain.logger.ApplicationLogger
+import javax.servlet.UnavailableException
+import net.liftweb.common._
+
+import scala.util.control.NonFatal
+
+/**
+ * for openjdk>= 11, we need to remove a nashorn warning
+ */
+class CheckNashornWarning() extends BootstrapChecks {
+
+  override val description = "Check NashHorn JS engine for warning"
+
+  val nashornProp = "nashorn.args"
+  val nashornVal = "--no-deprecation-warning"
+
+  @throws(classOf[ UnavailableException ])
+  override def checks() : Unit = {
+    try {
+      val javaVersionElements = System.getProperty("java.version").split('.')
+      val major = Integer.parseInt(javaVersionElements(0))
+      if(major >= 11) {
+        ApplicationLogger.warn(s"Set '${nashornProp}=${nashornVal}' to avoid redundant deprecation warnings")
+        System.getProperty(nashornProp) match {
+          case null  => System.setProperty(nashornProp, nashornVal)
+          case value =>
+            if(!value.contains(nashornVal)) {
+              System.setProperty(nashornProp, value ++ " " ++ nashornVal)
+            } else {
+              // nothing
+            }
+        }
+      } else {
+        // ok, let things as they are.
+      }
+    } catch { // in case of error, don't touch anything
+      case NonFatal(ex) => // do nothing
+        logger.warn(s"Unable to remove NashHorn deprecation warning, exception was: ${ex.getMessage}")
+    }
+  }
+
+}