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Posted to dev@jmeter.apache.org by GitBox <gi...@apache.org> on 2022/05/09 10:47:42 UTC
[GitHub] [jmeter] vlsi commented on a diff in pull request #712: Use kotlinx-coroutines for UI launcher
vlsi commented on code in PR #712:
URL: https://github.com/apache/jmeter/pull/712#discussion_r867880630
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src/core/src/main/java/org/apache/jmeter/JMeterGuiLauncher.kt:
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@@ -0,0 +1,151 @@
+/*
+ * 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.jmeter
+
+import com.thoughtworks.xstream.converters.ConversionException
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.swing.Swing
+import kotlinx.coroutines.withContext
+import kotlinx.coroutines.yield
+import org.apache.jmeter.gui.GuiPackage
+import org.apache.jmeter.gui.MainFrame
+import org.apache.jmeter.gui.action.ActionNames
+import org.apache.jmeter.gui.action.ActionRouter
+import org.apache.jmeter.gui.action.Load
+import org.apache.jmeter.gui.action.LookAndFeelCommand
+import org.apache.jmeter.gui.tree.JMeterTreeListener
+import org.apache.jmeter.gui.tree.JMeterTreeModel
+import org.apache.jmeter.gui.util.FocusRequester
+import org.apache.jmeter.save.SaveService
+import org.apache.jmeter.services.FileServer
+import org.apache.jmeter.util.JMeterUtils
+import org.apache.jorphan.collections.HashTree
+import org.apache.jorphan.gui.ComponentUtil
+import org.apache.jorphan.gui.JMeterUIDefaults
+import org.apache.jorphan.gui.ui.KerningOptimizer
+import org.slf4j.LoggerFactory
+import java.awt.event.ActionEvent
+import java.io.File
+
+public object JMeterGuiLauncher {
+ private val log = LoggerFactory.getLogger(JMeterGuiLauncher::class.java)
+
+ /**
+ * Starts up JMeter in GUI mode
+ */
+ @JvmStatic
+ public fun startGui(testFile: String?) {
+ println("================================================================================") //NOSONAR
+ println("Don't use GUI mode for load testing !, only for Test creation and Test debugging.") //NOSONAR
+ println("For load testing, use CLI Mode (was NON GUI):") //NOSONAR
+ println(" jmeter -n -t [jmx file] -l [results file] -e -o [Path to web report folder]") //NOSONAR
+ println("& increase Java Heap to meet your test requirements:") //NOSONAR
+ println(" Modify current env variable HEAP=\"-Xms1g -Xmx1g -XX:MaxMetaspaceSize=256m\" in the jmeter batch file") //NOSONAR
+ println("Check : https://jmeter.apache.org/usermanual/best-practices.html") //NOSONAR
+ println("================================================================================") //NOSONAR
+
+ runBlocking {
+ // See https://github.com/Kotlin/kotlinx.coroutines/blob/master/ui/coroutines-guide-ui.md
+ launch(Dispatchers.Swing) {
+ setupLaF()
+ val splash = SplashScreen()
+ splash.showScreen()
+ setProgress(splash, 10)
+ JMeterUtils.applyHiDPIOnFonts()
+ setProgress(splash, 20)
+ startGuiPartTwo(testFile, splash)
+ }
+ }
+ }
+
+ private fun setupLaF() {
+ KerningOptimizer.INSTANCE.maxTextLengthWithKerning =
+ JMeterUtils.getPropDefault("text.kerning.max_document_size", 10000)
+ JMeterUIDefaults.INSTANCE.install()
+ val jMeterLaf = LookAndFeelCommand.getPreferredLafCommand()
+ try {
+ log.info("Setting LAF to: {}", jMeterLaf)
+ LookAndFeelCommand.activateLookAndFeel(jMeterLaf)
+ } catch (ex: IllegalArgumentException) {
+ log.warn("Could not set LAF to: {}", jMeterLaf, ex)
+ }
+ }
+
+ private suspend fun startGuiPartTwo(testFile: String?, splash: SplashScreen) {
+ log.debug("Configure PluginManager")
+ setProgress(splash, 30)
+ log.debug("Setup tree")
+ val treeModel = JMeterTreeModel()
+ val treeLis = JMeterTreeListener(treeModel)
+ val instance = ActionRouter.getInstance()
+ setProgress(splash, 40)
+ log.debug("populate command map")
+ instance.populateCommandMap()
+ setProgress(splash, 60)
+ treeLis.setActionHandler(instance)
+ log.debug("init instance")
+ setProgress(splash, 70)
+ GuiPackage.initInstance(treeLis, treeModel)
+ setProgress(splash, 80)
+ log.debug("constructing main frame")
+ val main = MainFrame(treeModel, treeLis)
+ setProgress(splash, 100)
+ ComponentUtil.centerComponentInWindow(main, 80)
+ main.setLocationRelativeTo(splash)
+ main.isVisible = true
+ main.toFront()
+ instance.actionPerformed(ActionEvent(main, 1, ActionNames.ADD_ALL))
+ if (testFile != null) {
+ try {
+ val f: File
+ val tree: HashTree?
+ withContext(Dispatchers.Default) {
+ f = File(testFile)
+ log.info("Loading file: {}", f)
+ FileServer.getFileServer().setBaseForScript(f)
+ tree = SaveService.loadTree(f)
+ }
+ GuiPackage.getInstance().testPlanFile = f.absolutePath
+ Load.insertLoadedTree(1, tree)
+ } catch (e: ConversionException) {
+ log.error("Failure loading test file", e)
+ splash.close()
+ JMeterUtils.reportErrorToUser(SaveService.CEtoString(e))
+ } catch (e: Exception) {
+ log.error("Failure loading test file", e)
+ splash.close()
+ JMeterUtils.reportErrorToUser(e.toString())
+ }
+ } else {
+ val jTree = GuiPackage.getInstance().mainFrame.tree
+ val path = jTree.getPathForRow(0)
+ jTree.selectionPath = path
+ FocusRequester.requestFocus(jTree)
+ }
+ setProgress(splash, 100)
+ splash.close()
+ }
+
+ private suspend fun setProgress(splash: SplashScreen, progress: Int) {
+ splash.setProgress(progress)
+ // Allow UI updates
+ yield()
Review Comment:
@FSchumacher , this enables to make a brief pause in the execution of the current coroutine, and it immediately schedules the continuation. That allows Swing EDT to update the UI.
The code in `startGuiPartTwo` looks sequential, however, in practice, it is split into a sequence of chunks.
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