I tried to deploy Base Starter for Vaadin Flow tutorial from Vaadin Tutorials in Spring 5 Sts with JDK-12 and also in Spring 4 and in Eclipse Oxygen 3a with JDK-1.8. None of them worked.
Option Spring Boot was chosen.
For JDK-12 had to add dependency for jaxb in pom.xml and change java version from 1.8 to 12. Java Compile compliance level to 12.
Here is the revised pom.xml
<?xml version="1.0" encoding="UTF-8"?><modelVersion>4.0.0</modelVersion>
<groupId>com.gmail.richard</groupId>
<artifactId>my-starter-project</artifactId>
<name>my-starter-project</name>
<version>2.0-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<maven.compiler.source>12</maven.compiler.source>
<maven.compiler.target>12</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<vaadin.version>14.0.0</vaadin.version>
<drivers.dir>${project.basedir}/drivers</drivers.dir>
<drivers.downloader.phase>pre-integration-test</drivers.downloader.phase>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.7.RELEASE</version>
</parent>
<pluginRepositories>
<pluginRepository>
<id>central</id>
<url>https://repo1.maven.org/maven2/</url>
<snapshots><enabled>false</enabled></snapshots>
</pluginRepository>
</pluginRepositories>
<repositories>
<repository>
<id>central</id>
<url>https://repo1.maven.org/maven2/</url>
<snapshots><enabled>false</enabled></snapshots>
</repository>
<!-- Repository used by many Vaadin add-ons -->
<repository>
<id>Vaadin Directory</id>
<url>https://maven.vaadin.com/vaadin-addons</url>
<snapshots><enabled>false</enabled></snapshots>
</repository>
</repositories>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-bom</artifactId>
<version>${vaadin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<build>
<defaultGoal>spring-boot:run</defaultGoal>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<!--
Take care of synchronizing java dependencies and imports in
package.json and main.js files.
It also creates webpack.config.js if not exists yet.
-->
<plugin>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-maven-plugin</artifactId>
<version>${vaadin.version}</version>
<executions>
<execution>
<goals>
<goal>prepare-frontend</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<!-- Production mode is activated using -Pproduction -->
<id>production</id>
<properties>
<vaadin.productionMode>true</vaadin.productionMode>
</properties>
<dependencies>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>flow-server-production-mode</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<jvmArguments>-Dvaadin.productionMode</jvmArguments>
</configuration>
</plugin>
<plugin>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>build-frontend</goal>
</goals>
<phase>compile</phase>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
<profile>
<id>integration-tests</id>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<id>start-spring-boot</id>
<phase>pre-integration-test</phase>
<goals>
<goal>start</goal>
</goals>
</execution>
<execution>
<id>stop-spring-boot</id>
<phase>post-integration-test</phase>
<goals>
<goal>stop</goal>
</goals>
</execution>
</executions>
</plugin>
<!-- Runs the integration tests (*IT) after the server is started -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
</execution>
</executions>
<configuration>
<trimStackTrace>false</trimStackTrace>
<enableAssertions>true</enableAssertions>
<systemPropertyVariables>
<!-- Pass location of downloaded webdrivers to the tests -->
<webdriver.chrome.driver>${webdriver.chrome.driver}</webdriver.chrome.driver>
</systemPropertyVariables>
</configuration>
</plugin>
<plugin>
<groupId>com.lazerycode.selenium</groupId>
<artifactId>driver-binary-downloader-maven-plugin</artifactId>
<version>1.0.17</version>
<configuration>
<onlyGetDriversForHostOperatingSystem>true
</onlyGetDriversForHostOperatingSystem>
<rootStandaloneServerDirectory>
${project.basedir}/drivers/driver
</rootStandaloneServerDirectory>
<downloadedZipFileDirectory>
${project.basedir}/drivers/driver_zips
</downloadedZipFileDirectory>
<customRepositoryMap>
${project.basedir}/drivers.xml
</customRepositoryMap>
</configuration>
<executions>
<execution>
<!-- use phase "none" to skip download step -->
<phase>${drivers.downloader.phase}</phase>
<goals>
<goal>selenium</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
</profiles>
This was the original error in pox.xml on line below, before jaxb dependency was added to pom.xml. After adding jaxb the pom error disappeared. However, when I run the project from the command line with mvn spring-boot:run, then the same error message appears.
<plugin>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-maven-plugin</artifactId>
<version>${vaadin.version}</version>
<executions>
<!-- Error occurs here -->
<execution>
<!-- ----------------- -->
<goals>
<goal>prepare-frontend</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
xecution default of goal com.vaadin:vaadin-maven-plugin:14.0.0:prepare-frontend failed:
======================================================================================================
Failed to determine ‘npm.cmd’ tool.
Please install it either:
- by following the https://nodejs.org/en/download/ guide to install it globally
- or by running the frontend-maven-plugin goal to install it in this project:
$ mvn com.github.eirslett:frontend-maven-plugin:1.7.6:install-node-and-npm -DnodeVersion=“v10.16.0”
======================================================================================================
I have globally installed node.js v9.11.1 and npm.cmd 5.8.0. npm does not seems to like any version of node.js above v9.
How can I resolve this error so that the project can run?