Couldn't find the definition of the element with tag 'leaflet-map'

[jimbok8]

Trying to make a 'production' version of my program which is running OK in development mode.
Vaadin version 15.
Using vaadin.productionMode=true in application.properties.
Using mvn clean package -Pproduction on the command-line.
This produces a jar file, which I then run.
I get the following error message:

Failed to instantiate [com.jimbok8.railmap.RailmapApp]: Constructor threw exception; nested exception is java.lang.IllegalStateException: Couldn't find the definition of the element with tag 'leaflet-map' in any template file declared using '@JsModule' annotations. Check the availability of the template files in your WAR file or provide alternative implementation of the method getTemplateContent() which should return an element representing the content of the template file

[Gubancs]

Hi Jim,

Do you have any idea about what's wrong with the leaflet4vaadin addon?
I think if it works in development mode but doesn't work in production mode it should be a Vaadin Flow issue.

I found a similar issue: vaadin/flow#8493

Best Regards,
Gabor Kokeny

[jimbok8]

I now have everything working OK. Have compiled and produced production version which runs fine. I changed to Vaadin 16 don't know if that was the crucial change. Later when I get home I will post pom.xml

[jimbok8]

So below is the pom.xml that works for me in production mode, and produces a jar file of compiled frontend code.
In a cmd window I run
mvn package -Pproduction
or
mvn clean package -Pproduction

pom.xml (sorry, it's in two parts)
Jim

<?xml version="1.0" encoding="UTF-8" ?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.jimbok8</groupId>
<artifactId>Railmap</artifactId>
<name>RailmapV1.0</name>
<version>1.0-0</version>
<packaging>jar</packaging>

<properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

    <vaadin.version>16.0.0</vaadin.version>
</properties>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.0.RELEASE</version>
</parent>

<repositories>
    <!-- The order of definitions matters. Explicitly defining central here to make sure it has the highest priority. -->

    <!-- Main Maven repository -->
    <repository>
        <id>central</id>
        <url>https://repo.maven.apache.org/maven2</url>
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
    </repository>
    <!-- The current version of Flow 3.0 is a pre-release version, so vaadin-prereleases repository is needed. -->
    <repository>
        <id>vaadin-prereleases</id>
        <url>
            https://maven.vaadin.com/vaadin-prereleases/
        </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>

<pluginRepositories>
    <!-- Main Maven repository -->
    <pluginRepository>
        <id>central</id>
        <url>https://repo.maven.apache.org/maven2</url>
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
    </pluginRepository>
    <pluginRepository>
        <id>vaadin-prereleases</id>
        <url>
            https://maven.vaadin.com/vaadin-prereleases/
        </url>
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
    </pluginRepository>
</pluginRepositories>

<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>
                            
            <dependency>
                   <groupId>org.locationtech.jts</groupId>
                   <artifactId>jts-core</artifactId>
                   <version>1.16.1</version>
            </dependency>

            <dependency>
                <groupId>uk.me.jstott</groupId>
                <artifactId>jcoord</artifactId>
                <version>1.0</version>
            </dependency>
                                                                                                                                                                                                                                             
    
    <dependency>
        <groupId>com.vaadin</groupId>
        <!-- Replace artifactId with vaadin-core to use only free components -->
        <artifactId>vaadin</artifactId>
    </dependency>
    <dependency>
        <groupId>com.vaadin</groupId>
        <artifactId>leaflet4vaadin</artifactId>
        <version>0.3.0-beta</version>
    </dependency>
    <dependency>
        <groupId>com.vaadin</groupId>
        <artifactId>vaadin-spring-boot-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>com.vaadin</groupId>
        <artifactId>vaadin-testbench</artifactId>
        <scope>test</scope>
    </dependency>

    <!-- https://mvnrepository.com/artifact/io.github.bonigarcia/webdrivermanager -->
    <dependency>
        <groupId>io.github.bonigarcia</groupId>
        <artifactId>webdrivermanager</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>com.vaadin.componentfactory</groupId>
        <artifactId>togglebutton</artifactId>
        <version>1.0.0</version>
    </dependency>
</dependencies>

<build>
    <defaultGoal>spring-boot:run</defaultGoal>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <!-- Clean build and startup time for Vaadin apps sometimes may exceed
                 the default Spring Boot's 30sec timeout.  -->
            <configuration>
                <wait>500</wait>
                <maxAttempts>240</maxAttempts>
            </configuration>
        </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>com.vaadin</groupId>
                <artifactId>vaadin-maven-plugin</artifactId>
                <version>${vaadin.version}</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>prepare-frontend</goal>
                            <goal>build-frontend</goal>
                        </goals>
                    </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>
                    </configuration>
                </plugin>
            </plugins>
        </build>
    </profile>

</profiles>