46. Problems: Eclipse cannot run on server the gradle project

Error: Caused by: java.lang.IllegalStateException: Failed to determine project directory for dev mode. Directory '/home/eduard/Escriptori' does not look like a Maven or Gradle project. Ensure that you have run the prepare-frontend Maven goal, which generates 'flow-build-info.json', prior to deploying your application

Solution 1:

1. The target folder (delete and create again the target folder directly in the project folder)

2. Restart your computer (maybe an installed update was made recently and the computer needs to be restarted !!!!!)

Solution 2:

1. Delete the web.xml file in the src/main/webapp/WEB-INF folder. Eclipse tries to create it many times. Creating the empty file

beans.xml in this folder may prevent Eclipse from creating if

FROM HERE, it is OUTDATED

1. To run in debug mode (NOT in production) 

Method 1: Deleting the generated files and regenerate them

 1. Delete these files and folders from the project ( the ones with orange backgroud)

2. Refresh the project (Click on the project and press F5)

3. Edit the file gradle.properties and set in the file

vaadinVersion=20.0.6

4. Verify you are using gradle 6.6 7.1.1 -> Note that the projects that are not Vaadin use gtradle 6.6

5. Edit the file build.gradle

// New in the Vaadin starting project version 19+
buildscript {
    repositories {
        maven { setUrl("https://maven.vaadin.com/vaadin-prereleases") }
    }
}

plugins {
    id 'war'                                 //Generate a ".war" file
    id 'org.gretty' version '3.0.4'
    //id 'com.vaadin' version '20.0.0.alpha6'
    id 'com.vaadin' version '20.0.6'
    id 'java-library'  // only to admit "api" instead of "0.
    //id 'java-platform' //DON'T USE !!!! 
}

defaultTasks("clean", "build")

repositories {
    mavenCentral()
    //maven { url = "https://maven.vaadin.com/vaadin-addons" } //DON'T USE !!!

    jcenter() // jcenter is deprecated, however the Gretty plugin still uses stuff from jcenter: https://github.com/gretty-gradle-plugin/gretty/issues/192
}



project.war.destinationDirectory = file("$rootDir/../mytargets")  
project.archivesBaseName = 'p-aevaadin' 
project.version = '2.0'

gretty {
    contextPath = "/"  // it points to https://localhost:8080/
    servletContainer = "jetty9.4"
}


// The following pnpmEnable = true is not needed as pnpm is used by default,
// this is just an example of how to configure the Gradle Vaadin Plugin:
// for more configuraion options please see: https://vaadin.com/docs/latest/guide/start/gradle/#all-options
vaadin {
    pnpmEnable = true
    productionMode = false  //Not included in the starting-project generation 
    optimizeBundle = true
}

dependencies {
    // $vaadinVersion" is defined in gradle.properties
    //enforcedPlatform theoretically requires id java-platform
    //  but if you add it the FAILS!!! So don't put id 'java-platform' !!!
    implementation enforcedPlatform("com.vaadin:vaadin-bom:$vaadinVersion")

    // Vaadin
    //implementation("com.vaadin:vaadin-core")
    implementation("com.vaadin:vaadin")
    implementation("com.vaadin:vaadin-cdi")
    
    
    
    //providedCompile "javax.servlet:javax.servlet-api:3.1.0"   //generated by starting-project
    
    //Use only or jakarta.servet or jakarta.platform but not both at the same time --> genarate errors : The package jakarta.mail is accessible from more than one module: <unnamed>, jakarta.mail
    providedCompile "jakarta.servlet:jakarta.servlet-api:5.0.0" //replace javax by jakarta !!!!! 
    //providedCompile "jakarta.platform:jakarta.jakartaee-api:9.0.0" //replace javax by jakarta !!!!! 

    providedCompile "jakarta.annotation:jakarta.annotation-api:2.0.0"

    // logging
    // currently we are logging through the SLF4J API to SLF4J-Simple. See src/main/resources/simplelogger.properties file for the logger configuration
    implementation "org.slf4j:slf4j-simple:1.7.30"
    
    //=============LOMBOK BEGIN ============================
    // Not generated by the Vaadin starting-project
    compileOnly 'org.projectlombok:lombok:1.18.20'
    annotationProcessor 'org.projectlombok:lombok:1.18.20'
	
    testCompileOnly 'org.projectlombok:lombok:1.18.20'
    testAnnotationProcessor 'org.projectlombok:lombok:1.18.20'
    //=============LOMBOK END ==============================
    
	// This dependency is for local jars in the folder mylibs
    //implementation files(
    api files(
    	'../mytargets/a-annotations-1.0.jar', 
    	'../mytargets/a-basic-utils-1.0.jar', 
    	'../mytargets/a-report-utils-1.0.jar',
    	'../mytargets/b-base-control-model-1.0.jar', 
    	'../mytargets/b-other-utils-1.0.jar',
    	'../mytargets/c-dao-1.0.jar',
    	'../mytargets/c-model-aytos-1.0.jar',
    	//'../mytargets/c-model-castilla-1.0.jar',
    	//'../mytargets/c-model-eni-1.0.jar',
    	'../mytargets/c-model-gexflow-1.0.jar',
    	//'../mytargets/c-model-orve-1.0.jar',
    	'../mytargets/c-vaadin-basic-1.0.jar' )      
    
    implementation "org.jboss.weld.servlet:weld-servlet-shaded:3.1.7.Final"
    implementation "org.javassist:javassist:3.27.0-GA"
    providedCompile "jakarta.activation:jakarta.activation-api:2.0.1"
    implementation "com.sun.activation:jakarta.activation:2.0.1"
    
    /* HIbernate */
    implementation "org.hibernate:hibernate-core:5.4.31.Final"
    implementation "org.hibernate:hibernate-envers:5.4.31.Final"
    implementation "org.hibernate:hibernate-validator:7.0.1.Final" 
    
    /*DB Drivers */
    runtimeOnly "com.h2database:h2:1.4.200"
    implementation "org.postgresql:postgresql:42.2.20"
    implementation "net.sourceforge.jtds:jtds:1.3.1"
    
    /* Apache CMIS */
    implementation "org.apache.chemistry.opencmis:chemistry-opencmis-client-impl:1.1.0"
    
    /* JASPER REPORTS */
    implementation "net.sf.jasperreports:jasperreports:6.16.0"
    /* IText VELL pero el vol jasper reports*/
    implementation "com.lowagie:itext:2.1.7"
    implementation "com.itextpdf:itext7-core:7.1.15"  //Falta "type pom" ?????
   
    
}

6. Refresh Gradle (Right-click on the project -> Gradle -> Refresh Gradle project)

7. Clean the servers 

Right click on the first line (Tomcat) and click on these 2 actions

Now right click on the second line and select this action

8. Optionally run the Gradle task vaadinPrepareFrontEnd and vaasdinBuildFrontEnd

Verify that these files are created

if any of these files are missing, it is due to that the vaasdinBuildFrontEnd has not ended well maybe fail in the internet connection. NOTE that the target directory is missing! So the application maybe will not run!

Verify to Right-click on the project BuildPath ->Configure Build path ->Open the folder "project and External dependencies " and the folder "Web App Libraries" and click "Apply and Close" button

9. Right-click on the project and Run As -> Run on Server

2. To run in Production mode (NOT in debug) 

1. Change the variable productionMode to true in the file build.gradle 

2. Verify you are using gradle 6.6 7.1.1 -> Note that the projects that are not Vaadin use gtradle 6.6

3. Refresh Gradle (Right-click on the project -> Gradle -> Refresh Gradle project)

4. Execute the gradle task build

5. the war file should be generated