Error while replacing jetty plugin to gretty plugi

Question

I have a JAX-RS project which have jetty plugin in gradle. I want to replace jetty plugin with gretty as jetty is not supported in gradle 4 and other versions. I get following errors while running gretty plugin.

Execution failed for task ':appRunWar'.

java.lang.Exception: com/sun/jersey/spi/inject/InjectableProvider

build.gradle code containing jetty plugin

apply plugin: 'java'
apply plugin: 'war'
apply plugin: 'jetty'
apply plugin: 'eclipse'
jettyRun {
    httpPort = 8080
    reload = 'automatic'
    scanIntervalSeconds = 2
    daemon = false
}
//other things....

build.gradle code for replacing jetty with gretty

apply plugin: 'java'
apply plugin: 'war'
apply from: 'https://raw.github.com/akhikhl/gretty/master/pluginScripts/gretty.plugin'
apply plugin: 'eclipse' 
gretty {
    httpPort = 8080
    //contextPath = '/'
    servletContainer = 'jetty9'
    httpEnabled = true
}
//other things...

Answer 1

First of all, do not use Akhikhl's gretty since its not maintained anymore and shows difficulties with certain jetty versions eg. jetty94 and jetty93. Additionally there is no support for Java versions 9 and 10. Instead you should rely on the gretty-gradle-plugin which is a direct maintained fork:

plugins {
    id 'java'
    id 'war'
    id 'eclipse'
    id 'org.gretty' version '2.1.0'
}

gretty {
    //contextPath = '/'
}

//other things...

The configuration you provide for gretty is the default configuration, you can drop it.
The default configuration in the ServerConfig.groovy looks like the following:

static ServerConfig getDefaultServerConfig(String serverName) {
    ServerConfig result = new ServerConfig()
    result.jvmArgs = []
    result.servletContainer = 'jetty9'
    result.managedClassReload = false
    result.httpEnabled = true
    result.httpsEnabled = false
    result.interactiveMode = 'stopOnKeyPress'
    result.scanInterval = 1
    result.loggingLevel = 'INFO'
    result.consoleLogEnabled = true
    result.fileLogEnabled = true
    result.logFileName = serverName
    result.redeployMode = 'restart'
    result.logDir = "${System.getProperty('user.home')}/logs" as String
    result.scanner = 'jetty'
    result.portPropertiesFileName = 'gretty_ports.properties'
    result.liveReloadEnabled = false
    return result
}

Be aware that the gretty-gradle-plugin can be found at 'org.gretty' where as Akhikhl's gretty is located at 'org.akhikhl.gretty'. If your error persists please provide a full stacktrace and update your answer accordingly.