how to import jetty or gretty into my gradle script

Question

I am trying out gradle example "todo-webapp-jetty" from the book Gradle In Action. This can be found here. After several searches I came to know that jetty isn't supported anymore. Instead we need to use the gretty plugin(preferably the one that provided by org.gretty). But still no luck. My build script is same as the example's, just adjusted to use the gretty plugin.

Using the plugins block, this works fine , but only until I execute the jettyRun task. After executing the jettyRun task, the console is stuck at 87% :

plugins{
    id 'java'
    id 'war'
    id 'org.gretty' version '2.2.0'
}
............
    t<===========--> 87% EXECUTING [13s]a:509)
    > :jettyRun=--> 87% EXECUTING [12s]artifacts.configurations.DefaultConfiguration.access$1800> :jettyRun=--> 87% EXECUTING [12s]
    > :jettyRunorg.gradle.api.internal.artifacts.configurations.DefaultConfiguration$Configurati<===========--> 87% EXECUTING [12s]ts(DefaultConfiguration.java:1037)
    > :jettyRunorg.gradle.api.internal.artifacts.configurations.DefaultConfiguration$Configurati<===========--> 87% EXECUTING [12s]nfiguration.java:1025)
    > :jettyRun 81 more
    <===========--> 87% EXECUTING [12s]
    > :jettyRun
    > IDLE

EDIT 1 START : Posting the complete stacktrace

D:\Practice\Gradle\GradleInAction\todo-webapp-jetty>gradle jettyRun -is
Initialized native services in: C:\Users\am064763\.gradle\native
The client will now receive all logging from the daemon (pid: 48064). The daemon log file: C:\Users\am064763\.gradle\daemon\4.10.2\daemon-48064.out.log
Starting 2nd build in daemon [uptime: 10.343 secs, performance: 97%, GC rate: 0.50/s, tenured heap usage: 2% of 716.2 MB]
Using 8 worker leases.
Starting Build
another.gradle -->> This is executed during the initialization phase ---- timestamp  @ 2018-11-16T13:30:45
init.gradle -->> This is executed during the initialization phase ---- timestamp  @ 2018-11-16T13:30:45
zingAnother.gradle -->> This is executed during the initialization phase ---- timestamp  @ 2018-11-16T13:30:45
Settings evaluated using settings file 'D:\Practice\Gradle\GradleInAction\todo-webapp-jetty\settings.gradle'.
Projects loaded. Root project using build file 'D:\Practice\Gradle\GradleInAction\todo-webapp-jetty\build.gradle'.
Included projects: [root project 'todo-webapp-jetty']

> Configure project :
Evaluating root project 'todo-webapp-jetty' using build file 'D:\Practice\Gradle\GradleInAction\todo-webapp-jetty\build.gradle'.
All projects evaluated.
Selected primary task 'jettyRun' from project :
Tasks to be executed: [task ':prepareInplaceWebAppFolder', task ':createInplaceWebAppFolder', task ':compileJava', task ':processResources', task ':classes', task ':prepareInplaceWebAppClasses', task ':prepareInplaceWebApp', task ':jettyRun']
:prepareInplaceWebAppFolder (Thread[Task worker for ':' Thread 5,5,main]) started.

> Task :prepareInplaceWebAppFolder UP-TO-DATE
Skipping task ':prepareInplaceWebAppFolder' as it is up-to-date.
:prepareInplaceWebAppFolder (Thread[Task worker for ':' Thread 5,5,main]) completed. Took 0.111 secs.
:createInplaceWebAppFolder (Thread[Task worker for ':' Thread 5,5,main]) started.

> Task :createInplaceWebAppFolder UP-TO-DATE
Skipping task ':createInplaceWebAppFolder' as it is up-to-date.
:createInplaceWebAppFolder (Thread[Task worker for ':' Thread 5,5,main]) completed. Took 0.001 secs.
:compileJava (Thread[Task worker for ':' Thread 5,5,main]) started.

> Task :compileJava UP-TO-DATE
Skipping task ':compileJava' as it is up-to-date.
:compileJava (Thread[Task worker for ':' Thread 5,5,main]) completed. Took 0.048 secs.
:processResources (Thread[Task worker for ':' Thread 5,5,main]) started.

> Task :processResources NO-SOURCE
file or directory 'D:\Practice\Gradle\GradleInAction\todo-webapp-jetty\src\main\resources', not found
Skipping task ':processResources' as it has no source files and no previous output files.
:processResources (Thread[Task worker for ':' Thread 5,5,main]) completed. Took 0.001 secs.
:classes (Thread[Task worker for ':' Thread 5,5,main]) started.

> Task :classes UP-TO-DATE
Skipping task ':classes' as it has no actions.
:classes (Thread[Task worker for ':' Thread 5,5,main]) completed. Took 0.0 secs.
:prepareInplaceWebAppClasses (Thread[Task worker for ':' Thread 5,5,main]) started.

> Task :prepareInplaceWebAppClasses UP-TO-DATE
Skipping task ':prepareInplaceWebAppClasses' as it has no actions.
:prepareInplaceWebAppClasses (Thread[Task worker for ':' Thread 5,5,main]) completed. Took 0.0 secs.
:prepareInplaceWebApp (Thread[Task worker for ':' Thread 5,5,main]) started.

> Task :prepareInplaceWebApp UP-TO-DATE
Skipping task ':prepareInplaceWebApp' as it has no actions.
:prepareInplaceWebApp (Thread[Task worker for ':' Thread 5,5,main]) completed. Took 0.0 secs.
:jettyRun (Thread[Task worker for ':' Thread 5,5,main]) started.

> Task :jettyRun
Task ':jettyRun' is not up-to-date because:
  Task.upToDateWhen is false.

scanDir: D:\Practice\Gradle\GradleInAction\todo-webapp-jetty\src\main\webapp
scanDir: D:\Practice\Gradle\GradleInAction\todo-webapp-jetty\src\main\resources
scanDir: D:\Practice\Gradle\GradleInAction\todo-webapp-jetty\src\main\java
scanDir: D:\Practice\Gradle\GradleInAction\todo-webapp-jetty\build\classes\java\main
scanDir: D:\Practice\Gradle\GradleInAction\todo-webapp-jetty\build\resources\main
scanDir: C:\Users\am064763\.gradle\caches\modules-2\files-2.1\javax.servlet\javax.servlet-api\3.1.0\3cd63d075497751784b2fa84be59432f4905bf7c\javax.servlet-api-3.1.0.jar
scanDir: C:\Users\am064763\.gradle\caches\modules-2\files-2.1\javax.websocket\javax.websocket-api\1.0\fc843b649d4a1dcb0497669d262befa3918c7ba8\javax.websocket-api-1.0.jar
scanDir: C:\Users\am064763\.gradle\caches\modules-2\files-2.1\javax.servlet\servlet-api\2.5\5959582d97d8b61f4d154ca9e495aafd16726e34\servlet-api-2.5.jar
scanDir: C:\Users\am064763\.gradle\caches\modules-2\files-2.1\javax.servlet\jstl\1.1.2\3375e43c620df4f1114959400ff9bb90d12a2feb\jstl-1.1.2.jar
fastReloadMap={:=[org.akhikhl.gretty.FileReloadSpec(D:\Practice\Gradle\GradleInAction\todo-webapp-jetty\src\main\webapp, null, null)]}
Enabling hot deployment with interval of 1 second(s)
Resource missing. [HTTP GET: https://repo.maven.apache.org/maven2/org/gretty/gretty-runner-jetty9/2.2.0/gretty-runner-jetty9-2.2.0.pom]
Resource missing. [HTTP HEAD: https://repo.maven.apache.org/maven2/org/gretty/gretty-runner-jetty9/2.2.0/gretty-runner-jetty9-2.2.0.jar]
Stopping scanner
Exception in thread "Thread-52" org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException: Could not resolve all files for configuration ':grettyRunnerJetty9'.
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.rethrowFailure(DefaultConfiguration.java:1054)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.access$1700(DefaultConfiguration.java:123)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:1028)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.getFiles(DefaultConfiguration.java:444)        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration_Decorated.getFiles(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:98)
        at groovy.lang.MetaBeanProperty.getProperty(MetaBeanProperty.java:59)
        at org.gradle.internal.metaobject.BeanDynamicObject$MetaClassAdapter.getProperty(BeanDynamicObject.java:228)
        at org.gradle.internal.metaobject.BeanDynamicObject.tryGetProperty(BeanDynamicObject.java:171)
        at org.gradle.internal.metaobject.CompositeDynamicObject.tryGetProperty(CompositeDynamicObject.java:55)
        at org.gradle.internal.metaobject.AbstractDynamicObject.getProperty(AbstractDynamicObject.java:59)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration_Decorated.getProperty(Unknown Source)
        at org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.getProperty(PogoGetPropertySite.java:49)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:299)
        at org.akhikhl.gretty.DefaultLauncher.getRunnerClassPath(DefaultLauncher.groovy:30)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:98)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
        at org.gradle.internal.metaobject.BeanDynamicObject$MetaClassAdapter.invokeMethod(BeanDynamicObject.java:479)
        at org.gradle.internal.metaobject.BeanDynamicObject.tryInvokeMethod(BeanDynamicObject.java:191)
        at org.gradle.internal.metaobject.ConfigureDelegate.invokeMethod(ConfigureDelegate.java:78)
        at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeOnDelegationObjects(ClosureMetaClass.java:398)
        at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:338)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1034)
        at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:68)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:51)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:157)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:177)
        at org.akhikhl.gretty.DefaultLauncher$_javaExec_closure7.doCall(DefaultLauncher.groovy:90)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:98)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
        at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:264)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1034)
        at groovy.lang.Closure.call(Closure.java:418)
        at groovy.lang.Closure.call(Closure.java:434)
        at org.gradle.api.internal.ClosureBackedAction.execute(ClosureBackedAction.java:71)
        at org.gradle.util.ConfigureUtil.configureTarget(ConfigureUtil.java:155)
        at org.gradle.util.ConfigureUtil.configure(ConfigureUtil.java:106)
        at org.gradle.util.ConfigureUtil$WrappedConfigureAction.execute(ConfigureUtil.java:167)
        at org.gradle.api.internal.file.DefaultFileOperations.javaexec(DefaultFileOperations.java:224)
        at org.gradle.api.internal.project.DefaultProject.javaexec(DefaultProject.java:1102)
        at org.gradle.api.internal.project.DefaultProject.javaexec(DefaultProject.java:1097)
        at org.gradle.api.Project$javaexec$6.call(Unknown Source)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:128)
        at org.akhikhl.gretty.DefaultLauncher.javaExec(DefaultLauncher.groovy:89)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:98)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
        at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:352)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1034)
        at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:68)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:51)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:157)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:169)
        at org.akhikhl.gretty.LauncherBase$_launchThread_closure4.doCall(LauncherBase.groovy:256)
        at org.akhikhl.gretty.LauncherBase$_launchThread_closure4.doCall(LauncherBase.groovy)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:98)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
        at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:264)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1034)
        at groovy.lang.Closure.call(Closure.java:418)
        at groovy.lang.Closure.call(Closure.java:412)
        at groovy.lang.Closure.run(Closure.java:499)
        at java.lang.Thread.run(Thread.java:745)
Caused by: org.gradle.internal.resolve.ModuleVersionNotFoundException: Could not find org.gretty:gretty-runner-jetty9:2.2.0.
Searched in the following locations:
  - https://repo.maven.apache.org/maven2/org/gretty/gretty-runner-jetty9/2.2.0/gretty-runner-jetty9-2.2.0.pom
  - https://repo.maven.apache.org/maven2/org/gretty/gretty-runner-jetty9/2.2.0/gretty-runner-jetty9-2.2.0.jar
Required by:
    project :
        at org.gradle.internal.resolve.result.DefaultBuildableComponentResolveResult.notFound(DefaultBuildableComponentResolveResult.java:49)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver.resolveModule(RepositoryChainComponentMetaDataResolver.java:108)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver.resolve(RepositoryChainComponentMetaDataResolver.java:63)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.ComponentResolversChain$ComponentMetaDataResolverChain.resolve(ComponentResolversChain.java:94)
        at org.gradle.api.internal.artifacts.ivyservice.clientmodule.ClientModuleResolver.resolve(ClientModuleResolver.java:62)
<===========--> 87% EXECUTING [37s]artifacts.ivyservice.resolveengine.graph.builder.ComponentState.resolve(ComponentState.java:208)
> :jettyRunorg.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.builder.ComponentState.resolve(ComponentState.java:196)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.builder.ComponentState.getMetadata(ComponentState.java:152)
> :jettyRun=--> 87% EXECUTING [34s]artifacts.ivyservice.resolveengine.graph.builder.EdgeState.calculateTargetConfigurations(EdgeState.java:156)
<===========--> 87% EXECUTING [34s]artifacts.ivyservice.resolveengine.graph.builder.EdgeState.attachToTargetConfigurations(EdgeState.java:112)
> :jettyRunorg.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.builder.DependencyGraphBuilder.attachToTargetRevisionsSerially(DependencyGraphBuilder.java:315)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.builder.DependencyGraphBuilder.resolveEdges(DependencyGraphBuilder.java:202)
> :jettyRun=--> 87% EXECUTING [33s]artifacts.ivyservice.resolveengine.graph.builder.DependencyGraphBuilder.traverseGraph(DependencyGraphBuilder.java:155)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.builder.DependencyGraphBuilder.resolve(DependencyGraphBuilder.java:126)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.DefaultArtifactDependencyResolver.resolve(DefaultArtifactDependencyResolver.java:123)
> :jettyRun=--> 87% EXECUTING [33s]artifacts.ivyservice.DefaultConfigurationResolver.resolveGraph(DefaultConfigurationResolver.java:167)
<===========--> 87% EXECUTING [33s]artifacts.ivyservice.ShortCircuitEmptyConfigurationResolver.resolveGraph(ShortCircuitEmptyConfigurationResolver.java:89)
> :jettyRun=--> 87% EXECUTING [33s]artifacts.ivyservice.ErrorHandlingConfigurationResolver.resolveGraph(ErrorHandlingConfigurationResolver.java:73)
> :jettyRun=--> 87% EXECUTING [33s]artifacts.configurations.DefaultConfiguration$5.run(DefaultConfiguration.java:533)
> :jettyRun=--> 87% EXECUTING [33s]ations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:300)
> :jettyRunorg.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:292)
<===========--> 87% EXECUTING [32s]ations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:174)
> :jettyRunorg.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
        at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.resolveGraphIfRequired(DefaultConfig> :jettyRun=--> 87% EXECUTING [32s]
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.resolveToStateOrLater(DefaultConfiguration.java:509)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.access$1800(DefaultConfiguration.java:123)
> :jettyRun=--> 87% EXECUTING [32s]artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getSelectedArtifacts(DefaultConfiguration.java:1037)
> :jettyRunorg.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:1025)
        ... 81 more
> :jettyRun=--> 87% EXECUTING [10s]
> :jettyRun
> IDLE

EDIT 1 END

But without the plugins block this, doesn't work and whenever I run the build I get below error message :

apply plugin: 'java'
apply plugin: 'war'
apply plugin: 'org.gretty'

********

    FAILURE: Build failed with an exception.

    * Where:
    Build file 'D:\Practice\Gradle\GradleInAction\todo-webapp-jetty\build.gradle' line: 3

    * What went wrong:
    A problem occurred evaluating root project 'todo-webapp-jetty'.
    > Plugin with id 'org.gretty' not found.

EDIT 2 START My build.gradle :

plugins{
    id 'java'
    id 'war'
    id 'org.gretty' version '2.2.0'
}

repositories {
    mavenCentral()
    jcenter()
}

dependencies {
    providedCompile 'javax.servlet:servlet-api:2.5'
    runtime 'javax.servlet:jstl:1.1.2'
}

EDIT 2 END

Any guidance is greatly appreciated.

Answer 1

It is the "normal" behavior of Gradle when execute tasks that are launching and running an application (like jettyRun or bootRun) : you will see the <===---> XY% EXECUTING [...] message while the application is executing..

For example with Spring Boot bootRun task you would have:

$ ./gradlew bootRun

> Task :bootRun

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.0.6.RELEASE)

<=========----> 75% EXECUTING [1m 58s]
> :bootRun

You should configuring logging in your application, to make some log traces available in STDOUT , you would normally see that the application is properly started.

EDIT1

From your stacktrace:

Enabling hot deployment with interval of 1 second(s) Resource missing. [HTTP GET: https://repo.maven.apache.org/maven2/org/gretty/gretty-runner-jetty9/2.2.0/gretty-runner-jetty9-2.2.0.pom] Resource missing. [HTTP HEAD: https://repo.maven.apache.org/maven2/org/gretty/gretty-runner-jetty9/2.2.0/gretty-runner-jetty9-2.2.0.jar] Stopping scanner Exception in thread "Thread-52" org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException: Could not resolve all files for configuration ':grettyRunnerJetty9'.

==> you need to add jcenter() in your repositories block , because gretty-runner-jetty9-2.2.0.jar required dependency is not available in maven central repository.

repositories {
    jcenter()
    // your other repositories ...

}