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Examples from the Rama documentation

License: Apache License 2.0

Java 100.00%

rama-examples's Introduction

rama-examples

This repository contains examples from the Rama documentation. To see short, end-to-end, thoroughly commented examples of using Rama check out rama-demo-gallery.

Rama currently only works on macOS or Linux and doesn't work on Windows.

As explained in the docs, you can start a Groovy REPL with:

mvn compile
mvn gplus:shell

This is a great way to run the examples or experiment.

Please note: you should use Java 17 or below in order to avoid problems running the Groovy REPL.

rama-examples's People

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grojas123 crimeminister keekiatpang edgenard asmoeboe chrisblom jasonjckn simon-katz

rama-examples's Issues

System map startup failure on MS-Windows/Java 17

Hi,

I'm getting an error when I try to run the Hello World example on MS-Windows 11:

07:19:47.898 [Conductor-bootstrap-0] ERROR rpl.rama.distributed.util.rama-component.core - [sys:Conductor] System startup failed, attempting to stop running components...
07:19:47.921 [Conductor-bootstrap-0] ERROR rpl.rama.distributed.simulate.inproc-cluster - Encountered error in mk-process-cluster.
clojure.lang.ExceptionInfo: System map startup failed; cleanup complete
...
Caused by: clojure.lang.ExceptionInfo: unexpected Throwable while performing async action on component!
        at rpl.rama.distributed.util.rama_component.core$update_component$if_fn__58312__auto____69729.invoke(core.clj:480) ~[rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$promise_if_STAR_$fn__58300$fn__58302.invoke(watchable_promise.clj:491) ~[rama-0.9.0.jar:?]
        ... 13 more
Caused by: java.lang.IllegalArgumentException: Path must start with / character
        at org.apache.curator.utils.PathUtils.validatePath(PathUtils.java:54) ~[curator-client-5.3.0.jar:?]
        at org.apache.curator.utils.PathUtils.validatePath(PathUtils.java:37) ~[curator-client-5.3.0.jar:?]
        at org.apache.curator.utils.ZKPaths.fixForNamespace(ZKPaths.java:107) ~[curator-client-5.3.0.jar:?]
...
ERROR clojure.lang.ExceptionInfo:
System map startup failed; cleanup complete
        at rpl.rama.util.exception$fn__21097.invokeStatic (exception.clj:99)
ERROR java.lang.IllegalArgumentException:
Error when handling error: System map startup failed; cleanup complete
        at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0 (Native Method)
FATAL: groovy.lang.MissingMethodException: No signature of method: java.lang.StringBuilder.setLength() is applicable for argument types: (Integer) values: [0]
groovy.lang.MissingMethodException: No signature of method: java.lang.StringBuilder.setLength() is applicable for argument types: (Integer) values: [0]

To reproduce on MS-Windows 11 with Java 17

PS C:\src\rama-examples> C:\Users\xyz\scoop\apps\maven\3.9.4\bin\mvn.cmd compile
[INFO] Scanning for projects...
[INFO]
[INFO] -----------------------< com.rpl:rama-examples >------------------------
[INFO] Building rama-examples 1.0.0-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- resources:3.3.1:resources (default-resources) @ rama-examples ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory C:\src\rama-examples\src\main\resources
[INFO]
[INFO] --- compiler:3.11.0:compile (default-compile) @ rama-examples ---
[INFO] Changes detected - recompiling the module! :source
[WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. build is platform dependent!
[INFO] Compiling 85 source files with javac [debug target 8] to target\classes
[WARNING] bootstrap class path not set in conjunction with -source 8
[INFO] /C:/src/rama-examples/src/main/java/rama/examples/paths/CustomKey.java: Some input files use unchecked or unsafe operations.
[INFO] /C:/src/rama-examples/src/main/java/rama/examples/paths/CustomKey.java: Recompile with -Xlint:unchecked for details.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  3.292 s
[INFO] Finished at: 2023-08-23T
[INFO] ------------------------------------------------------------------------
PS C:\src\rama-examples> C:\Users\xyz\scoop\apps\maven\3.9.4\bin\mvn.cmd gplus:shell
[INFO] Scanning for projects...
[INFO]
[INFO] -----------------------< com.rpl:rama-examples >------------------------
[INFO] Building rama-examples 1.0.0-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- gplus:1.13.1:shell (default-cli) @ rama-examples ---
[INFO] Using isolated classloader, without GMavenPlus classpath.
[INFO] Using Groovy 3.0.9 to perform shell.
groovy:000> rama.examples.tutorial.HelloWorldModule.main(null)
07:19:47.898 [Conductor-bootstrap-0] ERROR rpl.rama.distributed.util.rama-component.core - [sys:Conductor] System startup failed, attempting to stop running components...
07:19:47.921 [Conductor-bootstrap-0] ERROR rpl.rama.distributed.simulate.inproc-cluster - Encountered error in mk-process-cluster.
clojure.lang.ExceptionInfo: System map startup failed; cleanup complete
        at rpl.rama.distributed.util.rama_component.core$run_system_async$fn__69969$fn__69973.invoke(core.clj:733) ~[rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watch_success$fn__58230.invoke(watchable_promise.clj:77) ~[rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invokeStatic(watchable_promise.clj:97) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invoke(watchable_promise.clj:94) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240$fn__58241$invoke_watch_ev__58242.invoke(watchable_promise.clj:195) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at rpl.rama.util.exec_serv$wrap_runnable_with_log_and_swallow_throwables$fn__50476.invoke(exec_serv.clj:84) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) [?:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
        at rpl.rama.util.exec_serv$direct_executor$submit50581_impl__50607.invoke(exec_serv.clj:412) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv.FastDirectExecutor.submit(Unknown Source) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$task_decorating_executor_service$reify__50497.submit(exec_serv.clj:220) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$unsafe_submit.invokeStatic(exec_serv.clj:114) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$unsafe_submit.invoke(exec_serv.clj:106) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240$fn__58241.invoke(watchable_promise.clj:193) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240.invoke(watchable_promise.clj:192) [rama-0.9.0.jar:?]
        at clojure.lang.PersistentVector.reduce(PersistentVector.java:343) [clojure-1.11.1.jar:?]
        at clojure.core$reduce.invokeStatic(core.clj:6885) [clojure-1.11.1.jar:?]
        at clojure.core$reduce.invoke(core.clj:6868) [clojure-1.11.1.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237.invoke(watchable_promise.clj:190) [rama-0.9.0.jar:?]
        at clojure.core$deliver.invokeStatic(core.clj:7200) [clojure-1.11.1.jar:?]
        at clojure.core$deliver.invoke(core.clj:7195) [clojure-1.11.1.jar:?]
        at rpl.rama.util.watchable_promise$loop_helper$fn__58346.invoke(watchable_promise.clj:705) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invokeStatic(watchable_promise.clj:97) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invoke(watchable_promise.clj:94) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240$fn__58241$invoke_watch_ev__58242.invoke(watchable_promise.clj:195) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at rpl.rama.util.exec_serv$wrap_runnable_with_log_and_swallow_throwables$fn__50476.invoke(exec_serv.clj:84) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) [?:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
        at rpl.rama.util.exec_serv$direct_executor$submit50581_impl__50607.invoke(exec_serv.clj:412) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv.FastDirectExecutor.submit(Unknown Source) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$task_decorating_executor_service$reify__50497.submit(exec_serv.clj:220) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$unsafe_submit.invokeStatic(exec_serv.clj:114) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$unsafe_submit.invoke(exec_serv.clj:106) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240$fn__58241.invoke(watchable_promise.clj:193) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240.invoke(watchable_promise.clj:192) [rama-0.9.0.jar:?]
        at clojure.lang.PersistentVector.reduce(PersistentVector.java:343) [clojure-1.11.1.jar:?]
        at clojure.core$reduce.invokeStatic(core.clj:6885) [clojure-1.11.1.jar:?]
        at clojure.core$reduce.invoke(core.clj:6868) [clojure-1.11.1.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237.invoke(watchable_promise.clj:190) [rama-0.9.0.jar:?]
        at clojure.core$deliver.invokeStatic(core.clj:7200) [clojure-1.11.1.jar:?]
        at clojure.core$deliver.invoke(core.clj:7195) [clojure-1.11.1.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to$fn__58266.invoke(watchable_promise.clj:335) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$delivered_promise$reify__58256.add_delivery_watcher(watchable_promise.clj:266) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to.invokeStatic(watchable_promise.clj:327) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to.invoke(watchable_promise.clj:321) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$fn_promise_always$fn__58271$fn__58272$fn__58274.invoke(watchable_promise.clj:372) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$fn_promise_always$fn__58271$fn__58272.invoke(watchable_promise.clj:362) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invokeStatic(watchable_promise.clj:97) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invoke(watchable_promise.clj:94) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240$fn__58241$invoke_watch_ev__58242.invoke(watchable_promise.clj:195) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at rpl.rama.util.exec_serv$wrap_runnable_with_log_and_swallow_throwables$fn__50476.invoke(exec_serv.clj:84) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) [?:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
        at rpl.rama.util.exec_serv$direct_executor$submit50581_impl__50607.invoke(exec_serv.clj:412) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv.FastDirectExecutor.submit(Unknown Source) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$task_decorating_executor_service$reify__50497.submit(exec_serv.clj:220) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$unsafe_submit.invokeStatic(exec_serv.clj:114) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$unsafe_submit.invoke(exec_serv.clj:106) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240$fn__58241.invoke(watchable_promise.clj:193) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240.invoke(watchable_promise.clj:192) [rama-0.9.0.jar:?]
        at clojure.lang.PersistentVector.reduce(PersistentVector.java:343) [clojure-1.11.1.jar:?]
        at clojure.core$reduce.invokeStatic(core.clj:6885) [clojure-1.11.1.jar:?]
        at clojure.core$reduce.invoke(core.clj:6868) [clojure-1.11.1.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237.invoke(watchable_promise.clj:190) [rama-0.9.0.jar:?]
        at clojure.core$deliver.invokeStatic(core.clj:7200) [clojure-1.11.1.jar:?]
        at clojure.core$deliver.invoke(core.clj:7195) [clojure-1.11.1.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to$fn__58266.invoke(watchable_promise.clj:335) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$delivered_promise$reify__58256.add_delivery_watcher(watchable_promise.clj:266) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to.invokeStatic(watchable_promise.clj:327) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to.invoke(watchable_promise.clj:321) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$fn_promise_always$fn__58271$fn__58272$fn__58274.invoke(watchable_promise.clj:372) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$fn_promise_always$fn__58271$fn__58272.invoke(watchable_promise.clj:362) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invokeStatic(watchable_promise.clj:97) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invoke(watchable_promise.clj:94) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240$fn__58241$invoke_watch_ev__58242.invoke(watchable_promise.clj:195) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at rpl.rama.util.exec_serv$wrap_runnable_with_log_and_swallow_throwables$fn__50476.invoke(exec_serv.clj:84) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) [?:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
        at rpl.rama.util.exec_serv$direct_executor$submit50581_impl__50607.invoke(exec_serv.clj:412) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv.FastDirectExecutor.submit(Unknown Source) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$task_decorating_executor_service$reify__50497.submit(exec_serv.clj:220) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$unsafe_submit.invokeStatic(exec_serv.clj:114) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$unsafe_submit.invoke(exec_serv.clj:106) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240$fn__58241.invoke(watchable_promise.clj:193) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240.invoke(watchable_promise.clj:192) [rama-0.9.0.jar:?]
        at clojure.lang.PersistentVector.reduce(PersistentVector.java:343) [clojure-1.11.1.jar:?]
        at clojure.core$reduce.invokeStatic(core.clj:6885) [clojure-1.11.1.jar:?]
        at clojure.core$reduce.invoke(core.clj:6868) [clojure-1.11.1.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237.invoke(watchable_promise.clj:190) [rama-0.9.0.jar:?]
        at clojure.core$deliver.invokeStatic(core.clj:7200) [clojure-1.11.1.jar:?]
        at clojure.core$deliver.invoke(core.clj:7195) [clojure-1.11.1.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to$fn__58266.invoke(watchable_promise.clj:335) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$delivered_promise$reify__58256.add_delivery_watcher(watchable_promise.clj:266) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to.invokeStatic(watchable_promise.clj:327) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to.invoke(watchable_promise.clj:321) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$fn_promise_always$fn__58271$fn__58272$fn__58274.invoke(watchable_promise.clj:372) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$fn_promise_always$fn__58271$fn__58272.invoke(watchable_promise.clj:362) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invokeStatic(watchable_promise.clj:97) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invoke(watchable_promise.clj:94) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240$fn__58241$invoke_watch_ev__58242.invoke(watchable_promise.clj:195) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at rpl.rama.util.exec_serv$wrap_runnable_with_log_and_swallow_throwables$fn__50476.invoke(exec_serv.clj:84) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) [?:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
        at rpl.rama.util.exec_serv$direct_executor$submit50581_impl__50607.invoke(exec_serv.clj:412) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv.FastDirectExecutor.submit(Unknown Source) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$task_decorating_executor_service$reify__50497.submit(exec_serv.clj:220) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$unsafe_submit.invokeStatic(exec_serv.clj:114) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$unsafe_submit.invoke(exec_serv.clj:106) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240$fn__58241.invoke(watchable_promise.clj:193) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240.invoke(watchable_promise.clj:192) [rama-0.9.0.jar:?]
        at clojure.lang.PersistentVector.reduce(PersistentVector.java:343) [clojure-1.11.1.jar:?]
        at clojure.core$reduce.invokeStatic(core.clj:6885) [clojure-1.11.1.jar:?]
        at clojure.core$reduce.invoke(core.clj:6868) [clojure-1.11.1.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237.invoke(watchable_promise.clj:190) [rama-0.9.0.jar:?]
        at clojure.core$deliver.invokeStatic(core.clj:7200) [clojure-1.11.1.jar:?]
        at clojure.core$deliver.invoke(core.clj:7195) [clojure-1.11.1.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to$fn__58266.invoke(watchable_promise.clj:335) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$delivered_promise$reify__58256.add_delivery_watcher(watchable_promise.clj:266) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to.invokeStatic(watchable_promise.clj:327) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to.invoke(watchable_promise.clj:321) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$fn_promise_always$fn__58271$fn__58272$fn__58274.invoke(watchable_promise.clj:372) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$fn_promise_always$fn__58271$fn__58272.invoke(watchable_promise.clj:362) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invokeStatic(watchable_promise.clj:97) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invoke(watchable_promise.clj:94) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240$fn__58241$invoke_watch_ev__58242.invoke(watchable_promise.clj:195) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at rpl.rama.util.exec_serv$wrap_runnable_with_log_and_swallow_throwables$fn__50476.invoke(exec_serv.clj:84) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) [?:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
        at rpl.rama.util.exec_serv$direct_executor$submit50581_impl__50607.invoke(exec_serv.clj:412) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv.FastDirectExecutor.submit(Unknown Source) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$task_decorating_executor_service$reify__50497.submit(exec_serv.clj:220) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$unsafe_submit.invokeStatic(exec_serv.clj:114) [rama-0.9.0.jar:?]
        at rpl.rama.util.exec_serv$unsafe_submit.invoke(exec_serv.clj:106) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240$fn__58241.invoke(watchable_promise.clj:193) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$body_fn__22065__auto____58240.invoke(watchable_promise.clj:192) [rama-0.9.0.jar:?]
        at clojure.lang.PersistentVector.reduce(PersistentVector.java:343) [clojure-1.11.1.jar:?]
        at clojure.core$reduce.invokeStatic(core.clj:6885) [clojure-1.11.1.jar:?]
        at clojure.core$reduce.invoke(core.clj:6868) [clojure-1.11.1.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237.invoke(watchable_promise.clj:190) [rama-0.9.0.jar:?]
        at clojure.core$deliver.invokeStatic(core.clj:7200) [clojure-1.11.1.jar:?]
        at clojure.core$deliver.invoke(core.clj:7195) [clojure-1.11.1.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to$fn__58266.invoke(watchable_promise.clj:335) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$delivered_promise$reify__58256.add_delivery_watcher(watchable_promise.clj:266) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to.invokeStatic(watchable_promise.clj:327) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$deliver_to.invoke(watchable_promise.clj:321) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$promise_if_STAR_$fn__58300$fn__58302.invoke(watchable_promise.clj:494) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$promise_if_STAR_$fn__58300.invoke(watchable_promise.clj:487) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invokeStatic(watchable_promise.clj:97) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$invoke_watcher_BANG_.invoke(watchable_promise.clj:94) [rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$watchable_promise$reify__58237$invoke_watch_ev__58249.invoke(watchable_promise.clj:238) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at rpl.rama.util.exec_serv$wrap_runnable_with_log_and_swallow_throwables$fn__50476.invoke(exec_serv.clj:84) [rama-0.9.0.jar:?]
        at clojure.lang.AFn.run(AFn.java:22) [clojure-1.11.1.jar:?]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) [?:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) [?:?]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) [?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) [?:?]
        at java.lang.Thread.run(Thread.java:833) [?:?]
Caused by: clojure.lang.ExceptionInfo: unexpected Throwable while performing async action on component!
        at rpl.rama.distributed.util.rama_component.core$update_component$if_fn__58312__auto____69729.invoke(core.clj:480) ~[rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$promise_if_STAR_$fn__58300$fn__58302.invoke(watchable_promise.clj:491) ~[rama-0.9.0.jar:?]
        ... 13 more
Caused by: java.lang.IllegalArgumentException: Path must start with / character
        at org.apache.curator.utils.PathUtils.validatePath(PathUtils.java:54) ~[curator-client-5.3.0.jar:?]
        at org.apache.curator.utils.PathUtils.validatePath(PathUtils.java:37) ~[curator-client-5.3.0.jar:?]
        at org.apache.curator.utils.ZKPaths.fixForNamespace(ZKPaths.java:107) ~[curator-client-5.3.0.jar:?]
        at org.apache.curator.framework.imps.NamespaceImpl.fixForNamespace(NamespaceImpl.java:104) ~[curator-framework-5.3.0.jar:5.3.0]
        at org.apache.curator.framework.imps.CuratorFrameworkImpl.fixForNamespace(CuratorFrameworkImpl.java:753) ~[curator-framework-5.3.0.jar:5.3.0]
        at org.apache.curator.framework.imps.ExistsBuilderImpl.forPath(ExistsBuilderImpl.java:187) ~[curator-framework-5.3.0.jar:5.3.0]
        at org.apache.curator.framework.imps.ExistsBuilderImpl.forPath(ExistsBuilderImpl.java:35) ~[curator-framework-5.3.0.jar:5.3.0]
        at rpl.rama.distributed.util.zookeeper.real_zookeeper_client.RealZookeeperClient._exists_node_QMARK_(real_zookeeper_client.clj:575) ~[rama-0.9.0.jar:?]
        at rpl.rama.distributed.util.zookeeper.zookeeper_client$exists_node_QMARK_.invokeStatic(zookeeper_client.clj:64) ~[rama-0.9.0.jar:?]
        at rpl.rama.distributed.util.zookeeper.zookeeper_client$exists_node_QMARK_.doInvoke(zookeeper_client.clj:55) ~[rama-0.9.0.jar:?]
        at clojure.lang.RestFn.invoke(RestFn.java:425) ~[clojure-1.11.1.jar:?]
        at rpl.rama.distributed.util.zookeeper.real_zookeeper_client$wait_for$fn__304443.invoke(real_zookeeper_client.clj:497) ~[rama-0.9.0.jar:?]
        at rpl.rama.distributed.util.zookeeper.real_zookeeper_client$wait_for.invokeStatic(real_zookeeper_client.clj:496) ~[rama-0.9.0.jar:?]
        at rpl.rama.distributed.util.zookeeper.real_zookeeper_client$wait_for.invoke(real_zookeeper_client.clj:489) ~[rama-0.9.0.jar:?]
        at rpl.rama.distributed.util.zookeeper.real_zookeeper_client.RealZookeeperClient$fn__304553$fn__304557.invoke(real_zookeeper_client.clj:524) ~[rama-0.9.0.jar:?]
        at rpl.rama.distributed.util.zookeeper.real_zookeeper_client.RealZookeeperClient$fn__304553.invoke(real_zookeeper_client.clj:522) ~[rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$fn_promise$fn__58287.invoke(watchable_promise.clj:395) ~[rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$fn_promise_always.invokeStatic(watchable_promise.clj:352) ~[rama-0.9.0.jar:?]        at rpl.rama.util.watchable_promise$fn_promise_always.invoke(watchable_promise.clj:346) ~[rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$fn_promise.invokeStatic(watchable_promise.clj:392) ~[rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$fn_promise.invoke(watchable_promise.clj:376) ~[rama-0.9.0.jar:?]
        at rpl.rama.distributed.util.zookeeper.real_zookeeper_client.RealZookeeperClient.start_async(real_zookeeper_client.clj:522) ~[rama-0.9.0.jar:?]
        at rpl.rama.distributed.util.rama_component.core$start_async.invokeStatic(core.clj:60) ~[rama-0.9.0.jar:?]
        at rpl.rama.distributed.util.rama_component.core$start_async.invoke(core.clj:57) ~[rama-0.9.0.jar:?]
        at rpl.rama.distributed.util.rama_component.core$update_component$fn__69726.invoke(core.clj:470) ~[rama-0.9.0.jar:?]
        at rpl.rama.distributed.util.rama_component.core$update_component.invokeStatic(core.clj:462) ~[rama-0.9.0.jar:?]        at rpl.rama.distributed.util.rama_component.core$update_component.invoke(core.clj:456) ~[rama-0.9.0.jar:?]
        at rpl.rama.distributed.util.rama_component.core$update_system_async_STAR_$loop_body_fn__58353__auto____69738$fn__69781.invoke(core.clj:512) ~[rama-0.9.0.jar:?]
        at rpl.rama.distributed.util.rama_component.core$update_system_async_STAR_$loop_body_fn__58353__auto____69738.invoke(core.clj:511) ~[rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$loop_helper$fn__58346$fn__58347.invoke(watchable_promise.clj:688) ~[rama-0.9.0.jar:?]
        at rpl.rama.util.watchable_promise$loop_helper$fn__58346.invoke(watchable_promise.clj:688) ~[rama-0.9.0.jar:?]
        ... 147 more
ERROR clojure.lang.ExceptionInfo:
System map startup failed; cleanup complete
        at rpl.rama.util.exception$fn__21097.invokeStatic (exception.clj:99)
ERROR java.lang.IllegalArgumentException:
Error when handling error: System map startup failed; cleanup complete
        at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0 (Native Method)
FATAL: groovy.lang.MissingMethodException: No signature of method: java.lang.StringBuilder.setLength() is applicable for argument types: (Integer) values: [0]
groovy.lang.MissingMethodException: No signature of method: java.lang.StringBuilder.setLength() is applicable for argument types: (Integer) values: [0]
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:70)
        at org.codehaus.groovy.runtime.callsite.PojoMetaClassSite.call(PojoMetaClassSite.java:46)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:139)
        at org.codehaus.groovy.tools.shell.Groovysh$_closure2.doCall(Groovysh.groovy:535)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:107)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323)
        at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:274)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1035)
        at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:38)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:139)
        at org.codehaus.groovy.tools.shell.Groovysh.displayError(Groovysh.groovy:563)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:107)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1268)
        at groovy.lang.MetaClassImpl.invokeMethodClosure(MetaClassImpl.java:1048)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1142)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1035)
        at org.codehaus.groovy.runtime.InvokerHelper.invokePogoMethod(InvokerHelper.java:1029)
        at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:1012)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(ScriptBytecodeAdapter.java:180)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeClosure(ScriptBytecodeAdapter.java:586)
        at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:70)
        at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$run(InteractiveShellRunner.groovy)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:107)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1268)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:144)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:164)
        at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:99)
        at java_lang_Runnable$run.call(Unknown Source)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:130)
        at org.codehaus.groovy.tools.shell.Groovysh.run(Groovysh.groovy:613)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at org.codehaus.gmavenplus.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:212)
        at org.codehaus.gmavenplus.mojo.ShellMojo.execute(ShellMojo.java:107)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:126)
        at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2(MojoExecutor.java:328)
        at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute(MojoExecutor.java:316)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:174)
        at org.apache.maven.lifecycle.internal.MojoExecutor.access$000(MojoExecutor.java:75)
        at org.apache.maven.lifecycle.internal.MojoExecutor$1.run(MojoExecutor.java:162)
        at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute(DefaultMojosExecutionStrategy.java:39)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:159)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:105)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:73)
        at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:53)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:118)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:261)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:173)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:101)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:906)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:283)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:206)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:283)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:226)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:407)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:348)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  30.737 s
[INFO] Finished at: 2023-08-23
[INFO] ------------------------------------------------------------------------

Java info

PS C:\src\rama-examples> java --version
java 17.0.5 2022-10-18 LTS
Java(TM) SE Runtime Environment (build 17.0.5+9-LTS-191)
Java HotSpot(TM) 64-Bit Server VM (build 17.0.5+9-LTS-191, mixed mode, sharing)

thanks

Error running Groovy REPL

I am attempting the Rama tutorial and after cloning the repo and running mvn compile successfully, I have attempted to run a Groovy REPL with:

$ mvn gplus:shell

but receive the following error:

[INFO] Scanning for projects...
[INFO] 
[INFO] -----------------------< com.rpl:rama-examples >------------------------
[INFO] Building rama-examples 1.0.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- gmavenplus-plugin:1.13.1:shell (default-cli) @ rama-examples ---
[INFO] Using isolated classloader, without GMavenPlus classpath.
[INFO] Using Groovy 3.0.9 to perform shell.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  1.050 s
[INFO] Finished at: 2023-08-24T19:05:04-04:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.gmavenplus:gmavenplus-plugin:1.13.1:shell (default-cli) on project rama-examples: Error occurred while calling a method on a Groovy class from classpath.: InvocationTargetException: BUG! exception in phase 'semantic analysis' in source unit 'Script1.groovy' Unsupported class file major version 63 -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

Please let me know if any additional information would be useful.

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