Unable to select custom launcher with the new CLI

[kelvin-olaiya]

I was trying to run Alchemist in server mode with the following configuration file:

incarnation: protelis
launcher:
  type: AlchemistServer

(here AlchemistServer refers to IgniteServerLauncher).

The problem is that it launches with the HeadlessSimulationLauncher which I understand is the default.

Here's the output

14:52:34.299 [alchemist-executor-0] WARN it.unibo.alchemist.boundary.loader.SimulationModel -- No seeds specified, defaulting to 0 for both scenario and simulation
LOGBACK: No context given for ch.qos.logback.core.ConsoleAppender[null]
14:52:34.322 [alchemist-executor-0] WARN it.unibo.alchemist.boundary.loader.SimulationModel -- No environment specified, defaulting to Continuous2DEnvironment
14:52:34.341 [alchemist-executor-0] WARN it.unibo.alchemist.boundary.loader.SimulationModel -- There are no displacements in the specification, the environment won't have any node

[DanySK]

Can you run it in verbose mode?

[kelvin-olaiya]

Sure,
here's the output

16:02:52.025 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Visiting: {} searching for Constant
LOGBACK: No context given for ch.qos.logback.core.ConsoleAppender[null]
16:02:52.039 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over incarnation
16:02:52.039 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over protelis
16:02:52.039 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over launcher
16:02:52.040 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over type
16:02:52.040 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over AlchemistServer
16:02:52.040 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- New model: {incarnation=protelis, launcher={type=AlchemistServer}}
16:02:52.040 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- 0 constants: {}
16:02:52.040 [main] INFO it.unibo.alchemist.boundary.loader.SimulationModel -- 0 constants: {}
16:02:52.041 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Visiting: null searching for DependentVariable
16:02:52.041 [main] INFO it.unibo.alchemist.boundary.loader.SimulationModel -- Dependent variables: {}
16:02:52.041 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over incarnation
16:02:52.041 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over protelis
16:02:52.041 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over launcher
16:02:52.041 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over type
16:02:52.041 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over AlchemistServer
16:02:52.041 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- New model: {incarnation=protelis, launcher={type=AlchemistServer}}
16:02:52.042 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Visiting: null searching for Variable
16:02:52.042 [main] INFO it.unibo.alchemist.boundary.loader.SimulationModel -- Variables: {}
16:02:52.307 [main] DEBUG it.unibo.alchemist.boundary.loader.util.JVMConstructor -- Building a HeadlessSimulationLauncher with []
16:02:52.373 [main] INFO it.unibo.alchemist.boundary.loader.util.JVMConstructor -- Constructor HeadlessSimulationLauncher(int, List) failed for the following reasons: 
16:02:52.373 [main] INFO it.unibo.alchemist.boundary.loader.util.JVMConstructor --   - InstancingImpossibleException: Could not create an instance with public it.unibo.alchemist.boundary.launch.HeadlessSimulationLauncher(int,java.util.List): discarded because incompatible with provided parameters []
16:02:52.374 [main] INFO it.unibo.alchemist.boundary.loader.util.JVMConstructor -- Constructor HeadlessSimulationLauncher(int, List, int, DefaultConstructorMarker) failed for the following reasons: 
16:02:52.374 [main] INFO it.unibo.alchemist.boundary.loader.util.JVMConstructor --   - InstancingImpossibleException: Could not create an instance with public it.unibo.alchemist.boundary.launch.HeadlessSimulationLauncher(int,java.util.List,int,kotlin.jvm.internal.DefaultConstructorMarker): discarded because incompatible with provided parameters []
16:02:52.379 [main] DEBUG it.unibo.alchemist.boundary.loader.util.JVMConstructor -- Building a AlchemistServer with []
16:02:52.416 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over incarnation
16:02:52.416 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over protelis
16:02:52.416 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over launcher
16:02:52.416 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over type
16:02:52.416 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over AlchemistServer
16:02:52.416 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- New model: {incarnation=protelis, launcher={type=AlchemistServer}}
16:02:52.417 [main] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Trying to build a String from {} (syntax: null)
16:02:52.417 [main] INFO it.unibo.alchemist.boundary.loader.SimulationModel -- Remote dependencies: []
16:02:52.427 [alchemist-executor-0] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Known values: {}
16:02:52.427 [alchemist-executor-0] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over incarnation
16:02:52.427 [alchemist-executor-0] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over protelis
16:02:52.427 [alchemist-executor-0] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over launcher
16:02:52.428 [alchemist-executor-0] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over type
16:02:52.428 [alchemist-executor-0] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Could not replace nor iterate over AlchemistServer
16:02:52.428 [alchemist-executor-0] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- New model: {incarnation=protelis, launcher={type=AlchemistServer}}
16:02:52.428 [alchemist-executor-0] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Complete simulation model: {incarnation=protelis, launcher={type=AlchemistServer}}
16:02:52.435 [alchemist-executor-0] WARN it.unibo.alchemist.boundary.loader.SimulationModel -- No seeds specified, defaulting to 0 for both scenario and simulation
16:02:52.451 [alchemist-executor-0] WARN it.unibo.alchemist.boundary.loader.SimulationModel -- No environment specified, defaulting to Continuous2DEnvironment
16:02:52.464 [alchemist-executor-0] INFO it.unibo.alchemist.boundary.loader.SimulationModel -- Created environment: Continuous2DEnvironment
16:02:52.466 [alchemist-executor-0] DEBUG it.unibo.alchemist.boundary.loader.SimulationModel -- Trying to build a LinkingRule from {} (syntax: it.unibo.alchemist.boundary.loader.syntax.DocumentRoot$JavaType@71446e11)
16:02:52.468 [alchemist-executor-0] WARN it.unibo.alchemist.boundary.loader.SimulationModel -- There are no displacements in the specification, the environment won't have any node
16:02:52.491 [alchemist-executor-0] INFO it.unibo.alchemist.core.Engine -- No more reactions.
16:02:52.492 [alchemist-executor-0] INFO it.unibo.alchemist.boundary.launch.HeadlessSimulationLauncher -- Simulation with {} completed successfully

[DanySK]

Definitely a bug. Can you please open a PR with a test that "fails correctly"?
Thanks

[DanySK]

@kelvin-olaiya the test looks partially broken:

        java.lang.IllegalArgumentException: Illegal Alchemist specification: Could not create IgniteServerLauncher(), requested as instance of IgniteServerLauncher.
        Actual parameters: []
          - constructor: IgniteServerLauncher(String)
            failure message 1 of InstancingImpossibleException: Could not create an instance with public i.u.a.boundary.launchers.IgniteServerLauncher(String): discarded because incompatible with provided parameters []

You are missing a string parameter. Still, the system should fail and not fallback to headless silently

[kelvin-olaiya]

I see, I'll add the configuration file with another PR.

Anyway, IgniteServerLauncher expects the parameter with type String?, shouldn't the loading-system default it to null if missing?

[DanySK]

Only if the constructor is annotated with @JvmOverloads and the default is null. If desirable, leave the test as is and update the constructor instead

[kelvin-olaiya]

Since very likely I'll move away from Ignite, I'll add the config file to fix the test. I'll consider this aspect for the new implementation.
Thanks

[DanySK]

🎉 This issue has been resolved in version 28.0.0 🎉

The release is available on:

• 28.0.0
• GitHub release

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