# Signalling system - Human driven workflows

**URL:** <https://community.temporal.io/t/signalling-system-human-driven-workflows/160>\
**Category:** Community Support\
**Tags:** use-case-validation, signals\
**Created:** [July 13, 2020, 7:15pm UTC](https://community.temporal.io/t/signalling-system-human-driven-workflows/160 "2020-07-13T19:15:44Z")\
**Posts on this page:** 1\
**Showing post:** 14

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**Author:** ![maxim](https://sea2.discourse-cdn.com/flex016/user_avatar/community.temporal.io/maxim/32/8_2.png) [@maxim](https://community.temporal.io/u/maxim)\
**Post date:** [November 29, 2020, 8:39pm UTC](https://community.temporal.io/t/signalling-system-human-driven-workflows/160/14 "2020-11-29T20:39:46Z")

</div>

I cannot compile the code you posted as it misses some dependencies:

```bash
Starting a Gradle Daemon, 1 incompatible Daemon could not be reused, use --status for details

> Configure project :lib
e: /Users/maxim/support/dynamic.fg/lib/build.gradle.kts:11:5: Unresolved reference: toolchain
e: /Users/maxim/support/dynamic.fg/lib/build.gradle.kts:12:9: Unresolved reference: languageVersion
e: /Users/maxim/support/dynamic.fg/lib/build.gradle.kts:12:29: Unresolved reference: JavaLanguageVersion

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/maxim/support/dynamic.fg/lib/build.gradle.kts' line: 11

* What went wrong:
Script compilation errors:

  Line 11: toolchain {
               ^ Unresolved reference: toolchain

  Line 12: languageVersion.set(JavaLanguageVersion.of(11))
                   ^ Unresolved reference: languageVersion

  Line 12: languageVersion.set(JavaLanguageVersion.of(11))
                                       ^ Unresolved reference: JavaLanguageVersion

3 errors

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

```

But looking at the workflow code I see that it processes state transitions from the signal method. My guess is that these state transitions evolve some blocking operations. When the signal method is blocked other signals will be delivered. See [this issue](https://community.temporal.io/t/synchronizing-signal-method-executions/642) for the proposed solution. [Here is](https://community.temporal.io/t/can-signal-trigger-activity-and-keep-strict-order/1060/6) another one.

I agree that the current design is not ideal. I’m not sure if we can change it in a backward-compatible way.

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_[View the full topic](https://community.temporal.io/t/signalling-system-human-driven-workflows/160)._