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<scxml>
<!-- invoke and communicate on entry - will fail -->
<state id="send.onentry">
<invoke type="scxml"
id="send.onentry.invoker"
src="test-invoke-communication-invoker.scxml" />
<onentry>
<!-- This will fail as invoker is not yet instantiated -->
<send target="#_send.onentry.invoker"
event="finish"/>
</onentry>
<transition event="done.invoke.send.onentry.invoker"
target="send.onentry.pass" />
<transition event="error.communication"
target="send.onentry.fail" />
</state>
<state id="send.onentry.pass">
<transition target="external.event" />
</state>
<state id="send.onentry.fail">
<transition target="external.event" />
</state>
<!-- Invoke and send an event to the external queue which will trigger communication -->
<state id="external.event">
<invoke type="scxml"
id="external.event.invoker"
src="test-invoke-communication-invoker.scxml" />
<onentry>
<send event="send.to.invoker"/>
</onentry>
<transition type="internal"
event="send.to.invoker">
<!-- This will succeed as invoker was instantiated -->
<send target="#_external.event.invoker"
event="finish"/>
</transition>
<transition event="done.invoke.external.event.invoker"
target="external.event.pass" />
<transition event="error.communication"
target="external.event.fail" />
</state>
<state id="external.event.pass">
<transition target="delayed.event" />
</state>
<state id="external.event.fail">
<transition target="delayed.event" />
</state>
<!-- invoke and communicate delayed on entry - will succeed -->
<state id="delayed.event">
<invoke type="scxml"
id="delayed.event.invoker"
src="test-invoke-communication-invoker.scxml" />
<onentry>
<!-- This will succeed as the invoker will be instantiated in 1ms (invoking is synchronous) -->
<send target="#_delayed.event.invoker"
event="finish"
delay="1ms"/>
</onentry>
<transition event="done.invoke.delayed.event.invoker"
target="delayed.event.pass" />
<transition event="error.communication"
target="delayed.event.fail" />
</state>
<state id="delayed.event.pass">
<transition target="callback.event" />
</state>
<state id="delayed.event.fail">
<transition target="callback.event" />
</state>
<!-- invoke with callback event (out of spec, but so useful!) -->
<state id="callback.event">
<invoke type="scxml"
id="callback.event.invoker"
callback="init"
src="test-invoke-communication-invoker.scxml" />
<transition event="init.callback.event.invoker">
<send target="#_callback.event.invoker"
event="finish" />
</transition>
<transition event="done.invoke.callback.event.invoker"
target="callback.event.pass" />
<transition event="error.communication"
target="callback.event.fail" />
</state>
<final id="callback.event.pass" />
<final id="callback.event.fail" />
</scxml>
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