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<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title>Answers to: Signal wildcards behave in an unexpected way</title><link>https://answers.axonivy.com/questions/3797/signal-wildcards-behave-in-an-unexpected-way</link><description>&lt;p&gt;Hi Axon.ivy Team,&lt;/p&gt;
&lt;p&gt;I'm using Axon.ivy LTS 7.0.8 and I'm getting an issue related to &lt;code&gt;Signal&lt;/code&gt;.&lt;/p&gt;
&lt;p&gt;I have 4 signal receivers:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;&lt;code&gt;one&lt;/code&gt;&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;&lt;code&gt;one:two&lt;/code&gt;&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;&lt;code&gt;one:two:three&lt;/code&gt;&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;&lt;code&gt;one:two:three:four&lt;/code&gt;&lt;/p&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;p&gt;When I send the signal &lt;code&gt;one:two:three:four&lt;/code&gt;,  I expect that only the (4) receiver would be triggered. Unfortunately, I was  surprised that &lt;strong&gt;all&lt;/strong&gt; four of them were triggered.&lt;/p&gt;
&lt;p&gt;&lt;img alt="all four signal receivers are triggered" src="https://answers.axonivy.com/upfiles/image_(3).png"&gt;&lt;/p&gt;
&lt;p&gt;According to the official document, I would expect that only if I use the wildcard in the pattern of the Receiver, I will have the same behaviours (&lt;code&gt;one:*&lt;/code&gt;, &lt;code&gt;one:two:*&lt;/code&gt;, &lt;code&gt;one:two:three:*&lt;/code&gt;) but in this case, the wildcard does not matter much here.&lt;/p&gt;
&lt;p&gt;Is it a bug or by design that the Signal Receivers behave like that?&lt;/p&gt;
&lt;p&gt;Thanks!
Jack&lt;/p&gt;</description><atom:link href="https://answers.axonivy.com/questions/3797/signal-wildcards-behave-in-an-unexpected-way" rel="self"></atom:link><language>en</language><lastBuildDate>Wed, 15 May 2019 09:44:43 -0400</lastBuildDate><item><title>Answer by Reguel Wermelinger</title><link>https://answers.axonivy.com/questions/3797/signal-wildcards-behave-in-an-unexpected-way/3798</link><description>&lt;p&gt;Hi Jack&lt;/p&gt;
&lt;p&gt;that the signals are fired here is expected. Signal codes are hierarchical and can be used pretty much like package names in java.
the idea is that one fires &lt;code&gt;acme:cool:wf:customer:signed:up:3424&lt;/code&gt;
and starts can listen to this signals by using a parent code: e.g. &lt;code&gt;acme&lt;/code&gt;, &lt;code&gt;acme:cool&lt;/code&gt;, &lt;code&gt;acme:cool:wf&lt;/code&gt;, &lt;code&gt;acme:cool:wf:customer&lt;/code&gt;, &lt;code&gt;acme:cool:wf:customer:signed&lt;/code&gt;, &lt;code&gt;acme:cool:wf:customer:signed:up&lt;/code&gt;
the wildcard at the end is not necessary. But it is required if a listener should react to wildcards on the left side of the code:
&lt;code&gt;*:cool:wf:customer&lt;/code&gt; is a valid example of a wildcard.&lt;/p&gt;
&lt;p&gt;But I see 2 problems exposed by your question:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;signal wildcards are currently documented in a misleading way in the designer guide. So I'll try to clarify this chapter.&lt;/li&gt;
&lt;li&gt;and we allow to inscribe patterns such as &lt;code&gt;acme:*&lt;/code&gt; but at runtime these starts are not fired. That's a bug in my opinion. Not important as you can easily skip the wildcard and have the result you'd expect. But I'll address it in XIVY-3220.&lt;/li&gt;
&lt;/ul&gt;</description><dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Reguel Wermelinger</dc:creator><pubDate>Wed, 15 May 2019 09:44:43 -0400</pubDate><guid>https://answers.axonivy.com/questions/3797/signal-wildcards-behave-in-an-unexpected-way/3798</guid></item></channel></rss>