Many-to-One and Many-to-Many Communication
Start listening on a channel for many-to-one communication.
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listener = ChannelListen["master"]
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Send messages to the channel from several sessions—for instance, from parallel kernels on the same machine.
In[2]:=

ParallelEvaluate[ChannelSend["master", $KernelID]]
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The received messages.
In[3]:=

listener["Message", All]
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A diagram of the message exchange.
show complete Wolfram Language input
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Start listening on the same channel in multiple parallel kernel sessions.
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ParallelEvaluate[l = ChannelListen["all"]]
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Let all the parallel kernels send their respective IDs to the channel.
In[7]:=

ParallelEvaluate[ChannelSend["all", $KernelID]]
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Messages received by the listeners, with their respective kernel IDs.
In[8]:=

ParallelEvaluate[$KernelID -> l["Message", All]]
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A diagram of the exchange.
show complete Wolfram Language input
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