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Signed-off-by: Derek Collison <derek@nats.io>
This commit is contained in:
Derek Collison
2019-06-06 15:42:25 -07:00
parent d7c6b1ebcf
commit 99da6d13d0
20 changed files with 180 additions and 271 deletions
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20
developer/tutorials/pubsub.md
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@@ -1,6 +1,6 @@
# Explore NATS Pub/Sub
NATS is a publish subscribe messaging system. Subscribers listening on a subject name receive messages on that subject. If the subscriber is not actively listening on the subject, the message is not received. Subscribers can use the wildcard subjects `*` to match a single token to match the tail of a subject.
NATS is a publish subscribe messaging system. Subscribers listening on a subject receive messages on that subject. If the subscriber is not actively listening on the subject, the message is not received. Subscribers can use the wildcard tokens such as `*` and `>` to match a single token or to match the tail of a subject.
<div class="graphviz"><code data-viz="dot">
digraph nats_pub_sub {
@@ -9,13 +9,13 @@ digraph nats_pub_sub {
sub1 [shape="box", label="SUB\ncom.msg.one"];
pub1 [shape="box", label="PUB\ncom.msg.one"];
non_active [shape="box", label="Non-Active\nSubscriber"];
{
rank=same
pub1 sub1 non_active
}
gnatsd [shape="box", label="NATS", width=8];
nats-server [shape="box", label="NATS", width=8];
sub2 [shape="box", label="SUB\ncom.msg.one"];
sub3 [shape="box", label="SUB\ncom.msg.two"];
@@ -26,19 +26,19 @@ digraph nats_pub_sub {
sub2 sub3 sub4
}
pub1 -> gnatsd [penwidth=2];
gnatsd -> sub1 [penwidth=2];
gnatsd -> non_active [style=dashed color=red arrowhead="none"];
pub1 -> nats-server [penwidth=2];
nats-server -> sub1 [penwidth=2];
nats-server -> non_active [style=dashed color=red arrowhead="none"];
gnatsd -> sub2 [penwidth=2];
gnatsd -> sub3 [style=dashed color=red arrowhead="none"];
gnatsd -> sub4 [penwidth=2];
nats-server -> sub2 [penwidth=2];
nats-server -> sub3 [style=dashed color=red arrowhead="none"];
nats-server -> sub4 [penwidth=2];
}
</code></div>
## Prerequisites
Go and the NATS server should be installed.
Go and the NATS server should be installed. optionally you can use the demo server located at `nats://demo.nats.io`
### 1. Start the NATS server