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11 lines
789 B
Markdown
11 lines
789 B
Markdown
# Receiving Messages
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In general, applications can receive messages asynchronously or synchronously. Receiving messages with NATS can be library dependent.
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Some languages, like Go or Java, provide synchronous and asynchronous APIs, while others may only support one type of subscription.
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In all cases, the process of subscribing involves having the client library tell the NATS system that an application is interested in a particular subject. When an application is done with a subscription it unsubscribes telling the server to stop sending messages.
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A client will receive a message for each matching subscription, so if a connection has multiple subscriptions using identical or overlapping subjects \(say `foo` and `>`\) the same message will be sent to the client multiple times.
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