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Component Hot Reloading #3910

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Jan 11, 2024
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Component Hot Reloading #3910

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Component Hot Reloading
JoshVanL Dec 19, 2023
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Merge branch 'v1.13' into preview-feature-component-hot-reloading
msfussell Jan 6, 2024
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JoshVanL Jan 9, 2024
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Update daprdocs/content/en/concepts/components-concept.md
JoshVanL Jan 9, 2024
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Update compoents-updates.md with hot reloading feature
JoshVanL Jan 9, 2024
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JoshVanL Jan 11, 2024
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Update daprdocs/content/en/operations/components/component-updates.md
JoshVanL Jan 11, 2024
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8 changes: 8 additions & 0 deletions daprdocs/content/en/concepts/components-concept.md
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Expand Up @@ -52,6 +52,14 @@ For example:

For more information read [Pluggable components overview]({{< ref "pluggable-components-overview" >}})

## Hot Reloading

With the [`HotReload` feature enabled]({{< ref "support-preview-features.md" >}}), Components are able to be "hot reloaded" at runtime.
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This means that you can update component configuration without restarting the Dapr runtime.
Component reloading happens when a Component resource is created, updated, or deleted, either in the Kubernetes API or in Self Hosted mode when a file is changed in the `resources` directory.
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When a component is updated, the Component is first closed, and then reinitialized using the new configuration.
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There will be a short period of time where the component is unavailable during the duration of the reload until the component is reinitialized.
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## Available component types

The following are the component types provided by Dapr:
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2 changes: 1 addition & 1 deletion daprdocs/content/en/operations/support/support-preview-features.md
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Expand Up @@ -22,4 +22,4 @@ For CLI there is no explicit opt-in, just the version that this was first made a
| **Service invocation for non-Dapr endpoints** | Allow the invocation of non-Dapr endpoints by Dapr using the [Service invocation API]({{< ref service_invocation_api.md >}}). Read ["How-To: Invoke Non-Dapr Endpoints using HTTP"]({{< ref howto-invoke-non-dapr-endpoints.md >}}) for more information. | N/A | [Service invocation API]({{< ref service_invocation_api.md >}}) | v1.11 |
| **Actor State TTL** | Allow actors to save records to state stores with Time To Live (TTL) set to automatically clean up old data. In its current implementation, actor state with TTL may not be reflected correctly by clients, read [Actor State Transactions]({{< ref actors_api.md >}}) for more information. | `ActorStateTTL` | [Actor State Transactions]({{< ref actors_api.md >}}) | v1.11 |
| **Transactional Outbox** | Allows state operations for inserts and updates to be published to a configured pub/sub topic using a single transaction across the state store and the pub/sub | N/A | [Transactional Outbox Feature]({{< ref howto-outbox.md >}}) | v1.12 |

| ** Component Hot Reloading** | Allows for dapr loaded Components to be "hot reloaded". A Component spec will be reloaded when it is created/updated/deleted in Kubernetes or on file when running in Self Hosted mode.| N/A | [Hot Reloading]({{< ref components-concept.md >}}) | v1.13 |
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