mirror of https://github.com/dapr/docs.git
Merge branch 'v1.3' into actor_reminder_partition
This commit is contained in:
Artur Souza
GitHub
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---
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type: docs
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title: "State Time-to-Live (TTL)"
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linkTitle: "State TTL"
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weight: 500
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description: "Manage state with time-to-live."
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---
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## Introduction
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Dapr enables per state set request time-to-live (TTL). This means that applications can set time-to-live per state stored, and these states cannot be retrieved after expiration.
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Only a subset of Dapr [state store components]({{< ref supported-state-stores >}}) are compatible with state TTL. For supported state stores simply set the `ttlInSeconds` metadata when publishing a message. Other state stores will ignore this value.
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Some state stores can specify a default expiration on a per-table/container basis. Please refer to the official documentation of these state stores to utilize this feature of desired. Dapr support per-state TTLs for supported state stores.
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## Native state TTL support
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When state time-to-live has native support in the state store component, Dapr simply forwards the time-to-live configuration without adding any extra logic, keeping predictable behavior. This is helpful when the expired state is handled differently by the component.
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When a TTL is not specified the default behavior of the state store is retained.
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## Persisting state (ignoring an existing TTL)
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To explictly persist a state (ignoring any TTLs set for the key), specify a `ttlInSeconds` value of `-1`.
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## Supported components
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Please refer to the TTL column in the tables at [state store components]({{< ref supported-state-stores >}}).
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## Example
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State TTL can be set in the metadata as part of the state store set request:
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{{< tabs "HTTP API (Bash)" "HTTP API (PowerShell)" "Python SDK" "PHP SDK">}}
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{{% codetab %}}
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```bash
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curl -X POST -H "Content-Type: application/json" -d '[{ "key": "key1", "value": "value1", "metadata": { "ttlInSeconds": "120" } }]' http://localhost:3500/v1.0/state/statestore
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```
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{{% /codetab %}}
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{{% codetab %}}
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```powershell
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Invoke-RestMethod -Method Post -ContentType 'application/json' -Body '[{"key": "key1", "value": "value1", "metadata": {"ttlInSeconds": "120"}}]' -Uri 'http://localhost:3500/v1.0/state/statestore'
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```
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{{% /codetab %}}
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{{% codetab %}}
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```python
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from dapr.clients import DaprClient
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with DaprClient() as d:
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d.save_state(
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store_name="statestore",
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key="myFirstKey",
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value="myFirstValue",
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metadata=(
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('ttlInSeconds', '120')
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)
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)
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print("State has been stored")
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```
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{{% /codetab %}}
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{{% codetab %}}
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Save the following in `state-example.php`:
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```php
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<?php
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require_once __DIR__.'/vendor/autoload.php';
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$app = \Dapr\App::create();
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$app->run(function(\Dapr\State\StateManager $stateManager, \Psr\Log\LoggerInterface $logger) {
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$stateManager->save_state(store_name: 'statestore', item: new \Dapr\State\StateItem(
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key: 'myFirstKey',
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value: 'myFirstValue',
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metadata: ['ttlInSeconds' => '120']
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));
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$logger->alert('State has been stored');
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});
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```
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{{% /codetab %}}
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{{< /tabs >}}
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See [this guide]({{< ref state_api.md >}}) for a reference on the state API.
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## Related links
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- Learn [how to use key value pairs to persist a state]({{< ref howto-get-save-state.md >}})
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- List of [state store components]({{< ref supported-state-stores >}})
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- Read the [API reference]({{< ref state_api.md >}})
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@ -26,38 +26,38 @@ The following stores are supported, at various levels, by the Dapr state managem
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### Generic
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| Name | CRUD | Transactional | ETag | Actors | Status | Component version | Since |
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|----------------------------------------------------------------|------|---------------------|------|------|--------| -------|------|
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| [Aerospike]({{< ref setup-aerospike.md >}}) | ✅ | ❌ | ✅ | ❌ | Alpha | v1 | 1.0 |
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| [Apache Cassandra]({{< ref setup-cassandra.md >}}) | ✅ | ❌ | ❌ | ❌ | Alpha | v1 | 1.0 |
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| [Cloudstate]({{< ref setup-cloudstate.md >}}) | ✅ | ❌ | ✅ | ❌ | Alpha | v1 | 1.0 |
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| [Couchbase]({{< ref setup-couchbase.md >}}) | ✅ | ❌ | ✅ | ❌ | Alpha | v1 | 1.0 |
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| [Hashicorp Consul]({{< ref setup-consul.md >}}) | ✅ | ❌ | ❌ | ❌ | Alpha | v1 | 1.0 |
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| [Hazelcast]({{< ref setup-hazelcast.md >}}) | ✅ | ❌ | ❌ | ❌ | Alpha | v1 | 1.0 |
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| [Memcached]({{< ref setup-memcached.md >}}) | ✅ | ❌ | ❌ | ❌ | Alpha | v1 | 1.0 |
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| [MongoDB]({{< ref setup-mongodb.md >}}) | ✅ | ✅ | ✅ | ✅ | GA | v1 | 1.0 |
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| [MySQL]({{< ref setup-mysql.md >}}) | ✅ | ✅ | ✅ | ✅ | Alpha | v1 | 1.0 |
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| [PostgreSQL]({{< ref setup-postgresql.md >}}) | ✅ | ✅ | ✅ | ✅ | Alpha | v1 | 1.0 |
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| [Redis]({{< ref setup-redis.md >}}) | ✅ | ✅ | ✅ | ✅ | GA | v1 | 1.0 |
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| [RethinkDB]({{< ref setup-rethinkdb.md >}}) | ✅ | ✅ | ✅ | ✅ | Alpha | v1 | 1.0 |
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| [Zookeeper]({{< ref setup-zookeeper.md >}}) | ✅ | ❌ | ✅ | ❌ | Alpha | v1 | 1.0 |
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| Name | CRUD | Transactional | ETag | [TTL]({{< ref state-store-ttl.md >}}) | [Actors]({{< ref howto-actors.md >}}) | Status | Component version | Since |
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|----------------------------------------------------------------|------|---------------------|------|-----|------|--------| -------|------|
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| [Aerospike]({{< ref setup-aerospike.md >}}) | ✅ | ❌ | ✅ | ❌ | ❌ | Alpha | v1 | 1.0 |
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| [Apache Cassandra]({{< ref setup-cassandra.md >}}) | ✅ | ❌ | ❌ | ✅ | ❌ | Alpha | v1 | 1.0 |
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| [Cloudstate]({{< ref setup-cloudstate.md >}}) | ✅ | ❌ | ✅ | ❌ | ❌ | Alpha | v1 | 1.0 |
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| [Couchbase]({{< ref setup-couchbase.md >}}) | ✅ | ❌ | ✅ | ❌ | ❌ | Alpha | v1 | 1.0 |
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| [Hashicorp Consul]({{< ref setup-consul.md >}}) | ✅ | ❌ | ❌ | ❌ | ❌ | Alpha | v1 | 1.0 |
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| [Hazelcast]({{< ref setup-hazelcast.md >}}) | ✅ | ❌ | ❌ | ❌ | ❌ | Alpha | v1 | 1.0 |
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| [Memcached]({{< ref setup-memcached.md >}}) | ✅ | ❌ | ❌ | ✅ | ❌ | Alpha | v1 | 1.0 |
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| [MongoDB]({{< ref setup-mongodb.md >}}) | ✅ | ✅ | ✅ | ❌ | ✅ | GA | v1 | 1.0 |
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| [MySQL]({{< ref setup-mysql.md >}}) | ✅ | ✅ | ✅ | ❌ | ✅ | Alpha | v1 | 1.0 |
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| [PostgreSQL]({{< ref setup-postgresql.md >}}) | ✅ | ✅ | ✅ | ❌ | ✅ | Alpha | v1 | 1.0 |
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| [Redis]({{< ref setup-redis.md >}}) | ✅ | ✅ | ✅ | ✅ | ✅ | GA | v1 | 1.0 |
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| [RethinkDB]({{< ref setup-rethinkdb.md >}}) | ✅ | ✅ | ✅ | ❌ | ✅ | Alpha | v1 | 1.0 |
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| [Zookeeper]({{< ref setup-zookeeper.md >}}) | ✅ | ❌ | ✅ | ❌ | ❌ | Alpha | v1 | 1.0 |
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### Amazon Web Services (AWS)
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| Name | CRUD | Transactional | ETag | Actors | Status | Component version | Since |
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|------------------------------------------------------------------|------|---------------------|------|--------|-----|-----|-------|
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| [AWS DynamoDB]({{< ref setup-dynamodb.md>}}) | ✅ | ❌ | ❌ | ❌ | Alpha | v1 | 1.0 |
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| Name | CRUD | Transactional | ETag | [TTL]({{< ref state-store-ttl.md >}}) | [Actors]({{< ref howto-actors.md >}}) | Status | Component version | Since |
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|------------------------------------------------------------------|------|---------------------|------|-----|--------|-----|-----|-------|
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| [AWS DynamoDB]({{< ref setup-dynamodb.md>}}) | ✅ | ❌ | ❌ | ❌ | ❌ | Alpha | v1 | 1.0 |
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### Google Cloud Platform (GCP)
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| Name | CRUD | Transactional | ETag | Actors | Status | Component version | Since |
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|------------------------------------------------------------------|------|---------------------|------|--------|-----|-----|-------|
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| [GCP Firestore]({{< ref setup-firestore.md >}}) | ✅ | ❌ | ❌ | ❌ | Alpha | v1 | 1.0 |
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| Name | CRUD | Transactional | ETag | [TTL]({{< ref state-store-ttl.md >}}) | [Actors]({{< ref howto-actors.md >}}) | Status | Component version | Since |
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|------------------------------------------------------------------|------|---------------------|------|-----|--------|-----|-----|-------|
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| [GCP Firestore]({{< ref setup-firestore.md >}}) | ✅ | ❌ | ❌ | ❌ | ❌ | Alpha | v1 | 1.0 |
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### Microsoft Azure
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| Name | CRUD | Transactional | ETag | Actors | Status | Component version | Since |
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|------------------------------------------------------------------|------|---------------------|------|--------|-----|-----|-------|
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| [Azure Blob Storage]({{< ref setup-azure-blobstorage.md >}}) | ✅ | ❌ | ✅ | ❌ | GA | v1 | 1.0 |
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| [Azure CosmosDB]({{< ref setup-azure-cosmosdb.md >}}) | ✅ | ✅ | ✅ | ✅ | GA | v1 | 1.0 |
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| [Azure SQL Server]({{< ref setup-sqlserver.md >}}) | ✅ | ✅ | ✅ | ✅ | Alpha | v1 | 1.0 |
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| [Azure Table Storage]({{< ref setup-azure-tablestorage.md >}}) | ✅ | ❌ | ✅ | ❌ | Alpha | v1 | 1.0 |
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| Name | CRUD | Transactional | ETag | [TTL]({{< ref state-store-ttl.md >}}) | [Actors]({{< ref howto-actors.md >}}) | Status | Component version | Since |
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|------------------------------------------------------------------|------|---------------------|------|-----|--------|-----|-----|-------|
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| [Azure Blob Storage]({{< ref setup-azure-blobstorage.md >}}) | ✅ | ❌ | ✅ | ❌ | ❌ | GA | v1 | 1.0 |
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| [Azure CosmosDB]({{< ref setup-azure-cosmosdb.md >}}) | ✅ | ✅ | ✅ | ✅ | ✅ | GA | v1 | 1.0 |
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| [Azure SQL Server]({{< ref setup-sqlserver.md >}}) | ✅ | ✅ | ✅ | ❌ | ✅ | Alpha | v1 | 1.0 |
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| [Azure Table Storage]({{< ref setup-azure-tablestorage.md >}}) | ✅ | ❌ | ✅ | ❌ | ❌ | Alpha | v1 | 1.0 |
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