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Initial version of durable state plugin docs (#574)
* Initial version of durable state plugin docs * Changed Optional#isEmpty since it's not there in JDK 8
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core/src/test/java/akka/persistence/jdbc/state/JavadslSnippets.java
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|---|---|---|
| @@ -0,0 +1,159 @@ | ||
| package akka.persistence.jdbc.state; | ||
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| import java.util.concurrent.CompletionStage; | ||
| import akka.actor.ActorSystem; | ||
| import akka.Done; | ||
| import akka.NotUsed; | ||
| // #create | ||
| import akka.persistence.jdbc.testkit.javadsl.SchemaUtils; | ||
| // #create | ||
| // #jdbc-durable-state-store | ||
| import akka.persistence.state.DurableStateStoreRegistry; | ||
| import akka.persistence.jdbc.state.javadsl.JdbcDurableStateStore; | ||
| // #jdbc-durable-state-store | ||
| // #get-object | ||
| import akka.persistence.state.DurableStateStoreRegistry; | ||
| import akka.persistence.jdbc.state.javadsl.JdbcDurableStateStore; | ||
| import akka.persistence.state.javadsl.GetObjectResult; | ||
| // #get-object | ||
| // #upsert-get-object | ||
| import akka.persistence.state.DurableStateStoreRegistry; | ||
| import akka.persistence.jdbc.state.javadsl.JdbcDurableStateStore; | ||
| import akka.persistence.state.javadsl.GetObjectResult; | ||
| // #upsert-get-object | ||
| // #delete-object | ||
| import akka.persistence.state.DurableStateStoreRegistry; | ||
| import akka.persistence.jdbc.state.javadsl.JdbcDurableStateStore; | ||
| // #delete-object | ||
| // #current-changes | ||
| import akka.NotUsed; | ||
| import akka.stream.javadsl.Source; | ||
| import akka.persistence.state.DurableStateStoreRegistry; | ||
| import akka.persistence.jdbc.state.javadsl.JdbcDurableStateStore; | ||
| import akka.persistence.query.DurableStateChange; | ||
| import akka.persistence.query.NoOffset; | ||
| // #current-changes | ||
| // #changes | ||
| import akka.NotUsed; | ||
| import akka.stream.javadsl.Source; | ||
| import akka.persistence.state.DurableStateStoreRegistry; | ||
| import akka.persistence.jdbc.state.javadsl.JdbcDurableStateStore; | ||
| import akka.persistence.query.DurableStateChange; | ||
| import akka.persistence.query.NoOffset; | ||
| // #changes | ||
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| final class JavadslSnippets { | ||
| void create() { | ||
| // #create | ||
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| ActorSystem system = ActorSystem.create("example"); | ||
| CompletionStage<Done> done = SchemaUtils.createIfNotExists(system); | ||
| // #create | ||
| } | ||
|
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| void durableStatePlugin() { | ||
| ActorSystem system = ActorSystem.create("example"); | ||
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| // #jdbc-durable-state-store | ||
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| @SuppressWarnings("unchecked") | ||
| JdbcDurableStateStore<String> store = | ||
| DurableStateStoreRegistry.get(system) | ||
| .getDurableStateStoreFor(JdbcDurableStateStore.class, "akka.persistence.state.jdbc"); | ||
| // #jdbc-durable-state-store | ||
| } | ||
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| void getObject() { | ||
| ActorSystem system = ActorSystem.create("example"); | ||
|
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| // #get-object | ||
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| @SuppressWarnings("unchecked") | ||
| JdbcDurableStateStore<String> store = | ||
| DurableStateStoreRegistry.get(system) | ||
| .getDurableStateStoreFor(JdbcDurableStateStore.class, "akka.persistence.state.jdbc"); | ||
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| CompletionStage<GetObjectResult<String>> futureResult = store.getObject("InvalidPersistenceId"); | ||
| try { | ||
| GetObjectResult<String> result = futureResult.toCompletableFuture().get(); | ||
| assert !result.value().isPresent(); | ||
| } catch (Exception e) { | ||
| // handle exceptions | ||
| } | ||
| // #get-object | ||
| } | ||
|
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| void upsertAndGetObject() { | ||
| ActorSystem system = ActorSystem.create("example"); | ||
|
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| // #upsert-get-object | ||
|
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| @SuppressWarnings("unchecked") | ||
| JdbcDurableStateStore<String> store = | ||
| DurableStateStoreRegistry.get(system) | ||
| .getDurableStateStoreFor(JdbcDurableStateStore.class, "akka.persistence.state.jdbc"); | ||
|
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| CompletionStage<GetObjectResult<String>> r = | ||
| store | ||
| .upsertObject("p234", 1, "a valid string", "t123") | ||
| .thenCompose(d -> store.getObject("p234")) | ||
| .thenCompose(o -> store.upsertObject("p234", 2, "updated valid string", "t123")) | ||
| .thenCompose(d -> store.getObject("p234")); | ||
|
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| try { | ||
| assert r.toCompletableFuture().get().value().get().equals("updated valid string"); | ||
| } catch (Exception e) { | ||
| // handle exceptions | ||
| } | ||
| // #upsert-get-object | ||
| } | ||
|
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| void deleteObject() { | ||
| ActorSystem system = ActorSystem.create("example"); | ||
|
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| // #delete-object | ||
|
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| @SuppressWarnings("unchecked") | ||
| JdbcDurableStateStore<String> store = | ||
| DurableStateStoreRegistry.get(system) | ||
| .getDurableStateStoreFor(JdbcDurableStateStore.class, "akka.persistence.state.jdbc"); | ||
|
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| CompletionStage<Done> futureResult = store.deleteObject("p123"); | ||
| try { | ||
| assert futureResult.toCompletableFuture().get().equals(Done.getInstance()); | ||
| } catch (Exception e) { | ||
| // handle exceptions | ||
| } | ||
| // #delete-object | ||
| } | ||
|
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| void currentChanges() { | ||
| ActorSystem system = ActorSystem.create("example"); | ||
|
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| // #current-changes | ||
|
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| @SuppressWarnings("unchecked") | ||
| JdbcDurableStateStore<String> store = | ||
| DurableStateStoreRegistry.get(system) | ||
| .getDurableStateStoreFor(JdbcDurableStateStore.class, "akka.persistence.state.jdbc"); | ||
|
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| Source<DurableStateChange<String>, NotUsed> willCompleteTheStream = | ||
| store.currentChanges("tag-1", NoOffset.getInstance()); | ||
| // #current-changes | ||
| } | ||
|
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| void changes() { | ||
| ActorSystem system = ActorSystem.create("example"); | ||
|
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| // #changes | ||
|
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| @SuppressWarnings("unchecked") | ||
| JdbcDurableStateStore<String> store = | ||
| DurableStateStoreRegistry.get(system) | ||
| .getDurableStateStoreFor(JdbcDurableStateStore.class, "akka.persistence.state.jdbc"); | ||
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| Source<DurableStateChange<String>, NotUsed> willNotCompleteTheStream = | ||
| store.changes("tag-1", NoOffset.getInstance()); | ||
| // #changes | ||
| } | ||
| } |
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