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io.dapr.actors.runtime.DaprHttpClient Maven / Gradle / Ivy
/*
* Copyright (c) Microsoft Corporation and Dapr Contributors.
* Licensed under the MIT License.
*/
package io.dapr.actors.runtime;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonGenerator;
import io.dapr.client.DaprHttp;
import reactor.core.publisher.Mono;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.List;
/**
* A DaprClient over HTTP for Actor's runtime.
*/
class DaprHttpClient implements DaprClient {
/**
* Internal serializer for state.
*/
private static final ActorObjectSerializer INTERNAL_SERIALIZER = new ActorObjectSerializer();
/**
* Shared Json Factory as per Jackson's documentation, used only for this class.
*/
private static final JsonFactory JSON_FACTORY = new JsonFactory();
/**
* The HTTP client to be used.
*
* @see DaprHttp
*/
private final DaprHttp client;
/**
* Internal constructor.
*
* @param client Dapr's http client.
*/
DaprHttpClient(DaprHttp client) {
this.client = client;
}
/**
* {@inheritDoc}
*/
@Override
public Mono getState(String actorType, String actorId, String keyName) {
String[] pathSegments = new String[] { DaprHttp.API_VERSION, "actors", actorType, actorId, "state", keyName };
Mono responseMono =
this.client.invokeApi(DaprHttp.HttpMethods.GET.name(), pathSegments, null, "", null, null);
return responseMono.map(r -> {
if ((r.getStatusCode() != 200) && (r.getStatusCode() != 204)) {
throw new IllegalStateException(
String.format("Error getting actor state: %s/%s/%s", actorType, actorId, keyName));
}
return r.getBody();
});
}
/**
* {@inheritDoc}
*/
@Override
public Mono saveStateTransactionally(
String actorType,
String actorId,
List operations) {
// Constructing the JSON via a stream API to avoid creating transient objects to be instantiated.
byte[] payload = null;
try (ByteArrayOutputStream writer = new ByteArrayOutputStream()) {
JsonGenerator generator = JSON_FACTORY.createGenerator(writer);
// Start array
generator.writeStartArray();
for (ActorStateOperation stateOperation : operations) {
// Start operation object.
generator.writeStartObject();
generator.writeStringField("operation", stateOperation.getOperationType());
// Start request object.
generator.writeObjectFieldStart("request");
generator.writeStringField("key", stateOperation.getKey());
Object value = stateOperation.getValue();
if (value != null) {
if (value instanceof String) {
// DefaultObjectSerializer is a JSON serializer, so we just pass it on.
generator.writeFieldName("value");
generator.writeRawValue((String) value);
} else if (value instanceof byte[]) {
// Custom serializer uses byte[].
// DefaultObjectSerializer is just a passthrough for byte[], so we handle it here too.
generator.writeBinaryField("value", (byte[]) value);
} else {
return Mono.error(() -> {
throw new IllegalArgumentException("Actor state value must be String or byte[]");
});
}
}
// End request object.
generator.writeEndObject();
// End operation object.
generator.writeEndObject();
}
// End array
generator.writeEndArray();
generator.close();
writer.flush();
payload = writer.toByteArray();
} catch (IOException e) {
return Mono.error(e);
}
String[] pathSegments = new String[] { DaprHttp.API_VERSION, "actors", actorType, actorId, "state" };
return this.client.invokeApi(DaprHttp.HttpMethods.PUT.name(), pathSegments, null, payload, null, null).then();
}
/**
* {@inheritDoc}
*/
@Override
public Mono registerReminder(
String actorType,
String actorId,
String reminderName,
ActorReminderParams reminderParams) {
String[] pathSegments = new String[] {
DaprHttp.API_VERSION,
"actors",
actorType,
actorId,
"reminders",
reminderName
};
return Mono.fromCallable(() -> INTERNAL_SERIALIZER.serialize(reminderParams))
.flatMap(data ->
this.client.invokeApi(DaprHttp.HttpMethods.PUT.name(), pathSegments, null, data, null, null)
).then();
}
/**
* {@inheritDoc}
*/
@Override
public Mono unregisterReminder(String actorType, String actorId, String reminderName) {
String[] pathSegments = new String[] {
DaprHttp.API_VERSION,
"actors",
actorType,
actorId,
"reminders",
reminderName
};
return this.client.invokeApi(DaprHttp.HttpMethods.DELETE.name(), pathSegments, null, null, null).then();
}
/**
* {@inheritDoc}
*/
@Override
public Mono registerTimer(
String actorType,
String actorId,
String timerName,
ActorTimerParams timerParams) {
return Mono.fromCallable(() -> INTERNAL_SERIALIZER.serialize(timerParams))
.flatMap(data -> {
String[] pathSegments = new String[] {
DaprHttp.API_VERSION,
"actors",
actorType,
actorId,
"timers",
timerName
};
return this.client.invokeApi(DaprHttp.HttpMethods.PUT.name(), pathSegments, null, data, null, null);
}).then();
}
/**
* {@inheritDoc}
*/
@Override
public Mono unregisterTimer(String actorType, String actorId, String timerName) {
String[] pathSegments = new String[] { DaprHttp.API_VERSION, "actors", actorType, actorId, "timers", timerName };
return this.client.invokeApi(DaprHttp.HttpMethods.DELETE.name(), pathSegments, null, null, null).then();
}
}
