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Workaround to get state for actors given runtime API response issue. (#165)

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Artur Souza 2020-01-28 22:23:24 -08:00 committed by GitHub
parent 62f43e3f38
commit 50675532b2
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1 changed files with 36 additions and 3 deletions
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37
sdk-actors/src/main/java/io/dapr/actors/runtime/DaprStateAsyncProvider.java
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@ -7,11 +7,14 @@ package io.dapr.actors.runtime;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.ObjectMapper;
import io.dapr.actors.ActorId;
import io.dapr.serializer.DaprObjectSerializer;
import io.dapr.serializer.StringContentType;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import reactor.core.publisher.Mono;
/**
@ -19,6 +22,11 @@ import reactor.core.publisher.Mono;
*/
class DaprStateAsyncProvider {
/**
* Used to fix problem from Dapr's state response.
*/
private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
/**
* Shared Json Factory as per Jackson's documentation, used only for this class.
*/
@ -56,7 +64,7 @@ class DaprStateAsyncProvider {
return result.flatMap(s -> {
try {
T response = this.stateSerializer.deserialize(s, clazz);
T response = this.stateSerializer.deserialize(fixDaprStateResponse(s), clazz);
if (response == null) {
return Mono.empty();
}
@ -129,7 +137,7 @@ class DaprStateAsyncProvider {
generator.writeObjectFieldStart("request");
generator.writeStringField("key", stateChange.getStateName());
if ((stateChange.getChangeKind() == ActorStateChangeKind.UPDATE)
|| (stateChange.getChangeKind() == ActorStateChangeKind.ADD)) {
|| (stateChange.getChangeKind() == ActorStateChangeKind.ADD)) {
byte[] data = this.stateSerializer.serialize(stateChange.getValue());
if (data != null) {
if (this.isStateString) {
@ -164,4 +172,29 @@ class DaprStateAsyncProvider {
return this.daprClient.saveActorStateTransactionally(actorType, actorId.toString(), payload);
}
/**
* Workaround for a bug in Dapr's runtime where actor state is saved as a JSON string and
* returned as-is without deserializing first.
*
* @param raw Bytes received from Dapr.
* @return Corrected byte[].
*/
private byte[] fixDaprStateResponse(byte[] raw) {
if (raw == null) {
return raw;
}
if (raw.length == 0) {
return raw;
}
try {
return OBJECT_MAPPER.readValue(raw, String.class).getBytes();
} catch (IOException e) {
// We could not fix it, so iit goes as-is.
return raw;
}
}
}