How to implement Queryable state in corda? - corda

Question

I had a offer state which is implementing LinearState and It was working fine till this point. Then I needed to implement Queryable state in our Offer state But when I implement the Queryable state and implement the schema for persistent state and When I run the flow it is not doing anything and flow is terminating without showing any error. When I approched the logs of the node, an exception was there which is as follows:
stack (net.corda.node.services.statemachine.FlowStateMachineImpl)
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:101) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.write(CompatibleFieldSerializer.java:65) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.io.serialization.kryo.ReplaceableObjectKryo.writeObject(ReplaceableObjectKryo.java:85) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:79) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.write(CompatibleFieldSerializer.java:65) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.io.serialization.kryo.ReplaceableObjectKryo.writeObject(ReplaceableObjectKryo.java:85) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:79) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.write(CompatibleFieldSerializer.java:65) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.io.serialization.kryo.ReplaceableObjectKryo.writeObject(ReplaceableObjectKryo.java:85) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:79) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.write(CompatibleFieldSerializer.java:65) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.io.serialization.kryo.ReplaceableObjectKryo.writeClassAndObject(ReplaceableObjectKryo.java:54) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.serializers.DefaultArraySerializers$ObjectArraySerializer.write(DefaultArraySerializers.java:361) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.DefaultArraySerializers$ObjectArraySerializer.write(DefaultArraySerializers.java:302) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.io.serialization.kryo.ReplaceableObjectKryo.writeObject(ReplaceableObjectKryo.java:85) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:79) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.write(CompatibleFieldSerializer.java:65) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObjectOrNull(Kryo.java:629) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:86) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.FieldSerializer.write(FieldSerializer.java:508) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.fibers.Fiber$FiberSerializer.write(Fiber.java:2109) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at co.paralleluniverse.fibers.Fiber$FiberSerializer.write(Fiber.java:2086) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.io.serialization.kryo.ReplaceableObjectKryo.writeObject(ReplaceableObjectKryo.java:85) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:79) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.write(CompatibleFieldSerializer.java:65) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.io.serialization.kryo.ReplaceableObjectKryo.writeObject(ReplaceableObjectKryo.java:85) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:79) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.write(CompatibleFieldSerializer.java:65) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.io.serialization.kryo.ReplaceableObjectKryo.writeObject(ReplaceableObjectKryo.java:85) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:79) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.write(CompatibleFieldSerializer.java:65) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.io.serialization.kryo.ReplaceableObjectKryo.writeClassAndObject(ReplaceableObjectKryo.java:54) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.serializers.CollectionSerializer.write(CollectionSerializer.java:100) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.CollectionSerializer.write(CollectionSerializer.java:40) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.io.serialization.kryo.ReplaceableObjectKryo.writeObject(ReplaceableObjectKryo.java:85) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:79) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.write(CompatibleFieldSerializer.java:65) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObjectOrNull(Kryo.java:629) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:86) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.write(CompatibleFieldSerializer.java:65) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.io.serialization.kryo.ReplaceableObjectKryo.writeClassAndObject(ReplaceableObjectKryo.java:54) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.serializers.DefaultArraySerializers$ObjectArraySerializer.write(DefaultArraySerializers.java:361) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.DefaultArraySerializers$ObjectArraySerializer.write(DefaultArraySerializers.java:302) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.io.serialization.kryo.ReplaceableObjectKryo.writeObject(ReplaceableObjectKryo.java:85) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:79) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.write(CompatibleFieldSerializer.java:65) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObjectOrNull(Kryo.java:629) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:86) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.FieldSerializer.write(FieldSerializer.java:508) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.fibers.Fiber$FiberSerializer.write(Fiber.java:2109) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at co.paralleluniverse.fibers.Fiber$FiberSerializer.write(Fiber.java:2086) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at com.esotericsoftware.kryo.Kryo.writeObject(Kryo.java:575) ~[kryo-4.0.2.jar:?]
at co.paralleluniverse.io.serialization.kryo.ReplaceableObjectKryo.writeClassAndObject(ReplaceableObjectKryo.java:54) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at net.corda.nodeapi.internal.serialization.kryo.KryoCheckpointSerializer$serialize$1$1.invoke(KryoCheckpointSerializer.kt:116) ~[corda-node-api-4.5.jar:?]
at net.corda.nodeapi.internal.serialization.kryo.KryoCheckpointSerializer$serialize$1$1.invoke(KryoCheckpointSerializer.kt:42) ~[corda-node-api-4.5.jar:?]
at net.corda.nodeapi.internal.serialization.kryo.KryoStreams$kryoOutput$1.invoke(KryoStreams.kt:30) ~[corda-node-api-4.5.jar:?]
at net.corda.nodeapi.internal.serialization.kryo.KryoStreams$kryoOutput$1.invoke(KryoStreams.kt) ~[corda-node-api-4.5.jar:?]
at net.corda.serialization.internal.ByteBufferStreams.byteArrayOutput(ByteBufferStreams.kt:22) ~[corda-serialization-4.5.jar:?]
at net.corda.nodeapi.internal.serialization.kryo.KryoStreams.kryoOutput(KryoStreams.kt:26) ~[corda-node-api-4.5.jar:?]
at net.corda.nodeapi.internal.serialization.kryo.KryoCheckpointSerializer$serialize$1.invoke(KryoCheckpointSerializer.kt:107) ~[corda-node-api-4.5.jar:?]
at net.corda.nodeapi.internal.serialization.kryo.KryoCheckpointSerializer$serialize$1.invoke(KryoCheckpointSerializer.kt:42) ~[corda-node-api-4.5.jar:?]
at net.corda.nodeapi.internal.serialization.kryo.KryoCheckpointSerializer$kryo$1.execute(KryoCheckpointSerializer.kt:70) ~[corda-node-api-4.5.jar:?]
at com.esotericsoftware.kryo.pool.KryoPoolQueueImpl.run(KryoPoolQueueImpl.java:58) ~[kryo-4.0.2.jar:?]
at net.corda.nodeapi.internal.serialization.kryo.KryoCheckpointSerializer.kryo(KryoCheckpointSerializer.kt:66) ~[corda-node-api-4.5.jar:?]
at net.corda.nodeapi.internal.serialization.kryo.KryoCheckpointSerializer.serialize(KryoCheckpointSerializer.kt:106) ~[corda-node-api-4.5.jar:?]
at net.corda.core.serialization.internal.CheckpointSerializationAPIKt.checkpointSerialize(CheckpointSerializationAPI.kt:130) ~[corda-core-4.5.jar:?]
at net.corda.node.services.statemachine.FlowStateMachineImpl$suspend$1.write(FlowStateMachineImpl.kt:484) ~[corda-node-4.5.jar:?]
at co.paralleluniverse.fibers.Fiber$3.run(Fiber.java:1994) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at co.paralleluniverse.fibers.Fiber.exec(Fiber.java:824) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at co.paralleluniverse.fibers.RunnableFiberTask.doExec(RunnableFiberTask.java:100) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at co.paralleluniverse.fibers.RunnableFiberTask.run(RunnableFiberTask.java:91) ~[quasar-core-0.7.12_r3-jdk8.jar:0.7.12_r3]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_265]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_265]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) ~[?:1.8.0_265]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) ~[?:1.8.0_265]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_265]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_265]
at net.corda.node.utilities.AffinityExecutor$ServiceAffinityExecutor$1$thread$1.run(AffinityExecutor.kt:63) ~[corda-node-4.5.jar:?]
**Caused by: java.lang.UnsupportedOperationException: net.corda.nodeapi.internal.persistence.CordaPersistence, which is a closeable resource, has been detected during flow checkpointing. Restoring such resources across node restarts is not supported. Make sure code accessing it is confined to a private method or the reference is nulled out.**
at net.corda.nodeapi.internal.serialization.kryo.AutoCloseableSerialisationDetector.write(KryoCheckpointSerializer.kt:36) ~[corda-node-api-4.5.jar:?]
at net.corda.nodeapi.internal.serialization.kryo.AutoCloseableSerialisationDetector.write(KryoCheckpointSerializer.kt:31) ~[corda-node-api-4.5.jar:?]
at com.esotericsoftware.kryo.Kryo.writeObjectOrNull(Kryo.java:629) ~[kryo-4.0.2.jar:?]
at com.esotericsoftware.kryo.serializers.ObjectField.write(ObjectField.java:86) ~[kryo-4.0.2.jar:?]
... 89 more
I have made the line bold which I think defines the problem mostly.
Here is the code for the state.
#BelongsToContract(OfferContract.class)
public class OfferState implements LinearState, QueryableState {
private final UniqueIdentifier linearID;
private AnonymousParty sender;
private AnonymousParty receiver;
private final String policyID;
private final double faceValue;
private double offeredAmount;
#Nullable
private boolean isActive;
public OfferState(UniqueIdentifier linearID, AnonymousParty sender, AnonymousParty receiver, String policyID, double faceValue, double offeredAmount, boolean isActive) {
this.linearID = linearID;
this.sender = sender;
this.receiver = receiver;
this.policyID = policyID;
this.faceValue = faceValue;
this.offeredAmount = offeredAmount;
this.isActive = isActive;
}
public AnonymousParty getSender() {
return sender;
}
public AnonymousParty getReceiver() {
return receiver;
}
public double getOfferedAmount() {
return offeredAmount;
}
public String getPolicyID() {
return policyID;
}
public double getFaceValue() {
return faceValue;
}
public UniqueIdentifier getLinearID() {
return linearID;
}
public boolean isActive() {
return isActive;
}
#NotNull
#Override
public List<AbstractParty> getParticipants() {
return Arrays.asList(sender,receiver);
}
#NotNull
#Override
public UniqueIdentifier getLinearId() {
return linearID;
}
#Override
public PersistentState generateMappedObject(#NotNull MappedSchema schema) {
if (schema instanceof BeLifeSchemaV1) {
return new BeLifeSchemaV1.PersistentOffer(
this.sender.toString(),
this.receiver.toString(),
this.policyID,
this.faceValue,
this.offeredAmount,
this.linearID
);
} else {
throw new IllegalArgumentException("Unrecognised schema $schema");
}
}
#Override
public Iterable<MappedSchema> supportedSchemas() {
return Arrays.asList(new BeLifeSchemaV1());
}
#Override
public String toString() {
return String.format("OfferState(LinearID = %s, Sender = %s, receiver =%s, policyID = %s, faceValue = %.2f, offeredAmount = %.2f)",linearID,
sender.getClass().getName(),receiver.getClass().getName(),policyID,faceValue,offeredAmount );
}
}
This is the code for my schema
package com.template.Schema;
/**
* The family of schemas for IOUState.
*/
public class BeLifeSchema {}
And here is the code for SchemaV1
public class BeLifeSchemaV1 extends MappedSchema {
public BeLifeSchemaV1() {
super(BeLifeSchema.class, 1, Arrays.asList(PersistentOffer.class));
}
#Nullable
#Override
public String getMigrationResource() {
return "BeLife.changelog-master";
}
/**
* An OfferState schema.
*/
#Entity
#Table(name = "Offer_states")
public static class PersistentOffer extends PersistentState {
#Column(name = "sender") private final String sender;
#Column(name = "receiver") private final String receiver;
#Column(name = "policyID") private final String policyID;
#Column(name = "faceValue") private final double faceValue;
#Column(name = "offeredAmount") private final double offeredAmount;
#Column(name = "linear_id") #Type (type = "uuid-char") private final UniqueIdentifier linearId;
public PersistentOffer(String sender, String receiver, String policyID, double faceValue, double offeredAmount, UniqueIdentifier linearId) {
this.sender = sender;
this.receiver = receiver;
this.policyID = policyID;
this.faceValue = faceValue;
this.offeredAmount = offeredAmount;
this.linearId = linearId;
}
// Default constructor required by hibernate.
public PersistentOffer() {
this.policyID = null;
this.offeredAmount = 0;
this.sender = null;
this.receiver = null;
this.faceValue = 0;
this.linearId = null;
}
public String getSender() {
return sender;
}
public String getReceiver() {
return receiver;
}
public String getPolicyID() {
return policyID;
}
public double getFaceValue() {
return faceValue;
}
public double getOfferedAmount() {
return offeredAmount;
}
public UniqueIdentifier getLinearId() {
return linearId;
}
}
}
I could not find any solution for this till now.
Please see If anyone can help. I am stuck here for days now.

Answer 1

As Adel said, without your schema it's hard to know what could be causing this.
Separately the error is actually mentioned in that log here:
**Caused by: java.lang.UnsupportedOperationException: net.corda.nodeapi.internal.persistence.CordaPersistence, which is a closeable resource, has been detected during flow checkpointing. Restoring such resources across node restarts is not supported. Make sure code accessing it is confined to a private method or the reference is nulled out.**
That being said the last thing I can share is some examples of queryableState being implemented. R3 maintains some samples.
In this IOUState sample the class implements both LinearState and QueryableState.
https://github.com/corda/samples-java/blob/master/Basic/cordapp-example/contracts-java/src/main/java/com/example/state/IOUState.java
There's also this sample using QueryableState for a Car insurance use case.
https://github.com/corda/samples-java/blob/master/Features/queryablestate-carinsurance/contracts/src/main/java/net/corda/examples/carinsurance/states/InsuranceState.java
good luck!