Get State By Linearid corda version 3.1 - corda

Question

I am trying to get a state by lineaId by getting a empty list:
my code:
val queryCriteria = QueryCriteria.LinearStateQueryCriteria(uuid = listOf(linearId.id))
val customerAuditor = serviceHub.vaultService.queryBy<CustomerAuditor>(queryCriteria).states.single()
Error:
java.util.NoSuchElementException: List is empty.
at kotlin.collections.CollectionsKt___CollectionsKt.single(_Collections.kt:472) ~[kotlin-stdlib-1.1.60.jar:1.1.60-release-55 (1.1.60)]
at com.hsbc.auditorFlow.updateCustomerInit$Initiator.call(UpdateCustomerAuditorInit.kt:59) ~[cordapp-customer-0.1.jar:?]
at com.hsbc.auditorFlow.updateCustomerInit$Initiator.call(UpdateCustomerAuditorInit.kt:31) ~[cordapp-customer-0.1.jar:?]
at net.corda.node.services.statemachine.FlowStateMachineImpl.run(FlowStateMachineImpl.kt:96) [corda-node-3.1-corda.jar:?]
at net.corda.node.services.statemachine.FlowStateMachineImpl.run(FlowStateMachineImpl.kt:44) [corda-node-3.1-corda.jar:?]
at co.paralleluniverse.fibers.Fiber.run1(Fiber.java:1092) [quasar-core-0.7.9-jdk8.jar:0.7.9]
at co.paralleluniverse.fibers.Fiber.exec(Fiber.java:788) [quasar-core-0.7.9-jdk8.jar:0.7.9]
at co.paralleluniverse.fibers.RunnableFiberTask.doExec(RunnableFiberTask.java:100) [quasar-core-0.7.9-jdk8.jar:0.7.9]
at co.paralleluniverse.fibers.RunnableFiberTask.run(RunnableFiberTask.java:91) [quasar-core-0.7.9-jdk8.jar:0.7.9]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_144]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_144]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:1.8.0_144]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:1.8.0_144]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_144]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_144]
at net.corda.node.utilities.AffinityExecutor$ServiceAffinityExecutor$1$thread$1.run(AffinityExecutor.kt:62) [corda-node-3.1-corda.jar:?]
When i do get all states the state is present:
val generalCriteria = QueryCriteria.VaultQueryCriteria(Vault.StateStatus.UNCONSUMED)
var pageNumber = DEFAULT_PAGE_NUM
val states = mutableListOf<StateAndRef<ContractState>>()
do {
val pageSpec = PageSpecification(pageSize = 200, pageNumber = pageNumber)
val results = services.vaultQueryByWithPagingSpec(CustomerAuditor::class.java,generalCriteria, pageSpec)
states.addAll(results.states);
pageNumber++
} while ((pageSpec.pageSize * pageSpec.pageNumber) <= results.totalStatesAvailable)
return states;
Output of this:
[
{
"state": {
"data": {
"linearId": {
"externalId": null,
"id": "d7b8331d-6a1a-408a-aff7-5c823e91c6e3"
}
},
"contract": "com.hsbc.contract.PSContract",
"encumbrance": null,
"constraint": {}
},
"ref": {
"txhash": {
"bytes": "FbMJYu2K1lrqHLK4rkhOogn5r/u7iAa26AobmrtWDRY=",
"size": 32,
"offset": 0
},
"index": 0
}
}
]
(i have removed the participants and notary tag as they were very big , i had 3 participants)

Answer 1

I always use this:
inline fun <reified T : LinearState> getLinearStateById(
linearId: UniqueIdentifier,
services: ServiceHub
): StateAndRef<T>? {
val query = QueryCriteria.LinearStateQueryCriteria(linearId = listOf(linearId))
return services.vaultService.queryBy<T>(query).states.singleOrNull()
}

Answer 2

I faced this. Just check if the Unconsumed State vault which you are trying to access is present Participants list. If it is not present than it will not be queried and thus list will always be empty. Hope this helps :)

Answer 3

In Java I did this way...!
#nithesh / #jayant let me know if it works..
UniqueIdentifier linearId = UniqueIdentifier.Companion.fromString(linearIdAsString);
QueryCriteria queryCriteria = new QueryCriteria.LinearStateQueryCriteria(
null, // List of Parties for the state
ImmutableList.of(linearId),
Vault.StateStatus.UNCONSUMED,
null // Set of State types
);
List<StateAndRef<YourState>> stateAndRefs = getServiceHub().getVaultService().queryBy(YourState.class, queryCriteria).getStates();
YourState yourState = stateAndRefs.get(0).getState().getData();