ENT-2414 Named caches (#3848)

* Add named caches and apply to NonInvalidingUnboundCache and all usages.

* Add named caches and apply to NonInvalidingCache and all usages.

* Add named caches and apply to NonInvalidingWeightBasedCache and all usages.

* Move NamedCache to core/internal

* Remove type `NamedCache` and `NamedLoadingCache`

* Suppressed 'name not used' warning, added comment, and fixed generic parameters on the buildNamed functions.

* Use `buildNamed` in all caffeine instances in production code. Not using it for caches that are created in test code.

* Add checks for the cache name

* Formatting

* Minor code review revisions

.idea/compiler.xml

@@ -24,6 +24,8 @@
       <module name="buildSrc_test" target="1.8" />
       <module name="canonicalizer_main" target="1.8" />
       <module name="canonicalizer_test" target="1.8" />
+      <module name="cli_main" target="1.8" />
+      <module name="cli_test" target="1.8" />
       <module name="client_main" target="1.8" />
       <module name="client_test" target="1.8" />
       <module name="cliutils_main" target="1.8" />
@@ -233,4 +235,4 @@
   <component name="JavacSettings">
     <option name="ADDITIONAL_OPTIONS_STRING" value="-parameters" />
   </component>
-</project>
+</project>

client/jfx/src/main/kotlin/net/corda/client/jfx/model/NetworkIdentityModel.kt

@@ -6,6 +6,7 @@ import javafx.collections.FXCollections
 import javafx.collections.ObservableList
 import net.corda.client.jfx.utils.*
 import net.corda.core.identity.AnonymousParty
+import net.corda.core.internal.buildNamed
 import net.corda.core.node.NodeInfo
 import net.corda.core.node.services.NetworkMapCache.MapChange
 import java.security.PublicKey
@@ -30,7 +31,7 @@ class NetworkIdentityModel {
     private val rpcProxy by observableValue(NodeMonitorModel::proxyObservable)
 
     private val identityCache = Caffeine.newBuilder()
-            .build<PublicKey, ObservableValue<NodeInfo?>>({ publicKey ->
+            .buildNamed<PublicKey, ObservableValue<NodeInfo?>>("NetworkIdentityModel_identity", { publicKey ->
                 publicKey.let { rpcProxy.map { it?.cordaRPCOps?.nodeInfoFromParty(AnonymousParty(publicKey)) } }
             })
     val notaries = ChosenList(rpcProxy.map { FXCollections.observableList(it?.cordaRPCOps?.notaryIdentities() ?: emptyList()) }, "notaries")

client/rpc/src/main/kotlin/net/corda/client/rpc/internal/RPCClientProxyHandler.kt

@@ -14,10 +14,7 @@ import net.corda.client.rpc.internal.serialization.amqp.RpcClientObservableDeSer
 import net.corda.core.context.Actor
 import net.corda.core.context.Trace
 import net.corda.core.context.Trace.InvocationId
-import net.corda.core.internal.LazyStickyPool
-import net.corda.core.internal.LifeCycle
-import net.corda.core.internal.ThreadBox
-import net.corda.core.internal.times
+import net.corda.core.internal.*
 import net.corda.core.messaging.RPCOps
 import net.corda.core.serialization.SerializationContext
 import net.corda.core.serialization.serialize
@@ -162,9 +159,7 @@ class RPCClientProxyHandler(
             observablesToReap.locked { observables.add(observableId) }
         }
         return Caffeine.newBuilder().
-                weakValues().
-                removalListener(onObservableRemove).executor(SameThreadExecutor.getExecutor()).
-                build()
+                weakValues().removalListener(onObservableRemove).executor(SameThreadExecutor.getExecutor()).buildNamed("RpcClientProxyHandler_rpcObservable")
     }
 
     private var sessionFactory: ClientSessionFactory? = null

core/build.gradle

@@ -84,6 +84,9 @@ dependencies {
     // Guava: Google utilities library.
     testCompile "com.google.guava:guava:$guava_version"
 
+    // For caches rather than guava
+    compile "com.github.ben-manes.caffeine:caffeine:$caffeine_version"
+
     // Smoke tests do NOT have any Node code on the classpath!
     smokeTestCompile project(':smoke-test-utils')
     smokeTestCompile "org.assertj:assertj-core:${assertj_version}"

core/src/main/kotlin/net/corda/core/internal/NamedCache.kt

@@ -0,0 +1,41 @@
+package net.corda.core.internal
+
+import com.github.benmanes.caffeine.cache.Cache
+import com.github.benmanes.caffeine.cache.CacheLoader
+import com.github.benmanes.caffeine.cache.Caffeine
+import com.github.benmanes.caffeine.cache.LoadingCache
+
+/**
+ * Restrict the allowed characters of a cache name - this ensures that each cache has a name, and that
+ * the name can be used to create a file name or a metric name.
+ */
+internal fun checkCacheName(name: String) {
+    require(!name.isBlank())
+    require(allowedChars.matches(name))
+}
+
+private val allowedChars = Regex("^[0-9A-Za-z_.]*\$")
+
+/* buildNamed is the central helper method to build caffeine caches in Corda.
+ * This allows to easily add tweaks to all caches built in Corda, and also forces
+ * cache users to give their cache a (meaningful) name that can be used e.g. for
+ * capturing cache traces etc.
+ *
+ * Currently it is not used in this version of CORDA, but there are plans to do so.
+ */
+
+fun <K, V> Caffeine<in K, in V>.buildNamed(name: String): Cache<K, V> {
+    checkCacheName(name)
+    return this.build<K, V>()
+}
+
+fun <K, V> Caffeine<in K, in V>.buildNamed(name: String, loadFunc: (K) -> V): LoadingCache<K, V> {
+    checkCacheName(name)
+    return this.build<K, V>(loadFunc)
+}
+
+
+fun <K, V> Caffeine<in K, in V>.buildNamed(name: String, loader: CacheLoader<K, V>): LoadingCache<K, V> {
+    checkCacheName(name)
+    return this.build<K, V>(loader)
+}

core/src/test/kotlin/net/corda/core/internal/NamedCacheTest.kt

@@ -0,0 +1,24 @@
+package net.corda.core.internal
+
+import org.junit.Test
+import kotlin.test.assertEquals
+
+class NamedCacheTest {
+    fun checkNameHelper(name: String, throws: Boolean) {
+        var exceptionThrown = false
+        try {
+            checkCacheName(name)
+        } catch (e: Exception) {
+            exceptionThrown = true
+        }
+        assertEquals(throws, exceptionThrown)
+    }
+
+    @Test
+    fun TestCheckCacheName() {
+        checkNameHelper("abc_123.234", false)
+        checkNameHelper("", true)
+        checkNameHelper("abc 123", true)
+        checkNameHelper("abc/323", true)
+    }
+}

node-api/src/main/kotlin/net/corda/nodeapi/internal/DeduplicationChecker.kt

@@ -2,6 +2,7 @@ package net.corda.nodeapi.internal
 
 import com.github.benmanes.caffeine.cache.CacheLoader
 import com.github.benmanes.caffeine.cache.Caffeine
+import net.corda.core.internal.buildNamed
 import java.time.Duration
 import java.util.concurrent.TimeUnit
 import java.util.concurrent.atomic.AtomicLong
@@ -9,11 +10,11 @@ import java.util.concurrent.atomic.AtomicLong
 /**
  * A class allowing the deduplication of a strictly incrementing sequence number.
  */
-class DeduplicationChecker(cacheExpiry: Duration) {
+class DeduplicationChecker(cacheExpiry: Duration, name: String = "DeduplicationChecker") {
     // dedupe identity -> watermark cache
     private val watermarkCache = Caffeine.newBuilder()
             .expireAfterAccess(cacheExpiry.toNanos(), TimeUnit.NANOSECONDS)
-            .build(WatermarkCacheLoader)
+            .buildNamed("${name}_watermark", WatermarkCacheLoader)
 
     private object WatermarkCacheLoader : CacheLoader<Any, AtomicLong> {
         override fun load(key: Any) = AtomicLong(-1)

node-api/src/main/kotlin/net/corda/nodeapi/internal/persistence/HibernateConfiguration.kt

@@ -1,6 +1,7 @@
 package net.corda.nodeapi.internal.persistence
 
 import com.github.benmanes.caffeine.cache.Caffeine
+import net.corda.core.internal.buildNamed
 import net.corda.core.internal.castIfPossible
 import net.corda.core.schemas.MappedSchema
 import net.corda.core.utilities.contextLogger
@@ -57,7 +58,7 @@ class HibernateConfiguration(
         }
     }
 
-    private val sessionFactories = Caffeine.newBuilder().maximumSize(databaseConfig.mappedSchemaCacheSize).build<Set<MappedSchema>, SessionFactory>()
+    private val sessionFactories = Caffeine.newBuilder().maximumSize(databaseConfig.mappedSchemaCacheSize).buildNamed<Set<MappedSchema>, SessionFactory>("HibernateConfiguration_sessionFactories")
 
     val sessionFactoryForRegisteredSchemas = schemas.let {
         logger.info("Init HibernateConfiguration for schemas: $it")

node/src/main/kotlin/net/corda/node/internal/security/RPCSecurityManagerImpl.kt

@@ -5,6 +5,7 @@ import com.github.benmanes.caffeine.cache.Cache
 import com.github.benmanes.caffeine.cache.Caffeine
 import com.google.common.primitives.Ints
 import net.corda.core.context.AuthServiceId
+import net.corda.core.internal.buildNamed
 import net.corda.core.internal.uncheckedCast
 import net.corda.core.utilities.loggerFor
 import net.corda.node.internal.DataSourceFactory
@@ -308,7 +309,7 @@ private class CaffeineCacheManager(val maxSize: Long,
         return Caffeine.newBuilder()
                 .expireAfterWrite(timeToLiveSeconds, TimeUnit.SECONDS)
                 .maximumSize(maxSize)
-                .build<K, V>()
+                .buildNamed<K, V>("RPCSecurityManagerShiroCache_$name")
                 .toShiroCache()
     }
 

node/src/main/kotlin/net/corda/node/services/identity/PersistentIdentityService.kt

@@ -35,6 +35,7 @@ class PersistentIdentityService : SingletonSerializeAsToken(), IdentityServiceIn
 
         fun createPKMap(): AppendOnlyPersistentMap<SecureHash, PartyAndCertificate, PersistentIdentity, String> {
             return AppendOnlyPersistentMap(
+                    "PersistentIdentityService_partyByKey",
                     toPersistentEntityKey = { it.toString() },
                     fromPersistentEntity = {
                         Pair(
@@ -51,6 +52,7 @@ class PersistentIdentityService : SingletonSerializeAsToken(), IdentityServiceIn
 
         fun createX500Map(): AppendOnlyPersistentMap<CordaX500Name, SecureHash, PersistentIdentityNames, String> {
             return AppendOnlyPersistentMap(
+                    "PersistentIdentityService_partyByName",
                     toPersistentEntityKey = { it.toString() },
                     fromPersistentEntity = { Pair(CordaX500Name.parse(it.name), SecureHash.parse(it.publicKeyHash)) },
                     toPersistentEntity = { key: CordaX500Name, value: SecureHash ->

node/src/main/kotlin/net/corda/node/services/keys/PersistentKeyManagementService.kt

@@ -49,6 +49,7 @@ class PersistentKeyManagementService(val identityService: PersistentIdentityServ
     private companion object {
         fun createKeyMap(): AppendOnlyPersistentMap<PublicKey, PrivateKey, PersistentKey, String> {
             return AppendOnlyPersistentMap(
+                    "PersistentKeyManagementService_keys",
                     toPersistentEntityKey = { it.toStringShort() },
                     fromPersistentEntity = { Pair(Crypto.decodePublicKey(it.publicKey), Crypto.decodePrivateKey(
                             it.privateKey)) },

node/src/main/kotlin/net/corda/node/services/messaging/P2PMessageDeduplicator.kt

@@ -25,6 +25,7 @@ class P2PMessageDeduplicator(private val database: CordaPersistence) {
 
     private fun createProcessedMessages(): AppendOnlyPersistentMap<DeduplicationId, MessageMeta, ProcessedMessage, String> {
         return AppendOnlyPersistentMap(
+                "P2PMessageDeduplicator_processedMessages",
                 toPersistentEntityKey = { it.toString },
                 fromPersistentEntity = { Pair(DeduplicationId(it.id), MessageMeta(it.insertionTime, it.hash, it.seqNo)) },
                 toPersistentEntity = { key: DeduplicationId, value: MessageMeta ->

node/src/main/kotlin/net/corda/node/services/messaging/RPCServer.kt

@@ -13,6 +13,7 @@ import net.corda.core.context.Trace
 import net.corda.core.context.Trace.InvocationId
 import net.corda.core.identity.CordaX500Name
 import net.corda.core.internal.LifeCycle
+import net.corda.core.internal.buildNamed
 import net.corda.core.messaging.RPCOps
 import net.corda.core.serialization.SerializationContext
 import net.corda.core.serialization.SerializationDefaults
@@ -153,7 +154,7 @@ class RPCServer(
             log.debug { "Unsubscribing from Observable with id $key because of $cause" }
             value!!.subscription.unsubscribe()
         }
-        return Caffeine.newBuilder().removalListener(onObservableRemove).executor(SameThreadExecutor.getExecutor()).build()
+        return Caffeine.newBuilder().removalListener(onObservableRemove).executor(SameThreadExecutor.getExecutor()).buildNamed("RPCServer_observableSubscription")
     }
 
     fun start(activeMqServerControl: ActiveMQServerControl) {

node/src/main/kotlin/net/corda/node/services/network/PersistentNetworkMapCache.kt

@@ -122,7 +122,9 @@ open class PersistentNetworkMapCache(private val database: CordaPersistence,
 
     override fun getNodesByLegalIdentityKey(identityKey: PublicKey): List<NodeInfo> = nodesByKeyCache[identityKey]!!
 
-    private val nodesByKeyCache = NonInvalidatingCache<PublicKey, List<NodeInfo>>(1024) { key ->
+    private val nodesByKeyCache = NonInvalidatingCache<PublicKey, List<NodeInfo>>(
+            "PersistentNetworkMap_nodesByKey",
+            1024) { key ->
         database.transaction { queryByIdentityKey(session, key) }
     }
 
@@ -140,7 +142,9 @@ open class PersistentNetworkMapCache(private val database: CordaPersistence,
         return identityByLegalNameCache.get(name)!!.orElse(null)
     }
 
-    private val identityByLegalNameCache = NonInvalidatingCache<CordaX500Name, Optional<PartyAndCertificate>>(1024) { name ->
+    private val identityByLegalNameCache = NonInvalidatingCache<CordaX500Name, Optional<PartyAndCertificate>>(
+            "PersistentNetworkMap_idByLegalName",
+            1024) { name ->
         Optional.ofNullable(database.transaction { queryIdentityByLegalName(session, name) })
     }
 

node/src/main/kotlin/net/corda/node/services/persistence/DBTransactionStorage.kt

@@ -52,6 +52,7 @@ class DBTransactionStorage(cacheSizeBytes: Long, private val database: CordaPers
         fun createTransactionsMap(maxSizeInBytes: Long)
                 : AppendOnlyPersistentMapBase<SecureHash, TxCacheValue, DBTransaction, String> {
             return WeightBasedAppendOnlyPersistentMap<SecureHash, TxCacheValue, DBTransaction, String>(
+                    name = "DBTransactionStorage_transactions",
                     toPersistentEntityKey = { it.toString() },
                     fromPersistentEntity = {
                         Pair(SecureHash.parse(it.txId),

node/src/main/kotlin/net/corda/node/services/persistence/NodeAttachmentService.kt

@@ -206,6 +206,7 @@ class NodeAttachmentService(
     // a problem somewhere else or this needs to be revisited.
 
     private val attachmentContentCache = NonInvalidatingWeightBasedCache(
+            name = "NodeAttachmentService_attachmentContent",
             maxWeight = attachmentContentCacheSize,
             weigher = Weigher<SecureHash, Optional<Pair<Attachment, ByteArray>>> { key, value -> key.size + if (value.isPresent) value.get().second.size else 0 },
             loadFunction = { Optional.ofNullable(loadAttachmentContent(it)) }
@@ -226,7 +227,9 @@ class NodeAttachmentService(
         }
     }
 
-    private val attachmentCache = NonInvalidatingCache<SecureHash, Optional<Attachment>>(attachmentCacheBound) { key ->
+    private val attachmentCache = NonInvalidatingCache<SecureHash, Optional<Attachment>>(
+            "NodeAttachmentService_attachemnt",
+            attachmentCacheBound) { key ->
         Optional.ofNullable(createAttachment(key))
     }
 

node/src/main/kotlin/net/corda/node/services/persistence/NodePropertiesPersistentStore.kt

@@ -48,6 +48,7 @@ class FlowsDrainingModeOperationsImpl(readPhysicalNodeId: () -> String, private
     }
 
     internal val map = PersistentMap(
+            "FlowDrainingMode_nodeProperties",
             { key -> key },
             { entity -> entity.key to entity.value!! },
             NodePropertiesPersistentStore::DBNodeProperty,

node/src/main/kotlin/net/corda/node/services/transactions/BFTNonValidatingNotaryService.kt

@@ -102,6 +102,7 @@ class BFTNonValidatingNotaryService(
 
     private fun createMap(): AppendOnlyPersistentMap<StateRef, SecureHash, CommittedState, PersistentStateRef> {
         return AppendOnlyPersistentMap(
+                "BFTNonValidatingNotaryService_transactions",
                 toPersistentEntityKey = { PersistentStateRef(it.txhash.toString(), it.index) },
                 fromPersistentEntity = {
                     //TODO null check will become obsolete after making DB/JPA columns not nullable

node/src/main/kotlin/net/corda/node/services/transactions/PersistentUniquenessProvider.kt

@@ -77,6 +77,7 @@ class PersistentUniquenessProvider(val clock: Clock) : UniquenessProvider, Singl
         private val log = contextLogger()
         fun createMap(): AppendOnlyPersistentMap<StateRef, SecureHash, CommittedState, PersistentStateRef> =
                 AppendOnlyPersistentMap(
+                        "PersistentUniquenessProvider_transactions",
                         toPersistentEntityKey = { PersistentStateRef(it.txhash.toString(), it.index) },
                         fromPersistentEntity = {
                             //TODO null check will become obsolete after making DB/JPA columns not nullable

node/src/main/kotlin/net/corda/node/services/transactions/RaftUniquenessProvider.kt

@@ -61,6 +61,7 @@ class RaftUniquenessProvider(
         private val log = contextLogger()
         fun createMap(): AppendOnlyPersistentMap<StateRef, Pair<Long, SecureHash>, CommittedState, PersistentStateRef> =
                 AppendOnlyPersistentMap(
+                        "RaftUniquenessProvider_transactions",
                         toPersistentEntityKey = { PersistentStateRef(it) },
                         fromPersistentEntity = {
                             val txId = it.id.txId

node/src/main/kotlin/net/corda/node/services/upgrade/ContractUpgradeServiceImpl.kt

@@ -28,6 +28,7 @@ class ContractUpgradeServiceImpl : ContractUpgradeService, SingletonSerializeAsT
     private companion object {
         fun createContractUpgradesMap(): PersistentMap<String, String, DBContractUpgrade, String> {
             return PersistentMap(
+                    "ContractUpgradeService_upgrades",
                     toPersistentEntityKey = { it },
                     fromPersistentEntity = { Pair(it.stateRef, it.upgradedContractClassName ?: "") },
                     toPersistentEntity = { key: String, value: String ->

node/src/main/kotlin/net/corda/node/utilities/AppendOnlyPersistentMap.kt

@@ -309,6 +309,7 @@ abstract class AppendOnlyPersistentMapBase<K, V, E, out EK>(
 
 // Open for tests to override
 open class AppendOnlyPersistentMap<K, V, E, out EK>(
+        name: String,
         toPersistentEntityKey: (K) -> EK,
         fromPersistentEntity: (E) -> Pair<K, V>,
         toPersistentEntity: (key: K, value: V) -> E,
@@ -321,6 +322,7 @@ open class AppendOnlyPersistentMap<K, V, E, out EK>(
         persistentEntityClass) {
     //TODO determine cacheBound based on entity class later or with node config allowing tuning, or using some heuristic based on heap size
     override val cache = NonInvalidatingCache(
+            name = name,
             bound = cacheBound,
             loadFunction = { key: K ->
                 // This gets called if a value is read and the cache has no Transactional for this key yet.
@@ -353,6 +355,7 @@ open class AppendOnlyPersistentMap<K, V, E, out EK>(
 
 // Same as above, but with weighted values (e.g. memory footprint sensitive).
 class WeightBasedAppendOnlyPersistentMap<K, V, E, out EK>(
+        name: String,
         toPersistentEntityKey: (K) -> EK,
         fromPersistentEntity: (E) -> Pair<K, V>,
         toPersistentEntity: (key: K, value: V) -> E,
@@ -365,6 +368,7 @@ class WeightBasedAppendOnlyPersistentMap<K, V, E, out EK>(
         toPersistentEntity,
         persistentEntityClass) {
     override val cache = NonInvalidatingWeightBasedCache(
+            name,
             maxWeight = maxWeight,
             weigher = Weigher { key, value -> weighingFunc(key, value) },
             loadFunction = { key: K ->

node/src/main/kotlin/net/corda/node/utilities/NonInvalidatingCache.kt

@@ -4,18 +4,19 @@ import com.github.benmanes.caffeine.cache.CacheLoader
 import com.github.benmanes.caffeine.cache.Caffeine
 import com.github.benmanes.caffeine.cache.LoadingCache
 import com.github.benmanes.caffeine.cache.Weigher
+import net.corda.core.internal.buildNamed
 
 class NonInvalidatingCache<K, V> private constructor(
         val cache: LoadingCache<K, V>
 ) : LoadingCache<K, V> by cache {
 
-    constructor(bound: Long, loadFunction: (K) -> V) :
-            this(buildCache(bound, loadFunction))
+    constructor(name: String, bound: Long, loadFunction: (K) -> V) :
+            this(buildCache(name, bound, loadFunction))
 
     private companion object {
-        private fun <K, V> buildCache(bound: Long, loadFunction: (K) -> V): LoadingCache<K, V> {
+        private fun <K, V> buildCache(name: String, bound: Long, loadFunction: (K) -> V): LoadingCache<K, V> {
             val builder = Caffeine.newBuilder().maximumSize(bound)
-            return builder.build(NonInvalidatingCacheLoader(loadFunction))
+            return builder.buildNamed(name, NonInvalidatingCacheLoader(loadFunction))
         }
     }
 
@@ -32,13 +33,13 @@ class NonInvalidatingCache<K, V> private constructor(
 class NonInvalidatingWeightBasedCache<K, V> private constructor(
         val cache: LoadingCache<K, V>
 ) : LoadingCache<K, V> by cache {
-    constructor (maxWeight: Long, weigher: Weigher<K, V>, loadFunction: (K) -> V) :
-            this(buildCache(maxWeight, weigher, loadFunction))
+    constructor (name: String, maxWeight: Long, weigher: Weigher<K, V>, loadFunction: (K) -> V) :
+            this(buildCache(name, maxWeight, weigher, loadFunction))
 
     private companion object {
-        private fun <K, V> buildCache(maxWeight: Long, weigher: Weigher<K, V>, loadFunction: (K) -> V): LoadingCache<K, V> {
+        private fun <K, V> buildCache(name: String, maxWeight: Long, weigher: Weigher<K, V>, loadFunction: (K) -> V): LoadingCache<K, V> {
             val builder = Caffeine.newBuilder().maximumWeight(maxWeight).weigher(weigher)
-            return builder.build(NonInvalidatingCache.NonInvalidatingCacheLoader(loadFunction))
+            return builder.buildNamed(name, NonInvalidatingCache.NonInvalidatingCacheLoader(loadFunction))
         }
     }
 }

node/src/main/kotlin/net/corda/node/utilities/NonInvalidatingUnboundCache.kt

@@ -5,20 +5,21 @@ import com.github.benmanes.caffeine.cache.CacheLoader
 import com.github.benmanes.caffeine.cache.Caffeine
 import com.github.benmanes.caffeine.cache.LoadingCache
 import com.github.benmanes.caffeine.cache.RemovalListener
+import net.corda.core.internal.buildNamed
 
 class NonInvalidatingUnboundCache<K, V> private constructor(
         val cache: LoadingCache<K, V>
 ) : LoadingCache<K, V> by cache {
 
-    constructor(loadFunction: (K) -> V, removalListener: RemovalListener<K, V> = RemovalListener { _, _, _ -> },
+    constructor(name: String, loadFunction: (K) -> V, removalListener: RemovalListener<K, V> = RemovalListener { _, _, _ -> },
                 keysToPreload: () -> Iterable<K> = { emptyList() }) :
-            this(buildCache(loadFunction, removalListener, keysToPreload))
+            this(buildCache(name, loadFunction, removalListener, keysToPreload))
 
     private companion object {
-        private fun <K, V> buildCache(loadFunction: (K) -> V, removalListener: RemovalListener<K, V>,
+        private fun <K, V> buildCache(name: String, loadFunction: (K) -> V, removalListener: RemovalListener<K, V>,
                                       keysToPreload: () -> Iterable<K>): LoadingCache<K, V> {
             val builder = Caffeine.newBuilder().removalListener(removalListener).executor(SameThreadExecutor.getExecutor())
-            return builder.build(NonInvalidatingCacheLoader(loadFunction)).apply {
+            return builder.buildNamed(name, NonInvalidatingCacheLoader(loadFunction)).apply {
                 getAll(keysToPreload())
             }
         }

node/src/main/kotlin/net/corda/node/utilities/PersistentMap.kt

@@ -10,6 +10,7 @@ import java.util.*
  * Implements an unbound caching layer on top of a table accessed via Hibernate mapping.
  */
 class PersistentMap<K : Any, V, E, out EK>(
+        name: String,
         val toPersistentEntityKey: (K) -> EK,
         val fromPersistentEntity: (E) -> Pair<K, V>,
         val toPersistentEntity: (key: K, value: V) -> E,
@@ -21,6 +22,7 @@ class PersistentMap<K : Any, V, E, out EK>(
     }
 
     private val cache = NonInvalidatingUnboundCache(
+            name,
             loadFunction = { key -> Optional.ofNullable(loadValue(key)) },
             removalListener = ExplicitRemoval(toPersistentEntityKey, persistentEntityClass)
     )

node/src/test/kotlin/net/corda/node/services/persistence/AppendOnlyPersistentMapTest.kt

@@ -271,6 +271,7 @@ class AppendOnlyPersistentMapTest(var scenario: Scenario) {
     )
 
     class TestMap : AppendOnlyPersistentMap<Long, String, PersistentMapEntry, Long>(
+            "ApoendOnlyPersistentMap_test",
             toPersistentEntityKey = { it },
             fromPersistentEntity = { Pair(it.key, it.value) },
             toPersistentEntity = { key: Long, value: String ->

node/src/test/kotlin/net/corda/node/utilities/PersistentMapTests.kt

@@ -16,6 +16,7 @@ class PersistentMapTests {
     //create a test map using an existing db table
     private fun createTestMap(): PersistentMap<String, String, ContractUpgradeServiceImpl.DBContractUpgrade, String> {
         return PersistentMap(
+                "Test_test",
                 toPersistentEntityKey = { it },
                 fromPersistentEntity = { Pair(it.stateRef, it.upgradedContractClassName ?: "") },
                 toPersistentEntity = { key: String, value: String ->

serialization/src/main/kotlin/net/corda/serialization/internal/SerializationScheme.kt

@@ -6,6 +6,7 @@ import net.corda.core.DeleteForDJVM
 import net.corda.core.KeepForDJVM
 import net.corda.core.contracts.Attachment
 import net.corda.core.crypto.SecureHash
+import net.corda.core.internal.buildNamed
 import net.corda.core.internal.copyBytes
 import net.corda.core.serialization.*
 import net.corda.core.utilities.ByteSequence
@@ -76,7 +77,7 @@ data class SerializationContextImpl @JvmOverloads constructor(override val prefe
  */
 @DeleteForDJVM
 internal class AttachmentsClassLoaderBuilder(private val properties: Map<Any, Any>, private val deserializationClassLoader: ClassLoader) {
-    private val cache: Cache<List<SecureHash>, AttachmentsClassLoader> = Caffeine.newBuilder().weakValues().maximumSize(1024).build()
+    private val cache: Cache<List<SecureHash>, AttachmentsClassLoader> = Caffeine.newBuilder().weakValues().maximumSize(1024).buildNamed("SerializationScheme_attachmentClassloader")
 
     fun build(attachmentHashes: List<SecureHash>): AttachmentsClassLoader? {
         val serializationContext = properties[serializationContextKey] as? SerializeAsTokenContext ?: return null // Some tests don't set one.

tools/explorer/src/main/kotlin/net/corda/explorer/identicon/IdenticonRenderer.kt

@@ -14,6 +14,7 @@ import javafx.scene.image.WritableImage
 import javafx.scene.paint.Color
 import javafx.scene.text.TextAlignment
 import net.corda.core.crypto.SecureHash
+import net.corda.core.internal.buildNamed
 
 /**
  *  (The MIT License)
@@ -75,7 +76,7 @@ object IdenticonRenderer {
 
     private const val renderingSize = 30.0
 
-    private val cache = Caffeine.newBuilder().build(CacheLoader<SecureHash, Image> { key ->
+    private val cache = Caffeine.newBuilder().buildNamed("IdentIconRenderer_image", CacheLoader<SecureHash, Image> { key ->
         key.let { render(key.hashCode(), renderingSize) }
     })