V1 tests and fixes for the ContractConstraints work (corda#1739)

* V1 tests and fixes for the ContractConstraints work

* More fixes.

core/src/main/kotlin/net/corda/core/flows/FlowLogicRef.kt

@@ -24,16 +24,4 @@ class IllegalFlowLogicException(type: Class<*>, msg: String) : IllegalArgumentEx
  */
 // TODO: align this with the existing [FlowRef] in the bank-side API (probably replace some of the API classes)
 @CordaSerializable
-interface FlowLogicRef
-
-
-/**
- * This is just some way to track what attachments need to be in the class loader, but may later include some app
- * properties loaded from the attachments.  And perhaps the authenticated user for an API call?
- */
-@CordaSerializable
-data class AppContext(val attachments: List<SecureHash>) {
-    // TODO: build a real [AttachmentsClassLoader] etc
-    val classLoader: ClassLoader
-        get() = this.javaClass.classLoader
-}
+interface FlowLogicRef

finance/isolated/src/main/kotlin/net/corda/finance/contracts/isolated/IsolatedDummyFlow.kt

@@ -32,4 +32,4 @@ class IsolatedDummyFlow {
             stx.verify(serviceHub)
         }
     }
-}
+}

node/src/integration-test/kotlin/net/corda/node/services/AttachmentLoadingTests.kt

@@ -1,10 +1,12 @@
 package net.corda.node.services
 
 import net.corda.client.rpc.RPCException
+import net.corda.core.concurrent.CordaFuture
 import net.corda.core.contracts.Contract
 import net.corda.core.contracts.PartyAndReference
 import net.corda.core.cordapp.CordappProvider
 import net.corda.core.flows.FlowLogic
+import net.corda.core.flows.UnexpectedFlowEndException
 import net.corda.core.identity.CordaX500Name
 import net.corda.core.identity.Party
 import net.corda.core.internal.concurrent.transpose
@@ -16,12 +18,18 @@ import net.corda.core.transactions.TransactionBuilder
 import net.corda.core.utilities.OpaqueBytes
 import net.corda.core.utilities.getOrThrow
 import net.corda.core.utilities.loggerFor
+import net.corda.node.internal.StartedNode
 import net.corda.node.internal.cordapp.CordappLoader
 import net.corda.node.internal.cordapp.CordappProviderImpl
+import net.corda.node.services.transactions.SimpleNotaryService
 import net.corda.nodeapi.User
+import net.corda.nodeapi.internal.ServiceInfo
 import net.corda.testing.DUMMY_BANK_A
 import net.corda.testing.DUMMY_NOTARY
 import net.corda.testing.TestDependencyInjectionBase
+import net.corda.testing.driver.DriverDSL
+import net.corda.testing.driver.DriverDSLExposedInterface
+import net.corda.testing.driver.NodeHandle
 import net.corda.testing.driver.driver
 import net.corda.testing.node.MockServices
 import net.corda.testing.resetTestSerialization
@@ -30,6 +38,8 @@ import org.junit.Before
 import org.junit.Test
 import java.net.URLClassLoader
 import java.nio.file.Files
+import java.sql.Driver
+import kotlin.test.assertFails
 import kotlin.test.assertFailsWith
 
 class AttachmentLoadingTests : TestDependencyInjectionBase() {
@@ -45,6 +55,13 @@ class AttachmentLoadingTests : TestDependencyInjectionBase() {
         val logger = loggerFor<AttachmentLoadingTests>()
         val isolatedJAR = AttachmentLoadingTests::class.java.getResource("isolated.jar")!!
         val ISOLATED_CONTRACT_ID = "net.corda.finance.contracts.isolated.AnotherDummyContract"
+
+        val bankAName = CordaX500Name("BankA", "Zurich", "CH")
+        val bankBName = CordaX500Name("BankB", "Zurich", "CH")
+        val notaryName = CordaX500Name("Notary", "Zurich", "CH")
+        val flowInitiatorClass =
+                Class.forName("net.corda.finance.contracts.isolated.IsolatedDummyFlow\$Initiator", true, URLClassLoader(arrayOf(isolatedJAR)))
+                        .asSubclass(FlowLogic::class.java)
     }
 
     private lateinit var services: Services
@@ -75,40 +92,42 @@ class AttachmentLoadingTests : TestDependencyInjectionBase() {
     @Test
     fun `test that attachments retrieved over the network are not used for code`() {
         driver(initialiseSerialization = false) {
-            val bankAName = CordaX500Name("BankA", "Zurich", "CH")
-            val bankBName = CordaX500Name("BankB", "Zurich", "CH")
-            // Copy the app jar to the first node. The second won't have it.
-            val path = (baseDirectory(bankAName.toString()) / "plugins").createDirectories() / "isolated.jar"
-            logger.info("Installing isolated jar to $path")
-            isolatedJAR.openStream().buffered().use { input ->
-                Files.newOutputStream(path).buffered().use { output ->
-                    input.copyTo(output)
-                }
-            }
-
-            val admin = User("admin", "admin", permissions = setOf("ALL"))
-            val (bankA, bankB) = listOf(
-                    startNode(providedName = bankAName, rpcUsers = listOf(admin)),
-                    startNode(providedName = bankBName, rpcUsers = listOf(admin))
-            ).transpose().getOrThrow()   // Wait for all nodes to start up.
+            installIsolatedCordappTo(bankAName)
+            val (bankA, bankB, _) = createTwoNodesAndNotary()
 
-            val clazz =
-                    Class.forName("net.corda.finance.contracts.isolated.IsolatedDummyFlow\$Initiator", true, URLClassLoader(arrayOf(isolatedJAR)))
-                            .asSubclass(FlowLogic::class.java)
+            assertFailsWith<UnexpectedFlowEndException>("Party C=CH,L=Zurich,O=BankB rejected session request: Don't know net.corda.finance.contracts.isolated.IsolatedDummyFlow\$Initiator") {
+                bankA.rpc.startFlowDynamic(flowInitiatorClass, bankB.nodeInfo.legalIdentities.first()).returnValue.getOrThrow()
+            }
+        }
+    }
 
-            try {
-                bankA.rpcClientToNode().start("admin", "admin").use { rpc ->
-                    val proxy = rpc.proxy
-                    val party = proxy.wellKnownPartyFromX500Name(bankBName)!!
+    @Test
+    fun `tests that if the attachment is loaded on both sides already that a flow can run`() {
+        driver(initialiseSerialization = false) {
+            installIsolatedCordappTo(bankAName)
+            installIsolatedCordappTo(bankBName)
+            val (bankA, bankB, _) = createTwoNodesAndNotary()
+            bankA.rpc.startFlowDynamic(flowInitiatorClass, bankB.nodeInfo.legalIdentities.first()).returnValue.getOrThrow()
+        }
+    }
 
-                    assertFailsWith<RPCException>("net.corda.client.rpc.RPCException: net.corda.finance.contracts.isolated.IsolatedDummyFlow\$Initiator") {
-                        proxy.startFlowDynamic(clazz, party).returnValue.getOrThrow()
-                    }
-                }
-            } finally {
-                bankA.stop()
-                bankB.stop()
+    private fun DriverDSLExposedInterface.installIsolatedCordappTo(nodeName: CordaX500Name) {
+        // Copy the app jar to the first node. The second won't have it.
+        val path = (baseDirectory(nodeName.toString()) / "plugins").createDirectories() / "isolated.jar"
+        logger.info("Installing isolated jar to $path")
+        isolatedJAR.openStream().buffered().use { input ->
+            Files.newOutputStream(path).buffered().use { output ->
+                input.copyTo(output)
             }
         }
     }
+
+    private fun DriverDSLExposedInterface.createTwoNodesAndNotary(): List<NodeHandle> {
+        val adminUser = User("admin", "admin", permissions = setOf("ALL"))
+        return listOf(
+                startNode(providedName = bankAName, rpcUsers = listOf(adminUser)),
+                startNode(providedName = bankBName, rpcUsers = listOf(adminUser)),
+                startNode(providedName = notaryName, rpcUsers = listOf(adminUser), advertisedServices = setOf(ServiceInfo(SimpleNotaryService.type)))
+        ).transpose().getOrThrow()   // Wait for all nodes to start up.
+    }
 }

node/src/main/kotlin/net/corda/node/internal/AbstractNode.kt

@@ -57,10 +57,7 @@ import net.corda.node.services.persistence.DBTransactionStorage
 import net.corda.node.services.persistence.NodeAttachmentService
 import net.corda.node.services.schema.HibernateObserver
 import net.corda.node.services.schema.NodeSchemaService
-import net.corda.node.services.statemachine.FlowStateMachineImpl
-import net.corda.node.services.statemachine.StateMachineManager
-import net.corda.node.services.statemachine.appName
-import net.corda.node.services.statemachine.flowVersionAndInitiatingClass
+import net.corda.node.services.statemachine.*
 import net.corda.node.services.transactions.*
 import net.corda.node.services.upgrade.ContractUpgradeServiceImpl
 import net.corda.node.services.vault.NodeVaultService
@@ -190,7 +187,8 @@ abstract class AbstractNode(open val configuration: NodeConfiguration,
                     checkpointStorage,
                     serverThread,
                     database,
-                    busyNodeLatch)
+                    busyNodeLatch,
+                    cordappLoader.appClassLoader)
 
             smm.tokenizableServices.addAll(tokenizableServices)
 
@@ -213,6 +211,7 @@ abstract class AbstractNode(open val configuration: NodeConfiguration,
             registerCordappFlows()
             _services.rpcFlows += cordappProvider.cordapps.flatMap { it.rpcFlows }
             registerCustomSchemas(cordappProvider.cordapps.flatMap { it.customSchemas }.toSet())
+            FlowLogicRefFactoryImpl.classloader = cordappLoader.appClassLoader
 
             runOnStop += network::stop
             StartedNodeImpl(this, _services, info, checkpointStorage, smm, attachments, inNodeNetworkMapService, network, database, rpcOps)

node/src/main/kotlin/net/corda/node/services/statemachine/FlowLogicRefFactoryImpl.kt

@@ -2,6 +2,7 @@ package net.corda.node.services.statemachine
 
 import net.corda.core.internal.VisibleForTesting
 import com.google.common.primitives.Primitives
+import net.corda.core.cordapp.CordappContext
 import net.corda.core.flows.*
 import net.corda.core.serialization.CordaSerializable
 import net.corda.core.serialization.SingletonSerializeAsToken
@@ -17,7 +18,7 @@ import kotlin.reflect.jvm.javaType
  * The internal concrete implementation of the FlowLogicRef marker interface.
  */
 @CordaSerializable
-data class FlowLogicRefImpl internal constructor(val flowLogicClassName: String, val appContext: AppContext, val args: Map<String, Any?>) : FlowLogicRef
+data class FlowLogicRefImpl internal constructor(val flowLogicClassName: String, val args: Map<String, Any?>) : FlowLogicRef
 
 /**
  * A class for conversion to and from [FlowLogic] and [FlowLogicRef] instances.
@@ -32,6 +33,9 @@ data class FlowLogicRefImpl internal constructor(val flowLogicClassName: String,
  * in response to a potential malicious use or buggy update to an app etc.
  */
 object FlowLogicRefFactoryImpl : SingletonSerializeAsToken(), FlowLogicRefFactory {
+    // TODO: Replace with a per app classloader/cordapp provider/cordapp loader - this will do for now
+    var classloader = javaClass.classLoader
+
     override fun create(flowClass: Class<out FlowLogic<*>>, vararg args: Any?): FlowLogicRef {
         if (!flowClass.isAnnotationPresent(SchedulableFlow::class.java)) {
             throw IllegalFlowLogicException(flowClass, "because it's not a schedulable flow")
@@ -73,17 +77,14 @@ object FlowLogicRefFactoryImpl : SingletonSerializeAsToken(), FlowLogicRefFactor
      */
     @VisibleForTesting
     internal fun createKotlin(type: Class<out FlowLogic<*>>, args: Map<String, Any?>): FlowLogicRef {
-        // TODO: we need to capture something about the class loader or "application context" into the ref,
-        //       perhaps as some sort of ThreadLocal style object.  For now, just create an empty one.
-        val appContext = AppContext(emptyList())
         // Check we can find a constructor and populate the args to it, but don't call it
         createConstructor(type, args)
-        return FlowLogicRefImpl(type.name, appContext, args)
+        return FlowLogicRefImpl(type.name, args)
     }
 
     fun toFlowLogic(ref: FlowLogicRef): FlowLogic<*> {
         if (ref !is FlowLogicRefImpl) throw IllegalFlowLogicException(ref.javaClass, "FlowLogicRef was not created via correct FlowLogicRefFactory interface")
-        val klass = Class.forName(ref.flowLogicClassName, true, ref.appContext.classLoader).asSubclass(FlowLogic::class.java)
+        val klass = Class.forName(ref.flowLogicClassName, true, classloader).asSubclass(FlowLogic::class.java)
         return createConstructor(klass, ref.args)()
     }
 

node/src/main/kotlin/net/corda/node/services/statemachine/StateMachineManager.kt

@@ -79,7 +79,8 @@ class StateMachineManager(val serviceHub: ServiceHubInternal,
                           val checkpointStorage: CheckpointStorage,
                           val executor: AffinityExecutor,
                           val database: CordaPersistence,
-                          private val unfinishedFibers: ReusableLatch = ReusableLatch()) {
+                          private val unfinishedFibers: ReusableLatch = ReusableLatch(),
+                          private val classloader: ClassLoader = javaClass.classLoader) {
 
     inner class FiberScheduler : FiberExecutorScheduler("Same thread scheduler", executor)
 
@@ -380,7 +381,12 @@ class StateMachineManager(val serviceHub: ServiceHubInternal,
             updateCheckpoint(fiber)
             session to initiatedFlowFactory
         } catch (e: SessionRejectException) {
-            logger.warn("${e.logMessage}: $sessionInit")
+            // TODO: Handle this more gracefully
+            try {
+                logger.warn("${e.logMessage}: $sessionInit")
+            } catch (e: Throwable) {
+                logger.warn("Problematic session init message during logging", e)
+            }
             sendSessionReject(e.rejectMessage)
             return
         } catch (e: Exception) {
@@ -403,7 +409,7 @@ class StateMachineManager(val serviceHub: ServiceHubInternal,
 
     private fun getInitiatedFlowFactory(sessionInit: SessionInit): InitiatedFlowFactory<*> {
         val initiatingFlowClass = try {
-            Class.forName(sessionInit.initiatingFlowClass).asSubclass(FlowLogic::class.java)
+            Class.forName(sessionInit.initiatingFlowClass, true, classloader).asSubclass(FlowLogic::class.java)
         } catch (e: ClassNotFoundException) {
             throw SessionRejectException("Don't know ${sessionInit.initiatingFlowClass}")
         } catch (e: ClassCastException) {