* CORDA-3715: When loading cordapps now check that contract classes have class version between 49 and 52
* CORDA-3715: Now check class version when contract verification takes place.
* CORDA-3715: Making detekt happy with number of levels in func
* CORDA-3715: Make use of new ClassGraph release which provides class file major version number.
* CORDA-3715: Changed package name in test jars
* CORDA-3715: Use ClassGraph when loading attachments.
* CORDA-3715: Reverted file to 4.5 version
* CORDA-3715: Updating method to match non deterministic version.
* CORDA-3715: Added in default param.
* CORDA-3715: Adjusted min JDK version to 1.1
* CORDA-3715: Switching check to JDK 1.2
* CORDA-3715: Now version check SerializationWhitelist classes.
* CORDA-3715: Switched default to null for range.
* CORDA-3291 `isKilled` flag and session errors for killed flows
## Summary
Two major improvements have been worked on:
- A new flag named `isKilled` has been added to `FlowLogic` to allow
developers to break out of loops without suspension points.
- Killed flows now send session errors to their counter parties allowing
their flows to also terminate without further coordination.
Achieving these changes required a __fundamental__ change to how flows are
killed as well as how they sleep.
## `isKilled` flag
The addition of `FlowLogic.isKilled` allows flows to check if the
current flow has been killed. They can then throw an exception to lead
to the flow's termination (following the standard error pathway). They
can also perform some extra logic or not throw an exception if they
really wanted to.
No matter what, once the flag is set, the flow will terminate. Due to
timing, a killed flow might successfully process its next suspension
event, but it will then process a killed transition and terminate.
## Send session errors when killing a flow
A flow will now send session errors to all of its counter parties. They
are transferred as `UnexpectedFlowEndException`s. This allows initiated
flows to handle these errors as they see fit, although they should
probably just terminate.
## How flows are killed
### Before
Originally we were relying on Quasar to interrupt a flow's fiber, we
could then handle the resulting `InterruptedException`. The problem with
this solution is that it only worked when a flow was already suspended
or when a flow moved into suspension. Flows stuck in loops did not work.
### After
We now *do not* use Quasar to interrupt a flow's fiber. Instead, we
switch `FlowStateMachine.isKilled` to true and schedule a new event.
Any event that is processed after switching this flag will now cause a
`KilledFlowTransition`. This transition follows similar logic to how
error propagation works. Note, the extra event allows a suspended flow
to be killed without waiting for the event that it was _really_ waiting
for.
This allows a lot of the tidy up code in `StateMachineManager.killFlow`
to be removed as tidy up is executed as part of removing a flow.
Deleting a flow's checkpoint and releasing related soft locks is still
handled manually in case of infinite loops but also triggered as part
of the actions executed in a transition.
This required flow sleeping to be changed as we no longer rely on
quasar.
## How flows now sleep
The reliance on Quasar to make a flow sleep has been removed.
Instead, when a flow sleeps we create a `ScheduledFuture` that is
delayed for the requested sleep duration. When the future executes it
schedules a `WakeUpFromSleep` event that wakes up the flow... Duh.
`FlowSleepScheduler` handles the future logic. It also uses the same
scheduled thread pool that timed flows uses.
A future field was added to `StateMachineState`. This removes the
need for concurrency control around flow sleeps as the code path does
not need to touch any concurrent data structures.
To achieve this:
- `StateMachineState.future` added as a `var`
- When the `ScheduledFuture` is created to wake up the flow the passed
in `StateMachineState` has its `future` value changed
- When resumed `future` and `isWaitingForFuture` are set to `null` and
`false` respectively
- When cancelling a sleeping flow, the `future` is cancelled and nulled
out. `isWaitingForFuture` is not changed since the flow is ending anyway
so really the value of the field is not important.
* CORDA-3722 withEntityManager can rollback its session
## Summary
Improve the handling of database transactions when using
`withEntityManager` inside a flow.
Extra changes have been included to improve the safety and
correctness of Corda around handling database transactions.
This focuses on allowing flows to catch errors that occur inside an
entity manager and handle them accordingly.
Errors can be caught in two places:
- Inside `withEntityManager`
- Outside `withEntityManager`
Further changes have been included to ensure that transactions are
rolled back correctly.
## Catching errors inside `withEntityManager`
Errors caught inside `withEntityManager` require the flow to manually
`flush` the current session (the entity manager's individual session).
By manually flushing the session, a `try-catch` block can be placed
around the `flush` call, allowing possible exceptions to be caught.
Once an error is thrown from a call to `flush`, it is no longer possible
to use the same entity manager to trigger any database operations. The
only possible option is to rollback the changes from that session.
The flow can continue executing updates within the same session but they
will never be committed. What happens in this situation should be handled
by the flow. Explicitly restricting the scenario requires a lot of effort
and code. Instead, we should rely on the developer to control complex
workflows.
To continue updating the database after an error like this occurs, a new
`withEntityManager` block should be used (after catching the previous
error).
## Catching errors outside `withEntityManager`
Exceptions can be caught around `withEntityManager` blocks. This allows
errors to be handled in the same way as stated above, except the need to
manually `flush` the session is removed. `withEntityManager` will
automatically `flush` a session if it has not been marked for rollback
due to an earlier error.
A `try-catch` can then be placed around the whole of the
`withEntityManager` block, allowing the error to be caught while not
committing any changes to the underlying database transaction.
## Savepoints / Transactionality
To make `withEntityManager` blocks work like mini database transactions,
save points have been utilised. A new savepoint is created when opening
a `withEntityManager` block (along with a new session). It is then used
as a reference point to rollback to if the session errors and needs to
roll back. The savepoint is then released (independently from
completing successfully or failing).
Using save points means, that either all the statements inside the
entity manager are executed, or none of them are.
## Some implementation details
- A new session is created every time an entity manager is requested,
but this does not replace the flow's main underlying database session.
- `CordaPersistence.transaction` can now determine whether it needs
to execute its extra error handling code. This is needed to allow errors
escape `withEntityManager` blocks while allowing some of our exception
handling around subscribers (in `NodeVaultService`) to continue to work.
* [EG-503] Spent state audit tool
Fixes
* Refinements to notary query interfaces. Feature complete.
* EG-503: Introduce optional `notaryService` in `ServiceHubCoreInternal`
* Remove redundant logic following change to use extensions API
Co-authored-by: Viktor Kolomeyko <viktor.kolomeyko@r3.com>
* CORDA-3696: Temporary update to enable JDK11 build and test. Will eventually be switchable.
* CORDA-3696: Filter out the Nashorn warning.
* CORDA-3696: Add JDK11 classifier.
* CORDA-3696: Updated match string to cope with JDK11.
* CORDA-3696: Filtering out SPHINCS256_SHA256 where failing due to JDK11.
* CORDA-3696: Now remove SPHINCS256_SHA256 only if JDK11.
* CORDA-3696: Fix test failure - switch to regex matching.
* CORDA-3696: Hide the illegal access warnings.
* CORDA-3696: Check for Java11 when disabling Java11 warnings.
* CORDA-3696: Fix unneccessary non null check.
* CORDA-3696: Reverting build env to JDK8
* CORDA-3696: Revert hiding of illegal access warnings via Unsafe class.
* CORDA-3696: Remove internal access warnings and new JDK11 version checker.
* CORDA-3696: Updated build file for OS
* CORDA-3696: Removed typo
* CORDA-3696: Fixed space typo.
* CORDA-3696: Open modules to remove the illegal access warnings.
Co-authored-by: Adel El-Beik <adelel-beik@19LDN-MAC108.local>
* ENT-4967: Require no classifier for corda-node-djvm, corda-deserializers-djvm.
* Also remove classifiers from core, serialization and finance-contracts.
* Compile corda-serialization-djvm for Java 8 and remove its classifier.
* CORDA-3690: Changed algorithm name used in signature from ECDSA to EC. JDK11 checks with in key generation.
* CORDA-3690: Remove the SHA512WITHSPHINCS256 signature scheme from the generate key pair and sign test.
* CORDA-3690: Algorithm in SignatureScheme has changed to EC from ECDSA so change test to match.
Co-authored-by: Adel El-Beik <adelel-beik@19LDN-MAC108.local>
* Stop capturing 'FlowLogic' references in flowAsyncOperation;
Creating concrete classes removes the implicit reference to FlowLogic (as this) being included in the anonymous object
* Modify test code so that lambdas no longer get implicit references to their enclosing 'FlowLogic'
* Stop capturing 'FlowLogic' references in flowAsyncOperation;
Creating concrete classes removes the implicit reference to FlowLogic (as this) being included in the anonymous object
* Modify test code so that lambdas no longer get implicit references to their enclosing 'FlowLogic'
* CORDA-3668: Prevent AttachmentURLConnection from assigning ALL_PERMISSIONS to classes inside an attachment.
* Strengthen the comment warning about AttachmentURLConnection.getPermission.
* CORDA-3596 Record flow metadata
Record flow metadata during the zero'th checkpoint that occurs before
calling the flow's `call` function.
This required adding an RPC call's arguments to the `InvocationContext`
that gets created. These arguments are then accessible within the
statemachine and from the `Checkpoint` class. The arguments are then
extracted when recording a flow's metadata inside of
`DBCheckpointStorage`.
Updated the size of the started by column to 128 since it was not long
enough to hold the fully qualified class of a service that started a
flow.
* CORDA-3596 Remove arguments from in-memory checkpoint
When executing a flows first real suspend (from flow code) the arguments
contained in the `InvocationContext` are removed. This saves holding
these arguments for the whole lifecyle of a flow.
* CORDA-3596 Increase `cordapp_name` column to 128
* CORDA-3596 Join metadata by `flow_id`
Due to changes in where metadata is recorded, there is no need for
having `invocation_id` as the metadata table's primary key. The
`flow_id` is now the primary key of the table and is used to join to the
main checkpoints table.
The `invocation_id` has been removed from the checkpoints table since it
is not needed for the join anymore.
* CORDA-3596 Remove `received_time` from metadata table
* CORDA-3596 Remove unused `StartReason` enum
* CORDA-3596 Simple `DBCheckpointStorageTests` for metadata
* CORDA-3596 Truncate really long flow names
* [CORDA-3628] - Implement sendAll API
* detekt
* Some minor refactorings and docs
* Eliminate warnings
* Address Rick's comments
* Switch sendAll to use a set
* Remove unused dependencies from test-common
* Explicit imports and formatting
* Add core-test-utils project
* Add dependency
* Move Kryo serialization context to node-api (not serialization as we do not want to pull kryo into the serialization lib)
* Move AMQP server serialization scheme to node api
* Move serialization tests to node-api
* Move internal test helpers without further dependencies.
* Move out some types from RPCClientProxyHandler to node-api in preparation for moving the AMQP scheme
* Move client AMQP context to node-api so we can move the test serialization rule out.
* Move InternalSerializationTestHelpers to core-test-utils
* Moved testing.core to core-test-utils
* Make detekt happy
* Add api-scanner to core-test-utils
* Remove inlined package names introduced by IntelliJ refactoring
* Update api-current.txt to account for reordering.
* Add core-test-utils to list of published artifacts.
* Add missing import
* Location of things in api text has moved again (publish name of artefact?)
* Revert all additions to the API, leaving just the reordering
* Code review: fix up core-test-utils build.gradle and introduce kryo version constant.
* Remove OpenSsl flag from ssl config stub (can't be used from node-api)
* Suppress detekt warning
* Move core test util tests to the right module
* Expose kotlin test as a transient dependency - projects have come to rely on that.
* Fix typo in package name
* CORDA-3484: Now cope with 2 contract jars with same hash but different name, we just select one and use that.
* ENT-3584: Contract jars are now generated on the fly.
* CORDA-3584: Reverted changes to CordappProviderImpl. Exception is raised if node started with multiple jars with same hash.
* ENT-3584: Fixing test failure.
* CORDA-3584: Switch to test extension method instead of reflection to access internal member.
* ENT-3584: Address review comment. Dont fully qualify exception.
* CORDA-3584: Address review comment and converted lazy to a resettable one.
* CORDA-3584: Removed unused logger.
* CORDA-3584: Fixed visibility.
* CORDA-3584: Removed synchronized
* CORDA-3584: Removed CordappResolver
* CORDA-3584: Reverted change in gradle file and fixed test.
* CORDA-3584: Removed V3 from test description as it wasn't actually V3 specific.
* CORDA-3584: Address review comment. Let classes be garbage collected.
* Throw SQLException or PersistenceException plain, that may come out of an unsafe subscriber
* Add explanatory comment about why we changed Observer.tee to use unsafe subscribe
* Introducing not unsubscribing version of Rx.Subscriber
* Wrap PublishSubjects with FlowSafeSubjects in all tests that test Observer.tee
* Minor code formatting
* Make rawUpdates Rx.Observers not unsubscribe when accessed from CordaServices - Do not allow rawUpdates subscribing from flows
* Warning fix: Add else block to when statement
* Revert "Wrap PublishSubjects with FlowSafeSubjects in all tests that test Observer.tee"
This reverts commit e419af86
* Correcting log message
* Improve log message
* Add fiber's id to log message and exception message
* Added test, asserting FlowSafeSubscriber is alive and re-accessed upon flow retry
* Logging flow name instead of flow id at VaultService.rawUpdates subscribing error
* Add kdoc to OnNextFailedException
* Minor text correction
* Update kdocs of FlowSafeSubject/ PreventSubscriptionsSubject
* Moved FlowSafeSubject under package node.internal as it is only used by NodeVaultService
* Add comment and update kdoc explaining how to subscribe with SafeSubscriber to FlowSafeSubject
* Change PreventSubscriptionsSubject#errorAction to be more specific; to return an Exception
* Minor text update
* Update messy comment
* Replace assertThat with assertEquals
* Splitting heartBeat to heartBeat1 and hearBeat2 for more clear asserting
* Correcting comment
* Update messy comment
* Splitting heartBeat into heartBeatOnNext and heartBeatOnError
* Update test name
* Add explanatory comment to test
* Update test name
* Update test and add test comment
* Moving NotarisedTxs from SendStateFlow to VaultObserverExceptionTest inside NodeHandle.getNotarisedTransactionIds
* Moving SubscribingRawUpdatesFlow from ErrorHandling to VaultObserverExceptionTest
* Update kdoc of FlowSafeSubscriber and FlowSafeSubscriber.onNext
* Make kdoc more clear
* Throw exception upon accessing VaultService.rawUpdates from within a flow
* Changing exception thrown when accessing VaultService.rawUpdates from within a flow to a CordaRuntimeException
* Minor kdoc update
* Update test comment
* Update kdoc of FlowSafeSubscriber
* Introducing Observable.flowSafeSubscribe public API method to subscribe with -non unsubscribing- Rx.Subscribers to Observables. It also replaced FlowSafeSubject
* Move CustomSafeSubscriber outside test methods
* Minor text update
* Add timeout to tests
* Update kdoc of flowSafeSubscribe
* Update kdoc of flowSafeSubscribe
* Update kdoc of flowSafeSubscribe
* Move FlowSafeSubscriber and flowSafeSubscribe under their own package
* Fix detekt issue
* Update Detekt baseline
* Revert "Update Detekt baseline"
This reverts commit 793a8ed9
* Fix Detekt issue
* Moved strictMode flag from flowSafeSubscribe to OnFlowSafeSubscribe
Moved OnFlowSafeSubscribe into internal package
Integration tested flowSafeLooseSubscribe
* Suppress Rx Deprecation
* Rename flowSafeSubscribe to flowSafeObservable
* Renaming flowSafeObservable to continueOnError and FlowSafeSubscriber to ResilientSubscriber
* [NOTICK] Add a custom detekt rule for tests with no timeout, and fix remaining missing timeouts
* [NOTICK] Add a test for custom detekt rules and tidying
* add timeout annotation to new test
Co-authored-by: Stefano Franz <roastario@gmail.com>
* Make tee not wrap PublishSubjects in SafeSubscribers, otherwise a non Rx exception from an unsafe observer shuts down all other observers under the same PublishSubject
* Throw SQLException or PersistenceException plain, that may come out of an unsafe subscriber
* Revert "Throw SQLException or PersistenceException plain, that may come out of an unsafe subscriber"
This reverts commit c7b8af3fa6.
* Update Detekt baseline
Deprecate FlowAsyncOperation and reimplement public versions FlowExternalOperation and FlowExternalAsyncOperation.
await added to FlowLogic to allow easy calling from both Java and Kotlin. There are two overrides of await (one for FlowExternalOperation and FlowExternalAsyncOperation).
Implementations of FlowExternalOperation return a result (written as blocking code) from their execute function. This operation will then be executed using a thread provided by the externalOperationExecutor.
Implementations of FlowExternalAsyncOperation return a future from their execute function. This operation must be executed on a newly spawned thread or one provided by a thread pool. It is up to developers to handle threading in this scenario.
The default thread pool (externalOperationExecutor) can be configured through the flowExternalOperationThreadPoolSize node config.
The current implementation leaves FlowAsyncOperation alone, meaning that any developers that have used it (even though it is internal) won't need to change their apps. If this was not concern I would delete it completely and replumb the state machine code. Instead, it has been marked with @DoNotImplement and executeAsync is annotated with @Deprecated
* CORDA-2942: Port minimal set of changes to make lifecycle events work
... and make codebase compile.
* CORDA-2942: Undo some changes which are not strictly speaking necessary
* CORDA-2942: Make `NodeServicesContext` leaner and delete `extensions-api` module
* CORDA-2942: Reduce even more number of files affected
* CORDA-2942: Integration test fix
* CORDA-2942: Make events `AfterStart` and `BeforeStop` generic w.r.t. `NodeServicesContext`
* CORDA-2942: `NodeLifecycleObserverService` and a set of integration tests.
Public API violations are expected as well as integration tests failing.
* CORDA-2942: Re-work to introduce `ServiceLifecycleObserver`
* CORDA-2942: Explicitly mention a type of exception that may be thrown for some events.
* CORDA-2942: Register `ServiceLifecycleObserver` through `AppServiceHub`
* CORDA-2942: Fix integration test + KDocs update
* CORDA-2942: Detekt and `api-current` update
* CORDA-2942: Improvement to `CordaServiceLifecycleFatalTests`
... or else it has side effects on other tests.
* CORDA-2942: Add an integration test for new API use in Java
Driver test is written in Kotlin, but services definition is written in Java.
Also KDocs improvements.
* CORDA-2942: Documentation and release notes update
* CORDA-2942: First set of changes following review by @mnesbit
* CORDA-2942: Second set of changes following review by @mnesbit
* CORDA-2942: Added multi-threaded test
* CORDA-2942: Fixes
* CORDA-2942: Undo changes to `api-current.txt`
* CORDA-2942: Bare mimimum change to `api-current.txt` for CI gate to pass.
* CORDA-2942: Address review feedback from @rick-r3
* CORDA-2942: Detekt update
* CORDA-2942: Delete `ServiceLifecycleObserverPriority` and replace it with `Int` after discussion with @mnesbit
* CORDA-2942: Introduce more `NodeLifecycleEvent` and switch services to listen for those events
* CORDA-2942: Few more changes after input from @rick-r3
* First stub on integration test
Unfinished - hang on issue and pay
* CORDA-2942: Switch to use out-of-process nodes for the inetgration test
Currently Alice and Notary stuck waiting to hear from each other.
* CORDA-2942: Extra log lines during event distribution
* CORDA-2942: Asynchronously distribute lifecycle events
* CORDA-2942: Await for complete P2P client start-up
Next step: Add vault query to integration test
* CORDA-2942: Asynchronously distribute lifecycle events
Next step: Improve integration test
* CORDA-2942: Fix test broken by recent changes and improve logging
* CORDA-2942: Improvement of the test to be able to monitor actions performed by @CordaService in the remote process
* CORDA-2942: Add node re-start step to the integration test
* CORDA-2942: Remove `CORDAPP_STOPPED` event for now
* CORDA-2942: s/CORDAPP_STARTED/STATE_MACHINE_STARTED/
* CORDA-2942: Inverse the meaning of `priority` as requested by @rick-r3
* CORDA-2942: Register `AppServiceHubImpl` for lifecycle events and put a warning when SMM is not ready.
* Do not register cordapp custom serialisers when using attachment classloader.
* Record the URLs of CorDapp JARs that contain custom serialisers. Include these JARs as extra attachments if we discover that we're missing a custom serialiser during transaction verification.
* Check for disabled serializer when explicitly requesting a custom serializer.
Refactor test case to force use of a custom serializer.
* Tidy up basic custom serializer test.
* Also test that TransactionBuilder rejects missing custom serializers.
* Remove test whitelists, which should not be needed with custom serialisers.
* Add changelog entry. Also align TestCordappImpl.findRoots() with OS backports.
* Second approach based around CorDapps inside AttachmentStorage - report missing type descriptor or any non-composable types.
* Initial implementation of Corda-Fixup rules inside a CorDapp jar.
* Replace original "automatic attachment fixing" mechanism completely.
* First review comments: restore "missing class" logic to TransactionBuilder.
* Restore "missing class" mechanism as fallback for SignedTransaction too.
* [CORDA-3436] Allow CorDapps access to node diagnostic information
* [CORDA-3436] Fix API breakages
* [CORDA-3436] Improve documentation around diagnostics service
* [CORDA-3436] Remove CorDapps from the diagnostics information
* [CORDA-3436] Silence detekt warning
* modify CollectSignaturesFlow.kt to allow multiple collections from wellKnown party initiated sessions
* detekt fixes
* review comments
* move require lambdas back outside of the function definition of requires
* address review comments
* fix detekt
* fix api scanner
* ENT-4382: Move `InvocationHandlerTemplate` into `core`
This is an internal helper which is general enough and does not have any Node specific code.
* ENT-4382: Make @CordaInternal applicable to classes
And apply it on `AttachmentTrustCalculator` which is `core/internal` interface anyway.
* Introducing a new type of exception and a new hospital staff member to pause flows by immediately hospitalising them.
* Renaming exception to "HospitalizeFlowException".
* Making HospitalizeFlowException an open class.
* Overloading constructors of HospitalizeFlowException to be available in Java.
* Using Throwable#mentionsThrowable.
* Moving HospitalizeFlowException in its own file.
* Update kdocs for HospitalizeFlowException and StaffedFlowHospital#SedationNurse.
* Added tests, testing various HospitalizeFlowException types thrown.
* Fix Detekt issues.
* Imports optimizing.
* Add safe casting.
* Update api-flows and node-flow-hospital docs.
* Minor code comment change.
* Add DOCSTART-DOCEND signs in HospitalizeFlowException for makeDocs. It is referenced by api-flows.rst.
* Minor change in note.
* Code formatting.
* Remove comment.
* Remove if statement that makes example worse.
* Remove redundant comment.
* Moving 'Internal Corda errors' at the bottom.
* Changing node-flow-hospital.rst as per review.
* Change HospitalizeFlowException description as per review.
* Adding an example for FlowException.
* Minor indentation fix.
* Update FlowException example label as per review.
* Correcting handling of custom exception.
* Harmonize serialization/core and deterministic counterparts
* Fix test for changed private alias key behaviour
* Detekt errors
* roll back project.xml
* CORDA-3471: Create `CordaTransactionSupport` and use wherever possible instead of `CordaPersistence`
* CORDA-3471: Address comments by @mnesbit
- Relocate `CordaTransactionSupport` to `core`
- Create a lighter version of transaction - `VaultTransaction` that gives access to `session` object only.
* CORDA-3471: More changes after discussion with @mnesbit
- Rename `VaultTransaction` into `SessionScope`.
* CORDA-3471: Revert changes to most of the files after conversation with @mnesbit and @rick-r3
* CORDA-3471: Introduce `CordaTransactionSupportImpl` and make it accessible via `AppServiceHub`.
* CORDA-3471: Minor change (comment).
* CORDA-3471: Address input from @mnesbit
* CORDA-3471: Address input from @rick-r3
* CORDA-3471: Make Detekt happier
* CORDA-3471: Add a new test that proves transactions can be started from client threads
As requested by @mnesbit
* CORDA-3471: Change log and documentation update.
As requested by @mnesbit
* CORDA-3464: Also scan attachment:// URLs for custom serializers.
* Only scan the given classloader - ignore this classloader's parents.
* Upgrade to ClassGraph 4.8.58 - for "robustness fixes".
* Register the attachment:// URL scheme using AttachmentsClassLoader.
* Add integration test for custom serializer in contract state.
* Rename Currancy -> Currantsy, just to make the point.
* CORDA-2876: Add explicit Kotlin dependencies to DJVM serialization modules.
* Publish slf4j-api at compile scope for corda-core-deterministic.
* Bump Corda platform version to 6.
* * CORDA-2876: Migrate DJVM serialization modules into Corda.
* Pre-generate Corda classes for DJVM sandbox when node boots in production mode.
* Ensure that all DJVM test contract CorDapps are signed.
* Test examining attachments within DJVM sandbox.
* Test Contract.verify() using cryptographic verify function.
* Add test cases for more non-determinism in Contract.verify().
* Update node-driver to support testing nodes with DJVM support.
* Modify Node to allow alternative DJVM configurations for testing.
* Refactor DeterministicVerifierFactoryService for default use-case.
* Small whitespace and code-style refactors.
* Create and activate a DJVM execution profile for the Node.
* Revert making Verifier implement AutoCloseable.
* Allow the node to cache sandboxed Corda byte-code for reuse.
* Use updated Quasar agent that knows not to touch DJVM classloaders.
* Fix Quasar's package exclusions globs for DJVM.
* Deserialise LedgerTransaction into the sandbox for Contract.verify().
* Add the DJVM's serialisation modules to the Corda node.
* Update the node for the latest DJVM API, and preserve the ConstructorForDeserialization annotation on user contract classes.
* Add corda-dev to repositories while DJVM is SNAPSHOT.
* Migrate DJVM specialisation into AbstractNode's ServiceHubInternalImpl.
* Exclude sandbox.** and shaded djvm.** classes from Quasar agent.
* Add the corda-dev repository to :node for the deterministic runtime.
* Turn Verifier into an abstract base class that is specialised by BasicVerifier and DeterministicVerifier.
* Add the Corda deterministic libraries to the Node, and split the DJVM sandbox across two SandboxClassLoader instances.
* Add DJVM to contract verification path inside Corda Node.
* Minor lambda simplifications and removing unused import.
* CORDA-2871: Remove @CordaSerializable from LedgerTransaction.
* CORDA-2871: Add a callback to ServicesForResolution to allow the Node to modify a LedgerTransaction object.
* CORDA-2871: Refactor the contract verification code into a separate class,
and allow LedgerTransaction to choose different Verifier objects.
* Update DJVM to use Corda 4.4-SNAPSHOT. (#95)
* CORDA-3330: Allow DJVM to preload / pregenerate classes from selected jars. (#92)
* Add support for SourceClassLoader.getResources() to DJVM.
* Allow a SandboxConfiguration to preload sandbox byte-code for all classes inside jars containing META-INF/DJVM-preload.
* CORDA-3309: Remove explicit try-catch in favour of UncaughtExceptionHandler. (#91)
* CORDA-3309: Install UncaughtExceptionHandler for DJVM tasks. (#88)
* Fix tests broken by Windows line endings. (#82)
* CORDA-3292: Reimplement ExecutionProfile as a data class. (#80)
* CORDA-2877: Refactor how we create child SandboxConfiguration objects. (#76)
* CORDA-2877: Load bytecode from a persistent cache to prevent repeated rewriting. (#75)
* Refactor byte-code cache to SandboxConfiguration instead of AnalysisConfiguration. We cannot "mix and match" byte-code generated by different sets of rules.
* CORDA-3137: Enhance annotation handling so that we can allow some annotations to be mapped into the sandbox without also needing to be stitched. (#72)
* CORDA-2871: Minor cosmetic fixes. (#69)
* CORDA-3218: Align DJVM with internal Corda Serialisation API. (#68)
* Ensure we get the latest SNAPSHOT of the serialisation code.
* CORDA-2871: Refactor SourceClassLoader to define source classes. (#66)
* Rewrite SourceClassLoader to support parent/child relationships.
* Revert catching TypNotPresebtException - it was a symptom of a bigger problem.
* Remove AutoCloseable from AnalysisConfiguration and SourceClassLoader.
* SourceClassLoader.getResource() must delegate to its parent first.
* CORDA-2871: Ensure ClassLoader.loadClass() throws ClassNotFoundException for all cases where the class cannot be found. (#64)
* CORDA-2871: Modify sandbox tasks to implement both java.Function and sandbox.Function (#62)
* Make TaskExecutors implement BiFunction to make them composable.
* Create ImportTask to wrap a java.Function inside a sandbox.Function.
* Add createExecutor() and createRawExecutor() APIs to SandboxClassLoader.
* Update serialization to use SandboxClassLoader.toSandboxClass().
* Remove a layer of lambdas from the serialisation code.
* Update SandboxExecutor and SandboxRawExecutor.
* Rename Executor to TaskFactory.
* Rename dangling executor -> taskFactory.
* CORDA-2871: Sanity fixes! (#63)
* Improve message for SandboxClassLoadingException.
* Fix serialisation API for using sandboxed environment.
* CORDA-3174: Extend serialisation to include InputStream and OpaqueBytesSubSequence. (#60)
* Update DJVM Example project for serialisation.
* Add serializers for InputStream and OpaqueBytesSubSequence.
* Support ZIP Inflater and CRC32 inside the sandbox.
* Allow the DJVM to wrap java.io.InputStream as sandbox.java.io.InputStream.
* Configure tests also to preserve @DeprecatedConstructorForDeserialization.
* CORDA-3174: Implement Corda serialization modules. (#59)
* Create DJVM serialization modules.
* Create test cases for Array<T>, List<T> and List<Array<T>>.
* Refactor SandboxPrimiveSerializer for all primitive types.
* Implement SandboxCollectionSerializer to support Collection types.
* Implement SandboxMapSerializer to support Map types.
* Attempt to fix infinite loop when computing Collection and Map fingerprints.
* Apply special handling when deserialising sandbox.java.lang.Character.
* Remap Java primitive types to sandbox Java object types to deter evolution.
* Use Class.getPackage().getName() to determine sandbox package name.
* Implement SandboxEnumSerializer to support Enum types.
* Implement SandboxPublicKeySerializer to support Java security keys.
* Add serialization projects to the composite example project.
* Implement serializers for BigInteger, BigDecimal, Currency and StringBuffer.
* Test that deserialising does not instantiate the untrusted user classes.
* Implement serializers for java.time.* types.
* Add serialiser for BitSet - currently disabled until BitSet itself is supported.
* Add serialisers for EnumSet and Class.
* Include support for EnumMap in the SandboxMapSerializer.
* Ensure the DJVM Example project's tests preserve @CordaSerializable.
* Add support for UUID as a primitive type.
* Use common abortReadOnly() method for declaring serialization as unsupported.
* Streamline the API for deserialising into the sandbox.
* Add preliminary support for deserialising X.509 certificates.
* Implement serializer for java.util.Optional.
* Refactor configuration of the sandbox serialization scheme.
* Add tests for deserialising arrays of basic types.
* Include method annotations in annotation stitching. This ensures that `@ConstructorForDeserialization` is not dropped.
* Enable test for SandboxBitSetSerializer.
* Enable tests for X.509 serializers.
* Implement serializers for ProtonJ primitive types.
* Serialize java.util.Date as a primitive type.
* Add the bintray Gradle plugin to the serialisation modules.
* Do not publish serialisation modules - they will become part of Corda itself.
* CORDA-2876: Only apply DJVM sources to Node Driver when devMode=true.
* Resolve DeteKT warnings.
* Require Node's JVM to set -Dnet.corda.djvm=true in order to enable DJVM.
* Enable DJVM for DemoBench nodes.
* Disable Quasar instrumentation verification for DemoBench nodes.
* Upgrade to DJVM 1.0-RC01.
* Try to modify DriverParameters in a more "ABI friendly" way.
* Refactor and simplify sandbox deserialisation of primitive objects.
* Review fixes.
* Update EvolutionSerializerFactory to handle sandboxed primitive boxed types.
* CORDA-3350: Increase size of constraints column (#5639)
* Detekt
* Update api file with new threshold
* Add check in transaction builder
* Revert "Add check in transaction builder"
This reverts commit ca3128f44c.
* Add check for max number of keys
* Update api file
* Address Tudor's comments
* Remove check for pre-5 and add test for EC keys
* fix typo and rename liquibase script
* updated docs with measurement numbers for composite keys
* Make detekt happy again
* Fix for CORDA-3315. Removed default implementation of partyFromKey and replaced with implementations in IdentityService sub-types.
* Added test.
* Added missing DB transaction to append only persistent map lookup.
* CORDA-3273: Replace deprecated use of Class.newInstance() for sake of DJVM. (#5522)
* ENT-4090: move startFlow into try block so exception is caught and managed (#5519)
* CORDA-3091: Move executor thread management into CordaRPCConnection (#5491)
* CORDA-3184 - Vault Query API enhancement: strict participants matching (#5524)
* Implementation of exact participant parsing for common query criteria.
* Added more unit tests + fixed a minor bug.
* Additional clean-up.
* Add documentation and changelog entry.
* Revert debug level SQL logging.
* Fix detekt errors.
* Fix docs formatting in code samples.
* Updating baseline (false positives being reported).
* Fix "Name shadowed: subRoot" code quality check.
* Fix API stability checker failures.
* Update baseline.
* TM-43 updating code style docs to reflect the addition of Detekt (#5521)
* CORDA-3226 Fix dba migration for PostgreSQL following changes in CORDA-3009 and ENT-4192 (#5529)
* Fix dta migration for PostgreSQL following changes for CORDA-3009 Invalid hash function used for PersistentIdentity in PersistentIdentityService
and ENT-4192 Identity service refactor for confidential-identities and accounts.
* Different table definition for PostgreSQL and other dbs in one changeset instead of running generic DDL and the specifically fix table in Postgres (in relation to CORDA-3009 Invalid hash function used for PersistentIdentity in PersistentIdentityService and ENT-4192 Identity service refactor for confidential-identities and accounts).
NotaryFlow.Client flow assumes the passed transaction is verified, which is
the case when it's invoked as a sub-flow in FinalityFlow. However,
NotaryFlow.Client can also be called directly from any custom flow, so
we need to ensure it performs transaction verification to avoid accidentally
sending an invalid transaction to a non-validating notary.
* NOTICK: Corda 4.3-RC01
Created first release candidate of Corda 4.3 - RC01.
* CORDA-3141: Add GracefulReconnect callbacks which allow logic to be performed when RPC disconnects unexpectedly (#5430)
Also removed potential for growing stack trace on reconnects.
* CORDA-2050 Upgrade Corda to Java 11 (compatibility mode) (#5356)
Upgrade Corda to run with Java 11 (compatibility mode) - see https://github.com/corda/corda/pull/5356
* ENT-4198 Adding legal text
Signed-off-by: Ed Prosser <edward.prosser@r3.com>
* TM-29 new baseline for 4.3 since new debt has been added with the last few commits (#5487)
* TM-23 compileAll task to compile all code (#5490)
* Add simple compileAll task to be used by warning check
* lazy configure compileAll
* TM-32 Merge OS 4.3 into 4.4
* TM-32 fixed detekt issue
* Downgrade Dokka back to 0.9.17 due to failing docs_builder.
* add ability to group test types together (#5459)
* add ability to group test types together
* add ability to specify podCount for use in parallel testing
* remove compiler xml
* add Jenkinsfile to enable scanning
* trigger build
* add ability to specify what docker tag to use from outside of the build
* fix docker work dir
* fix pipeline syntax issues
* use environment rather than `def`
* move agent restrictor outside of stages block
* use steps block
* more pipeline syntax fixes
* even more pipeline syntax fixes
* even more pipeline syntax fixes
* add kubenetize as property to image build
* move clear of docker image to end of build rather than start to prevent colocated builds
* escape dollar on docker image remove command
* attempt to kill all existing jobs
* fix compile issue due to killall_jobs
* fix compile issue due to killall_jobs pt2
* fix spelling
* make all variables environment variables
* add logic to delete images locally after pushing
* wrap testing phase with try / finally so that junit reports are always evaluated
* change the behaviour around post build actions
* break implicit link between testing phase and image building phase, allowing testing to occur without a rebuild and push of image
* prepend registry name to provided tag
* allow tasks to specify whether they wish to stream output from containers
* add timestamps directive to Jenkinsfile to have timing info on output
* make KubesTest resilient against transient pod failures in k8s
* increase CPU request
* add logic to allow specifying container resource requests
* attempt to run unit and integration tests in parallel
* change unit tests to use 3 cores to allow co-location on 8c machines
* join grouped tests together to give pod meaningful name
* add step to renew token with GKE
* change renew step to use pods instead of nodes
* fix bug where memory request is not correctly passed to pod
* disable unit tests for now
* [CORDA-2368] Added exception handling for missing files that displays appropriate messages rather than defaulting to file names. (#5472)
* NOTIK Minor adjustments to Detekt rules to reflect current working practises (#5498)
* Minor adjustments to rules to reflect current working practises (including IntelliJ code style alignment)
* Adjust another rule in line with existing code style.
* rebaseline with changed detekt ruleset
* rebaseline with NodeStartup changes
Updating FinalityFlow with functionality to allow the initiator to indicate the appropriate StatesToRecord. This allows the initiating party to record states in transactions which they are proposing but are not necessarily participants of. An example would be the issuance of a token where the only participant is the holder NOT the issuer.
* Removed IdentityServiceInternal as it is no longer used.
* Removed externalIdForPublicKey API from KMS and added it to IdentityService.
Added a registerKeyToExternalId API on IdentityService.
* Fix remaining compile errors.
* Removed "registerKeyToParty" and in its place added a new registerKey method which takes a PublicKey, Party and optionally a UUID.
Added a cache to the "PersistentIdentityService" to store other node's public keys.
Added the cache and new hibernate entity to all teh places where one needs to add them.
New keys created by teh node now automatically get associated entries in the KEY -> PARTY map and optionally the KEy -> EXT ID map.
Added a test.
* Removed old comments and TODOs.
* Fixed broken test.
Added comments/explanations for what's going on in IdentityService.
Updated kdocs.
* First try at Implementing publicKeysForExternalId.
* Fixed broken test.
* Added migration.
Amended existing persistent identity service migration to handle new migration.
Addressed some review comments.
* Fixed broken test - whoops!
* Implemented mock identity service methods.
* Added back exception when remapping a key to a different party.
* Fixed compile errors.
Fixed broken tests.
* Use set instead of first entry in ourNames.
* CORDA-3133 [v1]
This proposal is a little more flexible by design. It adds a property to the state pointer class, allowing them to be referenced in transactions on a per-state-pointer basis.
* CORDA-3133
- Updated `resolveAtTransaction` to `isResolved`.
- Moved `isResolved` out of the constructor into an abstract property.
- Added deprecation constructor declaration for backwards compatibility.
* CORDA-3133 (version 2)
- Added required changes to state pointers as per PR comments.
- Added unit tests to ensure isResolved can be used to configure when state pointers should be resolved to reference inputs.
* CORDA-3133 (version 2)
- fixed unit tests.
- added comment to changelog.rst.
- added helper functions to `StatePointer` to allow easier creation of static and linear pointers.
Allow node operators to blacklist signing keys (using blacklistedAttachmentSigningKeys config option). These blacklisted keys prevent attachments that are received over the network from being trusted. The docs have been updated to detail how to generate the key hashes that the config requires.
A new shell command attachments trustRoots has been added to see what attachments exist on the node along with information about their trust and where it comes from.
run dumpCheckpoints has been replaced by checkpoints dump as InternalCordaRPCOps needed to change to prevent a function that is meant to be internal from being visible on the shell.
* Split integration tests
* add simple example of printing all methods annotated with @Test
* add docker plugin to root project
remove docker plugin from child projects
add Dockerfile for image to use when testing
add task to build testing image to root project
* add comment describing proposed testing workflow
* simple attempt at running tests in docker container
* add my first k8s interaction script
* add fabric8 as dependnency to buildSrc
* before adding classpath
* collect reports from containers and run through testReports
* re-enable kubes backed testing
* for each project
1. add a list tests task
2. use this list tests task to modify the included tests
3. add a parallel version of the test task
* tweak logic for downloading test report XML files
* use output of parallel testing tasks in report tasks to determine build resultCode
* prepare for jenkins test
* prepare for jenkins test
* make docker reg password system property
* add logging to print out docker reg creds
* enable docker build
* fix gradle build file
* gather xml files into root project
* change log level for gradle modification
* stop printing gradle docker push passwd
* tidy up report generation
* fix compilation errors
* split signature constraints test into two
* change Sig constraint tests type hierarchy
* tidy up build.gradle
* try method based test includes
* add unit test for test listing
* fix bug with test slicing
* stop filtering ignored tests to make the numbers match existing runs
* change log level to ensure print out
* move all plugin logic to buildSrc files
* tidy up test modification
add comments to explain what DistributedTesting plugin does
* move new plugins into properly named packages
* tidy up runConfigs
* fix compile errors due to merge with slow-integration-test work
* add system parameter to enable / disable build modification
* add -Dkubenetise to build command
* address review comments
* type safe declaration of parameters in KubesTest
* Added an additional property on VaultQueryCriteria to specify an externalId/accountId when performing a vault query.
Added logic in hibernate query criteria parser to handle the exernalId join and lookup.
Added a test.
* Fixed error in test.
Fixed backwards incompatible changes.
* Updated changelog.
* Updated docs to remove incorrect instructions for querying by external ID.
* migrate PersistentIdentityService to use key.toShortString()
update definition of PublicKeyToExternalId mapping to allow fast lookup by externalId/publicKey
* fix misspelled table name
* add test of migration script
* add design document for proposal to move IdentityService to using the correct PK.toStringShort() method for hashing a publickey
* add enterprise testing considerations to design
* address review comments
* fix compilation errors
* modify PublicKeyToOwningIdentityCache to use toStringShort() as it's lookup key
* address syzmon's code review comments
* CORDA-3018 Allow loading an untrusted contract jar if another attachment exists that was signed with the same keys and uploaded by a trusted uploader
`TransactionUtils.isAttachmentTrusted` requirements have been relaxed
to allow an untrusted attachment to be loaded as long as another
attachment exists that is signed by the same keys and was uploaded
by a trusted uploader.
The requirement of containing the same contract classes has been
removed. Therefore the contents of the existing trusted attachment
no longer matters.
* CORDA-3018 Allow a subset/intersection of signers in `isAttachmentTrusted`
Allow a subset/intersection of signers to satisfy the signer
requirements of `isAttachmentTrusted`. This allows an "untrusted"
attachment that is signed by one or more keys to be "trusted" as long
as another trusted attachment already exists that is signed by at least
one of the "untrusted" attachments signers.
A cache of trusted and untrusted public keys is now held (replacing the
previous cache of `List<PublicKey>`.
Tests have been added to `NodeAttachmentServiceTest` to confirm that
an attachment query using an `EQUAL` statement will actually return
attachments that are signed by any of the keys passed into the query.
Confirming this allowed an `EQUAL` query to satisfy the search that
had to be done as part of this change.
`MockAttachmentStorage`'s query criteria was updated to better match
the real `NodeAttachmentService` implementation.
* CORDA-3018 Update cache name and kdoc on `isAttachmentTrusted`
* CORDA-3018 Verify that chains of trust do not occur
* CORDA-3018 Switch keys around to improve chain of trust tests
* [ENT-3801] Store transactions in the database during transaction resolution (#2305)
* ENT-3801: Store downloaded txns as part of the backchain resolution into the db rather than the checkpoint
It's very inefficient to store the downloaded backchain in the checkpoint as more of it downloaded. Instead, if a threshold is reached (which currently defaults at 0) then the backchain is stored in the transactions table as unverified. A new is_verified column has been added to track this. Initially testing on the OS codebase has been very promising but unfortunately this current code is not quite ready. I had to quickly port it to ENT as this is meant to be an ENT-only optimisation.
To that effect, there is a TransactionResolver abstraction with two implementations: an in-memory one which has the old behaviour, and which will be the behaviour for OS, and a db one.
DBTransactionStorage hasn't been fully updated and I had to comment out the optimistic path for now.
Most of these changes will need to be ported to OS to keep the merge conflicts in check, but obviously not DbTransactionsResolver and the "is_verified" changes in DBTransactionStorage. DBTransactionStorage does have other refactoring which will make sense to port though.
* [ENT-3801] Start work on allowing modifications in AppendOnlyPersistentMap
* [ENT-3801] Add transaction resolver tests
* [ENT-3801] Adjust suspendable annotations
* [ENT-3801] Fix the ResolveTransactionFlow tests
* [ENT-3801] Update ResolveTransactionsFlow tests
* [ENT-3801] Add a liquibase migration script for isVerified
* [ENT-3801] Ensure the migration runs in the correct place
* [ENT-3801] Handle resolution of already present transactions
* [ENT-3801] Fix compile error in performance test app
* [ENT-3801] Logging and comment updates, plus a test case
* [ENT-3801] Add a notary change resolution test
* [ENT-3801] Add a contract upgrade transaction test
* [ENT-3801] Change new column to be a character based status
* [ENT-3801] Migration script type change
* [ENT-3801] Address first round of review comments
* [ENT-3801] Update variable names in AppendOnlyPersistentMap
* [ENT-3801] Another variable name clarification
* [ENT-3801] Fix missing name changes
* [ENT-3801] Make the signature list immutable when constructing cache value
* [ENT-3801] Add a locking strategy for unverified transactions
* [ENT-3801] Address tidying up review comments
* [ENT-3801] First attempt at ensuring locks are released after commit
* [ENT-3801] Remove references to old cache name
* [ENT-3801] Update locking logic
* [ENT-3801] Fix potential deadlock with read/write transaction locks
* [ENT-3801] Remove read locks, and ensure minimal extra suspends
* [ENT-3801] Fix build issues in tests
* [ENT-3801] Use the correct clock when calculating sleep durations
* [ENT-3801] Add a pessimism flag for writing verified transactions
* [ENT-3801] Change logging statement to debug
(cherry picked from commit 8ab6a55e17)
* [NOTICK] Fix up imports for some changed files
* [NOTICK] Fix transaction resolution tests
* [NOTICK] Reinstate the DBTransactionsResolver
* [NOTICK] Add the topological sort back to recordTransactions
* [NOTICK] Adjust test case to remove dependency on query ordering
* [NOTICK] Make test code match that in ENT
Allow Hash Constraints to propagate to Signature Constraints. When
propagating, the new jar is added to the transaction instead of the
original contract attachment (jar).
The following requirements must be met to do so:
- System property "net.corda.node.disableHashConstraints" must be set
to `true`
- The min platform version must be 4 or greater
- There must be an input state with a hash constraint
- There must be no output states with a hash constraint
- The new jar must be signed
If these requirements are not met, the original Hash
Constraint will be kept and the contract attachment related to it is
also used.
This transition is done at the start of `handleContract` as it is not
the normal path a transition would follow. It is considered a backdoor
and should be treated separately from the rest of the attachment and
constraint logic. Furthermore, it will only work in private network
since all nodes must set the special `disableHashConstraints` flag.
As a general purpose API, allPersisted should not be loading the entire contents of the database table into memory. Instead now it returns a Stream for processing of elements.
* Moved core.flows and core.contract tests
* move internal tests
* move node, schemas and serialization tests
* Move transactions tests
* Move test access helper into test package
* Move remaining tests, and create access helpers to test internals.
* Fix test dependencies.
* Delete some cruft that flagged up on the API checker
* Add readme explaing where tests need to go.
* fix typo
* add a shared memory port allocator to allow multiple processes to share a single allocation pool
* remove dangerous reset function on port allocator
* set forkCount = 2 in node integration test
* only allow one build of a cordapp at any given time for Driver tests
* make all portallocation requests use same starting point
* globally set forks to 6
* tweak forking parameters to allow parallel builds
* tweak unit test parallelism
* 2 workers for integrationTest
* some more tweaks for parallel builds
* some more tweaks for parallel builds
* seems that 49K is not the start of ephemeral ports on all kernels
* tweak parallel settings
* try fix RPC shutdown test in parallel env
* add some logging for RPC shutdown test
* added some logging around PortAllocation tests - try figure out where they are getting stuck
* added some logging around PortAllocation tests - try figure out where they are getting stuck
* fix api-scanner tests
* minimize api changes
* revert to complying with existing API
* add the AtomicInteger for api compatibility reasons
* make sizing script executable
* address review comments pt1
* address review comments pt2
* fix compile errors after review comments
* return to using home dir as temp dir seemed to interact badly with gradle
Dumps all the node's checkpoints as JSON into a single zip file in the node's directory. The output contains:
* All the fields for the top-level flow
* The current sub-flow call stack, along with the current progress tracker step for each sub-flow
* The event that suspended the flow, which if it's a send or sendAndReceive will show the payload that was sent
* Low level information on the active sessions with other peers
Party and AnonymousParty have been retrofitted to implement this interface and are currently the only supported types. A new FlowLogic.initiateFlow(Destination) method overload to easily support the addition of new destination types in future versions.
To prevent making `dumpCheckpoints` part of the public API a new
interface, `InternalCordaRPCOps` has been created and the function
has been moved there. `InternalCordaRPCOps` inherits from
`CordaRPCOps`.
`CordaRPCOpsImpl` now implements `InternalCordaRPCOps`.
`RunShellCommand` and `StringToMethodCallParser` required additional
changes due to issues handling inherited functions. This has only been
raised now due to `InternalCordaRPCOps` inheriting from `CordaRPCOps`.
Many classes have had references to `CordaRPCOps` changed to
`InternalCordaRPCOps`.
* Reduce test execution times by explicitly configure quasar package exclusions (using new quasar util extension introduced in Corda gradle plugins 5.0.1-SNAPSHOT).
* Remove SNAPSHOT from Corda gradle plugins version identifier.
* Incorporating PR review feedback from CR.
* Minor consolidation clean-up.
* Minor consolidation clean-up.
* Minor consolidation clean-up.
Dumps all the node's checkpoints as JSON into a single zip file in the node's directory. The output contains:
* All the fields for the top-level flow
* The current sub-flow call stack, along with the current progress tracker step for each sub-flow
* The event that suspended the flow, which if it's a send or sendAndReceive will show the payload that was sent
* Low level information on the active sessions with other peers
