* ENT-2014 Deletes of NodeInfo can fail to propagate leading to infinite retries
ENT-1880 Move identity key generation to network registration process
(cherry picked from commit c3ac203)
* CORDA-1645: Checkpoint before calling an idempotent sub-flow.
When an idempotent sub-flow causes a flow restart, the flow will be
replayed from the last checkpoint before the sub-flow invocation.
However, the logic between the last checkpoint and the sub-flow invocation
may contain side-effects which shouldn't be replayed. Thus we need to persist
a checkpoint just before an idempotent sub-flow is invoked.
As reported in [CORDA-1609](https://r3-cev.atlassian.net/browse/CORDA-1609),
`CordaRPCClientConfiguration.default` is not accessible from Java since
`default` is a reserved keyword.
As part of the refactor made in #2831, `CordaRPCClientConfiguration` went
from being a data class to an interface with a backing implementation of
type `CordaRPCClientConfigurationImpl`.
This resulted in Java users having to rewrite code that was on the form:
```java
final CordaRPCClient client = new CordaRPCClient(
nodeAddress, CordaRPCClientConfiguration.DEFAULT
);
```
to something like this:
```java
final CordaRPCClient client = new CordaRPCClient(
nodeAddress, CordaRPCClientConfiguration.Companion.default()
);
```
However, this does not work. The user would get a compilation error because
`default` is a reserved keyword in Java.
Since `CordaRPCClientConfiguration` has been made an interface, there is no
easy way of introducing a static final field on the interface from Kotlin.
Consequently, I've changed this back to using a `class` with a static field
named `DEFAULT` instead of the static method `default()`.
It should be noted that `default()` / `DEFAULT` is currently only used
internally to pass in default values in `CordaRPCClient.kt` and
`CordaRPCClientUtils.kt`. That said, it is exposed as part of our API
surface and consequently shouldn't be broken.
The latter means that in the above example, the user would actually not
have to provide the parameter at all:
```java
final CordaRPCClient client = new CordaRPCClient(nodeAddress);
```
As can be seen from the definition of `CordaRPCClient`:
```kotlin
class CordaRPCClient private constructor(...) {
@JvmOverloads
constructor(
hostAndPort: NetworkHostAndPort,
configuration: CordaRPCClientConfiguration = CordaRPCClientConfiguration.DEFAULT
) : this(hostAndPort, configuration, null)
```
The mentioned [refactor](7a077e76f0 (diff-0948c125db93a22263eb81eaf3161c17R65))
did not make it into the 3.1 release, so from an API-stability perspective,
this change can be applied without affecting our commitment to a
backwards compatible API..
* filter by contract state in _trackBy
* write tests to check that _trackBy is filtering the states correct and tidy up filtering functions
* remove un needed function
* add change log message for filtering unrelated ContractStates from trackBy
* CORDA-1599 Add a mechanism so killFlow can clean up the in memory data structures held by the Flow Hospital and other transition executor implementations.
* Fix bug and test
* Fix bug and test
It will re-run automatically from last checkpoint on node restart, allowing the opportunity to resolve the issue, something required when dealing with contract constraint failures.
* CORDA-1589 Flow hospital reports incorrect number of patients and fix flakey associated test.
* Compare before and after count, not against zero. There's a leak in killFlow that will be easier to address in or after Shams PR.
* Remove all notion of message level retry.
* Introduce randomness into de-duplication IDs based on the session rather than the flow, in support of idempotent flows.
* CORDA-1494: Re-enable notarisation retries in the new state machine manager.
The original message-based retry approach does not work well with the new
flow state machine due to the way sessions are handled. We decided to move
the retry logic to flow-level: introduce RetryableFlow that won't have
checkpoints persisted and will be restarted after a configurable timeout
if it does not complete in time.
The RetryableFlow functionality will be internal for now, as it's mainly
tailored for the notary client flow, and there are many subtle ways it can
fail when used with arbitrary flows.
