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corda/tools/explorer
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josecoll 0280299104 Soft locking implementation using database coin selection 
Fix broken IssuerFlowTest

Fix IssuerFlowTests after rebase.

Resolve conflicts after rebase.

Soft locking converted to use persistent store.
Added additional optional 'includeLockStates' parameter in VaultService states API call.
Added Vault softLocked states query API call.

Fixed commercial paper failing test.
Improved exception handling on soft locking UPDATE statement.

Using SELECT FOR UPDATE to ensure correct soft locking data visibility.
Db query operations moved out of mutex code (as locking managed by underlying DB)

Adjusted logging severity levels.

Adjusted logging severity levels.

GenerateSpending now performing fine grained query for unconsumed states by joining with contract_cash_states table.
Using H2 proprietary cummulative counting feature (using sessioni SET variables)
Refactored and simplified HibernateObserver constructor to enable usage in JUnit tests.

Event generator issues larger random amounts (10,000..1,000,000) to those than are spent (0..10,000)
Adjusted Issue (5:1) and Exit (10:1) generation frequency vs spending.

Minor fixes: added optional lockid into select for spending criteria, set notary, additional trace logging.

Generate Cash Schema by default upon node start-up (as part of NodeSchemaService initialisation).

Explicitly close JDBC statements in finally() blocks.

Tightened HibernateObserver constructor.

Fix CommercialPaper test (was missing auto-generation of CONTRACT_CASH table)

Revert default JVM size back to 200Mb.

Revert default number of iterations in Explorer Node Simulation mode (back to 10000 with .5 sec sleep interval).

Remove redundant setter function.

Added TODO messages indicating Requery / H2 restrictions & caveats.

Consumed states lock updates now performed in general consumed state Update.

Updated/added Soft Locking documentation.

Addressed initial PR comments: use THREAD_LOCAL_KRYO, use AbstractParty, extract helper method, improve readability, address some doc typos

Addressed PR comment: removed lockId from WireTransaction.

Fixed soft locking UPDATE statements.

Improvements to VaultSoftLockManager for auto-registration of soft locks for flows with spendable states (as notifications from vault).
Other optimisations (IssuerFlow no longer explicitly reserve/release issued state) and improvements (soft lock release management of soft locks, docs update)

Performance update: now using Requery for UPDATE in release soft locking (non-composite key statement)

Removed redundant TODO messages (TODO: revisit Kryo bug when using THREAD_LOCAL_KYRO)

Minor fixes following rebase

Fixed failing JUnit following rebase

Addressed MH PR review items (1st pass)

Fix broken JUnit

Significant changes to RDBMS operations within coin selection and soft locking as requested by PR review.
(Removed SELECT FOR UPDATE; added RETRY upon coin selection; reverting partial soft locks)

Addressed a number of PR review requests added by MH (comments/spelling, lockID instantiation, HibernateObserver instantiation, cash schema white-listing usage)

Addressed latest PR review comments from RP.

Minor fixes following rebase from master.

Fixed final failing JUnit (issuer flow concurrent).

Updated TraderDemo to trigger concurrent issuance of cash.

Fixed compiler warning on lockId null check.

Fixed subtle bug in coin selection intermittently surfaced in IntegrationTestTutorial.

Fixed small memory leak.

Removed stray } in logger trace message.

Slight rewording of description of Soft Locking in docs.

Renamed NoStatesAvailableException to StatesNotAvailableException.
generateSpend is now Suspendable (calls sleep method on flow upon coin selection retry).

Added companion function to enable a Strand to sleep but without locking transactional context.

Improved logging, changed to StateNotAvailableException, using Flow sleep upon retry, tweaked SELECT criteria in coin selection, fixed bug when insufficient states selectable, generateSpend is now @suspendable

Improved handling and logging of flow results in Simulation Mode.

Fixed minor error in sleep when not an active flow.

Retry coin selection when unavailable states (as these may become available as new states).
Additional debug logging to highlight and identify H2 coin selection sporadic bug.

Inlined sleep method due to intermittent Quasar error.

Re-introduce selection clause that prevents selection and temporary locking of already locked states (by other flows).
Improved trace logging for coin selection (SQL row level info).
Correctly calling FlowStateMachineImpl sleep (now inlined and working correctly)

Fixed rebase error.

Remove redundant TODO message.
2017-03-27 17:12:33 +01:00
..
capsule
Merge DemoBench into Corda. (#380)
2017-03-21 14:24:13 +00:00
src
Soft locking implementation using database coin selection
2017-03-27 17:12:33 +01:00
build.gradle
Refactor CordaRPCClient into new :client:rpc Gradle module. (#405)
2017-03-22 15:52:54 +00:00
README.md
Update port numbers in explorer docs
2017-03-22 12:25:36 +01:00

README.md

Node Explorer

The node explorer provides views of the node's vault and transaction data using Corda's RPC framework. The user can execute cash transaction commands to issue and move cash to other parties on the network or exit cash using the user interface.

Running the UI

Windows:

gradlew.bat tools:explorer:run

Other:

./gradlew tools:explorer:run

Running Demo Nodes

A demonstration Corda network topology is configured with 5 nodes playing the following roles:

  1. Notary
  2. Issuer nodes (representing two fictional central banks - UK Bank Plc issuer of GBP and USA Bank Corp issuer of USD)
  3. Participant nodes (representing two users - Alice and Bob)

The Issuer nodes have the ability to issue, move and exit cash amounts. The Participant nodes are only able to spend cash (eg. move cash).

Windows:

gradlew.bat tools:explorer:runDemoNodes

Other:

./gradlew tools:explorer:runDemoNodes

These Corda nodes will be created on the following port on localhost.

  • Notary -> 20003 (Does not accept logins)
  • Alice -> 20006
  • Bob -> 20009
  • UK Bank Plc -> 20012 (Issuer node)
  • USA Bank Corp -> 20015 (Issuer node)

Explorer login credentials to the Issuer nodes are defaulted to manager and test. Explorer login credentials to the Participants nodes are defaulted to user1 and test. Please note you are not allowed to login to the notary.

TODOs:

  • Shows more useful information in the dashboard.
  • Improve Network View, display other nodes in the world map and show transactions between them.
  • Add a new view showing node's state machines.
  • Link transaction input to its originated transaction to make it easier to trace back.
  • Shows Node information (Configuration, properties etc.) in Settings view.
  • Support other contract types.

More information can be found in the Project website and Documentation.