Add atomic user mutation transaction extension - #327
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📝 WalkthroughWalkthroughThe PR adds caller-owned atomic user transactions. It extends SQL storage APIs, implements JDBC transaction scopes, coordinates cache state, wires MySQL, SQLite, and Bukkit backends, and adds transaction tests. ChangesAtomic user transactions
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant Caller
participant SharedUserDataRuntime
participant SqlUserStorage
participant JdbcSqlUserStorage
participant Database
Caller->>SharedUserDataRuntime: transaction(uuid, storage, initialValues, work)
SharedUserDataRuntime->>SqlUserStorage: flush pending cache changes
SharedUserDataRuntime->>SqlUserStorage: transaction(storage, initialValues, work)
SqlUserStorage->>JdbcSqlUserStorage: execute transaction
JdbcSqlUserStorage->>Database: ensure row and begin transaction
JdbcSqlUserStorage->>Caller: run work with TransactionScope
Caller-->>JdbcSqlUserStorage: callback result
JdbcSqlUserStorage->>Database: commit or rollback
SharedUserDataRuntime-->>Caller: return result
Merge Risk: 🟡 Moderate · up to A concurrent cache refresh can leave a stale player name visible after a committed user change. Synchronize all name-cache mutations before merging. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In
`@AdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/runtime/SharedUserDataRuntime.java`:
- Around line 169-175: Separate the post-transaction cache retirement from the
transaction outcome in the method containing backend.user(uuid).transaction:
wrap cacheOwner.remove(uuid) in its own catch, invoke
cacheOwner.cancelRemoval(uuid), and report the failure through the existing
cache-failure reporting mechanism without rethrowing it. Always return the
committed result so callers do not retry the durable mutation.
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📒 Files selected for processing (12)
AdvancedCore/src/main/java/com/bencodez/advancedcore/api/user/usercache/UserDataManager.javaAdvancedCore/src/main/java/com/bencodez/advancedcore/bukkit/user/runtime/BukkitUserCacheOwner.javaAdvancedCore/src/main/java/com/bencodez/advancedcore/bukkit/user/storage/BukkitSqlUserBackend.javaAdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/runtime/SharedUserDataRuntime.javaAdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/runtime/UserCacheOwner.javaAdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/storage/SqlUserStorage.javaAdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/storage/sql/JdbcSqlUserStorage.javaAdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/storage/sql/MysqlUserBackend.javaAdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/storage/sql/SqlUserBackendFactory.javaAdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/storage/sql/SqliteUserBackend.javaAdvancedCore/src/test/java/com/bencodez/advancedcore/tests/storage/SqliteRequiredColumnTest.javaAdvancedCore/src/test/java/com/bencodez/advancedcore/tests/storage/SqliteUserTransactionTest.java
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🔇 Additional comments (11)
AdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/storage/SqlUserStorage.java (1)
34-75: LGTM!AdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/storage/sql/SqlUserBackendFactory.java (1)
36-49: LGTM!AdvancedCore/src/main/java/com/bencodez/advancedcore/api/user/usercache/UserDataManager.java (1)
330-342: LGTM!AdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/storage/sql/JdbcSqlUserStorage.java (1)
126-172: LGTM!AdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/storage/sql/MysqlUserBackend.java (1)
65-68: LGTM!AdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/storage/sql/SqliteUserBackend.java (1)
63-66: LGTM!AdvancedCore/src/main/java/com/bencodez/advancedcore/core/user/runtime/UserCacheOwner.java (1)
17-18: LGTM!AdvancedCore/src/main/java/com/bencodez/advancedcore/bukkit/user/runtime/BukkitUserCacheOwner.java (1)
148-151: LGTM!AdvancedCore/src/test/java/com/bencodez/advancedcore/tests/storage/SqliteRequiredColumnTest.java (1)
54-69: LGTM!AdvancedCore/src/test/java/com/bencodez/advancedcore/tests/storage/SqliteUserTransactionTest.java (1)
99-398: LGTM!AdvancedCore/src/main/java/com/bencodez/advancedcore/bukkit/user/storage/BukkitSqlUserBackend.java (1)
187-196: 🩺 Stability & AvailabilityThe busy-timeout finding remains undecidable. The reviewed code opens a separate connection, but the exact legacy provider configuration and dependency version are unavailable. The inspected sqlite-jdbc source uses a 3000 ms default busy timeout, so the claim that the new connection fails without waiting is not generally established. The available evidence does not show that this provider configures a different timeout or that
DatabaseMetaData.getURL()drops such settings.
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In
`@AdvancedCore/src/main/java/com/bencodez/advancedcore/bukkit/user/storage/BukkitSqlUserBackend.java`:
- Line 186: Update the withSqlUser call in the transaction flow to pass
initialValues instead of an empty map, ensuring schema construction validates or
adds all columns later persisted by user.transaction.
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AdvancedCore/src/main/java/com/bencodez/advancedcore/bukkit/user/storage/BukkitSqlUserBackend.javaAdvancedCore/src/test/java/com/bencodez/advancedcore/tests/storage/SqliteUserTransactionTest.java
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🔇 Additional comments (1)
AdvancedCore/src/test/java/com/bencodez/advancedcore/tests/storage/SqliteUserTransactionTest.java (1)
372-379: LGTM!Also applies to: 386-386, 390-397
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Inline comments:
In
`@AdvancedCore/src/main/java/com/bencodez/advancedcore/api/user/userstorage/mysql/MySQL.java`:
- Line 368: Use the names monitor consistently for every names-cache mutation:
update loadData() and clearCacheBasic() so each clear, database query, and
resulting add sequence is performed while synchronized on names, matching the
existing synchronized clear. Ensure getNames() and all other names mutations use
this same lock so stale query results cannot be added after a refresh.
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AdvancedCore/src/main/java/com/bencodez/advancedcore/api/user/userstorage/mysql/MySQL.javaAdvancedCore/src/main/java/com/bencodez/advancedcore/bukkit/user/storage/BukkitSqlUserBackend.javaAdvancedCore/src/test/java/com/bencodez/advancedcore/tests/storage/SqliteUserTransactionTest.java
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🔇 Additional comments (2)
AdvancedCore/src/main/java/com/bencodez/advancedcore/bukkit/user/storage/BukkitSqlUserBackend.java (1)
181-181: PassinitialValuestowithSqlUser.The empty map still prevents
withSqlUserfrom adding unregistered initial-value columns to the schema. Transactions for new rows can fail when those columns are required.Proposed fix
- return withSqlUser(storage, uuid, java.util.Map.of(), user -> { + return withSqlUser(storage, uuid, initialValues, user -> {AdvancedCore/src/test/java/com/bencodez/advancedcore/tests/storage/SqliteUserTransactionTest.java (1)
425-425: LGTM!Also applies to: 430-449
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Summary
This is the AdvancedCore persistence prerequisite for integrating VotingPlugin's shared vote processor from BenCodez/VotingPlugin#1608 into the production Bukkit path. It extends the existing
JdbcSqlUserStoragetransaction envelope rather than adding a second transaction manager.SqlUserStorage.transaction(storage, work)provides a scoped, backend-owned JDBC transaction. AdvancedCore creates and locks the user row, lets the caller read and write that row through the scope, and permits caller-owned prepared SQL on the same connection. AdvancedCore alone begins, commits, rolls back, restores, and closes the connection. The callback must not manage the connection lifecycle. A unique key in a caller-owned table can identify the winning transaction on retry; the caller remains responsible for deadlock/busy retries.UserDataManager.withAtomicUserTransaction(uuid, storage, initialValues, work)supplies the production cache-safe entry point; initial values seed required columns on first row creation. It flushes queued changes under the existing per-user exclusive admission, runs the SQL transaction, and retires the old cache generation only after commit. When earlier queued cache changes require a new user row, prerequisite identity fields may commit before that independent cache flush; operation-specific mutation belongs only in the callback. A rollback leaves speculative callback values unpublished.Existing
readRow,contains,delete,write, andwriteValuescallers remain unchanged.writeValuesand the new callback use the same JDBC commit/rollback implementation. The callback is available through the MySQL/MariaDB, PostgreSQL, and SQLite backends, including the active Bukkit storage bridge. The bridge uses the current native SQL owner and a separate transaction-owned SQLite connection.Validation
mvn -B -f AdvancedCore/pom.xml -Dtest=SqliteUserTransactionTest,SqliteRequiredColumnTest test— 13 tests passed.mvn -B -f AdvancedCore/pom.xml clean package— 866 unit tests plus one packaged artifact test passed; zero failures/errors.git diff --checkpassed.AdvancedCore/target/AdvancedCore.jar(16,388,197 bytes; SHA-256c04b8c8f062c9e6037d8ed6284d7754ceb06f6eb3c4593146d3ff9caa21175fe).Scope
Builds on the merged shared SQL/user lifecycle work in AdvancedCore #324 and #325. This PR adds no vote-specific classes, VotingPlugin dependency, loader entry point, or reward-system change. Native reward replay/idempotency remains a separate blocker and is intentionally deferred.
Summary by CodeRabbit
New Features
Bug Fixes
Tests