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97 changes: 65 additions & 32 deletions
97
exposed/src/main/kotlin/org/jetbrains/exposed/sql/transactions/experimental/Suspended.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,66 +1,99 @@ | ||
| package org.jetbrains.exposed.sql.transactions.experimental | ||
|
|
||
| import kotlinx.coroutines.* | ||
| import kotlinx.coroutines.selects.SelectClause1 | ||
| import kotlinx.coroutines.selects.SelectInstance | ||
| import kotlinx.coroutines.sync.withLock | ||
| import org.jetbrains.exposed.sql.Database | ||
| import org.jetbrains.exposed.sql.Transaction | ||
| import org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManager | ||
| import org.jetbrains.exposed.sql.transactions.TransactionManager | ||
| import org.jetbrains.exposed.sql.transactions.transaction | ||
| import org.jetbrains.exposed.sql.* | ||
| import org.jetbrains.exposed.sql.transactions.* | ||
| import org.jetbrains.exposed.sql.transactions.rollbackLoggingException | ||
| import java.lang.Exception | ||
| import java.util.* | ||
| import kotlin.coroutines.CoroutineContext | ||
|
|
||
| suspend fun <T> suspendedTransaction(context: CoroutineContext? = null, db: Database? = null, statement: suspend Transaction.() -> T): T { | ||
| return suspendedTransactionAsync(context, db, statement = statement).await().result | ||
| return suspendedTransactionAsync(context, db, statement = statement).await() | ||
| } | ||
|
|
||
| suspend fun <T> Transaction.suspendedTransaction(context: CoroutineContext? = null, statement: suspend Transaction.() -> T): T { | ||
| return suspendedTransactionAsyncInternal(context, db, currentTransaction = this, statement = statement).await().result | ||
| val suspendedTransactionAsyncInternal = suspendedTransactionAsyncInternal(context, db, currentTransaction = this, statement = statement) | ||
| return suspendedTransactionAsyncInternal.await() | ||
| } | ||
|
|
||
| class TransactionResult<T>(internal val transaction: Transaction, val result:T) | ||
| class TransactionResult<T>(internal val transaction: Transaction, | ||
| internal val deferred: Deferred<T>, | ||
| private val selectClause: SelectClause1<T>, | ||
| internal var closeTransaction : Boolean = true) : Deferred<T> by deferred, SelectClause1<T> by selectClause { | ||
|
|
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| suspend fun <T, R> Deferred<TransactionResult<T>>.andThen(statement: suspend Transaction.(T) -> R) : Deferred<TransactionResult<R>> { | ||
| val firstResult = this.await() | ||
| return suspendedTransactionAsync { | ||
| with(firstResult.transaction) { | ||
| suspendedMutex.withLock { | ||
| statement(firstResult.result) | ||
| override fun invokeOnCompletion(handler: CompletionHandler): DisposableHandle { | ||
| if (closeTransaction) { | ||
| try { | ||
| transaction.commit() | ||
| transaction.closeLoggingException { exposedLogger.warn("Transaction close failed: ${it.message}. Statement: ${transaction.currentStatement}", it) } | ||
| } catch (e: Exception) { | ||
| transaction.rollbackLoggingException { exposedLogger.warn("Transaction rollback failed: ${it.message}. Statement: ${transaction.currentStatement}", it) } | ||
| throw e | ||
| } | ||
| } | ||
| return deferred.invokeOnCompletion(handler) | ||
| } | ||
| } | ||
|
|
||
| suspend fun <T, R> TransactionResult<T>.andThen(statement: suspend Transaction.(T) -> R) : TransactionResult<R> { | ||
| val currentAsync = this | ||
| return suspendedTransactionAsyncInternal(currentTransaction = transaction) { | ||
| currentAsync.closeTransaction = false | ||
| statement(currentAsync.deferred.await()) | ||
| } | ||
| } | ||
|
|
||
| suspend fun <T> suspendedTransactionAsync(context: CoroutineContext? = null, db: Database? = null, | ||
| useOuterTransactionIfAccessible: Boolean = true, statement: suspend Transaction.() -> T) : Deferred<TransactionResult<T>> { | ||
| useOuterTransactionIfAccessible: Boolean = true, statement: suspend Transaction.() -> T) : TransactionResult<T> { | ||
| val currentTransaction = TransactionManager.currentOrNull().takeIf { useOuterTransactionIfAccessible } | ||
| return suspendedTransactionAsyncInternal(context, db, currentTransaction, statement) | ||
| } | ||
|
|
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| suspend private fun <T> suspendedTransactionAsyncInternal(context: CoroutineContext? = null, db: Database? = null, | ||
| currentTransaction: Transaction?, statement: suspend Transaction.() -> T) : Deferred<TransactionResult<T>> = coroutineScope { | ||
| val manager = db?.let { TransactionManager.managerFor(it) } ?: TransactionManager.manager | ||
| private suspend fun <T> suspendedTransactionAsyncInternal(context: CoroutineContext? = null, db: Database? = null, | ||
| currentTransaction: Transaction?, statement: suspend Transaction.() -> T) : TransactionResult<T> = coroutineScope { | ||
| val manager = (currentTransaction?.db ?: db)?.let { TransactionManager.managerFor(it) } | ||
| ?: TransactionManager.manager | ||
| val threadLocalManager = manager as? ThreadLocalTransactionManager | ||
|
|
||
| if (currentTransaction != null) { | ||
| val scope = (if (threadLocalManager != null) { | ||
| (context ?: coroutineContext) + threadLocalManager.threadLocal.asContextElement(currentTransaction) | ||
| } else (context ?: coroutineContext)) + TransactionManager.currentThreadManager.asContextElement(manager) | ||
| async(scope) { | ||
| currentTransaction.suspendedMutex.withLock { | ||
| TransactionResult(currentTransaction, currentTransaction.statement()) | ||
| } | ||
| } | ||
| } else | ||
| val asyncLazy = asyncTxInvocation(scope, currentTransaction, statement) | ||
| TransactionResult(currentTransaction, asyncLazy, asyncLazy as SelectClause1<T>, false) | ||
| } else { | ||
| val tx = manager.newTransaction(manager.defaultIsolationLevel) | ||
| val scope = (if (threadLocalManager != null) { | ||
| (context ?: coroutineContext) + threadLocalManager.threadLocal.asContextElement(tx) | ||
| } else (context ?: coroutineContext)) + TransactionManager.currentThreadManager.asContextElement() | ||
| val asyncLazy = asyncTxInvocation(scope, tx, statement) | ||
| TransactionResult(tx, asyncLazy, asyncLazy as SelectClause1<T>, false) | ||
| } | ||
| } | ||
|
|
||
| transaction(manager.defaultIsolationLevel, manager.defaultRepetitionAttempts, db) { | ||
| val tx = this | ||
| val scope = (if (threadLocalManager != null) { | ||
| (context ?: coroutineContext) + threadLocalManager.threadLocal.asContextElement(tx) | ||
| } else (context ?: coroutineContext)) + TransactionManager.currentThreadManager.asContextElement() | ||
| async(scope) { | ||
| tx.suspendedMutex.withLock { | ||
| TransactionResult(tx, tx.statement()) | ||
| private fun <T> CoroutineScope.asyncTxInvocation(scope: CoroutineContext, tx: Transaction, statement: suspend Transaction.() -> T): Deferred<T> { | ||
| return async(context = scope, start = CoroutineStart.LAZY) { | ||
| tx.suspendedMutex.withLock { | ||
| try { | ||
| tx.statement() | ||
| } catch (e: Throwable) { | ||
| tx.rollbackLoggingException { exposedLogger.warn("Transaction rollback failed: ${it.message}. Statement: ${tx.currentStatement}", it) } | ||
| throw e | ||
| } finally { | ||
| try { | ||
| tx.currentStatement?.let { | ||
| it.close() | ||
| tx.currentStatement = null | ||
| } | ||
| tx.closeExecutedStatements() | ||
| } catch (e: Exception) { | ||
| exposedLogger.warn("Statements close failed", e) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } |
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