## Uses of Class
com.sleepycat.db.Transaction

- Packages that use Transaction
  Package | Description
  --- | ---
  com.sleepycat.collections | Data access based on the standard Java collections API.
  com.sleepycat.db | Berkeley DB Java API [reference guide] [Java programming notes].
  com.sleepycat.persist | The Direct Persistence Layer (DPL) adds a persistent object model to the Berkeley DB transactional engine.

- - ### Uses of Transaction in com.sleepycat.collections

    Methods in com.sleepycat.collections that return Transaction
    Modifier and Type | Method and Description
    --- | ---
    `Transaction` | CurrentTransaction.`abortTransaction()` Aborts the transaction that is active for the current thread for this environment and makes the parent transaction (if any) the current transaction.
    `Transaction` | CurrentTransaction.`beginTransaction(TransactionConfig config)` Begins a new transaction for this environment and associates it with the current thread.
    `Transaction` | CurrentTransaction.`commitTransaction()` Commits the transaction that is active for the current thread for this environment and makes the parent transaction (if any) the current transaction.
    `Transaction` | CurrentTransaction.`getTransaction()` Returns the transaction associated with the current thread for this environment, or null if no transaction is active.

  - ### Uses of Transaction in com.sleepycat.db

    Methods in com.sleepycat.db that return Transaction
    Modifier and Type | Method and Description
    --- | ---
    `Transaction` | Environment.`beginCDSGroup()` Allocate a locker ID in an environment configured for Berkeley DB Concurrent Data Store applications.
    `Transaction` | Environment.`beginTransaction(Transaction parent, TransactionConfig config)` Create a new transaction in the database environment.
    `Transaction` | PreparedTransaction.`getTransaction()` Return the transaction handle for the transaction.

    Methods in com.sleepycat.db with parameters of type Transaction
    Modifier and Type | Method and Description
    --- | ---
    `OperationStatus` | Database.`append(Transaction txn, DatabaseEntry key, DatabaseEntry data)` Append the key/data pair to the end of the database.
    `Transaction` | Environment.`beginTransaction(Transaction parent, TransactionConfig config)` Create a new transaction in the database environment.
    `CompactStats` | Database.`compact(Transaction txn, DatabaseEntry start, DatabaseEntry stop, DatabaseEntry end, CompactConfig config)` Compact a Btree or Recno database or returns unused Btree, Hash or Recno database pages to the underlying filesystem.
    `OperationStatus` | Database.`consume(Transaction txn, DatabaseEntry key, DatabaseEntry data, boolean wait)` Return the record number and data from the available record closest to the head of the queue, and delete the record.
    `OperationStatus` | Database.`delete(Transaction txn, DatabaseEntry key)` Remove key/data pairs from the database.
    `OperationStatus` | Database.`deleteMultiple(Transaction txn, MultipleEntry keys)` Remove key/data pairs from the database.
    `OperationStatus` | Database.`deleteMultipleKey(Transaction txn, MultipleEntry keys)` Remove key/data pairs from the database.
    `OperationStatus` | Database.`exists(Transaction txn, DatabaseEntry key)` Checks if the specified key appears in the database.
    `OperationStatus` | SecondaryDatabase.`get(Transaction txn, DatabaseEntry key, DatabaseEntry pKey, DatabaseEntry data, LockMode lockMode)` Retrieves the key/data pair with the given key.
    `OperationStatus` | Database.`get(Transaction txn, DatabaseEntry key, DatabaseEntry data, LockMode lockMode)` Retrieves the key/data pair with the given key from the database.
    `long` | Sequence.`get(Transaction txn, int delta)` Return the next available element in the sequence and changes the sequence value by `delta`.
    `KeyRange` | Database.`getKeyRange(Transaction txn, DatabaseEntry key)` Return an estimate of the proportion of keys in the database less than, equal to, and greater than the specified key.
    `OperationStatus` | SecondaryDatabase.`getSearchBoth(Transaction txn, DatabaseEntry key, DatabaseEntry pKey, DatabaseEntry data, LockMode lockMode)` Retrieves the key/data pair with the specified secondary and primary key, that is, both the primary and secondary key items must match.
    `OperationStatus` | Database.`getSearchBoth(Transaction txn, DatabaseEntry key, DatabaseEntry data, LockMode lockMode)` Retrieves the key/data pair with the given key and data value, that is, both the key and data items must match.
    `OperationStatus` | SecondaryDatabase.`getSearchRecordNumber(Transaction txn, DatabaseEntry key, DatabaseEntry pKey, DatabaseEntry data, LockMode lockMode)` Retrieves the key/data pair associated with the specific numbered record of the database.
    `OperationStatus` | Database.`getSearchRecordNumber(Transaction txn, DatabaseEntry key, DatabaseEntry data, LockMode lockMode)` Retrieves the key/data pair associated with the specific numbered record of the database.
    `DatabaseStats` | Database.`getStats(Transaction txn, StatsConfig config)` Return database statistics.
    `void` | Environment.`logPrint(Transaction txn, java.lang.String message)` Append an informational message to the Berkeley DB database environment log files.
    `Cursor` | Database.`openCursor(Transaction txn, CursorConfig config)` Return a cursor into the database.
    `Cursor` | SecondaryDatabase.`openCursor(Transaction txn, CursorConfig config)` Return a cursor into the database.
    `Database` | Environment.`openDatabase(Transaction txn, java.lang.String fileName, java.lang.String databaseName, DatabaseConfig config)` Open a database.
    `SecondaryCursor` | SecondaryDatabase.`openSecondaryCursor(Transaction txn, CursorConfig config)` Obtain a cursor on a database, returning a `SecondaryCursor`.
    `SecondaryDatabase` | Environment.`openSecondaryDatabase(Transaction txn, java.lang.String fileName, java.lang.String databaseName, Database primaryDatabase, SecondaryConfig config)` Open a database.
    `Sequence` | Database.`openSequence(Transaction txn, DatabaseEntry key, SequenceConfig config)` Open a sequence represented by the key in the database.
    `OperationStatus` | Database.`put(Transaction txn, DatabaseEntry key, DatabaseEntry data)` Store the key/data pair into the database.
    `OperationStatus` | Database.`putMultiple(Transaction txn, MultipleEntry key, MultipleEntry data, boolean overwrite)` Store a set of key/data pairs into the database.
    `OperationStatus` | Database.`putMultipleKey(Transaction txn, MultipleEntry key, boolean overwrite)` Store a set of key/data pairs into the database.
    `OperationStatus` | Database.`putNoDupData(Transaction txn, DatabaseEntry key, DatabaseEntry data)` Store the key/data pair into the database if it does not already appear in the database.
    `OperationStatus` | Database.`putNoOverwrite(Transaction txn, DatabaseEntry key, DatabaseEntry data)` Store the key/data pair into the database if the key does not already appear in the database.
    `void` | Environment.`removeDatabase(Transaction txn, java.lang.String fileName, java.lang.String databaseName)` Remove the database specified by the fileName and databaseName parameters.
    `void` | Database.`removeSequence(Transaction txn, DatabaseEntry key, SequenceConfig config)` Remove the sequence from the database.
    `void` | Environment.`renameDatabase(Transaction txn, java.lang.String fileName, java.lang.String databaseName, java.lang.String newName)` Rename a database.
    `int` | Database.`truncate(Transaction txn, boolean countRecords)` Empty the database, discarding all records it contains.

  - ### Uses of Transaction in com.sleepycat.persist

    Methods in com.sleepycat.persist with parameters of type Transaction
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | EntityIndex.`contains(Transaction txn, K key, LockMode lockMode)` Checks for existence of a key in this index.
    `boolean` | EntityIndex.`delete(Transaction txn, K key)` Deletes all entities with a given index key.
    `EntityCursor<V>` | EntityIndex.`entities(Transaction txn, CursorConfig config)` Opens a cursor for traversing all entities in this index.
    `ForwardCursor<E>` | EntityJoin.`entities(Transaction txn, CursorConfig config)` Opens a cursor that returns the entities qualifying for the join.
    `EntityCursor<V>` | EntityIndex.`entities(Transaction txn, K fromKey, boolean fromInclusive, K toKey, boolean toInclusive, CursorConfig config)` Opens a cursor for traversing entities in a key range.
    `V` | EntityIndex.`get(Transaction txn, K key, LockMode lockMode)` Gets an entity via a key of this index.
    `E` | PrimaryIndex.`get(Transaction txn, PK key, LockMode lockMode)`
    `E` | SecondaryIndex.`get(Transaction txn, SK key, LockMode lockMode)`
    `EntityCursor<K>` | EntityIndex.`keys(Transaction txn, CursorConfig config)` Opens a cursor for traversing all keys in this index.
    `ForwardCursor<PK>` | EntityJoin.`keys(Transaction txn, CursorConfig config)` Opens a cursor that returns the primary keys of entities qualifying for the join.
    `EntityCursor<K>` | EntityIndex.`keys(Transaction txn, K fromKey, boolean fromInclusive, K toKey, boolean toInclusive, CursorConfig config)` Opens a cursor for traversing keys in a key range.
    `E` | PrimaryIndex.`put(Transaction txn, E entity)` Inserts an entity and returns null, or updates it if the primary key already exists and returns the existing entity.
    `boolean` | PrimaryIndex.`putNoOverwrite(Transaction txn, E entity)` Inserts an entity and returns true, or returns false if the primary key already exists.
    `void` | PrimaryIndex.`putNoReturn(Transaction txn, E entity)` Inserts an entity, or updates it if the primary key already exists (does not return the existing entity).
    `void` | EntityStore.`truncateClass(Transaction txn, java.lang.Class entityClass)` Deletes all instances of this entity class and its (non-entity) subclasses.

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