WriteTransaction

public class WriteTransaction extends Transaction<WritableContainer> implements WriteTransactionInterface

This class is responsible for inserting, updating and deleting entities which are held in the TransactionContainer.

This class initializes and runs the Schedule of Jobs, calls the BackendTransactions for each entity, and handles exceptions, roll-back (if necessary) and clean up afterwards.

Author:

Timm Fitschen

Constructors

WriteTransaction

public WriteTransaction(WritableContainer container)

Methods

checkPermissions

public static void checkPermissions(EntityInterface entity, Set<Permission> permissions)

Check if the user has all permissions

cleanUp

protected final void cleanUp()

commit

protected void commit()

deriveUpdate

public HashSet<Permission> deriveUpdate(EntityInterface newEntity, EntityInterface oldEntity)

The entity is set to VALID iff there are no updates to be processed. The entity is set to QUALIFIED otherwise.

Parameters:

• newEntity –

• oldEntity –

Throws:

• CaosDBException –

• IOException –

• NoSuchAlgorithmException –

generateId

public String generateId()

getSRID

public String getSRID()

init

protected void init()

logHistory

public boolean logHistory()

postCheck

protected void postCheck()

postTransaction

protected void postTransaction()

preCheck

protected void preCheck()

preTransaction

protected final void preTransaction()

rollBack

protected void rollBack()

setNoIdIsError

public void setNoIdIsError(boolean noIdIsError)

Set if it is an error, if an Entity has no ID but just a name upon update.

transaction

protected void transaction()