Java Doc for OptimisticMapWrapper.java in  » Database-JDBC-Connection-Pool » Apache-commons-transaction-1.2 » org » apache » commons » transaction » memory » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database JDBC Connection Pool » Apache commons transaction 1.2 » org.apache.commons.transaction.memory   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.commons.transaction.memory.TransactionalMapWrapper       org.apache.commons.transaction.memory.OptimisticMapWrapper OptimisticMapWrapper public class OptimisticMapWrapper extends TransactionalMapWrapper (Code) Wrapper that adds transactional control to all kinds of maps that implement the Map interface. By using a naive optimistic transaction control this wrapper has better isolation than TransactionalMapWrapper , but may also fail to commit. Start a transaction by calling OptimisticMapWrapper.startTransaction() . Then perform the normal actions on the map and finally either call OptimisticMapWrapper.commitTransaction() to make your changes permanent or OptimisticMapWrapper.rollbackTransaction() to undo them. Caution: Do not modify values retrieved by OptimisticMapWrapper.get(Object) as this will circumvent the transactional mechanism. Rather clone the value or copy it in a way you see fit and store it back using OptimisticMapWrapper.put(Object,Object) . Note: This wrapper guarantees isolation level SERIALIZABLE. Caution: This implementation might be slow when large amounts of data is changed in a transaction as much references will need to be copied around. version:    $Id: OptimisticMapWrapper.java 493628 2007-01-07 01:42:48Z joerg $ See Also:   TransactionalMapWrapper See Also:   PessimisticMapWrapper Inner Class :public class CopyingTxContext extends TxContext Field Summary final protected static  int ACCESS_TIMEOUT      final protected static  int COMMIT_TIMEOUT      protected  Set activeTransactions      protected  ReadWriteLock commitLock      protected  LoggerFacade logger      Constructor Summary public   OptimisticMapWrapper(Map wrapped)      Creates a new optimistic transactional map wrapper. public   OptimisticMapWrapper(Map wrapped, MapFactory mapFactory, SetFactory setFactory)      Creates a new optimistic transactional map wrapper. public   OptimisticMapWrapper(Map wrapped, MapFactory mapFactory, SetFactory setFactory, LoggerFacade logger)      Creates a new optimistic transactional map wrapper. Method Summary public  Object checkForConflicts()      public  void commitTransaction()      public  void commitTransaction(boolean force)      protected  void copyChangesToConcurrentTransactions()      public  void rollbackTransaction()      public  void startTransaction()      Field Detail ACCESS_TIMEOUT final protected static int ACCESS_TIMEOUT(Code) COMMIT_TIMEOUT final protected static int COMMIT_TIMEOUT(Code) activeTransactions protected Set activeTransactions(Code) commitLock protected ReadWriteLock commitLock(Code) logger protected LoggerFacade logger(Code) Constructor Detail OptimisticMapWrapper public OptimisticMapWrapper(Map wrapped)(Code) Creates a new optimistic transactional map wrapper. Temporary maps and sets to store transactional data will be instances of java.util.HashMap and java.util.HashSet . Parameters:   wrapped - map to be wrapped OptimisticMapWrapper public OptimisticMapWrapper(Map wrapped, MapFactory mapFactory, SetFactory setFactory)(Code) Creates a new optimistic transactional map wrapper. Temporary maps and sets to store transactional data will be created and disposed using MapFactory and SetFactory . Parameters:   wrapped - map to be wrapped Parameters:   mapFactory - factory for temporary maps Parameters:   setFactory - factory for temporary sets OptimisticMapWrapper public OptimisticMapWrapper(Map wrapped, MapFactory mapFactory, SetFactory setFactory, LoggerFacade logger)(Code) Creates a new optimistic transactional map wrapper. Temporary maps and sets to store transactional data will be created and disposed using MapFactory and SetFactory . Parameters:   wrapped - map to be wrapped Parameters:   mapFactory - factory for temporary maps Parameters:   setFactory - factory for temporary sets Parameters:   logger - generic logger used for all kinds of logging Method Detail checkForConflicts public Object checkForConflicts()(Code) commitTransaction public void commitTransaction() throws ConflictException(Code) commitTransaction public void commitTransaction(boolean force) throws ConflictException(Code) copyChangesToConcurrentTransactions protected void copyChangesToConcurrentTransactions()(Code) rollbackTransaction public void rollbackTransaction()(Code) startTransaction public void startTransaction()(Code) Fields inherited from org.apache.commons.transaction.memory.TransactionalMapWrapper protected MapFactory mapFactory(Code)(Java Doc) protected SetFactory setFactory(Code)(Java Doc) protected Map wrapped(Code)(Java Doc) Methods inherited from org.apache.commons.transaction.memory.TransactionalMapWrapper public void clear()(Code)(Java Doc) public void commitTransaction()(Code)(Java Doc) public boolean containsKey(Object key)(Code)(Java Doc) public boolean containsValue(Object value)(Code)(Java Doc) public Set entrySet()(Code)(Java Doc) public Object get(Object key)(Code)(Java Doc) protected TxContext getActiveTx()(Code)(Java Doc) public int getTransactionState()(Code)(Java Doc) public boolean isEmpty()(Code)(Java Doc) public boolean isReadOnly()(Code)(Java Doc) public boolean isTransactionMarkedForRollback()(Code)(Java Doc) public Set keySet()(Code)(Java Doc) public void markTransactionForRollback()(Code)(Java Doc) public Object put(Object key, Object value)(Code)(Java Doc) public void putAll(Map map)(Code)(Java Doc) public Object remove(Object key)(Code)(Java Doc) public void resumeTransaction(TxContext suspendedTx)(Code)(Java Doc) public void rollbackTransaction()(Code)(Java Doc) protected void setActiveTx(TxContext txContext)(Code)(Java Doc) public int size()(Code)(Java Doc) public void startTransaction()(Code)(Java Doc) public TxContext suspendTransaction()(Code)(Java Doc) public Collection values()(Code)(Java Doc) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)