com.thinkaurelius.titan.diskstorage.indexing

Class IndexTransaction

java.lang.Object

com.thinkaurelius.titan.diskstorage.indexing.IndexTransaction

All Implemented Interfaces:

BaseTransaction, LoggableTransaction

public class IndexTransaction
extends Object
implements BaseTransaction, LoggableTransaction

Wraps the transaction handle of an index and buffers all mutations against an index for efficiency. Also acts as a proxy to the IndexProvider methods.

Author:

Matthias Broecheler (me@matthiasb.com)

Constructor Summary

Constructors

Constructor and Description
IndexTransaction(IndexProvider index, KeyInformation.IndexRetriever keyInformations, BaseTransactionConfig config, Duration maxWriteTime)

Method Summary

Methods

Modifier and Type	Method and Description
void	add(String store, String docid, String key, Object value, boolean isNew)
void	commit() Commits the transaction and persists all modifications to the backend.
void	delete(String store, String docid, String key, Object value, boolean deleteAll)
void	logMutations(DataOutput out)
List<String>	query(IndexQuery query)
Iterable<RawQuery.Result<String>>	query(RawQuery query)
void	register(String store, String key, KeyInformation information)
void	rollback() Aborts (or rolls back) the transaction.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IndexTransaction

public IndexTransaction(IndexProvider index,
                KeyInformation.IndexRetriever keyInformations,
                BaseTransactionConfig config,
                Duration maxWriteTime)
                 throws StorageException

Throws:

StorageException

Method Detail

add

public void add(String store,
       String docid,
       String key,
       Object value,
       boolean isNew)

delete

public void delete(String store,
          String docid,
          String key,
          Object value,
          boolean deleteAll)

register

public void register(String store,
            String key,
            KeyInformation information)
              throws StorageException

Throws:

StorageException

query

public List<String> query(IndexQuery query)
                   throws StorageException

Throws:

StorageException

query

public Iterable<RawQuery.Result<String>> query(RawQuery query)
                                        throws StorageException

Throws:

StorageException

commit

public void commit()
            throws StorageException

Description copied from interface: BaseTransaction

Commits the transaction and persists all modifications to the backend. Call either this method or BaseTransaction.rollback() at most once per instance.

Specified by:

commit in interface BaseTransaction

Throws:

StorageException

rollback

public void rollback()
              throws StorageException

Description copied from interface: BaseTransaction

Aborts (or rolls back) the transaction. Call either this method or BaseTransaction.commit() at most once per instance.

Specified by:

rollback in interface BaseTransaction

Throws:

StorageException

logMutations

public void logMutations(DataOutput out)

Specified by:

logMutations in interface LoggableTransaction