org.calrissian.accumulorecipes.lastn.impl

Class AccumuloLastNStore

java.lang.Object

org.calrissian.accumulorecipes.lastn.impl.AccumuloLastNStore

All Implemented Interfaces:

LastNStore

public class AccumuloLastNStore
extends Object
implements LastNStore

Accumulo implementation of the LastN Store. This will try to create and configure the necessary table and properties if the necessary permissions have been granted. NOTE: If the tables need to be created manually, be sure to set the maxVersions property for all scopes of the versioning iterator to your N value. Also, add the IndexEntryFilteringIterator at priority 40.

Constructor Summary

Constructors

Constructor and Description
AccumuloLastNStore(org.apache.accumulo.core.client.Connector connector) Uses the default tableName, store config, and maxVersions
AccumuloLastNStore(org.apache.accumulo.core.client.Connector connector, int maxVersions) Uses the default tableName and store config
AccumuloLastNStore(org.apache.accumulo.core.client.Connector connector, String tableName, StoreConfig config, int maxVersions, org.calrissian.mango.types.TypeRegistry<String> typeRegistry) Uses the specified tableName, store config, and maxVersions

Method Summary

Methods

Modifier and Type	Method and Description
protected void	configureTable(org.apache.accumulo.core.client.Connector connector, String tableName, int maxVersions) Utility method to update the correct iterators to the table.
void	flush()
Iterable<org.calrissian.mango.domain.event.Event>	get(String index, Auths auths) Pull back the last N entries.
void	put(String group, org.calrissian.mango.domain.event.Event entry) Add the index which will be managed by the versioning iterator and the data rows to scan from the index
void	shutdown() Free up threads from the batch writer.

Methods inherited from class java.lang.Object

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

Constructor Detail

AccumuloLastNStore

public AccumuloLastNStore(org.apache.accumulo.core.client.Connector connector)
                   throws org.apache.accumulo.core.client.TableNotFoundException,
                          org.apache.accumulo.core.client.AccumuloSecurityException,
                          org.apache.accumulo.core.client.AccumuloException,
                          org.apache.accumulo.core.client.TableExistsException

Uses the default tableName, store config, and maxVersions

Parameters:

connector -

Throws:

org.apache.accumulo.core.client.TableNotFoundException

org.apache.accumulo.core.client.AccumuloSecurityException

org.apache.accumulo.core.client.AccumuloException

org.apache.accumulo.core.client.TableExistsException

AccumuloLastNStore

public AccumuloLastNStore(org.apache.accumulo.core.client.Connector connector,
                  int maxVersions)
                   throws org.apache.accumulo.core.client.TableNotFoundException,
                          org.apache.accumulo.core.client.AccumuloSecurityException,
                          org.apache.accumulo.core.client.AccumuloException,
                          org.apache.accumulo.core.client.TableExistsException

Uses the default tableName and store config

Parameters:

connector -

Throws:

org.apache.accumulo.core.client.TableNotFoundException

org.apache.accumulo.core.client.AccumuloSecurityException

org.apache.accumulo.core.client.AccumuloException

org.apache.accumulo.core.client.TableExistsException

AccumuloLastNStore

public AccumuloLastNStore(org.apache.accumulo.core.client.Connector connector,
                  String tableName,
                  StoreConfig config,
                  int maxVersions,
                  org.calrissian.mango.types.TypeRegistry<String> typeRegistry)
                   throws org.apache.accumulo.core.client.TableNotFoundException,
                          org.apache.accumulo.core.client.TableExistsException,
                          org.apache.accumulo.core.client.AccumuloSecurityException,
                          org.apache.accumulo.core.client.AccumuloException

Uses the specified tableName, store config, and maxVersions

Parameters:

connector -

Throws:

org.apache.accumulo.core.client.TableNotFoundException

org.apache.accumulo.core.client.TableExistsException

org.apache.accumulo.core.client.AccumuloSecurityException

org.apache.accumulo.core.client.AccumuloException

Method Detail

configureTable

protected void configureTable(org.apache.accumulo.core.client.Connector connector,
                  String tableName,
                  int maxVersions)
                       throws org.apache.accumulo.core.client.AccumuloSecurityException,
                              org.apache.accumulo.core.client.AccumuloException,
                              org.apache.accumulo.core.client.TableNotFoundException

Utility method to update the correct iterators to the table.

Parameters:

connector -

Throws:

org.apache.accumulo.core.client.AccumuloSecurityException

org.apache.accumulo.core.client.AccumuloException

org.apache.accumulo.core.client.TableNotFoundException

shutdown

public void shutdown()
              throws org.apache.accumulo.core.client.MutationsRejectedException

Free up threads from the batch writer.

Throws:

Exception

org.apache.accumulo.core.client.MutationsRejectedException

put

public void put(String group,
       org.calrissian.mango.domain.event.Event entry)

Add the index which will be managed by the versioning iterator and the data rows to scan from the index

Specified by:

put in interface LastNStore

Parameters:

group -

entry -

flush

public void flush()
           throws Exception

Specified by:

flush in interface LastNStore

Throws:

Exception

get

public Iterable<org.calrissian.mango.domain.event.Event> get(String index,
                                                    Auths auths)

Pull back the last N entries. EntryIterator will group entry getTuples into a single object on the server side.

Specified by:

get in interface LastNStore

Parameters:

index -

auths -

Returns: