io.druid.metadata

Class IndexerSQLMetadataStorageCoordinator

java.lang.Object

io.druid.metadata.IndexerSQLMetadataStorageCoordinator

All Implemented Interfaces:

IndexerMetadataStorageCoordinator

public class IndexerSQLMetadataStorageCoordinator
extends Object
implements IndexerMetadataStorageCoordinator

Constructor Summary

Constructors

Constructor and Description
IndexerSQLMetadataStorageCoordinator(com.fasterxml.jackson.databind.ObjectMapper jsonMapper, MetadataStorageTablesConfig dbTables, SQLMetadataConnector connector)

Method Summary

Modifier and Type	Method and Description
SegmentIdentifier	allocatePendingSegment(String dataSource, String sequenceName, String previousSegmentId, org.joda.time.Interval interval, String maxVersion) Allocate a new pending segment in the pending segments table.
Set<DataSegment>	announceHistoricalSegments(Set<DataSegment> segments) Attempts to insert a set of segments to the database.
SegmentPublishResult	announceHistoricalSegments(Set<DataSegment> segments, DataSourceMetadata startMetadata, DataSourceMetadata endMetadata) Attempts to insert a set of segments to the metadata storage.
boolean	deleteDataSourceMetadata(String dataSource) Removes entry for 'dataSource' from the dataSource metadata table.
void	deleteSegments(Set<DataSegment> segments)
DataSourceMetadata	getDataSourceMetadata(String dataSource) Read dataSource metadata.
List<DataSegment>	getUnusedSegmentsForInterval(String dataSource, org.joda.time.Interval interval) Get all segments which include ONLY data within the given interval and are not flagged as used.
List<DataSegment>	getUsedSegmentsForInterval(String dataSource, org.joda.time.Interval interval) Get all segments which may include any data in the interval and are flagged as used.
List<DataSegment>	getUsedSegmentsForIntervals(String dataSource, List<org.joda.time.Interval> intervals) Get all segments which may include any data in the interval and are flagged as used.
boolean	resetDataSourceMetadata(String dataSource, DataSourceMetadata dataSourceMetadata) Resets dataSourceMetadata entry for 'dataSource' to the one supplied.
void	start()
protected io.druid.metadata.IndexerSQLMetadataStorageCoordinator.DataSourceMetadataUpdateResult	updateDataSourceMetadataWithHandle(org.skife.jdbi.v2.Handle handle, String dataSource, DataSourceMetadata startMetadata, DataSourceMetadata endMetadata) Compare-and-swap dataSource metadata in a transaction.
void	updateSegmentMetadata(Set<DataSegment> segments)

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexerSQLMetadataStorageCoordinator

@Inject
public IndexerSQLMetadataStorageCoordinator(com.fasterxml.jackson.databind.ObjectMapper jsonMapper,
                                                    MetadataStorageTablesConfig dbTables,
                                                    SQLMetadataConnector connector)

Method Detail

start

public void start()

getUsedSegmentsForInterval

public List<DataSegment> getUsedSegmentsForInterval(String dataSource,
                                                    org.joda.time.Interval interval)
                                             throws IOException

Description copied from interface: IndexerMetadataStorageCoordinator

Get all segments which may include any data in the interval and are flagged as used.

Specified by:

getUsedSegmentsForInterval in interface IndexerMetadataStorageCoordinator

Parameters:

dataSource - The datasource to query

interval - The interval for which all applicable and used datasources are requested. Start is inclusive, end is exclusive

Returns:

The DataSegments which include data in the requested interval. These segments may contain data outside the requested interval.

Throws:

IOException

getUsedSegmentsForIntervals

public List<DataSegment> getUsedSegmentsForIntervals(String dataSource,
                                                     List<org.joda.time.Interval> intervals)
                                              throws IOException

Description copied from interface: IndexerMetadataStorageCoordinator

Get all segments which may include any data in the interval and are flagged as used.

Specified by:

getUsedSegmentsForIntervals in interface IndexerMetadataStorageCoordinator

Parameters:

dataSource - The datasource to query

intervals - The intervals for which all applicable and used datasources are requested.

Returns:

The DataSegments which include data in the requested intervals. These segments may contain data outside the requested interval.

Throws:

IOException

announceHistoricalSegments

public Set<DataSegment> announceHistoricalSegments(Set<DataSegment> segments)
                                            throws IOException

Attempts to insert a set of segments to the database. Returns the set of segments actually added (segments with identifiers already in the database will not be added).

Specified by:

announceHistoricalSegments in interface IndexerMetadataStorageCoordinator

Parameters:

segments - set of segments to add

Returns:

set of segments actually added

Throws:

IOException

announceHistoricalSegments

public SegmentPublishResult announceHistoricalSegments(Set<DataSegment> segments,
                                                       DataSourceMetadata startMetadata,
                                                       DataSourceMetadata endMetadata)
                                                throws IOException

Attempts to insert a set of segments to the metadata storage. Returns the set of segments actually added (segments with identifiers already in the metadata storage will not be added).

If startMetadata and endMetadata are set, this insertion will be atomic with a compare-and-swap on dataSource commit metadata.

Specified by:

announceHistoricalSegments in interface IndexerMetadataStorageCoordinator

Parameters:

segments - set of segments to add, must all be from the same dataSource

startMetadata - dataSource metadata pre-insert must match this startMetadata according to DataSourceMetadata.matches(DataSourceMetadata). If null, this insert will not involve a metadata transaction

endMetadata - dataSource metadata post-insert will have this endMetadata merged in with DataSourceMetadata.plus(DataSourceMetadata). If null, this insert will not involve a metadata transaction

Returns:

segment publish result indicating transaction success or failure, and set of segments actually published

Throws:

IOException

allocatePendingSegment

public SegmentIdentifier allocatePendingSegment(String dataSource,
                                                String sequenceName,
                                                String previousSegmentId,
                                                org.joda.time.Interval interval,
                                                String maxVersion)
                                         throws IOException

Description copied from interface: IndexerMetadataStorageCoordinator

Allocate a new pending segment in the pending segments table. This segment identifier will never be given out again, unless another call is made with the same dataSource, sequenceName, and previousSegmentId.

The sequenceName and previousSegmentId parameters are meant to make it easy for two independent ingestion tasks to produce the same series of segments.

Note that a segment sequence may include segments with a variety of different intervals and versions.

Specified by:

allocatePendingSegment in interface IndexerMetadataStorageCoordinator

Parameters:

dataSource - dataSource for which to allocate a segment

sequenceName - name of the group of ingestion tasks producing a segment series

previousSegmentId - previous segment in the series; may be null or empty, meaning this is the first segment

interval - interval for which to allocate a segment

maxVersion - use this version if we have no better version to use. The returned segment identifier may have a version lower than this one, but will not have one higher.

Returns:

the pending segment identifier, or null if it was impossible to allocate a new segment

Throws:

IOException

getDataSourceMetadata

public DataSourceMetadata getDataSourceMetadata(String dataSource)

Read dataSource metadata. Returns null if there is no metadata.

Specified by:

getDataSourceMetadata in interface IndexerMetadataStorageCoordinator

updateDataSourceMetadataWithHandle

protected io.druid.metadata.IndexerSQLMetadataStorageCoordinator.DataSourceMetadataUpdateResult updateDataSourceMetadataWithHandle(org.skife.jdbi.v2.Handle handle,
                                                                                                                                   String dataSource,
                                                                                                                                   DataSourceMetadata startMetadata,
                                                                                                                                   DataSourceMetadata endMetadata)
                                                                                                                            throws IOException

Compare-and-swap dataSource metadata in a transaction. This will only modify dataSource metadata if it equals oldCommitMetadata when this function is called (based on T.equals). This method is idempotent in that if the metadata already equals newCommitMetadata, it will return true.

Parameters:

handle - database handle

dataSource - druid dataSource

startMetadata - dataSource metadata pre-insert must match this startMetadata according to DataSourceMetadata.matches(DataSourceMetadata)

endMetadata - dataSource metadata post-insert will have this endMetadata merged in with DataSourceMetadata.plus(DataSourceMetadata)

Returns:

true if dataSource metadata was updated from matching startMetadata to matching endMetadata

Throws:

IOException

deleteDataSourceMetadata

public boolean deleteDataSourceMetadata(String dataSource)

Description copied from interface: IndexerMetadataStorageCoordinator

Removes entry for 'dataSource' from the dataSource metadata table.

Specified by:

deleteDataSourceMetadata in interface IndexerMetadataStorageCoordinator

Parameters:

dataSource - identifier

Returns:

true if the entry was deleted, false otherwise

resetDataSourceMetadata

public boolean resetDataSourceMetadata(String dataSource,
                                       DataSourceMetadata dataSourceMetadata)
                                throws IOException

Description copied from interface: IndexerMetadataStorageCoordinator

Resets dataSourceMetadata entry for 'dataSource' to the one supplied.

Specified by:

resetDataSourceMetadata in interface IndexerMetadataStorageCoordinator

Parameters:

dataSource - identifier

dataSourceMetadata - value to set

Returns:

true if the entry was reset, false otherwise

Throws:

IOException

updateSegmentMetadata

public void updateSegmentMetadata(Set<DataSegment> segments)
                           throws IOException

Specified by:

updateSegmentMetadata in interface IndexerMetadataStorageCoordinator

Throws:

IOException

deleteSegments

public void deleteSegments(Set<DataSegment> segments)
                    throws IOException

Specified by:

deleteSegments in interface IndexerMetadataStorageCoordinator

Throws:

IOException

getUnusedSegmentsForInterval

public List<DataSegment> getUnusedSegmentsForInterval(String dataSource,
                                                      org.joda.time.Interval interval)

Description copied from interface: IndexerMetadataStorageCoordinator

Get all segments which include ONLY data within the given interval and are not flagged as used.

Specified by:

getUnusedSegmentsForInterval in interface IndexerMetadataStorageCoordinator

Parameters:

dataSource - The datasource the segments belong to

interval - Filter the data segments to ones that include data in this interval exclusively. Start is inclusive, end is exclusive

Returns:

DataSegments which include ONLY data within the requested interval and are not flagged as used. Data segments NOT returned here may include data in the interval