Package org.openstreetmap.atlas.generator.persistence.scheme

Class SlippyTilePersistenceScheme

java.lang.Object

org.openstreetmap.atlas.generator.persistence.scheme.SlippyTilePersistenceScheme

All Implemented Interfaces:

java.io.Serializable

public class SlippyTilePersistenceScheme
extends java.lang.Object
implements java.io.Serializable

This class helps users construct storage paths dynamically based on the name of the target resource to be saved. The various allowed storage schemes are defined in SlippyTilePersistenceSchemeType.

For example, one PBF storage scheme is 'ZZ_XX_YY_SUBFOLDERS_PBF', which is defined as 'zz/xx/yy/zz-xx-yy.pbf'. This means that when saving the PBF '12-34-48.pbf' to a remote store, users can easily construct the proper storage path for that PBF (i.e. 12/34/48/12-34-48.pbf) and use that to save the file. An example usage:

// Pbf is tile 12-34-48
// Assume we have some kind of PBF object
Pbf myPbfObject;
SlippyTilePersistenceScheme scheme = new SlippyTilePersistenceScheme(SlippyTilePersistenceSchemeType.ZZ_XX_YY_SUBFOLDERS_PBF);
// OR
SlippyTilePersistenceScheme scheme = SlippyTilePersistenceScheme.getSchemeInstanceFromString("ZZ_XX_YY_SUBFOLDERS_PBF");
WritableResource resource = new File(SparkFileHelper.combine("hdfs://myPBFs", scheme.compile(myPbfObject.getShard())));
myPbfObject.save(resource);
// we now have a PBF saved at "hdfs://myPBFs/12/34/48/12-34-48.pbf"


See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	X_INDEX
static java.lang.String	Y_INDEX
static java.lang.String	ZOOM

Constructor Summary

Constructors

Constructor	Description
SlippyTilePersistenceScheme(SlippyTilePersistenceSchemeType type)

Method Summary

Modifier and Type	Method	Description
java.lang.String	compile(java.lang.String zoom, java.lang.String xIndex, java.lang.String yIndex)
java.lang.String	compile(org.openstreetmap.atlas.geography.sharding.SlippyTile tile)
java.lang.String	getScheme()
static SlippyTilePersistenceScheme	getSchemeInstanceFromString(java.lang.String string)

Methods inherited from class java.lang.Object

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

Field Detail

ZOOM

public static final java.lang.String ZOOM

See Also:

Constant Field Values

X_INDEX

public static final java.lang.String X_INDEX

See Also:

Constant Field Values

Y_INDEX

public static final java.lang.String Y_INDEX

See Also:

Constant Field Values

Constructor Detail

SlippyTilePersistenceScheme

public SlippyTilePersistenceScheme(SlippyTilePersistenceSchemeType type)

Method Detail

getSchemeInstanceFromString

public static SlippyTilePersistenceScheme getSchemeInstanceFromString(java.lang.String string)

compile

public java.lang.String compile(org.openstreetmap.atlas.geography.sharding.SlippyTile tile)

compile

public java.lang.String compile(java.lang.String zoom,
                                java.lang.String xIndex,
                                java.lang.String yIndex)

getScheme

public java.lang.String getScheme()