org.heigit.bigspatialdata.oshdb.api.db

Class OSHDBH2

java.lang.Object

org.heigit.bigspatialdata.oshdb.OSHDB

org.heigit.bigspatialdata.oshdb.api.db.OSHDBDatabase

org.heigit.bigspatialdata.oshdb.api.db.OSHDBJdbc

org.heigit.bigspatialdata.oshdb.api.db.OSHDBH2

All Implemented Interfaces:

AutoCloseable

public class OSHDBH2
extends OSHDBJdbc

OSHDB database backend connector to a H2 database.

Field Summary

Fields inherited from class org.heigit.bigspatialdata.oshdb.api.db.OSHDBJdbc

connection

Fields inherited from class org.heigit.bigspatialdata.oshdb.OSHDB

GEOM_PRECISION, GEOM_PRECISION_TO_LONG, MAXZOOM

Constructor Summary

Constructors

Constructor and Description
OSHDBH2(Connection conn)
OSHDBH2(String databaseFile) Opens a connection to oshdb data stored in a H2 database file.

Method Summary

Modifier and Type	Method and Description
OSHDBH2	inMemory(boolean cache) Creates an in-memory copy of the current oshdb data (using a volatile in-memory H2 database), for faster subsequent queries.
OSHDBH2	multithreading(boolean useMultithreading)
OSHDBH2	prefix(String prefix) Sets the "table/cache" name prefix to be used with this oshdb.

Methods inherited from class org.heigit.bigspatialdata.oshdb.api.db.OSHDBJdbc

close, createMapReducer, getConnection, metadata, multithreading

Methods inherited from class org.heigit.bigspatialdata.oshdb.api.db.OSHDBDatabase

clearTimeout, prefix, timeout, timeoutInMilliseconds, timeoutInMilliseconds

Methods inherited from class java.lang.Object

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

Constructor Detail

OSHDBH2

public OSHDBH2(String databaseFile)
        throws SQLException,
               ClassNotFoundException

Opens a connection to oshdb data stored in a H2 database file.

Parameters:

databaseFile - the file name and path to the H2 database file. (the ".mv.db" file ending of H2 should be omitted here)

Throws:

SQLException - if the database couldn't be opened

ClassNotFoundException - if the H2 database driver is not installed on the system

OSHDBH2

public OSHDBH2(Connection conn)
        throws ClassNotFoundException,
               SQLException

Throws:

ClassNotFoundException

SQLException

Method Detail

prefix

public OSHDBH2 prefix(String prefix)

Description copied from class: OSHDBDatabase

Sets the "table/cache" name prefix to be used with this oshdb.

Overrides:

prefix in class OSHDBJdbc

multithreading

public OSHDBH2 multithreading(boolean useMultithreading)

Overrides:

multithreading in class OSHDBJdbc

inMemory

public OSHDBH2 inMemory(boolean cache)
                 throws SQLException

Creates an in-memory copy of the current oshdb data (using a volatile in-memory H2 database), for faster subsequent queries.

The original database connection will be closed during this process.

Note that once the data has been cached in memory, this cannot be undone anymore by calling this method like `.inMemory(false)`.

Parameters:

cache - wether in-memory caching should be activated or not

Returns:

an OSHDBDatabase using the cached in-memory copy of the oshdb data

Throws:

SQLException - if there's a problem while copying the data into memory