org.databene.jdbacl.model.cache

Class CachingDBImporter

java.lang.Object

org.databene.jdbacl.model.cache.CachingDBImporter

All Implemented Interfaces:

Closeable, AutoCloseable, DBMetaDataImporter

public class CachingDBImporter
extends Object
implements DBMetaDataImporter, Closeable

DBMetaDataImporter that acts as a proxy to another DBMetaDataImporter, adding the feature of caching its output. The data file is named '<environment>.meta.xml' and expires after 12 hrs.

Created: 10.01.2011 14:48:00

Since:

0.6.5

Author:

Volker Bergmann

Field Summary

Fields

Modifier and Type	Field and Description
static long	DEFAULT_TIME_TO_LIVE
protected String	environment
protected JDBCDBImporter	realImporter
static String	TIME_TO_LIVE_SYSPROP

Constructor Summary

Constructors

Constructor and Description
CachingDBImporter(JDBCDBImporter realImporter, String environment)

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
protected File	getCacheFile()
static File	getCacheFile(String environment)
Database	importDatabase()
protected Database	importFreshData(File file)
protected Database	readCachedData(File cacheFile)
static void	updateCacheFile(Database database)
static Database	writeCacheFile(File file, Database database)

Methods inherited from class java.lang.Object

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

Field Detail

TIME_TO_LIVE_SYSPROP

public static final String TIME_TO_LIVE_SYSPROP

See Also:

Constant Field Values

DEFAULT_TIME_TO_LIVE

public static final long DEFAULT_TIME_TO_LIVE

realImporter

protected JDBCDBImporter realImporter

environment

protected String environment

Constructor Detail

CachingDBImporter

public CachingDBImporter(JDBCDBImporter realImporter,
                 String environment)

Method Detail

importDatabase

public Database importDatabase()
                        throws org.databene.commons.ConnectFailedException,
                               org.databene.commons.ImportFailedException

Specified by:

importDatabase in interface DBMetaDataImporter

Throws:

org.databene.commons.ConnectFailedException

org.databene.commons.ImportFailedException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException

getCacheFile

public static File getCacheFile(String environment)

getCacheFile

protected File getCacheFile()

readCachedData

protected Database readCachedData(File cacheFile)
                           throws org.databene.commons.ConnectFailedException,
                                  org.databene.commons.ImportFailedException

Throws:

org.databene.commons.ConnectFailedException

org.databene.commons.ImportFailedException

importFreshData

protected Database importFreshData(File file)
                            throws org.databene.commons.ConnectFailedException,
                                   org.databene.commons.ImportFailedException

Throws:

org.databene.commons.ConnectFailedException

org.databene.commons.ImportFailedException

updateCacheFile

public static void updateCacheFile(Database database)

writeCacheFile

public static Database writeCacheFile(File file,
                      Database database)