de.ipcon.db.core

Class BOGraphPrefetcher

java.lang.Object

de.ipcon.db.core.BOGraphPrefetcher

public class BOGraphPrefetcher
extends java.lang.Object

This class is used to eliminate dead times when editing large object graphs. There is the problem that you have to edit hundreds or thousands of BOs for larger operations, and within the object graph, one or more roundtrips to the server are needed to set values via query from there. If you are working directly on the server, this is usually not really noticeable. But this is annoying at the latest if you are connecting via WLAN or, even worse, over a WAN connection. This class uses a simple trick: it triggers the "get" of requested relations or path by setting up a worker queue. The number of workers should be determined based on latency, bandwidth, server class as well as utilization, but at the moment we just just use the number of available processors. :-)

Constructor Summary

Constructors

Constructor and Description
BOGraphPrefetcher(BOLoaderI _bol)
BOGraphPrefetcher(BOLoaderI _bol, java.lang.String _debugName)
BOGraphPrefetcher(Transaction _tx)
BOGraphPrefetcher(Transaction _tx, java.lang.String _debugName)

Method Summary

Modifier and Type	Method and Description
boolean	finish()
boolean	finish(int maxSecs)
BOLoaderI	getBOLoader()
void	prefetch(BO bo, java.lang.String[] attPaths, boolean depthFirst)
void	prefetch(BO bo, java.lang.String[] attPaths, boolean depthFirst, boolean sync)
void	prefetch(java.lang.Class<? extends BOI> clazz, java.lang.String[] attPaths, boolean depthFirst)
void	prefetch(java.lang.Class<? extends BOI> clazz, java.lang.String[] attPaths, boolean depthFirst, boolean sync)
void	prefetch(java.util.List<java.lang.Long> ids, java.lang.Class<? extends BOI> clazz, java.lang.String[] attPaths, boolean depthFirst)
void	prefetch(java.util.List<java.lang.Long> ids, java.lang.Class<? extends BOI> clazz, java.lang.String[] attPaths, boolean depthFirst, boolean sync)
void	prefetch(java.lang.Long[] ids, java.lang.Class<? extends BOI> clazz, java.lang.String[] attPaths, boolean depthFirst)
void	prefetch(java.lang.Long[] ids, java.lang.Class<? extends BOI> clazz, java.lang.String[] attPaths, boolean depthFirst, boolean sync)
void	prefetch(java.lang.Long id, java.lang.Class<? extends BOI> clazz)
void	prefetch(java.lang.Long id, java.lang.Class<? extends BOI> clazz, java.lang.String[] attPaths, boolean depthFirst)
void	prefetch(java.lang.Long id, java.lang.Class<? extends BOI> clazz, java.lang.String[] attPaths, boolean depthFirst, boolean sync)
void	schedulePrefetch(java.lang.Runnable r)

Methods inherited from class java.lang.Object

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

Constructor Detail

BOGraphPrefetcher

public BOGraphPrefetcher(BOLoaderI _bol)

BOGraphPrefetcher

public BOGraphPrefetcher(BOLoaderI _bol,
                         java.lang.String _debugName)

BOGraphPrefetcher

public BOGraphPrefetcher(Transaction _tx)

BOGraphPrefetcher

public BOGraphPrefetcher(Transaction _tx,
                         java.lang.String _debugName)

Method Detail

prefetch

public void prefetch(java.lang.Class<? extends BOI> clazz,
                     java.lang.String[] attPaths,
                     boolean depthFirst)

prefetch

public void prefetch(java.lang.Class<? extends BOI> clazz,
                     java.lang.String[] attPaths,
                     boolean depthFirst,
                     boolean sync)

prefetch

public void prefetch(BO bo,
                     java.lang.String[] attPaths,
                     boolean depthFirst)

prefetch

public void prefetch(BO bo,
                     java.lang.String[] attPaths,
                     boolean depthFirst,
                     boolean sync)

prefetch

public void prefetch(java.lang.Long id,
                     java.lang.Class<? extends BOI> clazz,
                     java.lang.String[] attPaths,
                     boolean depthFirst)

prefetch

public void prefetch(java.lang.Long id,
                     java.lang.Class<? extends BOI> clazz,
                     java.lang.String[] attPaths,
                     boolean depthFirst,
                     boolean sync)

prefetch

public void prefetch(java.util.List<java.lang.Long> ids,
                     java.lang.Class<? extends BOI> clazz,
                     java.lang.String[] attPaths,
                     boolean depthFirst)

prefetch

public void prefetch(java.util.List<java.lang.Long> ids,
                     java.lang.Class<? extends BOI> clazz,
                     java.lang.String[] attPaths,
                     boolean depthFirst,
                     boolean sync)

prefetch

public void prefetch(java.lang.Long[] ids,
                     java.lang.Class<? extends BOI> clazz,
                     java.lang.String[] attPaths,
                     boolean depthFirst)

prefetch

public void prefetch(java.lang.Long[] ids,
                     java.lang.Class<? extends BOI> clazz,
                     java.lang.String[] attPaths,
                     boolean depthFirst,
                     boolean sync)

prefetch

public void prefetch(java.lang.Long id,
                     java.lang.Class<? extends BOI> clazz)

schedulePrefetch

public void schedulePrefetch(java.lang.Runnable r)

finish

public boolean finish()

finish

public boolean finish(int maxSecs)

getBOLoader

public BOLoaderI getBOLoader()