com.aspc.DBObj.Internal

Class LoadCacheUtil

java.lang.Object

com.aspc.DBObj.Internal.LoadCacheUtil

public final class LoadCacheUtil
extends java.lang.Object

Load Field cache. Generally we must insure that the list of rows is the super set of the possible rows for this value. We don't care if there are extra rows for a value because they will be filtered out later. So we don't need to monitor what the value was just what it is now. 1) Load until 60% full 2) mark the holder as untrusted until we reach the end of the list 3) check the transaction number before and after if changed repeat THREAD MODE: MULTI-THREADED

Since:

January 7, 2002, 12:31 PM

Author:

Nigel Leck

Method Summary

Modifier and Type	Method and Description
static java.lang.String	iLoadDataCache(VirtualDB layer, DBClass classToLoad, java.util.Date start, boolean lock, long[][] data, boolean ignoreMemoyUsage, int offset)
static java.lang.String	iLoadFieldCache(VirtualDB layer, DBClass rootClass, DBField field, RootClassHolder holder, java.util.HashMap filter, HashLongMap rows, boolean ignoreMemoyUsage, boolean checkMax) Load the cache for a field.
static java.lang.String	loadDataCache(VirtualDB layer, DBClass classToLoad, boolean lock, long[] rows, boolean ignoreMemoyUsage) Load the data cache.
static java.lang.String	loadDataCache(VirtualDB layer, DBClass classToLoad, boolean lock, PossibleRowsHolder pr, boolean ignoreMemoyUsage) Load the data cache.
static java.lang.String	loadDataCache(VirtualDB layer, DBClass classToLoad, boolean lock, java.lang.String filter, boolean ignoreMemoyUsage) Load the data cache.
static java.lang.String	loadFieldCache(VirtualDB layer, DBClass classToLoad, boolean ignoreMemoyUsage)
static java.lang.String	loadFieldCache(VirtualDB layer, DBClass rootClass, DBField field, boolean ignoreMemoyUsage) Load the field cache for this layer.
static void	simulateHeavyLoad(long sleepMS) simulate heavy load by sleeping in select spots.

Methods inherited from class java.lang.Object

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

Method Detail

simulateHeavyLoad

public static void simulateHeavyLoad(long sleepMS)

simulate heavy load by sleeping in select spots.

Parameters:

sleepMS - number of milliseconds to sleep

loadDataCache

public static java.lang.String loadDataCache(VirtualDB layer,
                                             DBClass classToLoad,
                                             boolean lock,
                                             java.lang.String filter,
                                             boolean ignoreMemoyUsage)
                                      throws java.lang.Exception

Load the data cache.

Parameters:

ignoreMemoyUsage -

layer - The layer to load for

filter - The filter to use

lock - Should lock in memory ?

classToLoad - The class

Returns:

status

Throws:

java.lang.Exception - a serious problem.

loadDataCache

public static java.lang.String loadDataCache(VirtualDB layer,
                                             DBClass classToLoad,
                                             boolean lock,
                                             long[] rows,
                                             boolean ignoreMemoyUsage)
                                      throws java.lang.Exception

Load the data cache.

Parameters:

ignoreMemoyUsage -

rows - The rows to load

layer - The layer to load for

lock - Should lock in memory ?

classToLoad - The class

Returns:

status

Throws:

java.lang.Exception - a serious problem.

loadDataCache

public static java.lang.String loadDataCache(VirtualDB layer,
                                             DBClass classToLoad,
                                             boolean lock,
                                             PossibleRowsHolder pr,
                                             boolean ignoreMemoyUsage)
                                      throws java.lang.Exception

Load the data cache.

Parameters:

ignoreMemoyUsage -

pr - The rows to load.

layer - The layer to load for

lock - Should lock in memory ?

classToLoad - The class

Returns:

status

Throws:

java.lang.Exception - a serious problem.

iLoadDataCache

public static java.lang.String iLoadDataCache(VirtualDB layer,
                                              DBClass classToLoad,
                                              java.util.Date start,
                                              boolean lock,
                                              long[][] data,
                                              boolean ignoreMemoyUsage,
                                              int offset)
                                       throws java.lang.Exception

Parameters:

layer - the layer

classToLoad -

start -

lock -

data -

ignoreMemoyUsage -

offset -

Returns:

the value

Throws:

java.lang.Exception - Exception A serious problem

loadFieldCache

public static java.lang.String loadFieldCache(VirtualDB layer,
                                              DBClass rootClass,
                                              DBField field,
                                              boolean ignoreMemoyUsage)
                                       throws java.lang.Exception

Load the field cache for this layer.

Parameters:

ignoreMemoyUsage -

rootClass -

layer - The layer to load

field - The field to load

Returns:

The status

Throws:

java.lang.Exception - A serious problem

loadFieldCache

public static java.lang.String loadFieldCache(VirtualDB layer,
                                              DBClass classToLoad,
                                              boolean ignoreMemoyUsage)
                                       throws java.lang.Exception

Parameters:

layer - the layer

classToLoad -

ignoreMemoyUsage -

Returns:

the value

Throws:

java.lang.Exception - a serious problem

iLoadFieldCache

public static java.lang.String iLoadFieldCache(VirtualDB layer,
                                               DBClass rootClass,
                                               DBField field,
                                               RootClassHolder holder,
                                               java.util.HashMap filter,
                                               HashLongMap rows,
                                               boolean ignoreMemoyUsage,
                                               boolean checkMax)
                                        throws java.lang.Exception

Load the cache for a field.

Parameters:

ignoreMemoyUsage -

rootClass - the root class

layer - The layer to load

field - The field to load

holder - The root holder

filter - The filter values

rows - record the rows.

checkMax - check the max

Returns:

The load status

Throws:

java.lang.Exception - A serious problem