net.messagevortex.asn1

Class AsymmetricKeyPreCalculator

java.lang.Object

net.messagevortex.asn1.AsymmetricKeyPreCalculator

All Implemented Interfaces:

Serializable, Callable<Integer>

public class AsymmetricKeyPreCalculator
extends Object
implements Serializable, Callable<Integer>

This is a class to precalculate keys.

It is disabled by default. Enable it by setting a caching file Name. To disable set the name to null.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	DEFAULT_CACHE_FILENAME
static long	serialVersionUID

Method Summary

Modifier and Type	Method and Description
Integer	call()
static void	fillCache() Commandline handler to pre-populate the key cache.
static String	getCacheFileName() Gets the currently set filename for key pre-calculation.
static int	getNumThreads() Get the number of maximum threads used for cache pre-calculation.
static AsymmetricKey	getPrecomputedAsymmetricKey(AlgorithmParameter parameters) retrieves a precomputed key from the cache.
void	listCache() Command line helper to list cached items.
void	removeCacheElement() Command line helper to remove a cached item type from the cache.
void	removeCacheElement(int index) Remove a the specified item type from the cache.
static String	setCacheFileName(String name) Set name of cache file.
void	setCacheSize() Command line helper to set the maximum cache size of a cached item.
void	setCacheSize(int index, int size) Set the maximum cache size of a cached item.
static int	setNumThreads(int newNumThreads) Set the maximum number of working threads for the cache pre-calculator.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_CACHE_FILENAME

public static final String DEFAULT_CACHE_FILENAME

See Also:

Constant Field Values

serialVersionUID

public static final long serialVersionUID

See Also:

Constant Field Values

Method Detail

getPrecomputedAsymmetricKey

public static AsymmetricKey getPrecomputedAsymmetricKey(AlgorithmParameter parameters)

retrieves a precomputed key from the cache.

Parameters:

parameters - the parameters reflecting the requested key

Returns:

the requested key

setNumThreads

public static int setNumThreads(int newNumThreads)

Set the maximum number of working threads for the cache pre-calculator.

Parameters:

newNumThreads - the number of threads used for pre-calculation

Returns:

the previously set number of threads

getNumThreads

public static int getNumThreads()

Get the number of maximum threads used for cache pre-calculation.

Returns:

the currently set number of threads

getCacheFileName

public static String getCacheFileName()

Gets the currently set filename for key pre-calculation.

Returns:

the currently set filename

setCacheFileName

public static String setCacheFileName(String name)

Set name of cache file.

If set to null the pre-calculator is disabled.

Parameters:

name - file name of the cache file

Returns:

String representing the previously set name

Throws:

IllegalThreadStateException - if the previous thread has not yet shutdown but a new thread was tried to be started

fillCache

public static void fillCache()

Commandline handler to pre-populate the key cache.

call

public Integer call()
             throws IOException

Specified by:

call in interface Callable<Integer>

Throws:

IOException

setCacheSize

public void setCacheSize()
                  throws IOException

Command line helper to set the maximum cache size of a cached item.

Throws:

IOException - if the specified file is not fond or there was an error when reading

setCacheSize

public void setCacheSize(int index,
                         int size)
                  throws IOException

Set the maximum cache size of a cached item.

Parameters:

index - the index of the cached item

size - the size to be set

Throws:

IOException - if the specified file is not fond or there was an error when reading

removeCacheElement

public void removeCacheElement()
                        throws IOException

Command line helper to remove a cached item type from the cache.

Throws:

IOException - if the specified file is not fond or there was an error when reading

removeCacheElement

public void removeCacheElement(int index)
                        throws IOException

Remove a the specified item type from the cache.

Parameters:

index - the index of the element to be removed

Throws:

IOException - if the specified file is not fond or there was an error when reading

listCache

public void listCache()
               throws IOException

Command line helper to list cached items.

Throws:

IOException - if the specified file is not fond or there was an error when reading