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Cumulus4j API (1.0.1) |
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java.lang.Objectorg.cumulus4j.store.crypto.AbstractCryptoManager
public abstract class AbstractCryptoManager
Abstract base-class for implementing CryptoManager
s.
This class already implements a mechanism to close expired CryptoSession
s
periodically (see getCryptoSessionExpiryAge()
and getCryptoSessionExpiryTimerPeriod()
).
Field Summary |
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Fields inherited from interface org.cumulus4j.store.crypto.CryptoManager |
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MAC_ALGORITHM_NONE, PROPERTY_CRYPTO_MANAGER_ID, PROPERTY_CRYPTO_SESSION_EXPIRY_AGE, PROPERTY_CRYPTO_SESSION_EXPIRY_TIMER_ENABLED, PROPERTY_CRYPTO_SESSION_EXPIRY_TIMER_PERIOD, PROPERTY_ENCRYPTION_ALGORITHM, PROPERTY_MAC_ALGORITHM |
Constructor Summary | |
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AbstractCryptoManager()
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Method Summary | |
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protected void |
closeExpiredCryptoSessions(boolean force)
Close expired CryptoSession s. |
protected abstract CryptoSession |
createCryptoSession()
Create a new instance of a class implementing CryptoSession . |
String |
getCryptoManagerID()
Get the cryptoManagerID of this instance. |
CryptoManagerRegistry |
getCryptoManagerRegistry()
Get the registry which manages this CryptoManager . |
CryptoSession |
getCryptoSession(String cryptoSessionID)
Get the CryptoSession identified by the given cryptoSessionID . |
protected long |
getCryptoSessionExpiryAge()
Get the age after which an unused session expires. |
protected boolean |
getCryptoSessionExpiryTimerEnabled()
Get the enabled status of the timer used to cleanup. |
protected long |
getCryptoSessionExpiryTimerPeriod()
Get the period in which expired crypto sessions are searched and closed. |
String |
getEncryptionAlgorithm()
Get the value of the property "cumulus4j.encryptionAlgorithm". |
String |
getMACAlgorithm()
Get the value of the property "cumulus4j.macAlgorithm". |
void |
onCloseCryptoSession(CryptoSession cryptoSession)
Notify the CryptoManager about the fact that a session is currently being closed. |
void |
setCryptoManagerID(String cryptoManagerID)
Set the cryptoManagerID of this instance. |
void |
setCryptoManagerRegistry(CryptoManagerRegistry cryptoManagerRegistry)
Set the registry which manages this CryptoManager . |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public AbstractCryptoManager()
Method Detail |
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protected long getCryptoSessionExpiryTimerPeriod()
Get the period in which expired crypto sessions are searched and closed.
This value can be configured using the persistence property .
CryptoManager.PROPERTY_CRYPTO_SESSION_EXPIRY_TIMER_PERIOD
,
CryptoManager.PROPERTY_CRYPTO_SESSION_EXPIRY_TIMER_ENABLED
protected boolean getCryptoSessionExpiryTimerEnabled()
Get the enabled status of the timer used to cleanup.
This value can be configured using the persistence property .
CryptoManager.PROPERTY_CRYPTO_SESSION_EXPIRY_TIMER_ENABLED
,
CryptoManager.PROPERTY_CRYPTO_SESSION_EXPIRY_TIMER_PERIOD
protected long getCryptoSessionExpiryAge()
Get the age after which an unused session expires.
This value can be configured using the persistence property .
A CryptoSession
expires when its lastUsageTimestamp
is longer in the past than this expiry age. Note, that the session might be kept longer, because a
timer checks periodically
for expired sessions.
CryptoManager.PROPERTY_CRYPTO_SESSION_EXPIRY_AGE
protected void closeExpiredCryptoSessions(boolean force)
Close expired CryptoSession
s. If force == false
, it does so only periodically.
This method is called by getCryptoSession(String)
with force == false
, if the timer
is disabled timer-period == 0
. If the timer is enabled,
it is called periodically by the timer with force == true
.
force
- whether to force the cleanup now or only do it periodically.CryptoManager.PROPERTY_CRYPTO_SESSION_EXPIRY_AGE
,
CryptoManager.PROPERTY_CRYPTO_SESSION_EXPIRY_TIMER_PERIOD
public CryptoManagerRegistry getCryptoManagerRegistry()
CryptoManager
CryptoManager
.
This method should normally never return null
, because
the registry is set
immediately
after instantiation.
getCryptoManagerRegistry
in interface CryptoManager
CryptoManager
.CryptoManager.setCryptoManagerRegistry(CryptoManagerRegistry)
public void setCryptoManagerRegistry(CryptoManagerRegistry cryptoManagerRegistry)
CryptoManager
CryptoManager
.
This method is called by the CryptoManagerRegistry
whenever
it creates a new instance of CryptoManager
.
setCryptoManagerRegistry
in interface CryptoManager
CryptoManager.getCryptoManagerRegistry()
public String getCryptoManagerID()
CryptoManager
Get the cryptoManagerID
of this instance.
The cryptoManagerID
is configured in the plugin.xml
when registering an extension
to the extension-point org.cumulus4j.api.cryptoManager
. It is then used by the client to
specify which method of key-exchange (or key-management in general) and encryption/decryption is desired.
This is done by setting the property CryptoManager.PROPERTY_CRYPTO_MANAGER_ID
.
This method is thread-safe.
getCryptoManagerID
in interface CryptoManager
cryptoManagerID
of this instance.public void setCryptoManagerID(String cryptoManagerID)
CryptoManager
Set the cryptoManagerID
of this instance.
This method is called with the value configured in the plugin.xml
directly after instantiating the CryptoManager
.
You must never directly call this method! It is not an API method!
setCryptoManagerID
in interface CryptoManager
cryptoManagerID
- the identifier to set.CryptoManager.getCryptoManagerID()
protected abstract CryptoSession createCryptoSession()
Create a new instance of a class implementing CryptoSession
.
This method is called by getCryptoSession(String)
, if it needs a new CryptoSession
instance.
Implementors should simply instantiate and return their implementation of
CryptoSession
. It is not necessary to call CryptoSession.setCryptoSessionID(String)
and the like here - this is automatically done afterwards by getCryptoSession(String)
.
CryptoSession
instance.public CryptoSession getCryptoSession(String cryptoSessionID)
CryptoManager
Get the CryptoSession
identified by the given cryptoSessionID
.
Usually, every client opens one crypto-session. How exactly this happens, is highly dependent
on the CryptoManager
and CryptoSession
implementation. The
cryptoSessionID
is then passed from the client to
the server which itself passes it to the PersistenceManager
(or EntityManager
)
via the property with the name CryptoSession.PROPERTY_CRYPTO_SESSION_ID
.
Calling this method with a non-existing cryptoSessionID
implicitely creates
a CryptoSession
instance and returns it. A future call to this method with the same
cryptoSessionID
returns the same CryptoSession
instance.
A CryptoSession
should only be kept in the memory of a CryptoManager
for a limited time.
It is recommended to remove it
a short configurable time (e.g. 10 minutes) after the last usage
.
This method must call CryptoSession.updateLastUsageTimestamp()
.
This method is thread-safe.
getCryptoSession
in interface CryptoManager
cryptoSessionID
- the cryptoSessionID
for which to look up or
create a CryptoSession
.
CryptoSession
identified by the given identifier; never null
.public void onCloseCryptoSession(CryptoSession cryptoSession)
CryptoManager
Notify the CryptoManager
about the fact that a session is currently being closed.
Important: This method must never be called directly! It must be called by CryptoSession.close()
.
onCloseCryptoSession
in interface CryptoManager
cryptoSession
- the session that is currently closed.public String getEncryptionAlgorithm()
CryptoManager
getEncryptionAlgorithm
in interface CryptoManager
CryptoManager.PROPERTY_ENCRYPTION_ALGORITHM
public String getMACAlgorithm()
CryptoManager
getMACAlgorithm
in interface CryptoManager
CryptoManager.PROPERTY_MAC_ALGORITHM
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Cumulus4j API (1.0.1) |
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