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java.lang.Objectorg.geotools.factory.AbstractFactory
org.geotools.referencing.factory.ReferencingFactory
org.geotools.referencing.factory.AbstractAuthorityFactory
org.geotools.referencing.factory.BufferedAuthorityFactory
org.geotools.referencing.factory.DeferredAuthorityFactory
public abstract class DeferredAuthorityFactory
A buffered authority factory which will defer the creation of a backing store until when first needed. This approach allow to etablish a connection to a database (for example) only when first needed. In addition, the backing store can be automatically disposed after a timeout and recreated when needed again.
Field Summary |
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Fields inherited from class org.geotools.referencing.factory.ReferencingFactory |
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LOGGER |
Fields inherited from class org.geotools.factory.AbstractFactory |
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hints, MAXIMUM_PRIORITY, MINIMUM_PRIORITY, NORMAL_PRIORITY, priority |
Constructor Summary | |
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protected |
DeferredAuthorityFactory(Hints userHints,
int priority)
Constructs an instance without initial backing store. |
protected |
DeferredAuthorityFactory(Hints userHints,
int priority,
int maxStrongReferences)
Constructs an instance without initial backing store. |
Method Summary | |
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protected boolean |
canDisposeBackingStore(AbstractAuthorityFactory backingStore)
Returns true if the backing store can be disposed now. |
protected abstract AbstractAuthorityFactory |
createBackingStore()
Creates the backing store authority factory. |
void |
dispose()
Releases resources immediately instead of waiting for the garbage collector. |
static void |
exit()
Gets rid of the timer thread at application shutdown |
boolean |
isAvailable()
Returns true if this factory is available. |
boolean |
isConnected()
Returns true if this deferred factory is connected to its backing store. |
void |
setTimeout(long delay)
Set a timer for disposing the backing store after the specified amount of milliseconds of inactivity. |
Methods inherited from class org.geotools.referencing.factory.AbstractAuthorityFactory |
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noSuchAuthorityCode, trimAuthority |
Methods inherited from class org.geotools.referencing.factory.ReferencingFactory |
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ensureNonNull |
Methods inherited from class org.geotools.factory.AbstractFactory |
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addImplementationHints, equals, getImplementationHints, getPriority, hashCode, onDeregistration, onRegistration, toString |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface org.geotools.factory.Factory |
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getImplementationHints |
Constructor Detail |
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protected DeferredAuthorityFactory(Hints userHints, int priority)
createBackingStore()
method is
invoked.
userHints
- An optional set of hints, or null
if none.priority
- The priority for this factory, as a number between
MINIMUM_PRIORITY
and
MAXIMUM_PRIORITY
inclusive.createBackingStore()
protected DeferredAuthorityFactory(Hints userHints, int priority, int maxStrongReferences)
createBackingStore()
method is
invoked.
userHints
- An optional set of hints, or null
if none.priority
- The priority for this factory, as a number between
MINIMUM_PRIORITY
and
MAXIMUM_PRIORITY
inclusive.maxStrongReferences
- The maximum number of objects to keep by strong reference.createBackingStore()
Method Detail |
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public boolean isAvailable()
true
if this factory is available. The default implementation returns
false
if createBackingStore()
throws an exception.
isAvailable
in interface OptionalFactory
protected abstract AbstractAuthorityFactory createBackingStore() throws org.opengis.referencing.FactoryException
createXXX(...)
method is invoked.
createXXX(...)
methods.
FactoryNotFoundException
- if the backing store has not been found.
org.opengis.referencing.FactoryException
- if the creation of backing store failed for an other reason.public boolean isConnected()
true
if this deferred factory is connected to its backing store.
This method returns false
if no createFoo
method has been invoked,
if the backing store has been automatically disposed after the timeout or if this factoy has been disposed.
public void setTimeout(long delay)
createBackingStore()
method will be responsible for creating a new
backing store when needed. Note that the backing store disposal can be vetoed if
canDisposeBackingStore(org.geotools.referencing.factory.AbstractAuthorityFactory)
returns false
.
delay
- The minimal delay before to close the backing store. This delay is very
approximative. The backing store will not be closed before, but may take as
much as twice that time before to be closed.protected boolean canDisposeBackingStore(AbstractAuthorityFactory backingStore)
true
if the backing store can be disposed now. This method is invoked
automatically after the amount of time specified by setTimeout(long)
if the factory
were not used during that time. The default implementation always returns true
.
Subclasses should override this method and returns false
if they want to prevent
the backing store disposal under some circonstances.
backingStore
- The backing store in process of being disposed.public void dispose() throws org.opengis.referencing.FactoryException
canDisposeBackingStore(org.geotools.referencing.factory.AbstractAuthorityFactory)
value.
dispose
in class BufferedAuthorityFactory
org.opengis.referencing.FactoryException
- if an error occured while disposing the factory.public static void exit()
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