Package org.apache.commons.pool.impl
Class EvictionTimer
- java.lang.Object
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- org.apache.commons.pool.impl.EvictionTimer
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class EvictionTimer extends java.lang.Object
Provides a shared idle object eviction timer for all pools. This class wraps the standard
Timer
and keeps track of how many pools are using it. If no pools are using the timer, it is canceled. This prevents a thread being left running which, in application server environments, can lead to memory leads and/or prevent applications from shutting down or reloading cleanly.This class has package scope to prevent its inclusion in the pool public API. The class declaration below should *not* be changed to public.
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Nested Class Summary
Nested Classes Modifier and Type Class Description private static class
EvictionTimer.PrivilegedGetTccl
PrivilegedAction
used to get the ContextClassLoaderprivate static class
EvictionTimer.PrivilegedSetTccl
PrivilegedAction
used to set the ContextClassLoader
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Field Summary
Fields Modifier and Type Field Description private static java.util.Timer
_timer
Timer instanceprivate static int
_usageCount
Static usage count tracker
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Constructor Summary
Constructors Modifier Constructor Description private
EvictionTimer()
Prevent instantiation
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description (package private) static void
cancel(java.util.TimerTask task)
Remove the specified eviction task from the timer.(package private) static void
schedule(java.util.TimerTask task, long delay, long period)
Add the specified eviction task to the timer.
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Method Detail
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schedule
static void schedule(java.util.TimerTask task, long delay, long period)
Add the specified eviction task to the timer. Tasks that are added with a call to this method *must* callcancel(TimerTask)
to cancel the task to prevent memory and/or thread leaks in application server environments.- Parameters:
task
- Task to be scheduleddelay
- Delay in milliseconds before task is executedperiod
- Time in milliseconds between executions
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cancel
static void cancel(java.util.TimerTask task)
Remove the specified eviction task from the timer.- Parameters:
task
- Task to be scheduled
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