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java.lang.Objectorg.oddjob.logging.cache.SimpleCounter
public class SimpleCounter
A counter which counts many things and executes an action when the count of things reaches zero or a thing is first created.
Constructor Summary | |
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SimpleCounter()
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Method Summary | |
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void |
add(Object key)
Add an object to be counted without an action. |
void |
add(Object key,
Runnable newAction)
Add a thing to be counted, and the action to execute if this is the first thing to be counted. |
void |
remove(Object key)
Remove an object taking no action if the count of that object reaches 0. |
void |
remove(Object key,
Runnable emptyAction)
Remove an object from the count. |
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 SimpleCounter()
Method Detail |
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public void add(Object key)
key
- The object to count.public void add(Object key, Runnable newAction)
key
- The thing to count.newAction
- The action to take if this is the first thing.public void remove(Object key) throws IllegalStateException
key
- The object to remove from the count.
IllegalStateException
- If the object was never counted.public void remove(Object key, Runnable emptyAction) throws IllegalStateException
key
- The object that will decrement the count.emptyAction
- Action to take when the count is 0.
IllegalStateException
- If the object was never counted.
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