Created
May 19, 2014 15:12
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Witness library for Java.
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package com.feigdev.witness; | |
/** | |
* Created by ejf3 on 5/10/14. | |
*/ | |
public interface Reporter { | |
public void notifyEvent(Object o); | |
} |
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Learn more about bidirectional Unicode characters
package com.feigdev.witness; | |
import java.util.concurrent.*; | |
/** | |
* The witness is what | |
*/ | |
public class Witness { | |
private static ConcurrentMap<Class<?>, ConcurrentMap<Reporter, String>> events | |
= new ConcurrentHashMap<Class<?>, ConcurrentMap<Reporter, String>>(); | |
private static BlockingQueue<Runnable> queue = new LinkedBlockingQueue<Runnable>(); | |
private static ExecutorService executorService = new ThreadPoolExecutor(1, 10, 30, TimeUnit.SECONDS, queue); | |
public static void register(Class<?> event, Reporter reporter) { | |
if (null == event || null == reporter) | |
return; | |
events.putIfAbsent(event, new ConcurrentHashMap<Reporter, String>()); | |
events.get(event).putIfAbsent(reporter, ""); | |
} | |
public static void remove(Class<?> event, Reporter reporter) { | |
if (null == event || null == reporter) | |
return; | |
if (!events.containsKey(event)) | |
return; | |
events.get(event).remove(reporter); | |
} | |
public static void notify(final Object event) { | |
if (null == event) | |
return; | |
if (!events.containsKey(event.getClass())) | |
return; | |
for (final Reporter m : events.get(event.getClass()).keySet()) { | |
executorService.execute(new Runnable() { | |
@Override | |
public void run() { | |
m.notifyEvent(event); | |
} | |
}); | |
} | |
} | |
} |
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