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1
4 package com.tc.stats.counter.sampled;
5
6 import com.tc.util.TCTimerImpl;
7
8 import java.util.Timer  ;
9
10 public class SampledCounterManagerImpl implements SampledCounterManager {
11 private final Timer timer = new TCTimerImpl("SampledCounterManager Timer", true);
12 private boolean shutdown = false;
13
14 public SampledCounterManagerImpl() {
15 super();
16 }
17
18 public synchronized void shutdown() {
19 if (shutdown) { return; }
20 try {
21 timer.cancel();
22 } finally {
23 shutdown = true;
24 }
25 }
26
27 public synchronized SampledCounter createCounter(SampledCounterConfig config) {
28 if (shutdown) { throw new IllegalStateException ("counter manager is shutdown"); }
29 if (config == null) { throw new NullPointerException ("config cannot be null"); }
30
31 final SampledCounterImpl counter = new SampledCounterImpl(config);
32
33 final long period = config.getIntervalSecs() * 1000;
34 timer.schedule(counter.getTimerTask(), period, period);
35
36 return counter;
37 }
38
39 }
40 |
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