27 lines
711 B
Java
27 lines
711 B
Java
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package services;
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import java.util.concurrent.atomic.AtomicInteger;
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import javax.inject.*;
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/**
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* This class is a concrete implementation of the {@link Counter} trait.
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* It is configured for Guice dependency injection in the {@link Module}
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* class.
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*
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* This class has a {@link Singleton} annotation because we need to make
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* sure we only use one counter per application. Without this
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* annotation we would get a new instance every time a {@link Counter} is
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* injected.
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*/
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@Singleton
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public class AtomicCounter implements Counter {
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private final AtomicInteger atomicCounter = new AtomicInteger();
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@Override
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public int nextCount() {
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return atomicCounter.getAndIncrement();
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}
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}
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