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package com.yammer.metrics.spring;

import org.aopalliance.intercept.MethodInterceptor;
import org.springframework.aop.Pointcut;
import org.springframework.aop.framework.ProxyConfig;
import org.springframework.aop.support.annotation.AnnotationMatchingPointcut;

import com.yammer.metrics.annotation.Metered;
import com.yammer.metrics.core.MetricsRegistry;

public class MeteredAnnotationBeanPostProcessor extends AbstractProxyingBeanPostProcessor {

    private static final long serialVersionUID = 3513098435344496676L;

    private final Pointcut pointcut = new AnnotationMatchingPointcut(null, Metered.class);
    private final MetricsRegistry metrics;
    private final String scope;

    public MeteredAnnotationBeanPostProcessor(final MetricsRegistry metrics, final ProxyConfig config, final String scope) {
        this.metrics = metrics;
        this.scope = scope;

        this.copyFrom(config);
    }

    @Override
    public Pointcut getPointcut() {
        return pointcut;
    }

    @Override
    public MethodInterceptor getMethodInterceptor(Class targetClass) {
        return new MeteredMethodInterceptor(metrics, targetClass, scope);
    }

}