@@ -17,11 +17,12 @@
 
 package org.apache.servicecomb.metrics.core.monitor;
 
+import java.util.HashMap;
+import java.util.Map;
 
-import org.apache.servicecomb.metrics.common.ConsumerInvocationMetric;
-import org.apache.servicecomb.metrics.common.MetricsConst;
+import org.apache.servicecomb.foundation.metrics.MetricsConst;
 
-public class ConsumerInvocationMonitor extends InvocationMonitor {
+public class ConsumerInvocationMonitor {
   private final TimerMonitor consumerLatency;
 
   private final CallMonitor consumerCall;
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package org.apache.servicecomb.metrics.core.monitor;


import org.apache.servicecomb.metrics.common.ConsumerInvocationMetric;
import org.apache.servicecomb.metrics.common.MetricsConst;

public class ConsumerInvocationMonitor extends InvocationMonitor {
  private final TimerMonitor consumerLatency;

  private final CallMonitor consumerCall;

  public TimerMonitor getConsumerLatency() {
    return consumerLatency;
  }

  public CallMonitor getConsumerCall() {
    return consumerCall;
  }

  public ConsumerInvocationMonitor(String operationName) {
    super(operationName, String.format(MetricsConst.CONSUMER_PREFIX_TEMPLATE, operationName));
    this.consumerLatency = new TimerMonitor(this.getPrefix() + ".consumerLatency");
    this.consumerCall = new CallMonitor(this.getPrefix() + ".consumerCall");
  }

  public ConsumerInvocationMetric toMetric(int windowTimeIndex) {
    return new ConsumerInvocationMetric(this.getOperationName(), this.getPrefix(),
        consumerLatency.toMetric(windowTimeIndex), consumerCall.toMetric(windowTimeIndex));
  }
}

What we should do if we want to change the ConsumerInvocationMonitor into ProducerInvocationMonitor?We don't need to write lots Classes here, please use abstraction to reduce the number of the class.