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  * Copyright 2010-2015, Inc. or its affiliates. All Rights Reserved.
  * Licensed under the Apache License, Version 2.0 (the "License").
  * You may not use this file except in compliance with the License.
  * A copy of the License is located at
 * or in the "license" file accompanying this file. This file is distributed
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
package com.amazonaws.metrics;

A service provider interface that can be used to implement an AWS SDK general purpose metric collector.
public abstract class ServiceMetricCollector {
    public static interface Factory {
Returns an instance of the collector; or null if if failed to create one.
Collects metrics on the number of bytes written or read and the respective duration.
    public abstract void collectByteThroughput(ByteThroughputProvider provider);
Collects metrics for non-request specific latencies.
    public abstract void collectLatency(ServiceLatencyProvider provider);
    public boolean isEnabled() { return true; }
A convenient instance of a no-op service metric collector.
    public static final ServiceMetricCollector NONE = new ServiceMetricCollector() {
        @Override public void collectByteThroughput(ByteThroughputProvider provider) {}
        @Override public void collectLatency(ServiceLatencyProvider provider) {}
        @Override public boolean isEnabled() { return false; }
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