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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;
Used to capture the input stream throughput metrics, but excluding the API.

Note this class is only relevant when metric is enabled. Otherwise it should not even be involved in the call stack to minimize runtime overhead.

    private final ByteThroughputHelper helper;
         = new ByteThroughputHelper(type);
    public int read(byte b[], int offint lenthrows IOException {
        long startNano = .startTiming();
        int bytesRead = .read(bofflen);
        if (bytesRead > 0) {
        return bytesRead;
    public void close() throws IOException {
    public final boolean isMetricActivated() {
        return true;
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