org.apache.inlong.sort.filesystem.shaded.com.amazonaws.metrics.MetricFilterInputStream Maven / Gradle / Ivy
/*
* Copyright 2010-2022 Amazon.com, 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
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package com.amazonaws.metrics;
import java.io.IOException;
import java.io.InputStream;
import com.amazonaws.internal.SdkFilterInputStream;
/**
* Used to capture the input stream throughput metrics, but excluding the
* {@link #read()} 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.
*/
public class MetricFilterInputStream extends SdkFilterInputStream {
private final ByteThroughputHelper helper;
public MetricFilterInputStream(ThroughputMetricType type, InputStream in) {
super(in);
helper = new ByteThroughputHelper(type);
}
@Override
public int read(byte b[], int off, int len) throws IOException {
abortIfNeeded();
long startNano = helper.startTiming();
int bytesRead = in.read(b, off, len);
if (bytesRead > 0) {
helper.increment(bytesRead, startNano);
}
return bytesRead;
}
@Override
public void close() throws IOException {
helper.reportMetrics();
in.close();
abortIfNeeded();
}
@Override
public final boolean isMetricActivated() {
return true;
}
}