/*
* Copyright 2017 LINE Corporation
*
* LINE Corporation licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License 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.
*/
/*
* Copyright 2014, Google Inc. All rights reserved.
*
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* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
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* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
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* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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package com.linecorp.armeria.internal.grpc;
import static com.google.common.base.Preconditions.checkArgument;
import java.util.concurrent.TimeUnit;
/**
* Marshals a nanoseconds representation of the timeout to and from a string representation,
* consisting of an ASCII decimal representation of a number with at most 8 digits, followed by a
* unit:
* n = nanoseconds
* u = microseconds
* m = milliseconds
* S = seconds
* M = minutes
* H = hours
*
* <p>The representation is greedy with respect to precision. That is, 2 seconds will be
* represented as `2000000u`.</p>
*
* <p>See <a href="https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests">the
* request header definition</a></p>
*/
public final class TimeoutHeaderUtil {
/**
* Serialize the given timeout to a {@link String}.
*/
public static String toHeaderValue(long timeoutNanos) {
long cutoff = 100000000;
if (timeoutNanos < 0) {
throw new IllegalArgumentException("Timeout too small");
} else if (timeoutNanos < cutoff) {
return TimeUnit.NANOSECONDS.toNanos(timeoutNanos) + "n";
} else if (timeoutNanos < cutoff * 1000L) {
return TimeUnit.NANOSECONDS.toMicros(timeoutNanos) + "u";
} else if (timeoutNanos < cutoff * 1000L * 1000L) {
return TimeUnit.NANOSECONDS.toMillis(timeoutNanos) + "m";
} else if (timeoutNanos < cutoff * 1000L * 1000L * 1000L) {
return TimeUnit.NANOSECONDS.toSeconds(timeoutNanos) + "S";
} else if (timeoutNanos < cutoff * 1000L * 1000L * 1000L * 60L) {
return TimeUnit.NANOSECONDS.toMinutes(timeoutNanos) + "M";
} else {
return TimeUnit.NANOSECONDS.toHours(timeoutNanos) + "H";
}
}
/**
* Parse the timeout from the {@link String}.
*/
public static long fromHeaderValue(String serialized) {
checkArgument(serialized.length() > 0, "empty timeout");
checkArgument(serialized.length() <= 9, "bad timeout format");
long value = Long.parseLong(serialized.substring(0, serialized.length() - 1));
char unit = serialized.charAt(serialized.length() - 1);
switch (unit) {
case 'n':
return TimeUnit.NANOSECONDS.toNanos(value);
case 'u':
return TimeUnit.MICROSECONDS.toNanos(value);
case 'm':
return TimeUnit.MILLISECONDS.toNanos(value);
case 'S':
return TimeUnit.SECONDS.toNanos(value);
case 'M':
return TimeUnit.MINUTES.toNanos(value);
case 'H':
return TimeUnit.HOURS.toNanos(value);
default:
throw new IllegalArgumentException(String.format("Invalid timeout unit: %s", unit));
}
}
private TimeoutHeaderUtil() {}
}