netbout-spi-1.4.8.src.main.java.com.netbout.spi.client.EtaAssertion Maven / Gradle / Ivy
/**
* Copyright (c) 2009-2012, Netbout.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
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* copyright notice, this list of conditions and the following
* disclaimer. 2) Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution. 3) Neither the name of the NetBout.com nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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package com.netbout.spi.client;
import com.jcabi.log.Logger;
import com.rexsl.test.AssertionPolicy;
import com.rexsl.test.TestResponse;
import java.net.HttpURLConnection;
import java.util.concurrent.TimeUnit;
/**
* Asserts that {@code /page/eta} equals to zero.
*
* @author Yegor Bugayenko ([email protected])
* @version $Id: EtaAssertion.java 3116 2012-08-02 18:28:36Z guard $
*/
public final class EtaAssertion implements AssertionPolicy {
/**
* Minimum delay in nanosec.
*/
private static final long MIN_DELAY = 5 * 1000L * 1000 * 1000;
/**
* Maximum delay in nanosec.
*/
private static final long MAX_DELAY = 5 * 60 * 1000L * 1000 * 1000;
/**
* Recently detected ETA.
*/
private transient Long eta = 0L;
/**
* {@inheritDoc}
*/
@Override
public void assertThat(final TestResponse response) {
if (response.getStatus() == HttpURLConnection.HTTP_OK) {
response.assertXPath("/page/identity/eta");
this.eta = Long.valueOf(
response.xpath("/page/identity/eta/text()").get(0)
);
if (this.eta > 0) {
Logger.warn(
this,
// @checkstyle LineLength (1 line)
"assertThat(..): ETA=%[nano]s reported for '%s', the page is not ready",
this.eta,
response.xpath("/page/identity/name/text()").get(0)
);
throw new AssertionError();
}
} else if (response.getStatus() == HttpURLConnection.HTTP_UNAVAILABLE) {
this.eta = 1L;
Logger.warn(
this,
"assertThat(..): service is temporary unavailable"
);
throw new AssertionError();
}
}
/**
* {@inheritDoc}
*/
@Override
public boolean isRetryNeeded(final int attempt) {
boolean again = false;
if (this.eta > 0) {
again = true;
final long delay = Math.min(
Math.max(
this.eta * attempt,
EtaAssertion.MIN_DELAY * attempt * 2
),
EtaAssertion.MAX_DELAY
);
Logger.warn(
this,
"again(attempt #%d): let's wait %[nano]s and try again",
attempt,
delay
);
try {
TimeUnit.NANOSECONDS.sleep(delay);
} catch (InterruptedException ex) {
throw new IllegalStateException(ex);
}
}
return again;
}
}