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a50ef39c04
We're going to need to switch away from Guava's Functions and Predicates for everything and replace them with the java.util versions. Unfortunately there does not appear to be an automated tool to do this all at once. Refaster got close but doesn't seem to care about these particular types of mismatch (I suspect we're using a different version of the JDK than the outside world; ours is OK with Guava classes). This also bumps up Guava to 0.23, which is needed for some new functionality used in combination with Java 8 features. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=170531539
71 lines
2.4 KiB
Java
71 lines
2.4 KiB
Java
// Copyright 2017 The Nomulus Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.server;
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import static com.google.common.base.Throwables.throwIfUnchecked;
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import static java.util.concurrent.Executors.newCachedThreadPool;
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import com.google.common.util.concurrent.SimpleTimeLimiter;
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import java.io.IOException;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.util.concurrent.Callable;
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import java.util.concurrent.TimeUnit;
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import javax.annotation.Nullable;
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final class UrlChecker {
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private static final int READ_TIMEOUT_MS = 1000;
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private static final int CONNECT_TIMEOUT_MS = 500;
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/** Probes {@code url} until it becomes available. */
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static void waitUntilAvailable(final URL url, int timeoutMs) {
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try {
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SimpleTimeLimiter.create(newCachedThreadPool()).callWithTimeout(new Callable<Void>() {
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@Nullable
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@Override
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public Void call() throws InterruptedException, IOException {
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int exponentialBackoffMs = 1;
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while (true) {
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if (isAvailable(url)) {
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return null;
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}
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Thread.sleep(exponentialBackoffMs *= 2);
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}
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}
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}, timeoutMs, TimeUnit.MILLISECONDS);
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} catch (Exception e) {
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throwIfUnchecked(e);
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throw new RuntimeException(e);
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}
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}
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/** Returns {@code true} if page is available and returns {@code 200 OK}. */
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static boolean isAvailable(URL url) throws IOException {
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HttpURLConnection connection = (HttpURLConnection) url.openConnection();
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connection.setConnectTimeout(CONNECT_TIMEOUT_MS);
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connection.setReadTimeout(READ_TIMEOUT_MS);
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try {
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connection.connect();
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return connection.getResponseCode() == HttpURLConnection.HTTP_OK;
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} catch (IOException e) {
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return false;
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} finally {
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connection.disconnect();
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}
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}
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private UrlChecker() {}
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}
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