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83 lines
3.3 KiB
Java
83 lines
3.3 KiB
Java
// Copyright 2018 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.module;
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import com.google.appengine.api.LifecycleManager;
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import com.google.common.flogger.FluentLogger;
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import com.google.monitoring.metrics.MetricReporter;
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import dagger.Lazy;
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import google.registry.request.RequestHandler;
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import google.registry.util.SystemClock;
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import java.io.IOException;
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import java.security.Security;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.TimeoutException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.bouncycastle.jce.provider.BouncyCastleProvider;
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import org.joda.time.DateTime;
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/** Base for Servlets that handle all requests to our App Engine modules. */
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public class ServletBase extends HttpServlet {
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private final RequestHandler<?> requestHandler;
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private final Lazy<MetricReporter> metricReporter;
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private static final FluentLogger logger = FluentLogger.forEnclosingClass();
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private static final SystemClock clock = new SystemClock();
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public ServletBase(RequestHandler<?> requestHandler, Lazy<MetricReporter> metricReporter) {
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this.requestHandler = requestHandler;
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this.metricReporter = metricReporter;
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}
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@Override
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public void init() {
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Security.addProvider(new BouncyCastleProvider());
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// If metric reporter failed to instantiate for any reason (bad keyring, bad json credential,
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// etc), we log the error but keep the main thread running. Also the shutdown hook will only be
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// registered if metric reporter starts up correctly.
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try {
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metricReporter.get().startAsync().awaitRunning(10, TimeUnit.SECONDS);
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logger.atInfo().log("Started up MetricReporter");
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LifecycleManager.getInstance()
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.setShutdownHook(
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() -> {
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try {
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metricReporter.get().stopAsync().awaitTerminated(10, TimeUnit.SECONDS);
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logger.atInfo().log("Shut down MetricReporter");
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} catch (TimeoutException e) {
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logger.atSevere().withCause(e).log("Failed to stop MetricReporter.");
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}
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});
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} catch (Exception e) {
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logger.atSevere().withCause(e).log("Failed to initialize MetricReporter.");
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}
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}
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@Override
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public void service(HttpServletRequest req, HttpServletResponse rsp) throws IOException {
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logger.atInfo().log("Received %s request", getClass().getSimpleName());
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DateTime startTime = clock.nowUtc();
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try {
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requestHandler.handleRequest(req, rsp);
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} finally {
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logger.atInfo().log(
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"Finished %s request. Latency: %.3fs",
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getClass().getSimpleName(), (clock.nowUtc().getMillis() - startTime.getMillis()) / 1000d);
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}
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}
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}
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