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Make FOSS build work with DummyKeyringModule

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DummyKeyringModule provides a fake string as the JSON credential used to instantiate a GoogleCredential. Of course this would not work and when the metric reporter requests a GoogleCredential in the main thread. This causes the FOSS build to crash on startup, because it defaults to use DummyKeyringModule.

This change allows a graceful handling of such an error by wrapping any calls to instantiate a metric reporter in a try block. Note that any attempt to write to stackdriver will still fail, but that happens in a different thread and will not make the whole program crash.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=177183337
This commit is contained in:
jianglai 2017-11-28 10:38:47 -08:00
parent e2db3f914e
commit e73325edcf
2 changed files with 30 additions and 26 deletions
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28
java/google/registry/module/frontend/FrontendServlet.java
View file

@ -39,23 +39,25 @@ public final class FrontendServlet extends HttpServlet {
public void init() {
Security.addProvider(new BouncyCastleProvider());
// If metric reporter failed to instantiate for any reason (bad keyring, bad json credential,
// etc), we log the error but keep the main thread running. Also the shutdown hook will only be
// registered if metric reporter starts up correctly.
try {
metricReporter.get().startAsync().awaitRunning(10, TimeUnit.SECONDS);
logger.info("Started up MetricReporter");
} catch (TimeoutException timeoutException) {
logger.severefmt("Failed to initialize MetricReporter: %s", timeoutException);
LifecycleManager.getInstance()
.setShutdownHook(
() -> {
try {
metricReporter.get().stopAsync().awaitTerminated(10, TimeUnit.SECONDS);
logger.info("Shut down MetricReporter");
} catch (TimeoutException timeoutException) {
logger.severefmt("Failed to stop MetricReporter: %s", timeoutException);
}
});
} catch (Exception e) {
logger.severefmt(e, "Failed to initialize MetricReporter: %s");
}
LifecycleManager.getInstance()
.setShutdownHook(
() -> {
try {
metricReporter.get().stopAsync().awaitTerminated(10, TimeUnit.SECONDS);
logger.info("Shut down MetricReporter");
} catch (TimeoutException timeoutException) {
logger.severefmt("Failed to stop MetricReporter: %s", timeoutException);
}
});
}
@Override