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[FSSDK-8739] refact: Implements a warning log for polling interval less than 30s #528

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merged 2 commits into from
Aug 3, 2023
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[FSSDK-8739] refact: Implements a warning log for polling interval less than 30s #528

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7577afa
Added warning upon setting polling time period below 30 ms
mnoman09 Jul 31, 2023
7ed7323
Updated test and changed expecting time to lower than 30 seconds
mnoman09 Aug 2, 2023
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4 changes: 3 additions & 1 deletion core-api/src/main/java/com/optimizely/ab/config/PollingProjectConfigManager.java
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Original file line number Diff line number Diff line change
Expand Up @@ -75,7 +75,9 @@ public PollingProjectConfigManager(long period, TimeUnit timeUnit, long blocking
this.blockingTimeoutPeriod = blockingTimeoutPeriod;
this.blockingTimeoutUnit = blockingTimeoutUnit;
this.notificationCenter = notificationCenter;

if (TimeUnit.SECONDS.convert(period, this.timeUnit) < 30) {
logger.warn("Polling intervals below 30 seconds are not recommended.");
}
final ThreadFactory threadFactory = Executors.defaultThreadFactory();
this.scheduledExecutorService = Executors.newSingleThreadScheduledExecutor(runnable -> {
Thread thread = threadFactory.newThread(runnable);
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30 changes: 25 additions & 5 deletions core-api/src/test/java/com/optimizely/ab/config/PollingProjectConfigManagerTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -16,13 +16,15 @@
*/
package com.optimizely.ab.config;

import ch.qos.logback.classic.Level;
import com.optimizely.ab.internal.LogbackVerifier;
import com.optimizely.ab.internal.NotificationRegistry;
import com.optimizely.ab.notification.NotificationCenter;
import com.optimizely.ab.notification.UpdateConfigNotification;
import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import org.junit.*;
import org.junit.rules.ExpectedException;
import org.junit.rules.RuleChain;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CountDownLatch;
Expand All @@ -41,6 +43,13 @@ public class PollingProjectConfigManagerTest {
private static final TimeUnit POLLING_UNIT = TimeUnit.MILLISECONDS;
private static final int PROJECT_CONFIG_DELAY = 100;

public ExpectedException thrown = ExpectedException.none();
public LogbackVerifier logbackVerifier = new LogbackVerifier();

@Rule
@SuppressFBWarnings("URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")
public RuleChain ruleChain = RuleChain.outerRule(thrown)
.around(logbackVerifier);
private TestProjectConfigManager testProjectConfigManager;
private ProjectConfig projectConfig;

Expand Down Expand Up @@ -228,6 +237,13 @@ public void testUpdateConfigNotificationGetsTriggered() throws InterruptedExcept
assertTrue(countDownLatch.await(500, TimeUnit.MILLISECONDS));
}

@Test
public void testSettingUpLowerPollingPeriodResultsInWarning() throws InterruptedException {
long pollingPeriod = 29;
new TestProjectConfigManager(projectConfig, pollingPeriod, TimeUnit.SECONDS, pollingPeriod / 2, TimeUnit.SECONDS, new NotificationCenter());
logbackVerifier.expectMessage(Level.WARN, "Polling intervals below 30 seconds are not recommended.");
}

@Test
public void testUpdateConfigNotificationDoesNotResultInDeadlock() throws Exception {
NotificationCenter notificationCenter = new NotificationCenter();
Expand Down Expand Up @@ -257,7 +273,11 @@ private TestProjectConfigManager(ProjectConfig projectConfig) {
}

private TestProjectConfigManager(ProjectConfig projectConfig, long blockPeriod, NotificationCenter notificationCenter) {
super(POLLING_PERIOD, POLLING_UNIT, blockPeriod, POLLING_UNIT, notificationCenter);
this(projectConfig, POLLING_PERIOD, POLLING_UNIT, blockPeriod, POLLING_UNIT, notificationCenter);
}

private TestProjectConfigManager(ProjectConfig projectConfig, long pollingPeriod, TimeUnit pollingUnit, long blockPeriod, TimeUnit blockingUnit, NotificationCenter notificationCenter) {
super(pollingPeriod, pollingUnit, blockPeriod, blockingUnit, notificationCenter);
this.projectConfig = projectConfig;
}

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