References: []Reference{
						{PrimaryKey: "ID", PrimarySchema: "Country", ForeignKey: "CountryID", ForeignSchema: "Org"},
					},
				},
			},
		},
		"NestedAddress": {
			Relations: map[string]Relation{
				"Country": {
					Name: "Country", Type: schema.BelongsTo, Schema: "Org", FieldSchema: "Country",
					References: []Reference{

        // Verify
        assertTrue(result.isPresent());
        assertEquals(Locale.JAPAN, result.get());
    }

    // Test findBusinessLocale with language only (no country)
    public void test_findBusinessLocale_withLanguageOnly() {
        // Setup mock config
        FessConfig mockConfig = new FessConfig.SimpleImpl() {
            @Override

Let's say that you want to use a different <abbr title="Content Delivery Network">CDN</abbr>, for example you want to use `https://unpkg.com/`.

This could be useful if for example you live in a country that restricts some URLs.

### Disable the automatic docs { #disable-the-automatic-docs }

The first step is to disable the automatic docs, as by default, those use the default CDN.

            <!-- Set max heap for tests. -->
            <!-- Catch dependencies on the default locale by setting it to hi-IN. -->
            <argLine>-Xmx1536M -Duser.language=hi -Duser.country=IN ${test.add.opens}</argLine>
          </configuration>
        </plugin>
        <plugin>
          <artifactId>maven-toolchains-plugin</artifactId>
          <version>3.2.0</version>
          <executions>

            <!-- Set max heap for tests. -->
            <!-- Catch dependencies on the default locale by setting it to hi-IN. -->
            <argLine>-Xmx1536M -Duser.language=hi -Duser.country=IN ${test.add.opens}</argLine>
          </configuration>
        </plugin>
        <plugin>
          <artifactId>maven-toolchains-plugin</artifactId>
          <version>3.2.0</version>
          <executions>

        AtomicInteger counter1 = new AtomicInteger(0);
        AtomicInteger counter2 = new AtomicInteger(0);

        executor1.addShutdownListener(() -> counter1.incrementAndGet());
        executor2.addShutdownListener(() -> counter2.incrementAndGet());

        executor1.shutdown();
        assertEquals(1, counter1.get());
        assertEquals(0, counter2.get());

        executor2.shutdown();

        // For GCM, last 4 bytes should contain incrementing counter
        ByteBuffer buffer1 = ByteBuffer.wrap(nonce1, 12, 4).order(java.nio.ByteOrder.LITTLE_ENDIAN);
        ByteBuffer buffer2 = ByteBuffer.wrap(nonce2, 12, 4).order(java.nio.ByteOrder.LITTLE_ENDIAN);
        int counter1 = buffer1.getInt();
        int counter2 = buffer2.getInt();

        assertEquals(counter1 + 1, counter2, "Counter should increment between nonces");
    }

    public void test_concurrent_stores() {
        // Test thread-safe implementation
        final AtomicLong counter = new AtomicLong(0);

        IndexUpdateCallback callback = new IndexUpdateCallback() {
            @Override
            public void store(DataStoreParams paramMap, Map<String, Object> dataMap) {
                counter.incrementAndGet();
            }

            @Override
            public long getDocumentSize() {

        long currentWindow = System.currentTimeMillis() / rateLimitWindow;
        String windowKey = key + "_" + currentWindow;

        AtomicLong counter = rateLimitCounters.computeIfAbsent(windowKey, k -> new AtomicLong(0));
        long currentCount = counter.incrementAndGet();

        // Clean up old windows periodically
        if (currentCount == 1) {
            cleanupOldRateLimitCounters(currentWindow);
        }

While waiting and talking to your crush, from time to time, you check the number displayed on the counter to see if it's your turn already.

Then at some point, it finally is your turn. You go to the counter, get your burgers and come back to the table.

<img src="/img/async/concurrent-burgers/concurrent-burgers-06.png" class="illustration">