feat(client): adjust retry behavior (#106)

Author: stainless-bot

lithic-java-core/src/main/kotlin/com/lithic/api/core/http/RetryingHttpClient.kt

@@ -178,12 +178,12 @@ private constructor(
         }
 
         // Apply exponential backoff, but not more than the max.
-        val backoffSeconds = min(0.5 * 2.0.pow(retries - 1), 2.0)
+        val backoffSeconds = min(0.5 * 2.0.pow(retries - 1), 8.0)
 
         // Apply some jitter
-        val jitter = ThreadLocalRandom.current().nextDouble()
+        val jitter = 1.0 - 0.25 * ThreadLocalRandom.current().nextDouble()
 
-        return (TimeUnit.SECONDS.toMillis(1) * backoffSeconds + jitter).toLong()
+        return (TimeUnit.SECONDS.toMillis(1) * backoffSeconds * jitter).toLong()
     }
 
     private fun sleepAsync(millis: Long): CompletableFuture<Void> {

lithic-java-core/src/test/kotlin/com/lithic/api/core/http/RetryingHttpClientTest.kt

@@ -77,7 +77,8 @@ internal class RetryingHttpClientTest {
                 .willReturn(ok())
                 .willSetStateTo("COMPLETED")
         )
-        val retryingClient = RetryingHttpClient.builder().httpClient(httpClient).build()
+        val retryingClient =
+            RetryingHttpClient.builder().httpClient(httpClient).maxRetries(2).build()
         val response = retryingClient.execute(request)
         assertThat(response.statusCode()).isEqualTo(200)
         verify(3, postRequestedFor(urlPathEqualTo("/something")))