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Remove initialization state from the SNTP service #51

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merged 1 commit into from
Nov 23, 2020
Merged

Remove initialization state from the SNTP service #51

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5 changes: 2 additions & 3 deletions kronos-java/src/main/java/com/lyft/kronos/internal/ntp/SntpService.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -69,14 +69,14 @@ internal class SntpServiceImpl @JvmOverloads constructor(private val sntpClient:
private val cacheExpirationMs: Long = CACHE_EXPIRATION_MS,
private val maxNtpResponseTimeMs: Long = MAX_NTP_RESPONSE_TIME_MS) : SntpService {

private val state = AtomicReference(State.INIT)
private val state = AtomicReference(State.IDLE)
private val cachedSyncTime = AtomicLong(0)
private val executor = Executors.newSingleThreadExecutor { Thread(it, "kronos-android") }

private val response: SntpClient.Response?
get() {
val response = responseCache.get()
val isCachedFromPreviousBoot = state.compareAndSet(State.INIT, State.IDLE) && response != null && !response.isFromSameBoot
val isCachedFromPreviousBoot = state.get() == State.IDLE && response != null && !response.isFromSameBoot
return if (isCachedFromPreviousBoot) {
responseCache.clear()
null
Expand All @@ -89,7 +89,6 @@ internal class SntpServiceImpl @JvmOverloads constructor(private val sntpClient:
get() = deviceClock.getElapsedTimeMs() - cachedSyncTime.get()

private enum class State {
INIT,
IDLE,
SYNCING,
STOPPED
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15 changes: 15 additions & 0 deletions kronos-java/src/test/java/com/lyft/kronos/internal/ntp/SntpServiceTest.kt
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Expand Up @@ -94,4 +94,19 @@ class SntpServiceTest {
verify(sntpSyncListener, times(1)).onError(eq("1.fake.pool.ntp.org"), any<NTPSyncException>())
verify(sntpSyncListener, times(1)).onError(eq("2.fake.pool.ntp.org"), any<NTPSyncException>())
}

@Test
fun shouldClearCacheWhenSyncFailsAndGettingCurrentTime() {
whenever(sntpClient.requestTime("1.fake.pool.ntp.org", TIMEOUT_MS)).thenReturn(mockResponse)
whenever(sntpClient.requestTime("2.fake.pool.ntp.org", TIMEOUT_MS)).thenReturn(mockResponse)
whenever(mockResponse.currentTimeMs).thenReturn(-1)
whenever(mockResponse.isFromSameBoot).thenReturn(false)
whenever(responseCache.get()).thenReturn(mockResponse)

assertThat(sntpService.sync()).isFalse

sntpService.currentTime()

verify(responseCache, times(1)).clear()
}
}