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io.split.engine.common.SyncManagerImp Maven / Gradle / Ivy
package io.split.engine.common;
import com.google.common.annotations.VisibleForTesting;
import io.split.client.ApiKeyCounter;
import io.split.client.SplitClientConfig;
import io.split.client.interceptors.FlagSetsFilter;
import io.split.engine.SDKReadinessGates;
import io.split.engine.experiments.SplitFetcher;
import io.split.engine.experiments.SplitParser;
import io.split.engine.experiments.SplitSynchronizationTask;
import io.split.engine.segments.SegmentSynchronizationTask;
import io.split.storages.SegmentCacheProducer;
import io.split.storages.SplitCacheProducer;
import io.split.telemetry.domain.StreamingEvent;
import io.split.telemetry.domain.enums.StreamEventsEnum;
import io.split.telemetry.storage.TelemetryRuntimeProducer;
import io.split.telemetry.synchronizer.TelemetrySynchronizer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.ArrayList;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.atomic.AtomicBoolean;
import static com.google.common.base.Preconditions.checkNotNull;
import static io.split.client.utils.SplitExecutorFactory.buildExecutorService;
public class SyncManagerImp implements SyncManager {
private static final Logger _log = LoggerFactory.getLogger(SyncManagerImp.class);
private final AtomicBoolean _streamingEnabledConfig;
private final Synchronizer _synchronizer;
private final PushManager _pushManager;
private final AtomicBoolean _shuttedDown;
private final LinkedBlockingQueue _incomingPushStatus;
private final ExecutorService _pushMonitorExecutorService;
private final ExecutorService _initializationtExecutorService;
private final SDKReadinessGates _gates;
private Future _pushStatusMonitorTask;
private Backoff _backoff;
private final TelemetryRuntimeProducer _telemetryRuntimeProducer;
private final TelemetrySynchronizer _telemetrySynchronizer;
private final SplitClientConfig _config;
private final long _startingSyncCallBackoffBaseMs;
private final SegmentSynchronizationTask _segmentSynchronizationTaskImp;
private final SplitSynchronizationTask _splitSynchronizationTask;
private static final long STARTING_SYNC_ALL_BACKOFF_MAX_WAIT_MS = 10000; // 10 seconds max wait
private final SplitAPI _splitAPI;
@VisibleForTesting
/* package private */ SyncManagerImp(SplitTasks splitTasks,
boolean streamingEnabledConfig,
Synchronizer synchronizer,
PushManager pushManager,
LinkedBlockingQueue pushMessages,
SDKReadinessGates gates,
TelemetryRuntimeProducer telemetryRuntimeProducer,
TelemetrySynchronizer telemetrySynchronizer,
SplitClientConfig config,
SplitAPI splitAPI) {
_streamingEnabledConfig = new AtomicBoolean(streamingEnabledConfig);
_synchronizer = checkNotNull(synchronizer);
_pushManager = checkNotNull(pushManager);
_shuttedDown = new AtomicBoolean(false);
_incomingPushStatus = pushMessages;
_pushMonitorExecutorService = buildExecutorService(config.getThreadFactory(), "SPLIT-PushStatusMonitor-%d");
_initializationtExecutorService = buildExecutorService(config.getThreadFactory(), "SPLIT-Initialization-%d");
_backoff = new Backoff(config.authRetryBackoffBase());
_gates = checkNotNull(gates);
_telemetryRuntimeProducer = checkNotNull(telemetryRuntimeProducer);
_telemetrySynchronizer = checkNotNull(telemetrySynchronizer);
_config = checkNotNull(config);
_startingSyncCallBackoffBaseMs = config.startingSyncCallBackoffBaseMs();
_segmentSynchronizationTaskImp = checkNotNull(splitTasks.getSegmentSynchronizationTask());
_splitSynchronizationTask = checkNotNull(splitTasks.getSplitSynchronizationTask());
_splitAPI = splitAPI;
}
public static SyncManagerImp build(SplitTasks splitTasks,
SplitFetcher splitFetcher,
SplitCacheProducer splitCacheProducer,
SplitAPI splitAPI,
SegmentCacheProducer segmentCacheProducer,
SDKReadinessGates gates,
TelemetryRuntimeProducer telemetryRuntimeProducer,
TelemetrySynchronizer telemetrySynchronizer,
SplitClientConfig config,
SplitParser splitParser,
FlagSetsFilter flagSetsFilter) {
LinkedBlockingQueue pushMessages = new LinkedBlockingQueue<>();
Synchronizer synchronizer = new SynchronizerImp(splitTasks,
splitFetcher,
splitCacheProducer,
segmentCacheProducer,
config.streamingRetryDelay(),
config.streamingFetchMaxRetries(),
config.failedAttemptsBeforeLogging(),
config.getSetsFilter());
PushManager pushManager = PushManagerImp.build(synchronizer,
config.streamingServiceURL(),
config.authServiceURL(),
splitAPI,
pushMessages,
telemetryRuntimeProducer,
config.getThreadFactory(),
splitParser,
splitCacheProducer,
flagSetsFilter);
return new SyncManagerImp(splitTasks,
config.streamingEnabled(),
synchronizer,
pushManager,
pushMessages,
gates,
telemetryRuntimeProducer,
telemetrySynchronizer,
config,
splitAPI);
}
@Override
public void start() {
_initializationtExecutorService.submit(() -> {
Backoff startBackoff = new Backoff(_startingSyncCallBackoffBaseMs, STARTING_SYNC_ALL_BACKOFF_MAX_WAIT_MS);
while(!_synchronizer.syncAll()) {
try{
long howLong = startBackoff.interval();
Thread.currentThread().sleep(howLong);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
break;
}
}
if (_shuttedDown.get()) {
return;
}
if (_log.isDebugEnabled()) {
_log.debug("SyncAll Ready");
}
_gates.sdkInternalReady();
if (_streamingEnabledConfig.get()) {
startStreamingMode();
} else {
startPollingMode();
}
_synchronizer.startPeriodicDataRecording();
_telemetrySynchronizer.synchronizeConfig(_config, System.currentTimeMillis(), ApiKeyCounter.getApiKeyCounterInstance().
getFactoryInstances(), new ArrayList<>());
});
}
@Override
public void shutdown() throws IOException {
_log.info("Shutting down SyncManagerImp");
if(_shuttedDown.get()) {
return;
}
_shuttedDown.set(true);
_initializationtExecutorService.shutdownNow();
_synchronizer.stopPeriodicFetching();
if (_streamingEnabledConfig.get()) {
_pushManager.stop();
_pushMonitorExecutorService.shutdownNow();
}
_segmentSynchronizationTaskImp.close();
_log.info("Successful shutdown of segment fetchers");
_splitSynchronizationTask.close();
_log.info("Successful shutdown of splits");
_synchronizer.stopPeriodicDataRecording();
_splitAPI.close();
}
private void startStreamingMode() {
_log.debug("Starting in streaming mode ...");
if (null == _pushStatusMonitorTask) {
_pushStatusMonitorTask = _pushMonitorExecutorService.submit(this::incomingPushStatusHandler);
}
_pushManager.start();
_telemetryRuntimeProducer.recordStreamingEvents(new StreamingEvent(StreamEventsEnum.SYNC_MODE_UPDATE.getType(),
StreamEventsEnum.SyncModeUpdateValues.STREAMING_EVENT.getValue(), System.currentTimeMillis()));
}
private void startPollingMode() {
_log.debug("Starting in polling mode ...");
_synchronizer.startPeriodicFetching();
_telemetryRuntimeProducer.recordStreamingEvents(new StreamingEvent(StreamEventsEnum.SYNC_MODE_UPDATE.getType(),
StreamEventsEnum.SyncModeUpdateValues.POLLING_EVENT.getValue(), System.currentTimeMillis()));
}
@VisibleForTesting
/* package private */ void incomingPushStatusHandler() {
while (!Thread.interrupted()) {
try {
PushManager.Status status = _incomingPushStatus.take();
_log.debug(String.format("Streaming status received: %s", status.toString()));
switch (status) {
case STREAMING_READY:
_synchronizer.stopPeriodicFetching();
_synchronizer.syncAll();
_pushManager.startWorkers();
_pushManager.scheduleConnectionReset();
_backoff.reset();
_telemetryRuntimeProducer.recordStreamingEvents(new StreamingEvent(StreamEventsEnum.STREAMING_STATUS.getType(),
StreamEventsEnum.StreamingStatusValues.STREAMING_ENABLED.getValue(), System.currentTimeMillis()));
_log.info("Streaming up and running.");
break;
case STREAMING_DOWN:
_log.info("Streaming service temporarily unavailable, working in polling mode.");
_pushManager.stopWorkers();
_synchronizer.startPeriodicFetching();
break;
case STREAMING_BACKOFF:
long howLong = _backoff.interval();
_log.info(String.format("Retryable error in streaming subsystem. Switching to polling and retrying in %d seconds", howLong));
_synchronizer.startPeriodicFetching();
_pushManager.stop();
Thread.sleep(howLong * 1000);
_incomingPushStatus.clear();
_pushManager.start();
break;
case STREAMING_OFF:
_log.info("Unrecoverable error in streaming subsystem. SDK will work in polling-mode and will not retry an SSE connection.");
_pushManager.stop();
_synchronizer.startPeriodicFetching();
if (null != _pushStatusMonitorTask) {
_pushStatusMonitorTask.cancel(false);
}
return; // Stop this task for the rest of the SDK lifetime
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
break;
}
}
}
}
