Examples with Preconditions com.google.common.base.Preconditions used on opensource projects

Example 6 with Preconditions

use of com.google.common.base.Preconditions in project pravega by pravega.

the class WriteOperation method call.

@Override
public CompletableFuture<Void> call() {
    // Validate preconditions.
    checkPreconditions();
    log.debug("{} write - started op={}, segment={}, offset={} length={}.", chunkedSegmentStorage.getLogPrefix(), System.identityHashCode(this), handle.getSegmentName(), offset, length);
    val streamSegmentName = handle.getSegmentName();
    return ChunkedSegmentStorage.tryWith(chunkedSegmentStorage.getMetadataStore().beginTransaction(false, handle.getSegmentName()), txn -> {
        didSegmentLayoutChange = false;
        // Retrieve metadata.
        return txn.get(streamSegmentName).thenComposeAsync(storageMetadata -> {
            segmentMetadata = (SegmentMetadata) storageMetadata;
            // Validate preconditions.
            checkState();
            isSystemSegment = chunkedSegmentStorage.isStorageSystemSegment(segmentMetadata);
            // Check if this is a first write after ownership changed.
            isFirstWriteAfterFailover = segmentMetadata.isOwnershipChanged();
            lastChunkMetadata.set(null);
            chunkHandle = null;
            bytesRemaining.set(length);
            currentOffset.set(offset);
            return getLastChunk(txn).thenComposeAsync(v -> writeData(txn).thenComposeAsync(vv -> commit(txn).thenApplyAsync(vvvv -> postCommit(), chunkedSegmentStorage.getExecutor()).exceptionally(this::handleException), chunkedSegmentStorage.getExecutor()).thenRunAsync(this::logEnd, chunkedSegmentStorage.getExecutor()), chunkedSegmentStorage.getExecutor());
        }, chunkedSegmentStorage.getExecutor());
    }, chunkedSegmentStorage.getExecutor()).exceptionally(ex -> (Void) handleException(ex));
}

Example 7 with Preconditions

use of com.google.common.base.Preconditions in project pravega by pravega.

the class PersistentStreamBase method submitScale.

/**
 * This method attempts to start a new scale workflow. For this it first computes epoch transition and stores it
 * in the metadastore.
 * This method can be called by manual scale or during the processing of auto-scale event. Which means there could be
 * concurrent calls to this method.
 *
 * @param segmentsToSeal segments that will be sealed at the end of this scale operation.
 * @param newRanges      key ranges of new segments to be created
 * @param scaleTimestamp scaling timestamp
 * @return : list of newly created segments with current epoch
 */
@Override
public CompletableFuture<VersionedMetadata<EpochTransitionRecord>> submitScale(final List<Long> segmentsToSeal, final List<Map.Entry<Double, Double>> newRanges, final long scaleTimestamp, final VersionedMetadata<EpochTransitionRecord> existing, OperationContext context) {
    Preconditions.checkNotNull(context, "Operation context cannot be null");
    return verifyNotSealed(context).thenCompose(v -> {
        if (existing == null) {
            return getEpochTransition(context);
        } else {
            return CompletableFuture.completedFuture(existing);
        }
    }).thenCompose(record -> getActiveEpochRecord(true, context).thenCompose(currentEpoch -> getConfiguration(context).thenCompose(config -> {
        if (!record.getObject().equals(EpochTransitionRecord.EMPTY)) {
            // and new ranges are identical). else throw scale conflict exception
            if (!RecordHelper.verifyRecordMatchesInput(segmentsToSeal, newRanges, false, record.getObject())) {
                log.debug(context.getRequestId(), "scale conflict, another scale operation is ongoing");
                throw new EpochTransitionOperationExceptions.ConflictException();
            }
            return CompletableFuture.completedFuture(record);
        } else {
            // check input is valid and satisfies preconditions
            if (!RecordHelper.canScaleFor(segmentsToSeal, currentEpoch)) {
                return updateEpochTransitionNode(new VersionedMetadata<>(EpochTransitionRecord.EMPTY, record.getVersion()), context).thenApply(x -> {
                    log.warn(context.getRequestId(), "scale precondition failed {}", segmentsToSeal);
                    throw new EpochTransitionOperationExceptions.PreConditionFailureException();
                });
            }
            if (!RecordHelper.validateInputRange(segmentsToSeal, newRanges, currentEpoch)) {
                log.error(context.getRequestId(), "scale input invalid {} {}", segmentsToSeal, newRanges);
                throw new EpochTransitionOperationExceptions.InputInvalidException();
            }
            int numberOfSegmentsPostScale = currentEpoch.getSegments().size() - segmentsToSeal.size() + newRanges.size();
            if (numberOfSegmentsPostScale < config.getScalingPolicy().getMinNumSegments()) {
                log.warn(context.getRequestId(), "Scale cannot be performed as Min Segment Count will not hold {} {}", segmentsToSeal, newRanges);
                throw new EpochTransitionOperationExceptions.PreConditionFailureException();
            }
            EpochTransitionRecord epochTransition = RecordHelper.computeEpochTransition(currentEpoch, segmentsToSeal, newRanges, scaleTimestamp);
            return updateEpochTransitionNode(new VersionedMetadata<>(epochTransition, record.getVersion()), context).thenApply(version -> {
                log.info(context.getRequestId(), "scale for stream {}/{} accepted. Segments to seal = {}", scope, name, epochTransition.getSegmentsToSeal());
                return new VersionedMetadata<>(epochTransition, version);
            });
        }
    })));
}

Example 8 with Preconditions

use of com.google.common.base.Preconditions in project android_packages_apps_Dialer by LineageOS.

the class RefreshAnnotatedCallLogWorker method isDirty.

private ListenableFuture<Boolean> isDirty() {
    List<ListenableFuture<Boolean>> isDirtyFutures = new ArrayList<>();
    for (CallLogDataSource dataSource : dataSources.getDataSourcesIncludingSystemCallLog()) {
        ListenableFuture<Boolean> dataSourceDirty = dataSource.isDirty();
        isDirtyFutures.add(dataSourceDirty);
        String eventName = String.format(Metrics.IS_DIRTY_TEMPLATE, dataSource.getLoggingName());
        futureTimer.applyTiming(dataSourceDirty, eventName, LogCatMode.LOG_VALUES);
    }
    // Simultaneously invokes isDirty on all data sources, returning as soon as one returns true.
    ListenableFuture<Boolean> isDirtyFuture = DialerFutures.firstMatching(isDirtyFutures, Preconditions::checkNotNull, false);
    futureTimer.applyTiming(isDirtyFuture, Metrics.IS_DIRTY_EVENT_NAME, LogCatMode.LOG_VALUES);
    return isDirtyFuture;
}

Example 9 with Preconditions

use of com.google.common.base.Preconditions in project android_packages_apps_Dialer by MoKee.

the class RefreshAnnotatedCallLogWorker method isDirty.

private ListenableFuture<Boolean> isDirty() {
    List<ListenableFuture<Boolean>> isDirtyFutures = new ArrayList<>();
    for (CallLogDataSource dataSource : dataSources.getDataSourcesIncludingSystemCallLog()) {
        ListenableFuture<Boolean> dataSourceDirty = dataSource.isDirty(appContext);
        isDirtyFutures.add(dataSourceDirty);
        String eventName = String.format(Metrics.IS_DIRTY_TEMPLATE, dataSource.getClass().getSimpleName());
        futureTimer.applyTiming(dataSourceDirty, eventName, LogCatMode.LOG_VALUES);
    }
    // Simultaneously invokes isDirty on all data sources, returning as soon as one returns true.
    ListenableFuture<Boolean> isDirtyFuture = DialerFutures.firstMatching(isDirtyFutures, Preconditions::checkNotNull, false);
    futureTimer.applyTiming(isDirtyFuture, Metrics.IS_DIRTY_EVENT_NAME, LogCatMode.LOG_VALUES);
    return isDirtyFuture;
}