currentTimePeriod = event.getTimestamp();
        for (OperationState state: operationsInProgress.values()) {
            state.maybeFlushOutput(event.getTimestamp());
        }
    }

    private void onUngroupedOutput(RenderableOutputEvent event) {
        if (lastRenderedBuildOpId != null) {
            listener.onOutput(spacerLine(event.getTimestamp(), event.getCategory()));

                    }

                    // overwrite
                    if ( s.getTimestamp() == null ? snapshot.getTimestamp() != null
                        : !s.getTimestamp().equals( snapshot.getTimestamp() ) )
                    {
                        s.setTimestamp( snapshot.getTimestamp() );
                        changed = true;
                        updateSnapshotVersions = true;

    @Override
    public void write(Encoder encoder, BooleanQuestionPromptEvent value) throws Exception {
        encoder.writeLong(value.getTimestamp());
        encoder.writeString(value.getQuestion());
        encoder.writeBoolean(value.getDefaultValue());
    }

    @Override
    public BooleanQuestionPromptEvent read(Decoder decoder) throws Exception {

public class IntQuestionPromptEventSerializer implements Serializer<IntQuestionPromptEvent> {
    @Override
    public void write(Encoder encoder, IntQuestionPromptEvent value) throws Exception {
        encoder.writeLong(value.getTimestamp());
        encoder.writeString(value.getQuestion());
        encoder.writeSmallInt(value.getMinValue());
        encoder.writeSmallInt(value.getDefaultValue());
    }

    @Override

public class TextQuestionPromptEventSerializer implements Serializer<TextQuestionPromptEvent> {
    @Override
    public void write(Encoder encoder, TextQuestionPromptEvent value) throws Exception {
        encoder.writeLong(value.getTimestamp());
        encoder.writeString(value.getQuestion());
        encoder.writeString(value.getDefaultValue());
    }

    @Override
    public TextQuestionPromptEvent read(Decoder decoder) throws Exception {

public class YesNoQuestionPromptEventSerializer implements Serializer<YesNoQuestionPromptEvent> {
    @Override
    public void write(Encoder encoder, YesNoQuestionPromptEvent value) throws Exception {
        encoder.writeLong(value.getTimestamp());
        encoder.writeString(value.getQuestion());
    }

    @Override
    public YesNoQuestionPromptEvent read(Decoder decoder) throws Exception {

                    // The very first event starts the Initializing phase
                    // TODO - should use BuildRequestMetaData to determine the build start time
                    buildStartTimestamp = startEvent.getTimestamp();
                    buildProgressOperationId = startEvent.getProgressOperationId();
                    phaseStarted(startEvent, Phase.Initializing);

    @Override
    public void write(Encoder encoder, SelectOptionPromptEvent value) throws Exception {
        encoder.writeLong(value.getTimestamp());
        encoder.writeString(value.getQuestion());
        optionsSerializer.write(encoder, value.getOptions());
        encoder.writeSmallInt(value.getDefaultOption());
    }

    @Override

        operation.completeTime = progressCompleteEvent.getTimestamp();
        operation.complete();
    }

    private void onStart(ProgressStartEvent progressStartEvent) {
        Operation operation = new Operation(progressStartEvent.getCategory(), progressStartEvent.getLoggingHeader(), progressStartEvent.getTimestamp(), progressStartEvent.getBuildOperationId());

        return hashCode;
    }

    @Override
    public String getDisplayName() {
        return String.format("%s:%s:%s:%s", getGroup(), getModule(), getSnapshotVersion(), timestamp);
    }

    public String getTimestamp() {
        return timestamp;
    }

    public String getSnapshotVersion() {
        return getVersion().replace(timestamp, "SNAPSHOT");
    }

    public ModuleComponentIdentifier getSnapshotComponent() {