Examples with ApplyPreviewColumnsRequest io.deephaven.javascript.proto.dhinternal.io.deephaven.proto.table_pb.ApplyPreviewColumnsRequest used on opensource projects

Example 1 with ApplyPreviewColumnsRequest

use of io.deephaven.javascript.proto.dhinternal.io.deephaven.proto.table_pb.ApplyPreviewColumnsRequest in project deephaven-core by deephaven.

the class WorkerConnection method getTable.

public Promise<JsTable> getTable(JsVariableDefinition varDef, @Nullable Boolean applyPreviewColumns) {
    return whenServerReady("get a table").then(serve -> {
        JsLog.debug("innerGetTable", varDef.getTitle(), " started");
        return newState(info, (c, cts, metadata) -> {
            JsLog.debug("performing fetch for ", varDef.getTitle(), " / ", cts, " (" + LazyString.of(cts::getHandle), ")");
            // TODO (deephaven-core#188): eliminate this branch by applying preview cols before subscribing
            if (applyPreviewColumns == null || applyPreviewColumns) {
                ApplyPreviewColumnsRequest req = new ApplyPreviewColumnsRequest();
                req.setSourceId(TableTicket.createTableRef(varDef));
                req.setResultId(cts.getHandle().makeTicket());
                tableServiceClient.applyPreviewColumns(req, metadata, c::apply);
            } else {
                FetchTableRequest req = new FetchTableRequest();
                req.setSourceId(TableTicket.createTableRef(varDef));
                req.setResultId(cts.getHandle().makeTicket());
                tableServiceClient.fetchTable(req, metadata, c::apply);
            }
        }, "fetch table " + varDef.getTitle()).then(cts -> {
            JsLog.debug("innerGetTable", varDef.getTitle(), " succeeded ", cts);
            JsTable table = new JsTable(this, cts);
            return Promise.resolve(table);
        });
    });
}