Examples with QueryVisitor com.bakdata.conquery.models.query.visitor.QueryVisitor used on opensource projects

Example 1 with QueryVisitor

use of com.bakdata.conquery.models.query.visitor.QueryVisitor in project conquery by bakdata.

the class QueryProcessor method postQuery.

/**
 * Creates a query for all datasets, then submits it for execution on the
 * intended dataset.
 */
public ManagedExecution<?> postQuery(Dataset dataset, QueryDescription query, Subject subject) {
    log.info("Query posted on Dataset[{}] by User[{{}].", dataset.getId(), subject.getId());
    // This maps works as long as we have query visitors that are not configured in anyway.
    // So adding a visitor twice would replace the previous one but both would have yielded the same result.
    // For the future a better data structure might be desired that also regards similar QueryVisitors of different configuration
    ClassToInstanceMap<QueryVisitor> visitors = MutableClassToInstanceMap.create();
    query.addVisitors(visitors);
    // Initialize checks that need to traverse the query tree
    visitors.putInstance(QueryUtils.OnlyReusingChecker.class, new QueryUtils.OnlyReusingChecker());
    visitors.putInstance(NamespacedIdentifiableCollector.class, new NamespacedIdentifiableCollector());
    final String primaryGroupName = AuthorizationHelper.getPrimaryGroup(subject, storage).map(Group::getName).orElse("none");
    visitors.putInstance(ExecutionMetrics.QueryMetricsReporter.class, new ExecutionMetrics.QueryMetricsReporter(primaryGroupName));
    // Chain all Consumers
    Consumer<Visitable> consumerChain = QueryUtils.getNoOpEntryPoint();
    for (QueryVisitor visitor : visitors.values()) {
        consumerChain = consumerChain.andThen(visitor);
    }
    // Apply consumers to the query tree
    query.visit(consumerChain);
    query.authorize(subject, dataset, visitors);
    // After all authorization checks we can now use the actual subject to invoke the query and do not to bubble down the Userish in methods
    ExecutionMetrics.reportNamespacedIds(visitors.getInstance(NamespacedIdentifiableCollector.class).getIdentifiables(), primaryGroupName);
    ExecutionMetrics.reportQueryClassUsage(query.getClass(), primaryGroupName);
    final Namespace namespace = datasetRegistry.get(dataset.getId());
    final ExecutionManager executionManager = namespace.getExecutionManager();
    // If this is only a re-executing query, try to execute the underlying query instead.
    {
        final Optional<ManagedExecutionId> executionId = visitors.getInstance(QueryUtils.OnlyReusingChecker.class).getOnlyReused();
        final Optional<ManagedExecution<?>> execution = executionId.map(id -> tryReuse(query, id, datasetRegistry, config, executionManager, subject.getUser()));
        if (execution.isPresent()) {
            return execution.get();
        }
    }
    // Execute the query
    return executionManager.runQuery(datasetRegistry, query, subject.getUser(), dataset, config);
}