Examples with Result org.neo4j.graphdb.Result used on opensource projects

Example 26 with Result

use of org.neo4j.graphdb.Result in project neo4j by neo4j.

the class CausalClusteringProceduresIT method readReplicaProceduresShouldBeAvailable.

@Test
public void readReplicaProceduresShouldBeAvailable() throws Exception {
    // given
    String[] readReplicaProcs = new String[] { // Server role
    "dbms.cluster.role", // Kernel built procedures
    "dbms.procedures", // Built in procedure from enterprise
    "dbms.listQueries" };
    // when
    for (String procedure : readReplicaProcs) {
        Optional<ReadReplica> firstReadReplica = cluster.readReplicas().stream().findFirst();
        assert firstReadReplica.isPresent();
        ReadReplicaGraphDatabase database = firstReadReplica.get().database();
        InternalTransaction tx = database.beginTransaction(KernelTransaction.Type.explicit, AUTH_DISABLED);
        Result readReplicaResult = database.execute("CALL " + procedure + "()");
        // then
        assertTrue("read replica with procedure " + procedure, readReplicaResult.hasNext());
        readReplicaResult.close();
        tx.close();
    }
}

Example 27 with Result

use of org.neo4j.graphdb.Result in project neo4j by neo4j.

the class CausalClusteringProceduresIT method coreProceduresShouldBeAvailable.

@Test
public void coreProceduresShouldBeAvailable() throws Throwable {
    String[] coreProcs = new String[] { // Server role
    "dbms.cluster.role", // Discover the cluster topology
    "dbms.cluster.routing.getServers", // Discover appropriate discovery service
    "dbms.cluster.overview", // Kernel built procedures
    "dbms.procedures", // Built in procedure from enterprise
    "dbms.listQueries" };
    for (String procedure : coreProcs) {
        Optional<CoreClusterMember> firstCore = cluster.coreMembers().stream().findFirst();
        assert firstCore.isPresent();
        CoreGraphDatabase database = firstCore.get().database();
        InternalTransaction tx = database.beginTransaction(KernelTransaction.Type.explicit, AUTH_DISABLED);
        Result coreResult = database.execute("CALL " + procedure + "()");
        assertTrue("core with procedure " + procedure, coreResult.hasNext());
        coreResult.close();
        tx.close();
    }
}

Example 28 with Result

use of org.neo4j.graphdb.Result in project neo4j by neo4j.

the class CypherService method cypher.

@POST
@SuppressWarnings({ "unchecked", "ParameterCanBeLocal" })
public Response cypher(String body, @Context HttpServletRequest request, @QueryParam(INCLUDE_STATS_PARAM) boolean includeStats, @QueryParam(INCLUDE_PLAN_PARAM) boolean includePlan, @QueryParam(PROFILE_PARAM) boolean profile) throws BadInputException {
    usage.get(features).flag(http_cypher_endpoint);
    Map<String, Object> command = input.readMap(body);
    if (!command.containsKey(QUERY_KEY)) {
        return output.badRequest(new InvalidArgumentsException("You have to provide the 'query' parameter."));
    }
    String query = (String) command.get(QUERY_KEY);
    Map<String, Object> params;
    try {
        params = (Map<String, Object>) (command.containsKey(PARAMS_KEY) && command.get(PARAMS_KEY) != null ? command.get(PARAMS_KEY) : new HashMap<String, Object>());
    } catch (ClassCastException e) {
        return output.badRequest(new IllegalArgumentException("Parameters must be a JSON map"));
    }
    try {
        QueryExecutionEngine executionEngine = cypherExecutor.getExecutionEngine();
        boolean periodicCommitQuery = executionEngine.isPeriodicCommit(query);
        CommitOnSuccessfulStatusCodeRepresentationWriteHandler handler = (CommitOnSuccessfulStatusCodeRepresentationWriteHandler) output.getRepresentationWriteHandler();
        if (periodicCommitQuery) {
            handler.closeTransaction();
        }
        TransactionalContext tc = cypherExecutor.createTransactionContext(query, params, request);
        Result result;
        if (profile) {
            result = executionEngine.profileQuery(query, params, tc);
            includePlan = true;
        } else {
            result = executionEngine.executeQuery(query, params, tc);
            includePlan = result.getQueryExecutionType().requestedExecutionPlanDescription();
        }
        if (periodicCommitQuery) {
            handler.setTransaction(database.beginTx());
        }
        return output.ok(new CypherResultRepresentation(result, includeStats, includePlan));
    } catch (Throwable e) {
        if (e.getCause() instanceof CypherException) {
            return output.badRequest(e.getCause());
        } else {
            return output.badRequest(e);
        }
    }
}

Example 29 with Result

use of org.neo4j.graphdb.Result in project neo4j by neo4j.

the class TransactionHandle method executeStatements.

private void executeStatements(StatementDeserializer statements, ExecutionResultSerializer output, List<Neo4jError> errors, HttpServletRequest request) {
    try {
        boolean hasPrevious = false;
        while (statements.hasNext()) {
            Statement statement = statements.next();
            try {
                boolean hasPeriodicCommit = engine.isPeriodicCommit(statement.statement());
                if ((statements.hasNext() || hasPrevious) && hasPeriodicCommit) {
                    throw new QueryExecutionKernelException(new InvalidSemanticsException("Cannot execute another statement after executing " + "PERIODIC COMMIT statement in the same transaction"));
                }
                if (!hasPrevious && hasPeriodicCommit) {
                    context.closeTransactionForPeriodicCommit();
                }
                hasPrevious = true;
                TransactionalContext tc = txManagerFacade.create(request, queryService, type, securityContext, statement.statement(), statement.parameters());
                Result result = safelyExecute(statement, hasPeriodicCommit, tc);
                output.statementResult(result, statement.includeStats(), statement.resultDataContents());
                output.notifications(result.getNotifications());
            } catch (KernelException | CypherException | AuthorizationViolationException | WriteOperationsNotAllowedException e) {
                errors.add(new Neo4jError(e.status(), e));
                break;
            } catch (DeadlockDetectedException e) {
                errors.add(new Neo4jError(Status.Transaction.DeadlockDetected, e));
            } catch (IOException e) {
                errors.add(new Neo4jError(Status.Network.CommunicationError, e));
                break;
            } catch (Exception e) {
                Throwable cause = e.getCause();
                if (cause instanceof Status.HasStatus) {
                    errors.add(new Neo4jError(((Status.HasStatus) cause).status(), cause));
                } else {
                    errors.add(new Neo4jError(Status.Statement.ExecutionFailed, e));
                }
                break;
            }
        }
        addToCollection(statements.errors(), errors);
    } catch (Throwable e) {
        errors.add(new Neo4jError(Status.General.UnknownError, e));
    }
}

Example 30 with Result

use of org.neo4j.graphdb.Result in project neo4j by neo4j.

the class EmbeddedBuiltInProceduresInteractionTest method shouldNotListAnyQueriesIfNotAuthenticated.

@Test
public void shouldNotListAnyQueriesIfNotAuthenticated() {
    GraphDatabaseFacade graph = neo.getLocalGraph();
    try (InternalTransaction tx = graph.beginTransaction(KernelTransaction.Type.explicit, AnonymousContext.none())) {
        Result result = graph.execute(tx, "CALL dbms.listQueries", Collections.emptyMap());
        assertFalse(result.hasNext());
        tx.success();
    }
}