Examples with ProcedureException org.neo4j.kernel.api.exceptions.ProcedureException used on opensource projects

Example 26 with ProcedureException

use of org.neo4j.kernel.api.exceptions.ProcedureException in project neo4j by neo4j.

the class MyCoreAPI method makeNode.

public long makeNode(String label) throws ProcedureException {
    long result;
    try (Transaction tx = graph.beginTransaction(KernelTransaction.Type.explicit, AnonymousContext.write())) {
        Statement statement = this.txBridge.get();
        long nodeId = statement.dataWriteOperations().nodeCreate();
        int labelId = statement.tokenWriteOperations().labelGetOrCreateForName(label);
        statement.dataWriteOperations().nodeAddLabel(nodeId, labelId);
        result = nodeId;
        tx.success();
    } catch (Exception e) {
        log.error("Failed to create node: " + e.getMessage());
        throw new ProcedureException(Status.Procedure.ProcedureCallFailed, "Failed to create node: " + e.getMessage(), e);
    }
    return result;
}

Example 27 with ProcedureException

use of org.neo4j.kernel.api.exceptions.ProcedureException in project neo4j by neo4j.

the class ClusterOverviewProcedure method apply.

@Override
public RawIterator<Object[], ProcedureException> apply(Context ctx, Object[] input) throws ProcedureException {
    List<ReadWriteEndPoint> endpoints = new ArrayList<>();
    CoreTopology coreTopology = topologyService.coreServers();
    Set<MemberId> coreMembers = coreTopology.members().keySet();
    MemberId leader = null;
    try {
        leader = leaderLocator.getLeader();
    } catch (NoLeaderFoundException e) {
        log.debug("No write server found. This can happen during a leader switch.");
    }
    for (MemberId memberId : coreMembers) {
        Optional<CoreServerInfo> coreServerInfo = coreTopology.find(memberId);
        if (coreServerInfo.isPresent()) {
            Role role = memberId.equals(leader) ? Role.LEADER : Role.FOLLOWER;
            endpoints.add(new ReadWriteEndPoint(coreServerInfo.get().connectors(), role, memberId.getUuid(), asList(coreServerInfo.get().groups())));
        } else {
            log.debug("No Address found for " + memberId);
        }
    }
    for (Map.Entry<MemberId, ReadReplicaInfo> readReplica : topologyService.readReplicas().members().entrySet()) {
        ReadReplicaInfo readReplicaInfo = readReplica.getValue();
        endpoints.add(new ReadWriteEndPoint(readReplicaInfo.connectors(), Role.READ_REPLICA, readReplica.getKey().getUuid(), asList(readReplicaInfo.groups())));
    }
    endpoints.sort(comparing(o -> o.addresses().toString()));
    return map((endpoint) -> new Object[] { endpoint.memberId().toString(), endpoint.addresses().uriList().stream().map(URI::toString).toArray(), endpoint.role().name(), endpoint.groups() }, asRawIterator(endpoints.iterator()));
}

Example 28 with ProcedureException

use of org.neo4j.kernel.api.exceptions.ProcedureException in project neo4j by neo4j.

the class ClusterOverviewIT method clusterOverview.

private List<MemberInfo> clusterOverview(GraphDatabaseFacade db) throws TransactionFailureException, ProcedureException {
    KernelAPI kernel = db.getDependencyResolver().resolveDependency(KernelAPI.class);
    KernelTransaction transaction = kernel.newTransaction(Type.implicit, AnonymousContext.read());
    List<MemberInfo> infos = new ArrayList<>();
    try (Statement statement = transaction.acquireStatement()) {
        RawIterator<Object[], ProcedureException> itr = statement.procedureCallOperations().procedureCallRead(procedureName("dbms", "cluster", ClusterOverviewProcedure.PROCEDURE_NAME), null);
        while (itr.hasNext()) {
            Object[] row = itr.next();
            Object[] addresses = (Object[]) row[1];
            infos.add(new MemberInfo(Arrays.copyOf(addresses, addresses.length, String[].class), Role.valueOf((String) row[2])));
        }
    }
    return infos;
}

Example 29 with ProcedureException

use of org.neo4j.kernel.api.exceptions.ProcedureException in project neo4j by neo4j.

the class BuiltInProcedures method listIndexes.

@Description("List all indexes in the database.")
@Procedure(name = "db.indexes", mode = READ)
public Stream<IndexResult> listIndexes() throws ProcedureException {
    try (Statement statement = tx.acquireStatement()) {
        ReadOperations operations = statement.readOperations();
        TokenNameLookup tokens = new StatementTokenNameLookup(operations);
        List<NewIndexDescriptor> indexes = asList(operations.indexesGetAll());
        Set<NewIndexDescriptor> uniqueIndexes = asSet(operations.uniqueIndexesGetAll());
        indexes.addAll(uniqueIndexes);
        indexes.sort(Comparator.comparing(a -> a.userDescription(tokens)));
        ArrayList<IndexResult> result = new ArrayList<>();
        for (NewIndexDescriptor index : indexes) {
            try {
                String type;
                if (uniqueIndexes.contains(index)) {
                    type = IndexType.NODE_UNIQUE_PROPERTY.typeName();
                } else {
                    type = IndexType.NODE_LABEL_PROPERTY.typeName();
                }
                result.add(new IndexResult("INDEX ON " + index.schema().userDescription(tokens), operations.indexGetState(index).toString(), type));
            } catch (IndexNotFoundKernelException e) {
                throw new ProcedureException(Status.Schema.IndexNotFound, e, "No index on ", index.userDescription(tokens));
            }
        }
        return result.stream();
    }
}

Example 30 with ProcedureException

use of org.neo4j.kernel.api.exceptions.ProcedureException in project neo4j by neo4j.

the class IndexProcedures method resampleIndex.

public void resampleIndex(String indexSpecification) throws ProcedureException {
    IndexSpecifier index = parse(indexSpecification);
    int labelId = getLabelId(index.label());
    int propertyKeyId = getPropertyKeyId(index.property());
    //TODO: Support composite indexes
    try {
        triggerSampling(getIndex(labelId, propertyKeyId, index));
    } catch (IndexNotFoundKernelException e) {
        throw new ProcedureException(e.status(), e.getMessage(), e);
    }
}