Examples with SystemProcedure org.neo4j.kernel.api.procedure.SystemProcedure used on opensource projects

Example 6 with SystemProcedure

use of org.neo4j.kernel.api.procedure.SystemProcedure in project neo4j by neo4j.

the class BuiltInProcedures method schemaStatements.

@Deprecated(since = "4.2.0", forRemoval = true)
@SystemProcedure
@Description("List all statements for creating and dropping existing indexes and constraints. " + "Note that only index types introduced before Neo4j 4.3 are included.")
@Procedure(name = "db.schemaStatements", mode = READ, deprecatedBy = "SHOW INDEXES YIELD * command and SHOW CONSTRAINTS YIELD * command")
public Stream<SchemaStatementResult> schemaStatements() throws ProcedureException {
    if (callContext.isSystemDatabase()) {
        return Stream.empty();
    }
    SchemaReadCore schemaRead = kernelTransaction.schemaRead().snapshot();
    final TokenRead tokenRead = kernelTransaction.tokenRead();
    return SchemaStatementProcedure.createSchemaStatementResults(schemaRead, tokenRead).stream();
}

Example 7 with SystemProcedure

use of org.neo4j.kernel.api.procedure.SystemProcedure in project neo4j by neo4j.

the class BuiltInProcedures method listRelationshipTypes.

@SystemProcedure
@Description("List all available relationship types in the database.")
@Procedure(name = "db.relationshipTypes", mode = READ)
public Stream<RelationshipTypeResult> listRelationshipTypes() {
    if (callContext.isSystemDatabase()) {
        return Stream.empty();
    }
    AccessMode mode = kernelTransaction.securityContext().mode();
    TokenRead tokenRead = kernelTransaction.tokenRead();
    List<RelationshipTypeResult> relTypesInUse;
    try (KernelTransaction.Revertable ignore = kernelTransaction.overrideWith(SecurityContext.AUTH_DISABLED)) {
        // Get all relTypes that are in use as seen by a super user
        relTypesInUse = stream(RELATIONSHIP_TYPES.inUse(kernelTransaction)).filter(type -> mode.allowsTraverseRelType(tokenRead.relationshipType(type.name()))).map(RelationshipTypeResult::new).collect(Collectors.toList());
    }
    return relTypesInUse.stream();
}

Example 8 with SystemProcedure

use of org.neo4j.kernel.api.procedure.SystemProcedure in project neo4j by neo4j.

the class BuiltInProcedures method listIndexes.

@Deprecated(since = "4.2.0", forRemoval = true)
@SystemProcedure
@Description("List all indexes in the database.")
@Procedure(name = "db.indexes", mode = READ, deprecatedBy = "SHOW INDEXES command")
public Stream<IndexResult> listIndexes() {
    if (callContext.isSystemDatabase()) {
        return Stream.empty();
    }
    TokenRead tokenRead = kernelTransaction.tokenRead();
    IndexingService indexingService = resolver.resolveDependency(IndexingService.class);
    SchemaReadCore schemaRead = kernelTransaction.schemaRead().snapshot();
    List<IndexDescriptor> indexes = asList(schemaRead.indexesGetAll());
    List<IndexResult> result = new ArrayList<>();
    for (IndexDescriptor index : indexes) {
        IndexResult indexResult;
        indexResult = asIndexResult(tokenRead, schemaRead, index);
        result.add(indexResult);
    }
    result.sort(Comparator.comparing(r -> r.name));
    return result.stream();
}

Example 9 with SystemProcedure

use of org.neo4j.kernel.api.procedure.SystemProcedure in project neo4j by neo4j.

the class FulltextProcedures method queryFulltextForRelationships.

@SystemProcedure
@Description("Query the given full-text index. Returns the matching relationships, and their Lucene query score, ordered by score. " + "Valid keys for the options map are: 'skip' to skip the top N results; 'limit' to limit the number of results returned.")
@Procedure(name = "db.index.fulltext.queryRelationships", mode = READ)
public Stream<RelationshipOutput> queryFulltextForRelationships(@Name("indexName") String name, @Name("queryString") String query, @Name(value = "options", defaultValue = "{}") Map<String, Object> options) throws Exception {
    if (callContext.isSystemDatabase()) {
        return Stream.empty();
    }
    IndexDescriptor indexReference = getValidIndex(name);
    awaitOnline(indexReference);
    EntityType entityType = indexReference.schema().entityType();
    if (entityType != RELATIONSHIP) {
        throw new IllegalArgumentException("The '" + name + "' index (" + indexReference + ") is an index on " + entityType + ", so it cannot be queried for relationships.");
    }
    RelationshipValueIndexCursor cursor = tx.cursors().allocateRelationshipValueIndexCursor(tx.cursorContext(), tx.memoryTracker());
    IndexReadSession indexReadSession = tx.dataRead().indexReadSession(indexReference);
    IndexQueryConstraints constraints = queryConstraints(options);
    tx.dataRead().relationshipIndexSeek(indexReadSession, cursor, constraints, PropertyIndexQuery.fulltextSearch(query));
    Spliterator<RelationshipOutput> spliterator = new SpliteratorAdaptor<>() {

        @Override
        public boolean tryAdvance(Consumer<? super RelationshipOutput> action) {
            while (cursor.next()) {
                long relationshipReference = cursor.relationshipReference();
                float score = cursor.score();
                RelationshipOutput relationshipOutput = RelationshipOutput.forExistingEntityOrNull(transaction, relationshipReference, score);
                if (relationshipOutput != null) {
                    action.accept(relationshipOutput);
                    return true;
                }
            }
            cursor.close();
            return false;
        }
    };
    return StreamSupport.stream(spliterator, false).onClose(cursor::close);
}

Example 10 with SystemProcedure

use of org.neo4j.kernel.api.procedure.SystemProcedure in project neo4j by neo4j.

the class ProcedureCompiler method compileProcedure.

private CallableProcedure compileProcedure(Class<?> procDefinition, Method method, String warning, boolean fullAccess, QualifiedName procName) throws ProcedureException {
    List<FieldSignature> inputSignature = inputSignatureDeterminer.signatureFor(method);
    List<FieldSignature> outputSignature = outputSignatureCompiler.fieldSignatures(method);
    String description = description(method);
    Procedure procedure = method.getAnnotation(Procedure.class);
    Mode mode = procedure.mode();
    boolean admin = method.isAnnotationPresent(Admin.class);
    boolean systemProcedure = method.isAnnotationPresent(SystemProcedure.class);
    boolean allowExpiredCredentials = systemProcedure ? method.getAnnotation(SystemProcedure.class).allowExpiredCredentials() : false;
    boolean internal = method.isAnnotationPresent(Internal.class);
    String deprecated = deprecated(method, procedure::deprecatedBy, "Use of @Procedure(deprecatedBy) without @Deprecated in " + procName);
    List<FieldSetter> setters = allFieldInjections.setters(procDefinition);
    if (!fullAccess && !config.fullAccessFor(procName.toString())) {
        try {
            setters = safeFieldInjections.setters(procDefinition);
        } catch (ComponentInjectionException e) {
            description = describeAndLogLoadFailure(procName);
            ProcedureSignature signature = new ProcedureSignature(procName, inputSignature, outputSignature, Mode.DEFAULT, admin, null, new String[0], description, warning, procedure.eager(), false, systemProcedure, internal, allowExpiredCredentials);
            return new FailedLoadProcedure(signature);
        }
    }
    ProcedureSignature signature = new ProcedureSignature(procName, inputSignature, outputSignature, mode, admin, deprecated, config.rolesFor(procName.toString()), description, warning, procedure.eager(), false, systemProcedure, internal, allowExpiredCredentials);
    return ProcedureCompilation.compileProcedure(signature, setters, method);
}