Examples with Description org.neo4j.procedure.Description used on opensource projects

Example 16 with Description

use of org.neo4j.procedure.Description in project neo4j-apoc-procedures by neo4j-contrib.

the class Graphs method fromCypher.

@Description("apoc.graph.fromCypher('statement',{params},'name',{properties}) - creates a virtual graph object for later processing")
@Procedure
public Stream<VirtualGraph> fromCypher(@Name("statement") String statement, @Name("params") Map<String, Object> params, @Name("name") String name, @Name("properties") Map<String, Object> properties) {
    params = params == null ? Collections.emptyMap() : params;
    Set<Node> nodes = new HashSet<>(1000);
    Set<Relationship> rels = new HashSet<>(1000);
    Map<String, Object> props = new HashMap<>(properties);
    db.execute(Cypher.withParamMapping(statement, params.keySet()), params).stream().forEach(row -> {
        row.forEach((k, v) -> {
            if (!extract(v, nodes, rels)) {
                props.put(k, v);
            }
        });
    });
    return Stream.of(new VirtualGraph(name, nodes, rels, props));
}

Example 17 with Description

use of org.neo4j.procedure.Description in project neo4j-apoc-procedures by neo4j-contrib.

the class Examples method movies.

@Procedure(mode = Mode.WRITE)
@Description("apoc.example.movies() | Creates the sample movies graph")
public Stream<ProgressInfo> movies() {
    long start = System.currentTimeMillis();
    String file = "movies.cypher";
    Result result = db.execute(Util.readResourceFile(file));
    QueryStatistics stats = result.getQueryStatistics();
    ProgressInfo progress = new ProgressInfo(file, "example movie database from themoviedb.org", "cypher").update(stats.getNodesCreated(), stats.getRelationshipsCreated(), stats.getPropertiesSet()).done(start);
    result.close();
    return Stream.of(progress);
}

Example 18 with Description

use of org.neo4j.procedure.Description in project neo4j by neo4j.

the class BuiltInDbmsProcedures method listConfig.

@Admin
@SystemProcedure
@Description("List the currently active config of Neo4j.")
@Procedure(name = "dbms.listConfig", mode = DBMS)
public Stream<ConfigResult> listConfig(@Name(value = "searchString", defaultValue = "") String searchString) {
    String lowerCasedSearchString = searchString.toLowerCase();
    List<ConfigResult> results = new ArrayList<>();
    Config config = graph.getDependencyResolver().resolveDependency(Config.class);
    config.getValues().forEach((setting, value) -> {
        if (!setting.internal() && setting.name().toLowerCase().contains(lowerCasedSearchString)) {
            results.add(new ConfigResult(setting, value));
        }
    });
    return results.stream().sorted(Comparator.comparing(c -> c.name));
}

Example 19 with Description

use of org.neo4j.procedure.Description in project neo4j by neo4j.

the class BuiltInDbmsProcedures method listTransactions.

@SystemProcedure
@Description("List all transactions currently executing at this instance that are visible to the user.")
@Procedure(name = "dbms.listTransactions", mode = DBMS)
public Stream<TransactionStatusResult> listTransactions() throws InvalidArgumentsException {
    ZoneId zoneId = getConfiguredTimeZone();
    List<TransactionStatusResult> result = new ArrayList<>();
    for (DatabaseContext databaseContext : getDatabaseManager().registeredDatabases().values()) {
        if (databaseContext.database().isStarted()) {
            DatabaseScope dbScope = new DatabaseScope(databaseContext.database().getNamedDatabaseId().name());
            Map<KernelTransactionHandle, Optional<QuerySnapshot>> handleQuerySnapshotsMap = new HashMap<>();
            for (KernelTransactionHandle tx : getExecutingTransactions(databaseContext)) {
                String username = tx.subject().username();
                var action = new AdminActionOnResource(SHOW_TRANSACTION, dbScope, new UserSegment(username));
                if (isSelfOrAllows(username, action)) {
                    handleQuerySnapshotsMap.put(tx, tx.executingQuery().map(ExecutingQuery::snapshot));
                }
            }
            TransactionDependenciesResolver transactionBlockerResolvers = new TransactionDependenciesResolver(handleQuerySnapshotsMap);
            for (KernelTransactionHandle tx : handleQuerySnapshotsMap.keySet()) {
                result.add(new TransactionStatusResult(databaseContext.databaseFacade().databaseName(), tx, transactionBlockerResolvers, handleQuerySnapshotsMap, zoneId));
            }
        }
    }
    return result.stream();
}

Example 20 with Description

use of org.neo4j.procedure.Description in project neo4j by neo4j.

the class BuiltInDbmsProcedures method clearAllQueryCaches.

@Admin
@SystemProcedure
@Description("Clears all query caches.")
@Procedure(name = "db.clearQueryCaches", mode = DBMS)
public Stream<StringResult> clearAllQueryCaches() {
    QueryExecutionEngine queryExecutionEngine = graph.getDependencyResolver().resolveDependency(QueryExecutionEngine.class);
    // this query itself does not count
    long numberOfClearedQueries = queryExecutionEngine.clearQueryCaches() - 1;
    String result = numberOfClearedQueries == 0 ? "Query cache already empty." : "Query caches successfully cleared of " + numberOfClearedQueries + " queries.";
    log.info("Called db.clearQueryCaches(): " + result);
    return Stream.of(new StringResult(result));
}