Examples with ReadContext org.eclipse.milo.opcua.sdk.server.api.services.AttributeServices.ReadContext used on opensource projects

Example 1 with ReadContext

use of org.eclipse.milo.opcua.sdk.server.api.services.AttributeServices.ReadContext in project milo by eclipse.

the class DefaultAttributeServiceSet method onRead.

@Override
public void onRead(ServiceRequest service) {
    ReadRequest request = (ReadRequest) service.getRequest();
    OpcUaServer server = service.attr(ServiceAttributes.SERVER_KEY).get();
    Session session = service.attr(ServiceAttributes.SESSION_KEY).get();
    List<ReadValueId> nodesToRead = l(request.getNodesToRead());
    if (nodesToRead.isEmpty()) {
        service.setServiceFault(StatusCodes.Bad_NothingToDo);
        return;
    }
    if (nodesToRead.size() > server.getConfig().getLimits().getMaxNodesPerRead().longValue()) {
        service.setServiceFault(StatusCodes.Bad_TooManyOperations);
        return;
    }
    if (request.getMaxAge() < 0d) {
        service.setServiceFault(StatusCodes.Bad_MaxAgeInvalid);
        return;
    }
    if (request.getTimestampsToReturn() == null) {
        service.setServiceFault(StatusCodes.Bad_TimestampsToReturnInvalid);
        return;
    }
    DiagnosticsContext<ReadValueId> diagnosticsContext = new DiagnosticsContext<>();
    ReadContext context = new ReadContext(server, session, diagnosticsContext);
    server.getAddressSpaceManager().read(context, request.getMaxAge(), request.getTimestampsToReturn(), nodesToRead);
    context.getFuture().thenAccept(values -> {
        ResponseHeader header = service.createResponseHeader();
        DiagnosticInfo[] diagnosticInfos = diagnosticsContext.getDiagnosticInfos(nodesToRead);
        ReadResponse response = new ReadResponse(header, values.toArray(new DataValue[0]), diagnosticInfos);
        service.setResponse(response);
    });
}

Example 2 with ReadContext

use of org.eclipse.milo.opcua.sdk.server.api.services.AttributeServices.ReadContext in project milo by eclipse.

the class SubscriptionManager method readMonitoringAttributes.

private CompletableFuture<Map<NodeId, AttributeGroup>> readMonitoringAttributes(List<NodeId> nodeIds) {
    List<ReadValueId> attributesToRead = nodeIds.stream().flatMap(nodeId -> {
        Function<AttributeId, ReadValueId> f = id -> new ReadValueId(nodeId, id.uid(), null, QualifiedName.NULL_VALUE);
        return Stream.of(f.apply(AttributeId.AccessLevel), f.apply(AttributeId.UserAccessLevel), f.apply(AttributeId.EventNotifier), f.apply(AttributeId.MinimumSamplingInterval), f.apply(AttributeId.DataType));
    }).collect(toList());
    ReadContext context = new ReadContext(server, session);
    server.getAddressSpaceManager().read(context, 0.0, TimestampsToReturn.Neither, attributesToRead);
    return context.getFuture().thenApply(attributeValues -> {
        Map<NodeId, AttributeGroup> monitoringAttributes = new HashMap<>();
        for (int nodeIdx = 0, attrIdx = 0; nodeIdx < nodeIds.size(); nodeIdx++, attrIdx += 5) {
            monitoringAttributes.put(nodeIds.get(nodeIdx), new AttributeGroup(attributeValues.get(attrIdx), attributeValues.get(attrIdx + 1), attributeValues.get(attrIdx + 2), attributeValues.get(attrIdx + 3), attributeValues.get(attrIdx + 4)));
        }
        return monitoringAttributes;
    });
}

Example 3 with ReadContext

use of org.eclipse.milo.opcua.sdk.server.api.services.AttributeServices.ReadContext in project milo by eclipse.

the class BrowsePathsHelper method readTargetBrowseNames.

private CompletableFuture<List<QualifiedName>> readTargetBrowseNames(List<ExpandedNodeId> targetNodeIds) {
    List<CompletableFuture<List<DataValue>>> futures = newArrayListWithCapacity(targetNodeIds.size());
    for (ExpandedNodeId xni : targetNodeIds) {
        CompletableFuture<List<DataValue>> future = xni.toNodeId(server.getNamespaceTable()).map(nodeId -> {
            ReadValueId readValueId = new ReadValueId(nodeId, AttributeId.BrowseName.uid(), null, QualifiedName.NULL_VALUE);
            ReadContext context = new ReadContext(server, null);
            server.getAddressSpaceManager().read(context, 0.0, TimestampsToReturn.Neither, newArrayList(readValueId));
            return context.getFuture();
        }).orElse(completedFuture(newArrayList(new DataValue(StatusCodes.Bad_NodeIdUnknown))));
        futures.add(future);
    }
    return sequence(futures).thenApply(values -> values.stream().map(l -> {
        DataValue v = l.get(0);
        return (QualifiedName) v.getValue().getValue();
    }).collect(toList()));
}