Class: OPCUA::Client::cVarNode

Inherits:
cNode
  • Object
show all
Defined in:
ext/opcua/client/client.c

Instance Method Summary collapse

Methods inherited from cNode

#id, #to_s, #unsubscribe

Instance Method Details

#on_change ⇒ Object

{{{



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# File 'ext/opcua/client/client.c', line 91

static VALUE node_on_change(VALUE self) { //{{{
  node_struct *ns;
  Data_Get_Struct(self, node_struct, ns);
  if (!ns->master->started) rb_raise(rb_eRuntimeError, "Client disconnected.");

  if (!rb_block_given_p())
    rb_raise(rb_eArgError, "you need to supply a block with #on_change");

  ns->on_change = rb_block_proc();
  rb_gc_register_address(&ns->on_change);

  rb_ary_push(ns->master->subs,self);

  return self;
}

#on_value_change ⇒ Object

{{{



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# File 'ext/opcua/client/client.c', line 132

static VALUE node_on_value_change(VALUE self) { // {{{
  node_struct *ns;
  Data_Get_Struct(self, node_struct, ns);
  if (!ns->master->started) rb_raise(rb_eRuntimeError, "Client disconnected.");

  if (!rb_block_given_p())
    rb_raise(rb_eArgError, "you need to supply a block with #on_change");

  UA_CreateSubscriptionRequest sreq; UA_CreateSubscriptionRequest_init(&sreq);
  sreq.requestedPublishingInterval = 100;
  sreq.requestedLifetimeCount = 10000;
  sreq.requestedMaxKeepAliveCount = 10;
  sreq.maxNotificationsPerPublish = 0;
  sreq.publishingEnabled = true;
  sreq.priority = 0;

  UA_CreateSubscriptionResponse sres = UA_Client_Subscriptions_create(ns->master->master, sreq, NULL, NULL, NULL);
  if (sres.responseHeader.serviceResult != UA_STATUSCODE_GOOD)
    rb_raise(rb_eRuntimeError, "Subscription could not be created.");

  VALUE ins = rb_ary_new2(2);
  rb_ary_store(ins,0,self);
  rb_ary_store(ins,1,rb_block_proc());
  ns->waiting = 0;

  UA_MonitoredItemCreateRequest monRequest = UA_MonitoredItemCreateRequest_default(ns->id);
  UA_MonitoredItemCreateResult monResponse =
  UA_Client_MonitoredItems_createDataChange(ns->master->master, sres.subscriptionId,
                                            UA_TIMESTAMPSTORETURN_BOTH,
                                            monRequest, (void *)ins, node_on_value_change_handler, NULL);

  if(monResponse.statusCode != UA_STATUSCODE_GOOD) {
    rb_raise(rb_eRuntimeError, "Monitoring item failed: %s\n", UA_StatusCode_name(monResponse.statusCode));
  }

  keepRunning = true;
  signal(SIGINT, intHandler);
  while (ns->waiting < 2 && keepRunning) {
    UA_Client_run_iterate(ns->master->master, 100);
  }
  signal(SIGINT, SIG_DFL);  // reset the disposition for SIGINT to the default

  UA_MonitoredItemCreateResult_clear(&monResponse);
  UA_MonitoredItemCreateRequest_clear(&monRequest);

  UA_Client_Subscriptions_deleteSingle(ns->master->master, sres.subscriptionId);
  UA_CreateSubscriptionResponse_clear(&sres);
  UA_CreateSubscriptionRequest_clear(&sreq);

  return self;
}

#value ⇒ Object

{{{



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# File 'ext/opcua/client/client.c', line 45

static VALUE node_value(VALUE self) { //{{{
  node_struct *ns;
  Data_Get_Struct(self, node_struct, ns);
  if (!ns->master->started) rb_raise(rb_eRuntimeError, "Client disconnected.");

  UA_Variant value;
  UA_Variant_init(&value);
  UA_StatusCode retval = UA_Client_readValueAttribute(ns->master->master, ns->id, &value);

  VALUE ret = Qnil;
  if (retval == UA_STATUSCODE_GOOD) {
    ret = extract_value(value);
  }

  UA_Variant_clear(&value);
  return rb_ary_entry(ret,0);
}

#value=(value) ⇒ Object

{{{



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# File 'ext/opcua/client/client.c', line 62

static VALUE node_value_set(VALUE self, VALUE value) { //{{{
  node_struct *ns;
  Data_Get_Struct(self, node_struct, ns);
  if (!ns->master->started) rb_raise(rb_eRuntimeError, "Client disconnected.");

  UA_Variant variant;
  UA_NodeId pdt;
  UA_Client_readDataTypeAttribute(ns->master->master, ns->id, &pdt);
  UA_UInt32 proposal = -1;
  if (pdt.namespaceIndex == 0) {
    proposal = pdt.identifier.numeric - 1; // what a dirty hack TODO, translate node to value
  }

  if (value_to_variant(value,&variant,proposal)) {
    // printf("-----------------------------------------%ld\n",variant.arrayDimensionsSize);
    if (variant.arrayDimensionsSize > 0) {
       UA_Int32 ads = (UA_Int32) variant.arrayDimensionsSize;
       UA_Client_writeValueRankAttribute(ns->master->master, ns->id, &ads);
       UA_Client_writeArrayDimensionsAttribute(ns->master->master, ns->id, variant.arrayDimensionsSize, variant.arrayDimensions);
     }

    UA_StatusCode retval = UA_Client_writeValueAttribute(ns->master->master, ns->id, &variant);
    if (retval != UA_STATUSCODE_GOOD) {
      rb_raise(rb_eRuntimeError, "Can't set value: %s.", UA_StatusCode_name(retval));
    }
  }

  return self;
}