public void commitChanges(VariableInstance var, ScopeFrame scopeFrame, Node value)
throws ExternalVariableModuleException {
if (var.declaration.extVar != null) /* external variable */ {
if (__log.isDebugEnabled())
__log.debug(
"Write external variable: name="
+ var.declaration
+ " value="
+ DOMUtils.domToString(value));
VariableInstance related = scopeFrame.resolve(var.declaration.extVar.related);
Node reference = null;
try {
reference = fetchVariableData(var, scopeFrame, true);
} catch (FaultException fe) {
// In this context this is not necessarily a problem, since the assignment may re-init the
// related var
}
VariableContext.ValueReferencePair vrp = _brc.writeExtVar(var, reference, value);
commitChanges(related, scopeFrame, vrp.reference);
} else /* normal variable */ {
if (__log.isDebugEnabled())
__log.debug(
"Write variable: name=" + var.declaration + " value=" + DOMUtils.domToString(value));
_brc.commitChanges(var, value);
}
writeProperties(var, value);
}
public Node fetchVariableData(
VariableInstance variable, ScopeFrame scopeFrame, boolean forWriting) throws FaultException {
if (variable.declaration.extVar != null) {
// Note, that when using external variables, the database will not contain the value of the
// variable, instead we need to go the external variable subsystems.
Element reference =
(Element)
_brc.fetchVariableData(
scopeFrame.resolve(variable.declaration.extVar.related), false);
try {
Node ret = _brc.readExtVar(variable, reference);
if (ret == null) {
throw new FaultException(
_runtime._oprocess.constants.qnUninitializedVariable,
"The external variable \""
+ variable.declaration.name
+ "\" has not been initialized.");
}
return ret;
} catch (IncompleteKeyException ike) {
// This indicates that the external variable needed to be written do, put has not been.
__log.error(
"External variable could not be read due to incomplete key; the following key "
+ "components were missing: "
+ ike.getMissing());
throw new FaultException(
_runtime._oprocess.constants.qnUninitializedVariable,
"The extenral variable \""
+ variable.declaration.name
+ "\" has not been properly initialized;"
+ "the following key compoenents were missing:"
+ ike.getMissing());
} catch (ExternalVariableModuleException e) {
throw new BpelEngineException(e);
}
} else /* not external */ {
Node data = _brc.fetchVariableData(variable, forWriting);
if (data == null) {
// Special case of messageType variables with no part
if (variable.declaration.type instanceof OMessageVarType) {
OMessageVarType msgType = (OMessageVarType) variable.declaration.type;
if (msgType.parts.size() == 0) {
Document doc = DOMUtils.newDocument();
Element root = doc.createElement("message");
doc.appendChild(root);
return root;
}
}
throw new FaultException(
_runtime._oprocess.constants.qnUninitializedVariable,
"The variable " + variable.declaration.name + " isn't properly initialized.");
}
return data;
}
}