/**
* @param inputNode
* @param pw
*/
private void writeParameter(InputNode inputNode, PrintWriter pw) {
String id = inputNode.getID();
Object value = inputNode.getDefaultValue();
String valueString = "";
if (value instanceof String) {
valueString = (String) value;
}
writeSetProperty(id, valueString, pw);
}
/**
* @param warnings returns the warning messages.
* @return true if the workflow is valid; false otherwise.
*/
public boolean validate(List<String> warnings) {
// Empty
if (this.graph.getNodes().size() == 0) {
String message = "The workflow is empty.";
warnings.add(message);
}
// Input ports need to be connected.
Collection<Port> inputPorts = GraphUtil.getPorts(this.graph, Port.Kind.DATA_IN);
for (Port inputPort : inputPorts) {
Collection<Port> fromPorts = inputPort.getFromPorts();
if (fromPorts.size() == 0) {
Node node = inputPort.getNode();
String message = node.getID() + " has an unconnected input " + inputPort.getName();
warnings.add(message);
}
}
// Input nodes need to be connected.
for (InputNode inputNode : this.inputNodes) {
if (inputNode.getPort().getToPorts().size() == 0) {
String message = inputNode.getID() + " is not connected to any service.";
warnings.add(message);
}
}
// Cycle
if (GraphUtil.containsCycle(this.graph)) {
String message = "There is a cycle in the workflow, only acyclic workflows are supported";
warnings.add(message);
}
// Constants are not supported.
List<ConstantNode> constantNodes = GraphUtil.getNodes(this.graph, ConstantNode.class);
if (constantNodes.size() > 0) {
String message = "Constants are not supported for Jython scripts.";
warnings.add(message);
}
// If/endif are not supported.
List<IfNode> ifNodes = GraphUtil.getNodes(this.graph, IfNode.class);
List<EndifNode> endifNodes = GraphUtil.getNodes(this.graph, EndifNode.class);
if (ifNodes.size() > 0 || endifNodes.size() > 0) {
String message = "If/endif are not supported for Jython scripts.";
warnings.add(message);
}
if (warnings.size() > 0) {
return false;
} else {
// No error.
return true;
}
}
/** @param pw */
private void writeSetup(PrintWriter pw) {
// Initialize some variables.
pw.println(
GFAC_VARIABLE
+ " = "
+ PROPERTIES_VARIABLE
+ "."
+ GET_PROPERTY_METHOD
+ "('"
+ GFAC_VARIABLE
+ "')");
pw.println(
TOPIC_VARIABLE
+ " = "
+ PROPERTIES_VARIABLE
+ "."
+ GET_PROPERTY_METHOD
+ "('"
+ TOPIC_VARIABLE
+ "')");
pw.println(
BROKER_URL_VARIABLE
+ " = "
+ PROPERTIES_VARIABLE
+ "."
+ GET_PROPERTY_METHOD
+ "('"
+ BROKER_URL_VARIABLE
+ "')");
pw.println(
MESSAGE_BOX_URL_VARIABLE
+ " = "
+ PROPERTIES_VARIABLE
+ "."
+ GET_PROPERTY_METHOD
+ "('"
+ MESSAGE_BOX_URL_VARIABLE
+ "')");
// Initialize a notification sender.
// pw.println(NOTIFICATION_VARIABLE + " = " + NOTIFICATION_CLASS + "(" +
// BROKER_URL_VARIABLE + ", "
// + TOPIC_VARIABLE + ")");
// Send a START_WORKFLOW notification.
pw.println(NOTIFICATION_VARIABLE + "." + WORKFLOW_STARTED_METHOD + "(");
boolean first = true;
for (InputNode inputNode : this.inputNodes) {
String id = inputNode.getID();
if (first) {
first = false;
} else {
pw.println(",");
}
pw.print(TAB + id + "=" + PROPERTIES_VARIABLE + "." + GET_PROPERTY_METHOD + "('" + id + "')");
}
pw.println(")");
pw.println();
// The biggining of try
pw.println("try:");
}