public boolean packetArrived(PacketArrivedEvent evt) throws MathLinkException {
KernelLink ml = (KernelLink) evt.getSource();
if (evt.getPktType() == MathLink.TEXTPKT) {
resources.add(new Resource(evt.getPktType(), ml.getString()));
}
if (evt.getPktType() == MathLink.MESSAGEPKT) {
resources.add(new Resource(evt.getPktType(), ml.getString()));
}
for (Field field : MathLink.class.getFields()) {
if (field.getName().endsWith("PKT")) {
try {
if (evt.getPktType() == field.getInt(field)) {
System.out.println(
"Received Mathematica Packet: " + field.getName() + " (" + evt.getPktType() + ")");
}
} catch (IllegalArgumentException e) {
System.out.println(e.getMessage());
} catch (IllegalAccessException e) {
System.out.println(e.getMessage());
}
}
}
return true;
}
public void reconnect() throws MathLinkException {
kernelLink.removePacketListener(this);
kernelLink.close();
kernelLink = MathLinkFactory.createKernelLink(mlargs);
kernelLink.addPacketListener(this);
kernelLink.discardAnswer();
}
public void evaluate(String query, boolean evalToImage, Session session)
throws MathLinkException, IOException {
int currentResource = -1;
long mark = System.currentTimeMillis();
session.sendInline("<div id='resource_" + currentCount + "' class='cellgroup'>");
// Log the input
Resource input = new Resource(query);
resources.add(input);
currentResource = resources.size();
session.sendInline(input.render(true));
kernelLink.evaluate(query);
kernelLink.waitForAnswer();
Expr result = kernelLink.getExpr();
// Append intermediate packets received by listener callback
while (currentResource < resources.size()) {
session.sendInline(resources.get(currentResource).render(true));
currentResource++;
}
if (!result.equals(NULLEXPR)) {
// Log the output as fullform text
Resource textResource = new Resource(MathLink.RETURNPKT, result);
byte[] data = null;
if (evalToImage || textResource.isGraphics()) data = kernelLink.evaluateToImage(result, 0, 0);
if (data != null) {
Resource graphicsResource = new Resource(MathLink.DISPLAYPKT, data);
resources.add(graphicsResource);
session.sendInline(graphicsResource.render(true));
textResource.subdue();
session.sendInline(textResource.render(false));
} else {
session.sendInline(textResource.render(true));
}
resources.add(textResource);
}
// Done with this. Move on...
kernelLink.newPacket();
currentCount++;
input.setTime(System.currentTimeMillis() - mark);
session.sendInline("<div class='time'>" + commify(input.getTime()) + "ms</div></div>");
}
public Resources(String sessionId, String cacheFolder, String[] mlargs)
throws MathLinkException, IOException {
this.sessionId = sessionId;
this.cacheFolder = cacheFolder;
this.mlargs = mlargs;
this.resources = new ArrayList<Resources.Resource>();
// Allocate the kernel link and register packet listener
kernelLink = MathLinkFactory.createKernelLink(mlargs);
kernelLink.addPacketListener(this);
kernelLink.discardAnswer();
// Create cache folder
File sessionFolderPointer = getSessionFolder();
if (sessionFolderPointer.exists()) delete(sessionFolderPointer);
sessionFolderPointer.mkdir();
}
public void close() {
// Close the kernel link
kernelLink.close();
// Release all allocated resources
release();
// Delete the cache folder (it should be empty now)
File cacheFp = getSessionFolder();
if (cacheFp.exists()) cacheFp.delete();
}
public String getSuggestions() throws MathLinkException, ExprFormatException {
StringBuilder result = new StringBuilder();
result.append("[");
kernelLink.evaluate("$ContextPath");
kernelLink.waitForAnswer();
Expr contexts = kernelLink.getExpr();
for (int j = 1; j <= contexts.length(); j++) {
String context = contexts.part(j).asString();
kernelLink.evaluate("Names[\"" + context + "*\"]");
kernelLink.waitForAnswer();
Expr symbols = kernelLink.getExpr();
for (int i = 1; i <= symbols.length(); i++) {
result.append('"');
result.append(symbols.part(i).asString());
result.append('"');
result.append(",");
}
}
result.append("]");
return result.toString();
}
