/** Generates the code for the checker. */
protected void addChecker(
Context ctxt,
MibNode node,
String description,
String syntax,
String var,
StringBuffer buff) {
buff.append(
Def.TAB
+ "/**\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.checker", var)
+ "\n"
+ Def.TAB
+ " */\n");
buff.append(
Def.TAB + Def.PUBLIC + Def.VOID + Def.CHECK + var + "(" + syntax + "x) " + accessThrows);
buff.append(
Def.TAB2
+ "//\n"
+ Def.TAB2
+ "// "
+ MessageHandler.getMessage("generate.mbean.comment.checker.policy")
+ "\n"
+ Def.TAB2
+ "//\n");
buff.append(Def.TAB + Def.RBRACE + "\n");
}
private void addRowStatusSetter(
Context ctxt,
MibNode node,
String description,
String syntax,
String var,
StringBuffer buff) {
buff.append(
Def.TAB
+ "/**\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.setter", var)
+ "\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment." + "setter.rs.nochecker")
+ "\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment." + "checker.rs.override")
+ "\n"
+ Def.TAB
+ " */\n");
buff.append(
Def.TAB + Def.PUBLIC + Def.VOID + Def.SET + var + "(" + syntax + "x) " + accessThrows);
buff.append(Def.TAB2 + var + " = x" + Def.SEMICOLON);
buff.append(Def.TAB + Def.RBRACE + "\n");
}
protected void buildConstructorHeader() throws IOException {
constructor1.append(
"\n"
+ Def.TAB
+ "/**\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.constr", symboleName)
+ "\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.noRegistration")
+ "\n"
+ Def.TAB
+ " */\n");
constructor1.append(Def.TAB + Def.PUBLIC + symboleName + "(SnmpMib myMib)" + Def.LBRACE);
constructor2.append(
"\n"
+ Def.TAB
+ "/**\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.constr", symboleName)
+ "\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.registration")
+ "\n"
+ Def.TAB
+ " */\n");
constructor2.append(
Def.TAB + Def.PUBLIC + symboleName + "(SnmpMib myMib, MBeanServer server)" + Def.LBRACE);
}
@Override
public void close() throws IOException {
bout.close();
output.close();
Iterator<MessageHandler> it = config.getMessagerHandlers();
while (it.hasNext()) {
MessageHandler handler = it.next();
handler.handleRequest(url, bout.toByteArray());
}
}
public void init() throws ServletException {
ServletContext ctx = getServletContext();
remoteHost =
ctx.getInitParameter("RMI_SERVER"); // Reads the value from the <context-param> in web.xml
mh = new MessageHandler(); // Instantiate message handler on service start
vmh =
new VigenereRequestManager(
mh.getQueue(),
mh.getMap(),
remoteHost); // Instansiate Request manager at service start with references to same
// queue and map as message handler
executorService.execute(vmh); // Run the Request service daemon
}
@Override
public InputStream getContent() throws IOException {
InputStream in;
try {
successful = true;
in = connection.getInputStream();
} catch (IOException e) {
successful = false;
in = connection.getErrorStream();
if (in == null) {
throw e;
}
}
String encoding = connection.getHeaderField("Content-Encoding");
if (config.getMaxResponseSize() > 0) {
in = new LimitingInputStream(config.getMaxResponseSize(), in);
}
if ("gzip".equals(encoding)) {
in = new GZIPInputStream(in);
}
if (config.hasMessageHandlers() || config.isTraceMessage()) {
byte[] bytes = FileUtil.toBytes(in);
in = new ByteArrayInputStream(bytes);
if (config.hasMessageHandlers()) {
Iterator<MessageHandler> it = config.getMessagerHandlers();
while (it.hasNext()) {
MessageHandler handler = it.next();
if (handler instanceof MessageHandlerWithHeaders) {
((MessageHandlerWithHeaders) handler)
.handleResponse(url, bytes, connection.getHeaderFields());
} else {
handler.handleResponse(url, bytes);
}
}
}
if (config.isTraceMessage()) {
new TeeInputStream(config, bytes);
}
}
return in;
}
public MbeanGenerator(ResourceManager mgr, MibNode aGroup, Context ctxt) throws IOException {
super(mgr, aGroup, ctxt);
gentype = ctxt.gentype;
// Specify oid of the current bean ...
//
oid = node.getComputedOid();
// Try to find a symbol to associate to the group
//
varName = node.getSymbolName();
if (varName == null) varName = getClassName(node.getComputedOid());
symboleName = getNodeSymbolName(node);
Trace.info(MessageHandler.getMessage("generate.info.var", varName));
// Open the file which will represent the M-bean.
//
out = openFile(symboleName + Def.JAVA);
// Write generic header ...
//
writeHeader();
// write our own header ...
//
writeClassDeclaration();
// write the beginning of the constructor
//
buildConstructorHeader();
}
private void addRowStatusChecker(
Context ctxt,
MibNode node,
String description,
String syntax,
String var,
StringBuffer buff) {
buff.append(
Def.TAB
+ "/**\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.checker", var)
+ "\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.checker.rs.deprecated")
+ "\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.checker.rs.override")
+ "\n"
+ Def.TAB
+ " */\n");
buff.append(
Def.TAB
+ Def.PUBLIC
+ Def.VOID
+ Def.CHECK
+ var
+ "("
+ syntax
+ "x) "
+ BeanGenerator.accessThrows);
buff.append(
Def.TAB2
+ "//\n"
+ Def.TAB2
+ "// "
+ MessageHandler.getMessage("generate.mbean.comment.checker.rs.policy")
+ "\n"
+ Def.TAB2
+ "//\n");
buff.append(Def.TAB + Def.RBRACE + "\n");
}
protected void addCacheVar(MibNode node, String syntax, long fixed, String init, String var)
throws IOException {
// Put some comments ...
//
var_list.append(
Def.TAB
+ "/**\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.varUse", var)
+ "\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.varOid", node.getOid())
+ "\n"
+ Def.TAB);
if (fixed != -1) {
var_list.append(
" * "
+ MessageHandler.getMessage("generate.mbean.comment.varFix", String.valueOf(fixed))
+ "\n"
+ Def.TAB);
}
// Shall we put the description in the generated code ?
// if yes call the formatDescription method ...
// The answer is yes if requested !
if (mib.isDescriptionOn()) {
// Get the object definition associated to the node
//
ASTObjectTypeDefinition definition = node.getObjectType();
String description = definition.getDefinition().getDescription();
var_list.append(formatDescription(description));
}
var_list.append(" */\n");
if (init == null) init = "";
// Declare the variable
//
var_list.append(Def.TAB + Def.PROTECTED + syntax + var + init + Def.SEMICOLON + "\n");
}
protected void writeClassDeclaration() throws IOException {
// Add some comments
//
write(
"/**\n"
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.desc", varName)
+ "\n"
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.oid", oid)
+ "\n"
+ " */\n");
write(
Def.PUBLIC
+ Def.CLASS
+ symboleName
+ Def.IMPLEMENT
+ symboleName
+ Def.MBEANSUFFIX
+ ", "
+ Def.SERIALIZABLE
+ Def.LBRACE
+ "\n");
}
private void outputMessage(String msg, int msgType) {
if (isInterrupted()) {
return;
}
if (m_msgHandler != null) {
m_msgHandler.outputMessage(msg + "\n", msgType);
} else {
try {
m_outWriter.write(msg);
m_outWriter.newLine();
} catch (Exception ex) {
System.err.println(msg);
}
}
}
public void run() {
try {
setConfig(ConfigManager.getCurrentConfig());
if (m_outWriter == null && m_msgHandler == null) {
useLocalWriter = true;
} else {
useLocalWriter = false;
}
if (useLocalWriter) {
openOutputFile();
}
checkRules();
if (useLocalWriter) {
closeOutputFile();
}
} finally {
if (m_msgHandler != null) {
m_msgHandler.close();
}
}
}
/** Generates the code for the getter. */
protected void addGetter(
Context ctxt,
MibNode node,
String description,
String syntax,
String var,
StringBuffer buff) {
buff.append(
Def.TAB
+ "/**\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.getter", var)
+ "\n"
+ Def.TAB
+ " */\n");
buff.append(Def.TAB + Def.PUBLIC + syntax + Def.GET + var + "() " + accessThrows);
buff.append(Def.TAB2 + Def.RETURN + var + Def.SEMICOLON);
buff.append(Def.TAB + Def.RBRACE + "\n");
}
/** Process table. */
protected void handleTable(MibNode node) throws IOException {
// create a table generator
//
TableBeanGenerator table = new TableBeanGenerator(manager, node, context);
// The meta table generator is now created by the
// MetaBeanGenerator, which is more logic.
//
// // MetaTableGenerator metatable=
// // new MetaTableGenerator(manager, node, context);
// create a table generator interface
//
// TableBeanIfGenerator tableIf= new TableBeanIfGenerator(manager, packageName, prefix,
// targetDir, node, mib);
// Get the entry name
//
String entry = table.getEntryName();
// Get the table name
//
String tableName = table.getTableClassName();
// Name of the symbol
//
String variable = table.getSymbolName();
// Add cache variable for storing table
//
addCacheVar(node, tableName, (long) -1, null, variable);
// Initialize the table in the constructor
//
constructor1.append(
Def.TAB2 + variable + " = " + Def.NEW + tableName + "(myMib)" + Def.SEMICOLON);
constructor2.append(
Def.TAB2 + variable + " = " + Def.NEW + tableName + "(myMib, server)" + Def.SEMICOLON);
// Add access method on the table
//
accessors.append(
Def.TAB
+ "/**\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.table.access", variable)
+ "\n"
+ Def.TAB
+ " */\n");
accessors.append(
Def.TAB + Def.PUBLIC + tableName + Def.ACCESS + variable + "() " + accessThrows);
accessors.append(
Def.TAB2 + Def.RETURN + variable + Def.SEMICOLON + Def.TAB + Def.RBRACE + "\n");
// Show the table as an indexed property...
//
accessors.append(
Def.TAB
+ "/**\n"
+ Def.TAB
+ " * "
+ MessageHandler.getMessage("generate.mbean.comment.table.entry", variable)
+ "\n"
+ Def.TAB
+ " */\n");
accessors.append(
Def.TAB
+ Def.PUBLIC
+ entry
+ Def.MBEANSUFFIX
+ "[] "
+ Def.GET
+ variable
+ "() "
+ accessThrows);
accessors.append(
Def.TAB2
+ Def.RETURN
+ variable
+ ".getEntries()"
+ Def.SEMICOLON
+ Def.TAB
+ Def.RBRACE
+ "\n");
}
// Specify the version of mibgen used for generating the code
//
protected void writeVersion() throws IOException {
String msgid = "generate.version";
write("\n//\n// " + MessageHandler.getMessage(msgid, mib.getModuleName()) + "\n//\n\n");
}
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resp.setContentType("text/html");
PrintWriter out = resp.getWriter();
int maxKeyLength = Integer.parseInt(req.getParameter("frmMaxKeyLength"));
String cypherText = req.getParameter("frmCypherText");
String taskNumber = req.getParameter("frmStatus");
String plainText = null; // Holder for returned test
out.print("<html><head><title>Distributed Systems Assignment</title>");
out.print("</head>");
out.print("<body>");
if (taskNumber == null) {
jobNumber++;
taskNumber = new String("T" + jobNumber + " Quelength " + q.isEmpty());
// Make message object from input text
final OutMessage message = new OutMessage(jobNumber, cypherText, maxKeyLength);
// pass message to handler and onto queue in its own thread from pool
executorService.execute(
new Runnable() {
public void run() {
mh.add(message);
}
});
} else {
// Check out-queue for finished job
// copy plain text to string cypher2 to appear on page
plainText = mh.get(jobNumber);
}
out.print("<H1>Processing request for Job#: " + taskNumber + "</H1>");
out.print("<div id=\"r\"></div>");
out.print("RMI Server is located at " + remoteHost);
out.print("<P>Maximum Key Length: " + maxKeyLength);
out.print("<P>CypherText: " + cypherText);
out.print("<P>Decoded: " + plainText);
out.print(
"<P>This servlet should only be responsible for handling client request and returning responses. Everything else should be handled by different objects.");
out.print(
"<P>Note that any variables declared inside this doGet() method are thread safe. Anything defined at a class level is shared between HTTP requests.");
out.print("<P> Next Steps:");
out.print("<OL>");
out.print(
"<LI>Generate a big random number to use a a job number, or just increment a static long variable declared at a class level, e.g. jobNumber");
out.print(
"<LI>Create some type of a message request object from the maxKeyLength, cypherText and jobNumber.");
out.print("<LI>Add the message request object to a LinkedList or BlockingQueue (the IN-queue)");
out.print(
"<LI>Return the jobNumber to the client web browser with a wait interval using <meta http-equiv=\"refresh\" content=\"10\">. The content=\"10\" will wait for 10s.");
out.print("<LI>Have some process check the LinkedList or BlockingQueue for message requests ");
out.print(
"<LI>Poll a message request from the front of the queue and make an RMI call to the Vigenere Cypher Service");
out.print(
"<LI>Get the result and add to a Map (the OUT-queue) using the jobNumber and the key and the result as a value");
out.print(
"<LI>Return the cyphertext to the client next time a request for the jobNumber is received and delete the key / value pair from the Map.");
out.print("</OL>");
out.print("<form name=\"frmCracker\">");
out.print("<input name=\"frmMaxKeyLength\" type=\"hidden\" value=\"" + maxKeyLength + "\">");
out.print("<input name=\"frmCypherText\" type=\"hidden\" value=\"" + cypherText + "\">");
out.print("<input name=\"frmStatus\" type=\"hidden\" value=\"" + taskNumber + "\">");
out.print("</form>");
out.print("</body>");
out.print("</html>");
out.print("<script>");
out.print("var wait=setTimeout(\"document.frmCracker.submit();\", 10000);");
out.print("</script>");
/*-----------------------------------------------------------------------
* Next Steps: just in case you removed the above....
*-----------------------------------------------------------------------
* 1) Generate a big random number to use a a job number, or just increment a static long variable declared at a class level, e.g. jobNumber
* 2) Create some type of a "message request" object from the maxKeyLength, cypherText and jobNumber.
* 3) Add the "message request" object to a LinkedList or BlockingQueue (the IN-queue)
* 4) Return the jobNumber to the client web browser with a wait interval using <meta http-equiv="refresh" content="10">. The content="10" will wait for 10s.
* 4) Have some process check the LinkedList or BlockingQueue for "message requests"
* 5) Poll a "message request" from the front of the queue and make an RMI call to the Vigenere Cypher Service
* 6) Get the result and add to a Map (the OUT-queue) using the jobNumber and the key and the result as a value
* 7) Return the cyphertext to the client next time a request for the jobNumber is received and delete the key / value pair from the Map.
*/
// You can use this method to implement the functionality of an RMI client
//
}
