- * It must be instantiated with a {@link HttpCallback} object to which - * requests are given and must be handled. - *
- * Simple synchronization between the client(s) and server can be done
- * using the {@link #waitForCondition(String)}, {@link #setCondition(String)} and
- * {@link #rendezvous(String,int)} methods.
- *
- * NOTE NOTE NOTE NOTE NOTE NOTE NOTE
- *
- * If changes are made here, please sure they are propagated to
- * the HTTPS equivalent in the JSSE regression test suite.
- *
- * NOTE NOTE NOTE NOTE NOTE NOTE NOTE
- */
-
-public class HttpServer {
-
- ServerSocketChannel schan;
- int threads;
- int cperthread;
- HttpCallback cb;
- Server[] servers;
-
- /**
- * Create a
- * A rendezvous built on a condition is also provided for synchronizing
- * N threads.
- */
-
- private static HashMap conditions = new HashMap();
-
- /*
- * Modifiable boolean object
- */
- private static class BValue {
- boolean v;
- }
-
- /*
- * Modifiable int object
- */
- private static class IValue {
- int v;
- IValue (int i) {
- v =i;
- }
- }
-
-
- private static BValue getCond (String condition) {
- synchronized (conditions) {
- BValue cond = (BValue) conditions.get (condition);
- if (cond == null) {
- cond = new BValue();
- conditions.put (condition, cond);
- }
- return cond;
- }
- }
-
- /**
- * Set the condition to true. Any threads that are currently blocked
- * waiting on the condition, will be unblocked and allowed to continue.
- * Threads that subsequently call waitForCondition() will not block.
- * If the named condition did not exist prior to the call, then it is created
- * first.
- */
-
- public static void setCondition (String condition) {
- BValue cond = getCond (condition);
- synchronized (cond) {
- if (cond.v) {
- return;
- }
- cond.v = true;
- cond.notifyAll();
- }
- }
-
- /**
- * If the named condition does not exist, then it is created and initialized
- * to false. If the condition exists or has just been created and its value
- * is false, then the thread blocks until another thread sets the condition.
- * If the condition exists and is already set to true, then this call returns
- * immediately without blocking.
- */
-
- public static void waitForCondition (String condition) {
- BValue cond = getCond (condition);
- synchronized (cond) {
- if (!cond.v) {
- try {
- cond.wait();
- } catch (InterruptedException e) {}
- }
- }
- }
-
- /* conditions must be locked when accessing this */
- static HashMap rv = new HashMap();
-
- /**
- * Force N threads to rendezvous (ie. wait for each other) before proceeding.
- * The first thread(s) to call are blocked until the last
- * thread makes the call. Then all threads continue.
- *
- * All threads that call with the same condition name, must use the same value
- * for N (or the results may be not be as expected).
- *
- * Obviously, if fewer than N threads make the rendezvous then the result
- * will be a hang.
- */
-
- public static void rendezvous (String condition, int N) {
- BValue cond;
- IValue iv;
- String name = "RV_"+condition;
-
- /* get the condition */
-
- synchronized (conditions) {
- cond = (BValue)conditions.get (name);
- if (cond == null) {
- /* we are first caller */
- if (N < 2) {
- throw new RuntimeException ("rendezvous must be called with N >= 2");
- }
- cond = new BValue ();
- conditions.put (name, cond);
- iv = new IValue (N-1);
- rv.put (name, iv);
- } else {
- /* already initialised, just decrement the counter */
- iv = (IValue) rv.get (name);
- iv.v --;
- }
- }
-
- if (iv.v > 0) {
- waitForCondition (name);
- } else {
- setCondition (name);
- synchronized (conditions) {
- clearCondition (name);
- rv.remove (name);
- }
- }
- }
-
- /**
- * If the named condition exists and is set then remove it, so it can
- * be re-initialized and used again. If the condition does not exist, or
- * exists but is not set, then the call returns without doing anything.
- * Note, some higher level synchronization
- * may be needed between clear and the other operations.
- */
-
- public static void clearCondition(String condition) {
- BValue cond;
- synchronized (conditions) {
- cond = (BValue) conditions.get (condition);
- if (cond == null) {
- return;
- }
- synchronized (cond) {
- if (cond.v) {
- conditions.remove (condition);
- }
- }
- }
- }
-}
HttpServer instance with the specified callback object
- * for handling requests. One thread is created to handle requests,
- * and up to ten TCP connections will be handled simultaneously.
- * @param cb the callback object which is invoked to handle each
- * incoming request
- */
-
- public HttpServer (HttpCallback cb) throws IOException {
- this (cb, 1, 10, 0);
- }
-
- /**
- * Create a HttpServer instance with the specified number of
- * threads and maximum number of connections per thread. This functions
- * the same as the 4 arg constructor, where the port argument is set to zero.
- * @param cb the callback object which is invoked to handle each
- * incoming request
- * @param threads the number of threads to create to handle requests
- * in parallel
- * @param cperthread the number of simultaneous TCP connections to
- * handle per thread
- */
-
- public HttpServer (HttpCallback cb, int threads, int cperthread)
- throws IOException {
- this (cb, threads, cperthread, 0);
- }
-
- /**
- * Create a HttpServer instance with the specified number
- * of threads and maximum number of connections per thread and running on
- * the specified port. The specified number of threads are created to
- * handle incoming requests, and each thread is allowed
- * to handle a number of simultaneous TCP connections.
- * @param cb the callback object which is invoked to handle
- * each incoming request
- * @param threads the number of threads to create to handle
- * requests in parallel
- * @param cperthread the number of simultaneous TCP connections
- * to handle per thread
- * @param port the port number to bind the server to. Zero
- * means choose any free port.
- */
-
- public HttpServer (HttpCallback cb, int threads, int cperthread, int port)
- throws IOException {
- schan = ServerSocketChannel.open ();
- InetSocketAddress addr = new InetSocketAddress (port);
- schan.socket().bind (addr);
- this.threads = threads;
- this.cb = cb;
- this.cperthread = cperthread;
- servers = new Server [threads];
- for (int i=0; i