1.2.5 pre

1 files changed, 268 insertions, 90 deletions

diff --git a/src/Ivy.java b/src/Ivy.java
index b11d546..e3cc0bb 100755
--- a/src/Ivy.java
+++ b/src/Ivy.java
@@ -7,10 +7,28 @@
  *<pre>
  *Ivy bus = new Ivy("Dummy agent","ready",null);
  *bus.bindMsg("(.*)",myMessageListener);
- *bus.start(null);
+ *bus.start(getDomain(null));
  *</pre>
  *
  *  CHANGELOG:
+ *  1.2.4:
+ *    - added an accessor for doSendToSelf
+ *    - waitForMsg() and waitForClient() to make the synchronization with
+ *      other Ivy agents easier
+ *    - with the bindAsyncMsg() to subscribe and perform each callback in a
+ *      new Thread
+ *    - bindMsg(regexp,messagelistener,boolean) allow to subscribe with a
+ *      synchrone/asynch exectution
+ *    - API change, IvyException raised when \n or \0x3 are present in bus.sendMsg()
+ *    - bindListener are now handled
+ *    - removeApplicationListener can throw IvyException
+ *    - bus.start(null) now starts on getDomain(null), first the IVYBUS
+ *    property, then the DEFAULT_DOMAIN, 127:2010
+ *    - bindMsg() now throws an IvyException if the regexp is invalid !!!
+ *    BEWARE, this can impact lots of programs ! (fixes J007)
+ *    - no more includes the "broadcasting on " in the domain(String) method
+ *    - new function sendToSelf(boolean) allow us to send messages to
+ *    ourselves
  *  1.2.3:
  *    - adds a IVYBUS property to propagate the domain once set. This way,
  *    children forked through Ivy java can inherit from the current value.
@@ -19,7 +37,7 @@
  *    added the String domains(String d) function, in order to display the
  *  domain list
  *  1.2.1:
- *    bus.start(null) now starts on DEFAULT_DOMAIN
+ *    bus.start(null) now starts on DEFAULT_DOMAIN. ( correction 1.2.4 This was not true.)
  *    added the getDomains in order to correctly display the domain list
  *    checks if the serverThread exists before interrupting it
  *    no has unBindMsg(String)
@@ -44,11 +62,12 @@ public class Ivy implements Runnable {
   /**
    * the name of the application on the bus
    */
-  String appName;
+  protected String appName;
   /**
    * the protocol version number
    */
-  public static final int PROCOCOLVERSION = 3 ;
+  public static final int PROTOCOLVERSION = 3 ;
+  public static final int PROTOCOLMINIMUM = 3 ;
   /**
    * the port for the UDP rendez vous, if none is supplied
    */
@@ -61,24 +80,23 @@ public class Ivy implements Runnable {
    * the library version, useful for development purposes only, when java is
    * invoked with -DIVY_DEBUG
    */
-  public static final String libVersion ="1.2.3";
+  public static final String libVersion ="1.2.4";
 
   private boolean debug;
-  private static int serial=0;		/* an unique ID for each regexp */
   private static int clientSerial=0;	/* an unique ID for each IvyClient */
   private ServerSocket app;
   private Vector watchers;
   private volatile Thread serverThread; // to ensure quick communication of the end
-  private Hashtable callbacks = new Hashtable();
   private Hashtable clients = new Hashtable();
   private Vector ivyApplicationListenerList = new Vector();
-  private String messages_classes[] = null;
-  private boolean sendToSelf = false ;
+  private Vector ivyBindListenerList = new Vector();
+  private Vector sendThreads = new Vector();
   private boolean stopped = false;
-  int applicationPort;	/* Application port number */
-  Hashtable regexp_out = new Hashtable();
-  String ready_message = null;
-
+  protected int applicationPort;	/* Application port number */
+  protected  String ready_message = null;
+  protected boolean doProtectNewlines = false ;
+  private boolean doSendToSelf = false ;
+  protected SelfIvyClient selfIvyClient ;
   public final static int TIMEOUTLENGTH = 3000;
 	
   /**
@@ -96,6 +114,49 @@ public class Ivy implements Runnable {
     ready_message =  message;
     debug = (System.getProperty("IVY_DEBUG")!=null);
     if ( appcb != null ) ivyApplicationListenerList.addElement( appcb );
+    selfIvyClient=new SelfIvyClient(this,name);
+  }
+
+  /**
+   * Waits for a message to be received
+   *
+   * @since 1.2.4
+   * @param regexp the message we're waiting for to continue the main thread.
+   * @param timeout in millisecond, 0 if infinite
+   * @return the IvyClient who sent the message, or null if the timeout is
+   * reached
+   */
+  public IvyClient waitForMsg(String regexp,int timeout) throws IvyException {
+    Waiter w  = new Waiter(timeout);
+    int re = bindMsg(regexp,w);
+    IvyClient ic=w.waitFor();
+    unBindMsg(re);
+    return ic;
+  }
+
+  /**
+   * Waits for an other IvyClient to join the bus
+   *
+   * @since 1.2.4
+   * @param name the name of the client we're waiting for to continue the main thread.
+   * @param timeout in millisecond, 0 if infinite
+   * @return the first IvyClient with the name or null if the timeout is
+   * reached
+   */
+  public IvyClient waitForClient(String name,int timeout) throws IvyException {
+    IvyClient ic;
+    if (name==null) throw new IvyException("null name given to waitForClient");
+    // first check if client with the same name is on the bus
+    for (Enumeration e=clients.elements();e.hasMoreElements();) {
+       ic = (IvyClient)e.nextElement();
+      if (name.compareTo(ic.getApplicationName())==0) return ic;
+    }
+    // if not enter the waiting loop
+    WaiterClient w  = new WaiterClient(name,timeout);
+    int i = addApplicationListener(w);
+    ic=w.waitForClient();
+    removeApplicationListener(i);
+    return ic;
   }
 
   /**
@@ -113,7 +174,7 @@ public class Ivy implements Runnable {
    *
    */
   public void start(String domainbus) throws IvyException {
-    if (domainbus==null) domainbus=DEFAULT_DOMAIN;
+    if (domainbus==null) domainbus=getDomain(null);
     Properties sysProp = System.getProperties();
     sysProp.put("IVYBUS",domainbus);
     try {
@@ -123,7 +184,7 @@ public class Ivy implements Runnable {
     } catch (IOException e) {
       throw new IvyException("can't open TCP service socket " + e );
     }
-    traceDebug("lib: "+libVersion+" protocol: "+PROCOCOLVERSION+" TCP service open on port "+applicationPort);
+    traceDebug("lib: "+libVersion+" protocol: "+PROTOCOLVERSION+" TCP service open on port "+applicationPort);
     watchers = new Vector();
 
     Domain[] d = parseDomains(domainbus);
@@ -144,7 +205,11 @@ public class Ivy implements Runnable {
     int index=0;
     while  ( st.hasMoreTokens()) {
       String s = st.nextToken() ;
-      d[index++]=new Domain(IvyWatcher.getDomain(s),IvyWatcher.getPort(s));
+      try {
+	d[index++]=new Domain(IvyWatcher.getDomain(s),IvyWatcher.getPort(s));
+      } catch (IvyException ie) {
+	// do nothing
+      }
     }
     return d;
   }
@@ -177,31 +242,83 @@ public class Ivy implements Runnable {
   }
 
   /**
-   * Toggles the sending of messages to oneself
+   * Toggles the sending of messages to oneself, the remote client's
+   * IvyMessageListeners are processed first, and ourself afterwards.
+   * @param boolean true if you want to send the message to yourself. Default
+   * is false
+   * @since 1.2.4
+   */
+  public void sendToSelf(boolean b) {doSendToSelf=b;}
+
+  /**
+   * @param boolean do I send message to myself ?
+   * @since 1.2.4
+   */
+  public boolean isSendToSelf() {return doSendToSelf;}
+
+  /**
+   * returns our self IvyClient.
+   * @since 1.2.4
+   */
+  public IvyClient getSelfIvyClient() {return selfIvyClient;}
+
+  /**
+   * Toggles the encoding/decoding of messages to prevent bugs related to the
+   * presence of a "\n"
+   * @param boolean true if you want to send the message to yourself. Default
+   * is false.
+   * @since 1.2.5?
+   * The default escape character is a ESC 0x1A
+   */
+  private void protectNewlines(boolean b) {doProtectNewlines=b;}
+
+  /**
+   * Performs a pattern matching according to everyone's regexps, and sends
+   * the results to the relevant ivy agents sequentially
+   *
+   * @param message A String which will be compared to the regular
+   * expressions of the different clients
+   * @return the number of messages actually sent
+   */
+  public int sendMsg(String message) throws IvyException {
+    return sendMsg(message,false);
+  }
+
+  /**
+   * Performs a pattern matching according to everyone's regexps, and sends
+   * the results to the relevant ivy agents, using as many threads as needed.
    *
+   * @since 1.2.4
+   * @param message A String which will be compared to the regular
+   * expressions of the different clients
+   * @return always returns -1
    */
-  public void sendToSelf(boolean b) {sendToSelf=b;}
+  public int sendAsyncMsg(String message,boolean async) throws IvyException {
+    return sendMsg(message,true);
+  }
 
   /**
    * Performs a pattern matching according to everyone's regexps, and sends
    * the results to the relevant ivy agents.
-   * <p><em>There is one thread for each client connected, we could also
-   * create another thread each time we send a message.</em>
+   *
+   * @since 1.2.4
    * @param message A String which will be compared to the regular
    * expressions of the different clients
-   * @return the number of messages actually sent
+   * @param async if true, the sending will be performed in a separate thread,
+   * default is false
+   * @return if async is true, always returns -1, else returns the number of messages actually sent
    */
-  public int sendMsg( String message ) {
+  public int sendMsg(String message,boolean async) throws IvyException {
     int count = 0;
-    // an alternate implementation would one sender thread per client
-    // instead of one for all the clients. It might be a performance issue
+    if (doProtectNewlines)	
+      message=IvyClient.encode(message);
+    else if ( (message.indexOf(IvyClient.newLineChar)!=-1)||(message.indexOf(IvyClient.endArgChar)!=-1))
+      throw new IvyException("newline character not allowed in Ivy messages");
     for ( Enumeration e=clients.elements();e.hasMoreElements();) {
       IvyClient client = (IvyClient)e.nextElement();
-      count += client.sendMsg( message );
-    }
-    if (sendToSelf) {
-      // TODO
+      count += client.sendMsg(message, async);
     }
+    if (doSendToSelf) count+=selfIvyClient.sendSelfMsg(message);
     return count;
   }
 
@@ -221,17 +338,57 @@ public class Ivy implements Runnable {
    * interface, on the AWT/Swing framework
    * @return the id of the regular expression
    */
-  public int bindMsg(String regexp, IvyMessageListener callback ) {
-    // creates a new binding (regexp,callback)
-    Integer key = new Integer(serial++);
-    regexp_out.put(key,regexp);
-    callbacks.put(key,callback );
+  public int bindMsg(String sregexp, IvyMessageListener callback ) throws IvyException  {
+    return bindMsg(sregexp,callback,false);
+  }
+    
+  /**
+   * Subscribes to a regular expression with asyncrhonous callback execution.
+   *
+   * Same as bindMsg, except that the callback will be executed in a separate
+   * thread each time.
+   * WARNING : there is no way to predict the order of execution
+   * of the * callbacks, i.e. a message received might trigger a callback before
+   * another one sent before
+   *
+   * @since 1.2.4
+   * @param regexp a perl regular expression, groups are done with parenthesis
+   * @param callback any objects implementing the IvyMessageListener
+   * interface, on the AWT/Swing framework
+   * @return the int ID of the regular expression.
+   */
+  public int bindAsyncMsg(String sregexp, IvyMessageListener callback ) throws IvyException  {
+    return bindMsg(sregexp,callback,true);
+  }
+
+  /**
+   * Subscribes to a regular expression.
+   *
+   * The callback will be executed with
+   * the saved parameters of the regexp as arguments when a message will sent
+   * by another agent. A program <em>doesn't</em> receive its own messages.
+   * <p>Example:
+   * <br>the Ivy agent A performs <pre>b.bindMsg("^Hello (*)",cb);</pre>
+   * <br>the Ivy agent B performs <pre>b2.sendMsg("Hello world");</pre>
+   * <br>a thread in A will uun the callback cb with its second argument set
+   * to a array of String, with one single element, "world"
+   * @since 1.2.4
+   * @param regexp a perl regular expression, groups are done with parenthesis
+   * @param callback any objects implementing the IvyMessageListener
+   * interface, on the AWT/Swing framework
+   * @param async  if true, each callback will be run in a separate thread,
+   * default is false
+   * @return the id of the regular expression
+   */
+  public int bindMsg(String sregexp, IvyMessageListener callback,boolean async ) throws IvyException {
+    // adds the regexp to our collection in selfIvyClient
+    int key=selfIvyClient.bindMsg(sregexp,callback,async);
     // notifies the other clients this new regexp
     for (Enumeration e=clients.elements();e.hasMoreElements();) {
       IvyClient c = (IvyClient)e.nextElement();
-      c.sendRegexp(key.intValue(),regexp);
+      c.sendRegexp(key,sregexp);
     }
-    return key.intValue();
+    return key;
   }
 
   /**
@@ -240,14 +397,9 @@ public class Ivy implements Runnable {
    * @param id the id of the regular expression, returned when it was bound
    */
   public void unBindMsg(int id) throws IvyException {
-    Integer key = new Integer(id);
-    if ( ( regexp_out.remove(key) == null )
-         || (callbacks.remove(key) == null ) ) {
-      throw new IvyException("client wants to remove an unexistant regexp "+id);
-    }
-    for (Enumeration e=clients.elements();e.hasMoreElements();) {
+    selfIvyClient.unBindMsg(id);
+    for (Enumeration e=clients.elements();e.hasMoreElements();)
       ((IvyClient)e.nextElement()).delRegexp(id );
-    }
   }
 
   /**
@@ -258,18 +410,31 @@ public class Ivy implements Runnable {
    * @param String the string for the regular expression
    */
   public boolean unBindMsg(String re) {
-    for (Enumeration e=regexp_out.keys();e.hasMoreElements();) {
-      Integer k = (Integer)e.nextElement();
-      if ( ((String)regexp_out.get(k)).compareTo(re) == 0) {
-	try {
-	  unBindMsg(k.intValue());
-	} catch (IvyException ie) {
-	  return false;
-	}
-	return true;
-      }
+    return selfIvyClient.unBindMsg(re);
+  }
+
+  /**
+   * adds a bind listener to a bus
+   * @param callback is an object implementing the IvyBindListener interface
+   * @return the id of the bind listener, useful if you wish to remove it later
+   * @since 1.2.4
+   */
+  public int addBindListener(IvyBindListener callback){
+    ivyBindListenerList.addElement(callback);
+    return ivyBindListenerList.indexOf(callback);
+  }
+
+  /**
+   * removes a bind listener
+   * @param id the id of the bind listener to remove
+   * @since 1.2.4
+   */
+  public void removeBindListener(int id) throws IvyException {
+    try {
+      ivyBindListenerList.removeElementAt(id);
+    } catch (ArrayIndexOutOfBoundsException aie) {
+      throw new IvyException(id+" is not a valid Id");
     }
-    return false;
   }
 
   /**
@@ -281,32 +446,49 @@ public class Ivy implements Runnable {
    */
   public int addApplicationListener(IvyApplicationListener callback){
     ivyApplicationListenerList.addElement(callback);
-    int id = ivyApplicationListenerList.indexOf( callback );
-    return id;
+    return ivyApplicationListenerList.indexOf( callback );
   }
 
   /**
    * removes an application listener
    * @param id the id of the application listener to remove
    */
-  public void removeApplicationListener(int id){
-    ivyApplicationListenerList.removeElementAt(id);
+  public void removeApplicationListener(int id) throws IvyException {
+    try {
+      ivyApplicationListenerList.removeElementAt(id);
+    } catch (ArrayIndexOutOfBoundsException aie) {
+      throw new IvyException(id+" is not a valid Id");
+    }
   }
 
   /* invokes the application listeners upon arrival of a new Ivy client */
-  public void connect(IvyClient client){
+  protected void clientConnects(IvyClient client){
     for ( int i = 0 ; i < ivyApplicationListenerList.size(); i++ ) {
       ((IvyApplicationListener)ivyApplicationListenerList.elementAt(i)).connect(client);
     }
   }
 
-  /* invokes the application listeners upon arrival of a new Ivy client */
-  void disconnectReceived(IvyClient client){
+  /* invokes the application listeners upon the departure of an Ivy client */
+  protected void clientDisconnects(IvyClient client){
     for ( int i = 0 ; i < ivyApplicationListenerList.size(); i++ ) {
       ((IvyApplicationListener)ivyApplicationListenerList.elementAt(i)).disconnect(client);
     }
   }
 
+  /* invokes the bind listeners */
+  protected void regexpReceived(IvyClient client,int id,String sregexp){
+    for ( int i = 0 ; i < ivyBindListenerList.size(); i++ ) {
+      ((IvyBindListener)ivyBindListenerList.elementAt(i)).bindPerformed(client,id,sregexp);
+    }
+  }
+
+  /* invokes the bind listeners */
+  protected void regexpDeleted(IvyClient client,int id,String sregexp){
+    for ( int i = 0 ; i < ivyBindListenerList.size(); i++ ) {
+      ((IvyBindListener)ivyBindListenerList.elementAt(i)).unbindPerformed(client,id,sregexp);
+    }
+  }
+
   /*
    * removes a client from the list
    */
@@ -316,9 +498,9 @@ public class Ivy implements Runnable {
    * invokes the application listeners when we are summoned to die
    * then stops
    */
-  public void dieReceived(IvyClient client, int id){
+  public void dieReceived(IvyClient client, int id,String message){
     for ( int i=0 ;i<ivyApplicationListenerList.size();i++ ) {
-      ((IvyApplicationListener)ivyApplicationListenerList.elementAt(i)).die(client,id);
+      ((IvyApplicationListener)ivyApplicationListenerList.elementAt(i)).die(client,id,message);
     }
   }
 
@@ -360,21 +542,13 @@ public class Ivy implements Runnable {
   //
   /////////////////////////////////////////////////////////////////:
 
-  synchronized void addClient(Socket socket,boolean peerCalling) throws IOException {
+  synchronized void addClient(Socket socket,boolean peerCalling,int protocolVersion) throws IOException {
     if (stopped) return;
-    IvyClient client = new IvyClient( this, socket,peerCalling,new Integer(clientSerial++));
+    IvyClient client = new IvyClient( this, socket,peerCalling,new Integer(clientSerial++),protocolVersion);
     clients.put(client.getClientKey(),client);
     traceDebug(getClientNames());
   }
 
-  void callCallback(IvyClient client, Integer key, String[] tab) throws IvyException {
-    IvyMessageListener callback=(IvyMessageListener)callbacks.get(key);
-    if (callback==null){
-      throw new IvyException("(callCallback) Not regexp matching id "+key.intValue());
-    }
-    callback.receive( client, tab);
-  }
-
   private static String[] myTokenize(String s,String separator) {
     int index=0, last=0, length=s.length();
     Vector v = new Vector();
@@ -402,20 +576,6 @@ public class Ivy implements Runnable {
   }
 
 
-  /**
-   * checks the "validity" of a regular expression.
-   */
-  boolean CheckRegexp( String exp ) {
-    boolean regexp_ok = true;
-    if ( exp.startsWith( "^" )&&messages_classes!=null) {
-      regexp_ok=false;
-      for (int i=0 ; i < messages_classes.length;i++) {
-	if (messages_classes[i].equals(exp.substring(1))) return true;
-      }
-    }
-    return regexp_ok;
-  }
-
   /*
    * prevents two clients from connecting to each other at the same time
    * there might still be a lingering bug here, that we could avoid with the
@@ -433,14 +593,14 @@ public class Ivy implements Runnable {
   /*
    * the service socket thread reader main loop
    */
-  public void run() {	
+  public void run() {
     // System.out.println("Ivy service Thread started"); // THREADDEBUG
     Thread thisThread=Thread.currentThread();
     while(thisThread==serverThread){
       try {
         Socket socket = app.accept();
 	if ((thisThread!=serverThread)||stopped) break; // early disconnexion
-	addClient(socket,true); // the peer called me
+	addClient(socket,true,0); // the peer called me TODO I don't know his protocol version
       } catch (InterruptedIOException ie) {
 	if (thisThread!=serverThread) break;
       } catch( IOException e ) {
@@ -459,6 +619,21 @@ public class Ivy implements Runnable {
 
   private void traceDebug(String s){ if (debug) System.out.println("-->ivy<-- "+s); }
 
+  synchronized void registerThread(Thread t) { sendThreads.add(t); }
+  synchronized void unRegisterThread(Thread t) { sendThreads.remove(t); }
+  synchronized Thread getOneThread() {
+    if (sendThreads.size()==0) return null;
+    return (Thread) sendThreads.firstElement();
+  }
+
+  void waitForAll() {
+    Thread t;
+    System.out.println("DEVELOPMENT WAITFORALL sendThreads size : " + sendThreads.size());
+    try { while ((t=getOneThread())!=null) { t.join(); } }
+    catch (InterruptedException ie) { System.out.println("waitForAll Interrupted"); }
+    System.out.println("DEVELOPMENT END WAITFORALL");
+  }
+
   /* a small private method for debbugging purposes */
   private String getClientNames() {
     String s = appName+" clients are: ";
@@ -469,7 +644,7 @@ public class Ivy implements Runnable {
   }
 
   public String domains(String toparse) {
-    String s="broadcasting on ";
+    String s="";
     Ivy.Domain[] d = parseDomains(toparse);
     for (int index=0;index<d.length;index++) {
       s+=d[index].getDomainaddr()+":"+d[index].getPort()+" ";
@@ -495,7 +670,10 @@ public class Ivy implements Runnable {
     Ivy bus = new Ivy("Test Unitaire","TU ready",null);
     try {
       bus.start(null);
-      try { Thread.sleep(2000); } catch (InterruptedException ie) { }
+      System.out.println("waiting 5 seconds for a coucou");
+      System.out.println(((bus.waitForMsg("^coucou",5000))!=null)?"coucou received":"coucou not received");
+      System.out.println("waiting 5 seconds for IvyProbe");
+      System.out.println(((bus.waitForClient("IVYPROBE",5000))!=null)?"Ivyprobe joined the bus":"nobody came");
       bus.stop();
     } catch (IvyException ie) {
       ie.printStackTrace();