What's the most concise / best way to write this java code?
<p>I'm writing a simple distributed java rmi application and I have a bunch of methods that each need to iterate through a map of client interfaces in order to call various other methods on those interfaces, like so:</p>

<pre><code>public void methodX (arg1, arg2) {
  Iterator&lt;String&gt; itr = clients.keySet().iterator;
  while (itr.hasNext()) {
    String name = itr.next();
    if (!"mod".equals(name)) {
      try {
        clients.get(name).methodXX(arg1, arg2);
      } catch(RemoteException ex) {
        // do something
      }
    }
  }
}

public void methodY (arg1, arg2, arg3) {
  Iterator&lt;String&gt; itr = clients.keySet().iterator;
  while (itr.hasNext()) {
    String name = itr.next();
    if (!"mod".equals(name)) {
      try {
        clients.get(name).methodYY(arg1, arg2, arg3);
      } catch(RemoteException ex) {
        // do something
      }
    }
  }
}
</code></pre>

<p>Now I modified these so that instead they each call a single method doAll by passing a new argument called MESSAGE_TYPE, like so:</p>

<pre><code>public void methodX (arg1, arg2) {
  doAll(MESSAGE_TYPE.METHODX, arg1, arg2, null);
}

public void methodY (arg1, arg2, arg3) {
  doAll(MESSAGE_TYPE_METHODY, arg1, arg2, arg3);
}
</code></pre>

<p>And the doAll method:</p>

<pre><code>public void doAll(msg_type, arg1, arg2, arg3) {
 Iterator&lt;String&gt; itr = clients.keySet().iterator;
  while (itr.hasNext()) {
    String name = itr.next();
    if (!"mod".equals(name)) {
      try {
        switch(msg_type) {
          case METHODX:
            clients.get(name).methodXX(arg1, arg2);
            break;
          case METHODY:
            clients.get(name).methodYY(arg1, arg2, arg3);
            break;
        }
      } catch(RemoteException ex) {
        // do something
      }
    }
  }
}
</code></pre>

<p>Now there are many more methods like this, and so my doAll method needs to take a bunch of args and each methodXX that calls it pass a bunch of nulls to it.</p>

<p>Can I rewrite this so it's more concise? If so, can you provide an example?</p>
