php-java-bridge-users

[Php-java-bridge-users] Java 1.5 varargs, NoSuchMethodException

[<php...@li...>]

Hi,

I'm having some problems with a Java 1.5 feature.
I have a java class with a function like:

public void doSomething(String...) {
...
}

DeclaredMethods (according to getDeclaredMethods):
- doSomething([Ljava.lang.String;)
- doSomething(java.util.List)

I've tried to pass a single string the following ways:
- java.lang.reflect.Array with java.lang.String
- java.util.Arrays->asList with array('...')
- ArrayList, how do I cast this to a java.util.List ?

I keep getting a NoSuchMethodException.
Any suggestions?


Setup:
- Apache 2.2.4
- PHP 5.2.3
- Tomcat 5.5.17
- Java Bridge 4.2.2

Re: [Php-java-bridge-users] Java 1.5 varargs, NoSuchMethodException

[<php...@li...>]

I think you could/should use an array(). For example the code below displays 12:

--- varargs.php ---

<?php require_once("http://localhost:9092/JavaBridge/java/Java.inc");

java_require("varargs.jar");
$varargs = new java("Varargs");

$t1 = new java('Varargs$Test', 1);
$t2 = new java('Varargs$Test', 2);

echo $varargs->varargs(array($t1, $t2));
?>

--- Varargs.java ---


public class Varargs {
    public static class Test {
 public int i;
 public Test (int i) {
     this.i = i;
 }
 public String toString() {
     return String.valueOf(i);
 }
    }
    public static String varargs(Test ...tests) {
 StringBuffer buf = new StringBuffer();
 for (Test test : tests) {
     buf.append(test);
        }
 return buf.toString();
    }
    public static void main(String[] args) {
 System.out.println(varargs(new Test(1), new Test(2)));
    }
}

Peter


       
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[Php-java-bridge-users] PHP and Java unable to reconnect if connection lost or one side restarted.

[<php...@li...>]

Whenever the PHP/JavaBridge on Apache has lost connection to Tomcat,
then that was it!
If - for example - Tomcat has been brought down and restarted, then
the next time I want to call some java-code I get the following
notice:
--------------------------------------------------------------
Notice: fwrite() [function.fwrite]: send of 117 bytes failed with
errno=3D10054 An existing connection was forcibly closed by the remote
host. in C:\Program Files\xampp\htdocs\test\Java.inc on line 740
protocol error: , Invalid document end at col 8. Check the back end
log for details.
Notice: fwrite() [function.fwrite]: send of 11 bytes failed with
errno=3D10054 An existing connection was forcibly closed by the remote
host. in C:\Program Files\xampp\htdocs\test\Java.inc on line 746
--------------------------------------------------------------

In other words, if one side goes down, one has to bring down the other
as well and has to restart both. Only then they will "find" each other
again. Couldn't the bridge try to reconnect? I find it a bit tedious
and also not very robust, that I always have to bring down both sides
in lock-step and can't simply let one run all the time.

Michael

Re: [Php-java-bridge-users] PHP and Java unable to reconnect if connection lost or one side restarted.

[<php...@li...>]

Hi,

according to http://msdn2.microsoft.com/en-us/library/ms740668.aspx the winsock error #10054
means:

Connection reset by peer.
    An existing connection was forcibly closed by the remote host. This normally results if the
peer application on the remote host is suddenly stopped, the host is rebooted, the host or remote
network interface is disabled, or the remote host uses a hard close (see setsockopt for more
information on the SO_LINGER option on the remote socket). This error may also result if a
connection was broken due to keep-alive activity detecting a failure while one or more operations
are in progress. Operations that were in progress fail with WSAENETRESET. Subsequent operations
fail with WSAECONNRESET. 

Isn't it possible to shut down the back end? How do you stop tomcat?

However, this is not a problem with the PHP/Java Bridge. The bridge uses pfsockopen() to create a
persistent connection to the back end. PHP can and should detect if the back end has been
restarted or not.


Regards,
Jost Boekemeier



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Re: [Php-java-bridge-users] Java 1.5 varargs, NoSuchMethodException

[<php...@li...>]

Hi,

> DeclaredMethods (according to getDeclaredMethods):
> - doSomething([Ljava.lang.String;)
> - doSomething(java.util.List)

you could use java_inspect($object), which also prints the methods. :)


> I've tried to pass a single string the following ways:
> - java.lang.reflect.Array with java.lang.String
> - java.util.Arrays->asList with array('...')
> - ArrayList, how do I cast this to a java.util.List ?

All wrong. :) You need to pass a typed array.


> I keep getting a NoSuchMethodException.

Just pass a Java array or let the PHP/Java Bridge coerce the argument. For example:

  $varargs = array("1", "2", "3"); 

or 

  $varargs = array (new Java("java.lang.String", "1"), new Java("java.lang.String", "2"), ...);

should work.


Regards,
Jost Boekemeier



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