Java

getting this in osx?

java.io.IOException: Cannot run program " ": error=2, No such file or directory

your code looks like this?

ProcessBuilder processBuilder = new ProcessBuilder(command);
final Process process = processBuilder.start();
InputStream is = process.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line;
while ((line = br.readLine()) != null) {
builder.append(line).append(newLine);
}


command will need to be a String[] separated out.

so for example:


String[]{"ls", "-lrt"}


hope this helps.

Recently I needed a program to move the mail from one mail box to another. I wrote the following program to accomplish this.. Hopefully someone will find it useful. I whipped this program together pretty quickly, so it's a little raw. But it'll log any error mesages to standard out.


import javax.mail.*;
import javax.mail.internet.*;
import java.util.Properties;

public class MigrateMail{

public static void main(String[] args)throws Exception{

String host = "";
String username = "";
String password = "";
String migrationAddress;

Properties props = new Properties();
props.put("smtp.server.com", host);

Session session = Session.getDefaultInstance(props, null);
Store store = session.getStore("imap");
store.connect(host, username, password);

Folder folder = store.getFolder("INBOX");
folder.open(Folder.READ_ONLY);

Message messages[] = folder.getMessages();

for (int i=0; i < messages.length; i++) {
try{
forward(session, messages[i], i, migrationAddress);
Thread.sleep(60000); // sleep 1 minute between emails.
}catch(Exception e){
System.out.println("Mail Failed for " + i + ", " + messages[i].getFrom()[0] + ", subject = " + messages[i].getSubject());
}
}
folder.close(false);
store.close();

}

public static void forward(Session session, Message oldMessage, int i, String migrationAddress)throws
Exception{
Message message = new MimeMessage(session);
message.setSentDate(oldMessage.getSentDate());
message.addFrom(oldMessage.getFrom());
message.addRecipient(Message.RecipientType.TO, new InternetAddress(migrationAddress));
message.setSubject(oldMessage.getSubject());
message.setContent(oldMessage.getContent(), oldMessage.getContentType());

Transport.send(message);
System.out.println("Message Send. " + i);

}
}


Here's the compile command

javac -cp "mail.jar:activation.jar:." MigrateMail.java

Here's the run command

java -cp "mail.jar:activation.jar:." MigrateMail >> mail.migration.txt

then i command z'd it w/ a bg.

getting these errors:

[Thu Aug 13 16:18:34 2009] [error] ajp_read_header: ajp_ilink_receive failed
[Thu Aug 13 16:18:34 2009] [error] (120006)APR does not understand this error code: proxy: read response failed from (null) (localhost)
[Thu Aug 13 16:19:04 2009] [error] (70007)The timeout specified has expired: ajp_ilink_receive() can't receive header


I was. I fixed these by adding

maxThreads="256"

to the ajp connector:

< Connector port="8009" address="${jboss.bind.address}" protocol="AJP/1.3"
emptySessionPath="true" enableLookups="false" redirectPort="8443"
maxThreads="256"
/ >


Took me a long time to figure this out. the 256 number was derived by what the MaxClients had set in the httpd.conf.

Enjoy.

So I stumbled on this article Optimizing ArrayList.removeAll. Hope others can benefit from it..

I must say that the java.util.Arrays is a nice little utility class that I only occasionally use. Today, I found a really good use for the fill(char[], char) method.

I had a BufferedReader that I was looping through and calling readLine() and then subsequently calling String.getChars(int, int, char[], int). Inside the while loop the char[] buffer wasn't getting cleared out. So I was getting occasional dirty getChars() and bleeding characters. So I circumvented this by at the beginning of the loop adding a Arrays.fill(buffer, '\u0000'). This fills & resets the array with null characters. So the next time I'm ensured that the characters weren't bleeding through the previous iteration of the loop..

So today I had to figure out how many lines of source code were in all of our production software... So in the past I've used tools incorporated in MyEclipse...

We're using RAD7, and I couldn't think of any good way to do this... So I asked a co-worker.. and what he said was brilliant. Brilliant enough I thought it warranted a blog post.

So in any eclipse ide derivative do:

1) Search -> File
2) File name patterns: *.java
3) Containing Text: \n
4) Check regular expressions checkbox
5) Create a working set that is appropriate

Click Search

this will come back with search results of every line of code in your application.

BRILLIANT!!

New Article on Java Sun Homepage. An article to update his incredibly successful book on java.

It's okay to geek out now... worth-while video to watch. Espeically if you're a java geek.

So I've been struggling to figure out why I couldn't load xml resources when i've done it a thousand times before.. Well I found the problem ... my resource was in a different jar file that was part of my ear package... it looks like ejb3 timers have a different classloader than it does for regular ejb stateless session beans... I was able to load the resource from a SLSB but not from the timer....

I just wasted like 15 hours for being a dumbass

Apple.. I'm very disappointed with you.. I know you're a secretive company and all... And won't usually give product announcements before they ship... So I'm telling you now... I'm wanting Java 6 on Leopard. Why didn't you include this in Leopard? I don't even see the preview release on your java page anymore. I know it was there cause I have downloaded it before... I think all of us OS X java developer are eagerly awaiting it...

Please Hurry And Resolve This Matter! A New Laptop Purchase Is Being Looked At.... but Not UNTIL Java 6 is on Leopard.. See what you've done... You've turned me into a whiny little Bitch ;(

Here's a post from the onJava community.

Fake Steve's Take

The Server Side OSX Leopard & Java

One more article found

The war between Apple & Developers

The Future Of Java On Macs

Java Word of the Day: 13949712720901ForOSX

Vote for Java 6 on Leopard

James Gosling on OSX & Solaris for Java 6

Anybody have ideas why this doesn't work? I got myfaces 1.1.5 JSF implementation with tomahawk.

Here's a sniplet from the facelet define

< ! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
< h tml xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:t="http://myfaces.apache.org/tomahawk"
xmlns:a4j="https://ajax4jsf.dev.java.net/ajax"
xmlns:s="http://jboss.com/products/seam/taglib"
>
< b ody>
< u i :define name="content">
< t :dojoInitializer require="dojo.widget.Editor" />
< f :view>
< h :form id="topicforum">
< h3>Post An Interesting Topic
< p>
Topic Title < h :inputText id="title" value="#{topicform.saveable.title}" / >
< / p>
< p>
Message
< / p>
< p>
< h :inputTextarea id="editarea2" styleClass="dojo-Editor" value="#{topicform.saveable.topic">
< / h :inputTextarea>
< / p>

Here's the error message

com.sun.facelets.tag.TagException: /post/topics/index.xhtml @33,53 Tag Library supports namespace: http://myfaces.apache.org/tomahawk, but no tag was defined for name: dojoInitializer

So anybody have thoughts on why I'm getting a namespace error...

After an exciting JavaOne for all of us, and a great jsr 310 BOF session, I thought I'd type of some thoughts that I have, and things I'd like to see happen in this space from an application developer department.

The day after the BOF, I just happen to sit with the Sun JDK date/calendar group during lunch, and we got to talk about the exciting things happening in this space...

I'm sure these discussions and thoughts have already occurred.. but in the off chance that they haven't I'd like to share them....

I'll be attending JavaOne this year in SF. Should be a good time... hopefully I'll have many pictures, notes, and coverage from the event... (Assuming I have time to post this information)...

Is anybody else attending?

well over the last couple nights i think i've isolated where the problem is.... back in late june/early july i installed the ejb3 trails tutorial from jboss... and ever since then my local development box hasn't been working right... i didn't realize this until this last weekend because the project i was working on was only a WAR... but i went back and tried to run a couple ears and nothing worked... it was all saying the same thing about beans.jar not found etc...

well after cracking open the jboss source and digging deep into the guts of it.... i think i've isolated the problem code...


InputStream in = di.localCl.getResourceAsStream("META-INF/application.xml");

grabs the application.xml from the local classloader... and somehow i have application.xmls in my utility javalib classpath.... so after i get the input stream

i get this pushed to the StringBuffer....

20:37:53,456 WARN [EARDeployer] input stream =
< application xmlns="http://java.sun.com/xml/ns/j2ee" version="1.4"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com /xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/application_1_4.xsd">
EJB3Trail< / display-name>
J2EE Made Easy Trail Map< / description>


beans.jar< / ejb>
< / module>



web.war< / web-uri>
< context-root>EJB3Trail< / context-root>
< / web>
< / module>

< / application>



So hopefully after removing these at out my javalib classpath... it'll correct the problem.. i'm posting this before i try it cause i've been searching google & yahoo for a week trying to find similar info.. and could find anything.... so here's my first analysis in case somebody is having the same problems....


peace

Okay after dealing with this for a couple hours.. I'm wondering if anybody has had this problem before...