Can I call My thread class in JSP/Java Bean??
Hi All,
Can I call thread classes in my JSP or Java Bean classes??
The reason why I am asking is, I have a situation in which if a person
registers as a consumer, then a mail shud be sent to providers that
who matches the consumers requirements
There is a possinbilty of sending more than 100 mails at an instance.
So after successful registration by consumer, I don't want to put the
consumer in wait mode, So I have created a thread class and I am
trying to send the mail in the thread class
But the problem is although I called thread.start method, my run
method is not invoking.
I thought there could be a problem with my code and tested with
standalone java class. In standalone class I am able to send the mail.
So, I don't know why tomcat is rejecting the My thread execution.
Any Ideas??
here is my code
// calling the thread
jiya.general.results.MailThread mailThread =new
jiya.general.results.MailThread();
mailThread.start();
//sending the mail
private void sendMail() throws JiyaException {
JiyaMailComponent jmc=new JiyaMailComponent();
jmc.setServer(192.12.0.91);
jmc.setUser([EMAIL PROTECTED]);
jmc.setPassword(a);
jmc.setFromAddress([EMAIL PROTECTED]);
jmc.setContentType(text/plain);
jmc.setTo([EMAIL PROTECTED]);
jmc.setSubject(Some Subject);
jmc.setBody(test body);
jmc.send();
}
//this is inner class of My main class
class MailThread extends Thread implements Runnable {
public MailThread()
{
log(Entered here at mail thread execution); // here I am to
see the log info in log file
}
public void run() {
try{
sendMail(); //not coming to this stage
}
catch(Exception ex) {
throw new RuntimeException(ex);
}
}
}
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Re: load on startup
private static final SingletonObj singleton;
public SingletonObj ()
{
super ();
singleton = this;
}
public synchronized SingletonObj getSingleton ()
{
if ( singleton == null )
{
new SingletonObj();
}
return singleton;
}
On Fri, 2005-08-05 at 20:11 -0700, Ming Han wrote:
You can use Singleton pattern, but care must be taken.
For example
if ( singleton == null )
{
singleton = new SingletonObj();
}
There might be a case where few thread running concurrently on the null
checking, then multiple singleton object will be created more than one.
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Re: load on startup
{
private static final SingletonObj singleton;
// optional - use if you want the initialization to occur as class load
time
// Otherwise, the initialization will occur at first call to
getSingleton();
// static initialization at load time
static {
getSingelton ()/
}
private SingletonObj ()
{
super ();
singleton = this;
}
public static synchronized SingletonObj getSingleton ()
{
if ( singleton == null )
{
new SingletonObj();
}
return singleton;
}
}
On Fri, 2005-08-05 at 20:11 -0700, Ming Han wrote:
You can use Singleton pattern, but care must be taken.
For example
if ( singleton == null )
{
singleton = new SingletonObj();
}
There might be a case where few thread running concurrently on the null
checking, then multiple singleton object will be created more than one.
__
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Re: Can I call My thread class in JSP/Java Bean??
You may be getting an error in your thread. You
should not throw exceptions out of the run method.
You should always log and update some table or static
collection so you can do something later if needed,
but throwing errors from threads is never a good idea
as you can hang up some stuff at times depending on
your JVM and you'll not know what is happening in any
case. Use the standard java logging API, servlet
loggers, or log4j.
Wade
--- IndianAtTech [EMAIL PROTECTED] wrote:
Hi All,
Can I call thread classes in my JSP or Java Bean
classes??
The reason why I am asking is, I have a situation in
which if a person
registers as a consumer, then a mail shud be sent to
providers that
who matches the consumers requirements
There is a possinbilty of sending more than 100
mails at an instance.
So after successful registration by consumer, I
don't want to put the
consumer in wait mode, So I have created a thread
class and I am
trying to send the mail in the thread class
But the problem is although I called thread.start
method, my run
method is not invoking.
I thought there could be a problem with my code and
tested with
standalone java class. In standalone class I am able
to send the mail.
So, I don't know why tomcat is rejecting the My
thread execution.
Any Ideas??
here is my code
// calling the thread
jiya.general.results.MailThread mailThread =new
jiya.general.results.MailThread();
mailThread.start();
//sending the mail
private void sendMail() throws JiyaException {
JiyaMailComponent jmc=new
JiyaMailComponent();
jmc.setServer(192.12.0.91);
jmc.setUser([EMAIL PROTECTED]);
jmc.setPassword(a);
jmc.setFromAddress([EMAIL PROTECTED]);
jmc.setContentType(text/plain);
jmc.setTo([EMAIL PROTECTED]);
jmc.setSubject(Some Subject);
jmc.setBody(test body);
jmc.send();
}
//this is inner class of My main class
class MailThread extends Thread implements Runnable
{
public MailThread()
{
log(Entered here at mail thread
execution); // here I am to
see the log info in log file
}
public void run() {
try{
sendMail(); //not coming to this stage
}
catch(Exception ex) {
throw new RuntimeException(ex);
}
}
}
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Re: Can I call My thread class in JSP/Java Bean??
Also , if all else fails make sure you can do what the
thread is doing from the JSP to make sure you're
emails are actually getting sent. I have had some
funny issues sometimes with code in a servlet/JSP vs.
standalone. Break it down to the least common
denominator firstsimplify then you will know if
it's really the thread or not.
Wade
--- Wade Chandler [EMAIL PROTECTED]
wrote:
You may be getting an error in your thread. You
should not throw exceptions out of the run method.
You should always log and update some table or
static
collection so you can do something later if needed,
but throwing errors from threads is never a good
idea
as you can hang up some stuff at times depending on
your JVM and you'll not know what is happening in
any
case. Use the standard java logging API, servlet
loggers, or log4j.
Wade
--- IndianAtTech [EMAIL PROTECTED] wrote:
Hi All,
Can I call thread classes in my JSP or Java Bean
classes??
The reason why I am asking is, I have a situation
in
which if a person
registers as a consumer, then a mail shud be sent
to
providers that
who matches the consumers requirements
There is a possinbilty of sending more than 100
mails at an instance.
So after successful registration by consumer, I
don't want to put the
consumer in wait mode, So I have created a thread
class and I am
trying to send the mail in the thread class
But the problem is although I called thread.start
method, my run
method is not invoking.
I thought there could be a problem with my code
and
tested with
standalone java class. In standalone class I am
able
to send the mail.
So, I don't know why tomcat is rejecting the My
thread execution.
Any Ideas??
here is my code
// calling the thread
jiya.general.results.MailThread mailThread =new
jiya.general.results.MailThread();
mailThread.start();
//sending the mail
private void sendMail() throws JiyaException {
JiyaMailComponent jmc=new
JiyaMailComponent();
jmc.setServer(192.12.0.91);
jmc.setUser([EMAIL PROTECTED]);
jmc.setPassword(a);
jmc.setFromAddress([EMAIL PROTECTED]);
jmc.setContentType(text/plain);
jmc.setTo([EMAIL PROTECTED]);
jmc.setSubject(Some Subject);
jmc.setBody(test body);
jmc.send();
}
//this is inner class of My main class
class MailThread extends Thread implements
Runnable
{
public MailThread()
{
log(Entered here at mail thread
execution); // here I am to
see the log info in log file
}
public void run() {
try{
sendMail(); //not coming to this stage
}
catch(Exception ex) {
throw new RuntimeException(ex);
}
}
}
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To unsubscribe, e-mail:
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Re: load on startup
Improved version without sync locking:
class SingletonObj
{
private static SingletonObj instance;
static
{
instance=new SingletonObj();
}
private SingletonObj()
{
}
public static SingletonObj getInstance() // without sync !
{
return instance;
}
}
El sáb, 06-08-2005 a las 09:14 -0500, David Johnson escribió:
{
private static final SingletonObj singleton;
// optional - use if you want the initialization to occur as class load
time
// Otherwise, the initialization will occur at first call to
getSingleton();
// static initialization at load time
static {
getSingelton ()/
}
private SingletonObj ()
{
super ();
singleton = this;
}
public static synchronized SingletonObj getSingleton ()
{
if ( singleton == null )
{
new SingletonObj();
}
return singleton;
}
}
On Fri, 2005-08-05 at 20:11 -0700, Ming Han wrote:
You can use Singleton pattern, but care must be taken.
For example
if ( singleton == null )
{
singleton = new SingletonObj();
}
There might be a case where few thread running concurrently on the null
checking, then multiple singleton object will be created more than one.
__
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Re: loading resources from the servlet.
just place your .properties file under web-inf/classes which is alway guaranteed to be in your classpath... - so u are still outside of any packages... Anoop On 8/5/05, Maciej Stoszko [EMAIL PROTECTED] wrote: Thx Jon, I had already looked at the wiki entry you graciously pointed me to. I need a bit more. The class X, I mentioned, is already packaged and I am looking for a way of using it without changing it (unless there is no other way.) It makes the assumption that the ../data folder is in the classpath. In eclipse or via ant I can easily set my classpath 'right', is there a way to do it for the webapp inside Tomcat? Regards, maciek PS. What does HTH stand for? -Original Message- From: Jon Wingfield [mailto:[EMAIL PROTECTED] Sent: Friday, August 05, 2005 12:28 PM To: Tomcat Users List Subject: Re: loading resources from the servlet. http://wiki.apache.org/jakarta-tomcat/HowTo#head-45c3314139cb900ddd43dde2ff6 71532e6e844bc HTH, Jon Maciej Stoszko wrote: I have a class X which needs to load a .properties file. Here is a code snippet: ClassLoader cl = this.getClass().getClassLoader(); InputStream stream = cl.getResourceAsStream(/data/x.properties); It works just fine from my JUnit test for X. Now, I would like this class to be called from the servlet, which would run inside Tomcat 5.5.9. The only way to get that to work is to place my x.properties file inside the package the class X lives in. Well, I'd rather not to mix properties with classfiles. Another way, I can load that file, is to use servlets getServletContext() method. However, that would mean I need to pass the InputStream from the servlets to my class X. Well, I'd rather not to change X to use its caller to get X's properties file. I guess, what I need to do is to add the WEB-INF or ROOT dir of my webapp to the classpath, so the classloader can find it. Or is there some other way of accomplishing it? I think I am missing something fundamental ... cos that doesn't seem to be too strange of a requirement ... Any ideas? Thanks, maciek - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Thanks and best regards, Anoop - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: anonymising Tomcat
Take a look at ./org/apache/catalina/util/ServerInfo.properties in CATALINA_HOME/server/lib/catalina.jar. It contains: server.info=Apache Tomcat/5.5.10 server.number=5.5.10.0 You can put different values in there and deploy the new properties file in CATALINA_HOME/server/classes/org/apache/catalina/util/ServerInfo.properties As far as I know, there are no negative side effects. Have fun Rainer Is it possible to configure Tomcat (5.5.9) so that a moderately able hacker couldn't figure out what is serving up our web apps? Paul Singleton -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.338 / Virus Database: 267.10.0/63 - Release Date: 3/Aug/2005 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat application won't start with MySQL Connection Pooling
From: James Adams [mailto:[EMAIL PROTECTED] Subject: RE: Tomcat application won't start with MySQL Connection Pooling I have now created a context.xml according to the example in the Tomcat 5.5 documentation and this time I've placed it my application's META-INF directory in the WAR --- META-INF/context.xml - Context path=/ioifocus Please note the following for the path attribute in the Tomcat 5.5 doc for Context: The value of this field must not be set except when statically defining a Context in server.xml, as it will be infered [sic] from the filenames used for either the .xml context file or the docBase. Also, examine the $CATALINA_HOME/conf/[enginename]/[hostname]/ directory (usually conf/Catalina/localhost/), and remove any .xml files that might have been automatically created previously for your application and restart Tomcat. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: How to turn off perssitent sessions in Tomcat 4.1?
Hmm, I assume you have read the documentation on this: http://jakarta.apache.org/tomcat/tomcat-4.1-doc/config/manager.html If so, have you tried leaving the manager element out? HTH - Richard -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, August 05, 2005 3:26 AM To: tomcat-user@jakarta.apache.org Subject: RE: How to turn off perssitent sessions in Tomcat 4.1? Can any one help me out in this issue? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Thursday, August 04, 2005 11:27 AM To: tomcat-user@jakarta.apache.org Subject: RE: How to turn off perssitent sessions in Tomcat 4.1? I am waiting for a good response. Can any body help me out in this? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 03, 2005 6:01 PM To: tomcat-user@jakarta.apache.org Subject: RE: How to turn off perssitent sessions in Tomcat 4.1? Hi Edgar, Thanks for the reply. But I am using Tomcat 4.1.29 and I tried this option (I mean, pathname= in Manager element of server.xml) in Tomcat 4.1.29, which is not successful. Is there any way to turn off session persistence in Tomcat 4.1 itself or I need to upgrade to Tomcat 5.0. In order to avoid the exception we have to make all the objects that is put in session to be serializable, right no?. I am using struts framework. So by default all form beans are serializable and all primitive data types are also serializable. Why Tomcat complains about CoyoteRequestFacade is not serializable? Please clarify my doubts. Advance thanks to all of u !!! -Original Message- From: Edgar Alves [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 03, 2005 5:00 PM To: Tomcat Users List Subject: Re: How to turn off perssitent sessions in Tomcat 4.1? Hi, On Tomcat 5.5 you can turn persistent session loading off by setting the SessionManager pathname attribute to . Hope that helps. -- Edgar Alves [EMAIL PROTECTED] wrote: Hi, I am using Apache+Tomcat 4.1.29 for running my application. When I am restarting Tomcat I am getting persistent session loading exception like this: 2004-03-11 13:52:18 StandardManager[] IOException while loading persisted sessions: java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.apache.coyote.tomcat4.CoyoteRequestFacade java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.apache.coyote.tomcat4.CoyoteRequestFacade at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1278) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845 ) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:164 6 ) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845 ) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:164 6 ) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324) at org.apache.catalina.session.StandardSession.readObject(StandardSession. j ava:1369) I am not using clustering. I want to turn off the session persistence in Tomcat 4.1.29? I have tried so many options with StandardManager in server.xml. But I was not successful. Please help me out in this? Regards AK - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Confidentiality Notice The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain confidential or privileged information. If you are not the intended recipient, please notify the sender at Wipro or [EMAIL PROTECTED] immediately and destroy all copies of this message and any attachments. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Confidentiality Notice The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain confidential or privileged information. If you are not the intended recipient, please notify the sender at Wipro or [EMAIL PROTECTED] immediately and destroy all copies of this message and any attachments. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail:
Re: load on startup
instance needs to be final, or it may be changed by some tricks that
break encapsulation.
On Sat, 2005-08-06 at 15:59 -0400, Mauricio Nuñez wrote:
Improved version without sync locking:
class SingletonObj
{
private static SingletonObj instance;
static
{
instance=new SingletonObj();
}
private SingletonObj()
{
}
public static SingletonObj getInstance() // without sync !
{
return instance;
}
}
El sáb, 06-08-2005 a las 09:14 -0500, David Johnson escribió:
{
private static final SingletonObj singleton;
// optional - use if you want the initialization to occur as class load
time
// Otherwise, the initialization will occur at first call to
getSingleton();
// static initialization at load time
static {
getSingelton ()/
}
private SingletonObj ()
{
super ();
singleton = this;
}
public static synchronized SingletonObj getSingleton ()
{
if ( singleton == null )
{
new SingletonObj();
}
return singleton;
}
}
On Fri, 2005-08-05 at 20:11 -0700, Ming Han wrote:
You can use Singleton pattern, but care must be taken.
For example
if ( singleton == null )
{
singleton = new SingletonObj();
}
There might be a case where few thread running concurrently on the null
checking, then multiple singleton object will be created more than one.
__
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