load-on-startup problem tomcat
I want to load a class on tomcat startup which will actually initialize variables in other classes.
i have edited the appName/WEB-INF/web.xml as follows
<servlet>
<servlet-name>LoadConfigurations</servlet-name>
<servlet-class>Loader.LoadConfigurations</servlet-class>
<init-param>
<param-name>env</param-name>
<param-value>dev</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
and i have placed my servlet LoadConfiguration in /appName/WEB-INF/classes
how do i check whether the servlet is beig called or not ? because when i try to display the value from initialized class it returns null
java tomcat
asked Sep 16 '11 at 21:19
user949550user949550
12
add a comment |
I want to load a class on tomcat startup which will actually initialize variables in other classes.
i have edited the appName/WEB-INF/web.xml as follows
<servlet>
<servlet-name>LoadConfigurations</servlet-name>
<servlet-class>Loader.LoadConfigurations</servlet-class>
<init-param>
<param-name>env</param-name>
<param-value>dev</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
and i have placed my servlet LoadConfiguration in /appName/WEB-INF/classes
how do i check whether the servlet is beig called or not ? because when i try to display the value from initialized class it returns null
java tomcat
asked Sep 16 '11 at 21:19
user949550user949550
12
try keeping logs or System.out.println("Inside Constuctor") inside constructor and init() method start and end. check if you are getting the logs.
– Jayesh
Jul 29 '13 at 6:29
add a comment |
I want to load a class on tomcat startup which will actually initialize variables in other classes.
i have edited the appName/WEB-INF/web.xml as follows
<servlet>
<servlet-name>LoadConfigurations</servlet-name>
<servlet-class>Loader.LoadConfigurations</servlet-class>
<init-param>
<param-name>env</param-name>
<param-value>dev</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
and i have placed my servlet LoadConfiguration in /appName/WEB-INF/classes
how do i check whether the servlet is beig called or not ? because when i try to display the value from initialized class it returns null
java tomcat
asked Sep 16 '11 at 21:19
user949550user949550
12
I want to load a class on tomcat startup which will actually initialize variables in other classes.
i have edited the appName/WEB-INF/web.xml as follows
<servlet>
<servlet-name>LoadConfigurations</servlet-name>
<servlet-class>Loader.LoadConfigurations</servlet-class>
<init-param>
<param-name>env</param-name>
<param-value>dev</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
and i have placed my servlet LoadConfiguration in /appName/WEB-INF/classes
how do i check whether the servlet is beig called or not ? because when i try to display the value from initialized class it returns null
java tomcat
java tomcat
asked Sep 16 '11 at 21:19
user949550user949550
12
asked Sep 16 '11 at 21:19
user949550user949550
12
asked Sep 16 '11 at 21:19
user949550user949550
12
asked Sep 16 '11 at 21:19
user949550user949550
12
asked Sep 16 '11 at 21:19
user949550user949550
12
12
try keeping logs or System.out.println("Inside Constuctor") inside constructor and init() method start and end. check if you are getting the logs.
– Jayesh
Jul 29 '13 at 6:29
add a comment |
try keeping logs or System.out.println("Inside Constuctor") inside constructor and init() method start and end. check if you are getting the logs.
– Jayesh
Jul 29 '13 at 6:29
try keeping logs or System.out.println("Inside Constuctor") inside constructor and init() method start and end. check if you are getting the logs.
– Jayesh
Jul 29 '13 at 6:29
try keeping logs or System.out.println("Inside Constuctor") inside constructor and init() method start and end. check if you are getting the logs.
– Jayesh
Jul 29 '13 at 6:29
add a comment |
4 Answers
4
active
oldest
votes
There are two problems:
The compiled class needs to go into a folder structure base on the package name. In your case a folder called
LoaderIn order to call the servlet, you need to add a
<ServletMapping>to yourweb.xmlfile
answered Sep 16 '11 at 21:25
nfechnernfechner
15.1k53960
add a comment |
The container should call your servlets init() method when the servlet is initialized. Implement/override that method and try writing something to the log from there.
answered Sep 16 '11 at 21:26
Juha PalomäkiJuha Palomäki
22.5k22938
add a comment |
This is the solution for Tomcat 7.0
Step 1:
Create war file for your webapp/servlets.
If you are using Eclipse, File->Export->Web->WAR file, and save it to a known location.
Step 2:
Find out the home folder for your tomcat.
For that, go to tomcat/apache-tomcat-7.0.41/bin and execute ./startup.sh
This will print out couple of global variable names.
Note down the one for CATALINA_HOME.
Step 3:
Copy the war file from Step 1 in CATALINA_HOME/webapps
Step 4:
Next, Create an xml file in CATALINA_HOME/conf/{Engine}/localhost/MyServlets.xml :
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<Context deployOnStartup="true" docBase="/home/ubuntu/Downloads/apache-tomcat-7.0.42/webapps/" reloadable="true">
<Manager pathname=""/>
</Context>
Change docBase to point to location where you copied the war file in Step 3.
Now, you can go go to tomcat/apache-tomcat-7.0.41/bin and execute ./startup.sh.
Your servlets will be automatically started.
Hope this helps.
answered Jul 29 '13 at 6:22
Priyank DesaiPriyank Desai
2,1341914
add a comment |
This is how I fix it on tomcat 9:
Edit the
conf/context.xmlfile and addreloadable="false"to the<Context>tag.
<Context reloadable="false">
Edit the
conf/server.xmlfile and adddeployOnStartup="false"to the<Host>tag.
<Host appBase="webapps" deployOnStartup="false" …>
answered Nov 16 '18 at 10:29
Unai ViviUnai Vivi
2,37232044
add a comment |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
There are two problems:
The compiled class needs to go into a folder structure base on the package name. In your case a folder called
LoaderIn order to call the servlet, you need to add a
<ServletMapping>to yourweb.xmlfile
answered Sep 16 '11 at 21:25
nfechnernfechner
15.1k53960
add a comment |
There are two problems:
The compiled class needs to go into a folder structure base on the package name. In your case a folder called
LoaderIn order to call the servlet, you need to add a
<ServletMapping>to yourweb.xmlfile
answered Sep 16 '11 at 21:25
nfechnernfechner
15.1k53960
add a comment |
There are two problems:
The compiled class needs to go into a folder structure base on the package name. In your case a folder called
LoaderIn order to call the servlet, you need to add a
<ServletMapping>to yourweb.xmlfile
answered Sep 16 '11 at 21:25
nfechnernfechner
15.1k53960
There are two problems:
The compiled class needs to go into a folder structure base on the package name. In your case a folder called
LoaderIn order to call the servlet, you need to add a
<ServletMapping>to yourweb.xmlfile
answered Sep 16 '11 at 21:25
nfechnernfechner
15.1k53960
answered Sep 16 '11 at 21:25
nfechnernfechner
15.1k53960
answered Sep 16 '11 at 21:25
nfechnernfechner
15.1k53960
answered Sep 16 '11 at 21:25
nfechnernfechner
15.1k53960
15.1k53960
add a comment |
add a comment |
The container should call your servlets init() method when the servlet is initialized. Implement/override that method and try writing something to the log from there.
answered Sep 16 '11 at 21:26
Juha PalomäkiJuha Palomäki
22.5k22938
add a comment |
The container should call your servlets init() method when the servlet is initialized. Implement/override that method and try writing something to the log from there.
answered Sep 16 '11 at 21:26
Juha PalomäkiJuha Palomäki
22.5k22938
add a comment |
The container should call your servlets init() method when the servlet is initialized. Implement/override that method and try writing something to the log from there.
answered Sep 16 '11 at 21:26
Juha PalomäkiJuha Palomäki
22.5k22938
The container should call your servlets init() method when the servlet is initialized. Implement/override that method and try writing something to the log from there.
answered Sep 16 '11 at 21:26
Juha PalomäkiJuha Palomäki
22.5k22938
answered Sep 16 '11 at 21:26
Juha PalomäkiJuha Palomäki
22.5k22938
answered Sep 16 '11 at 21:26
Juha PalomäkiJuha Palomäki
22.5k22938
answered Sep 16 '11 at 21:26
Juha PalomäkiJuha Palomäki
22.5k22938
22.5k22938
add a comment |
add a comment |
This is the solution for Tomcat 7.0
Step 1:
Create war file for your webapp/servlets.
If you are using Eclipse, File->Export->Web->WAR file, and save it to a known location.
Step 2:
Find out the home folder for your tomcat.
For that, go to tomcat/apache-tomcat-7.0.41/bin and execute ./startup.sh
This will print out couple of global variable names.
Note down the one for CATALINA_HOME.
Step 3:
Copy the war file from Step 1 in CATALINA_HOME/webapps
Step 4:
Next, Create an xml file in CATALINA_HOME/conf/{Engine}/localhost/MyServlets.xml :
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<Context deployOnStartup="true" docBase="/home/ubuntu/Downloads/apache-tomcat-7.0.42/webapps/" reloadable="true">
<Manager pathname=""/>
</Context>
Change docBase to point to location where you copied the war file in Step 3.
Now, you can go go to tomcat/apache-tomcat-7.0.41/bin and execute ./startup.sh.
Your servlets will be automatically started.
Hope this helps.
answered Jul 29 '13 at 6:22
Priyank DesaiPriyank Desai
2,1341914
add a comment |
This is the solution for Tomcat 7.0
Step 1:
Create war file for your webapp/servlets.
If you are using Eclipse, File->Export->Web->WAR file, and save it to a known location.
Step 2:
Find out the home folder for your tomcat.
For that, go to tomcat/apache-tomcat-7.0.41/bin and execute ./startup.sh
This will print out couple of global variable names.
Note down the one for CATALINA_HOME.
Step 3:
Copy the war file from Step 1 in CATALINA_HOME/webapps
Step 4:
Next, Create an xml file in CATALINA_HOME/conf/{Engine}/localhost/MyServlets.xml :
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<Context deployOnStartup="true" docBase="/home/ubuntu/Downloads/apache-tomcat-7.0.42/webapps/" reloadable="true">
<Manager pathname=""/>
</Context>
Change docBase to point to location where you copied the war file in Step 3.
Now, you can go go to tomcat/apache-tomcat-7.0.41/bin and execute ./startup.sh.
Your servlets will be automatically started.
Hope this helps.
answered Jul 29 '13 at 6:22
Priyank DesaiPriyank Desai
2,1341914
add a comment |
This is the solution for Tomcat 7.0
Step 1:
Create war file for your webapp/servlets.
If you are using Eclipse, File->Export->Web->WAR file, and save it to a known location.
Step 2:
Find out the home folder for your tomcat.
For that, go to tomcat/apache-tomcat-7.0.41/bin and execute ./startup.sh
This will print out couple of global variable names.
Note down the one for CATALINA_HOME.
Step 3:
Copy the war file from Step 1 in CATALINA_HOME/webapps
Step 4:
Next, Create an xml file in CATALINA_HOME/conf/{Engine}/localhost/MyServlets.xml :
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<Context deployOnStartup="true" docBase="/home/ubuntu/Downloads/apache-tomcat-7.0.42/webapps/" reloadable="true">
<Manager pathname=""/>
</Context>
Change docBase to point to location where you copied the war file in Step 3.
Now, you can go go to tomcat/apache-tomcat-7.0.41/bin and execute ./startup.sh.
Your servlets will be automatically started.
Hope this helps.
answered Jul 29 '13 at 6:22
Priyank DesaiPriyank Desai
2,1341914
This is the solution for Tomcat 7.0
Step 1:
Create war file for your webapp/servlets.
If you are using Eclipse, File->Export->Web->WAR file, and save it to a known location.
Step 2:
Find out the home folder for your tomcat.
For that, go to tomcat/apache-tomcat-7.0.41/bin and execute ./startup.sh
This will print out couple of global variable names.
Note down the one for CATALINA_HOME.
Step 3:
Copy the war file from Step 1 in CATALINA_HOME/webapps
Step 4:
Next, Create an xml file in CATALINA_HOME/conf/{Engine}/localhost/MyServlets.xml :
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<Context deployOnStartup="true" docBase="/home/ubuntu/Downloads/apache-tomcat-7.0.42/webapps/" reloadable="true">
<Manager pathname=""/>
</Context>
Change docBase to point to location where you copied the war file in Step 3.
Now, you can go go to tomcat/apache-tomcat-7.0.41/bin and execute ./startup.sh.
Your servlets will be automatically started.
Hope this helps.
answered Jul 29 '13 at 6:22
Priyank DesaiPriyank Desai
2,1341914
answered Jul 29 '13 at 6:22
Priyank DesaiPriyank Desai
2,1341914
answered Jul 29 '13 at 6:22
Priyank DesaiPriyank Desai
2,1341914
answered Jul 29 '13 at 6:22
Priyank DesaiPriyank Desai
2,1341914
2,1341914
add a comment |
add a comment |
This is how I fix it on tomcat 9:
Edit the
conf/context.xmlfile and addreloadable="false"to the<Context>tag.
<Context reloadable="false">
Edit the
conf/server.xmlfile and adddeployOnStartup="false"to the<Host>tag.
<Host appBase="webapps" deployOnStartup="false" …>
answered Nov 16 '18 at 10:29
Unai ViviUnai Vivi
2,37232044
add a comment |
This is how I fix it on tomcat 9:
Edit the
conf/context.xmlfile and addreloadable="false"to the<Context>tag.
<Context reloadable="false">
Edit the
conf/server.xmlfile and adddeployOnStartup="false"to the<Host>tag.
<Host appBase="webapps" deployOnStartup="false" …>
answered Nov 16 '18 at 10:29
Unai ViviUnai Vivi
2,37232044
add a comment |
This is how I fix it on tomcat 9:
Edit the
conf/context.xmlfile and addreloadable="false"to the<Context>tag.
<Context reloadable="false">
Edit the
conf/server.xmlfile and adddeployOnStartup="false"to the<Host>tag.
<Host appBase="webapps" deployOnStartup="false" …>
answered Nov 16 '18 at 10:29
Unai ViviUnai Vivi
2,37232044
This is how I fix it on tomcat 9:
Edit the
conf/context.xmlfile and addreloadable="false"to the<Context>tag.
<Context reloadable="false">
Edit the
conf/server.xmlfile and adddeployOnStartup="false"to the<Host>tag.
<Host appBase="webapps" deployOnStartup="false" …>
answered Nov 16 '18 at 10:29
Unai ViviUnai Vivi
2,37232044
edited Nov 16 '18 at 11:35
answered Nov 16 '18 at 10:29
Unai ViviUnai Vivi
2,37232044
answered Nov 16 '18 at 10:29
Unai ViviUnai Vivi
2,37232044
answered Nov 16 '18 at 10:29
Unai ViviUnai Vivi
2,37232044
2,37232044
add a comment |
add a comment |
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try keeping logs or System.out.println("Inside Constuctor") inside constructor and init() method start and end. check if you are getting the logs.
– Jayesh
Jul 29 '13 at 6:29