web.xml - context-param not in order
Hi; When I retrieve the param-name/param-value pairs from web.xml via: Enumeration en = pageContext.getServletContext().getInitParameterNames(); It does not return them in the order they appear in web.xml. Is random order just part of the API definition? thanks - dave
Re: web.xml - context-param not in order
Hi; You are not guaranteed the order of the elements when using an enumeration. This has more to do with basic data structures than with the API. You would need to use a container that has a guaranteed order, should you so wish. This has to do with the dynamic nature of enumerations: They need to be able to expand to store an unspecified amount of data. Should the requirement enforce ordering on as well, you would loose the speed of the enumeration. You can always run through the enumeration, store this in an ArrayList, and run Arrays.sort() on that, assuming that all the elements are Comparable. Comparable - You must be able to call ElementA ElementB without getting a cast exception. Have a look at the Java Collections Framework. hth, Paul On Wed, 2003-03-26 at 21:55, David Thielen wrote: Hi; When I retrieve the param-name/param-value pairs from web.xml via: Enumeration en = pageContext.getServletContext().getInitParameterNames(); It does not return them in the order they appear in web.xml. Is random order just part of the API definition? thanks - dave -- p niemandt [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Question about context-param
Hi all, I'm trying to initialize a few parameters from my web.xml to be available to my context. I'm just wondering when they become available. As I'm attempting to access them during my Context constructor and I'm getting to following exception trace. (This call was just trying to get the names not actually access the values but trying to access the values give similar results) java.lang.NullPointerException at javax.servlet.GenericServlet.getInitParameterNames(GenericServlet.java:167) at polaris.servlet.PolarisContext.init(PolarisContext.java:54) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:274) at java.lang.Class.newInstance0(Class.java:296) at java.lang.Class.newInstance(Class.java:249) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper. java:902) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:821) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3420) at org.apache.catalina.core.StandardContext.start(StandardContext.java:3 608) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188) at org.apache.catalina.core.StandardHost.start(StandardHost.java:738) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347 ) at org.apache.catalina.core.StandardService.start(StandardService.java:4 97) at org.apache.catalina.core.StandardServer.start(StandardServer.java:218 9) at org.apache.catalina.startup.Catalina.start(Catalina.java:512) at org.apache.catalina.startup.Catalina.execute(Catalina.java:400) at org.apache.catalina.startup.Catalina.process(Catalina.java:180) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203) The only thing I can think of is that the context-param isn't accessable until after the context constructor is finished. Which makes it not very helpfull for me. If anyone has another way of doing this without putting it into a properties file I'm interested. (The whole point of this is we're trying to migrate our properties to DB tables and need to give the app the DB user and password) Thanks -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Question about context-param
Howdy, Your context constructor? What's that? Last I checked, javax.servlet.ServletContext was an interface, and the container provides an implementation. If you want to tie into the context lifecycle, which is a very valid design, use a ServletContextListener implementation. The context parameters are available in that listener's contextInitialized() method. Yoav Shapira Millennium ChemInformatics -Original Message- From: Mike Roest [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 16, 2003 1:49 PM To: [EMAIL PROTECTED] Subject: Question about context-param Hi all, I'm trying to initialize a few parameters from my web.xml to be available to my context. I'm just wondering when they become available. As I'm attempting to access them during my Context constructor and I'm getting to following exception trace. (This call was just trying to get the names not actually access the values but trying to access the values give similar results) java.lang.NullPointerException at javax.servlet.GenericServlet.getInitParameterNames(GenericServlet.java: 167) at polaris.servlet.PolarisContext.init(PolarisContext.java:54) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructor Acce ssorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingCon stru ctorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:274) at java.lang.Class.newInstance0(Class.java:296) at java.lang.Class.newInstance(Class.java:249) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper. java:902) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:821) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext. java :3420) at org.apache.catalina.core.StandardContext.start(StandardContext.java:3 608) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188) at org.apache.catalina.core.StandardHost.start(StandardHost.java:738) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347 ) at org.apache.catalina.core.StandardService.start(StandardService.java:4 97) at org.apache.catalina.core.StandardServer.start(StandardServer.java:218 9) at org.apache.catalina.startup.Catalina.start(Catalina.java:512) at org.apache.catalina.startup.Catalina.execute(Catalina.java:400) at org.apache.catalina.startup.Catalina.process(Catalina.java:180) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203) The only thing I can think of is that the context-param isn't accessable until after the context constructor is finished. Which makes it not very helpfull for me. If anyone has another way of doing this without putting it into a properties file I'm interested. (The whole point of this is we're trying to migrate our properties to DB tables and need to give the app the DB user and password) Thanks -- To unsubscribe, e-mail: mailto:tomcat-user- [EMAIL PROTECTED] For additional commands, e-mail: mailto:tomcat-user- [EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Question about context-param
Sorry 2 different Contexts, and my brain was all messed up. When I'm refering to my Context Constructor it's actually the main servlet constructor (which in our app is PolarisContext). Which extends HttpServlet. Sorry for the confusion Shapira, Yoav wrote: Howdy, Your context constructor? What's that? Last I checked, javax.servlet.ServletContext was an interface, and the container provides an implementation. If you want to tie into the context lifecycle, which is a very valid design, use a ServletContextListener implementation. The context parameters are available in that listener's contextInitialized() method. Yoav Shapira Millennium ChemInformatics -Original Message- From: Mike Roest [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 16, 2003 1:49 PM To: [EMAIL PROTECTED] Subject: Question about context-param Hi all, I'm trying to initialize a few parameters from my web.xml to be available to my context. I'm just wondering when they become available. As I'm attempting to access them during my Context constructor and I'm getting to following exception trace. (This call was just trying to get the names not actually access the values but trying to access the values give similar results) java.lang.NullPointerException at javax.servlet.GenericServlet.getInitParameterNames(GenericServlet.java: 167) at polaris.servlet.PolarisContext.init(PolarisContext.java:54) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructor Acce ssorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingCon stru ctorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:274) at java.lang.Class.newInstance0(Class.java:296) at java.lang.Class.newInstance(Class.java:249) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper. java:902) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:821) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext. java :3420) at org.apache.catalina.core.StandardContext.start(StandardContext.java:3 608) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188) at org.apache.catalina.core.StandardHost.start(StandardHost.java:738) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347 ) at org.apache.catalina.core.StandardService.start(StandardService.java:4 97) at org.apache.catalina.core.StandardServer.start(StandardServer.java:218 9) at org.apache.catalina.startup.Catalina.start(Catalina.java:512) at org.apache.catalina.startup.Catalina.execute(Catalina.java:400) at org.apache.catalina.startup.Catalina.process(Catalina.java:180) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203) The only thing I can think of is that the context-param isn't accessable until after the context constructor is finished. Which makes it not very helpfull for me. If anyone has another way of doing this without putting it into a properties file I'm interested. (The whole point of this is we're trying to migrate our properties to DB tables and need to give the app the DB user and password) Thanks -- To unsubscribe, e-mail: mailto:tomcat-user- [EMAIL PROTECTED] For additional commands, e-mail: mailto:tomcat-user- [EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Question about context-param
Howdy, Sorry 2 different Contexts, and my brain was all messed up. When I'm refering to my Context Constructor it's actually the main servlet constructor (which in our app is PolarisContext). Which extends HttpServlet. OK, that makes a bit more sense. Although a similar argument applies. Even though a servlet is a normal class, and you can create a constructor for it and do stuff in the constructor, you probably shouldn't. Instead, stick with overriding Servlet methods, in this case init. The container is required to make the servlet context parameters available to your servlet's init() method. It's not required to make them available to your servlet's constructor. So for portability and a little bit less of a headache, you're better off not writing a servlet constructor and moving the constructor code to the servlet's init() method. Yoav Shapira Millennium ChemInformatics -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Question about context-param
Shapira, Yoav wrote:
Howdy,
Sorry 2 different Contexts, and my brain was all messed up. When I'm
refering to my Context
Constructor it's actually the main servlet constructor (which in our
app is
PolarisContext). Which
extends HttpServlet.
OK, that makes a bit more sense. Although a similar argument applies.
Even though a servlet is a normal class, and you can create a
constructor for it and do stuff in the constructor, you probably
shouldn't. Instead, stick with overriding Servlet methods, in this case
init. The container is required to make the servlet context parameters
available to your servlet's init() method. It's not required to make
them available to your servlet's constructor. So for portability and a
little bit less of a headache, you're better off not writing a servlet
constructor and moving the constructor code to the servlet's init()
method.
Ok that worked great. I don't get the exceptions anymore but for some reason it's not pulling the
params from the web.xml. Any Ideas?
code:
try {
username = this.getInitParameter(oracleUser);
password = this.getInitParameter(oraclePass);
System.out.println(user: +username+\npass: +password);
} catch(Exception e) { e.printStackTrace(); }
web.xml:
?xml version=1.0 encoding=ISO-8859-1?
!DOCTYPE web-app
PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.2//EN
http://java.sun.com/j2ee/dtds/web-app_2.2.dtd;
web-app
context-param
param-nameoraclePass/param-name
param-valuepolaris/param-value
/context-param
context-param
param-nameoracleUser/param-name
param-valuepolaris/param-value
/context-param
servlet
servlet-namePolarisContext/servlet-name
servlet-classpolaris.servlet.PolarisContext/servlet-class
load-on-startup1/load-on-startup
/servlet
security-constraint
web-resource-collection
web-resource-namepolaris/web-resource-name
url-pattern/servlet/*/url-pattern
/web-resource-collection
/security-constraint
/web-app
--
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RE: Question about context-param
Howdy, Ok that worked great. I don't get the exceptions anymore but for some reason it's not pulling the params from the web.xml. Any Ideas? If the code below is taken from a servlet, then this.getInitParameter() will look for an init-parameter element inside the servlet element. To get a context parameter from a servlet, you do: String userName = getServletContext().getInitParameter(oracleUser); By the way, I don't remember if you mentioned what tomcat version you're using. But if you're using tomcat 4.x, you web.xml should be compliant with the 2.3 spec version, not 2.2. Yoav Shapira Millennium ChemInformatics -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Question about context-param
Shapira, Yoav wrote: Howdy, Ok that worked great. I don't get the exceptions anymore but for some reason it's not pulling the params from the web.xml. Any Ideas? If the code below is taken from a servlet, then this.getInitParameter() will look for an init-parameter element inside the servlet element. To get a context parameter from a servlet, you do: String userName = getServletContext().getInitParameter(oracleUser); By the way, I don't remember if you mentioned what tomcat version you're using. But if you're using tomcat 4.x, you web.xml should be compliant with the 2.3 spec version, not 2.2. Yeah it's 4.1.18. /me goes and changes the Spec Thank you very much Yoav it's now working perfectly I appreciate the help. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
context-param
Yoav (or anyone else that can help me) - I made the changes to my web.xml file as recommended. Two questions: 1) do I need a seperate context-param tag for each context parameter, or can I put them all in the same block? 2) where is the best place to call getServletContext().getInitParameter(driver) within a servlet? In the init() method? Or on the fly, for example at the start of the doGet() method? Thanks again, I appreciate the help!! Geoff -Original Message- From: Shapira, Yoav [mailto:[EMAIL PROTECTED]] Sent: Monday, January 13, 2003 5:22 PM To: Tomcat Users List Subject: RE: Can't find servlet Hi, I didn't read previous messages in your thread, so my answer may be incorrect / out of context... Why are you repeating all the init-params that are the same, such as the driver? It's better practice to have just one context-param for this. Every servlet can then get it by doing getServletContext().getInitParameter(driver); You don't need to declare your servlets in $CATALINA_HOME/conf/web.xml, only in your own webapp's web.xml. Yoav Shapira Millennium ChemInformatics -Original Message- From: Geoff Peters [mailto:[EMAIL PROTECTED]] Sent: Monday, January 13, 2003 4:19 PM To: Tomcat Users List Subject: RE: Can't find servlet John - You solved another one of my problems that I wasn't even sure that I had! (did that make sense??) If I uncomment that servlet-mapping block for the invoker my servlet works, if not, my servlet throws the servlet not available error. The funny thing is I have declared all of my servlets in my application web.xml, do I need to define these in the /conf/web.xml as well? Here is my application web.xml, am I missing anything? THANKS!!! Geoff ?xml version=1.0 encoding=ISO-8859-1? !DOCTYPE web-app PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.3//EN http://java.sun.com/dtd/web-app_2_3.dtd; web-app display-nameiFax Development/display-name description iFax Development /description servlet servlet-namesend/servlet-name display-nameIfaxSend/display-name servlet-classIfaxSend/servlet-class init-param param-namedriver/param-name param-valuesun.jdbc.odbc.JdbcOdbcDriver/param-value /init-param init-param param-nameuploadDir/param-name param-valued:\Work_Files\jakarta-tomcat- 4.1.18\webapps\IfaxSend\temp/param-value /init-param init-param param-nameodbc/param-name param-valuejdbc:odbc:replixdb/param-value /init-param init-param param-namedbUser/param-name param-valueuser/param-value /init-param init-param param-namedbPass/param-name param-valuepass/param-value /init-param /servlet servlet servlet-nameuserdetails/servlet-name display-nameIfaxUserDetails/display-name servlet-classIfaxUserDetails/servlet-class init-param param-namedriver/param-name param-valuesun.jdbc.odbc.JdbcOdbcDriver/param-value /init-param init-param param-nameodbc/param-name param-valuejdbc:odbc:replixdb/param-value /init-param init-param param-namedbUser/param-name param-valueuser/param-value /init-param init-param param-namedbPass/param-name param-valuepass/param-value /init-param /servlet servlet servlet-nameonefax/servlet-name display-nameIfaxOneFax/display-name servlet-classIfaxOneFax/servlet-class init-param param-namedriver/param-name param-valuesun.jdbc.odbc.JdbcOdbcDriver/param-value /init-param init-param param-nameodbc/param-name param-valuejdbc:odbc:replixdb/param-value /init-param init-param param-namedbUser/param-name param-valueuser/param-value /init-param init-param param-namedbPass/param-name param-valuepass/param-value /init-param init-param param-namefaxPath/param-name param-valuec:\\Softlinx\\ReplixServer\\spool\\/param- value /init-param init-param param-nameuploadDir/param-name param-valued:\Work_Files\jakarta-tomcat- 4.1.18\webapps
RE: context-param
Howdy, 1) do I need a seperate context-param tag for each context parameter, or can I put them all in the same block? Separate context-param for each parameter. They're just like init-params in that way. See the servlet specification's explanation of the web.xml fields for more details. 2) where is the best place to call getServletContext().getInitParameter(driver) within a servlet? In the init() method? Or on the fly, for example at the start of the doGet() method? Doesn't really matter. It's always going to be available. As their name suggests, they're typically used during initialization to set up things like database connections (and pools), JNDI entities, etc. But the servlet container is required to make the ServletContext available to its servlets as long as the context is running. So you can use it anywhere: init, service methods, destroy... Yoav Shapira Millennium ChemInformatics -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: error accessing a context-param from web.xml
Probably your task is better to accomplish with JNDI Resources, http://localhost:8080/tomcat-docs/jndi-resources-howto.html That is more elegant solution, and that is for what JNDI Resources are designed Or are there any other reasons why do you want to carry out this context-param way? ilis On Tuesday 03 September 2002 19:55, you wrote: Hi, I am fairly new to using Tomcat. I am attempting to use a centralized location to define the MySQL access configuration info. It is my understanding that the /WEB-INF/web.xml is the best location to store this info. I have defined a set of JDBC parameters such as the driver info shown below in my web.xml file for the web app: context-param param-namejdbc.driver/param-name param-valuecom.mysql.jdbc.Driver/param-value /context-param ... Within a JSP file, I attempt to get the parameter via the implicit application variable: sql:setDataSource driver=%= application.getInitParameter(jdbc.driver) % url=%= application.getInitParameter(jdbc.url) % user=%= application.getInitParameter(jdbc.username) % password=%= application.getInitParameter(jdbc.password) % var=db / Unfortunately, I receive the following error: org.apache.jasper.compiler.ParseException: /search-all-cables.jsp(10,56) Attribute jdbc.driver has no value at org.apache.jasper.compiler.JspReader.parseAttributeValue(JspReader.java:563 ) ... FYI, I am using Tomcat 4.0.4 with J2SDK 1.4.0_01. Thank you, Michael -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: error accessing a context-param from web.xml
The error you are getting is the JSP parser mistaking the data %= application.getInitParameter( as the value for the driver parameter of the sql:setDataSource tag. Then it reports a parsing error as the next parameter is sees is jdbc.driver with no '=', and hence no value, after it. If you really want to set up a datasource this way try: sql:setDataSource driver='%= application.getInitParameter(jdbc.driver) %' url='%= application.getInitParameter(jdbc.url) %' user='%= application.getInitParameter(jdbc.username) %' password='%= application.getInitParameter(jdbc.password) %' var='db' / Note the single quotes. This should work as there's nothing wrong with how you are accessing the init params. http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jndi-resources-howto.html -Original Message- From: Michael R. Schwab [mailto:[EMAIL PROTECTED]] Sent: 03 September 2002 18:56 To: Tomcat Users List Subject: error accessing a context-param from web.xml Hi, I am fairly new to using Tomcat. I am attempting to use a centralized location to define the MySQL access configuration info. It is my understanding that the /WEB-INF/web.xml is the best location to store this info. I have defined a set of JDBC parameters such as the driver info shown below in my web.xml file for the web app: context-param param-namejdbc.driver/param-name param-valuecom.mysql.jdbc.Driver/param-value /context-param ... Within a JSP file, I attempt to get the parameter via the implicit application variable: sql:setDataSource driver=%= application.getInitParameter(jdbc.driver) % url=%= application.getInitParameter(jdbc.url) % user=%= application.getInitParameter(jdbc.username) % password=%= application.getInitParameter(jdbc.password) % var=db / Unfortunately, I receive the following error: org.apache.jasper.compiler.ParseException: /search-all-cables.jsp(10,56) Attribute jdbc.driver has no value at org.apache.jasper.compiler.JspReader.parseAttributeValue(JspReader.java:563) ... FYI, I am using Tomcat 4.0.4 with J2SDK 1.4.0_01. Thank you, Michael -- Michael R. Schwab Design Engineer QCC Communications Corp. [EMAIL PROTECTED] Voice: (306) 249-0220 Fax: (306) 249-5128 -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: error accessing a context-param from web.xml
Thanks ilis and jon, I'll take a look at JNDI. Michael On Wed, Sep 04, 2002 at 10:34:10AM +0100, jon wingfield wrote: The error you are getting is the JSP parser mistaking the data %= application.getInitParameter( as the value for the driver parameter of the sql:setDataSource tag. Then it reports a parsing error as the next parameter is sees is jdbc.driver with no '=', and hence no value, after it. If you really want to set up a datasource this way try: sql:setDataSource driver='%= application.getInitParameter(jdbc.driver) %' url='%= application.getInitParameter(jdbc.url) %' user='%= application.getInitParameter(jdbc.username) %' password='%= application.getInitParameter(jdbc.password) %' var='db' / Note the single quotes. This should work as there's nothing wrong with how you are accessing the init params. http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jndi-resources-howto.html -Original Message- From: Michael R. Schwab [mailto:[EMAIL PROTECTED]] Sent: 03 September 2002 18:56 To: Tomcat Users List Subject: error accessing a context-param from web.xml Hi, I am fairly new to using Tomcat. I am attempting to use a centralized location to define the MySQL access configuration info. It is my understanding that the /WEB-INF/web.xml is the best location to store this info. I have defined a set of JDBC parameters such as the driver info shown below in my web.xml file for the web app: context-param param-namejdbc.driver/param-name param-valuecom.mysql.jdbc.Driver/param-value /context-param ... Within a JSP file, I attempt to get the parameter via the implicit application variable: sql:setDataSource driver=%= application.getInitParameter(jdbc.driver) % url=%= application.getInitParameter(jdbc.url) % user=%= application.getInitParameter(jdbc.username) % password=%= application.getInitParameter(jdbc.password) % var=db / Unfortunately, I receive the following error: org.apache.jasper.compiler.ParseException: /search-all-cables.jsp(10,56) Attribute jdbc.driver has no value at org.apache.jasper.compiler.JspReader.parseAttributeValue(JspReader.java:563) ... FYI, I am using Tomcat 4.0.4 with J2SDK 1.4.0_01. Thank you, Michael -- Michael R. Schwab Design Engineer QCC Communications Corp. [EMAIL PROTECTED] Voice: (306) 249-0220 Fax: (306) 249-5128 -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- Michael R. Schwab Design Engineer QCC Communications Corp. [EMAIL PROTECTED] Voice: (306) 249-0220 Fax: (306) 249-5128 -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
error accessing a context-param from web.xml
Hi, I am fairly new to using Tomcat. I am attempting to use a centralized location to define the MySQL access configuration info. It is my understanding that the /WEB-INF/web.xml is the best location to store this info. I have defined a set of JDBC parameters such as the driver info shown below in my web.xml file for the web app: context-param param-namejdbc.driver/param-name param-valuecom.mysql.jdbc.Driver/param-value /context-param ... Within a JSP file, I attempt to get the parameter via the implicit application variable: sql:setDataSource driver=%= application.getInitParameter(jdbc.driver) % url=%= application.getInitParameter(jdbc.url) % user=%= application.getInitParameter(jdbc.username) % password=%= application.getInitParameter(jdbc.password) % var=db / Unfortunately, I receive the following error: org.apache.jasper.compiler.ParseException: /search-all-cables.jsp(10,56) Attribute jdbc.driver has no value at org.apache.jasper.compiler.JspReader.parseAttributeValue(JspReader.java:563) ... FYI, I am using Tomcat 4.0.4 with J2SDK 1.4.0_01. Thank you, Michael -- Michael R. Schwab Design Engineer QCC Communications Corp. [EMAIL PROTECTED] Voice: (306) 249-0220 Fax: (306) 249-5128 -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: context-param for a list/array of values ?
Howdy,
There are a couple of ways. My favorite is:
param-namejndi.resources/param-name
param-valuejndi/a,jndi/b,jndi/c/param-value
String jndiString =
getServletContext().getInitParameter(jndi.resources);
StringTokenizer st = new StringTokenizer(jndiString, ,);
ArrayList jndiResources = new ArrayList();
while(st.hasMoreTokens())
{
jndiResources.add(st.nextToken());
}
That's it, very simple. ;)
Yoav Shapira
Millennium ChemInformatics
-Original Message-
From: Soefara Redzuan [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, July 23, 2002 7:08 PM
To: [EMAIL PROTECTED]
Subject: context-param for a list/array of values ?
In web.xml, variables can be defined like this,
context-param
param-namegui.bgcolor/param-name
param-value#00/param-value
/context-param
And then in your servlet or JSP,
String guiBgColor =
getServletContext().getInitParameter(gui.bgcolor);
But how can I assign a list or array of values to a variable
in web.xml ? For example, I wish to configure the available
JNDI datasources available to a webapp, so that the end user
can select one. Is it something like this ?
context-param
param-namejndi.resources/param-name
param-valuejdbc/users/param-value
param-valuejdbc/accounts/param-value
param-valuejdbc/finance/param-value
/context-param
But then how would I extract values in my JSP or servlet ?
Soefara
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RE: context-param for a list/array of values ?
From: Shapira, Yoav [EMAIL PROTECTED]
Subject: RE: context-param for a list/array of values ?
Howdy,
There are a couple of ways. My favorite is:
param-namejndi.resources/param-name
param-valuejndi/a,jndi/b,jndi/c/param-value
String jndiString =
getServletContext().getInitParameter(jndi.resources);
StringTokenizer st = new StringTokenizer(jndiString, ,);
ArrayList jndiResources = new ArrayList();
while(st.hasMoreTokens())
{
jndiResources.add(st.nextToken());
}
That's it, very simple. ;)
Oh my, now why didn't I think of that ? :)
I had thought there would be something like request.getParameterValues()
which allows us to detect an array of values.
Ex. a fictional getServletContext().getInitParameterValues()
Looks like I'll have to go with the String split instead :-)
Thank you, Yoav.
Soefara.
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context param is null outside doGet
Why is it that context parameters are null outside the doGet block of a
servlet?
For example, suppose I have the following in web.xml:
context-param
param-namebasepath/param-name
param-valuebob/param-value
/context-param
Why does Servlet 1 below print out bob while Sevlet 2 gives me a
NullPointerException error? Why isn't the context parameter available
outside the doGet block?
Servlet 1
==
public class Hello extends HttpServlet{
public void doGet(HttpServletRequest request HttpServletResponse response)
throws IOException, ServletException{
PrintWriter out = response.getWriter();
out.println(getServletContext()getInitParameter(basepath));
out.close();
}
}
Servlet 2
==
public class Hello extends HttpServlet{
private String basepath = getServletContext()getInitParameter(basepath);
public void doGet(HttpServletRequest request HttpServletResponse response)
throws IOException, ServletException{
PrintWriter out = response.getWriter();
out.println(basepath);
out.close();
}
}
Thank you,
Mike
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RE: context param is null outside doGet
With out looking at the HttpServlet source to confirm i would guess that:
In servlet 2 the member variable basepath is assigned a value after the
super class (HttpServlet) constructor returns but before the servlets
init(...) method is called by the servlet container. Therefore at the time
of assignment the servlet context is not set on the servlet and a NPE
results. That would be my guess.
Override init(...) call super.init(...) and then assign the value to
basepath.
Jon
-Original Message-
From: Mike Millson [mailto:[EMAIL PROTECTED]]
Sent: 08 June 2002 14:55
To: Tomcat Users List
Subject: context param is null outside doGet
Why is it that context parameters are null outside the doGet block of a
servlet?
For example, suppose I have the following in web.xml:
context-param
param-namebasepath/param-name
param-valuebob/param-value
/context-param
Why does Servlet 1 below print out bob while Sevlet 2 gives me a
NullPointerException error? Why isn't the context parameter available
outside the doGet block?
Servlet 1
==
public class Hello extends HttpServlet{
public void doGet(HttpServletRequest request HttpServletResponse response)
throws IOException, ServletException{
PrintWriter out = response.getWriter();
out.println(getServletContext()getInitParameter(basepath));
out.close();
}
}
Servlet 2
==
public class Hello extends HttpServlet{
private String basepath = getServletContext()getInitParameter(basepath);
public void doGet(HttpServletRequest request HttpServletResponse response)
throws IOException, ServletException{
PrintWriter out = response.getWriter();
out.println(basepath);
out.close();
}
}
Thank you,
Mike
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problem with context-param in web.xml
Hello, I work with Tomcat 4.0 and I'd like to set a context-param in my web.xml file of my web application. So I do this : web-app servlet servlet-nameadd/servlet-name servlet-classAddServlet/servlet-class /servlet context-param param-namelogFile/param-name param-valuec:/jakarta-tomcat-4.0.1/webapps/myWebapps/file/param-value /context-param error-page exception-typejavax.servlet.UnavailableException/exception-type location /unavailable.html /location /error-page /web-app But when I declare my context-param and then when I restart my server, I have a SAXException whitch explain me that the web.xml file is not correct. Can anyone help me please? thanks. Aline WEBCASTER T +33 (0)3 28 36 25 25 F +33 (0)3 20 13 06 04 http://www.oeilpouroeil.fr http://www.visiodrome.com -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Re: problem with context-param in web.xml
Aline wrote: servlet servlet-nameadd/servlet-name servlet-classAddServlet/servlet-class /servlet a SAXException whitch explain me that the web.xml file is not correct. there's a missing closing bracket /servlet-class .. regards martin -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Re: problem with context-param in web.xml
You've got to follow the order of ELEMENTS as specified in the Java Web Application Descriptor DTD : servlet .../servlet is supposed to be after context-param .../context-param jmt On Thursday 14 March 2002 14:04, Aline wrote: Hello, I work with Tomcat 4.0 and I'd like to set a context-param in my web.xml file of my web application. So I do this : web-app servlet servlet-nameadd/servlet-name servlet-classAddServlet/servlet-class /servlet context-param param-namelogFile/param-name param-valuec:/jakarta-tomcat-4.0.1/webapps/myWebapps/file/param-value /context-param error-page exception-typejavax.servlet.UnavailableException/exception-type location /unavailable.html /location /error-page /web-app But when I declare my context-param and then when I restart my server, I have a SAXException whitch explain me that the web.xml file is not correct. Can anyone help me please? thanks. Aline WEBCASTER T +33 (0)3 28 36 25 25 F +33 (0)3 20 13 06 04 http://www.oeilpouroeil.fr http://www.visiodrome.com -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
R: problem with context-param in web.xml
-Messaggio originale- Da: Aline [mailto:[EMAIL PROTECTED]] Inviato: giovedì 14 marzo 2002 14.05 A: Tomcat Users List Oggetto: problem with context-param in web.xml Hello, I work with Tomcat 4.0 and I'd like to set a context-param in my web.xml file of my web application. So I do this : web-app servlet servlet-nameadd/servlet-name servlet-classAddServlet/servlet-class perhaps an angular bracket is missing /servlet context-param param-namelogFile/param-name param-valuec:/jakarta-tomcat-4.0.1/webapps/myWebapps/file/p aram-value /context-param error-page exception-typejavax.servlet.UnavailableException/exception-type location /unavailable.html /location /error-page /web-app But when I declare my context-param and then when I restart my server, I have a SAXException whitch explain me that the web.xml file is not correct. Can anyone help me please? thanks. Aline Best regards Paolo -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
RE: problem with context-param in web.xml
Hi, I'm trying to integrate Cocoon with tomcat 4.0.1. I get the folowing exception during start-up: java.io.FileNotFoundException at org.apache.naming.resources.DirContextURLConnection.getInputStream(DirContex tURLConnection.java:344) at org.apache.cocoon.Cocoon.init(Cocoon.java:131) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:852) at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:615) at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java :396) at org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:180) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:247) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:193) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja va:243) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 66) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja va:201) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 66) at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:2 46) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 64) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2344) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164 ) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 66) at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve. java:170) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 64) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170 ) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 64) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:462) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 64) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java :163) at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5 66) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java: 1011) at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1106 ) at java.lang.Thread.run(Unknown Source) How can I fix this problem ? Yuval -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Access web.xml context-param From A Bean?
I have values I want set at deployment time declared in my web.xml. I am accessing these with no problem from my JSPs with: %= application.getInitParameter(paramNameHere) % However, for my business logic which I have pulled out the if JSPs and put into beans, I can't figure out how to access these values? Is there way to get to values stored in the container from a bean? TIA, Kennedy -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Re: Access web.xml context-param From A Bean?
On Sun, 17 Feb 2002, Kennedy Clark wrote:
Date: Sun, 17 Feb 2002 11:04:09 -0500
From: Kennedy Clark [EMAIL PROTECTED]
Reply-To: Tomcat Users List [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: Access web.xml context-param From A Bean?
I have values I want set at deployment time declared in my web.xml. I am
accessing these with no problem from my JSPs with:
%= application.getInitParameter(paramNameHere) %
However, for my business logic which I have pulled out the if JSPs and put
into beans, I can't figure out how to access these values? Is there way to
get to values stored in the container from a bean?
In order to access these parameters, you need a reference to the
ServletContext object for your web application, which is what a JSP page
sees as the application variable, inside your JavaBean. For example,
you might include a setServletContext() method on your bean, and call it
when the bean is created.
An alternative approach that works in Tomcat 4 and any J2EE server is to
use environment entries instead of context initialization parameters
for this purpose. For example, the following entry in web.xml:
env-entry
env-entry-nameparamNameHere/env-entry-name
env-entry-valueThis is the parameter value/env-entry-value
env-entry-typejava.lang.String/env-entry-type
/env-entry
can be accessed from a bean, running inside your web application, like
this:
import javax.naming.InitialContext;
public class FooBean {
...
InitialContext context = new InitialContext();
String paramValue = (String)
context.lookup(java:comp/env/paramNameHere);
...
}
This works because the container provides an implementation of the
InitialContext APIs (from JNDI) that contains all the environment entries
configured in either the web.xml file or set by appropriate commands in
server.xml. You don't need a direct reference to the ServletContext to
read them, so no setServletContext() method is required.
Besides environment entries, the JNDI InitialContext can be used to make
lots of other resources available to your web application (such as JDBC
connection pools) but allows them to be configured externally. For more
information, see the JNDI Resources How-To in the Tomcat docs:
http://localhost:8080/tomcat-docs/jndi-resources-howto.html
or online at:
http://jakarta.apache.org/tomcat/tomcat-4.0-doc/jndi-resources-howto.html
TIA, Kennedy
Craig
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context-param [ hpux/nt tomcat 3.x 4.x ]
Hi,
I want to access a context-param inside the context tag of the main
server.xml file.
I can access parameters inside the web.xml (stored in the web-inf)
directory, but that is stored inside the war/web project directory, how can
I access parameters declared in the main server.xml file.
Below is the code I use to iterate through the application parameters, so
what do I need to change for the top level context params ?
java.util.Enumeration appIter = application.getInitParameterNames();
while( appIter.hasMoreElements() )
{
String strName = (String)appIter.nextElement();
out.println( Application. + strName + BR );
}
I have tried the config, session and page objects but they didn't work
either.
Thanks in advance
Stuart.
PS, yes I have already searched the web archives. :)
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Re: context-param [ hpux/nt tomcat 3.x 4.x ]
There is no current support for setting context initialization parameters
in the server.xml file for any version of Tomcat. If you'd like to
propose this, please submit an enhancement request to the bug tracking
system (under product category Tomcat 3 or Tomcat 4 as appropriate):
http://nagoya.apache.org/bugzilla/
Craig McClanahan
On Tue, 4 Sep 2001, James, Stuart wrote:
Date: Tue, 4 Sep 2001 17:31:48 +0100
From: James, Stuart [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
To: '[EMAIL PROTECTED]' [EMAIL PROTECTED]
Subject: context-param [ hpux/nt tomcat 3.x 4.x ]
Hi,
I want to access a context-param inside the context tag of the main
server.xml file.
I can access parameters inside the web.xml (stored in the web-inf)
directory, but that is stored inside the war/web project directory, how can
I access parameters declared in the main server.xml file.
Below is the code I use to iterate through the application parameters, so
what do I need to change for the top level context params ?
java.util.Enumeration appIter = application.getInitParameterNames();
while( appIter.hasMoreElements() )
{
String strName = (String)appIter.nextElement();
out.println( Application. + strName + BR );
}
I have tried the config, session and page objects but they didn't work
either.
Thanks in advance
Stuart.
PS, yes I have already searched the web archives. :)
___
Email Disclaimer
This communication is for the attention of the
named recipient only and should not be passed
on to any other person. Information relating to
any company or security, is for information
purposes only and should not be interpreted as
a solicitation or offer to buy or sell any security.
The information on which this communication is based
has been obtained from sources we believe to be reliable,
but we do not guarantee its accuracy or completeness.
All expressions of opinion are subject to change
without notice. All e-mail messages, and associated attachments,
are subject to interception and monitoring for lawful business purposes.
___
Re: context-param
On Tue, 28 Aug 2001, Mills, Theo wrote: Date: Tue, 28 Aug 2001 13:41:07 -0500 From: Mills, Theo [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] To: '[EMAIL PROTECTED]' [EMAIL PROTECTED] Subject: context-param Anyone know how to access an application-wide context-param from a servlet? The simplest way is to use a context parameter in your web.xml file: context-param param-nameglobal-name/param-name param-valueThis is the parameter value/param-value /context-param which you can retrieve from a servlet by calling: getServletContext().getInitParameter(global-name); NOTE: There are rules you *must* follow about the order of elements in your web.xml file -- see the Servlet Specification, which you can download from: http://java.sun.com/products/servlet/download.html Craig McClanahan
context-param
Anyone know how to access an application-wide context-param from a servlet?
Getting context-param in servlet problems...ARGH
Hi there, I'm going slightly crazy. I want to get a parameter from the context-param section from my web.xml in my servlet. But I can't get it to work. I quote from the example web.xml in the Tomcat docs: quote The values actually assigned to these parameters can be retrieved in a servlet or JSP page by calling: String value = getServletContext().getInitParameter(name); where name matches the param-name element of one of these initialization parameters. /quote When I copy and paste this line of code into my init() method of my servlet I get a compilation error: MyServlet.java: Error #: 300 : method getInitParameter(java.lang.String) not found in interface javax.servlet.ServletContext at line 35, column 40 I'm really confused now. My web.xml is below. Help ! Best regards, Marcel My web.xml: ?xml version=1.0 encoding=ISO-8859-1? !DOCTYPE web-app PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.2//EN http://java.sun.com/j2ee/dtds/web-app_2_2.dtd; web-app context-param param-namejdbcDriverName/param-name param-valueorg.gjt.mm.mysql.Driver/param-value /context-param context-param param-namejdbcConnectString/param-name param-valuejdbc:mysql://localhost/db/param-value /context-param servlet servlet-name servlet1 /servlet-name servlet-class Servlet1 /servlet-class /servlet servlet servlet-name servlet2 /servlet-name servlet-class Servlet2 /servlet-class /servlet servlet-mapping servlet-nameservlet1/servlet-name url-pattern/*/url-pattern /servlet-mapping servlet-mapping servlet-nameservlet2/servlet-name url-pattern/log/*/url-pattern /servlet-mapping /web-app
AW: Getting context-param in servlet problems...ARGH
I guess that your having a wrong JSDK in your classpath. ServletContext.getInitParameter() has been introduced with JSDK 2.2. Versions prior to this just had GenricServlet.getInitParmeter() and ServletConfig..getInitParmeter(). -Ursprüngliche Nachricht- Von: Marcel van Beurden (ETM) [mailto:[EMAIL PROTECTED]] Gesendet: Dienstag, 24. April 2001 09:21 An: '[EMAIL PROTECTED]' Betreff: Getting context-param in servlet problems...ARGH Hi there, I'm going slightly crazy. I want to get a parameter from the context-param section from my web.xml in my servlet. But I can't get it to work. I quote from the example web.xml in the Tomcat docs: quote The values actually assigned to these parameters can be retrieved in a servlet or JSP page by calling: String value = getServletContext().getInitParameter(name); where name matches the param-name element of one of these initialization parameters. /quote When I copy and paste this line of code into my init() method of my servlet I get a compilation error: MyServlet.java: Error #: 300 : method getInitParameter(java.lang.String) not found in interface javax.servlet.ServletContext at line 35, column 40 I'm really confused now. My web.xml is below. Help ! Best regards, Marcel My web.xml: ?xml version=1.0 encoding=ISO-8859-1? !DOCTYPE web-app PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.2//EN http://java.sun.com/j2ee/dtds/web-app_2_2.dtd; web-app context-param param-namejdbcDriverName/param-name param-valueorg.gjt.mm.mysql.Driver/param-value /context-param context-param param-namejdbcConnectString/param-name param-valuejdbc:mysql://localhost/db/param-value /context-param servlet servlet-name servlet1 /servlet-name servlet-class Servlet1 /servlet-class /servlet servlet servlet-name servlet2 /servlet-name servlet-class Servlet2 /servlet-class /servlet servlet-mapping servlet-nameservlet1/servlet-name url-pattern/*/url-pattern /servlet-mapping servlet-mapping servlet-nameservlet2/servlet-name url-pattern/log/*/url-pattern /servlet-mapping /web-app
RE: Getting context-param in servlet problems...SOLVED
It's working now! Thanks again. -Original Message- From: Ralph Einfeldt [mailto:[EMAIL PROTECTED]] Sent: dinsdag 24 april 2001 9:45 To: '[EMAIL PROTECTED]' Subject: AW: Getting context-param in servlet problems...ARGH I guess that your having a wrong JSDK in your classpath. ServletContext.getInitParameter() has been introduced with JSDK 2.2. Versions prior to this just had GenricServlet.getInitParmeter() and ServletConfig..getInitParmeter(). -Ursprüngliche Nachricht- Von: Marcel van Beurden (ETM) [mailto:[EMAIL PROTECTED]] Gesendet: Dienstag, 24. April 2001 09:21 An: '[EMAIL PROTECTED]' Betreff: Getting context-param in servlet problems...ARGH Hi there, I'm going slightly crazy. I want to get a parameter from the context-param section from my web.xml in my servlet. But I can't get it to work. I quote from the example web.xml in the Tomcat docs: quote The values actually assigned to these parameters can be retrieved in a servlet or JSP page by calling: String value = getServletContext().getInitParameter(name); where name matches the param-name element of one of these initialization parameters. /quote When I copy and paste this line of code into my init() method of my servlet I get a compilation error: MyServlet.java: Error #: 300 : method getInitParameter(java.lang.String) not found in interface javax.servlet.ServletContext at line 35, column 40 I'm really confused now. My web.xml is below. Help ! Best regards, Marcel My web.xml: ?xml version=1.0 encoding=ISO-8859-1? !DOCTYPE web-app PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.2//EN http://java.sun.com/j2ee/dtds/web-app_2_2.dtd; web-app context-param param-namejdbcDriverName/param-name param-valueorg.gjt.mm.mysql.Driver/param-value /context-param context-param param-namejdbcConnectString/param-name param-valuejdbc:mysql://localhost/db/param-value /context-param servlet servlet-name servlet1 /servlet-name servlet-class Servlet1 /servlet-class /servlet servlet servlet-name servlet2 /servlet-name servlet-class Servlet2 /servlet-class /servlet servlet-mapping servlet-nameservlet1/servlet-name url-pattern/*/url-pattern /servlet-mapping servlet-mapping servlet-nameservlet2/servlet-name url-pattern/log/*/url-pattern /servlet-mapping /web-app
global init param context-param
I am using context-param to set global variables for my servlets,
but my servlets are still not seeing them (the value is showing up as
null). Here is an example:
context-param
param-namebw.client.configDir/param-name
param-valueD:\dev\src\conf/param-value
/context-param
And the code snippet using the param:
oamFileProps.load(config.getInitParameter("bw.client.configDir") +
System.getProperty("file.separator") +
"SystemPref.properties");
And the exception being generated:
java.io.FileNotFoundException: null\SystemPref.properties (The system
cannot find the path specified)
I'm not sure why this is coming up as null. Or should this be defined as
init-param for the servlets? This could be a problem because there are
dozens and dozens of servlets using these parameters, and which ones those
are I don't know (I'm not part of the programming team for this, just the
sysadmin trying to deploy it all). Again, this value was defined as a
global init parameter in the older JServ properties file.
-- Brett
http://www.chapelperilous.net/~bmccoy/
---
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Often have a share in their misfortunes.
-- Bertolt Brecht, "The Caucasian Chalk Circle"
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RE: global init param context-param
oamFileProps.load(config.getInitParameter("bw.client.configDir") +
System.getProperty("file.separator") +
"SystemPref.properties");
Context.getInitParameter for globals
-
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RE: global init param context-param
On Mon, 26 Feb 2001, Brett Knights wrote:
oamFileProps.load(config.getInitParameter("bw.client.configDir") +
System.getProperty("file.separator") +
"SystemPref.properties");
Context.getInitParameter for globals
Argh, I was hoping you wouldn't suggest a code change. :-)
-- Brett
http://www.chapelperilous.net/~bmccoy/
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A wise person makes his own decisions, a weak one obeys public opinion.
-- Chinese proverb
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Context-param troubles...
Hi everybody,
I'm definetly getting crasy with a context param ... I want to offer init
parameters to all my JSP pages... so In the WEB-INF/web.xml file of my
application, I've put something like :
...
context-param
param-nameRmiServer/param-name
param-value//10.10.10.7/BOB/param-value
description
Nom de l'objet RMI de connexion.
/description
/context-param
...
Who can I retrieve this value from a JSP Pages... I've tried many things
like getServletContext().getInitPArameter("RmiServer"); and it always
returns null ...
Heppp Pleaaze
Tcha.
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tomcat 4 b1 and context param
i writte this in the web.xml file and it reports me a error. Why? thanks context-param param-nameEmpresa/param-name /param-valueSN/param-value /context-param - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
RE: tomcat 4 b1 and context param
i writte this in the web.xml file and it reports me a error. Why? thanks context-param param-nameEmpresa/param-name /param-valueSN/param-value /context-param If this is the exact text then it is because you are starting the param-value tag with an end tag. Replace the first /param-value with param-value. --- Michael Wentzel Software Developer Software As We Think - http://www.aswethink.com mailto:[EMAIL PROTECTED] - Punisher of those who cannot spell dumb! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
Re: tomcat 4 b1 and context param
Michael Wentzel wrote: i writte this in the web.xml file and it reports me a error. Why? thanks context-param param-nameEmpresa/param-name /param-valueSN/param-value /context-param If this is the exact text then it is because you are starting the param-value tag with an end tag. Replace the first /param-value with param-value. You also need to make sure that this entry is in the correct order in the web.xml file, as defined by the DTD. Tomcat 4.0 uses a validating XML parser to read this file, so you have to obey all the rule.s --- Michael Wentzel Craig McClanahan - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
context-param: illegal char
with this code in web.xml: context-param param-namedatabase_dsn/param-name param-valuejdbc:mysql://localhost/test?user=testpassword=test/param-value /context-param i get this error: Starting tomcat. Check logs/tomcat.log for error messages ERROR reading /home/jsp/forum/WEB-INF/web.xmlAt Next character must be ";" terminating reference to entity "password". ERROR reading /home/jsp/forum/WEB-INF/web.xmljava.lang.NullPointerException at org.apache.tomcat.util.xml.XmlMapper.readXml(XmlMapper.java, Compiled Code) at org.apache.tomcat.context.WebXmlReader.processFile(WebXmlReader.java, Compiled Code) at org.apache.tomcat.context.WebXmlReader.contextInit(WebXmlReader.java, Compiled Code) at org.apache.tomcat.core.ContextManager.initContext(ContextManager.java, Compiled Code) at org.apache.tomcat.core.ContextManager.init(ContextManager.java:201) at org.apache.tomcat.startup.Tomcat.execute(Tomcat.java:156) at org.apache.tomcat.startup.Tomcat.main(Tomcat.java:163) and ERROR reading /home/jsp/forum/WEB-INF/web.xmlAt Illegal character or entity reference syntax. and bash: syntax error near unexpected token `password=test/param-value' apparently is an illegal character. but how do i solve this problem? i've thought of url_encoding this, but that's an ugly sollution. anybody got a better idea? Greets, Sam.
Re: context-param: illegal char
apparently is an illegal character. but how do i solve this problem? i've thought of url_encoding this, but that's an ugly sollution. anybody got a better idea? No, you need to *xml* encode it - use amp; instead of . Jon
RE: context-param: illegal char
Sorroundthe data, with a CDATA tag your web.xml excerpert will look like: context-param param-namedatabase_dsn/param-name param-value![CDATA[jdbc:mysql://localhost/test?user=testpassword=test]]/ param-value /context-param Saludos , Ignacio J. Ortega -Mensaje original- De: Sam Terburg [mailto:[EMAIL PROTECTED]] Enviado el: lunes 11 de diciembre de 2000 11:50 Para: [EMAIL PROTECTED] Asunto: context-param: illegal char with this code in web.xml: context-param param-namedatabase_dsn/param-name param-valuejdbc:mysql://localhost/test?user=testpassword=test/param-valu e /context-param i get this error: Starting tomcat. Check logs/tomcat.log for error messages ERROR reading /home/jsp/forum/WEB-INF/web.xml At Next character must be ";" terminating reference to entity "password". ERROR reading /home/jsp/forum/WEB-INF/web.xml java.lang.NullPointerException at org.apache.tomcat.util.xml.XmlMapper.readXml(XmlMapper.java, Compiled Code) at org.apache.tomcat.context.WebXmlReader.processFile(WebXmlReader.java, Compiled Code) at org.apache.tomcat.context.WebXmlReader.contextInit(WebXmlReader.java, Compiled Code) at org.apache.tomcat.core.ContextManager.initContext(ContextManager.java, Compiled Code) at org.apache.tomcat.core.ContextManager.init(ContextManager.java:201) at org.apache.tomcat.startup.Tomcat.execute(Tomcat.java:156) at org.apache.tomcat.startup.Tomcat.main(Tomcat.java:163) and ERROR reading /home/jsp/forum/WEB-INF/web.xml At Illegal character or entity reference syntax. and bash: syntax error near unexpected token `password=test/param-value' apparently is an illegal character. but how do i solve this problem? i've thought of url_encoding this, but that's an ugly sollution. anybody got a better idea? Greets, Sam.
Re: context-param: illegal char
Thanx, it workes. Sam. - Original Message - From: "Jon Skeet" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Monday, December 11, 2000 11:50 AM Subject: Re: context-param: illegal char apparently is an illegal character. but how do i solve this problem? i've thought of url_encoding this, but that's an ugly sollution. anybody got a better idea? No, you need to *xml* encode it - use amp; instead of . Jon
RE: context-param: illegal char
param-valuejdbc:mysql://localhost/test?user=testpassword=test/param-value I think the character is causing the problem, try replacing it with amp; Regards Nagaraj. -Original Message-From: Sam Terburg [mailto:[EMAIL PROTECTED]]Sent: Monday, December 11, 2000 11:50 AMTo: [EMAIL PROTECTED]Subject: context-param: illegal char with this code in web.xml: context-param param-namedatabase_dsn/param-name param-valuejdbc:mysql://localhost/test?user=testpassword=test/param-value /context-param i get this error: Starting tomcat. Check logs/tomcat.log for error messages ERROR reading /home/jsp/forum/WEB-INF/web.xmlAt Next character must be ";" terminating reference to entity "password". ERROR reading /home/jsp/forum/WEB-INF/web.xmljava.lang.NullPointerException at org.apache.tomcat.util.xml.XmlMapper.readXml(XmlMapper.java, Compiled Code) at org.apache.tomcat.context.WebXmlReader.processFile(WebXmlReader.java, Compiled Code) at org.apache.tomcat.context.WebXmlReader.contextInit(WebXmlReader.java, Compiled Code) at org.apache.tomcat.core.ContextManager.initContext(ContextManager.java, Compiled Code) at org.apache.tomcat.core.ContextManager.init(ContextManager.java:201) at org.apache.tomcat.startup.Tomcat.execute(Tomcat.java:156) at org.apache.tomcat.startup.Tomcat.main(Tomcat.java:163) and ERROR reading /home/jsp/forum/WEB-INF/web.xmlAt Illegal character or entity reference syntax. and bash: syntax error near unexpected token `password=test/param-value' apparently is an illegal character. but how do i solve this problem? i've thought of url_encoding this, but that's an ugly sollution. anybody got a better idea? Greets, Sam.
