Hi all,
     I`m working on project called unicorn, Follow this link http://code.w3.org/unicorn/wiki/Documentation/Install this is how I execute unicorn on http://localhost:8080/.
Instead of executing unicorn on a web browser I want to execute it as console version or making it as console application.
I want to write a code which allows me to access main class of unicorn from the command line or How to interact with the tomcat from command line.

I also tried this and got errors,
goten@MetalBig:/media/Netpad/unicorn/unicorn$ ant retrieve generate_observer generate_tasklist default_conf jar
Buildfile: build.xml

retrieve:
[ivy:retrieve] :: Ivy 2.2.x-local-20100818095649 - 20100818095649 :: http://ant.apache.org/ivy/ ::
[ivy:retrieve] :: loading settings :: url = jar:file:/usr/share/ant/lib/ivy.jar!/org/apache/ivy/core/settings/ivysettings.xml
[ivy:retrieve] :: resolving dependencies :: org.w3c#unicorn;working@MetalBig
[ivy:retrieve]  confs: [default]
[ivy:retrieve]  found javax.servlet#servlet-api;2.5 in public
[ivy:retrieve]  found commons-collections#commons-collections;3.2.1 in public
[ivy:retrieve]  found commons-fileupload#commons-fileupload;1.2.1 in public
[ivy:retrieve]  found portlet-api#portlet-api;1.0 in public
[ivy:retrieve]  found commons-io#commons-io;1.4 in public
[ivy:retrieve]  found commons-lang#commons-lang;2.5 in public
[ivy:retrieve]  found commons-logging#commons-logging;1.1.1 in public
[ivy:retrieve]  found log4j#log4j;1.2.12 in public
[ivy:retrieve]  found logkit#logkit;1.0.1 in public
[ivy:retrieve]  found avalon-framework#avalon-framework;4.1.3 in public
[ivy:retrieve]  found javax.mail#mail;1.4.1 in public
[ivy:retrieve]  found javax.activation#activation;1.1 in public
[ivy:retrieve]  found com.yahoo.platform.yui#yuicompressor;2.3.6 in public
[ivy:retrieve]  found org.apache.velocity#velocity;1.6.4 in public
[ivy:retrieve]  found oro#oro;2.0.8 in public
[ivy:retrieve]  found jdom#jdom;1.0 in public
[ivy:retrieve]  found logkit#logkit;2.0 in public
[ivy:retrieve]  found ant#ant;1.6 in public
[ivy:retrieve]  found werken-xpath#werken-xpath;0.9.4 in public
[ivy:retrieve]  found org.apache.velocity#velocity-tools;2.0 in public
[ivy:retrieve]  found commons-beanutils#commons-beanutils;1.7.0 in public
[ivy:retrieve]  found commons-digester#commons-digester;1.8 in public
[ivy:retrieve]  found commons-chain#commons-chain;1.1 in public
[ivy:retrieve]  found commons-validator#commons-validator;1.3.1 in public
[ivy:retrieve]  found dom4j#dom4j;1.1 in public
[ivy:retrieve]  found sslext#sslext;1.2-0 in public
[ivy:retrieve]  found org.apache.struts#struts-core;1.3.8 in public
[ivy:retrieve]  found antlr#antlr;2.7.2 in public
[ivy:retrieve]  found org.apache.struts#struts-taglib;1.3.8 in public
[ivy:retrieve]  found org.apache.struts#struts-tiles;1.3.8 in public
[ivy:retrieve]  found org.apache.xmlbeans#xmlbeans;2.4.0 in public
[ivy:retrieve]  found stax#stax-api;1.0.1 in public
[ivy:retrieve] :: resolution report :: resolve 1826ms :: artifacts dl 173ms
[ivy:retrieve]  :: evicted modules:
[ivy:retrieve]  javax.servlet#servlet-api;2.4 by [javax.servlet#servlet-api;2.5] in [default]
[ivy:retrieve]  commons-io#commons-io;1.3.2 by [commons-io#commons-io;1.4] in [default]
[ivy:retrieve]  logkit#logkit;1.0.1 by [logkit#logkit;2.0] in [default]
[ivy:retrieve]  javax.servlet#servlet-api;2.3 by [javax.servlet#servlet-api;2.5] in [default]
[ivy:retrieve]  commons-lang#commons-lang;2.4 by [commons-lang#commons-lang;2.5] in [default]
[ivy:retrieve]  commons-logging#commons-logging;1.1 by [commons-logging#commons-logging;1.1.1] in [default]
[ivy:retrieve]  commons-logging#commons-logging;1.0.3 by [commons-logging#commons-logging;1.1.1] in [default]
[ivy:retrieve]  commons-digester#commons-digester;1.6 by [commons-digester#commons-digester;1.8] in [default]
[ivy:retrieve]  commons-collections#commons-collections;3.2 by [commons-collections#commons-collections;3.2.1] in [default]
[ivy:retrieve]  commons-logging#commons-logging;1.0.4 by [commons-logging#commons-logging;1.1.1] in [default]
[ivy:retrieve]  org.apache.velocity#velocity;1.6.2 by [org.apache.velocity#velocity;1.6.4] in [default]
[ivy:retrieve]  commons-lang#commons-lang;2.2 by [commons-lang#commons-lang;2.5] in [default]
---------------------------------------------------------------------
|                  |            modules            ||   artifacts   |
|       conf       | number| search|dwnlded|evicted|| number|dwnlded|
---------------------------------------------------------------------
|      default     |   43  |   0   |   0   |   12  ||   31  |   0   |
---------------------------------------------------------------------
[ivy:retrieve] :: retrieving :: org.w3c#unicorn
[ivy:retrieve]  confs: [default]
[ivy:retrieve]  31 artifacts copied, 0 already retrieved (9672kB/656ms)

generate_observer:
  [xmlbean] Time to build schema type system: 1.452 seconds
  [xmlbean] Time to generate code: 0.842 seconds
  [xmlbean] Compiling 154 source files to /tmp/xbean8588899213160360142.d/classes
  [xmlbean] Time to compile code: 7.614 seconds
  [xmlbean] Building jar: /media/Netpad/unicorn/unicorn/lib/unicorn-response.jar

generate_tasklist:
  [xmlbean] Time to build schema type system: 0.899 seconds
  [xmlbean] Time to generate code: 0.108 seconds
  [xmlbean] Compiling 36 source files to /tmp/xbean8538209884522555853.d/classes
  [xmlbean] Time to compile code: 1.941 seconds
  [xmlbean] Building jar: /media/Netpad/unicorn/unicorn/lib/unicorn-tasklist.jar

default_conf:
     [copy] Copying 9 files to /media/Netpad/unicorn/unicorn/build/classes

compile:
    [javac] Compiling 99 source files to /media/Netpad/unicorn/unicorn/build/classes
    [javac] /media/Netpad/unicorn/unicorn/src/org/w3c/unicorn/contract/WADLUnmarshallerXPath.java:34: warning: com.sun.org.apache.xpath.internal.jaxp.XPathFactoryImpl is Sun proprietary API and may be removed in a future release
    [javac] import com.sun.org.apache.xpath.internal.jaxp.XPathFactoryImpl;
    [javac]                                              ^
    [javac] /media/Netpad/unicorn/unicorn/src/org/w3c/unicorn/contract/WADLUnmarshallerXPath.java:145: warning: com.sun.org.apache.xpath.internal.jaxp.XPathFactoryImpl is Sun proprietary API and may be removed in a future release
    [javac]  this.aXPath = new XPathFactoryImpl().newXPath();
    [javac]                    ^
    [javac] Note: /media/Netpad/unicorn/unicorn/src/org/w3c/unicorn/util/UCNProperties.java uses unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
    [javac] 2 warnings

jar:
    [mkdir] Created dir: /media/Netpad/unicorn/unicorn/dist

BUILD FAILED
/media/Netpad/unicorn/unicorn/build.xml:78: Manifest file: /media/Netpad/unicorn/unicorn/WebContent/META-INF/Manifest.MF does not exist.

Total time: 21 seconds
goten@MetalBig:/media/Netpad/unicorn/unicorn$ 

--
Cheers,
Ranjith Kumar.K
http://ranjithtenz.wordpress.com