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None of the <copy> task declarations are particularly complex, but they do add up. With the WAR file now available as a directory, all we need to do to deploy to the server is: Unload any existing version of the application. Point the application at the new one. Once Tomcat has installed the application, it should keep an eye on the file timestamps and reload things if they change, but we prefer to restart applications for a more rigorous process. A clean restart is, well, cleaner. We could actually issue the reload command to the management servlet and have the reload done, but we are choosing to not differentiate between the application not installed and application already installed states, and always force the installation of our application. This keeps the build file simpler. First, a few up-front definitions are needed, such as the name of the web application, the port the server is running on, and the logon details:
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<property <property <property <property name="webapp.name" value="antbook"/> name="catalina.port" value="8080" /> name="catalina.username" value="admin" /> name="catalina.password" value="password" />
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We should really keep the passwords outside the build file; we certainly will for more sensitive boxes. The remove-local-catalina target uninstalls the existing copy by sending the application path to the management servlet:
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<target name="remove-local-catalina"> <fail unless="env.CATALINA_HOME" message="Tomcat 4 not found" /> <property name="deploy.local.remove.url" value= "http://localhost:${catalina.port}/manager/remove" /> <get src="${deploy.local.remove.url} path=/${webapp.name}" dest="deploy-local-remove.txt" username="admin" password="password" /> <loadfile property="deploy.local.remove.result" srcFile="deploy-local-remove.txt"/> <echo>${deploy.local.remove.result}</echo> </target>
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Running this target produces the message that Tomcat removed the application, after which a new installation succeeds:
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remove-local-catalina: [get] Getting: http://localhost:8080/manager/remove path=/antbook [echo] OK - Removed application at context path /antbook
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LOCAL DEPLOYMENT TO TOMCAT 4.X
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Calling the target twice in a row reveals that a second call generates a FAIL message, but as Ant does not interpret the response, the build continues. Only if the local server is not running, or the username or password is incorrect, does the <get> request break the build. This means that the deployment target can depend on removing the web application without a <condition> test to see if the web application is actually there and hence in need of removal. Once the old version is unloaded, it is time to install the new application. We do this with a target that calls management servlet s install URL:
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<target name="deploy-local-catalina" depends="makewar,remove-local-catalina" > <property name="deploy.local.urlpath" value="file:///${ warfile.asdir}/" /> <property name="deploy.local.url.params" value= "path=/${webapp.name}&war=${deploy.local.urlpath}" /> <property name="deploy.local.url" value= "http://localhost:${catalina.port}/manager/install" /> <get src="${deploy.local.url} ${deploy.local.url.params}" dest="deploy-local.txt" username="${catalina.username}" password="${catalina.password}" /> <loadfile property="deploy.local.result" srcFile="deploy-local.txt"/> <echo>${deploy.local.result}</echo> </target>
Because of its predecessors, invoking this target will create the WAR file image and remove any existing application instance, before installing the new version:
makewar: [copy] Copying 1 file to C:\AntBook\app\webapp\dist\antbook [zip] Building zip: C:\AntBook\app\webapp\dist\antbook.war remove-local-catalina: [get] Getting: http://localhost:8080/manager/remove path=/antbook [echo] FAIL - No context exists for path /antbook deploy-local-catalina: [get] Getting: http://localhost:8080/manager/install path=/antbook &war=file:///C:\AntBook\app\webapp\dist\antbook/ [echo] OK - Installed application at context path /antbook BUILD SUCCESSFUL
DEPLOYMENT
In three targets, we have live deployment to a local Tomcat server. This allows us to check this deployment problem off as complete.
REMOTE DEPLOYMENT TO TOMCAT
Tomcat 4.x is installed on a remote server. The build file must deploy the WAR file it creates to this server. This is simply an extension of the previous problem. If you can deploy locally, then you can deploy remotely; all you need is a bit of remote access. The management interface of Tomcat works remotely, so the only extra work is the file copy to the server. This can be done with <ftp>, or by using <copy> if the client can mount the remote server s disk drive. Using FTP, the expanded WAR file can be copied up in one task declaration:
<target name="ftp-warfile" depends="makewar" if="ftp.login" > <ftp server="${target.server}" remotedir="${ftp.remotedir}" userid="${ftp.login}" password="${ftp.password}" depends="true" binary="true" verbose="true" ignoreNoncriticalErrors="true" > <fileset dir="${warfile.asdir}" /> </ftp> </target>
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