J2EE stuff

J2EE-STUFF.txt

J2EE STUFF

=== JMX ===

===========

=== MAVEN ===
1. use plugin short name:
  add following content in ~/.m2/settings.xml:
  <profile>
    <pluginGroups>
      <pluginGroup>org.mortbay.jetty</pluginGroup>
  	</pluginGroups>
  </profile>

2. generate project based on sample project:
   cmd: mvn archetype:generate
   then add filter strings.

3. run main class use exec plugin:
   mvn exec:java -Dexec.mainClass="cn.klzhong.App" [-Dexec.args="arg1" ...]

4. download sources of a specific dependency:
   mvn dependency:sources -DincludeGroupIds=javax.validation

5. skip test: mvn isntall -Dmaven.test.skip=true

6: deploy jar to nexus use maven command: e.g.
   mvn deploy:deploy-file -DgroupId=com.lianlian.platform
       -DartifactId=serviceEncryptor
       -Dversion=1.0
       -Dpackaging=jar
       -Dfile=./serviceEncryptor-1.0.jar
       -DrepositoryId=releases
       -Durl=http://192.168.88.8:8081/nexus/content/repositories/releases/

7: run single test(test method):
   mvn -Dtest=TestCircle#xyz test //where TestCircle is the test class name and xyz is the test method
   
------ maven errors: ------
1) can not generate class file in target dir:
   recheck package declare in your source files.

2) annotation error: make sure you have imported the annotation type.

3) Failed to execute goal on project booking-mvc: Could not resolve dependencies for project org.springframework.webflow.samples:booking-mvc:war:1.0.0.BUILD-SNAPSHOT: Failure to find org.springframework.webflow:spring-js-resources:jar:2.4.2.BUILD-20150605.020814-7 in http://192.168.88.8:8081/nexus/content/groups/public was cached in the local repository, resolution will not be reattempted until the update interval of public has elapsed or updates are forced:
    use -U to force update: e.g.  mvn -U tomcat7:run
=============

=== GRADLE ===
1. exclude jars in dependency:
   configurations {
     runtime.exclude group: 'com.sun.jdmk', module: 'jmxtools'
     runtime.exclude group: 'com.sum.jmx', module: 'jmxri'
   }

2. build with error: invalid source release: 1.7
   turns out i set a JAVA_HOME enviroment variable to a JDK1.6 in .bashrc,
   so my gradle1.8 use its jvm, then it can not support java 1.7.
   delete JAVA_HOME env variable, and everything goes fine.

3. run a single unit test:
   gradle -Dtest.single=TEST_CLASS_NAME test

4. gradle help system:
   1) command help: gradle --help
   2) help task: gradle help --task taskName. e.g. gradle help --task help
   3) list tasks: gradle tasks.

5. show dependencies for specific scope:
   gradle dependencies --configure scopeName
   hint: use gradle help --task dependencies for task infomation.

6. skip test: -x test
   e.g. gradle build -x test
==============


==== spring ====
--- spring mvc 
1) If you use Spring 3, you can distinguish between controller methods using params at  tribute:

  <input type = "submit" name = "next" value = "Next" />
  <input type = "submit" name = "back" value = "Back" />

  @RequestMapping(..., params = "next")
  public ModelAndView next(...) { ... }

  @RequestMapping(..., params = "back")
  public ModelAndView back(...) { ... }
================

==== JBOSS ====
### install jboss-7.1 on ubuntu 13.04 ###
1) download jboss:
   wget http://download.jboss.org/jbossas/7.1/jboss-as-7.1.1.Final/jboss-as-7.1.1.Final.zip
2) unzip:
   sudo unzip jboss-as-7.1.1.Final.zip -d /usr/share/

3) for security reasons, create a new user to run jboss:
   sudo adduser jboss
4) sudo chown -fR jboss.jboss /usr/share/jboss-as-7.1.1.Final/
5) su - jboss
6) add management user:
   cd /usr/share/jboss-as-7.1.1.Final/bin
   ./add-user.sh

===============

==== TOMCAT ====
1. enable ssl for tomcat:
   1) create keystore file: keytool -genkey -alias tomcat -keyalg RSA
   2) Uncomment the "SSL HTTP/1.1 Connector" entry in $CATALINA_BASE/conf/server.xml

2. Installing a Certificate from a Certificate Authority：
   1) Create a local Certificate Signing Request (CSR):
      a) Create a local self-signed Certificate:
         keytool -genkey -alias tomcat -keyalg RSA -keystore <your_keystore_filename>
      b) The CSR is then created with:
         keytool -certreq -keyalg RSA -alias tomcat -file certreq.csr -keystore <your_keystore_filename>
   2) Importing the Certificate:
      

3. modify conf/server.xml:
   <Connector port="8443" protocol="org.apache.coyote.http11.Http11Protocol"
              maxThreads="150" SSLEnabled="true" scheme="https" secure="true"
              clientAuth="false" sslProtocol="TLS" keystoreFile="/Users/klzhong/.keystore"
              keystorePass="changeit" truststoreFile="/Users/klzhong/security/cacerts" />

================

==== CAS SSO ====
1. Generating a certificate:
   1) keytool -delete -alias tomcat -keypass changeit

   2) keytool -genkey -alias tomcat -keypass changeit -keyalg RSA

   3) keytool -export -alias tomcat -keypass changeit  -file server.crt

   4) keytool -import -file server.crt -keypass changeit -keystore $JAVA_HOME/jre/lib/security/cacerts
      -- keytool error: java.lang.Exception: Certificate not imported, alias <mykey> already exists:
         -- delete mykey in cacerts:
         keytool -delete -alias mykey -keystore /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/security/cacerts

=================