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| <h1>Validation Tool |
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| |
| <p><a name="ValidationTool-NAME"></a></p> |
| |
| <h1>NAME</h1> |
| |
| <p>openejb validate - OpenEJB Validation Tool</p> |
| |
| <p><a name="ValidationTool-SYNOPSIS"></a></p> |
| |
| <h1>SYNOPSIS</h1> |
| |
| <p>openejb validate <a href="options.html">options</a> |
| jarfiles</p> |
| |
| <p><a name="ValidationTool-NOTE"></a></p> |
| |
| <h1>NOTE</h1> |
| |
| <p>The OpenEJB Validation tool must be executed from the OPENEJB_HOME |
| directory. This is the directory where OpenEJB was installed or unpacked. |
| For for the remainder of this document we will assume you unpacked OpenEJB |
| into the directory C:\openejb.</p> |
| |
| <p>In Windows, the validation tool can be executed as follows:</p> |
| |
| <p><em>C:\openejb> openejb validate -help</em></p> |
| |
| <p><div class="warning">} |
| There is a bug in the openejb.bat script of OpenEJB 0.9.0 that doesn't |
| allow you to execute the validate command as above. For that release, |
| Windows users can execute the following command: |
| <em>C:\openejb> bin\validate.bat -help</em> |
| <div class="warning">}</p> |
| |
| <p>In UNIX, Linux, or Mac OS X, the deploy tool can be executed as follows:</p> |
| |
| <p>`<a href="user@host-openejb.html">user@host openejb</a></p> |
| |
| <h1>./openejb.sh validate -help`</h1> |
| |
| <p>Depending on your OpenEJB version, you may need to change execution bits to |
| make the scripts executable. You can do this with the following command.</p> |
| |
| <p>`<a href="user@host-openejb.html">user@host openejb</a></p> |
| |
| <h1>chmod 755 openejb.sh bin/*.sh`</h1> |
| |
| <p>From here on out, it will be assumed that you know how to execute the right |
| openejb script for your operating system and commands will appear in |
| shorthand as show below.</p> |
| |
| <p><em>openejb validate -help</em></p> |
| |
| <p><a name="ValidationTool-DESCRIPTION"></a></p> |
| |
| <h1>DESCRIPTION</h1> |
| |
| <p>The validation tool currently checks for the following things: |
| * Does the Jar have all the ejb-class class files |
| * Does the Jar have all the home class files |
| * Does the Jar have all the remote class files |
| * Is the ejb-class a sub-interface of SessionBean or EntityBean |
| * Is the home a sub-interface of EJBHome |
| * Is the remote a sub-interface of EJBObject |
| * Are all the methods in the remote interface implemented in the ejb-class |
| * Are there create methods in the home interface |
| * Are the create methods in the home interface implemented in the ejb-class |
| * Are the required post create methods in the ejb-class of EntityBeans |
| * Are there any create methods in the ejb-class, but not in the home |
| interface</p> |
| |
| <p>More checks will be added in the future.</p> |
| |
| <p><a name="ValidationTool-OPTIONS"></a></p> |
| |
| <h1>OPTIONS</h1> |
| |
| <table> |
| <tr><td>-v</td><td>Sets the output level to 1. This will output just the minumum details |
| on each failure.</td></tr> |
| <tr><td>-vv</td><td>Default. Sets the output level to 2. Outputs one line summaries of |
| each failure. This is the default output level.</td></tr> |
| <tr><td>-vvv</td><td>Sets the output level to 3. Outputs verbose details on each failure, |
| usually with details on how to correct the failures.</td></tr> |
| <tr><td>-xml</td><td>Outputs information in well-formed XML.</td></tr> |
| <tr><td>-nowarn</td><td>Suppresses warnings.</td></tr> |
| <tr><td>-version</td><td>Print the version.</td></tr> |
| <tr><td>-help</td><td>Print this help message.</td></tr> |
| <tr><td>-examples</td><td>Show examples of how to use the options.</td></tr> |
| </table> |
| |
| <p><a name="ValidationTool-COMMONISSUES"></a></p> |
| |
| <h1>COMMON ISSUES</h1> |
| |
| <p><a name="ValidationTool-MisslocatedclassorNoClassDefFoundError"></a></p> |
| |
| <h2>Misslocated class or NoClassDefFoundError</h2> |
| |
| <p>The short explanation is that the parent doesn't have all the classes it |
| needs as some of them are only in the child classloader, where the parent |
| can't see them.</p> |
| |
| <p>This would occur, for example, if a class was loaded by the parent |
| classloader, but that class' superclass wasn't visible to the parent |
| classloader, perhaps because it is only in the child classloader.</p> |
| |
| <p>Here is a more concrete example:</p> |
| |
| <pre><code>public interface Person extends EJBObject { |
| } |
| |
| public interface Employee extends Person { |
| } |
| </code></pre> |
| |
| <p>Ok, so when we build our ejb jar, we put both the Person and Employee |
| interfaces in the jar, so everything should be good (so we think). But now |
| let's say that for some reason the Employee interface is also in another |
| jar and that jar was loaded into the system classpath.</p> |
| |
| <p>When a new classloader is create for my ejb-jar at runtime and the system |
| attempts to load the Employee interface, the call goes right through that |
| classloader and down to the system classloader. The Employee interface is |
| found, because it was accidentally added to that extra jar in the system |
| classpath. So now the system classloader goes looking for Employee's |
| superinterface, Person, where it immediatly blows up and throws a |
| NoClassDefFoundError: Person.</p> |
| |
| <p>Most people will look at their ejb-jar and think, "But all my classes are |
| there!?", which is true. It really doesn't matter though, because one of |
| those classes is also in the parent classloader. The first call to load |
| that class will bypass your classloader completely and go to the parent. |
| Once there, it is the parent's job to find <em>all</em> the dependent classes. If |
| it can't ... NoClassDefFoundError.</p> |
| |
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