Hello,
I am able to successfully generate ORM code from an ERD with caching disabled as discussed here: http://forums.visual-paradigm.com/posts/list/2212.html
The sample code generated works as expected.
When I enable caching the sample programs function as they should, but produce the following warnings:
19:04:15,656 WARN EhCacheProvider:86 - Could not find configuration [hibernate.test.com.arkadias.idemo.orm.IDemoName]; using defaults.
19:04:15,809 WARN EhCacheProvider:86 - Could not find configuration [hibernate.test.org.hibernate.cache.UpdateTimestampsCache]; using defaults.
19:04:15,812 WARN EhCacheProvider:86 - Could not find configuration [hibernate.test.org.hibernate.cache.StandardQueryCache]; using defaults.
My environment is as follows:
VP-UML Professional Version 6.0 (Build sp2_20070526)
OS: Mac OS X Version 10.4.9 - 2 GB Ram
A step-by-step procedure to reproduce this issue:
===============================================
ORM code generated from ERD
Notes:
{workspace_dir} is Eclipse workspace, home to all Eclipse projects
e.g. /Users/glen/Documents/Eclipse/
{project_dir} is the home directory for current project
e.g. {workspace_dir}/com.arkadias.idemo/
===============================================
1. Create a new Eclipse project
- Create new project in Eclipse: File/New/Project/Java Project
- Project name: com.arkadias.idemo
- Contents: Create new project in workspace
- JRE: use default JRE...
- Project layout: Create separate source and output folders
- {project_dir} is created as: {workspace_dir}/com.arkadias.idemo
2. Install JDBC driver jar
- Create {project_dir}/lib
- Copy JDBC driver jar here
- Add JDBC driver jar to Build Path
3. Create Entity Relationship Diagram
- Create new ER diagram in VP-UML
- Assign tables, columns and data types on ERD
4. Create Class diagram from ER diagram
- Create Class diagram from ER diagram
- Tools/Object-Relational Mapping (ORM)/Synchronize to Class Diagram
- Assign <<ORM Persistable>> stereotype as needed
- Assign package to ORM Class Diagram e.g. com.arkadias.idemo.orm
5. Create database and persistable objects (ORM) from ERD
- Create database manually (if needed) e.g. database name idemo
- Generate Code and Database from ERD
- Tools/Object-Relational Mapping (ORM)/Wizards
- Welcome page
- Language: Java
- Wizards: Generate Code and Database from ERD
- Class Details Configuration page
- Package: Leave Blank - VP-UML picks up "com.arkadias.idemo.orm" from Class Diagram
- Database Configuration page
- Driver file: {project_dir}/com.arkadias.idemo/lib/com.mysql-connector-java-5.0.4-bin.jar
- Provide Connection URL and User data as appropriate
- Confirm Test Connection passes
- Generate Code page
- Error Handling: Throw PesistentException
- Exception Handling: Print to log4j
- Default Lazy Collection Initialization: Lazy for small data set, Extra for large
- Mapping Type: Annotation
- Output Path: {project_dir} e.g. /Users/glen/Documents/Eclipse/com.arkadias.idemo/
- Deploy to: (as appropriate for target system) e.g. Standalone Application
- Association Handling: Smart (handles both side of 1 - many updates)
- Persistent API: Factory Class
- Generate Criteria: Check (generates criteria (query) objects)
- Serializable: Check
*** - Cache Options: EHCache
- With default settings
- Cache Options/Classes Cache Configuration
- Name: com.arkadias.idemo.orm.IDemoName
- Cache: Read-Only
- Select Optional Jar: (default)
- Advance Settings: (default)
- Samples: Samples only (generates ORM usage sample code)
- Scripts: None
- Finish to generate Code
- Add {project_dir}/lib/annotations.jar and orm.jar to Build Path
7. Test generated ORM classes
Sample code execution
- CreateIDemoData.java - Perform as expected, but with warning ***
- DeleteIDemoData.java - Perform as expected, but with warning ***
- ListIDemoData.java - Perform as expected, but with warning ***
- RetrieveAndUpdateIDemoData.java - Perform as expected, but with warning ***
*** No warning message is displayed with cache disabled
{project_dir}/src/ehcache.xml contains:
<ehcache>
<diskStore path="java.io.tmpdir"/>
<defaultCache maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="120"
timeToLiveSeconds="120"
overflowToDisk="true"/>
</ehcache>
Based on information at http://www.developer.com/open/print.php/10930_3559931_4, (see Configuring EHCache) I added custom cache blocks for each warning message:
Could not find configuration [hibernate.test.com.arkadias.idemo.orm.IDemoName]
Could not find configuration [hibernate.test.org.hibernate.cache.UpdateTimestampsCache]
Could not find configuration [hibernate.test.org.hibernate.cache.StandardQueryCache]
That resolved the problem. Everything seems to be working as it should.
The corrected {project_dir}/src/ehcache.xml contains:
<ehcache>
<diskStore path="java.io.tmpdir"/>
<defaultCache maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="120"
timeToLiveSeconds="120"
overflowToDisk="true"/>
<cache name="hibernate.test.com.arkadias.idemo.orm.IDemoName"
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="120"
timeToLiveSeconds="120"
overflowToDisk="true"/>
<cache name="hibernate.test.org.hibernate.cache.UpdateTimestampsCache"
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="120"
timeToLiveSeconds="120"
overflowToDisk="true"/>
<cache name="hibernate.test.org.hibernate.cache.StandardQueryCache"
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="120"
timeToLiveSeconds="120"
overflowToDisk="true"/>
</ehcache>
It would be nice to add this extended configuration of ehcache.xml as the default produced by VP-UML, or at least mention the need to edit ehcache.xml in the documentation.
Best regards,
-Glen
