Thursday, August 26, 2010
JPA and EJB3 Caveats - I
javax.persistence.PersistenceException: [PersistenceUnit: UnitName] class or package not found
WARN [ServiceController] Problem starting service persistence.units:ear=If you get the above warning followed by the exception in the title, check your persistence.xml, some of the entity classes maybe declared wrong (e.g. point to wrong package).
JPA/EJB 3 Setup on Eclipse
Make sure that the persistence.xml file is located in the META-INF of the EAR Project.
Having it in your JPA project does NOT automatically propogate this file to where it needs to be.
Tuesday, August 10, 2010
Quotes
Optimist/Pessimist
The optimist live in the peninsula of infinite possibilities, where as the pessimist is stranded on an island of perpetual indecision.
The optimist live in the peninsula of infinite possibilities, where as the pessimist is stranded on an island of perpetual indecision.
Saturday, May 29, 2010
Virtual Memory arguments for Eclipse
On Windows:
C:\eclipse\eclipse.exe -data c:\MyWorkspace -vmargs -Xms128M -Xmx256M
Workspace location = MyWorkspace
Starting memory = 128 mb
Maximum memory = 256 mb
C:\eclipse\eclipse.exe -data c:\MyWorkspace -vmargs -Xms128M -Xmx256M
Workspace location = MyWorkspace
Starting memory = 128 mb
Maximum memory = 256 mb
Monday, February 15, 2010
C++ Listing all Directories in a Folder.
View the contents of a directory
This is how you get the contents of a directory in Windows with C++.#include#include using namespace std; int main() { WIN32_FIND_DATA FindFileData; HANDLE hFind = INVALID_HANDLE_VALUE; char DirSpec[MAX_PATH]; // directory specification cout<<"Path: "; cin.get(DirSpec, MAX_PATH); cout<<"\n"; strncat(DirSpec, "\\*", 3); hFind = FindFirstFile(DirSpec, &FindFileData); if(hFind == INVALID_HANDLE_VALUE) { cout<<"Error: invalid path\n"; } cout< <<"\n"; while(FindNextFile(hFind, &FindFileData) != 0) { cout< <<"\n"; } FindClose(hFind); return 0; }
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