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// Test the persistence capabilities of the ACE shared memory manager.
// $Id$
#include "ace/Malloc.h"
typedef ACE_Malloc <ACE_MMAP_MEMORY_POOL, ACE_Null_Mutex> MALLOC;
typedef ACE_Malloc_Iterator <ACE_MMAP_MEMORY_POOL, ACE_Null_Mutex> MALLOC_ITERATOR;
// Shared memory manager.
static MALLOC *shmem_manager = 0;
// Backing store name.
static char *backing_store = ACE_DEFAULT_BACKING_STORE;
class Employee
{
public:
Employee (void): name_ (0), id_ (0) {}
Employee (char* name, u_long id) : id_ (id)
{
this->name_ = (char*) shmem_manager->malloc (ACE_OS::strlen (name) + 1);
ACE_OS::strcpy (this->name_, name );
}
~Employee (void) { shmem_manager->free (this->name_); }
char *name (void) const { return this->name_; }
void name (char* name)
{
if (this->name_)
shmem_manager->free (this->name_);
this->name_ = (char*) shmem_manager->malloc (ACE_OS::strlen (name) + 1);
ACE_OS::strcpy (this->name_, name);
}
u_long id (void) const { return id_; }
void id (u_long id) { id_ = id; }
friend ostream &operator<<(ostream &stream, const Employee &employee)
{
stream << endl;
stream << "Employee name: " << employee.name() << endl;
stream << "Employee id: " << employee.id() << endl;
stream << endl;
return stream;
}
void *operator new (size_t)
{
return shmem_manager->malloc (sizeof (Employee));
}
void operator delete (void *pointer) { shmem_manager->free (pointer); }
private:
char *name_;
// Employee name.
u_long id_;
// Employee ID.
};
class GUI_Handler
{
public:
GUI_Handler (void) { menu(); }
~GUI_Handler (void)
{
MALLOC::MEMORY_POOL &pool = shmem_manager->memory_pool();
pool.sync ();
}
int service(void)
{
char option[BUFSIZ];
char buf1[BUFSIZ];
char buf2[BUFSIZ];
if (::scanf ("%s", option) <= 0)
{
ACE_ERROR ((LM_ERROR, "try again\n"));
return 0;
}
int result = 0;
switch (option[0])
{
case 'I' :
case 'i' :
if (::scanf ("%s %s", buf1, buf2) <= 0)
break;
result = insert_employee (buf1, ACE_OS::atoi (buf2));
break;
case 'F' :
case 'f' :
if (::scanf ("%s", buf1) <= 0)
break;
result = find_employee (buf1);
break;
case 'D' :
case 'd' :
if (::scanf ("%s", buf1) <= 0)
break;
result = delete_employee (buf1);
break;
case 'L' :
case 'l' :
result = list_employees ();
break;
case 'Q' :
case 'q' :
return -1;
break;
default :
cout << "unrecognized command" << endl;
}
if (result == 0)
cout << "Last operation was successful!!" << endl;
else
cout << "Last operation failed!! " << endl;
menu ();
return 0;
}
void menu(void)
{
cout << endl;
cout << "\t************************** " << endl;
cout << "\tThe employee database menu " << endl;
cout << endl;
cout << "\t<I> Insert <name> <id> " << endl;
cout << "\t<D> Delete <name> " << endl;
cout << "\t<F> Find <name> " << endl;
cout << endl;
cout << "\t<L> List all employees " << endl;
cout << endl;
cout << "\t<Q> Quit " << endl;
cout << "\t************************** " << endl;
}
private:
int insert_employee (char* name, u_long id)
{
if (find_employee (name) == 0)
ACE_ERROR_RETURN ((LM_ERROR, "Employee already exists\n"), -1);
Employee* new_employee = new Employee (name, id);
shmem_manager->bind (name, new_employee);
return 0;
}
int find_employee (char* name)
{
void *temp;
if (shmem_manager->find (name, temp) == 0)
{
Employee *employee = (Employee *) temp;
ACE_DEBUG ((LM_DEBUG, "The following employee was found.......\n\n"));
ACE_DEBUG ((LM_DEBUG, "Employee name: %s\nEmployee id: %d\n",
employee->name (), employee->id ()));
return 0;
}
return -1;
}
int list_employees (void)
{
MALLOC_ITERATOR iterator (*shmem_manager);
ACE_DEBUG ((LM_DEBUG, "The following employees were found.......\n\n"));
for (void* temp = 0;
iterator.next (temp) != 0;
iterator.advance ())
{
Employee *employee = (Employee *) temp;
ACE_DEBUG ((LM_DEBUG, "Employee name: %s\nEmployee id: %d\n",
employee->name (), employee->id ()));
}
return 0;
}
int delete_employee (char* name)
{
void *temp;
if (shmem_manager->unbind (name, temp) == 0)
{
Employee *employee = (Employee *) temp;
ACE_DEBUG ((LM_DEBUG,
"The following employee was found and deleted.......\n\n"));
ACE_DEBUG ((LM_DEBUG, "Employee name: %s\nEmployee id: %d\n",
employee->name (), employee->id ()));
delete employee;
return 0;
}
ACE_DEBUG ((LM_DEBUG, "There is no employee with name %s", name));
return -1;
}
};
void
parse_args (int argc, char *argv[])
{
if (argc > 1);
backing_store = argv[1];
}
int
main (int argc, char *argv[])
{
parse_args (argc, argv);
shmem_manager = new MALLOC (backing_store);
GUI_Handler handler;
for(;;)
if (handler.service() == -1)
{
ACE_DEBUG ((LM_DEBUG, "closing down ....\n"));
break;
}
return 0;
}
#if defined (ACE_TEMPLATES_REQUIRE_SPECIALIZATION)
template class ACE_Malloc <ACE_MMAP_MEMORY_POOL, ACE_Null_Mutex>;
template class ACE_Malloc_Iterator <ACE_MMAP_MEMORY_POOL, ACE_Null_Mutex>;
#endif /* ACE_TEMPLATES_REQUIRE_SPECIALIZATION */
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