/** Execute the DROP CLASS. */
public Object execute(final Map<Object, Object> iArgs) {
if (className == null) {
throw new OCommandExecutionException(
"Cannot execute the command because it has not been parsed yet");
}
final ODatabaseDocument database = getDatabase();
if (ifExists && !database.getMetadata().getSchema().existsClass(className)) {
return true;
}
final OClass cls = database.getMetadata().getSchema().getClass(className);
if (cls == null) {
return null;
}
final long records = cls.count(true);
if (records > 0 && !unsafe) {
// NOT EMPTY, CHECK IF CLASS IS OF VERTEX OR EDGES
if (cls.isSubClassOf("V")) {
// FOUND VERTEX CLASS
throw new OCommandExecutionException(
"'DROP CLASS' command cannot drop class '"
+ className
+ "' because it contains Vertices. Use 'DELETE VERTEX' command first to avoid broken edges in a database, or apply the 'UNSAFE' keyword to force it");
} else if (cls.isSubClassOf("E")) {
// FOUND EDGE CLASS
throw new OCommandExecutionException(
"'DROP CLASS' command cannot drop class '"
+ className
+ "' because it contains Edges. Use 'DELETE EDGE' command first to avoid broken vertices in a database, or apply the 'UNSAFE' keyword to force it");
}
}
database.getMetadata().getSchema().dropClass(className);
if (records > 0 && unsafe) {
// NOT EMPTY, CHECK IF CLASS IS OF VERTEX OR EDGES
if (cls.isSubClassOf("V")) {
// FOUND VERTICES
if (unsafe)
OLogManager.instance()
.warn(
this,
"Dropped class '%s' containing %d vertices using UNSAFE mode. Database could contain broken edges",
className,
records);
} else if (cls.isSubClassOf("E")) {
// FOUND EDGES
OLogManager.instance()
.warn(
this,
"Dropped class '%s' containing %d edges using UNSAFE mode. Database could contain broken vertices",
className,
records);
}
}
return true;
}
public Object jsFunction_countClass(String name) {
long count = 0;
OClass cls = getDb().getMetadata().getSchema().getClass(name);
if (cls != null) count = cls.count();
return toJS(count);
}
@Override
public long getDistributedTimeout() {
final OClass cls = getDatabase().getMetadata().getSchema().getClass(className);
if (className != null && cls != null)
return OGlobalConfiguration.DISTRIBUTED_COMMAND_QUICK_TASK_SYNCH_TIMEOUT.getValueAsLong()
+ (2 * cls.count());
return OGlobalConfiguration.DISTRIBUTED_COMMAND_QUICK_TASK_SYNCH_TIMEOUT.getValueAsLong();
}