public void create() throws HyracksDataException {
synchronized (lcManager) {
long resourceID = getResourceID();
index = lcManager.getIndex(resourceID);
if (index != null) {
lcManager.unregister(resourceID);
} else {
index = createIndexInstance();
}
// The previous resource ID needs to be removed since calling IIndex.create() may possibly
// destroy
// any physical artifact that the LocalResourceRepository is managing (e.g. a file containing
// the resource ID).
// Once the index has been created, a new resource ID can be generated.
if (resourceID != -1) {
localResourceRepository.deleteResourceByName(file.getFile().getPath());
}
index.create();
try {
// TODO Create LocalResource through LocalResourceFactory interface
resourceID = resourceIdFactory.createId();
ILocalResourceFactory localResourceFactory =
opDesc.getLocalResourceFactoryProvider().getLocalResourceFactory();
localResourceRepository.insert(
localResourceFactory.createLocalResource(
resourceID, file.getFile().getPath(), partition));
} catch (IOException e) {
throw new HyracksDataException(e);
}
lcManager.register(resourceID, index);
}
}
public void destroy() throws HyracksDataException {
synchronized (lcManager) {
long resourceID = getResourceID();
index = lcManager.getIndex(resourceID);
if (index != null) {
lcManager.unregister(resourceID);
} else {
index = createIndexInstance();
}
if (resourceID != -1) {
localResourceRepository.deleteResourceByName(file.getFile().getPath());
}
index.destroy();
}
}
public void open() throws HyracksDataException {
synchronized (lcManager) {
long resourceID = getResourceID();
if (resourceID == -1) {
throw new HyracksDataException(
"Index does not have a valid resource ID. Has it been created yet?");
}
index = lcManager.getIndex(resourceID);
if (index == null) {
index = createIndexInstance();
lcManager.register(resourceID, index);
}
lcManager.open(resourceID);
}
}
public void close() throws HyracksDataException {
synchronized (lcManager) {
lcManager.close(getResourceID());
}
}