/**
* Load log and rebuild KVServer by iterating over log entries. You do not need to restore the
* previous cache state (i.e. ignore GETS).
*
* @throws KVException if an error occurs in KVServer (though we expect none)
*/
public void rebuildServer() throws KVException {
// implement me
try {
loadFromDisk();
kvServer.wipeEverything();
KVMessage request = null;
for (KVMessage log : entries) {
if (log.getMsgType().equals(PUT_REQ) || log.getMsgType().equals(DEL_REQ)) {
request = log;
} else if (log.getMsgType().equals(COMMIT)) {
if (request == null) {
// Do nothing. If reached here, repeated COMMIT
continue;
} else if (request.getMsgType().equals(PUT_REQ)) {
kvServer.put(request.getKey(), request.getValue());
} else if (request.getMsgType().equals(DEL_REQ)) {
kvServer.del(request.getKey());
}
} else if (log.getMsgType().equals(ABORT)) {
request = null;
}
}
} catch (Exception e) {
// throw new KVException("Error: Rebuild failed");
}
}
/**
* Load log and rebuild KVServer by iterating over log entries. You do not need to restore the
* previous cache state (i.e. ignore GETS).
*
* @throws KVException if an error occurs in KVServer (though we expect none)
*/
public void rebuildServer() throws KVException {
KVMessage interruptedTPCOperation = null;
loadFromDisk();
for (int i = 0; i < entries.size(); i++) {
// System.out.println("rebuild server " + i);
KVMessage entry = entries.get(i);
String msgType = entry.getMsgType();
if (msgType.equals("putreq") || msgType.equals("delreq")) {
interruptedTPCOperation = entry;
continue;
}
if (msgType.equals("commit") && interruptedTPCOperation != null) {
if (interruptedTPCOperation.getMsgType().equals("delreq")) {
kvServer.del(interruptedTPCOperation.getKey());
} else if (interruptedTPCOperation.getMsgType().equals("putreq")) {
kvServer.put(interruptedTPCOperation.getKey(), interruptedTPCOperation.getValue());
}
interruptedTPCOperation = null;
} else if (msgType.equals("abort")) {
interruptedTPCOperation = null;
}
}
}