@Override
public RFile readFile(String filename) throws SystemException, TException {
if (fileStoreMap.get(filename) != null) {
String content = fileStoreMap.get(filename);
RFileMetadata rFileMetadata = new RFileMetadata();
rFileMetadata.setFilename(filename);
RFile rFile = new RFile();
rFile.setMeta(rFileMetadata);
rFile.setContent(content);
return rFile;
} else {
SystemException systemException = new SystemException();
systemException.setMessage("File does not exist");
throw systemException;
}
}
@Override
public TwoPhaseCommitMessage deleteFile(String filename, TwoPhaseCommitMessage tpcm)
throws SystemException, TException {
if (tpcm.getMessage().equals("vote_request")) {
File file = new File(filename);
if (!file.exists()) {
SystemException systemException = new SystemException();
systemException.setMessage("File does not exist");
throw systemException;
}
if (knowConcurrencyStatus(filename)) {
tpcm.setMessage("vote_abort");
createLogEntry(tpcm, null, "delete");
return tpcm;
} else {
createLogEntry(tpcm, null, "delete");
}
System.out.println("****deleteFile TEST CASES****");
System.out.println("1. reply vote_commit for " + filename);
System.out.println("2. reply vote_commit for " + filename + " and crash");
System.out.println("3. reply vote_abort for " + filename);
System.out.println("Enter choice: ");
Scanner sc = new Scanner(System.in);
int choice = sc.nextInt();
switch (choice) {
case 1:
tpcm.setMessage("vote_commit");
updateLogEntry(tpcm);
return tpcm;
case 2:
tpcm.setMessage("vote_commit");
updateLogEntry(tpcm);
tpcm.setMessage("vote_commit_and_crash");
Runnable crash =
new Runnable() {
@Override
public void run() {
crash();
}
};
new Thread(crash).start();
return tpcm;
case 3:
tpcm.setMessage("vote_abort");
updateLogEntry(tpcm);
return tpcm;
default:
System.out.println("Wrong choice! Transaction being aborted!");
tpcm.setMessage("vote_abort");
break;
}
} else if (tpcm.getMessage().equals("global_commit")) {
File file = new File("FileStore/" + filename);
if (file.exists()) {
file.delete();
}
fileStoreMap.remove(filename);
updateLogEntry(tpcm);
} else if (tpcm.getMessage().equals("global_abort")) {
updateLogEntry(tpcm);
}
return tpcm;
}
