/**
* @param xcomputer
* @return
* @author Julius Huelsmann
* @version %I%, %U%
* @since 1.0
*/
private boolean addComputer(final ComputerRemote xcomputer) {
if (xcomputer == null || computer == null) {
View.print(getClass() + "Fehler.");
return false;
}
for (int i = 0; i < computer.size(); i++) {
//
// In case the computer has already been added or the computer to add
// is the local computer, return false.
if (xcomputer.matches(computer.get(i))) {
return false;
} else if (xcomputer.getUid().equals(getUid())) {
return false;
}
}
Staticio.skipPort(xcomputer.getPort());
computer.add(xcomputer);
setChanged();
notifyObservers(new Object[] {View.ID_UPDATE_COMPUTER, computer});
save(Constants.getConfigLocal());
return true;
}
private void removeTasklock(final String xoldid) {
final String newId = taskLock.remove(0);
if (!newId.equals(xoldid)) {
View.print("Fatal error in removing task lock" + xoldid + ". removed " + newId);
}
}
/**
* Initialize a new (local) repository which will be provided to remote computers afterwards.
*
* @param xpath the path to the repository at local computer
* @param xdescription Description of the repository (is stored inside the repository's
* configuration file)
* @param xname the repository's name.
* @author Julius Huelsmann
* @version %I%, %U%
* @since 1.0
*/
public boolean initializeRepository(
final String xpath, final String xdescription, final String xname) {
//
// Create folder and call the initialize - script.
final boolean success = new File(xpath).mkdirs();
final boolean success3 =
Utils.callScript(
Constants.UNIX_SRC_GIT_INIT,
Constants.UNIX_DEST_GIT_INIT.getAbsolutePath(),
xpath + " " + xname,
true);
if (!success3) {
// Inform the user on the failure
View.print(
"Failed to create repository "
+ xname
+ " at "
+ xpath
+ ":\n"
+ "\tSuccess creating folder: "
+ success
+ "\tSuccess executing script: "
+ success3);
} else {
//
// Inform the user on the success, add new repository and link to the
// suitable vectors
View.print("Successfully created repository " + xname + " at " + xpath + ".");
final Repository rep = new Repository(xname, new Random().nextDouble(), xdescription);
addRepository(rep);
addLink(new Link(xpath, this, rep));
//
// inform the remote computers on the new computer
broadcastInformation();
}
return success3;
}
/**
* Handle HI message.
*
* @param xaddr
*/
public final void handleHi(final String xaddr, final String xuid) {
for (int i = 0; i < computer.size(); i++) {
if (computer.get(i).getAddress().equals(xaddr) && computer.get(i).getUid().equals(xuid)) {
computer.get(i).setContacted();
} else if (computer.get(i).getAddress().equals(xaddr)
|| computer.get(i).getUid().equals(xuid)) {
View.print("Wrong computer UID or address.");
computer.get(i).setConnected(false);
}
}
}
/**
* Save the instance of {@link #ComputerLocal(String)} to the specified location.
*
* @param xconfigLocal the specified location
* @author Julius Huelsmann
* @version %I%, %U%
* @since 1.0
*/
public void save(final File xconfigLocal) {
final GitThread t = gitThread;
gitThread = null;
ObjectOutputStream oos;
try {
FileOutputStream fos = new FileOutputStream(xconfigLocal);
oos = new ObjectOutputStream(fos);
oos.writeObject(this);
oos.flush();
oos.close();
} catch (IOException e) {
View.print(
"The configuration could not be saved because the " + "folder does not exist: " + e);
}
gitThread = t;
}
/**
* @param xrepository
* @return
* @author Julius Huelsmann
* @version %I%, %U%
* @since 1.0
*/
private boolean addRepository(final Repository xrepository) {
if (xrepository == null || repositories == null) {
View.print(getClass() + "Fehler.");
return false;
}
for (int i = 0; i < repositories.size(); i++) {
if (xrepository.matches(repositories.get(i))) {
return false;
}
}
repositories.add(xrepository);
setChanged();
notifyObservers(new Object[] {View.ID_UPDATE_REPO, repositories});
save(Constants.getConfigLocal());
return true;
}
/**
* @param xlink
* @return
* @author Julius Huelsmann
* @version %I%, %U%
* @since 1.0
*/
private boolean addLink(final Link xlink) {
if (xlink == null || combination == null) {
View.print(getClass() + "Fehler.");
return false;
}
for (int i = 0; i < combination.size(); i++) {
if (xlink.matches(combination.get(i))) {
return false;
}
}
combination.add(xlink);
setChanged();
notifyObservers(new Object[] {View.ID_UPDATE_LINK, combination});
save(Constants.getConfigLocal());
return true;
}
/**
* This function is called once for starting to scan for other copies of the program inside the
* local network. It generates {@value #amountOfThreads} threads by calling the private method
* {@link #getNewClient(int, int, int, ComputerLocal)}.
*
* @param xcl instance of the Local Computer class that handles the received information -
* strings.
* @author Julius Huelsmann
* @version %I%, %U%
* @since 1.0
*/
public static void startScanning(final ComputerLocal xcl) {
//
// In case local testing is enabled, do not scan for remote computers
// but use the local IP and given port.
if (Constants.isLocalTesting()) {
requestLocalServerInformation(xcl);
} else {
//
// Initialize the Vector which contains information on the current
// process of each XTreaead that is created in the following.
currentProgress = new Vector<Integer>();
//
// Print information message and compute the range of one thread.
// Afterwards initialize #amountOfThreads threads by calling the method
// #getNewClient.
View.print("Start scanning for clients in " + amountOfThreads + " Threads.");
final int threadRange =
(Constants.globalPortEnd - Constants.globalPortStart) / amountOfThreads;
int sum = Constants.globalPortStart;
for (int i = 0; i < amountOfThreads; i++) {
// Add the lower range of scanning of the client to the progress vector
// and generate upper range by adding the threadRange.
currentProgress.add(sum);
int sump = sum + threadRange;
// Create new client and set the sum - integer to the upper range of
// the current process.
getNewClient(i, sum, sump, xcl);
sum = sump;
}
}
}
/**
* @param xia
* @param xport
* @author Julius Huelsmann
* @version %I%, %U%
* @since 1.0
*/
public final void generateAddclientTask(final InetAddress xia, final int xport) {
// If the address - port combination is unknown, generate new task to add
// the client
boolean found = false;
for (int i = 0; i < computer.size(); i++) {
if (computer.get(i).getAddress().equals(xia.getHostAddress())) {
found = true;
if (xport != computer.get(i).getPort()) {
computer.get(i).setPort(xport);
View.print(
"Stored wrong port identifier for client with ip " + computer.get(i).getAddress());
}
}
}
//
// In case the remote computer has not already been added, create new
// instance of TaskAddclient.
if (!found) {
taskList.add(new TaskAddclient(this, xia, xport));
}
}
/**
* @author Julius Huelsmann
* @version %I%, %U%
* @since 1.0
*/
public void run() {
while (!isInterrupted()) {
if (taskList.isEmpty() && getCombination().isEmpty()) {
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
interrupt();
}
}
//
//
// Check if the connection is established to all the RemoteComputers
// that are listed as online
final double currentTime = System.currentTimeMillis();
for (int i = 0; i < computer.size(); i++) {
final double dueTime = computer.get(i).getDueContact();
final double connectionTime = computer.get(i).getContactionThreshold();
if (computer.get(i).isConnected()) {
if (currentTime > connectionTime) {
computer.get(i).setConnected(false);
Staticio.unskipPort(computer.get(i).getPort());
setChanged();
notifyObservers(new Object[] {View.ID_UPDATE_COMPUTER, computer});
} else if (currentTime > dueTime) {
computer.get(i).sayHi(ComputerLocal.this);
System.out.println("sayin hi");
} else {
System.out.println("hier" + (currentTime - computer.get(i).getLastContact()));
}
}
}
final int taskListSize = taskList.size();
final int totalNumber = taskList.size() + getCombination().size();
final String identifier =
"GitThreadRun" + new Random().nextDouble() + " " + System.currentTimeMillis();
taskLock.add(identifier);
if (!taskLock.get(0).equals(identifier)) {
View.print(
"DEBUG: taskLock.get(0) equalt nicht identifier!"
+ taskLock.get(0)
+ ".."
+ identifier);
try {
Thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
continue;
}
for (int i = 0; i < taskList.size(); i++) {
setPercentage(1.0 * i / totalNumber);
if (taskList.get(i).isReadyPerformOperation()) {
removeTask(i);
i--;
}
}
setChanged();
notifyObservers(new Object[] {View.ID_UPDATE_TASKS, taskList, taskListfinished});
for (int i = 0; i < getCombination().size(); i++) {
setPercentage(1.0 * (taskListSize + i) / totalNumber);
//
// if the current combination contains a repository which
// is contained by the local Computer check whether changes
// occurred. If that is the case, send information message
// to all participants of the repository.
final Link currentLink = getCombination().get(i);
final Repository repo = currentLink.getRepository();
final double timestamp = System.currentTimeMillis();
if (currentLink.getComputer().getUid().equals(getUid())) {
final String repoPath = currentLink.getPath();
final String commitMsg = "auto" + timestamp;
if (Utils.callScript(
Constants.UNIX_SRC_GIT_COMMIT,
Constants.UNIX_DEST_GIT_COMMIT.getAbsolutePath(),
repoPath + " " + commitMsg,
true)) {
//
// Inform the user about the changes
View.print("git changes occurred at " + repoPath);
} else {
continue;
}
// Find all the computers connected ot the
final Vector<Link> vec_parti =
(Vector<Link>) fetchTaskupdateParticipants(repo.getUid())[0];
// important: initialize TaskUpdate before sending
// signal.
TaskUpdate tu = new TaskUpdate(vec_parti, currentLink, ComputerLocal.this);
if (!tu.add(
TaskUpdate.generateInformationString(
repo.getUid(), ComputerLocal.this.getUid(), "" + timestamp))) {
View.print(
"Error: new created task does not accept "
+ "information on the local computer.");
}
taskList.add(tu);
//
// Inform every client that is online to update the repository.
for (int j = 0; j < vec_parti.size(); j++) {
((ComputerRemote) vec_parti.get(j).getComputer())
.repositoryUpdated(getUid(), repo.getUid(), timestamp);
}
}
}
removeTasklock(identifier);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
View.print("interrupted");
interrupt();
}
}
}
/**
* Generate information string on the local computer configuration (includes {@link #computer},
* {@link #repositories}, {@link #combination}).
*
* @return whether new changes have occurred due to the update.
* @author Julius Huelsmann
* @version %I%, %U%
* @since 1.0
*/
public boolean convertInformationString(final String xstring, final String xadr) {
// go through all the identifiers and generate Vector of Computers,
// Repositories and Link-Combinations
boolean changesOccurred = false;
//
// Fetch information from string
final int occurr1 = xstring.indexOf(Utils.invalidCharLevel1);
final String remoteUid = xstring.substring(0, occurr1);
final String rest00 = xstring.substring(occurr1 + 1, xstring.length());
final String port = rest00.substring(0, rest00.indexOf(Utils.invalidCharLevel1));
final int iport = Integer.parseInt(port);
boolean found = false;
for (int i = 0; i < computer.size(); i++) {
if (computer.get(i).getUid().equals(remoteUid)) {
found = true;
if (computer.get(i).getPort() != iport
|| computer.get(i).getAddress().equals(xadr)
|| computer.get(i).isConnected() == false) {
changesOccurred = true;
}
computer.get(i).setPort(iport);
computer.get(i).setAddress(xadr);
computer.get(i).setConnected(true);
computer.get(i).setContacted();
}
}
// if the computer has not been found inside the list of computers, add
// it.
if (!found) {
ComputerRemote cr = new ComputerRemote(remoteUid, xadr, iport);
cr.setConnected(true);
addComputer(cr);
changesOccurred = true;
cr.setContacted();
}
// TODO: Check whether the computer with the UID has already been added
// to the list of computers.
String remainingString =
xstring.substring(remoteUid.length() + port.length() + 2, xstring.length());
String strgComputer =
remainingString.substring(0, remainingString.indexOf(Utils.invalidCharLevel1));
remainingString =
remainingString.substring(strgComputer.length() + 1, remainingString.length());
String strgRepositories =
remainingString.substring(0, remainingString.indexOf(Utils.invalidCharLevel1));
remainingString =
remainingString.substring(strgRepositories.length() + 1, remainingString.length());
String strgCombination = remainingString;
//
// ComputerRemote
for (int i = strgComputer.indexOf(Utils.invalidCharLevel2);
i != -1;
i = strgComputer.indexOf(Utils.invalidCharLevel2)) {
final String strgComputerSingle = strgComputer.substring(0, i);
strgComputer = strgComputer.substring(i + 1, strgComputer.length());
ComputerRemote comp = ComputerRemote.convertInformationString(strgComputerSingle);
changesOccurred = addComputer(comp) || changesOccurred;
}
//
// Repository
for (int i = strgRepositories.indexOf(Utils.invalidCharLevel2);
i != -1;
i = strgRepositories.indexOf(Utils.invalidCharLevel2)) {
final String strgSingle = strgRepositories.substring(0, i);
strgRepositories = strgRepositories.substring(i + 1, strgRepositories.length());
Repository repo = Repository.convertInformationString(strgSingle);
changesOccurred = addRepository(repo) || changesOccurred;
}
//
// Links
// Important: the Links can ony be added to the vector of
for (int i = strgCombination.indexOf(Utils.invalidCharLevel2);
i != -1;
i = strgCombination.indexOf(Utils.invalidCharLevel2)) {
final String strgSingle = strgCombination.substring(0, i);
strgCombination = strgCombination.substring(i + 1, strgCombination.length());
Link clink = Link.convertInformationString(strgSingle, repositories, computer);
changesOccurred = addLink(clink) || changesOccurred;
}
View.print("Something changed: " + changesOccurred);
if (changesOccurred) {
changed();
}
// Return whether the above-created computers, combinations and
// repositories have been already added to list.
return changesOccurred;
}
/**
* Create new instance of TaskUpdate from received message
*
* @param xmessageRest
* @return
* @author Julius Huelsmann
* @version %I%, %U%
* @since 1.0
*/
public final synchronized boolean newTaskUpdate(final String xmessageRest) {
//
// Enable task-lock.
final String identifier =
"newTaskUpdate" + new Random().nextDouble() + " " + System.currentTimeMillis();
taskLock.add(identifier);
//
// In case the task is not locked, continue. Otherwise go to else clause
// that waits for a few milliseconds and recalls the function afterwards.
if (taskLock.get(0).equals(identifier)) {
//
// Check if task already exists that is working with the same repository
// and add string to the task. May occur here due to task-lock-delay.
if (forewardTaskMessage(xmessageRest)) {
return true;
}
//
// Here it is clear that the task does not exist and that a new task has
// to be created. Thus save the current time as an identifier of the
// update time.
double timestamp = System.currentTimeMillis();
final String[] extractedInfo = TaskUpdate.fetchInformation(xmessageRest);
final String repoUid = extractedInfo[0];
//
// Fetch participants of the new task for creating the task.
Object[] o = fetchTaskupdateParticipants(repoUid);
final Vector<Link> vec_parti = (Vector<Link>) o[0];
final Link ownRepoLink = (Link) o[1];
if (ownRepoLink != null && !vec_parti.isEmpty()) {
final String repoPath = ownRepoLink.getPath();
final String commitMsg = "auto" + timestamp;
if (!Utils.callScript(
Constants.UNIX_SRC_GIT_COMMIT,
Constants.UNIX_DEST_GIT_COMMIT.getAbsolutePath(),
repoPath + " " + commitMsg,
true)) {
timestamp = TaskUpdate.VALUE_NO_UPDATE;
} else {
View.print(
getClass().getSimpleName()
+ " Error. local computer "
+ "out of sync?"
+ ownRepoLink
+ vec_parti.isEmpty());
}
final TaskUpdate tu = new TaskUpdate(vec_parti, ownRepoLink, this);
taskList.add(tu);
if (!tu.add(xmessageRest)) {
View.print("ERROR in COMPUTERLOCAL COULD NOT ADD " + xmessageRest);
final String newId = taskLock.remove(0);
if (!newId.equals(identifier)) {
View.print("Fatal error in newTaksupdate 1");
}
return false;
}
final String myself =
Task.COMMUNIICATION_CHANGES
+ ownRepoLink.getRepository().getUid()
+ Utils.invalidCharLevel1
+ getUid()
+ Utils.invalidCharLevel1
+ timestamp;
if (!tu.add(myself)) {
View.print("ERROR in COMPUTERLOCAL COULD NOT ADD " + xmessageRest);
final String newId = taskLock.remove(0);
if (!newId.equals(identifier)) {
View.print("Fatal error in newTaksupdate 2");
}
return false;
}
final String newId = taskLock.remove(0);
if (!newId.equals(identifier)) {
View.print("Fatal error in newTaksupdate 3");
}
return true;
}
// update participants
final String newId = taskLock.remove(0);
if (!newId.equals(identifier)) {
View.print("Fatal error in newTaksupdate 4");
}
return false;
} else {
try {
Thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
return newTaskUpdate(xmessageRest);
}
}
