Examples of aleph.dir.DirectoryManager

aleph.dir.DirectoryManager
Abstract Class that manages cached copies of GlobalObjects. Any class extending this one must provide a no-arg constructor. @see aleph.GlobalObject @author Maurice Herlihy @date August 1998

  }  
  
  public static long totalBalance(String accountNum1, String accountNum2, Context context, Timespec deadline, Timespec period_ts, int tid) throws InterruptedException{
    try{
      
      DirectoryManager locator = HyFlow.getLocator();
      BankAccount account1 = (BankAccount) locator.open(accountNum1, "r", deadline, period_ts, tid);
      ContextDelegator.beforeReadAccess(account1, 0, context);
      BankAccount account2 = (BankAccount) locator.open(accountNum2, "r", deadline, period_ts, tid);
      
      long balance = 0;
      for(int i=0; i<Benchmark.calls; i++)
        balance += account1.checkBalance(context);

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  }
  
  public void borrow(List<String> accountNums, int branching, boolean initiator, int amount) {
    if(!initiator)
      withdraw(amount);  // provide the loan request
    DirectoryManager locator = HyFlow.getLocator();
    accountNums = (List<String>)((LinkedList<String>)accountNums).clone();
    for(int i=0; i<branching && !accountNums.isEmpty(); i++){
      LoanAccount account = (LoanAccount) locator.open(accountNums.remove(0), "w");
      boolean last = (i==branching-1 || accountNums.isEmpty());  // is the last one?
      int loan = last ? amount : (int)(Math.random()*amount);    // randomly have a loan amount from neighbor  
      account.borrow(accountNums, branching, false, loan);    // borrow from others
      deposit(loan);  // add the loaned amount to my money
      amount -= loan;

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    DirectoryManager locator = HyFlow.getLocator();
    return sum((_Node)locator.open(HEAD)) + 1;
  }
  private int sum(_Node node){
    int sum = node.getValue();
    DirectoryManager locator = HyFlow.getLocator();
    if(node.getLeftChild()!=null)
      sum += sum((_Node)locator.open(node.getLeftChild()));
    if(node.getRightChild()!=null)
      sum += sum((_Node)locator.open(node.getRightChild()));
    return sum;
  }

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      }
    }


    if(!initiator)
      withdraw(amount, __transactionContext__);  // provide the loan request
    DirectoryManager locator = HyFlow.getLocator();
    accountNums = (List<String>)((LinkedList<String>)accountNums).clone();
    for(int i=0; i<branching && !accountNums.isEmpty(); i++){
      LoanAccount account = (LoanAccount) locator.open((AbstractContext)__transactionContext__, accountNums.remove(0), "w");
      boolean last = (i==branching-1 || accountNums.isEmpty());  // is the last one?
      int loan = last ? amount : (int)(Math.random()*amount);    // randomly have a loan amount from neighbor  
      account.borrow(accountNums, branching, false, loan, __transactionContext__);    // borrow from others
      deposit(loan, __transactionContext__);  // add the loaned amount to my money
      amount -= loan;

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    throw new TransactionException("Failed to commit the transaction in the defined retries.");
  }
    
  public static void transfer(String accountNum1, String accountNum2, int amount, Context context){
    try{
      DirectoryManager locator = HyFlow.getLocator();
      BankAccount account1 = (BankAccount) locator.open(accountNum1);
      ContextDelegator.beforeReadAccess(account1, 0, context);
      BankAccount account2 = (BankAccount) locator.open(accountNum2);
      
      for(int i=0; i<Benchmark.calls; i++)
        account1.withdraw(amount, context);
      
      try {

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    }
    throw new TransactionException("Failed to commit the transaction in the defined retries.");
  }


  public int sum(List<String> accountNums, int branching) throws Throwable {
    DirectoryManager locator = HyFlow.getLocator();
    int sum = checkBalance();
    accountNums = (List<String>)((LinkedList<String>)accountNums).clone();
    for(int i=0; i<branching && !accountNums.isEmpty(); i++){
      LoanAccount account = (LoanAccount) locator.open(accountNums.remove(0), "r");
      sum += account.sum(accountNums, branching);
    }
    return sum;
  }

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      } catch (RemoteException e) {
        e.printStackTrace();
      }
    }
    
    DirectoryManager locator = HyFlow.getLocator();
    int sum = checkBalance(__transactionContext__);
    accountNums = (List<String>)((LinkedList<String>)accountNums).clone();
    for(int i=0; i<branching && !accountNums.isEmpty(); i++){
      LoanAccount account = (LoanAccount) locator.open((AbstractContext)__transactionContext__, accountNums.remove(0), "r");
      sum += account.sum(accountNums, branching, __transactionContext__);
    }
    return sum;
  }

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  public static boolean wakeupWaitingTaskonAbort(String accountNum1, String accountNum2, Context context, Timespec deadline, Timespec period_ts, int tid) {
    boolean result = false;


    try {
      Logger.fetal("Freeing resources " + accountNum1 + " " + accountNum2);
      DirectoryManager locator = HyFlow.getLocator();
      locator.wakeupWaitingTask(accountNum1, deadline, period_ts, tid);
      locator.wakeupWaitingTask(accountNum2, deadline, period_ts, tid);
    } catch(TransactionException e){
      System.out.println("Transaction Exception in Bank.wakeupWaitingTasksonAbort " + tid);
      //e.printStackTrace();
      throw e;
    } catch (Throwable e) {

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  public static boolean transfer(String accountNum1, String accountNum2, int amount, Context context, Timespec deadline, Timespec period_ts, int tid) throws InterruptedException{
    boolean result = false;
    try{
      
      DirectoryManager locator = HyFlow.getLocator();
      BankAccount account1 = (BankAccount) locator.open(accountNum1, "w", deadline, period_ts, tid);
      ContextDelegator.beforeReadAccess(account1, 0, context);
      BankAccount account2 = (BankAccount) locator.open(accountNum2, "w", deadline, period_ts, tid);


      for(int i=0; i<Benchmark.calls; i++)
        account1.withdraw(amount, context);
      
      try {

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  @Remote
  public void borrow(List<String> accountNums, int branching, boolean initiator, int amount) {
    if(!initiator)
      withdraw(amount);  // provide the loan request
    DirectoryManager locator = HyFlow.getLocator();
    accountNums = (List<String>)((LinkedList<String>)accountNums).clone();
    for(int i=0; i<branching && !accountNums.isEmpty(); i++){
      LoanAccount account = (LoanAccount) locator.open(accountNums.remove(0), "w");
      boolean last = (i==branching-1 || accountNums.isEmpty());  // is the last one?
      int loan = last ? amount : (int)(Math.random()*amount);    // randomly have a loan amount from neighbor  
      account.borrow(accountNums, branching, false, loan);    // borrow from others
      deposit(loan);  // add the loaned amount to my money
      amount -= loan;

View Full Code Here

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