class ThreadSafeSavingsAccount:
"""This class represents a thread-safe savings account
with the owner's name, PIN, and balance."""
def __init__(self, name, pin, balance=0.0):
"""Wrap a new account in a shared cell for thread-safety."""
account = SavingsAccount(name, pin, balance)
self.cell = SharedCell(account)
def __str__(self):
"""Returns the string rep of the account."""
return self.cell.read(lambda account: str(account))
def getBalance(self):
"""Returns the current balance."""
return self.cell.read(lambda account: account.getBalance())
def getName(self):
"""Returns the current name."""
return self.cell.read(lambda account: account.getName())
def getPin(self):
"""Returns the current pin."""
return self.cell.read(lambda account: account.getPin())
def deposit(self, amount):
"""If the amount is valid, adds it
to the balance and returns None;
otherwise, returns an error message."""
return self.cell.write(lambda account: account.deposit(amount))
class ThreadSafeTranscript(object):
"""This class represents a thread-safe transcript."""
def __init__(self):
"""Wrap a new transcript in a shared cell for
thread-safety."""
transcript = Transcript()
self.cell = SharedCell(transcript)
def __str__(self):
"""Returns the string rep of the transcript."""
return self.cell.read(lambda transcript: str(transcript))
def add(self, message):
"""Adds message to transcript."""
return self.cell.write(lambda transcript: transcript.add(message))
class ThreadTranscript:
def __init__(self, address, chats):
who = Transcript(address, chats)
self.cell = SharedCell(who)
def __str__(self):
return self.cell.read(lambda who: str(who))
def getChats(self):
return self.cell.read(lambda who: who.getChats())
def getAddress(self):
return self.cell.read(lambda who: who.getAddress())
def addChat(self, message):
return self.cell.write(lambda who: who.addChat(message))
class ThreadSafeSavingsAccount:
"""This class represents a thread-safe savings account
with the owner's name, PIN, and balance."""
def __init__(self, name, pin, balance = 0.0):
"""Wrap a new account in a shared cell for thread-safety."""
account = SavingsAccount(name, pin, balance)
self.cell = SharedCell(account)
def __str__(self):
"""Returns the string rep of the account."""
return self.cell.read(lambda account: str(account))
def getBalance(self):
"""Returns the current balance."""
return self.cell.read(lambda account: account.getBalance())
def getName(self):
"""Returns the current name."""
return self.cell.read(lambda account: account.getName())
def main():
"""Creates a shared cell on a Counter object, and reader and
writer threads to increment it and observe its value."""
counter = Counter()
cell = SharedCell(counter)
threads = []
print("Creating reader threads.")
for i in range(1, 5):
threads.append(Reader(cell, i))
print("Creating writer threads.")
for i in range(1, 3):
threads.append(Writer(cell, i))
print("Starting the threads.")
for thread in threads:
thread.start()
def __init__(self, name, pin, balance=0.0):
"""Wrap a new account in a shared cell for
thread-safety."""
account = SavingsAccount(name, pin, balance)
self.cell = SharedCell(account)
def __init__(self):
"""Wrap a new addressbook in a shared cell for
thread-safety."""
self.addressbook = Addressbook()
self.cell = SharedCell(self.addressbook)
self.iter_current = 0
class ThreadSafeAddressbook(object):
"""This class represents a thread-safe addressbook."""
def __init__(self):
"""Wrap a new addressbook in a shared cell for
thread-safety."""
self.addressbook = Addressbook()
self.cell = SharedCell(self.addressbook)
self.iter_current = 0
def __iter__(self):
"""Declares that this class is iterable."""
return self
def __next__(self):
"""Facilitates iteration through the addressbook."""
if self.iter_current >= len(
self.addressbook.entries): # Stop condition
raise StopIteration
else:
result = self.addressbook.entries[self.iter_current]
self.iter_current += 1
return result
def iter_reset(self):
"""Keeps track of the current index while iterating through the addressbook."""
self.iter_current = 0
def __str__(self):
"""Returns the string representation of the addressbook."""
try:
return self.cell.read(lambda addressbook: str(self.addressbook))
except:
self.cell.endRead()
raise
def set_filename(self, filename):
"""Set the filename of the addressbook for later retrieval if necessary."""
try:
return self.cell.write(
lambda addressbook: self.addressbook.set_filename(filename))
except:
print("Error writing to addressbook. (set_filename function)")
self.cell.endRead()
raise
def get_filename(self):
"""Returns the filename of the addressbook .csv that is loaded."""
try:
return self.cell.read(
lambda addressbook: self.addressbook.get_filename())
except:
print("Error reading from addressbook. (get_filename function)")
self.cell.endRead()
raise
def add(self, message):
"""Adds entry to addressbook."""
try:
return self.cell.write(
lambda addressbook: self.addressbook.add(message))
except:
print("Error writing to addressbook. (add function)")
self.cell.endWrite()
raise
def get_by_index(self, index):
"""Returns the Person at the index specified from a parameter."""
try:
return self.cell.read(
lambda addressbook: self.addressbook.get_by_index(index))
except:
print("Error reading from addressbook. (get_by_index function)")
self.cell.endRead()
raise
def get_by_name(self, namere):
"""Searches the addressbook with regexp with a pattern from a parameter."""
try:
return self.cell.read(
lambda addressbook: self.addressbook.get_by_name(namere))
except:
print("Error reading from addressbook. (get_by_name function)")
self.cell.endRead()
raise
def update(self, payload):
"""Update an entry in the addressbook."""
try:
return self.cell.write(
lambda addressbook: self.addressbook.update(payload))
except:
print("Error writing to addressbook. (updte function)")
self.cell.endWrite()
raise
def delete(self, payload):
"""Delete an entry in the addressbook."""
try:
return self.cell.write(
lambda addressbook: self.addressbook.delete(payload))
except:
print("Error writing to addressbook. (delete function)")
self.cell.endWrite()
raise
def __init__(self, address, chats):
who = Transcript(address, chats)
self.cell = SharedCell(who)
def __init__(self):
"""Wrap a new transcript in a shared cell for
thread-safety."""
transcript = Transcript()
self.cell = SharedCell(transcript)