def main():
"""Client makes a request to the MasterNode to either store or read
file.
"""
if sys.argv[1] == '-h' or len(sys.argv)<3:
print("Incorrect paramater usage. Please use the following:")
print("1.) ./client -s file_name")
print("2.) ./client -r file_name timestamp\n")
print("\t\tOperations\n")
print("-s\t\tStore operation")
print("-r\t\tRead Operation")
print("\t\tParameters\n")
print("file_name\t name of desired file")
print("timestamp\t set 0 if lastest file, otherwise specify previous file version")
exit()
#connection to masternode
channel = implementations.insecure_channel('localhost',50051)
stub = master_pb2.beta_create_MasterNode_stub(channel)
#file descriptor name passed as paramater
fd = sys.argv[2]
blocks = commonlib.splitFile(fd,commonlib.MB)
try:
if(sys.argv[1] == "-s"):
response = stub.Store(master_pb2.StoreRequest(file_name=fd,file_content=blocks),commonlib.TIMEOUT)
print(response.reply_msg)
else:
response=stub.Read(master_pb2.ReadRequest(file_name=sys.argv[2],timestamp=sys.argv[3],block_size=0),commonlib.TIMEOUT)
print(response.reply_file)
except:
print("error occured")
def Read(self, request, context):
"""Reads a file from data node
"""
filename = request.file_name
block_size = request.block_size
#if the block_size flag has not been set, set it to the default
#1mb
if block_size == 0:
block_size = commonlib.MB
fd = commonlib.splitFile(filename, block_size)
print("reading file ")
return master_pb2.ReadReply(reply_file=fd[0])
def Read(self,request,context):
"""Reads a file from data node
"""
filename = request.file_name
block_size = request.block_size
#if the block_size flag has not been set, set it to the default
#1mb
if block_size == 0:
block_size = commonlib.MB
fd = commonlib.splitFile(filename,block_size)
print("reading file ")
return master_pb2.ReadReply(reply_file=fd[0])
def main():
"""Client makes a request to the MasterNode to either store or read
file.
"""
if sys.argv[1] == '-h' or len(sys.argv) < 3:
print("Incorrect paramater usage. Please use the following:")
print("1.) ./client -s file_name")
print("2.) ./client -r file_name timestamp\n")
print("\t\tOperations\n")
print("-s\t\tStore operation")
print("-r\t\tRead Operation")
print("\t\tParameters\n")
print("file_name\t name of desired file")
print(
"timestamp\t set 0 if lastest file, otherwise specify previous file version"
)
exit()
#connection to masternode
channel = implementations.insecure_channel('localhost', 50051)
stub = master_pb2.beta_create_MasterNode_stub(channel)
#file descriptor name passed as paramater
fd = sys.argv[2]
blocks = commonlib.splitFile(fd, commonlib.MB)
try:
if (sys.argv[1] == "-s"):
response = stub.Store(
master_pb2.StoreRequest(file_name=fd, file_content=blocks),
commonlib.TIMEOUT)
print(response.reply_msg)
else:
response = stub.Read(
master_pb2.ReadRequest(file_name=sys.argv[2],
timestamp=sys.argv[3],
block_size=0), commonlib.TIMEOUT)
print(response.reply_file)
except:
print("error occured")
