def keepAliveMonitor(mid):
"""keepAliveMonitor(mid: str) -> void
Prolongs the life of a monitor 'data_life_time'.
"""
common.assertType(mid, str, "Expected monitor id to be a string value")
mdata = _getMonitor(mid)
mdata[K_RWLOCK].acquireWrite()
mdata[K_TIMESTAMP] = time.time()
mdata[K_RWLOCK].release()
def existsMonitorData(mid):
"""existsMonitorData(mid: str) -> bool
Returns true if the DB contains data of the specified monitor
"""
common.assertType(mid, str, "Expected monitor id to be a string value")
monitor_db_lock.acquireRead()
ret = mid in monitor_db
monitor_db_lock.release()
return ret
def existsMonitorData(mid):
"""existsMonitorData(mid: str) -> bool
Returns true if the DB contains data of the specified monitor
"""
common.assertType(mid, str, "Expected monitor id to be a string value")
monitor_db_lock.acquireRead()
ret = mid in monitor_db
monitor_db_lock.release()
return ret
def keepAliveMonitor(mid):
"""keepAliveMonitor(mid: str) -> void
Prolongs the life of a monitor 'data_life_time'.
"""
common.assertType(mid, str, "Expected monitor id to be a string value")
mdata = _getMonitor(mid)
mdata[K_RWLOCK].acquireWrite()
mdata[K_TIMESTAMP] = time.time()
mdata[K_RWLOCK].release()
def updateMonitorData(mid, sinfodao):
"""updateMonitorData(mid: str, sinfodao: SysInfoDAO) -> void
Updates the information of the specified client.
"""
common.assertType(mid, str, "Expeced monitor id to be a string value")
common.assertType(sinfodao, common.SysInfoDAO, "Expected SysInfoDAO")
mdata = _getMonitor(mid)
mdata[K_RWLOCK].acquireWrite()
mdata[K_SYSINFO] = sinfodao
mdata[K_TIMESTAMP] = time.time()
mdata[K_RWLOCK].release()
def updateMonitorData(mid, sinfodao):
"""updateMonitorData(mid: str, sinfodao: SysInfoDAO) -> void
Updates the information of the specified client.
"""
common.assertType(mid, str, "Expeced monitor id to be a string value")
common.assertType(sinfodao, common.SysInfoDAO, "Expected SysInfoDAO")
mdata = _getMonitor(mid)
mdata[K_RWLOCK].acquireWrite()
mdata[K_SYSINFO] = sinfodao
mdata[K_TIMESTAMP] = time.time()
mdata[K_RWLOCK].release()
def getMonitorData(mid):
"""getMonitorData(mid: str) -> SysInfoDAO, str, str
Returns the stored data of a monitor or raises a KeyError exception if the
monitor does not exist.
Returns the tuple (SysInfoDAO, ip, port)
"""
common.assertType(mid, str, "Expected monitor id to be a string value")
mdata = _getMonitor(mid)
mdata[K_RWLOCK].acquireRead()
sinfodao = mdata[K_SYSINFO]
port = mdata[K_PORT]
ip = mdata[K_IP]
mdata[K_RWLOCK].release()
return sinfodao, ip, port
def getMonitorData(mid):
"""getMonitorData(mid: str) -> SysInfoDAO, str, str
Returns the stored data of a monitor or raises a KeyError exception if the
monitor does not exist.
Returns the tuple (SysInfoDAO, ip, port)
"""
common.assertType(mid, str, "Expected monitor id to be a string value")
mdata = _getMonitor(mid)
mdata[K_RWLOCK].acquireRead()
sinfodao = mdata[K_SYSINFO]
port = mdata[K_PORT]
ip = mdata[K_IP]
mdata[K_RWLOCK].release()
return sinfodao, ip, port
def initializeNewMonitorData(ip, port):
"""initializeNewMonitorData(ip: str, port: str) -> str
Generates a monitor id with the given ip and port and initializes an
entry in the internal db for this new monitor id.
Returns the generated monitor id.
"""
common.assertType(ip, str, "Expected ip to be a string value")
common.assertType(port, str, "Expected port to be a string value")
sha256 = hashlib.sha256()
sha256.update(ip)
sha256.update(port)
mid = sha256.hexdigest()
monitor_db_lock.acquireWrite()
monitor_db[mid] = [ip, port, None, time.time(), common.ReadWriteLock()]
monitor_db_lock.release()
return mid
def initializeNewMonitorData(ip, port):
"""initializeNewMonitorData(ip: str, port: str) -> str
Generates a monitor id with the given ip and port and initializes an
entry in the internal db for this new monitor id.
Returns the generated monitor id.
"""
common.assertType(ip, str, "Expected ip to be a string value")
common.assertType(port, str, "Expected port to be a string value")
sha256 = hashlib.sha256()
sha256.update(ip)
sha256.update(port)
mid = sha256.hexdigest()
monitor_db_lock.acquireWrite()
monitor_db[mid] = [ip, port, None, time.time(), common.ReadWriteLock()]
monitor_db_lock.release()
return mid
