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# Copyright 2022-2024 ETSI TeraFlowSDN - TFS OSG (https://tfs.etsi.org/)
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#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging,threading, time
import logging
from lxml import etree
import os
import subprocess
XML_CONFIG_FILE="/var/teraflow/pcep/service/resources/PCEServerConfiguration.xml"
LOGGER = logging.getLogger(__name__)
class JavaRunner:
def __init__(self,address):
self.__process=None
self.__lock = threading.Lock()
self.__address = address
def getCurrentLocalPort(self):
with self.__lock:
return self.__localPort
def getCurrentMngPort(self):
with self.__lock:
return self.__managementPort
def getPid(self):
return self.__process.pid
def execAndKill(self):
LOGGER.debug("Before exec and kill")
os.chdir("/var/teraflow/pcep/service/resources/")
cwd = os.getcwd()
LOGGER.info("Current working directory: %s", cwd)
# Security shell=False
self.__process=subprocess.Popen(['java -jar PCE-jar-with-dependencies.jar '],#+ XML_CONFIG_FILE
shell=False,start_new_session=True,stdout=subprocess.PIPE)
LOGGER.debug("Time to sleep")
java_pid = self.__process.pid
print("Java PID:", java_pid)
time.sleep(15)
self.__process.terminate()
def execPcep(self) -> bool:
"""
Executes java pcep in non-blocking process
"""
LOGGER.debug("Executing JavaRunner")
os.chdir("/var/teraflow/pcep/service/resources/")
try:
#self.__process = subprocess.Popen(['java', '-jar', 'Ejecutable_2.jar'],
# shell=False, start_new_session=True,
# stdout=subprocess.PIPE, stderr=subprocess.PIPE)
LOGGER.debug("Executing command: %s", ('java', '-Dlog4j.configurationFile=log4j2.xml', '-jar', 'PCE-jar-with-dependencies.jar', 'PCEServerConfiguration.xml'))
self.__process = subprocess.Popen(['java', '-Dlog4j.configurationFile=log4j2.xml', '-jar', 'PCE-jar-with-dependencies.jar', 'PCEServerConfiguration.xml'],
shell=False, start_new_session=True,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout_thread = threading.Thread(target=self.read_stdout)
stderr_thread = threading.Thread(target=self.read_stderr)
stdout_thread.start()
stderr_thread.start()
self.__process.wait()
stdout_thread.join()
stderr_thread.join()
except subprocess.CalledProcessError as err:
LOGGER.debug('ERROR: %s', err)
return self.__process
def read_stdout(self):
try:
for line in iter(self.__process.stdout.readline, b''):
print(f"STDOUT: {line.decode('utf-8')}", flush=True)
except Exception as e:
print(f"Error in read_stdout: {e}")
def read_stderr(self):
try:
for line in iter(self.__process.stderr.readline, b''):
print(f"STDERR: {line.decode('utf-8')}", flush=True)
except Exception as e:
print(f"Error in read_stderr: {e}")
def setPort(self,port):
self.__peerPort=port
return True
def setAsNumber(self,asNumber):
self.__asNumber=asNumber
return True
def setPeer(self, address) -> bool:
"""
Sets XML existing config file with peer address and port. TODO: as_number
"""
XMLParser = etree.XMLParser(remove_blank_text=False)
tree = etree.parse(XML_CONFIG_FILE, parser=XMLParser)
root = tree.getroot()
# Find the <LocalPCEAddress> element
pceAddress = root.find(".//LocalPCEAddress")
#Check if the element is found
if pceAddress is not None:
LOGGER.debug("Old LocalPCEAddress value: %s", pceAddress.text)
# Update the text content of the element with the new address
pceAddress.text = str(address)
LOGGER.debug("New LocalPCEAddress value: %s", pceAddress.text)
# Save the modified XML back to the file
tree.write(XML_CONFIG_FILE, pretty_print=True)
return True # Return True to indicate success
return False # Return False if the element is not found
#return True
def endBGPSpeaker(self) -> bool:
"""
Kills java program connected to BGPLS Speaker with SIGKILL signal
"""
LOGGER.debug("sending kill signal to process %s",self.__process.pid)
LOGGER.debug("PID: %d",self.__process.pid)
self.__process.kill()
return True
def getRunnerInfo(self):
return self.__address,self.__asNumber,self.__peerPort