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#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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from pkg_resources import resource_filename |
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from .processors import * |
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from .sentiment import SentimentAnalysisAPI |
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import os |
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import shlex |
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import os |
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import subprocess as sp |
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import requests |
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import time |
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import sys |
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import logging |
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class ProcessorsAPI(object): |
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PROC_VAR = 'PROCESSORS_SERVER' |
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def __init__(self, port, hostname="127.0.0.1", jar_path=None, log_file=None): |
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self.hostname = hostname |
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self.port = port |
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self.make_address(hostname, port) |
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self._start_command = "java -cp {} NLPServer {}" |
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self.timeout = 120 |
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# how long to wait between requests |
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self.wait_time = 2 |
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# processors |
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self.default = Processor(self.address) |
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self.fastnlp = FastNLPProcessor(self.address) |
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self.bionlp = BioNLPProcessor(self.address) |
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# sentiment |
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self.sentiment = SentimentAnalysisAPI(self.address) |
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# use the os module's devnull for compatibility with python 2.7 |
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#self.DEVNULL = open(os.devnull, 'wb') |
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self.logger = logging.getLogger(__name__) |
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self.log_file = self.prepare_log_file(log_file) |
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# resolve jar path |
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self.resolve_jar_path(jar_path) |
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# attempt to establish connection with server |
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self.establish_connection() |
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def prepare_log_file(self, lf): |
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""" |
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Configure logger and return file path for logging |
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""" |
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# log_file |
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log_file = os.path.expanduser(os.path.join("~", ".py-processors.log")) if not lf else os.path.expanduser(lf) |
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# attach handler |
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handler = logging.FileHandler(log_file) |
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self.logger.addHandler(handler) |
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self.logger.setLevel(logging.INFO) |
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return log_file |
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def annotate(self, text): |
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""" |
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Uses default processor (CoreNLP) to annotate text. Included for backwards compatibility. |
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""" |
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return self.default.annotate(text) |
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def establish_connection(self): |
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""" |
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Attempt to connect to a server (assumes server is running) |
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""" |
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if self.annotate("Blah"): |
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print("Connection with server established!") |
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else: |
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try: |
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# Attempt to start the server |
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self._start_server() |
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except Exception as e: |
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if not os.path.exists(self.jar_path): |
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print("processors-server.jar not found.") |
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print("Unable to start server. Please start the server manually with .start_server(\"path/to/processors-server.jar\")") |
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print("\n{}".format(e)) |
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def resolve_jar_path(self, jar_path): |
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""" |
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Attempts to preferentially set value of self.jar_path |
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""" |
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# Preference 1: if a .jar is given, check to see if the path is valid |
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if jar_path: |
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print("Using provided path") |
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jp = os.path.expanduser(jar_path) |
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# check if path is valid |
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if os.path.exists(jp): |
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self.jar_path = jp |
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else: |
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# Preference 2: if a PROCESSORS_SERVER environment variable is defined, check its validity |
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if ProcessorsAPI.PROC_VAR in os.environ: |
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print("Using path given via $PROCESSORS_SERVER") |
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jp = os.path.expanduser(os.environ[ProcessorsAPI.PROC_VAR]) |
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# check if path is valid |
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if os.path.exists(jp): |
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self.jar_path = jp |
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else: |
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print("WARNING: {0} path is invalid. \nPlease verify this entry in your environment:\n\texport {0}=/path/to/processors-server.jar".format(ProcessorsAPI.PROC_VAR)) |
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# Preference 3: attempt to use the processors-sever.jar downloaded when this package was installed |
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else: |
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print("Using default") |
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self.jar_path = resource_filename(__name__, "processors-server.jar") |
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def start_server(self, jar_path=None, timeout=120): |
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""" |
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Starts processors-sever.jar |
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""" |
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self.timeout = int(float(timeout)/2) |
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if jar_path: |
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self.jar_path = jar_path |
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self._start_server() |
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def stop_server(self, port=None): |
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""" |
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Sends a poison pill to the server and waits for shutdown response |
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""" |
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port = port or self.port |
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address = "http://{}:{}".format(self.hostname, port) |
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shutdown_address = "{}/shutdown".format(address) |
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# attempt shutdown |
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try: |
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response = requests.post(shutdown_address) |
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if response: |
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print(response.content.decode("utf-8")) |
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return True |
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# will fail if the server is already down |
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except Exception as e: |
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pass |
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return False |
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def _start_server(self, port=None): |
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""" |
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"Private" method called by start_server() |
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""" |
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if port: |
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self.port = port |
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# build the command |
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cmd = self._start_command.format(self.jar_path, self.port) |
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#print(cmd) |
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self._process = sp.Popen(shlex.split(cmd), |
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shell=False, |
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stderr=open(self.log_file, 'wb'), |
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stdout=open(self.log_file, 'wb'), |
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universal_newlines=True) |
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print("Starting processors-server ({}) on port {} ...".format(self.jar_path, self.port)) |
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print("\nWaiting for server...") |
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progressbar_length = int(self.timeout/self.wait_time) |
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for i in range(progressbar_length): |
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try: |
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success = self.annotate("blah") |
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if success: |
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print("\n\nConnection with processors-server established ({})".format(self.address)) |
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return True |
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sys.stdout.write("\r[{:{}}]".format('='*i, progressbar_length)) |
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time.sleep(self.wait_time) |
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except Exception as e: |
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raise(e) |
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#print(e) |
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# if the server still hasn't started, raise an Exception |
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raise Exception("Couldn't connect to processors-server. Is the port in use?") |
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def make_address(self, hostname, port): |
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# update hostname |
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self.hostname = hostname |
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# update port |
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self.port = port |
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# update address |
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self.address = "http://{}:{}".format(self.hostname, self.port) |
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def _get_path(self, p): |
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""" |
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Expand a user-specified path. Supports "~" shortcut. |
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""" |
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return os.path.abspath(os.path.normpath(os.path.expanduser(p))) |
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def __del__(self): |
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""" |
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Stop server |
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""" |
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try: |
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self.stop_server() |
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# close our file object |
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#self.DEVNULL.close() |
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print("Successfully shut down processors-server!") |
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except Exception as e: |
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#print(e) |
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print("Couldn't kill processors-server. Was server started externally?") |
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myedibleenso /
py-processors
