More refinement of frontier and worker for delicious multi-threading

spacetime-crawler4py-master/config.ini

@@ -1,6 +1,6 @@
 [IDENTIFICATION]
 # Set your user agent string here.
-USERAGENT = IR US22 19854690,44333574
+USERAGENT = IR US22 19854690,44333574,95241547
 
 [CONNECTION]
 HOST = styx.ics.uci.edu
@@ -9,12 +9,12 @@ PORT = 9000
 [CRAWLER]
 SEEDURL = https://www.ics.uci.edu,https://www.cs.uci.edu,https://www.informatics.uci.edu,https://www.stat.uci.edu
 # In seconds
-POLITENESS = 0.05
+POLITENESS = 0.5
 
 [LOCAL PROPERTIES]
 # Save file for progress
 SAVE = frontier.shelve
 
 # IMPORTANT: DO NOT CHANGE IT IF YOU HAVE NOT IMPLEMENTED MULTITHREADING.
-THREADCOUNT = 8
+THREADCOUNT = 1
 

spacetime-crawler4py-master/crawler/frontier.py

@@ -1,7 +1,7 @@
 import os
 import shelve
 
-from threading import Thread, RLock
+from threading import Thread, Lock,Semaphore
 from queue import Queue, Empty
 
 from utils import get_logger, get_urlhash, normalize
@@ -15,12 +15,14 @@ from datacollection import *
 #*.stat.uci.edu/*                                                       3
 #today.uci.edu/department/information_computer_sciences/*               4
 
+#Semaphore for each domain to keep each domain noice and tidy with politeness
 domain_semaphores = [Semaphore(3),Semaphore(3),Semaphore(3),Semaphore(3),Semaphore(3)]
 data_mutex = Lock()
+
 file_1_mutex = Lock()
 file_2_mutex = Lock()
 file_3_mutex = Lock()
-file_4_mutex = LocK()
+file_4_mutex = Lock()
 
 class Frontier(object):
     def __init__(self, config, restart):
@@ -112,73 +114,7 @@ class Frontier(object):
 
 
         
-        # Q1
+      
-        ###CRITICAL SECTION
-        file_1_mutex.acquire()
-        self.uniques.add(removeFragment(url)) 
-
-        #Writing to local file
-        f = open("q1.txt", "w")
-        f.write("Number of unique pages: {length}\n".format(length = len(self.uniques)))
-        f.close()
-
-        file_1_mutex.release()
-
-        # Q2
-        file_2_mutex.acquire()
-        tempTok = tokenize(url)
-        if len(tempTok) > self.max:
-                self.max = len(tempTok)
-                self.longest = url
-
-
-        # creating text file for question 2
-        f = open("q2.txt", "w")
-        f.write("Largest page url: {url} \nLength of page: {length}".format(url = self.longest, length = self.max))
-        f.close()
-
-        file_2_mutex.release()
-
-        # Q3
-        file_3_mutex.acquire()
-        tempTok = removeStopWords(tempTok)
-        computeFrequencies(tempTok, self.grand_dict)
-
-        # creating text file for question 3
-        f = open("q3.txt", "w")
-        sortedGrandDict = {k: v for k, v in sorted(self.grand_dict.items(), key=lambda item: item[1], reverse = True)}
-        i = 0
-        for k, v in sortedGrandDict.items():
-            if i == 50:
-                break
-            else:
-                f.write("{}: {}\n".format(k, v))
-                i += 1
-        f.close()
-
-        file_3_mutex.release()
-
-        # Q4
-        file_4_mutex.acquire()
-
-        fragless = removeFragment(url)
-        domain = findDomains(fragless.netloc)
-        if domain[1] == 'ics':
-            if domain[0] not in self.ics:
-                self.ics[domain[0]] = urlData(url, domain[0], domain[1])
-            else:
-                if fragless not in self.ics[domain[0]].getUniques():
-                    self.ics[domain[0]].appendUnique(fragless)
-
-        # creating text file for question 4
-        sortedDictKeys = sorted(self.ics.keys())
-        f = open("q4.txt", "w")
-        for i in sortedDictKeys:
-            f.write("{url}, {num}".format(url = self.ics[i].getNiceLink(), num = len(self.ics[i].getUniques())))
-        f.close()
-        
-        file_4_mutex.release()
-
     def acquire_polite(url):
         return domain_semaphores[get_semaphore_index(url)].acquire()
 
@@ -206,6 +142,8 @@ class Frontier(object):
         my_filename = os.path.join(path_to_script, "q1.txt")
         
         # Will create a file of all the unique links and you can read the file and do lines = f.readlines() then len(lines) to get the number of unique links
+        #Locking and releasing each file
+        file_1_mutex.acquire()
         if (os.path.exists(my_filename)):
             f = open(my_filename, 'a')
             f.write(removeFragment(url))
@@ -214,10 +152,12 @@ class Frontier(object):
             f = open(my_filename, 'w')
             f.write(removeFragment(url))
             f.close()
-        
+        file_1_mutex.release()
+
     def q234(self, url, resp):
         # rakslice (8 May 2013) Stackoverflow. https://stackoverflow.com/questions/16430258/creating-a-python-file-in-a-local-directory
         #       this saves to the local directory, so I can constantly access the right file and check if it exists or not
+        file_2_mutex.acquire()
         path_to_script = os.path.dirname(os.path.abspath(__file__))
         my_filename = os.path.join(path_to_script, "q2.txt")
 
@@ -228,7 +168,8 @@ class Frontier(object):
             f = open(my_filename, 'w')
             f.write("Longest Page: {url}, length: {length}".format(url = self.longest, length = self.max))
             f.close()
-
+        file_2_mutex.release()
+            
         tempTok = removeStopWords(tempTok)
         computeFrequencies(tempTok, self.grand_dict)
 
@@ -237,6 +178,8 @@ class Frontier(object):
         path_to_script = os.path.dirname(os.path.abspath(__file__))
         my_filename = os.path.join(path_to_script, "q3.txt")
 
+        file_3_mutex.acquire()
+
         f = open(my_filename, "w")
         sortedGrandDict = {k: v for k, v in sorted(self.grand_dict.items(), key=lambda item: item[1], reverse = True)}
         i = 0
@@ -248,6 +191,8 @@ class Frontier(object):
                 i += 1
         f.close()
 
+        file_3_mutex.release()
+
         fragless = removeFragment(url)
         domain = findDomains(fragless.netloc)
         if domain[1] == 'ics':
@@ -263,10 +208,11 @@ class Frontier(object):
         my_filename = os.path.join(path_to_script, "q4.txt")
 
         # creating text file for question 4
+        file_4_mutex.acquire()
         sortedDictKeys = sorted(self.ics.keys())
         f = open(my_filename, "w")
         for i in sortedDictKeys:
             f.write("{url}, {num}".format(url = self.ics[i].getNiceLink(), num = len(self.ics[i].getUniques())))
         f.close()
-
+        file_4_mutex.release()
         

spacetime-crawler4py-master/crawler/worker.py

@@ -35,16 +35,17 @@ class Worker(Thread):
             tic = time.perf_counter()
             self.frontier.q1(tbd_url)
             toc = time.perf_counter()
-            print(f"Took {toc - tic:0.4f} seconds to do download url")
+            print(f"Took {toc - tic:0.4f} seconds to do log q1 url")
             
             tic = time.perf_counter()
             self.frontier.q234(tbd_url, resp)
             toc = time.perf_counter()
-            print(f"Took {toc - tic:0.4f} seconds to do download url")
+            print(f"Took {toc - tic:0.4f} seconds to do log q234 url")
 
             self.logger.info(
                 f"Downloaded {tbd_url}, status <{resp.status}>, "
                 f"using cache {self.config.cache_server}.")
+            
             tic = time.perf_counter()
             scraped_urls = scraper.scraper(tbd_url, resp)
             toc = time.perf_counter()
@@ -57,7 +58,7 @@ class Worker(Thread):
             toc = time.perf_counter()
             print(f"Took {toc - tic:0.4f} seconds to do store stuffs")
             
-            while(start + self.config.time_delay > time.perf_counter()){
+            while start + self.config.time_delay > time.perf_counter():
                 time.sleep(self.config.time_delay/5)
                 self.frontier.release_polite(tbd_url)
-            }
+