TechEmpower.FrameworkBenchmarks/toolset/benchmark/framework_test.py

from benchmark.fortune_html_parser import FortuneHTMLParser

import importlib
import os
import subprocess
import time
import re
import pprint
import sys
import traceback
import json
import textwrap

class FrameworkTest:
  ##########################################################################################
  # Class variables
  ##########################################################################################
  headers_template = "-H 'Host: localhost' -H '{accept}' -H 'Connection: keep-alive'"
  headers_full_template = "-H 'Host: localhost' -H '{accept}' -H 'Accept-Language: en-US,en;q=0.5' -H 'User-Agent: Mozilla/5.0 (X11; Linux x86_64) Gecko/20130501 Firefox/30.0 AppleWebKit/600.00 Chrome/30.0.0000.0 Trident/10.0 Safari/600.00' -H 'Cookie: uid=12345678901234567890; __utma=1.1234567890.1234567890.1234567890.1234567890.12; wd=2560x1600' -H 'Connection: keep-alive'"
 
  accept_json = "Accept: application/json,text/html;q=0.9,application/xhtml+xml;q=0.9,application/xml;q=0.8,*/*;q=0.7"
  accept_html = "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
  accept_plaintext = "Accept: text/plain,text/html;q=0.9,application/xhtml+xml;q=0.9,application/xml;q=0.8,*/*;q=0.7"

  concurrency_template = """
    
    echo ""
    echo "---------------------------------------------------------"
    echo " Running Primer {name}"
    echo " {wrk} {headers} -d 5 -c 8 -t 8 \"http://{server_host}:{port}{url}\""
    echo "---------------------------------------------------------"
    echo ""
    {wrk} {headers} -d 5 -c 8 -t 8 "http://{server_host}:{port}{url}"
    sleep 5
    
    echo ""
    echo "---------------------------------------------------------"
    echo " Running Warmup {name}"
    echo " {wrk} {headers} -d {duration} -c {max_concurrency} -t {max_threads} \"http://{server_host}:{port}{url}\""
    echo "---------------------------------------------------------"
    echo ""
    {wrk} {headers} -d {duration} -c {max_concurrency} -t {max_threads} "http://{server_host}:{port}{url}"
    sleep 5
    for c in {interval}
    do
      echo ""
      echo "---------------------------------------------------------"
      echo " Concurrency: $c for {name}"
      echo " {wrk} {headers} {pipeline} -d {duration} -c $c -t $(($c>{max_threads}?{max_threads}:$c)) \"http://{server_host}:{port}{url}\""
      echo "---------------------------------------------------------"
      echo ""
      {wrk} {headers} {pipeline} -d {duration} -c "$c" -t "$(($c>{max_threads}?{max_threads}:$c))" http://{server_host}:{port}{url}
      sleep 2
    done
  """

  query_template = """
    
    echo ""
    echo "---------------------------------------------------------"
    echo " Running Primer {name}"
    echo " wrk {headers} -d 5 -c 8 -t 8 \"http://{server_host}:{port}{url}2\""
    echo "---------------------------------------------------------"
    echo ""
    wrk {headers} -d 5 -c 8 -t 8 "http://{server_host}:{port}{url}2"
    sleep 5
    
    echo ""
    echo "---------------------------------------------------------"
    echo " Running Warmup {name}"
    echo " wrk {headers} -d {duration} -c {max_concurrency} -t {max_threads} \"http://{server_host}:{port}{url}2\""
    echo "---------------------------------------------------------"
    echo ""
    wrk {headers} -d {duration} -c {max_concurrency} -t {max_threads} "http://{server_host}:{port}{url}2"
    sleep 5
    for c in {interval}
    do
      echo ""
      echo "---------------------------------------------------------"
      echo " Queries: $c for {name}"
      echo " wrk {headers} -d {duration} -c {max_concurrency} -t {max_threads} \"http://{server_host}:{port}{url}$c\""
      echo "---------------------------------------------------------"
      echo ""
      wrk {headers} -d {duration} -c {max_concurrency} -t {max_threads} "http://{server_host}:{port}{url}$c"
      sleep 2
    done
  """

  language = None
  platform = None
  webserver = None
  classification = None
  database = None
  approach = None
  orm = None
  framework = None
  os = None
  database_os = None
  display_name = None
  notes = None
  versus = None

  ############################################################
  # Test Variables
  ############################################################
  JSON = "json"
  DB = "db"
  QUERY = "query"
  FORTUNE = "fortune"
  UPDATE = "update"
  PLAINTEXT = "plaintext"

  ##########################################################################################
  # Public Methods
  ##########################################################################################


  ############################################################
  # Validates the jsonString is a JSON object with a 'message'
  # key with the value "hello, world!" (case-insensitive).
  ############################################################
  def validateJson(self, jsonString, out, err):
    try:
      obj = json.loads(jsonString)

      if  obj["message"].lower() == "hello, world!":
        return True
    except:
      err.write(textwrap.dedent("""
          -----------------------------------------------------
            Error: validateJson raised exception
          -----------------------------------------------------
          {trace}
          """.format( trace=sys.exc_info()[:2])))
    return False

  ############################################################
  # Validates the jsonString is a JSON object that has an "id"
  # and a "randomNumber" key, and that both keys map to 
  # integers.
  ############################################################
  def validateDb(self, jsonString, out, err):
    try:
      obj = json.loads(jsonString)

      # This will error out of the value could not parsed to a
      # float (this will work with ints, but it will turn them
      # into their float equivalent; i.e. "123" => 123.0)
      if type(float(obj["id"])) == float and type(float(obj["randomNumber"])) == float:
        return True
    except:
      err.write(textwrap.dedent("""
          -----------------------------------------------------
            Error: validateDb raised exception
          -----------------------------------------------------
          {trace}
          """.format( trace=sys.exc_info()[:2])))
    return False

  ############################################################
  # Validates the jsonString is an array with a length of
  # 2, that each entry in the array is a JSON object, that
  # each object has an "id" and a "randomNumber" key, and that
  # both keys map to integers.
  ############################################################
  def validateQuery(self, jsonString, out, err):
    try:
      arr = json.loads(jsonString)

      if type(float(arr[0]["id"])) == float and type(float(arr[0]["randomNumber"])) == float and type(float(arr[1]["id"])) == float and type(float(arr[1]["randomNumber"])) == float:
        return True
    except:
      err.write(textwrap.dedent("""
          -----------------------------------------------------
            Error: validateQuery raised exception
          -----------------------------------------------------
          {trace}
          """.format( trace=sys.exc_info()[:2])))
    return False

  ############################################################
  # Parses the given HTML string and asks a FortuneHTMLParser
  # whether the parsed string is a valid fortune return.
  ############################################################
  def validateFortune(self, htmlString, out, err):
    try:
      parser = FortuneHTMLParser()
      parser.feed(htmlString)

      return parser.isValidFortune()
    except:
      err.write(textwrap.dedent("""
          -----------------------------------------------------
            Error: validateFortune raised exception
          -----------------------------------------------------
          {trace}
          """.format( trace=sys.exc_info()[:2])))
    return False

  ############################################################
  # Validates the jsonString is an array with a length of
  # 2, that each entry in the array is a JSON object, that
  # each object has an "id" and a "randomNumber" key, and that
  # both keys map to integers.
  ############################################################
  def validateUpdate(self, jsonString, out, err):
    try:
      arr = json.loads(jsonString)

      if type(float(arr[0]["id"])) == float and type(float(arr[0]["randomNumber"])) == float and type(float(arr[1]["id"])) == float and type(float(arr[1]["randomNumber"])) == float:
        return True
    except:
      err.write(textwrap.dedent("""
          -----------------------------------------------------
            Error: validateUpdate raised exception
          -----------------------------------------------------
          {trace}
          """.format( trace=sys.exc_info()[:2])))
    return False

  ############################################################
  #
  ############################################################
  def validatePlaintext(self, jsonString, out, err):
    try:
      return jsonString.lower().strip() == "hello, world!"
    except:
      err.write(textwrap.dedent("""
          -----------------------------------------------------
            Error: validatePlaintext raised exception
          -----------------------------------------------------
          {trace}
          """.format( trace=sys.exc_info()[:2])))
    return False

  ############################################################
  # start(benchmarker)
  # Start the test using it's setup file
  ############################################################
  def start(self, out, err):
    return self.setup_module.start(self.benchmarker, out, err)
  ############################################################
  # End start
  ############################################################

  ############################################################
  # stop(benchmarker)
  # Stops the test using it's setup file
  ############################################################
  def stop(self, out, err):
    return self.setup_module.stop(out, err)
  ############################################################
  # End stop
  ############################################################

  ############################################################
  # verify_urls
  # Verifys each of the URLs for this test. THis will sinply 
  # curl the URL and check for it's return status. 
  # For each url, a flag will be set on this object for whether
  # or not it passed
  ############################################################
  def verify_urls(self, out, err):
    # JSON
    if self.runTests[self.JSON]:
      out.write( "VERIFYING JSON (" + self.json_url + ") ...\n" )
      out.flush()
      try:
        url = self.benchmarker.generate_url(self.json_url, self.port)
        output = self.__curl_url(url, self.JSON, out, err)
        if self.validateJson(output, out, err):
          self.json_url_passed = True
        else:
          self.json_url_passed = False
      except (AttributeError, subprocess.CalledProcessError) as e:
        self.json_url_passed = False
      out.write("VALIDATING JSON ... ")
      if self.json_url_passed:
        out.write("PASS\n\n")
      else:
        out.write("FAIL\n\n")
      out.flush

    # DB
    if self.runTests[self.DB]:
      out.write( "VERIFYING DB (" + self.db_url + ") ...\n" )
      out.flush()
      try:
        url = self.benchmarker.generate_url(self.db_url, self.port)
        output = self.__curl_url(url, self.DB, out, err)
        if self.validateDb(output, out, err):
          self.db_url_passed = True
        else:
          self.db_url_passed = False
      except (AttributeError, subprocess.CalledProcessError) as e:
        self.db_url_passed = False
      out.write("VALIDATING DB ... ")
      if self.db_url_passed:
        out.write("PASS\n\n")
      else:
        out.write("FAIL\n\n")
      out.flush

    # Query
    if self.runTests[self.QUERY]:
      out.write( "VERIFYING QUERY (" + self.query_url + "2) ...\n" )
      out.flush()
      try:
        url = self.benchmarker.generate_url(self.query_url + "2", self.port)
        output = self.__curl_url(url, self.QUERY, out, err)
        if self.validateQuery(output, out, err):
          self.query_url_passed = True
        else:
          self.query_url_passed = False
      except (AttributeError, subprocess.CalledProcessError) as e:
        self.query_url_passed = False
      out.write("VALIDATING QUERY ... ")
      if self.query_url_passed:
        out.write("PASS\n\n")
      else:
        out.write("FAIL\n\n")
      out.flush

    # Fortune
    if self.runTests[self.FORTUNE]:
      out.write( "VERIFYING FORTUNE (" + self.fortune_url + ") ...\n" )
      out.flush()
      try:
        url = self.benchmarker.generate_url(self.fortune_url, self.port)
        output = self.__curl_url(url, self.FORTUNE, out, err)
        if self.validateFortune(output, out, err):
          self.fortune_url_passed = True
        else:
          self.fortune_url_passed = False
      except (AttributeError, subprocess.CalledProcessError) as e:
        self.fortune_url_passed = False
      out.write("VALIDATING FORTUNE ... ")
      if self.fortune_url_passed:
        out.write("PASS\n\n")
      else:
        out.write("FAIL\n\n")
      out.flush

    # Update
    if self.runTests[self.UPDATE]:
      out.write( "VERIFYING UPDATE (" + self.update_url + "2) ...\n" )
      out.flush()
      try:
        url = self.benchmarker.generate_url(self.update_url + "2", self.port)
        output = self.__curl_url(url, self.UPDATE, out, err)
        if self.validateUpdate(output, out, err):
          self.update_url_passed = True
        else:
          self.update_url_passed = False
      except (AttributeError, subprocess.CalledProcessError) as e:
        self.update_url_passed = False
      out.write("VALIDATING UPDATE ... ")
      if self.update_url_passed:
        out.write("PASS\n\n")
      else:
        out.write("FAIL\n\n")
      out.flush

    # plaintext
    if self.runTests[self.PLAINTEXT]:
      out.write( "VERIFYING PLAINTEXT (" + self.plaintext_url + ") ...\n" )
      out.flush()
      try:
        url = self.benchmarker.generate_url(self.plaintext_url, self.port)
        output = self.__curl_url(url, self.PLAINTEXT, out, err)
        if self.validatePlaintext(output, out, err):
          self.plaintext_url_passed = True
        else:
          self.plaintext_url_passed = False
      except (AttributeError, subprocess.CalledProcessError) as e:
        self.plaintext_url_passed = False
      out.write("VALIDATING PLAINTEXT ... ")
      if self.plaintext_url_passed:
        out.write("PASS\n\n")
      else:
        out.write("FAIL\n\n")
      out.flush

  ############################################################
  # End verify_urls
  ############################################################

  ############################################################
  # contains_type(type)
  # true if this test contains an implementation of the given 
  # test type (json, db, etc.)
  ############################################################
  def contains_type(self, type):
    try:
      if type == self.JSON and self.json_url != None:
        return True
      if type == self.DB and self.db_url != None:
        return True
      if type == self.QUERY and self.query_url != None:
        return True
      if type == self.FORTUNE and self.fortune_url != None:
        return True
      if type == self.UPDATE and self.update_url != None:
        return True
      if type == self.PLAINTEXT and self.plaintext_url != None:
        return True
    except AttributeError:
      pass
      
    return False
  ############################################################
  # End stop
  ############################################################

  ############################################################
  # benchmark
  # Runs the benchmark for each type of test that it implements
  # JSON/DB/Query.
  ############################################################
  def benchmark(self, out, err):
    # JSON
    if self.runTests[self.JSON]:
      try:
        if self.benchmarker.type == "all" or self.benchmarker.type == self.JSON:
          out.write("BENCHMARKING JSON ... ") 
          out.flush()
          results = None
          output_file = self.benchmarker.output_file(self.name, self.JSON)
          if not os.path.exists(output_file):
            with open(output_file, 'w'):
              # Simply opening the file in write mode should create the empty file.
              pass
          if self.json_url_passed:
            remote_script = self.__generate_concurrency_script(self.json_url, self.port, self.accept_json)
            self.__run_benchmark(remote_script, output_file, err)
          results = self.__parse_test(self.JSON)
          self.benchmarker.report_results(framework=self, test=self.JSON, results=results['results'])
          out.write( "Complete\n" )
          out.flush()
      except AttributeError:
        pass

    # DB
    if self.runTests[self.DB]:
      try:
        if self.benchmarker.type == "all" or self.benchmarker.type == self.DB:
          out.write("BENCHMARKING DB ... ") 
          out.flush()
          results = None
          output_file = self.benchmarker.output_file(self.name, self.DB)
          if not os.path.exists(output_file):
            with open(output_file, 'w'):
              # Simply opening the file in write mode should create the empty file.
              pass
          if self.db_url_passed:
            remote_script = self.__generate_concurrency_script(self.db_url, self.port, self.accept_json)
            self.__run_benchmark(remote_script, output_file, err)
          results = self.__parse_test(self.DB)
          self.benchmarker.report_results(framework=self, test=self.DB, results=results['results'])
          out.write( "Complete\n" )
      except AttributeError:
        pass

    # Query
    if self.runTests[self.QUERY]:
      try:
        if self.benchmarker.type == "all" or self.benchmarker.type == self.QUERY:
          out.write("BENCHMARKING Query ... ")
          out.flush()
          results = None
          output_file = self.benchmarker.output_file(self.name, self.QUERY)
          if not os.path.exists(output_file):
            with open(output_file, 'w'):
              # Simply opening the file in write mode should create the empty file.
              pass
          if self.query_url_passed:
            remote_script = self.__generate_query_script(self.query_url, self.port, self.accept_json)
            self.__run_benchmark(remote_script, output_file, err)
          results = self.__parse_test(self.QUERY)
          self.benchmarker.report_results(framework=self, test=self.QUERY, results=results['results'])
          out.write( "Complete\n" )
          out.flush()
      except AttributeError:
        pass

    # fortune
    if self.runTests[self.FORTUNE]:
      try:
        if self.benchmarker.type == "all" or self.benchmarker.type == self.FORTUNE:
          out.write("BENCHMARKING Fortune ... ") 
          out.flush()
          results = None
          output_file = self.benchmarker.output_file(self.name, self.FORTUNE)
          if not os.path.exists(output_file):
            with open(output_file, 'w'):
              # Simply opening the file in write mode should create the empty file.
              pass
          if self.fortune_url_passed:
            remote_script = self.__generate_concurrency_script(self.fortune_url, self.port, self.accept_html)
            self.__run_benchmark(remote_script, output_file, err)
          results = self.__parse_test(self.FORTUNE)
          self.benchmarker.report_results(framework=self, test=self.FORTUNE, results=results['results'])
          out.write( "Complete\n" )
          out.flush()
      except AttributeError:
        pass

    # update
    if self.runTests[self.UPDATE]:
      try:
        if self.benchmarker.type == "all" or self.benchmarker.type == self.UPDATE:
          out.write("BENCHMARKING Update ... ") 
          out.flush()
          results = None
          output_file = self.benchmarker.output_file(self.name, self.UPDATE)
          if not os.path.exists(output_file):
            with open(output_file, 'w'):
              # Simply opening the file in write mode should create the empty file.
              pass
          if self.update_url_passed:
            remote_script = self.__generate_query_script(self.update_url, self.port, self.accept_json)
            self.__run_benchmark(remote_script, output_file, err)
          results = self.__parse_test(self.UPDATE)
          self.benchmarker.report_results(framework=self, test=self.UPDATE, results=results['results'])
          out.write( "Complete\n" )
          out.flush()
      except AttributeError:
        pass

    # plaintext
    if self.runTests[self.PLAINTEXT]:
      try:
        if self.benchmarker.type == "all" or self.benchmarker.type == self.PLAINTEXT:
          out.write("BENCHMARKING Plaintext ... ")
          out.flush()
          results = None
          output_file = self.benchmarker.output_file(self.name, self.PLAINTEXT)
          if not os.path.exists(output_file):
            with open(output_file, 'w'):
              # Simply opening the file in write mode should create the empty file.
              pass
          if self.plaintext_url_passed:
            remote_script = self.__generate_concurrency_script(self.plaintext_url, self.port, self.accept_plaintext, wrk_command="wrk-pipeline", intervals=[256,1024,4096,16384], pipeline="--pipeline 16")
            self.__run_benchmark(remote_script, output_file, err)
          results = self.__parse_test(self.PLAINTEXT)
          self.benchmarker.report_results(framework=self, test=self.PLAINTEXT, results=results['results'])
          out.write( "Complete\n" )
          out.flush()
      except AttributeError:
        traceback.print_exc()
        pass

  ############################################################
  # End benchmark
  ############################################################
  
  ############################################################
  # parse_all
  # Method meant to be run for a given timestamp
  ############################################################
  def parse_all(self):
    # JSON
    if os.path.exists(self.benchmarker.get_output_file(self.name, self.JSON)):
      results = self.__parse_test(self.JSON)
      self.benchmarker.report_results(framework=self, test=self.JSON, results=results['results'])
    
    # DB
    if os.path.exists(self.benchmarker.get_output_file(self.name, self.DB)):
      results = self.__parse_test(self.DB)
      self.benchmarker.report_results(framework=self, test=self.DB, results=results['results'])
    
    # Query
    if os.path.exists(self.benchmarker.get_output_file(self.name, self.QUERY)):
      results = self.__parse_test(self.QUERY)
      self.benchmarker.report_results(framework=self, test=self.QUERY, results=results['results'])

    # Fortune
    if os.path.exists(self.benchmarker.get_output_file(self.name, self.FORTUNE)):
      results = self.__parse_test(self.FORTUNE)
      self.benchmarker.report_results(framework=self, test=self.FORTUNE, results=results['results'])

    # Update
    if os.path.exists(self.benchmarker.get_output_file(self.name, self.UPDATE)):
      results = self.__parse_test(self.UPDATE)
      self.benchmarker.report_results(framework=self, test=self.UPDATE, results=results['results'])

    # Plaintext
    if os.path.exists(self.benchmarker.get_output_file(self.name, self.PLAINTEXT)):
      results = self.__parse_test(self.PLAINTEXT)
      self.benchmarker.report_results(framework=self, test=self.PLAINTEXT, results=results['results'])
  ############################################################
  # End parse_all
  ############################################################

  ############################################################
  # __parse_test(test_type)
  ############################################################
  def __parse_test(self, test_type):
    try:
      results = dict()
      results['results'] = []
      
      if os.path.exists(self.benchmarker.get_output_file(self.name, test_type)):
        with open(self.benchmarker.output_file(self.name, test_type)) as raw_data:
          is_warmup = True
          rawData = None
          for line in raw_data:

            if "Queries:" in line or "Concurrency:" in line:
              is_warmup = False
              rawData = None
              continue
            if "Warmup" in line or "Primer" in line:
              is_warmup = True
              continue

            if not is_warmup:
              if rawData == None:
                rawData = dict()
                results['results'].append(rawData)

              #if "Requests/sec:" in line:
              #  m = re.search("Requests/sec:\s+([0-9]+)", line)
              #  rawData['reportedResults'] = m.group(1)
                
              # search for weighttp data such as succeeded and failed.
              if "Latency" in line:
                m = re.findall("([0-9]+\.*[0-9]*[us|ms|s|m|%]+)", line)
                if len(m) == 4:
                  rawData['latencyAvg'] = m[0]
                  rawData['latencyStdev'] = m[1]
                  rawData['latencyMax'] = m[2]
              #    rawData['latencyStdevPercent'] = m[3]
              
              #if "Req/Sec" in line:
              #  m = re.findall("([0-9]+\.*[0-9]*[k|%]*)", line)
              #  if len(m) == 4:
              #    rawData['requestsAvg'] = m[0]
              #    rawData['requestsStdev'] = m[1]
              #    rawData['requestsMax'] = m[2]
              #    rawData['requestsStdevPercent'] = m[3]
                
              #if "requests in" in line:
              #  m = re.search("requests in ([0-9]+\.*[0-9]*[ms|s|m|h]+)", line)
              #  if m != None: 
              #    # parse out the raw time, which may be in minutes or seconds
              #    raw_time = m.group(1)
              #    if "ms" in raw_time:
              #      rawData['total_time'] = float(raw_time[:len(raw_time)-2]) / 1000.0
              #    elif "s" in raw_time:
              #      rawData['total_time'] = float(raw_time[:len(raw_time)-1])
              #    elif "m" in raw_time:
              #      rawData['total_time'] = float(raw_time[:len(raw_time)-1]) * 60.0
              #    elif "h" in raw_time:
              #      rawData['total_time'] = float(raw_time[:len(raw_time)-1]) * 3600.0
             
              if "requests in" in line:
                m = re.search("([0-9]+) requests in", line)
                if m != None: 
                  rawData['totalRequests'] = int(m.group(1))
              
              if "Socket errors" in line:
                if "connect" in line:
                  m = re.search("connect ([0-9]+)", line)
                  rawData['connect'] = int(m.group(1))
                if "read" in line:
                  m = re.search("read ([0-9]+)", line)
                  rawData['read'] = int(m.group(1))
                if "write" in line:
                  m = re.search("write ([0-9]+)", line)
                  rawData['write'] = int(m.group(1))
                if "timeout" in line:
                  m = re.search("timeout ([0-9]+)", line)
                  rawData['timeout'] = int(m.group(1))
              
              if "Non-2xx" in line:
                m = re.search("Non-2xx or 3xx responses: ([0-9]+)", line)
                if m != None: 
                  rawData['5xx'] = int(m.group(1))
              

      return results
    except IOError:
      return None
  ############################################################
  # End benchmark
  ############################################################

  ##########################################################################################
  # Private Methods
  ##########################################################################################

  ############################################################
  # __run_benchmark(script, output_file)
  # Runs a single benchmark using the script which is a bash 
  # template that uses weighttp to run the test. All the results
  # outputed to the output_file.
  ############################################################
  def __run_benchmark(self, script, output_file, err):
    with open(output_file, 'w') as raw_file:
	  
      p = subprocess.Popen(self.benchmarker.client_ssh_string.split(" "), stdin=subprocess.PIPE, stdout=raw_file, stderr=err)
      p.communicate(script)
      err.flush()
  ############################################################
  # End __run_benchmark
  ############################################################

  ############################################################
  # __generate_concurrency_script(url, port)
  # Generates the string containing the bash script that will
  # be run on the client to benchmark a single test. This
  # specifically works for the variable concurrency tests (JSON
  # and DB)
  ############################################################
  def __generate_concurrency_script(self, url, port, accept_header, wrk_command="wrk", intervals=[], pipeline=""):
    if len(intervals) == 0:
      intervals = self.benchmarker.concurrency_levels
    headers = self.__get_request_headers(accept_header)
    return self.concurrency_template.format(max_concurrency=self.benchmarker.max_concurrency, 
      max_threads=self.benchmarker.max_threads, name=self.name, duration=self.benchmarker.duration, 
      interval=" ".join("{}".format(item) for item in intervals), 
      server_host=self.benchmarker.server_host, port=port, url=url, headers=headers, wrk=wrk_command,
      pipeline=pipeline)
  ############################################################
  # End __generate_concurrency_script
  ############################################################

  ############################################################
  # __generate_query_script(url, port)
  # Generates the string containing the bash script that will
  # be run on the client to benchmark a single test. This
  # specifically works for the variable query tests (Query)
  ############################################################
  def __generate_query_script(self, url, port, accept_header):
    headers = self.__get_request_headers(accept_header)
    return self.query_template.format(max_concurrency=self.benchmarker.max_concurrency, 
      max_threads=self.benchmarker.max_threads, name=self.name, duration=self.benchmarker.duration, 
      interval=" ".join("{}".format(item) for item in self.benchmarker.query_intervals), 
      server_host=self.benchmarker.server_host, port=port, url=url, headers=headers)
  ############################################################
  # End __generate_query_script
  ############################################################

  ############################################################
  # __get_request_headers(accept_header)
  # Generates the complete HTTP header string
  ############################################################
  def __get_request_headers(self, accept_header):
    return self.headers_template.format(accept=accept_header)
  ############################################################
  # End __format_request_headers
  ############################################################

  ############################################################
  # __curl_url
  # Dump HTTP response and headers. Throw exception if there
  # is an HTTP error.
  ############################################################
  def __curl_url(self, url, testType, out, err):
    # Use -i to output response with headers.
    # Don't use -f so that the HTTP response code is ignored.
    # Use --stderr - to redirect stderr to stdout so we get
    # error output for sure in stdout.
    # Use -sS to hide progress bar, but show errors.
    subprocess.check_call(["curl", "-i", "-sS", url], stderr=err, stdout=out)
    out.flush()
    err.flush()
    # HTTP output may not end in a newline, so add that here.
    out.write( "\n" )
    out.flush()

    # We need to get the respond body from the curl and return it.
    p = subprocess.Popen(["curl", "-s", url], stdout=subprocess.PIPE)
    output = p.communicate()

    # In the curl invocation above we could not use -f because
    # then the HTTP response would not be output, so use -f in
    # an additional invocation so that if there is an HTTP error,
    # subprocess.CalledProcessError will be thrown. Note that this
    # uses check_output() instead of check_call() so that we can
    # ignore the HTTP response because we already output that in
    # the first curl invocation.
    subprocess.check_output(["curl", "-fsS", url], stderr=err)
    err.flush()
    # HTTP output may not end in a newline, so add that here.
    out.write( "\n" )
    out.flush()
    if output:
      # We have the response body - return it
      return output[0]
  ##############################################################
  # End __curl_url
  ##############################################################

  ##########################################################################################
  # Constructor
  ##########################################################################################  
  def __init__(self, name, directory, benchmarker, runTests, args):
    self.name = name
    self.directory = directory
    self.benchmarker = benchmarker
    self.runTests = runTests
    self.__dict__.update(args)

    # ensure directory has __init__.py file so that we can use it as a Python package
    if not os.path.exists(os.path.join(directory, "__init__.py")):
      open(os.path.join(directory, "__init__.py"), 'w').close()

    self.setup_module = setup_module = importlib.import_module(directory + '.' + self.setup_file)
  ############################################################
  # End __init__
  ############################################################
############################################################
# End FrameworkTest
############################################################

##########################################################################################
# Static methods
##########################################################################################

##############################################################
# parse_config(config, directory, benchmarker)
# parses a config file and returns a list of FrameworkTest
# objects based on that config file.
##############################################################
def parse_config(config, directory, benchmarker):
  tests = []

  # The config object can specify multiple tests, we neep to loop
  # over them and parse them out
  for test in config['tests']:
    for key, value in test.iteritems():
      test_name = config['framework']
      
      runTests = dict()
      runTests["json"] = True if value.get("json_url", False) else False
      runTests["db"] = True if value.get("db_url", False) else False
      runTests["query"] = True if value.get("query_url", False) else False
      runTests["fortune"] = True if value.get("fortune_url", False) else False
      runTests["update"] = True if value.get("update_url", False) else False
      runTests["plaintext"] = True if value.get("plaintext_url", False) else False

      # if the test uses the 'defualt' keywork, then we don't 
      # append anything to it's name. All configs should only have 1 default
      if key != 'default':
        # we need to use the key in the test_name
        test_name = test_name + "-" + key

      tests.append(FrameworkTest(test_name, directory, benchmarker, runTests, value))

  return tests
##############################################################
# End parse_config
##############################################################