在Python的gevent框架下执行异步的Solr查询的教程

import requests
 
#Search 1
solrResp = requests.get('http://mysolr.com/solr/statedecoded/search?q=law')
 
for doc in solrResp.json()['response']['docs']:
  print doc['catch_line']
 
#Search 2
solrResp = requests.get('http://mysolr.com/solr/statedecoded/search?q=shoplifting')
 
for doc in solrResp.json()['response']['docs']:
  print doc['catch_line']

import requests
from gevent import monkey
import gevent
monkey.patch_all()
 
 
class Searcher(object):
  """ Simple wrapper for doing a search and collecting the
    results """
  def __init__(self, searchUrl):
    self.searchUrl = searchUrl
 
  def search(self):
    solrResp = requests.get(self.searchUrl)
    self.docs = solrResp.json()['response']['docs']
 
 
def searchMultiple(urls):
  """ Use gevent to execute the passed in urls;
    dump the results"""
  searchers = [Searcher(url) for url in urls]
 
  # Gather a handle for each task
  handles = []
  for searcher in searchers:
    handles.append(gevent.spawn(searcher.search))
 
  # Block until all work is done
  gevent.joinall(handles)
 
  # Dump the results
  for searcher in searchers:
    print "Search Results for %s" % searcher.searchUrl
    for doc in searcher.docs:
      print doc['catch_line']
 
searchUrls = ['http://mysolr.com/solr/statedecoded/search?q=law',
       'http://mysolr.com/solr/statedecoded/search?q=shoplifting']

# Gather a handle for each task
handles = []
for searcher in searchers:
  handles.append(gevent.spawn(searcher.search))
 
# Block until all work is done
gevent.joinall(handles)