'''
  Export and Import ElasticSearch Data.
  Simple Example At __main__
  @author: wgzh159@163.com
  @note: uncheck consistency of data, please do it by self
'''
 
import json
import os
import sys
import time
import urllib2
 
reload(sys)
sys.setdefaultencoding('utf-8') # @UndefinedVariable
 
class exportEsData():
  size = 10000
  def __init__(self, url,index,type):
    self.url = url+"/"+index+"/"+type+"/_search"
    self.index = index
    self.type = type
  def exportData(self):
    print("export data begin...")
    begin = time.time()
    try:
      os.remove(self.index+"_"+self.type+".json")
    except:
      os.mknod(self.index+"_"+self.type+".json")
    msg = urllib2.urlopen(self.url).read()
    print(msg)
    obj = json.loads(msg)
    num = obj["hits"]["total"]
    start = 0
    end = num/self.size+1
    while(start<end):
      msg = urllib2.urlopen(self.url+"?from="+str(start*self.size)+"&size="+str(self.size)).read()
      self.writeFile(msg)
      start=start+1
    print("export data end!!!\n\t total consuming time:"+str(time.time()-begin)+"s")
  def writeFile(self,msg):
    obj = json.loads(msg)
    vals = obj["hits"]["hits"]
    try:
      f = open(self.index+"_"+self.type+".json","a")
      for val in vals:
        a = json.dumps(val["_source"],ensure_ascii=False)
        f.write(a+"\n")
    finally:
      f.flush()
      f.close()
 
class importEsData():
  def __init__(self,url,index,type):
    self.url = url+"/"+index+"/"+type
    self.index = index
    self.type = type
     
  def importData(self):
    print("import data begin...")
    begin = time.time()
    try:
      f = open(self.index+"_"+self.type+".json","r")
      for line in f:
        self.post(line)
    finally:
      f.close()
    print("import data end!!!\n\t total consuming time:"+str(time.time()-begin)+"s")
  def post(self,data):
    req = urllib2.Request(self.url,data,{"Content-Type":"application/json; charset=UTF-8"})
    urllib2.urlopen(req)
 
if __name__ == '__main__':
  '''
    Export Data
    e.g.
              URL          index    type
    exportEsData("http://10.100.142.60:9200","watchdog","mexception").exportData()
     
    export file name: watchdog_mexception.json
  '''
  #exportEsData("http://10.100.142.60:9200","watchdog","mexception").exportData()
  exportEsData("http://10.100.142.60:9200","watchdog","mexception").exportData()
   
   
  '''
    Import Data
     
    *import file name:watchdog_test.json  (important)
          "_" front part represents the elasticsearch index
          "_" after part represents the elasticsearch type
    e.g.
              URL          index    type
    mportEsData("http://10.100.142.60:9200","watchdog","test").importData()
  '''
  #importEsData("http://10.100.142.60:9200","watchdog","test").importData()
  importEsData("http://10.100.142.60:9200","watchdog","test").importData()