例: 詳細なパラメーターを指定したサービスの公開

サービスを最初に公開するときに、サービス プロパティの詳細な制御が必要となる場合もあります。このような場合は、JSON (JavaScript Object Notation) を使用してサービス パラメーターのリストをテキスト ファイルに出力します。続いて、ArcGIS REST API の createService メソッドを呼び出して、ファイルから読み取った JSON を渡します。

マップ サービスの場合は、マップ サービス定義 (MSD) ファイルを JSON に指定する必要があります。このファイルは ArcMap ドキュメント (MXD) から、ArcGIS Server で認識および描画可能な形式で情報を合成します。サービスの作成に進む前に、arcpy.mapping モジュールを使用してマップを解析し、MSD を作成する必要があります。この処理には、ArcGIS Desktop がライセンスされたコンピューターが必要です。その他のサービス タイプでは、arcpy.mapping の使用または MSD の作成は必要ありません。

次に、JSON ファイルの例を示します。別のサービス タイプでの JSON ファイルの詳細な作成例については、ArcGIS REST API のリファレンスをご参照ください。

{  "serviceName": "Beirut",  "type": "MapServer",  "description": "Service showing Beirut parcels and streets.",  "capabilities": "Map,Query,Data",  "clusterName": "default",  "minInstancesPerNode": 1,  "maxInstancesPerNode": 3,  "instancesPerContainer": 1,  "maxWaitTime": 60,  "maxStartupTime": 300,  "maxIdleTime": 1800,  "maxUsageTime": 600,  "loadBalancing": "ROUND_ROBIN",  "isolationLevel": "HIGH",  "configuredState": "STARTED",  "recycleInterval": 24,  "recycleStartTime": "00:00",  "keepAliveInterval": 1800,  "private": false,  "isDefault": false,  "properties": {    "maxBufferCount": "100",    "maxImageHeight": "2048",    "maxRecordCount": "1000",    "filePath": "c:\\data\\Beirut\\Beirut_Parcels.msd",    "maxImageWidth": "2048",    "enableDynamicLayers": "false",    "cacheOnDemand": "false",    "dynamicDataWorkspaces": "",    "useLocalCacheDir": "true",    "outputDir": "c:\\arcgisserver\\directories\\arcgisoutput",    "virtualOutputDir": "/rest/directories/arcgisoutput",    "supportedImageReturnTypes": "URL",    "isCached": "false",    "ignoreCache": "false",    "clientCachingAllowed": "true",    "cacheDir": ""  },  "extensions": [],  "datasets": []}

以下のコードは、サービスを公開するときに、この JSON ファイルの内容を Python スクリプトで参照する方法を示しています。

# Demonstrates how to publish a service from a JSON definition file
# An MSD file is required, which is made from the MXD in this script

# For Http calls
import httplib, urllib, json, arcpy, os

# For system tools
import sys

# For reading passwords without echoing
import getpass


# Defines the entry point into the script

def main(argv=None):
    # Print some info
    print
    print "This tool is a sample script that publishes a service using an MXD and JSON definiton."
    print
    
    # Ask for admin/publisher user name and password
    username = raw_input("Enter user name: ")
    password = getpass.getpass("Enter password: ")

    # Ask for other necessary information
    serverName = raw_input("Enter Server name: ")
    serverPort = 6080
    mxdPath = raw_input("Enter the path to the MXD: ")
    msdPath = raw_input("Enter the desired path for the MSD: ")
    jsonPath = raw_input("Enter the path to the JSON file: ")

    # Analyze MXD and create MSD file
    if not os.path.isfile(mxdPath):
        return

    if mxdPath.endswith('.mxd'):
        mapErrors = analyzeMap(mxdPath)
        if len(mapErrors) > 0:
            print "Fix map errors before converting to mxd"
            return
        mxd = arcpy.mapping.MapDocument(mxdPath)
        convertMap(mxd, msdPath);
        del mxd  
    else:
        print "Invalid file type submitted"
        return

    # Get a token
    token = getToken(username, password, serverName, serverPort)
    if token == "":
        print "Could not generate a token with the username and password provided."
        return

    # Read the JSON file for the service
    serviceJSON = open(jsonPath).read()
    
    # Construct URL to create a service
    # If publishing to a folder, invoke createService on the folder URL
    createServiceURL = "/arcgis/admin/services/createService"
    
    # This request needs the token, the JSON defining the service properties,
    #  and the response format 
    params = urllib.urlencode({'token': token, 'service':serviceJSON, 'f': 'json'})
    
    headers = {"Content-type": "application/x-www-form-urlencoded", "Accept": "text/plain"}
    
    # Connect to URL and post parameters    
    httpConn = httplib.HTTPConnection(serverName, serverPort)
    httpConn.request("POST", createServiceURL, params, headers)
    
    # Read response
    response = httpConn.getresponse()
    if (response.status != 200):
        httpConn.close()
        print "Error while creating the service."
        return
    else:
        data = response.read()
        httpConn.close()
        
        # Check that data returned is not an error object
        if not assertJsonSuccess(data):          
            print "Error returned by operation. " + data
        else:
            print "Operation completed successfully!"
        
        return

# A function to analyze a map document
def analyzeMap(mapPath):
    mxd = arcpy.mapping.MapDocument(mapPath)
    analysis = arcpy.mapping.AnalyzeForMSD(mxd)

    vars = analysis['errors']
    for ((message, code), layerlist) in vars.iteritems():
      print "Errors: "
      print message, " (CODE %i)" % code
      print "       applies to the following layers:",
      for layer in layerlist:
          print layer.name,
      print
        
    del mxd
    return analysis['errors']

# A function to convert a map document to a map service definition (MSD)
def convertMap(mxd, msd):
    arcpy.mapping.ConvertToMSD(mxd, msd, "USE_ACTIVE_VIEW", "NORMAL", "NORMAL")
    del mxd, msd

# A function to generate a token given username, password and the adminURL.
def getToken(username, password, serverName, serverPort):
    # Token URL is typically http://server[:port]/arcgis/admin/generateToken
    tokenURL = "/arcgis/admin/generateToken"
    
    # URL-encode the token parameters
    params = urllib.urlencode({'username': username, 'password': password, 'client': 'requestip', 'f': 'json'})
    
    headers = {"Content-type": "application/x-www-form-urlencoded", "Accept": "text/plain"}
    
    # Connect to URL and post parameters
    httpConn = httplib.HTTPConnection(serverName, serverPort)
    httpConn.request("POST", tokenURL, params, headers)
    
    # Read response
    response = httpConn.getresponse()
    if (response.status != 200):
        httpConn.close()
        print "Error while fetching tokens from admin URL. Please check the URL and try again."
        return
    else:
        data = response.read()
        httpConn.close()
        
        # Check that data returned is not an error object
        if not assertJsonSuccess(data):            
            return
        
        # Extract the token from it
        token = json.loads(data)        
        return token['token']            
        

# A function that checks that the input JSON object 
#  is not an error object.
    
def assertJsonSuccess(data):
    obj = json.loads(data)
    if 'status' in obj and obj['status'] == "error":
        print "Error: JSON object returns an error. " + str(obj)
        return False
    else:
        return True
    
        
# Script start
if __name__ == "__main__":
    sys.exit(main(sys.argv[1:]))