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#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
"""
Bridges between Python and Java, to provide a simpler and more Pythonesque environment.
Certified to be free of dead parrots.
"""
# Imports
from java.lang import *
import org.amqp.blaze.management.jmx.AMQConsole as AMQConsole
import org.amqp.blaze.stac.jmx.MBeanServerConnectionContext as MBeanServerConnectionContext
# Globals
commandPrompt = ""
proxied = 0
connected = 0
amqConsole = None
connectionContext = None
# Functions
def connect(url="", username="", password=""):
"""
Connects to an AMQP broker. The URL must be in the form amq://host:port/context
"""
try:
global connected
global connectionContext
if connected==1:
print "Already Connected!"
return
try:
parsedURL = parseURL(url)
except URLFormatError, ufe:
print "Invalid URL: " + ufe.msg
return
amqConsole = AMQConsole(parsedURL['host'], parsedURL['port'], username, password, parsedURL['context'])
amqConsole.initialise()
amqConsole.registerAllMBeans()
connectionContext = MBeanServerConnectionContext()
connectionContext.connect()
connected = 1
except Exception, e:
updateGlobals()
print e
e.printStackTrace()
cause = e.getCause()
if cause != None:
cause.printStackTrace()
else:
updateGlobals();
def disconnect():
"""
Disconnects from the broker
"""
global connected
global connectionContext
if connected==0:
print "Not connected!"
return
try:
connectionContext.disconnect()
connected = 0
except Exception, e:
updateGlobals()
print e
else:
updateGlobals()
def quit():
global connected
if connected != 0:
disconnect()
def ls():
"""
Lists the current mbean
"""
global connected
if connected == 0:
print "Not connected!"
return
connectionContext.ls()
def cd(beanName):
"""
Changes the current mbean
"""
global connected
global connectionContext
if connected == 0:
print "Not connected!"
return
try:
connectionContext.cd(beanName)
except Exception, e:
updateGlobals()
msg = "Error: " + e.getMessage()
print msg
else:
updateGlobals()
def invoke(methodName):
"""
Invokes an operation of the current mbean
"""
global connected
global connectionContext
if connected == 0:
print "Not connected!"
return
try:
connectionContext.invoke(methodName, None)
except Exception, e:
updateGlobals()
msg = "Error: " + e.getMessage()
print msg
else:
updateGlobals()
class URLFormatError(Exception):
"""Exception raised for errors in format of the URL
Attributes:
expression -- input expression in which the error occurred
message -- explanation of the error
"""
def __init__(self, url, message):
self.url = url
self.msg = message
def parseURL(url):
"""
Parses an AMQ URL into host, port and context components returning them in a dictionary
"""
idx = url.find("amq://")
errorMsg = "Invalid URL - must be format amq://hostname:port/vhost"
if idx != 0:
raise URLFormatError(url, errorMsg)
hostEndIdx = url.find(":", 6)
if hostEndIdx == -1:
raise URLFormatError(url, errorMsg)
hostname = url[6:hostEndIdx]
portIdx = url.find("/", hostEndIdx + 1)
port = url[hostEndIdx + 1:portIdx]
vhost = url[portIdx + 1:]
if portIdx == -1:
raise URLFormatError(url, errorMsg)
return {'host':hostname,'port':int(port),'context':vhost}
def updateGlobals():
global commandPrompt
global connectionContext
if connected == 1:
commandPrompt = "AMQ:connected#" + connectionContext.getCurrentMBean().getAttributeValue("name", "java.lang.String") + "> "
else:
commandPrompt = "AMQ:disconnected> "
# Classes
# Global execution
# Update all the global variables - this is called to sync everything at the start
updateGlobals()
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