Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
AbstractJmxSupport |
|
| 3.0;3 |
1 | /* | |
2 | * $Id: AbstractJmxSupport.java 7976 2007-08-21 14:26:13Z dirk.olmes $ | |
3 | * -------------------------------------------------------------------------------------- | |
4 | * Copyright (c) MuleSource, Inc. All rights reserved. http://www.mulesource.com | |
5 | * | |
6 | * The software in this package is published under the terms of the CPAL v1.0 | |
7 | * license, a copy of which has been included with this distribution in the | |
8 | * LICENSE.txt file. | |
9 | */ | |
10 | package org.mule.management.support; | |
11 | ||
12 | import org.mule.MuleManager; | |
13 | import org.mule.util.StringUtils; | |
14 | ||
15 | import java.util.Collection; | |
16 | import java.util.List; | |
17 | ||
18 | import javax.management.MBeanServer; | |
19 | import javax.management.MBeanServerFactory; | |
20 | ||
21 | 0 | public abstract class AbstractJmxSupport implements JmxSupport |
22 | { | |
23 | ||
24 | /** | |
25 | * Resolve JMX domain clash by adding an incremented number suffix to the name. E.g. if | |
26 | * 'Mule.TradeProcessor' is already registered with the accessible MBeanServer, will return | |
27 | * 'Mule.TradeProcessor.1'. If the latter one is already registered, will return | |
28 | * 'Mule.TradeProcessor.2' and so on. | |
29 | * <p/> | |
30 | * If no clash detected, returns the domain name unmodified. | |
31 | * @param domain domain name causing a conflict | |
32 | * @return resolved non-conflicting domain name | |
33 | */ | |
34 | protected String resolveDomainClash(String domain) | |
35 | { | |
36 | 0 | List servers = MBeanServerFactory.findMBeanServer(null); |
37 | 0 | if (servers.isEmpty()) |
38 | { | |
39 | 0 | throw new IllegalStateException("MBeanServer is not available."); |
40 | } | |
41 | 0 | MBeanServer server = (MBeanServer) servers.get(0); |
42 | ||
43 | 0 | Collection registeredDomains = getDomains(server); |
44 | 0 | int counter = 1; |
45 | // Just append .<n> suffix to the domain for a start | |
46 | 0 | if (registeredDomains.contains(domain)) |
47 | { | |
48 | 0 | domain += "." + counter; |
49 | } | |
50 | // recheck in case there were any suffixed domains already | |
51 | 0 | while (registeredDomains.contains(domain)) |
52 | { | |
53 | // append .<n> until we succeed | |
54 | 0 | domain = domain.substring(0, domain.lastIndexOf(".") + 1) + ++counter; |
55 | } | |
56 | ||
57 | 0 | return domain; |
58 | } | |
59 | ||
60 | /** | |
61 | * List all domains of this MBean server. | |
62 | * @param server server to contact | |
63 | * @return a collection of unique JMX domains | |
64 | */ | |
65 | protected abstract Collection getDomains(MBeanServer server); | |
66 | ||
67 | /** {@inheritDoc} */ | |
68 | public String getDomainName() | |
69 | { | |
70 | // TODO add some config options to the JmxAgent | |
71 | 0 | String domain = DEFAULT_JMX_DOMAIN_PREFIX; |
72 | 0 | String instanceId = StringUtils.defaultString(MuleManager.getInstance().getId()); |
73 | 0 | if (instanceId.length() > 0) |
74 | { | |
75 | 0 | domain += "." + instanceId; |
76 | } | |
77 | ||
78 | 0 | JmxRegistrationContext ctx = JmxRegistrationContext.getCurrent(); |
79 | ||
80 | 0 | String resolvedDomain = ctx.getResolvedDomain(); |
81 | 0 | if (StringUtils.isBlank(resolvedDomain)) |
82 | { | |
83 | 0 | domain = resolveDomainClash(domain); |
84 | 0 | ctx.setResolvedDomain(domain); |
85 | } | |
86 | ||
87 | 0 | return domain; |
88 | } | |
89 | } |