1 /*
2 * collectd/java - org/collectd/java/GenericJMXConfConnection.java
3 * Copyright (C) 2009-2012 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Florian octo Forster <octo at collectd.org>
20 */
22 package org.collectd.java;
24 import java.util.List;
25 import java.util.Map;
26 import java.util.Iterator;
27 import java.util.ArrayList;
28 import java.util.HashMap;
29 import java.net.InetAddress;
30 import java.net.UnknownHostException;
32 import javax.management.MBeanServerConnection;
33 import javax.management.ObjectName;
34 import javax.management.MalformedObjectNameException;
36 import javax.management.remote.JMXServiceURL;
37 import javax.management.remote.JMXConnector;
38 import javax.management.remote.JMXConnectorFactory;
40 import org.collectd.api.Collectd;
41 import org.collectd.api.PluginData;
42 import org.collectd.api.OConfigValue;
43 import org.collectd.api.OConfigItem;
45 class GenericJMXConfConnection
46 {
47 private String _username = null;
48 private String _password = null;
49 private String _host = null;
50 private String _instance_prefix = null;
51 private String _service_url = null;
52 private MBeanServerConnection _jmx_connection = null;
53 private List<GenericJMXConfMBean> _mbeans = null;
55 /*
56 * private methods
57 */
58 private String getConfigString (OConfigItem ci) /* {{{ */
59 {
60 List<OConfigValue> values;
61 OConfigValue v;
63 values = ci.getValues ();
64 if (values.size () != 1)
65 {
66 Collectd.logError ("GenericJMXConfConnection: The " + ci.getKey ()
67 + " configuration option needs exactly one string argument.");
68 return (null);
69 }
71 v = values.get (0);
72 if (v.getType () != OConfigValue.OCONFIG_TYPE_STRING)
73 {
74 Collectd.logError ("GenericJMXConfConnection: The " + ci.getKey ()
75 + " configuration option needs exactly one string argument.");
76 return (null);
77 }
79 return (v.getString ());
80 } /* }}} String getConfigString */
82 private String getHost () /* {{{ */
83 {
84 if (this._host != null)
85 {
86 return (this._host);
87 }
89 try
90 {
91 InetAddress localHost = InetAddress.getLocalHost();
92 return (localHost.getHostName ());
93 }
94 catch (UnknownHostException e)
95 {
96 return ("localhost");
97 }
98 } /* }}} String getHost */
100 private void connect () /* {{{ */
101 {
102 JMXServiceURL service_url;
103 JMXConnector connector;
104 Map environment;
106 if (_jmx_connection != null)
107 return;
109 environment = null;
110 if (this._password != null)
111 {
112 String[] credentials;
114 if (this._username == null)
115 this._username = new String ("monitorRole");
117 credentials = new String[] { this._username, this._password };
119 environment = new HashMap ();
120 environment.put (JMXConnector.CREDENTIALS, credentials);
121 }
123 try
124 {
125 service_url = new JMXServiceURL (this._service_url);
126 connector = JMXConnectorFactory.connect (service_url, environment);
127 _jmx_connection = connector.getMBeanServerConnection ();
128 }
129 catch (Exception e)
130 {
131 Collectd.logError ("GenericJMXConfConnection: "
132 + "Creating MBean server connection failed: " + e);
133 return;
134 }
135 } /* }}} void connect */
137 /*
138 * public methods
139 *
140 * <Connection>
141 * Host "tomcat0.mycompany"
142 * ServiceURL "service:jmx:rmi:///jndi/rmi://localhost:17264/jmxrmi"
143 * Collect "java.lang:type=GarbageCollector,name=Copy"
144 * Collect "java.lang:type=Memory"
145 * </Connection>
146 *
147 */
148 public GenericJMXConfConnection (OConfigItem ci) /* {{{ */
149 throws IllegalArgumentException
150 {
151 List<OConfigItem> children;
152 Iterator<OConfigItem> iter;
154 this._mbeans = new ArrayList<GenericJMXConfMBean> ();
156 children = ci.getChildren ();
157 iter = children.iterator ();
158 while (iter.hasNext ())
159 {
160 OConfigItem child = iter.next ();
162 if (child.getKey ().equalsIgnoreCase ("Host"))
163 {
164 String tmp = getConfigString (child);
165 if (tmp != null)
166 this._host = tmp;
167 }
168 else if (child.getKey ().equalsIgnoreCase ("User"))
169 {
170 String tmp = getConfigString (child);
171 if (tmp != null)
172 this._username = tmp;
173 }
174 else if (child.getKey ().equalsIgnoreCase ("Password"))
175 {
176 String tmp = getConfigString (child);
177 if (tmp != null)
178 this._password = tmp;
179 }
180 else if (child.getKey ().equalsIgnoreCase ("ServiceURL"))
181 {
182 String tmp = getConfigString (child);
183 if (tmp != null)
184 this._service_url = tmp;
185 }
186 else if (child.getKey ().equalsIgnoreCase ("InstancePrefix"))
187 {
188 String tmp = getConfigString (child);
189 if (tmp != null)
190 this._instance_prefix = tmp;
191 }
192 else if (child.getKey ().equalsIgnoreCase ("Collect"))
193 {
194 String tmp = getConfigString (child);
195 if (tmp != null)
196 {
197 GenericJMXConfMBean mbean;
199 mbean = GenericJMX.getMBean (tmp);
200 if (mbean == null)
201 throw (new IllegalArgumentException ("No such MBean defined: "
202 + tmp + ". Please make sure all `MBean' blocks appear "
203 + "before (above) all `Connection' blocks."));
204 Collectd.logDebug ("GenericJMXConfConnection: " + this._host + ": Add " + tmp);
205 this._mbeans.add (mbean);
206 }
207 }
208 else
209 throw (new IllegalArgumentException ("Unknown option: "
210 + child.getKey ()));
211 }
213 if (this._service_url == null)
214 throw (new IllegalArgumentException ("No service URL was defined."));
215 if (this._mbeans.size () == 0)
216 throw (new IllegalArgumentException ("No valid collect statement "
217 + "present."));
218 } /* }}} GenericJMXConfConnection (OConfigItem ci) */
220 public void query () /* {{{ */
221 {
222 PluginData pd;
224 connect ();
226 if (this._jmx_connection == null)
227 return;
229 Collectd.logDebug ("GenericJMXConfConnection.query: "
230 + "Reading " + this._mbeans.size () + " mbeans from "
231 + ((this._host != null) ? this._host : "(null)"));
233 pd = new PluginData ();
234 pd.setHost (this.getHost ());
235 pd.setPlugin ("GenericJMX");
237 for (int i = 0; i < this._mbeans.size (); i++)
238 {
239 int status;
241 status = this._mbeans.get (i).query (this._jmx_connection, pd,
242 this._instance_prefix);
243 if (status != 0)
244 {
245 this._jmx_connection = null;
246 return;
247 }
248 } /* for */
249 } /* }}} void query */
251 public String toString ()
252 {
253 return (new String ("host = " + this._host + "; "
254 + "url = " + this._service_url));
255 }
256 }
258 /* vim: set sw=2 sts=2 et fdm=marker : */