1 /*
2 * collectd/java - org/collectd/java/GenericJMXConfValue.java
3 * Copyright (C) 2009 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 verplant.org>
20 */
22 package org.collectd.java;
24 import java.util.Arrays;
25 import java.util.List;
26 import java.util.Set;
27 import java.util.Iterator;
28 import java.util.ArrayList;
30 import java.math.BigDecimal;
31 import java.math.BigInteger;
33 import javax.management.MBeanServerConnection;
34 import javax.management.ObjectName;
35 import javax.management.openmbean.OpenType;
36 import javax.management.openmbean.CompositeData;
37 import javax.management.openmbean.InvalidKeyException;
39 import org.collectd.api.Collectd;
40 import org.collectd.api.DataSet;
41 import org.collectd.api.DataSource;
42 import org.collectd.api.ValueList;
43 import org.collectd.api.PluginData;
44 import org.collectd.api.OConfigValue;
45 import org.collectd.api.OConfigItem;
47 /**
48 * Representation of a <value /> block and query functionality.
49 *
50 * This class represents a <value /> block in the configuration. As
51 * such, the constructor takes an {@link org.collectd.api.OConfigValue} to
52 * construct an object of this class.
53 *
54 * The object can then be asked to query data from JMX and dispatch it to
55 * collectd.
56 *
57 * @see GenericJMXConfMBean
58 */
59 class GenericJMXConfValue
60 {
61 private String _ds_name;
62 private DataSet _ds;
63 private List<String> _attributes;
64 private String _instance_prefix;
65 private List<String> _instance_from;
66 private boolean _is_table;
68 /**
69 * Converts a generic (OpenType) object to a number.
70 *
71 * Returns null if a conversion is not possible or not implemented.
72 */
73 private Number genericObjectToNumber (Object obj, int ds_type) /* {{{ */
74 {
75 if (obj instanceof String)
76 {
77 String str = (String) obj;
79 try
80 {
81 if (ds_type == DataSource.TYPE_GAUGE)
82 return (new Double (str));
83 else
84 return (new Long (str));
85 }
86 catch (NumberFormatException e)
87 {
88 return (null);
89 }
90 }
91 else if (obj instanceof Byte)
92 {
93 return (new Byte ((Byte) obj));
94 }
95 else if (obj instanceof Short)
96 {
97 return (new Short ((Short) obj));
98 }
99 else if (obj instanceof Integer)
100 {
101 return (new Integer ((Integer) obj));
102 }
103 else if (obj instanceof Long)
104 {
105 return (new Long ((Long) obj));
106 }
107 else if (obj instanceof Float)
108 {
109 return (new Float ((Float) obj));
110 }
111 else if (obj instanceof Double)
112 {
113 return (new Double ((Double) obj));
114 }
115 else if (obj instanceof BigDecimal)
116 {
117 return (BigDecimal.ZERO.add ((BigDecimal) obj));
118 }
119 else if (obj instanceof BigInteger)
120 {
121 return (BigInteger.ZERO.add ((BigInteger) obj));
122 }
124 return (null);
125 } /* }}} Number genericObjectToNumber */
127 /**
128 * Converts a generic list to a list of numbers.
129 *
130 * Returns null if one or more objects could not be converted.
131 */
132 private List<Number> genericListToNumber (List<Object> objects) /* {{{ */
133 {
134 List<Number> ret = new ArrayList<Number> ();
135 List<DataSource> dsrc = this._ds.getDataSources ();
137 assert (objects.size () == dsrc.size ());
139 for (int i = 0; i < objects.size (); i++)
140 {
141 Number n;
143 n = genericObjectToNumber (objects.get (i), dsrc.get (i).getType ());
144 if (n == null)
145 return (null);
146 ret.add (n);
147 }
149 return (ret);
150 } /* }}} List<Number> genericListToNumber */
152 /**
153 * Converts a list of CompositeData to a list of numbers.
154 *
155 * From each <em>CompositeData </em> the key <em>key</em> is received and all
156 * those values are converted to a number. If one of the
157 * <em>CompositeData</em> doesn't have the specified key or one returned
158 * object cannot converted to a number then the function will return null.
159 */
160 private List<Number> genericCompositeToNumber (List<CompositeData> cdlist, /* {{{ */
161 String key)
162 {
163 List<Object> objects = new ArrayList<Object> ();
165 for (int i = 0; i < cdlist.size (); i++)
166 {
167 CompositeData cd;
168 Object value;
170 cd = cdlist.get (i);
171 try
172 {
173 value = cd.get (key);
174 }
175 catch (InvalidKeyException e)
176 {
177 return (null);
178 }
179 objects.add (value);
180 }
182 return (genericListToNumber (objects));
183 } /* }}} List<Number> genericCompositeToNumber */
185 private void submitTable (List<Object> objects, ValueList vl, /* {{{ */
186 String instancePrefix)
187 {
188 List<CompositeData> cdlist;
189 Set<String> keySet = null;
190 Iterator<String> keyIter;
192 cdlist = new ArrayList<CompositeData> ();
193 for (int i = 0; i < objects.size (); i++)
194 {
195 Object obj;
197 obj = objects.get (i);
198 if (obj instanceof CompositeData)
199 {
200 CompositeData cd;
202 cd = (CompositeData) obj;
204 if (i == 0)
205 keySet = cd.getCompositeType ().keySet ();
207 cdlist.add (cd);
208 }
209 else
210 {
211 Collectd.logError ("GenericJMXConfValue: At least one of the "
212 + "attributes was not of type `CompositeData', as required "
213 + "when table is set to `true'.");
214 return;
215 }
216 }
218 assert (keySet != null);
220 keyIter = keySet.iterator ();
221 while (keyIter.hasNext ())
222 {
223 String key;
224 List<Number> values;
226 key = keyIter.next ();
227 values = genericCompositeToNumber (cdlist, key);
228 if (values == null)
229 {
230 Collectd.logError ("GenericJMXConfValue: Cannot build a list of "
231 + "numbers for key " + key + ". Most likely not all attributes "
232 + "have this key.");
233 continue;
234 }
236 if (instancePrefix == null)
237 vl.setTypeInstance (key);
238 else
239 vl.setTypeInstance (instancePrefix + key);
240 vl.setValues (values);
242 Collectd.dispatchValues (vl);
243 }
244 } /* }}} void submitTable */
246 private void submitScalar (List<Object> objects, ValueList vl, /* {{{ */
247 String instancePrefix)
248 {
249 List<Number> values;
251 values = genericListToNumber (objects);
252 if (values == null)
253 {
254 Collectd.logError ("GenericJMXConfValue: Cannot convert list of "
255 + "objects to numbers.");
256 return;
257 }
259 if (instancePrefix == null)
260 vl.setTypeInstance ("");
261 else
262 vl.setTypeInstance (instancePrefix);
263 vl.setValues (values);
265 Collectd.dispatchValues (vl);
266 } /* }}} void submitScalar */
268 private Object queryAttributeRecursive (CompositeData parent, /* {{{ */
269 List<String> attrName)
270 {
271 String key;
272 Object value;
274 key = attrName.remove (0);
276 try
277 {
278 value = parent.get (key);
279 }
280 catch (InvalidKeyException e)
281 {
282 return (null);
283 }
285 if (attrName.size () == 0)
286 {
287 return (value);
288 }
289 else
290 {
291 if (value instanceof CompositeData)
292 return (queryAttributeRecursive ((CompositeData) value, attrName));
293 else
294 return (null);
295 }
296 } /* }}} queryAttributeRecursive */
298 private Object queryAttribute (MBeanServerConnection conn, /* {{{ */
299 ObjectName objName, String attrName)
300 {
301 List<String> attrNameList;
302 String key;
303 Object value;
304 String[] attrNameArray;
306 attrNameList = new ArrayList<String> ();
308 attrNameArray = attrName.split ("\\.");
309 key = attrNameArray[0];
310 for (int i = 1; i < attrNameArray.length; i++)
311 attrNameList.add (attrNameArray[i]);
313 try
314 {
315 try
316 {
317 value = conn.getAttribute (objName, key);
318 }
319 catch (javax.management.AttributeNotFoundException e)
320 {
321 value = conn.invoke (objName, key, /* args = */ null, /* types = */ null);
322 }
323 }
324 catch (Exception e)
325 {
326 Collectd.logError ("GenericJMXConfValue.query: getAttribute failed: "
327 + e);
328 return (null);
329 }
331 if (attrNameList.size () == 0)
332 {
333 return (value);
334 }
335 else
336 {
337 if (value instanceof CompositeData)
338 return (queryAttributeRecursive((CompositeData) value, attrNameList));
339 else if (value instanceof OpenType)
340 {
341 OpenType ot = (OpenType) value;
342 Collectd.logNotice ("GenericJMXConfValue: Handling of OpenType \""
343 + ot.getTypeName () + "\" is not yet implemented.");
344 return (null);
345 }
346 else
347 {
348 Collectd.logError ("GenericJMXConfValue: Received object of "
349 + "unknown class.");
350 return (null);
351 }
352 }
353 } /* }}} Object queryAttribute */
355 private String join (String separator, List<String> list) /* {{{ */
356 {
357 StringBuffer sb;
359 sb = new StringBuffer ();
361 for (int i = 0; i < list.size (); i++)
362 {
363 if (i > 0)
364 sb.append ("-");
365 sb.append (list.get (i));
366 }
368 return (sb.toString ());
369 } /* }}} String join */
371 private String getConfigString (OConfigItem ci) /* {{{ */
372 {
373 List<OConfigValue> values;
374 OConfigValue v;
376 values = ci.getValues ();
377 if (values.size () != 1)
378 {
379 Collectd.logError ("GenericJMXConfValue: The " + ci.getKey ()
380 + " configuration option needs exactly one string argument.");
381 return (null);
382 }
384 v = values.get (0);
385 if (v.getType () != OConfigValue.OCONFIG_TYPE_STRING)
386 {
387 Collectd.logError ("GenericJMXConfValue: The " + ci.getKey ()
388 + " configuration option needs exactly one string argument.");
389 return (null);
390 }
392 return (v.getString ());
393 } /* }}} String getConfigString */
395 private Boolean getConfigBoolean (OConfigItem ci) /* {{{ */
396 {
397 List<OConfigValue> values;
398 OConfigValue v;
399 Boolean b;
401 values = ci.getValues ();
402 if (values.size () != 1)
403 {
404 Collectd.logError ("GenericJMXConfValue: The " + ci.getKey ()
405 + " configuration option needs exactly one boolean argument.");
406 return (null);
407 }
409 v = values.get (0);
410 if (v.getType () != OConfigValue.OCONFIG_TYPE_BOOLEAN)
411 {
412 Collectd.logError ("GenericJMXConfValue: The " + ci.getKey ()
413 + " configuration option needs exactly one boolean argument.");
414 return (null);
415 }
417 return (new Boolean (v.getBoolean ()));
418 } /* }}} String getConfigBoolean */
420 /**
421 * Constructs a new value with the configured properties.
422 */
423 public GenericJMXConfValue (OConfigItem ci) /* {{{ */
424 throws IllegalArgumentException
425 {
426 List<OConfigItem> children;
427 Iterator<OConfigItem> iter;
429 this._ds_name = null;
430 this._ds = null;
431 this._attributes = new ArrayList<String> ();
432 this._instance_prefix = null;
433 this._instance_from = new ArrayList<String> ();
434 this._is_table = false;
436 /*
437 * <Value>
438 * Type "memory"
439 * Table true|false
440 * Attribute "HeapMemoryUsage"
441 * Attribute "..."
442 * :
443 * # Type instance:
444 * InstancePrefix "heap-"
445 * </Value>
446 */
447 children = ci.getChildren ();
448 iter = children.iterator ();
449 while (iter.hasNext ())
450 {
451 OConfigItem child = iter.next ();
453 if (child.getKey ().equalsIgnoreCase ("Type"))
454 {
455 String tmp = getConfigString (child);
456 if (tmp != null)
457 this._ds_name = tmp;
458 }
459 else if (child.getKey ().equalsIgnoreCase ("Table"))
460 {
461 Boolean tmp = getConfigBoolean (child);
462 if (tmp != null)
463 this._is_table = tmp.booleanValue ();
464 }
465 else if (child.getKey ().equalsIgnoreCase ("Attribute"))
466 {
467 String tmp = getConfigString (child);
468 if (tmp != null)
469 this._attributes.add (tmp);
470 }
471 else if (child.getKey ().equalsIgnoreCase ("InstancePrefix"))
472 {
473 String tmp = getConfigString (child);
474 if (tmp != null)
475 this._instance_prefix = tmp;
476 }
477 else if (child.getKey ().equalsIgnoreCase ("InstanceFrom"))
478 {
479 String tmp = getConfigString (child);
480 if (tmp != null)
481 this._instance_from.add (tmp);
482 }
483 else
484 throw (new IllegalArgumentException ("Unknown option: "
485 + child.getKey ()));
486 }
488 if (this._ds_name == null)
489 throw (new IllegalArgumentException ("No data set was defined."));
490 else if (this._attributes.size () == 0)
491 throw (new IllegalArgumentException ("No attribute was defined."));
492 } /* }}} GenericJMXConfValue (OConfigItem ci) */
494 /**
495 * Query values via JMX according to the object's configuration and dispatch
496 * them to collectd.
497 *
498 * @param conn Connection to the MBeanServer.
499 * @param objName Object name of the MBean to query.
500 * @param pd Preset naming components. The members host, plugin and
501 * plugin instance will be used.
502 */
503 public void query (MBeanServerConnection conn, ObjectName objName, /* {{{ */
504 PluginData pd)
505 {
506 ValueList vl;
507 List<DataSource> dsrc;
508 List<Object> values;
509 List<String> instanceList;
510 String instancePrefix;
512 if (this._ds == null)
513 {
514 this._ds = Collectd.getDS (this._ds_name);
515 if (this._ds == null)
516 {
517 Collectd.logError ("GenericJMXConfValue: Unknown type: "
518 + this._ds_name);
519 return;
520 }
521 }
523 dsrc = this._ds.getDataSources ();
524 if (dsrc.size () != this._attributes.size ())
525 {
526 Collectd.logError ("GenericJMXConfValue.query: The data set "
527 + this._ds_name + " has " + this._ds.getDataSources ().size ()
528 + " data sources, but there were " + this._attributes.size ()
529 + " attributes configured. This doesn't match!");
530 this._ds = null;
531 return;
532 }
534 vl = new ValueList (pd);
535 vl.setType (this._ds_name);
537 /*
538 * Build the instnace prefix from the fixed string prefix and the
539 * properties of the objName.
540 */
541 instanceList = new ArrayList<String> ();
542 for (int i = 0; i < this._instance_from.size (); i++)
543 {
544 String propertyName;
545 String propertyValue;
547 propertyName = this._instance_from.get (i);
548 propertyValue = objName.getKeyProperty (propertyName);
549 if (propertyValue == null)
550 {
551 Collectd.logError ("GenericJMXConfMBean: "
552 + "No such property in object name: " + propertyName);
553 }
554 else
555 {
556 instanceList.add (propertyValue);
557 }
558 }
560 if (this._instance_prefix != null)
561 instancePrefix = new String (this._instance_prefix
562 + join ("-", instanceList));
563 else
564 instancePrefix = join ("-", instanceList);
566 /*
567 * Build a list of `Object's which is then passed to `submitTable' and
568 * `submitScalar'.
569 */
570 values = new ArrayList<Object> ();
571 assert (dsrc.size () == this._attributes.size ());
572 for (int i = 0; i < this._attributes.size (); i++)
573 {
574 Object v;
576 v = queryAttribute (conn, objName, this._attributes.get (i));
577 if (v == null)
578 {
579 Collectd.logError ("GenericJMXConfValue.query: "
580 + "Querying attribute " + this._attributes.get (i) + " failed.");
581 return;
582 }
584 values.add (v);
585 }
587 if (this._is_table)
588 submitTable (values, vl, instancePrefix);
589 else
590 submitScalar (values, vl, instancePrefix);
591 } /* }}} void query */
592 } /* class GenericJMXConfValue */
594 /* vim: set sw=2 sts=2 et fdm=marker : */