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15 <a href="../index.html" class="el_report">JaCoCo</a> &gt;
16 <a href="index.html" class="el_group">Documentation</a> &gt;
17 <span class="el_source">Ant Tasks</span>
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19<div id="content">
20
21<h1>Ant Tasks</h1>
22
23<p>
24 JaCoCo comes with Ant tasks to launch Java programs with execution recording
25 and for creating coverage reports from the recorded data. Execution data can
26 be collected and managed with the tasks
27 <a href="#coverage"><code>coverage</code></a>,
28 <a href="#agent"><code>agent</code></a>,
29 <a href="#dump"><code>dump</code></a> and
30 <a href="#merge"><code>merge</code></a>. Reports in different formats are
Marc R. Hoffmann235a09e2012-12-23 15:57:16 +010031 creates with the <a href="#report"><code>report</code></a> task. For
32 <a href="offline.html">offline instrumentation</a> the task
33 <a href="#instrument"><code>instrument</code></a> can be used to prepare class
34 files.
Evgeny Mandrikov82a92ca2012-01-15 20:25:48 +000035</p>
36
37<p class="hint">
38 If you want to have line number information included in the coverage reports
39 or you want source code highlighting the class files of the test target must
40 be compiled with debug information.
41</p>
42
43<h2>Example</h2>
44
45<p>
46 The JaCoCo distribution contains a simple example how code coverage can be
47 added to a Ant based build. The
Marc R. Hoffmanna3aa78b2012-05-02 18:56:47 +000048 <a href="examples/build/build.xml">build script</a> compiles Java sources,
Marc R. Hoffmann78309272012-05-02 19:25:44 +000049 runs an simple Java programm and creates a coverage report. The complete
50 example is located in the <code>./doc/examples/build</code> folder of the
51 distribution.
Evgeny Mandrikov82a92ca2012-01-15 20:25:48 +000052</p>
53
54
55<h2>Prerequisites</h2>
56
57<p>
58 The JaCoCo Ant tasks require
59</p>
60
61<ul>
62 <li>Ant 1.7.0 or higher and</li>
63 <li>Java 1.5 or higher (for both, the Ant runner and the test executor).</li>
64</ul>
65
66
67<p>All tasks are defined in <code>jacocoant.jar</code> (which is part of the
68 distribution) and can be included in your Ant scripts with the usual
69 <code>taskdef</code> declaration:
70</p>
71
72<pre class="source lang-xml linenums">
73&lt;project name="Example" xmlns:jacoco="antlib:org.jacoco.ant"&gt;
74
75 &lt;taskdef uri="antlib:org.jacoco.ant" resource="org/jacoco/ant/antlib.xml"&gt;
76 &lt;classpath path="<i>path_to_jacoco</i>/lib/jacocoant.jar"/&gt;
77 &lt;/taskdef&gt;
78
79 ...
80
81&lt;/project&gt;
82</pre>
83
84<p>
85 Alternatively you might also place the <code>jacocoant.jar</code> in your
86 Ant <code><i>ANT_HOME</i>/lib</code> folder. If you use the name space URI
87 <code>antlib:org.jacoco.ant</code> for JaCoCo tasks Ant will find them
88 automatically without the <code>taskdef</code> declaration above.
89</p>
90
91<p class="hint">
92 Declaring a XML namespace for JaCoCo tasks is optional but always recommended
93 if you mix tasks from different libraries. All subsequent examples use the
94 <code>jacoco</code> prefix declared above. If you don't declare a separate
95 namespace the <code>jacoco</code> prefix must be removed from the following
96 examples.
97</p>
98
99<h2><a name="coverage">Task <code>coverage</code></a></h2>
100
101<p>
102 The standard Ant tasks to launch Java programs are <code>java</code>, <code>junit</code> and
103 <code>testng</code>. To add code coverage recording to these tasks they can
104 simply be wrapped with the <code>coverage</code> task as shown in the
105 following examples:
106</p>
107
108<pre class="source lang-xml linenums">
109&lt;jacoco:coverage>
110 &lt;java classname="org.jacoco.examples.HelloJaCoCo" fork="true"&gt;
111 &lt;classpath&gt;
112 &lt;pathelement location="./bin"/&gt;
113 &lt;/classpath&gt;
114 &lt;/java&gt;
115&lt;/jacoco:coverage&gt;
116
117
118&lt;jacoco:coverage>
119 &lt;junit fork="true" forkmode="once"&gt;
120 &lt;test name="org.jacoco.examples.HelloJaCoCoTest"/&gt;
121 &lt;classpath&gt;
122 &lt;pathelement location="./bin"/&gt;
123 &lt;/classpath&gt;
124 &lt;/junit&gt;
125&lt;/jacoco:coverage&gt;
126</pre>
127
128<p>
129 Resulting coverage information is collected during execution and written
130 to a file when the process terminates. Note the <code>fork</code> attribute
131 above in the wrapped <code>java</code> task.
132</p>
133
134<p class="hint">
135 The nested task always has to declare <code>fork="true"</code>, otherwise the
136 <code>coverage</code> task can't record coverage information and will fail.
137 In addition the <code>junit</code> task should declare
138 <code>forkmode="once"</code> to avoid starting a new JVM for every single test
139 case and decreasing execution performance dramatically (unless this is
140 required by the nature of the test cases).
141</p>
142
143<p>
144 The coverage task must wrap exactly one task. While it typically works without
145 any configuration, the behavior can be adjusted with some optional attributes:
146</p>
147
148<table class="coverage">
149 <thead>
150 <tr>
151 <td>Attribute</td>
152 <td>Description</td>
153 <td>Default</td>
154 </tr>
155 </thead>
156 <tbody>
157 <tr>
158 <td><code>enabled</code></td>
159 <td>If set to <code>true</code> coverage data will be collected for the contained task.</td>
160 <td><code>true</code></td>
161 </tr>
162 <tr>
163 <td><code>destfile</code></td>
164 <td>Path to the output file for execution data.</td>
165 <td><code>jacoco.exec</code></td>
166 </tr>
167 <tr>
168 <td><code>append</code></td>
169 <td>If set to <code>true</code> and the execution data file already
170 exists, coverage data is appended to the existing file. If set to
171 <code>false</code>, an existing execution data file will be replaced.
172 </td>
173 <td><code>true</code></td>
174 </tr>
175 <tr>
176 <td><code>includes</code></td>
177 <td>A list of class names that should be included in execution analysis.
178 The list entries are separated by a colon (<code>:</code>) and
179 may use wildcard characters (<code>*</code> and <code>?</code>).
180 Except for performance optimization or technical corner cases this
181 option is normally not required.
182 </td>
183 <td><code>*</code> (all classes)</td>
184 </tr>
185 <tr>
186 <td><code>excludes</code></td>
187 <td>A list of class names that should be excluded from execution analysis.
188 The list entries are separated by a colon (<code>:</code>) and
189 may use wildcard characters (<code>*</code> and <code>?</code>).
190 Except for performance optimization or technical corner cases this
191 option is normally not required.
192 </td>
193 <td><i>empty</i> (no excluded classes)</td>
194 </tr>
195 <tr>
196 <td><code>exclclassloader</code></td>
197 <td>A list of class loader names, that should be excluded from execution
198 analysis. The list entries are separated by a colon
199 (<code>:</code>) and may use wildcard characters (<code>*</code> and
200 <code>?</code>). This option might be required in case of special
201 frameworks that conflict with JaCoCo code instrumentation, in
202 particular class loaders that do not have access to the Java runtime
203 classes.
204 </td>
205 <td><code>sun.reflect.DelegatingClassLoader</code></td>
206 </tr>
207 <tr>
208 <td><code>sessionid</code></td>
209 <td>A session identifier that is written with the execution data. Without
210 this parameter a random identifier is created by the agent.
211 </td>
212 <td><i>auto-generated</i></td>
213 </tr>
214 <tr>
215 <td><code>dumponexit</code></td>
216 <td>If set to <code>true</code> coverage data will be written on VM
217 shutdown.
218 </td>
219 <td><code>true</code></td>
220 </tr>
221 <tr>
222 <td><code>output</code></td>
223 <td>Output method to use for writing coverage data. Valid options are:
224 <ul>
225 <li><code>file</code>: At VM termination execution data is written to
226 the file specified in the <code>destfile</code> attribute.</li>
227 <li><code>tcpserver</code>: The agent listens for incoming connections
228 on the TCP port specified by the <code>address</code> and
229 <code>port</code> attribute. Execution data is written to this
230 TCP connection.</li>
231 <li><code>tcpclient</code>: At startup the agent connects to the TCP
232 port specified by the <code>address</code> and <code>port</code>
233 attribute. Execution data is written to this TCP connection.</li>
234 <li><code>mbean</code>: The agent registers an JMX MBean under the
235 name <code>org.jacoco:type=Runtime</code>.</li>
236 </ul>
237 </td>
238 <td><code>file</code></td>
239 </tr>
240 <tr>
241 <td><code>address</code></td>
242 <td>IP address or hostname to bind to when the output method is
243 <code>tcpserver</code> or connect to when the output method is
244 <code>tcpclient</code>. In <code>tcpserver</code> mode the value
245 "<code>*</code>" causes the agent to accept connections on any local
246 address.
247 </td>
248 <td><i>loopback interface</i></td>
249 </tr>
250 <tr>
251 <td><code>port</code></td>
252 <td>Port to bind to when the output method is <code>tcpserver</code> or
253 connect to when the output method is <code>tcpclient</code>. In
254 <code>tcpserver</code> mode the port must be available, which means
255 that if multiple JaCoCo agents should run on the same machine,
256 different ports have to be specified.
257 </td>
258 <td><code>6300</code></td>
259 </tr>
Marc R. Hoffmanncf41fc12012-06-30 00:15:43 +0000260 <tr>
261 <td><code>classdumpdir</code></td>
262 <td>Location relative to the working directory where all class files seen
263 by the agent are dumped to. This can be useful for debugging purposes
264 or in case of dynamically created classes for example when scripting
265 engines are used.
266 </td>
267 <td><i>no dumps</i></td>
268 </tr>
Evgeny Mandrikov82a92ca2012-01-15 20:25:48 +0000269 </tbody>
270</table>
271
272
273<h2><a name="agent">Task <code>agent</code></a></h2>
274
275<p>
276 If the <code>coverage</code> task is not suitable for your launch target, you
277 might alternatively use the <code>agent</code> task to create the
278 <a href="agent.html">Java agent</a> parameter. The following example defines a
279 Ant property with the name <code>agentvmparam</code> that can be directly used
280 as a Java VM parameter:
281</p>
282
283<pre class="source lang-xml linenums">
284&lt;jacoco:agent property="agentvmparam"/&gt;
285</pre>
286
287<p>
288 This task has the same attributes as the <code>coverage</code> task plus an
289 additional property to specify the target property name:
290</p>
291
292<table class="coverage">
293 <thead>
294 <tr>
295 <td>Attribute</td>
296 <td>Description</td>
297 <td>Default</td>
298 </tr>
299 </thead>
300 <tbody>
301 <tr>
302 <td><code>enabled</code></td>
303 <td>When this variable is set to <code>false</code> the value of <code>property</code> will be set to an empty string, effectively
304 disabling coverage instrumentation for any tasks that used the value.</td>
305 <td><code>true</code></td>
306 </tr>
307 <tr>
308 <td><code>property</code></td>
309 <td>Name of the Ant property to set.</td>
310 <td><i>none (required)</i></td>
311 </tr>
312 <tr>
313 <td colspan="3"><i>All attributes of the <code>coverage</code> task.</i></td>
314 </tr>
315 </tbody>
316</table>
317
318
319<h2><a name="dump">Task <code>dump</code></a></h2>
320
321<p>
322 This task allows to remotely collect execution data from another JVM without
323 stopping it. For example:
324</p>
325
326<pre class="source lang-xml linenums">
327&lt;jacoco:dump address="server.example.com" reset="true" destfile="remote.exec"/&gt;
328</pre>
329
330<p>
331 Remote dumps are usefull for long running Java processes like application
332 servers.
333</p>
334
335<p class="hint">
336 The target JVM needs to have a <a href="agent.html">JaCoCo agent</a>
337 configured with <code>output</code> mode <code>tcpserver</code>. See
338 <a href="#coverage"><code>coverage</code></a> and
339 <a href="#agent"><code>agent</code></a> tasks above.
340</p>
341
342<p>
343 The <code>dump</code> task has the following attributes:
344</p>
345
346<table class="coverage">
347 <thead>
348 <tr>
349 <td>Attribute</td>
350 <td>Description</td>
351 <td>Default</td>
352 </tr>
353 </thead>
354 <tbody>
355 <tr>
356 <td><code>address</code></td>
357 <td>Target IP address or DNS name.</td>
358 <td><code>localhost</code></td>
359 </tr>
360 <tr>
361 <td><code>port</code></td>
362 <td>Target TCP port.</td>
363 <td><code>6300</code></td>
364 </tr>
365 <tr>
366 <td><code>dump</code></td>
367 <td>Flag whether execution data should be dumped.</td>
368 <td><code>true</code></td>
369 </tr>
370 <tr>
371 <td><code>reset</code></td>
372 <td>Flag whether execution data should be reset in the target agent after
373 the dump.</td>
374 <td><code>false</code></td>
375 </tr>
376 <tr>
377 <td><code>destfile</code></td>
378 <td>File location to write the collected execution data to.</td>
379 <td><i>none (required if dump=true)</i></td>
380 </tr>
381 <tr>
382 <td><code>append</code></td>
383 <td>If set to <code>true</code> and the execution data file already
384 exists, coverage data is appended to the existing file. If set to
385 <code>false</code>, an existing execution data file will be replaced.
386 </td>
387 <td><code>true</code></td>
388 </tr>
389 </tbody>
390</table>
391
392
393<h2><a name="merge">Task <code>merge</code></a></h2>
394
395<p>
396 This task can be used to merge the execution data from multiple test runs
397 into a single data store.
398</p>
399
400<pre class="source lang-xml linenums">
401&lt;jacoco:merge destfile="merged.exec"&gt;
402 &lt;fileset dir="executionData" includes="*.exec"/&gt;
403&lt;/jacoco:merge&gt;
404</pre>
405
406<p>
407 The task definition can contain any number of resource collection types and
408 has the following mandatory attribute:
409</p>
410
411<table class="coverage">
412 <thead>
413 <tr>
414 <td>Attribute</td>
415 <td>Description</td>
416 <td>Default</td>
417 </tr>
418 </thead>
419 <tbody>
420 <tr>
421 <td><code>destfile</code></td>
422 <td>File location to write the merged execution data to.</td>
423 <td><i>none (required)</i></td>
424 </tr>
425 </tbody>
426</table>
427
428
429<h2><a name="report">Task <code>report</code></a></h2>
430
431<p>
432 Finally different reports can be created with the <code>report</code> task.
433 A report task declaration consists of different sections, two specify the
434 input data, additional ones specify the output formats:
435</p>
436
437<pre class="source lang-xml linenums">
438&lt;jacoco:report&gt;
439
440 &lt;executiondata&gt;
441 &lt;file file="jacoco.exec"/&gt;
442 &lt;/executiondata&gt;
443
444 &lt;structure name="Example Project"&gt;
445 &lt;classfiles&gt;
446 &lt;fileset dir="classes"/&gt;
447 &lt;/classfiles&gt;
448 &lt;sourcefiles encoding="UTF-8"&gt;
449 &lt;fileset dir="src"/&gt;
450 &lt;/sourcefiles&gt;
451 &lt;/structure&gt;
452
453 &lt;html destdir="report"/&gt;
454
455&lt;/jacoco:report&gt;
456</pre>
457
458<p>
459 As you can see from the example above the <code>report</code> task is based
460 on several nested elements:
461</p>
462
463<h3>Element <code>executiondata</code></h3>
464
465<p>
466 Within this element Ant resources and resource collections can be specified,
467 that represent JaCoCo execution data files. If more than one execution data
468 file is specified, execution data is combined. A particular piece of code is
469 considered executed when it is marked as such in any of the input files.
470</p>
471
472<h3>Element <code>structure</code></h3>
473
474<p>
475 This element defines the report structure. It might contain the following
476 nested elements:
477</p>
478
479<ul>
480 <li><code>classfiles</code>: Container element for Ant resources and resource
481 collections that can specify Java class files, ZIP archive files (jar, war,
482 ear etc.) or folders containing class files. Archives and folders are
483 searched recursively for class files.</li>
484 <li><code>sourcefiles</code>: Optional container element for Ant resources and
485 resource collections that specify corresponding source files. If source
Marc R. Hoffmann8b5d6a32012-01-18 20:24:45 +0000486 files are specified, some report formats include highlighted source code.
487 Source files can be specified as individual files or as source directories.</li>
Evgeny Mandrikov82a92ca2012-01-15 20:25:48 +0000488</ul>
489
490<p>
491 The <code>sourcefiles</code> element has these optional attributes:
492</p>
493
494<table class="coverage">
495 <thead>
496 <tr>
497 <td>Attribute</td>
498 <td>Description</td>
499 <td>Default</td>
500 </tr>
501 </thead>
502 <tbody>
503 <tr>
504 <td><code>encoding</code></td>
505 <td>Character encoding of the source files.</td>
506 <td>Platform default encoding</td>
507 </tr>
508 <tr>
509 <td><code>tabwidth</code></td>
510 <td>Number of whitespace characters that represent a tab character.</td>
511 <td>4 characters</td>
512 </tr>
513 </tbody>
514</table>
515
Marc R. Hoffmann8b5d6a32012-01-18 20:24:45 +0000516<p class="hint">
517 <b>Important:</b> Source file resources must always be specified relative to
518 the respective source folder. If directory resources are given, they must
519 directly point to source folders. Otherwise source lookup will not succeed.
520</p>
521
Evgeny Mandrikov82a92ca2012-01-15 20:25:48 +0000522<p>
523 Note that the <code>classfiles</code> and <code>sourcefiles</code> elements
524 accept any
525 <a href="http://ant.apache.org/manual/Types/resources.html#collection">Ant
526 resource collection</a>. Therefore also filtering the class file set is
527 possible and allows to narrow the scope of the report, for example:
528</p>
529
530<pre class="source lang-xml linenums">
531&lt;classfiles&gt;
532 &lt;fileset dir="classes"&gt;
533 &lt;include name="org/jacoco/examples/important/**/*.class"/&gt;
534 &lt;/fileset&gt;
535&lt;/classfiles&gt;
536</pre>
537
538<p class="hint">
539 <b>Performance Warning:</b> Although it is technically possible and sometimes
540 convenient to use Ant's <code>zipfileset</code> to specify class or source
541 files, this resource type has poor performance characteristics and comes with
542 an huge memory overhead especially for large scale projects.
543</p>
544
545<p>
546 The structure can be refined with a hierarchy of <code>group</code> elements.
547 This way the coverage report can reflect different modules of a software
548 project. For each group element the corresponding class and source files can
549 be specified separately. For example:
550</p>
551
552<pre class="source lang-xml linenums">
553&lt;structure name="Example Project"&gt;
554 &lt;group name="Server"&gt;
555 &lt;classfiles&gt;
556 &lt;fileset dir="${workspace.dir}/org.jacoco.example.server/classes"/&gt;
557 &lt;/classfiles&gt;
558 &lt;sourcefiles&gt;
559 &lt;fileset dir="${workspace.dir}/org.jacoco.example.server/src"/&gt;
560 &lt;/sourcefiles&gt;
561 &lt;/group&gt;
562 &lt;group name="Client"&gt;
563 &lt;classfiles&gt;
564 &lt;fileset dir="${workspace.dir}/org.jacoco.example.client/classes"/&gt;
565 &lt;/classfiles&gt;
566 &lt;sourcefiles&gt;
567 &lt;fileset dir="${workspace.dir}/org.jacoco.example.client/src"/&gt;
568 &lt;/sourcefiles&gt;
569 &lt;/group&gt;
570
571 ...
572
573&lt;/structure&gt;
574</pre>
575
576<p>
577 Both <code>structure</code> and <code>group</code> elements have the following
578 mandatory attribute:
579</p>
580
581<table class="coverage">
582 <thead>
583 <tr>
584 <td>Attribute</td>
585 <td>Description</td>
586 <td>Default</td>
587 </tr>
588 </thead>
589 <tbody>
590 <tr>
591 <td><code>name</code></td>
592 <td>Name of the structure or group.</td>
593 <td><i>none (required)</i></td>
594 </tr>
595 </tbody>
596</table>
597
598<h3>Element <code>html</code></h3>
599
600<p>
601 Create a multi-page report in HTML format. The report can either be written as
602 multiple files into a directory or compressed into a single ZIP file.
603</p>
604
605<table class="coverage">
606 <thead>
607 <tr>
608 <td>Attribute</td>
609 <td>Description</td>
610 <td>Default</td>
611 </tr>
612 </thead>
613 <tbody>
614 <tr>
615 <td><code>destdir</code></td>
616 <td>Directory to create the report in. Either this property or
617 <code>destfile</code> has to be supplied.</td>
618 <td><i>none (required)</i></td>
619 </tr>
620 <tr>
621 <td><code>destfile</code></td>
622 <td>Zip file to create the report in. Either this property or
623 <code>destdir</code> has to be supplied.</td>
624 <td><i>none (required)</i></td>
625 </tr>
626 <tr>
627 <td><code>footer</code></td>
628 <td>Footer text for each report page.</td>
629 <td><i>no footer</i></td>
630 </tr>
631 <tr>
632 <td><code>encoding</code></td>
633 <td>Character encoding of generated HTML pages.</td>
634 <td><code>UTF-8</code></td>
635 </tr>
636 <tr>
637 <td><code>locale</code></td>
638 <td>Locale specified as ISO code (en, fr, jp, ...) used for number formating.</td>
639 <td><i>platform locale</i></td>
640 </tr>
641 </tbody>
642</table>
643
644<h3>Element <code>xml</code></h3>
645
646<p>
647 Create a single-file report in XML format.
648</p>
649
650<table class="coverage">
651 <thead>
652 <tr>
653 <td>Attribute</td>
654 <td>Description</td>
655 <td>Default</td>
656 </tr>
657 </thead>
658 <tbody>
659 <tr>
660 <td><code>destfile</code></td>
661 <td>Location to write the report file to.</td>
662 <td><i>none (required)</i></td>
663 </tr>
664 <tr>
665 <td><code>encoding</code></td>
666 <td>Encoding of the generated XML document.</td>
667 <td><code>UTF-8</code></td>
668 </tr>
669 </tbody>
670</table>
671
672<h3>Element <code>csv</code></h3>
673
674<p>
675 Create single-file report in CSV format.
676</p>
677
678<table class="coverage">
679 <thead>
680 <tr>
681 <td>Attribute</td>
682 <td>Description</td>
683 <td>Default</td>
684 </tr>
685 </thead>
686 <tbody>
687 <tr>
688 <td><code>destfile</code></td>
689 <td>Location to write the report file to.</td>
690 <td><i>none (required)</i></td>
691 </tr>
692 <tr>
693 <td><code>encoding</code></td>
694 <td>Encoding of the generated CSV document.</td>
695 <td><code>UTF-8</code></td>
696 </tr>
697 </tbody>
698</table>
699
Marc R. Hoffmann235a09e2012-12-23 15:57:16 +0100700
701<h2><a name="instrument">Task <code>instrument</code></a></h2>
702
703<p>
704 This task is used for <a href="offline.html">offline instrumentation</a> of
705 class files. The task takes a set of class files and writes instrumented
706 versions to a specified location.
707</p>
708
709<pre class="source lang-xml linenums">
710&lt;jacoco:instrument destfile="target/classes-instr"&gt;
711 &lt;fileset dir="target/classes" includes="**/*.class"/&gt;
712&lt;/jacoco:instrument&gt;
713</pre>
714
715<p>
716 The task definition can contain any number of resource collection types and
717 has the following mandatory attribute:
718</p>
719
720<table class="coverage">
721 <thead>
722 <tr>
723 <td>Attribute</td>
724 <td>Description</td>
725 <td>Default</td>
726 </tr>
727 </thead>
728 <tbody>
729 <tr>
730 <td><code>destdir</code></td>
731 <td>Directory location to write the instrumented class files to.</td>
732 <td><i>none (required)</i></td>
733 </tr>
734 </tbody>
735</table>
736
Evgeny Mandrikov82a92ca2012-01-15 20:25:48 +0000737</div>
738<div class="footer">
739 <span class="right"><a href="@jacoco.home.url@">JaCoCo</a> @qualified.bundle.version@</span>
740 <a href="license.html">Copyright</a> &copy; @copyright.years@ Mountainminds GmbH &amp; Co. KG and Contributors
741</div>
742
743</body>
744</html>