Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
BaseServiceBroker |
|
| 3.375;3,375 |
1 | package org.apache.turbine.services; | |
2 | ||
3 | /* | |
4 | * Licensed to the Apache Software Foundation (ASF) under one | |
5 | * or more contributor license agreements. See the NOTICE file | |
6 | * distributed with this work for additional information | |
7 | * regarding copyright ownership. The ASF licenses this file | |
8 | * to you under the Apache License, Version 2.0 (the | |
9 | * "License"); you may not use this file except in compliance | |
10 | * with the License. You may obtain a copy of the License at | |
11 | * | |
12 | * http://www.apache.org/licenses/LICENSE-2.0 | |
13 | * | |
14 | * Unless required by applicable law or agreed to in writing, | |
15 | * software distributed under the License is distributed on an | |
16 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
17 | * KIND, either express or implied. See the License for the | |
18 | * specific language governing permissions and limitations | |
19 | * under the License. | |
20 | */ | |
21 | ||
22 | ||
23 | import java.util.ArrayList; | |
24 | import java.util.Enumeration; | |
25 | import java.util.Hashtable; | |
26 | import java.util.Iterator; | |
27 | ||
28 | import org.apache.commons.configuration.BaseConfiguration; | |
29 | import org.apache.commons.configuration.Configuration; | |
30 | import org.apache.commons.lang.StringUtils; | |
31 | import org.apache.commons.logging.Log; | |
32 | import org.apache.commons.logging.LogFactory; | |
33 | ||
34 | /** | |
35 | * A generic implementation of a <code>ServiceBroker</code> which | |
36 | * provides: | |
37 | * | |
38 | * <ul> | |
39 | * <li>Maintaining service name to class name mapping, allowing | |
40 | * plugable service implementations.</li> | |
41 | * <li>Providing <code>Services</code> with a configuration based on | |
42 | * system wide configuration mechanism.</li> | |
43 | * </ul> | |
44 | * <li>Integration of TurbineServiceProviders for looking up | |
45 | * non-local services | |
46 | * </ul> | |
47 | * | |
48 | * @author <a href="mailto:burton@apache.org">Kevin Burton</a> | |
49 | * @author <a href="mailto:krzewski@e-point.pl">Rafal Krzewski</a> | |
50 | * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a> | |
51 | * @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a> | |
52 | * @author <a href="mailto:mpoeschl@marmot.at">Martin Poeschl</a> | |
53 | * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> | |
54 | * @version $Id: BaseServiceBroker.java 1066945 2011-02-03 20:27:59Z ludwig $ | |
55 | */ | |
56 | public abstract class BaseServiceBroker implements ServiceBroker | |
57 | { | |
58 | /** | |
59 | * Mapping of Service names to class names. | |
60 | */ | |
61 | 62 | private Configuration mapping = new BaseConfiguration(); |
62 | ||
63 | /** | |
64 | * A repository of Service instances. | |
65 | */ | |
66 | 62 | private Hashtable<String, Service> services = new Hashtable<String, Service>(); |
67 | ||
68 | /** | |
69 | * Configuration for the services broker. | |
70 | * The configuration should be set by the application | |
71 | * in which the services framework is running. | |
72 | */ | |
73 | private Configuration configuration; | |
74 | ||
75 | /** | |
76 | * A prefix for <code>Service</code> properties in | |
77 | * TurbineResource.properties. | |
78 | */ | |
79 | public static final String SERVICE_PREFIX = "services."; | |
80 | ||
81 | /** | |
82 | * A <code>Service</code> property determining its implementing | |
83 | * class name . | |
84 | */ | |
85 | public static final String CLASSNAME_SUFFIX = ".classname"; | |
86 | ||
87 | /** | |
88 | * These are objects that the parent application | |
89 | * can provide so that application specific | |
90 | * services have a mechanism to retrieve specialized | |
91 | * information. For example, in Turbine there are services | |
92 | * that require the RunData object: these services can | |
93 | * retrieve the RunData object that Turbine has placed | |
94 | * in the service manager. This alleviates us of | |
95 | * the requirement of having init(Object) all | |
96 | * together. | |
97 | */ | |
98 | 62 | private Hashtable<String, Object> serviceObjects = new Hashtable<String, Object>(); |
99 | ||
100 | /** Logging */ | |
101 | 62 | private static Log log = LogFactory.getLog(BaseServiceBroker.class); |
102 | ||
103 | /** | |
104 | * Application root path as set by the | |
105 | * parent application. | |
106 | */ | |
107 | private String applicationRoot; | |
108 | ||
109 | /** | |
110 | * mapping from service names to instances of TurbineServiceProviders | |
111 | */ | |
112 | 62 | private Hashtable<String, Service> serviceProviderInstanceMap = new Hashtable<String, Service>(); |
113 | ||
114 | /** | |
115 | * Default constructor, protected as to only be useable by subclasses. | |
116 | * | |
117 | * This constructor does nothing. | |
118 | */ | |
119 | protected BaseServiceBroker() | |
120 | 62 | { |
121 | // nothing to do | |
122 | 62 | } |
123 | ||
124 | /** | |
125 | * Set the configuration object for the services broker. | |
126 | * This is the configuration that contains information | |
127 | * about all services in the care of this service | |
128 | * manager. | |
129 | * | |
130 | * @param configuration Broker configuration. | |
131 | */ | |
132 | public void setConfiguration(Configuration configuration) | |
133 | { | |
134 | 104 | this.configuration = configuration; |
135 | 104 | } |
136 | ||
137 | /** | |
138 | * Get the configuration for this service manager. | |
139 | * | |
140 | * @return Broker configuration. | |
141 | */ | |
142 | public Configuration getConfiguration() | |
143 | { | |
144 | 0 | return configuration; |
145 | } | |
146 | ||
147 | /** | |
148 | * Initialize this service manager. | |
149 | */ | |
150 | public void init() throws InitializationException | |
151 | { | |
152 | // Check: | |
153 | // | |
154 | // 1. The configuration has been set. | |
155 | // 2. Make sure the application root has been set. | |
156 | ||
157 | // FIXME: Make some service framework exceptions to throw in | |
158 | // the event these requirements aren't satisfied. | |
159 | ||
160 | // Create the mapping between service names | |
161 | // and their classes. | |
162 | 104 | initMapping(); |
163 | ||
164 | // Start services that have their 'earlyInit' | |
165 | // property set to 'true'. | |
166 | 104 | initServices(false); |
167 | 104 | } |
168 | ||
169 | /** | |
170 | * Set an application specific service object | |
171 | * that can be used by application specific | |
172 | * services. | |
173 | * | |
174 | * @param name name of service object | |
175 | * @param value value of service object | |
176 | */ | |
177 | public void setServiceObject(String name, Object value) | |
178 | { | |
179 | 0 | serviceObjects.put(name, value); |
180 | 0 | } |
181 | ||
182 | /** | |
183 | * Get an application specific service object. | |
184 | * | |
185 | * @param name the name of the service object | |
186 | * @return Object application specific service object | |
187 | */ | |
188 | public Object getServiceObject(String name) | |
189 | { | |
190 | 0 | return serviceObjects.get(name); |
191 | } | |
192 | ||
193 | /** | |
194 | * Creates a mapping between Service names and class names. | |
195 | * | |
196 | * The mapping is built according to settings present in | |
197 | * TurbineResources.properties. The entries should have the | |
198 | * following form: | |
199 | * | |
200 | * <pre> | |
201 | * services.MyService.classname=com.mycompany.MyServiceImpl | |
202 | * services.MyOtherService.classname=com.mycompany.MyOtherServiceImpl | |
203 | * </pre> | |
204 | * | |
205 | * <br> | |
206 | * | |
207 | * Generic ServiceBroker provides no Services. | |
208 | */ | |
209 | @SuppressWarnings("unchecked") | |
210 | protected void initMapping() | |
211 | { | |
212 | /* | |
213 | * These keys returned in an order that corresponds | |
214 | * to the order the services are listed in | |
215 | * the TR.props. | |
216 | * | |
217 | * When the mapping is created we use a Configuration | |
218 | * object to ensure that the we retain the order | |
219 | * in which the order the keys are returned. | |
220 | * | |
221 | * There's no point in retrieving an ordered set | |
222 | * of keys if they aren't kept in order :-) | |
223 | */ | |
224 | 104 | for (Iterator<String> keys = configuration.getKeys(); keys.hasNext();) |
225 | { | |
226 | 7392 | String key = keys.next(); |
227 | 7392 | String[] keyParts = StringUtils.split(key, "."); |
228 | ||
229 | 7392 | if ((keyParts.length == 3) |
230 | && (keyParts[0] + ".").equals(SERVICE_PREFIX) | |
231 | && ("." + keyParts[2]).equals(CLASSNAME_SUFFIX)) | |
232 | { | |
233 | 774 | String serviceKey = keyParts[1]; |
234 | 774 | log.info("Added Mapping for Service: " + serviceKey); |
235 | ||
236 | 774 | if (!mapping.containsKey(serviceKey)) |
237 | { | |
238 | 480 | mapping.setProperty(serviceKey, |
239 | configuration.getString(key)); | |
240 | } | |
241 | } | |
242 | 7392 | } |
243 | 104 | } |
244 | ||
245 | /** | |
246 | * Determines whether a service is registered in the configured | |
247 | * <code>TurbineResources.properties</code>. | |
248 | * | |
249 | * @param serviceName The name of the service whose existance to check. | |
250 | * @return Registration predicate for the desired services. | |
251 | */ | |
252 | public boolean isRegistered(String serviceName) | |
253 | { | |
254 | 62 | return (services.get(serviceName) != null); |
255 | } | |
256 | ||
257 | /** | |
258 | * Returns an Iterator over all known service names. | |
259 | * | |
260 | * @return An Iterator of service names. | |
261 | */ | |
262 | @SuppressWarnings("unchecked") | |
263 | public Iterator<String> getServiceNames() | |
264 | { | |
265 | 204 | return mapping.getKeys(); |
266 | } | |
267 | ||
268 | /** | |
269 | * Returns an Iterator over all known service names beginning with | |
270 | * the provided prefix. | |
271 | * | |
272 | * @param prefix The prefix against which to test. | |
273 | * @return An Iterator of service names which match the prefix. | |
274 | */ | |
275 | @SuppressWarnings("unchecked") | |
276 | public Iterator<String> getServiceNames(String prefix) | |
277 | { | |
278 | 0 | return mapping.getKeys(prefix); |
279 | } | |
280 | ||
281 | /** | |
282 | * Performs early initialization of specified service. | |
283 | * | |
284 | * @param name The name of the service (generally the | |
285 | * <code>SERVICE_NAME</code> constant of the service's interface | |
286 | * definition). | |
287 | * @exception InitializationException Initialization of this | |
288 | * service was not successful. | |
289 | */ | |
290 | public synchronized void initService(String name) | |
291 | throws InitializationException | |
292 | { | |
293 | // Calling getServiceInstance(name) assures that the Service | |
294 | // implementation has its name and broker reference set before | |
295 | // initialization. | |
296 | 254 | Service instance = getServiceInstance(name); |
297 | ||
298 | 254 | if (!instance.getInit()) |
299 | { | |
300 | // this call might result in an indirect recursion | |
301 | 192 | instance.init(); |
302 | } | |
303 | 222 | } |
304 | ||
305 | /** | |
306 | * Performs early initialization of all services. Failed early | |
307 | * initialization of a Service may be non-fatal to the system, | |
308 | * thus any exceptions are logged and the initialization process | |
309 | * continues. | |
310 | */ | |
311 | public void initServices() | |
312 | { | |
313 | try | |
314 | { | |
315 | 0 | initServices(false); |
316 | } | |
317 | 0 | catch (InstantiationException notThrown) |
318 | { | |
319 | 0 | log.debug("Caught non fatal exception", notThrown); |
320 | } | |
321 | 0 | catch (InitializationException notThrown) |
322 | { | |
323 | 0 | log.debug("Caught non fatal exception", notThrown); |
324 | 0 | } |
325 | 0 | } |
326 | ||
327 | /** | |
328 | * Performs early initialization of all services. You can decide | |
329 | * to handle failed initializations if you wish, but then | |
330 | * after one service fails, the other will not have the chance | |
331 | * to initialize. | |
332 | * | |
333 | * @param report <code>true</code> if you want exceptions thrown. | |
334 | */ | |
335 | public void initServices(boolean report) | |
336 | throws InstantiationException, InitializationException | |
337 | { | |
338 | 104 | if (report) |
339 | { | |
340 | // Throw exceptions | |
341 | 0 | for (Iterator<String> names = getServiceNames(); names.hasNext();) |
342 | { | |
343 | 0 | doInitService(names.next()); |
344 | } | |
345 | } | |
346 | else | |
347 | { | |
348 | // Eat exceptions | |
349 | 104 | for (Iterator<String> names = getServiceNames(); names.hasNext();) |
350 | { | |
351 | try | |
352 | { | |
353 | 786 | doInitService(names.next()); |
354 | } | |
355 | // In case of an exception, file an error message; the | |
356 | // system may be still functional, though. | |
357 | 0 | catch (InstantiationException e) |
358 | { | |
359 | 0 | log.error(e); |
360 | } | |
361 | 32 | catch (InitializationException e) |
362 | { | |
363 | 32 | log.error(e); |
364 | 786 | } |
365 | } | |
366 | } | |
367 | 104 | log.info("Finished initializing all services!"); |
368 | 104 | } |
369 | ||
370 | /** | |
371 | * Internal utility method for use in {@link #initServices(boolean)} | |
372 | * to prevent duplication of code. | |
373 | */ | |
374 | private void doInitService(String name) | |
375 | throws InstantiationException, InitializationException | |
376 | { | |
377 | // Only start up services that have their earlyInit flag set. | |
378 | 786 | if (getConfiguration(name).getBoolean("earlyInit", false)) |
379 | { | |
380 | 254 | log.info("Start Initializing service (early): " + name); |
381 | 254 | initService(name); |
382 | 222 | log.info("Finish Initializing service (early): " + name); |
383 | } | |
384 | 754 | } |
385 | ||
386 | /** | |
387 | * Shuts down a <code>Service</code>, releasing resources | |
388 | * allocated by an <code>Service</code>, and returns it to its | |
389 | * initial (uninitialized) state. | |
390 | * | |
391 | * @param name The name of the <code>Service</code> to be | |
392 | * uninitialized. | |
393 | */ | |
394 | public synchronized void shutdownService(String name) | |
395 | { | |
396 | try | |
397 | { | |
398 | 818 | Service service = getServiceInstance(name); |
399 | 818 | if (service != null && service.getInit()) |
400 | { | |
401 | 432 | service.shutdown(); |
402 | ||
403 | 432 | if (service.getInit() && service instanceof BaseService) |
404 | { | |
405 | // BaseService::shutdown() does this by default, | |
406 | // but could've been overriden poorly. | |
407 | 2 | ((BaseService) service).setInit(false); |
408 | } | |
409 | } | |
410 | } | |
411 | 0 | catch (InstantiationException e) |
412 | { | |
413 | // Assuming harmless -- log the error and continue. | |
414 | 0 | log.error("Shutdown of a nonexistent Service '" |
415 | + name + "' was requested", e); | |
416 | 818 | } |
417 | 818 | } |
418 | ||
419 | /** | |
420 | * Shuts down all Turbine services, releasing allocated resources and | |
421 | * returning them to their initial (uninitialized) state. | |
422 | */ | |
423 | public void shutdownServices() | |
424 | { | |
425 | 98 | log.info("Shutting down all services!"); |
426 | ||
427 | 98 | String serviceName = null; |
428 | ||
429 | /* | |
430 | * Now we want to reverse the order of | |
431 | * this list. This functionality should be added to | |
432 | * the ExtendedProperties in the commons but | |
433 | * this will fix the problem for now. | |
434 | */ | |
435 | ||
436 | 98 | ArrayList<String> reverseServicesList = new ArrayList<String>(); |
437 | ||
438 | 98 | for (Iterator<String> serviceNames = getServiceNames(); serviceNames.hasNext();) |
439 | { | |
440 | 816 | serviceName = serviceNames.next(); |
441 | 816 | reverseServicesList.add(0, serviceName); |
442 | } | |
443 | ||
444 | 98 | for (Iterator<String> serviceNames = reverseServicesList.iterator(); serviceNames.hasNext();) |
445 | { | |
446 | 816 | serviceName = serviceNames.next(); |
447 | 816 | log.info("Shutting down service: " + serviceName); |
448 | 816 | shutdownService(serviceName); |
449 | } | |
450 | 98 | } |
451 | ||
452 | /** | |
453 | * Returns an instance of requested Service. | |
454 | * | |
455 | * @param name The name of the Service requested. | |
456 | * @return An instance of requested Service. | |
457 | * @exception InstantiationException if the service is unknown or | |
458 | * can't be initialized. | |
459 | */ | |
460 | public Object getService(String name) throws InstantiationException | |
461 | { | |
462 | Service service; | |
463 | ||
464 | 5290 | if (this.isLocalService(name)) |
465 | { | |
466 | try | |
467 | { | |
468 | 4176 | service = getServiceInstance(name); |
469 | 4176 | if (!service.getInit()) |
470 | { | |
471 | 454 | synchronized (service.getClass()) |
472 | { | |
473 | 454 | if (!service.getInit()) |
474 | { | |
475 | 454 | log.info("Start Initializing service (late): " + name); |
476 | 454 | service.init(); |
477 | 454 | log.info("Finish Initializing service (late): " + name); |
478 | } | |
479 | 454 | } |
480 | } | |
481 | 4176 | if (!service.getInit()) |
482 | { | |
483 | // this exception will be caught & rethrown by this very method. | |
484 | // getInit() returning false indicates some initialization issue, | |
485 | // which in turn prevents the InitableBroker from passing a | |
486 | // reference to a working instance of the initable to the client. | |
487 | 0 | throw new InitializationException( |
488 | "init() failed to initialize service " + name); | |
489 | } | |
490 | 4176 | return service; |
491 | } | |
492 | 0 | catch (InitializationException e) |
493 | { | |
494 | 0 | throw new InstantiationException("Service " + name + |
495 | " failed to initialize", e); | |
496 | } | |
497 | } | |
498 | 1114 | else if (this.isNonLocalService(name)) |
499 | { | |
500 | 1080 | return this.getNonLocalService(name); |
501 | } | |
502 | else | |
503 | { | |
504 | 34 | throw new InstantiationException( |
505 | "ServiceBroker: unknown service " + name | |
506 | + " requested"); | |
507 | } | |
508 | } | |
509 | ||
510 | /** | |
511 | * Retrieves an instance of a Service without triggering late | |
512 | * initialization. | |
513 | * | |
514 | * Early initialization of a Service can require access to Service | |
515 | * properties. The Service must have its name and serviceBroker | |
516 | * set by then. Therefore, before calling | |
517 | * Initable.initClass(Object), the class must be instantiated with | |
518 | * InitableBroker.getInitableInstance(), and | |
519 | * Service.setServiceBroker() and Service.setName() must be | |
520 | * called. This calls for two - level accessing the Services | |
521 | * instances. | |
522 | * | |
523 | * @param name The name of the service requested. | |
524 | * @exception InstantiationException The service is unknown or | |
525 | * can't be initialized. | |
526 | */ | |
527 | protected Service getServiceInstance(String name) | |
528 | throws InstantiationException | |
529 | { | |
530 | 5248 | Service service = services.get(name); |
531 | ||
532 | 5248 | if (service == null) |
533 | { | |
534 | ||
535 | 426 | String className=null; |
536 | 426 | if (!this.isLocalService(name)) |
537 | { | |
538 | 0 | throw new InstantiationException( |
539 | "ServiceBroker: unknown service " + name | |
540 | + " requested"); | |
541 | } | |
542 | try | |
543 | { | |
544 | 426 | className = mapping.getString(name); |
545 | 426 | service = services.get(className); |
546 | ||
547 | 426 | if (service == null) |
548 | { | |
549 | try | |
550 | { | |
551 | 426 | service = (Service) Class.forName(className).newInstance(); |
552 | ||
553 | // check if the newly created service is also a | |
554 | // service provider - if so then remember it | |
555 | 426 | if (service instanceof TurbineServiceProvider) |
556 | { | |
557 | 60 | this.serviceProviderInstanceMap.put(name,service); |
558 | } | |
559 | ||
560 | } | |
561 | // those two errors must be passed to the VM | |
562 | 0 | catch (ThreadDeath t) |
563 | { | |
564 | 0 | throw t; |
565 | } | |
566 | 0 | catch (OutOfMemoryError t) |
567 | { | |
568 | 0 | throw t; |
569 | } | |
570 | 0 | catch (Throwable t) |
571 | { | |
572 | // Used to indicate error condition. | |
573 | 0 | String msg = null; |
574 | ||
575 | 0 | if (t instanceof NoClassDefFoundError) |
576 | { | |
577 | 0 | msg = "A class referenced by " + className + |
578 | " is unavailable. Check your jars and classes."; | |
579 | } | |
580 | 0 | else if (t instanceof ClassNotFoundException) |
581 | { | |
582 | 0 | msg = "Class " + className + |
583 | " is unavailable. Check your jars and classes."; | |
584 | } | |
585 | 0 | else if (t instanceof ClassCastException) |
586 | { | |
587 | 0 | msg = "Class " + className + |
588 | " doesn't implement the Service interface"; | |
589 | } | |
590 | else | |
591 | { | |
592 | 0 | msg = "Failed to instantiate " + className; |
593 | } | |
594 | ||
595 | 0 | throw new InstantiationException(msg, t); |
596 | 426 | } |
597 | } | |
598 | } | |
599 | 0 | catch (ClassCastException e) |
600 | { | |
601 | 0 | throw new InstantiationException("ServiceBroker: Class " |
602 | + className | |
603 | + " does not implement Service interface.", e); | |
604 | } | |
605 | 0 | catch (InstantiationException e) |
606 | { | |
607 | 0 | throw new InstantiationException( |
608 | "Failed to instantiate service " + name, e); | |
609 | 426 | } |
610 | 426 | service.setServiceBroker(this); |
611 | 426 | service.setName(name); |
612 | 426 | services.put(name, service); |
613 | } | |
614 | ||
615 | 5248 | return service; |
616 | } | |
617 | ||
618 | /** | |
619 | * Returns the configuration for the specified service. | |
620 | * | |
621 | * @param name The name of the service. | |
622 | * @return Configuration of requested Service. | |
623 | */ | |
624 | public Configuration getConfiguration(String name) | |
625 | { | |
626 | 1136 | return configuration.subset(SERVICE_PREFIX + name); |
627 | } | |
628 | ||
629 | /** | |
630 | * Set the application root. | |
631 | * | |
632 | * @param applicationRoot application root | |
633 | */ | |
634 | public void setApplicationRoot(String applicationRoot) | |
635 | { | |
636 | 104 | this.applicationRoot = applicationRoot; |
637 | 104 | } |
638 | ||
639 | /** | |
640 | * Get the application root as set by | |
641 | * the parent application. | |
642 | * | |
643 | * @return String application root | |
644 | */ | |
645 | public String getApplicationRoot() | |
646 | { | |
647 | 0 | return applicationRoot; |
648 | } | |
649 | ||
650 | /** | |
651 | * Determines if the requested service is managed by this | |
652 | * ServiceBroker. | |
653 | * | |
654 | * @param name The name of the Service requested. | |
655 | * @return true if the service is managed by the this ServiceBroker | |
656 | */ | |
657 | protected boolean isLocalService(String name) | |
658 | { | |
659 | 5716 | return this.mapping.containsKey(name); |
660 | } | |
661 | ||
662 | /** | |
663 | * Determines if the requested service is managed by an initialized | |
664 | * TurbineServiceProvider. We use the service names to lookup | |
665 | * the TurbineServiceProvider to ensure that we get a fully | |
666 | * inititialized service. | |
667 | * | |
668 | * @param name The name of the Service requested. | |
669 | * @return true if the service is managed by a TurbineServiceProvider | |
670 | */ | |
671 | protected boolean isNonLocalService(String name) | |
672 | { | |
673 | 1114 | String serviceName = null; |
674 | 1114 | TurbineServiceProvider turbineServiceProvider = null; |
675 | 1114 | Enumeration<String> list = this.serviceProviderInstanceMap.keys(); |
676 | ||
677 | 1148 | while (list.hasMoreElements()) |
678 | { | |
679 | 1114 | serviceName = list.nextElement(); |
680 | 1114 | turbineServiceProvider = (TurbineServiceProvider) this.getService(serviceName); |
681 | ||
682 | 1114 | if (turbineServiceProvider.exists(name)) |
683 | { | |
684 | 1080 | return true; |
685 | } | |
686 | } | |
687 | ||
688 | 34 | return false; |
689 | } | |
690 | ||
691 | /** | |
692 | * Get a non-local service managed by a TurbineServiceProvider. | |
693 | * | |
694 | * @param name The name of the Service requested. | |
695 | * @return the requested service | |
696 | * @throws InstantiationException the service couldn't be instantiated | |
697 | */ | |
698 | protected Object getNonLocalService(String name) | |
699 | throws InstantiationException | |
700 | { | |
701 | 1080 | String serviceName = null; |
702 | 1080 | TurbineServiceProvider turbineServiceProvider = null; |
703 | 1080 | Enumeration<String> list = this.serviceProviderInstanceMap.keys(); |
704 | ||
705 | 1080 | while (list.hasMoreElements()) |
706 | { | |
707 | 1080 | serviceName = list.nextElement(); |
708 | 1080 | turbineServiceProvider = (TurbineServiceProvider) this.getService(serviceName); |
709 | ||
710 | 1080 | if (turbineServiceProvider.exists(name)) |
711 | { | |
712 | 1080 | return turbineServiceProvider.get(name); |
713 | } | |
714 | } | |
715 | ||
716 | 0 | throw new InstantiationException( |
717 | "ServiceBroker: unknown non-local service " + name | |
718 | + " requested"); | |
719 | } | |
720 | } |