Pierre De Rop | 3a00a21 | 2015-03-01 09:27:46 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
| 3 | * or more contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. The ASF licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.apache.felix.dm.impl; |
| 20 | |
| 21 | import java.lang.reflect.InvocationTargetException; |
| 22 | import java.lang.reflect.Proxy; |
| 23 | import java.util.AbstractMap; |
| 24 | import java.util.Arrays; |
| 25 | import java.util.Dictionary; |
| 26 | import java.util.HashSet; |
| 27 | import java.util.Hashtable; |
| 28 | import java.util.Map; |
| 29 | import java.util.Set; |
| 30 | |
| 31 | import org.apache.felix.dm.Component; |
| 32 | import org.apache.felix.dm.ComponentDeclaration; |
| 33 | import org.apache.felix.dm.ServiceDependency; |
| 34 | import org.apache.felix.dm.context.AbstractDependency; |
| 35 | import org.apache.felix.dm.context.DependencyContext; |
| 36 | import org.apache.felix.dm.context.Event; |
| 37 | import org.apache.felix.dm.context.EventType; |
| 38 | import org.apache.felix.dm.tracker.ServiceTracker; |
| 39 | import org.apache.felix.dm.tracker.ServiceTrackerCustomizer; |
| 40 | import org.osgi.framework.BundleContext; |
| 41 | import org.osgi.framework.Constants; |
| 42 | import org.osgi.framework.InvalidSyntaxException; |
| 43 | import org.osgi.framework.ServiceReference; |
| 44 | |
| 45 | /** |
| 46 | * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| 47 | */ |
| 48 | public class ServiceDependencyImpl extends AbstractDependency<ServiceDependency> implements ServiceDependency, ServiceTrackerCustomizer { |
| 49 | protected volatile ServiceTracker m_tracker; |
| 50 | protected String m_swap; |
| 51 | protected volatile Class<?> m_trackedServiceName; |
| 52 | private volatile String m_trackedServiceFilter; |
| 53 | private volatile String m_trackedServiceFilterUnmodified; |
| 54 | private volatile ServiceReference m_trackedServiceReference; |
| 55 | private volatile Object m_defaultImplementation; |
| 56 | private volatile Object m_defaultImplementationInstance; |
| 57 | private volatile Object m_nullObject; |
| 58 | private boolean m_debug = false; |
| 59 | private String m_debugKey; |
| 60 | private long m_trackedServiceReferenceId; |
| 61 | |
| 62 | public ServiceDependency setDebug(String debugKey) { |
| 63 | m_debugKey = debugKey; |
| 64 | m_debug = true; |
| 65 | return this; |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Entry to wrap service properties behind a Map. |
| 70 | */ |
| 71 | private static final class ServicePropertiesMapEntry implements Map.Entry<String, Object> { |
| 72 | private final String m_key; |
| 73 | private Object m_value; |
| 74 | |
| 75 | public ServicePropertiesMapEntry(String key, Object value) { |
| 76 | m_key = key; |
| 77 | m_value = value; |
| 78 | } |
| 79 | |
| 80 | public String getKey() { |
| 81 | return m_key; |
| 82 | } |
| 83 | |
| 84 | public Object getValue() { |
| 85 | return m_value; |
| 86 | } |
| 87 | |
| 88 | public String toString() { |
| 89 | return m_key + "=" + m_value; |
| 90 | } |
| 91 | |
| 92 | public Object setValue(Object value) { |
| 93 | Object oldValue = m_value; |
| 94 | m_value = value; |
| 95 | return oldValue; |
| 96 | } |
| 97 | |
| 98 | @SuppressWarnings("unchecked") |
| 99 | public boolean equals(Object o) { |
| 100 | if (!(o instanceof Map.Entry)) { |
| 101 | return false; |
| 102 | } |
| 103 | Map.Entry<String, Object> e = (Map.Entry<String, Object>) o; |
| 104 | return eq(m_key, e.getKey()) && eq(m_value, e.getValue()); |
| 105 | } |
| 106 | |
| 107 | public int hashCode() { |
| 108 | return ((m_key == null) ? 0 : m_key.hashCode()) ^ ((m_value == null) ? 0 : m_value.hashCode()); |
| 109 | } |
| 110 | |
| 111 | private static final boolean eq(Object o1, Object o2) { |
| 112 | return (o1 == null ? o2 == null : o1.equals(o2)); |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Wraps service properties behind a Map. |
| 118 | */ |
| 119 | private final static class ServicePropertiesMap extends AbstractMap<String, Object> { |
| 120 | private final ServiceReference m_ref; |
| 121 | |
| 122 | public ServicePropertiesMap(ServiceReference ref) { |
| 123 | m_ref = ref; |
| 124 | } |
| 125 | |
| 126 | public Object get(Object key) { |
| 127 | return m_ref.getProperty(key.toString()); |
| 128 | } |
| 129 | |
| 130 | public int size() { |
| 131 | return m_ref.getPropertyKeys().length; |
| 132 | } |
| 133 | |
| 134 | public Set<Map.Entry<String, Object>> entrySet() { |
| 135 | Set<Map.Entry<String, Object>> set = new HashSet<>(); |
| 136 | String[] keys = m_ref.getPropertyKeys(); |
| 137 | for (int i = 0; i < keys.length; i++) { |
| 138 | set.add(new ServicePropertiesMapEntry(keys[i], m_ref.getProperty(keys[i]))); |
| 139 | } |
| 140 | return set; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | public ServiceDependencyImpl() { |
| 145 | } |
| 146 | |
| 147 | public ServiceDependencyImpl(ServiceDependencyImpl prototype) { |
| 148 | super(prototype); |
| 149 | m_trackedServiceName = prototype.m_trackedServiceName; |
| 150 | m_nullObject = prototype.m_nullObject; |
| 151 | m_trackedServiceFilter = prototype.m_trackedServiceFilter; |
| 152 | m_trackedServiceFilterUnmodified = prototype.m_trackedServiceFilterUnmodified; |
| 153 | m_trackedServiceReference = prototype.m_trackedServiceReference; |
| 154 | m_autoConfigInstance = prototype.m_autoConfigInstance; |
| 155 | m_defaultImplementation = prototype.m_defaultImplementation; |
| 156 | m_autoConfig = prototype.m_autoConfig; |
| 157 | } |
| 158 | |
| 159 | // --- CREATION |
| 160 | |
| 161 | public ServiceDependency setCallbacks(Object instance, String added, String changed, String removed, String swapped) { |
| 162 | setCallbacks(instance, added, changed, removed); |
| 163 | m_swap = swapped; |
| 164 | return this; |
| 165 | } |
| 166 | |
| 167 | public ServiceDependency setCallbacks(String added, String changed, String removed, String swapped) { |
| 168 | setCallbacks(added, changed, removed); |
| 169 | m_swap = swapped; |
| 170 | return this; |
| 171 | } |
| 172 | |
| 173 | @Override |
| 174 | public ServiceDependency setDefaultImplementation(Object implementation) { |
| 175 | ensureNotActive(); |
| 176 | m_defaultImplementation = implementation; |
| 177 | return this; |
| 178 | } |
| 179 | |
| 180 | @Override |
| 181 | public ServiceDependency setService(Class<?> serviceName) { |
| 182 | setService(serviceName, null, null); |
| 183 | return this; |
| 184 | } |
| 185 | |
| 186 | public ServiceDependency setService(Class<?> serviceName, String serviceFilter) { |
| 187 | setService(serviceName, null, serviceFilter); |
| 188 | return this; |
| 189 | } |
| 190 | |
| 191 | public ServiceDependency setService(String serviceFilter) { |
| 192 | if (serviceFilter == null) { |
| 193 | throw new IllegalArgumentException("Service filter cannot be null."); |
| 194 | } |
| 195 | setService(null, null, serviceFilter); |
| 196 | return this; |
| 197 | } |
| 198 | |
| 199 | public ServiceDependency setService(Class<?> serviceName, ServiceReference serviceReference) { |
| 200 | setService(serviceName, serviceReference, null); |
| 201 | return this; |
| 202 | } |
| 203 | |
| 204 | @Override |
| 205 | public void start() { |
| 206 | if (m_trackedServiceName != null) { |
| 207 | BundleContext ctx = m_component.getBundleContext(); |
| 208 | if (m_trackedServiceFilter != null) { |
| 209 | try { |
| 210 | m_tracker = new ServiceTracker(ctx, ctx.createFilter(m_trackedServiceFilter), this); |
| 211 | } catch (InvalidSyntaxException e) { |
| 212 | throw new IllegalStateException("Invalid filter definition for dependency: " |
| 213 | + m_trackedServiceFilter); |
| 214 | } |
| 215 | } else if (m_trackedServiceReference != null) { |
| 216 | m_tracker = new ServiceTracker(ctx, m_trackedServiceReference, this); |
| 217 | } else { |
| 218 | m_tracker = new ServiceTracker(ctx, m_trackedServiceName.getName(), this); |
| 219 | } |
| 220 | } else { |
| 221 | throw new IllegalStateException("Could not create tracker for dependency, no service name specified."); |
| 222 | } |
| 223 | if (m_debug) { |
| 224 | m_tracker.setDebug(m_debugKey); |
| 225 | } |
| 226 | m_tracker.open(); |
| 227 | super.start(); |
| 228 | } |
| 229 | |
| 230 | @Override |
| 231 | public void stop() { |
| 232 | m_tracker.close(); |
| 233 | m_tracker = null; |
| 234 | super.stop(); |
| 235 | } |
| 236 | |
| 237 | @Override |
| 238 | public Object addingService(ServiceReference reference) { |
| 239 | try { |
| 240 | return m_component.getBundleContext().getService(reference); |
| 241 | } catch (IllegalStateException e) { |
| 242 | // most likely our bundle is being stopped. Only log an exception if our component is enabled. |
| 243 | if (m_component.isActive()) { |
| 244 | m_component.getLogger().warn("could not handle service dependency for component %s", e, |
| 245 | m_component.getComponentDeclaration().getClassName()); |
| 246 | } |
| 247 | return null; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | @Override |
| 252 | public void addedService(ServiceReference reference, Object service) { |
| 253 | if (m_debug) { |
| 254 | System.out.println(m_debugKey + " addedService: ref=" + reference + ", service=" + service); |
| 255 | } |
| 256 | m_component.handleEvent(this, EventType.ADDED, |
| 257 | new ServiceEventImpl(m_component.getBundle(), m_component.getBundleContext(), reference, service)); |
| 258 | } |
| 259 | |
| 260 | @Override |
| 261 | public void modifiedService(ServiceReference reference, Object service) { |
| 262 | m_component.handleEvent(this, EventType.CHANGED, |
| 263 | new ServiceEventImpl(m_component.getBundle(), m_component.getBundleContext(), reference, service)); |
| 264 | } |
| 265 | |
| 266 | @Override |
| 267 | public void removedService(ServiceReference reference, Object service) { |
| 268 | m_component.handleEvent(this, EventType.REMOVED, |
| 269 | new ServiceEventImpl(m_component.getBundle(), m_component.getBundleContext(), reference, service)); |
| 270 | } |
| 271 | |
| 272 | @Override |
| 273 | public void invokeCallback(EventType type, Event ... events) { |
| 274 | switch (type) { |
| 275 | case ADDED: |
| 276 | if (m_add != null) { |
| 277 | invoke (m_add, events[0], getInstances()); |
| 278 | } |
| 279 | break; |
| 280 | case CHANGED: |
| 281 | if (m_change != null) { |
| 282 | invoke (m_change, events[0], getInstances()); |
| 283 | } |
| 284 | break; |
| 285 | case REMOVED: |
| 286 | if (m_remove != null) { |
| 287 | invoke (m_remove, events[0], getInstances()); |
| 288 | } |
| 289 | break; |
| 290 | case SWAPPED: |
| 291 | if (m_swap != null) { |
| 292 | ServiceEventImpl oldE = (ServiceEventImpl) events[0]; |
| 293 | ServiceEventImpl newE = (ServiceEventImpl) events[1]; |
| 294 | invokeSwap(m_swap, oldE.getReference(), oldE.getEvent(), newE.getReference(), newE.getEvent(), |
| 295 | getInstances()); |
| 296 | } |
| 297 | break; |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | @Override |
| 302 | public Class<?> getAutoConfigType() { |
| 303 | return m_trackedServiceName; |
| 304 | } |
| 305 | |
| 306 | @Override |
| 307 | public DependencyContext createCopy() { |
| 308 | return new ServiceDependencyImpl(this); |
| 309 | } |
| 310 | |
| 311 | @Override |
| 312 | public String getName() { |
| 313 | StringBuilder sb = new StringBuilder(); |
| 314 | if (m_trackedServiceName != null) { |
| 315 | sb.append(m_trackedServiceName.getName()); |
| 316 | if (m_trackedServiceFilterUnmodified != null) { |
| 317 | sb.append(' '); |
| 318 | sb.append(m_trackedServiceFilterUnmodified); |
| 319 | } |
| 320 | } |
| 321 | if (m_trackedServiceReference != null) { |
| 322 | sb.append("{service.id=" + m_trackedServiceReference.getProperty(Constants.SERVICE_ID) + "}"); |
| 323 | } |
| 324 | return sb.toString(); |
| 325 | } |
| 326 | |
| 327 | @Override |
| 328 | public String getSimpleName() { |
| 329 | if (m_trackedServiceName != null) { |
| 330 | return m_trackedServiceName.getName(); |
| 331 | } |
| 332 | return null; |
| 333 | } |
| 334 | |
| 335 | @Override |
| 336 | public String getFilter() { |
| 337 | if (m_trackedServiceFilterUnmodified != null) { |
| 338 | return m_trackedServiceFilterUnmodified; |
| 339 | } else if (m_trackedServiceReference != null) { |
| 340 | return new StringBuilder("(").append(Constants.SERVICE_ID).append("=").append( |
| 341 | String.valueOf(m_trackedServiceReferenceId)).append(")").toString(); |
| 342 | } else { |
| 343 | return null; |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | @Override |
| 348 | public String getType() { |
| 349 | return "service"; |
| 350 | } |
| 351 | |
| 352 | @SuppressWarnings("unchecked") |
| 353 | @Override |
| 354 | public Dictionary<String, Object> getProperties() { |
| 355 | ServiceEventImpl se = (ServiceEventImpl) m_component.getDependencyEvent(this); |
| 356 | if (se != null) { |
| 357 | if (m_propagateCallbackInstance != null && m_propagateCallbackMethod != null) { |
| 358 | try { |
Pierre De Rop | 17274a7 | 2016-02-09 23:43:14 +0000 | [diff] [blame] | 359 | CallbackTypeDef callbackInfo = new CallbackTypeDef(new Class[][] { { ServiceReference.class, Object.class }, { ServiceReference.class } }, |
| 360 | new Object[][] { { se.getReference(), se.getEvent() }, { se.getReference() } }); |
| 361 | return (Dictionary<String, Object>) InvocationUtil.invokeCallbackMethod(m_propagateCallbackInstance, m_propagateCallbackMethod, callbackInfo.m_sigs, callbackInfo.m_args); |
Pierre De Rop | 3a00a21 | 2015-03-01 09:27:46 +0000 | [diff] [blame] | 362 | } catch (InvocationTargetException e) { |
| 363 | m_component.getLogger().warn("Exception while invoking callback method", e.getCause()); |
| 364 | } catch (Throwable e) { |
| 365 | m_component.getLogger().warn("Exception while trying to invoke callback method", e); |
| 366 | } |
| 367 | throw new IllegalStateException("Could not invoke callback"); |
| 368 | } else { |
| 369 | Hashtable<String, Object> props = new Hashtable<>(); |
| 370 | String[] keys = se.getReference().getPropertyKeys(); |
| 371 | for (int i = 0; i < keys.length; i++) { |
| 372 | if (!(keys[i].equals(Constants.SERVICE_ID) || keys[i].equals(Constants.SERVICE_PID))) { |
| 373 | props.put(keys[i], se.getReference().getProperty(keys[i])); |
| 374 | } |
| 375 | } |
| 376 | return props; |
| 377 | } |
| 378 | } else { |
| 379 | throw new IllegalStateException("cannot find service reference"); |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | /** Internal method to set the name, service reference and/or filter. */ |
| 384 | private void setService(Class<?> serviceName, ServiceReference serviceReference, String serviceFilter) { |
| 385 | ensureNotActive(); |
| 386 | if (serviceName == null) { |
| 387 | m_trackedServiceName = Object.class; |
| 388 | } |
| 389 | else { |
| 390 | m_trackedServiceName = serviceName; |
| 391 | } |
| 392 | if (serviceFilter != null) { |
| 393 | m_trackedServiceFilterUnmodified = serviceFilter; |
| 394 | if (serviceName == null) { |
| 395 | m_trackedServiceFilter = serviceFilter; |
| 396 | } |
| 397 | else { |
| 398 | m_trackedServiceFilter = "(&(" + Constants.OBJECTCLASS + "=" + serviceName.getName() + ")" |
| 399 | + serviceFilter + ")"; |
| 400 | } |
| 401 | } |
| 402 | else { |
| 403 | m_trackedServiceFilterUnmodified = null; |
| 404 | m_trackedServiceFilter = null; |
| 405 | } |
| 406 | if (serviceReference != null) { |
| 407 | m_trackedServiceReference = serviceReference; |
| 408 | if (serviceFilter != null) { |
| 409 | throw new IllegalArgumentException("Cannot specify both a filter and a service reference."); |
| 410 | } |
| 411 | m_trackedServiceReferenceId = (Long) m_trackedServiceReference.getProperty(Constants.SERVICE_ID); |
| 412 | } |
| 413 | else { |
| 414 | m_trackedServiceReference = null; |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | @Override |
| 419 | public Object getDefaultService(boolean nullObject) { |
| 420 | Object service = null; |
| 421 | if (isAutoConfig()) { |
| 422 | service = getDefaultImplementation(); |
| 423 | if (service == null && nullObject) { |
| 424 | service = getNullObject(); |
| 425 | } |
| 426 | } |
| 427 | return service; |
| 428 | } |
| 429 | |
| 430 | private Object getNullObject() { |
| 431 | if (m_nullObject == null) { |
| 432 | Class<?> trackedServiceName; |
| 433 | trackedServiceName = m_trackedServiceName; |
| 434 | try { |
| 435 | m_nullObject = Proxy.newProxyInstance(trackedServiceName.getClassLoader(), |
| 436 | new Class[] { trackedServiceName }, new DefaultNullObject()); |
| 437 | } |
| 438 | catch (Throwable err) { |
| 439 | m_component.getLogger().err("Could not create null object for %s.", err, trackedServiceName); |
| 440 | } |
| 441 | } |
| 442 | return m_nullObject; |
| 443 | } |
| 444 | |
| 445 | private Object getDefaultImplementation() { |
| 446 | if (m_defaultImplementation != null) { |
| 447 | if (m_defaultImplementation instanceof Class) { |
| 448 | try { |
| 449 | m_defaultImplementationInstance = ((Class<?>) m_defaultImplementation).newInstance(); |
| 450 | } |
| 451 | catch (Throwable e) { |
| 452 | m_component.getLogger().err("Could not create default implementation instance of class %s.", e, |
| 453 | m_defaultImplementation); |
| 454 | } |
| 455 | } |
| 456 | else { |
| 457 | m_defaultImplementationInstance = m_defaultImplementation; |
| 458 | } |
| 459 | } |
| 460 | return m_defaultImplementationInstance; |
| 461 | } |
| 462 | |
| 463 | public void invoke(String method, Event e, Object[] instances) { |
| 464 | ServiceEventImpl se = (ServiceEventImpl) e; |
| 465 | ServicePropertiesMap propertiesMap = new ServicePropertiesMap(se.getReference()); |
| 466 | Dictionary<?,?> properties = se.getProperties(); |
| 467 | m_component.invokeCallbackMethod(instances, method, |
| 468 | new Class[][]{ |
| 469 | {Component.class, ServiceReference.class, m_trackedServiceName}, |
| 470 | {Component.class, ServiceReference.class, Object.class}, |
| 471 | {Component.class, ServiceReference.class}, |
| 472 | {Component.class, m_trackedServiceName}, |
| 473 | {Component.class, Object.class}, |
| 474 | {Component.class}, |
| 475 | {Component.class, Map.class, m_trackedServiceName}, |
| 476 | {ServiceReference.class, m_trackedServiceName}, |
| 477 | {ServiceReference.class, Object.class}, |
| 478 | {ServiceReference.class}, |
| 479 | {m_trackedServiceName}, |
| 480 | {m_trackedServiceName, Map.class}, |
| 481 | {Map.class, m_trackedServiceName}, |
| 482 | {m_trackedServiceName, Dictionary.class}, |
| 483 | {Dictionary.class, m_trackedServiceName}, |
| 484 | {Object.class}, |
| 485 | {}}, |
| 486 | |
| 487 | new Object[][]{ |
| 488 | {m_component, se.getReference(), se.getEvent()}, |
| 489 | {m_component, se.getReference(), se.getEvent()}, |
| 490 | {m_component, se.getReference()}, |
| 491 | {m_component, se.getEvent()}, |
| 492 | {m_component, se.getEvent()}, |
| 493 | {m_component}, |
| 494 | {m_component, propertiesMap, se.getEvent()}, |
| 495 | {se.getReference(), se.getEvent()}, |
| 496 | {se.getReference(), se.getEvent()}, |
| 497 | {se.getReference()}, |
| 498 | {se.getEvent()}, |
| 499 | {se.getEvent(), propertiesMap}, |
| 500 | {propertiesMap, se.getEvent()}, |
| 501 | {se.getEvent(), properties}, |
| 502 | {properties, se.getEvent()}, |
| 503 | {se.getEvent()}, |
| 504 | {}} |
| 505 | ); |
| 506 | } |
| 507 | |
| 508 | public void invokeSwap(String swapMethod, ServiceReference previousReference, Object previous, |
| 509 | ServiceReference currentReference, Object current, Object[] instances) { |
| 510 | if (m_debug) { |
| 511 | System.out.println("invoke swap: " + swapMethod + " on component " + m_component + ", instances: " + Arrays.toString(instances) + " - " + ((ComponentDeclaration)m_component).getState()); |
| 512 | } |
| 513 | try { |
| 514 | m_component.invokeCallbackMethod(instances, swapMethod, |
| 515 | new Class[][]{ |
| 516 | {m_trackedServiceName, m_trackedServiceName}, |
| 517 | {Object.class, Object.class}, |
| 518 | {ServiceReference.class, m_trackedServiceName, ServiceReference.class, m_trackedServiceName}, |
| 519 | {ServiceReference.class, Object.class, ServiceReference.class, Object.class}, |
| 520 | {Component.class, m_trackedServiceName, m_trackedServiceName}, |
| 521 | {Component.class, Object.class, Object.class}, |
| 522 | {Component.class, ServiceReference.class, m_trackedServiceName, ServiceReference.class, m_trackedServiceName}, |
| 523 | {Component.class, ServiceReference.class, Object.class, ServiceReference.class, Object.class}}, |
| 524 | |
| 525 | new Object[][]{ |
| 526 | {previous, current}, |
| 527 | {previous, current}, |
| 528 | {previousReference, previous, currentReference, current}, |
| 529 | {previousReference, previous, currentReference, current}, {m_component, previous, current}, |
| 530 | {m_component, previous, current}, {m_component, previousReference, previous, currentReference, current}, |
| 531 | {m_component, previousReference, previous, currentReference, current}} |
| 532 | ); |
| 533 | } catch (Throwable e) { |
| 534 | m_component.getLogger().err("Could not invoke swap callback", e); |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | @Override |
| 539 | public void swappedService(final ServiceReference reference, final Object service, |
| 540 | final ServiceReference newReference, final Object newService) { |
| 541 | if (m_swap != null) { |
| 542 | // it will not trigger a state change, but the actual swap should be scheduled to prevent things |
| 543 | // getting out of order. |
| 544 | // We delegate the swap handling to the ComponentImpl, which is the class responsible for state management. |
| 545 | // The ComponentImpl will first check if the component is in the proper state so the swap method can be invoked. |
| 546 | m_component.handleEvent(this, EventType.SWAPPED, |
| 547 | new ServiceEventImpl(m_component.getBundle(), m_component.getBundleContext(), reference, service), |
| 548 | new ServiceEventImpl(m_component.getBundle(), m_component.getBundleContext(), newReference, newService)); |
| 549 | } else { |
| 550 | addedService(newReference, newService); |
| 551 | removedService(reference, service); |
| 552 | } |
| 553 | } |
| 554 | } |