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.eclipse.aether;
20
21 import java.io.Closeable;
22 import java.io.File;
23 import java.util.List;
24 import java.util.Map;
25 import java.util.function.Supplier;
26
27 import org.eclipse.aether.artifact.ArtifactTypeRegistry;
28 import org.eclipse.aether.collection.DependencyGraphTransformer;
29 import org.eclipse.aether.collection.DependencyManager;
30 import org.eclipse.aether.collection.DependencySelector;
31 import org.eclipse.aether.collection.DependencyTraverser;
32 import org.eclipse.aether.collection.VersionFilter;
33 import org.eclipse.aether.repository.AuthenticationSelector;
34 import org.eclipse.aether.repository.LocalRepository;
35 import org.eclipse.aether.repository.LocalRepositoryManager;
36 import org.eclipse.aether.repository.MirrorSelector;
37 import org.eclipse.aether.repository.ProxySelector;
38 import org.eclipse.aether.repository.RemoteRepository;
39 import org.eclipse.aether.repository.RepositoryPolicy;
40 import org.eclipse.aether.repository.WorkspaceReader;
41 import org.eclipse.aether.resolution.ArtifactDescriptorPolicy;
42 import org.eclipse.aether.resolution.ResolutionErrorPolicy;
43 import org.eclipse.aether.transfer.TransferListener;
44
45 /**
46 * Defines settings and components that control the repository system. Once initialized, the session object itself is
47 * supposed to be immutable and hence can safely be shared across an entire application and any concurrent threads
48 * reading it. Components that wish to tweak some aspects of an existing session should use the copy constructor of
49 * {@link DefaultRepositorySystemSession} and its mutators to derive a custom session.
50 *
51 * @noimplement This interface is not intended to be implemented by clients.
52 * @noextend This interface is not intended to be extended by clients.
53 */
54 public interface RepositorySystemSession {
55
56 /**
57 * Immutable session that is closeable, should be handled as a resource. These session instances can be
58 * created with {@link SessionBuilder}.
59 *
60 * @noimplement This interface is not intended to be implemented by clients.
61 * @noextend This interface is not intended to be extended by clients.
62 *
63 * @since 2.0.0
64 */
65 interface CloseableSession extends RepositorySystemSession, Closeable {
66 /**
67 * Returns the ID of this closeable session instance. Each closeable session has different ID, unique within
68 * repository system they were created with.
69 *
70 * @return The session ID that is never {@code null}.
71 */
72 String sessionId();
73
74 /**
75 * Copies this session into a pre-populated builder, effectively making a mutable copy of itself, builder builds
76 * <em>same session</em>. Important: this session <em>remains unchanged</em> upon return of this method but
77 * this session and returned builder created session will have <em>same identity</em>. It is up to client code,
78 * will it close only the original (this) session or new session, or both. Important is, that at least one of
79 * the sessions must be closed, and consequence is that once either one is closed, the other session is closed
80 * as well.
81 * <p>
82 * This pattern should be applied in "filter" like constructs, when code needs to alter the incoming session and
83 * subsequently pass it downstream.
84 */
85 SessionBuilder copy();
86
87 /**
88 * Closes the session. The session should be closed by its creator. A closed session should not be used anymore.
89 * This method may be invoked multiple times, but close will act only once (first time).
90 */
91 @Override
92 void close();
93 }
94
95 /**
96 * Builder for building {@link CloseableSession} instances. Builder instances can be created with
97 * {@link RepositorySystem#createSessionBuilder()} method. Instances are not thread-safe nor immutable.
98 * <p>
99 * Important: if you set a stateful member on builder (for example {@link SessionData} or {@link RepositoryCache}),
100 * the builder will create session instances using same provided stateful members, that may lead to unexpected side
101 * effects. Solution for these cases is to not reuse builder instances, or, keep reconfiguring it, or ultimately
102 * provide suppliers that create new instance per each call.
103 *
104 * @noimplement This interface is not intended to be implemented by clients.
105 * @noextend This interface is not intended to be extended by clients.
106 *
107 * @since 2.0.0
108 */
109 interface SessionBuilder {
110 /**
111 * Controls whether the repository system operates in offline mode and avoids/refuses any access to remote
112 * repositories.
113 *
114 * @param offline {@code true} if the repository system is in offline mode, {@code false} otherwise.
115 * @return This session for chaining, never {@code null}.
116 */
117 SessionBuilder setOffline(boolean offline);
118
119 /**
120 * Controls whether repositories declared in artifact descriptors should be ignored during transitive dependency
121 * collection. If enabled, only the repositories originally provided with the collect request will be considered.
122 *
123 * @param ignoreArtifactDescriptorRepositories {@code true} to ignore additional repositories from artifact
124 * descriptors, {@code false} to merge those with the originally
125 * specified repositories.
126 * @return This session for chaining, never {@code null}.
127 */
128 SessionBuilder setIgnoreArtifactDescriptorRepositories(boolean ignoreArtifactDescriptorRepositories);
129
130 /**
131 * Sets the policy which controls whether resolutions errors from remote repositories should be cached.
132 *
133 * @param resolutionErrorPolicy The resolution error policy for this session, may be {@code null} if resolution
134 * errors should generally not be cached.
135 * @return This session for chaining, never {@code null}.
136 */
137 SessionBuilder setResolutionErrorPolicy(ResolutionErrorPolicy resolutionErrorPolicy);
138
139 /**
140 * Sets the policy which controls how errors related to reading artifact descriptors should be handled.
141 *
142 * @param artifactDescriptorPolicy The descriptor error policy for this session, may be {@code null} if descriptor
143 * errors should generally not be tolerated.
144 * @return This session for chaining, never {@code null}.
145 */
146 SessionBuilder setArtifactDescriptorPolicy(ArtifactDescriptorPolicy artifactDescriptorPolicy);
147
148 /**
149 * Sets the global checksum policy. If set, the global checksum policy overrides the checksum policies of the remote
150 * repositories being used for resolution.
151 *
152 * @param checksumPolicy The global checksum policy, may be {@code null}/empty to apply the per-repository policies.
153 * @return This session for chaining, never {@code null}.
154 * @see RepositoryPolicy#CHECKSUM_POLICY_FAIL
155 * @see RepositoryPolicy#CHECKSUM_POLICY_IGNORE
156 * @see RepositoryPolicy#CHECKSUM_POLICY_WARN
157 */
158 SessionBuilder setChecksumPolicy(String checksumPolicy);
159
160 /**
161 * Sets the global update policy. If set, the global update policy overrides the update policies of the remote
162 * repositories being used for resolution.
163 * <p>
164 * This method is meant for code that does not want to distinguish between artifact and metadata policies.
165 * Note: applications should either use get/set updatePolicy (this method and
166 * {@link RepositorySystemSession#getUpdatePolicy()}) or also distinguish between artifact and
167 * metadata update policies (and use other methods), but <em>should not mix the two!</em>
168 *
169 * @param updatePolicy The global update policy, may be {@code null}/empty to apply the per-repository policies.
170 * @return This session for chaining, never {@code null}.
171 * @see RepositoryPolicy#UPDATE_POLICY_ALWAYS
172 * @see RepositoryPolicy#UPDATE_POLICY_DAILY
173 * @see RepositoryPolicy#UPDATE_POLICY_NEVER
174 * @see #setArtifactUpdatePolicy(String)
175 * @see #setMetadataUpdatePolicy(String)
176 */
177 SessionBuilder setUpdatePolicy(String updatePolicy);
178
179 /**
180 * Sets the global artifact update policy. If set, the global update policy overrides the artifact update policies
181 * of the remote repositories being used for resolution.
182 *
183 * @param artifactUpdatePolicy The global update policy, may be {@code null}/empty to apply the per-repository policies.
184 * @return This session for chaining, never {@code null}.
185 * @see RepositoryPolicy#UPDATE_POLICY_ALWAYS
186 * @see RepositoryPolicy#UPDATE_POLICY_DAILY
187 * @see RepositoryPolicy#UPDATE_POLICY_NEVER
188 * @since 2.0.0
189 */
190 SessionBuilder setArtifactUpdatePolicy(String artifactUpdatePolicy);
191
192 /**
193 * Sets the global metadata update policy. If set, the global update policy overrides the metadata update policies
194 * of the remote repositories being used for resolution.
195 *
196 * @param metadataUpdatePolicy The global update policy, may be {@code null}/empty to apply the per-repository policies.
197 * @return This session for chaining, never {@code null}.
198 * @see RepositoryPolicy#UPDATE_POLICY_ALWAYS
199 * @see RepositoryPolicy#UPDATE_POLICY_DAILY
200 * @see RepositoryPolicy#UPDATE_POLICY_NEVER
201 * @since 2.0.0
202 */
203 SessionBuilder setMetadataUpdatePolicy(String metadataUpdatePolicy);
204
205 /**
206 * Sets the local repository manager used during this session. <em>Note:</em> Eventually, a valid session must have
207 * a local repository manager set.
208 *
209 * @param localRepositoryManager The local repository manager used during this session, may be {@code null}.
210 * @return This session for chaining, never {@code null}.
211 */
212 SessionBuilder setLocalRepositoryManager(LocalRepositoryManager localRepositoryManager);
213
214 /**
215 * Sets the workspace reader used during this session. If set, the workspace reader will usually be consulted first
216 * to resolve artifacts.
217 *
218 * @param workspaceReader The workspace reader for this session, may be {@code null} if none.
219 * @return This session for chaining, never {@code null}.
220 */
221 SessionBuilder setWorkspaceReader(WorkspaceReader workspaceReader);
222
223 /**
224 * Sets the listener being notified of actions in the repository system.
225 *
226 * @param repositoryListener The repository listener, may be {@code null} if none.
227 * @return This session for chaining, never {@code null}.
228 */
229 SessionBuilder setRepositoryListener(RepositoryListener repositoryListener);
230
231 /**
232 * Sets the listener being notified of uploads/downloads by the repository system.
233 *
234 * @param transferListener The transfer listener, may be {@code null} if none.
235 * @return This session for chaining, never {@code null}.
236 */
237 SessionBuilder setTransferListener(TransferListener transferListener);
238
239 /**
240 * Sets the system properties to use, e.g. for processing of artifact descriptors. System properties are usually
241 * collected from the runtime environment like {@link System#getProperties()} and environment variables.
242 * <p>
243 * <em>Note:</em> System properties are of type {@code Map<String, String>} and any key-value pair in the input map
244 * that doesn't match this type will be silently ignored.
245 *
246 * @param systemProperties The system properties, may be {@code null} or empty if none.
247 * @return This session for chaining, never {@code null}.
248 */
249 SessionBuilder setSystemProperties(Map<?, ?> systemProperties);
250
251 /**
252 * Sets the specified system property.
253 *
254 * @param key The property key, must not be {@code null}.
255 * @param value The property value, may be {@code null} to remove/unset the property.
256 * @return This session for chaining, never {@code null}.
257 */
258 SessionBuilder setSystemProperty(String key, String value);
259
260 /**
261 * Sets the user properties to use, e.g. for processing of artifact descriptors. User properties are similar to
262 * system properties but are set on the discretion of the user and hence are considered of higher priority than
263 * system properties in case of conflicts.
264 * <p>
265 * <em>Note:</em> User properties are of type {@code Map<String, String>} and any key-value pair in the input map
266 * that doesn't match this type will be silently ignored.
267 *
268 * @param userProperties The user properties, may be {@code null} or empty if none.
269 * @return This session for chaining, never {@code null}.
270 */
271 SessionBuilder setUserProperties(Map<?, ?> userProperties);
272
273 /**
274 * Sets the specified user property.
275 *
276 * @param key The property key, must not be {@code null}.
277 * @param value The property value, may be {@code null} to remove/unset the property.
278 * @return This session for chaining, never {@code null}.
279 */
280 SessionBuilder setUserProperty(String key, String value);
281
282 /**
283 * Sets the configuration properties used to tweak internal aspects of the repository system (e.g. thread pooling,
284 * connector-specific behavior, etc.).
285 * <p>
286 * <em>Note:</em> Configuration properties are of type {@code Map<String, Object>} and any key-value pair in the
287 * input map that doesn't match this type will be silently ignored.
288 *
289 * @param configProperties The configuration properties, may be {@code null} or empty if none.
290 * @return This session for chaining, never {@code null}.
291 */
292 SessionBuilder setConfigProperties(Map<?, ?> configProperties);
293
294 /**
295 * Sets the specified configuration property.
296 *
297 * @param key The property key, must not be {@code null}.
298 * @param value The property value, may be {@code null} to remove/unset the property.
299 * @return This session for chaining, never {@code null}.
300 */
301 SessionBuilder setConfigProperty(String key, Object value);
302
303 /**
304 * Sets the mirror selector to use for repositories discovered in artifact descriptors. Note that this selector is
305 * not used for remote repositories which are passed as request parameters to the repository system, those
306 * repositories are supposed to denote the effective repositories.
307 *
308 * @param mirrorSelector The mirror selector to use, may be {@code null}.
309 * @return This session for chaining, never {@code null}.
310 */
311 SessionBuilder setMirrorSelector(MirrorSelector mirrorSelector);
312
313 /**
314 * Sets the proxy selector to use for repositories discovered in artifact descriptors. Note that this selector is
315 * not used for remote repositories which are passed as request parameters to the repository system, those
316 * repositories are supposed to have their proxy (if any) already set.
317 *
318 * @param proxySelector The proxy selector to use, may be {@code null}.
319 * @return This session for chaining, never {@code null}.
320 * @see RemoteRepository#getProxy()
321 */
322 SessionBuilder setProxySelector(ProxySelector proxySelector);
323
324 /**
325 * Sets the authentication selector to use for repositories discovered in artifact descriptors. Note that this
326 * selector is not used for remote repositories which are passed as request parameters to the repository system,
327 * those repositories are supposed to have their authentication (if any) already set.
328 *
329 * @param authenticationSelector The authentication selector to use, may be {@code null}.
330 * @return This session for chaining, never {@code null}.
331 * @see RemoteRepository#getAuthentication()
332 */
333 SessionBuilder setAuthenticationSelector(AuthenticationSelector authenticationSelector);
334
335 /**
336 * Sets the registry of artifact types recognized by this session.
337 *
338 * @param artifactTypeRegistry The artifact type registry, may be {@code null}.
339 * @return This session for chaining, never {@code null}.
340 */
341 SessionBuilder setArtifactTypeRegistry(ArtifactTypeRegistry artifactTypeRegistry);
342
343 /**
344 * Sets the dependency traverser to use for building dependency graphs.
345 *
346 * @param dependencyTraverser The dependency traverser to use for building dependency graphs, may be {@code null}.
347 * @return This session for chaining, never {@code null}.
348 */
349 SessionBuilder setDependencyTraverser(DependencyTraverser dependencyTraverser);
350
351 /**
352 * Sets the dependency manager to use for building dependency graphs.
353 *
354 * @param dependencyManager The dependency manager to use for building dependency graphs, may be {@code null}.
355 * @return This session for chaining, never {@code null}.
356 */
357 SessionBuilder setDependencyManager(DependencyManager dependencyManager);
358
359 /**
360 * Sets the dependency selector to use for building dependency graphs.
361 *
362 * @param dependencySelector The dependency selector to use for building dependency graphs, may be {@code null}.
363 * @return This session for chaining, never {@code null}.
364 */
365 SessionBuilder setDependencySelector(DependencySelector dependencySelector);
366
367 /**
368 * Sets the version filter to use for building dependency graphs.
369 *
370 * @param versionFilter The version filter to use for building dependency graphs, may be {@code null} to not filter
371 * versions.
372 * @return This session for chaining, never {@code null}.
373 */
374 SessionBuilder setVersionFilter(VersionFilter versionFilter);
375
376 /**
377 * Sets the dependency graph transformer to use for building dependency graphs.
378 *
379 * @param dependencyGraphTransformer The dependency graph transformer to use for building dependency graphs, may be
380 * {@code null}.
381 * @return This session for chaining, never {@code null}.
382 */
383 SessionBuilder setDependencyGraphTransformer(DependencyGraphTransformer dependencyGraphTransformer);
384
385 /**
386 * Sets the custom data associated with this session.
387 *
388 * @param data The session data, may be {@code null}.
389 * @return This session for chaining, never {@code null}.
390 */
391 SessionBuilder setData(SessionData data);
392
393 /**
394 * Sets the custom session data supplier associated with this session.
395 *
396 * @param dataSupplier The session data supplier, may not be {@code null}.
397 * @return This session for chaining, never {@code null}.
398 */
399 SessionBuilder setSessionDataSupplier(Supplier<SessionData> dataSupplier);
400
401 /**
402 * Sets the cache the repository system may use to save data for future reuse during the session.
403 *
404 * @param cache The repository cache, may be {@code null} if none.
405 * @return This session for chaining, never {@code null}.
406 */
407 SessionBuilder setCache(RepositoryCache cache);
408
409 /**
410 * Sets the cache supplier for the repository system may use to save data for future reuse during the session.
411 *
412 * @param cacheSupplier The repository cache supplier, may not be {@code null}.
413 * @return This session for chaining, never {@code null}.
414 */
415 SessionBuilder setRepositoryCacheSupplier(Supplier<RepositoryCache> cacheSupplier);
416
417 /**
418 * Shortcut method to set up local repository manager directly onto builder. There must be at least one non-null
419 * {@link File} passed in this method. In case multiple files, session builder will use chained local repository
420 * manager.
421 *
422 * @param baseDirectories The local repository base directories.
423 * @return This session for chaining, never {@code null}.
424 * @see #withLocalRepositories(LocalRepository...)
425 */
426 SessionBuilder withLocalRepositoryBaseDirectories(File... baseDirectories);
427
428 /**
429 * Shortcut method to set up local repository manager directly onto builder. There must be at least one non-null
430 * {@link File} present in passed in list. In case multiple files, session builder will use chained local
431 * repository manager.
432 *
433 * @param baseDirectories The local repository base directories.
434 * @return This session for chaining, never {@code null}.
435 * @see #withLocalRepositories(List)
436 */
437 SessionBuilder withLocalRepositoryBaseDirectories(List<File> baseDirectories);
438
439 /**
440 * Shortcut method to set up local repository manager directly onto builder. There must be at least one non-null
441 * {@link LocalRepository} passed in this method. In case multiple local repositories, session builder will
442 * use chained local repository manager.
443 *
444 * @param localRepositories The local repositories.
445 * @return This session for chaining, never {@code null}.
446 */
447 SessionBuilder withLocalRepositories(LocalRepository... localRepositories);
448
449 /**
450 * Shortcut method to set up local repository manager directly onto builder. There must be at least one non-null
451 * {@link LocalRepository} present in passed in list. In case multiple local repositories, session builder will
452 * use chained local repository manager.
453 *
454 * @param localRepositories The local repositories.
455 * @return This session for chaining, never {@code null}.
456 */
457 SessionBuilder withLocalRepositories(List<LocalRepository> localRepositories);
458
459 /**
460 * Shortcut method to shallow-copy passed in session into current builder.
461 *
462 * @param session The session to shallow-copy from.
463 * @return This session for chaining, never {@code null}.
464 */
465 SessionBuilder withRepositorySystemSession(RepositorySystemSession session);
466
467 /**
468 * Creates a session instance.
469 */
470 CloseableSession build();
471 }
472
473 /**
474 * Indicates whether the repository system operates in offline mode and avoids/refuses any access to remote
475 * repositories.
476 *
477 * @return {@code true} if the repository system is in offline mode, {@code false} otherwise.
478 */
479 boolean isOffline();
480
481 /**
482 * Indicates whether repositories declared in artifact descriptors should be ignored during transitive dependency
483 * collection. If enabled, only the repositories originally provided with the collect request will be considered.
484 *
485 * @return {@code true} if additional repositories from artifact descriptors are ignored, {@code false} to merge
486 * those with the originally specified repositories.
487 */
488 boolean isIgnoreArtifactDescriptorRepositories();
489
490 /**
491 * Gets the policy which controls whether resolutions errors from remote repositories should be cached.
492 *
493 * @return The resolution error policy for this session or {@code null} if resolution errors should generally not be
494 * cached.
495 */
496 ResolutionErrorPolicy getResolutionErrorPolicy();
497
498 /**
499 * Gets the policy which controls how errors related to reading artifact descriptors should be handled.
500 *
501 * @return The descriptor error policy for this session or {@code null} if descriptor errors should generally not be
502 * tolerated.
503 */
504 ArtifactDescriptorPolicy getArtifactDescriptorPolicy();
505
506 /**
507 * Gets the global checksum policy. If set, the global checksum policy overrides the checksum policies of the remote
508 * repositories being used for resolution.
509 *
510 * @return The global checksum policy or {@code null}/empty if not set and the per-repository policies apply.
511 * @see RepositoryPolicy#CHECKSUM_POLICY_FAIL
512 * @see RepositoryPolicy#CHECKSUM_POLICY_IGNORE
513 * @see RepositoryPolicy#CHECKSUM_POLICY_WARN
514 */
515 String getChecksumPolicy();
516
517 /**
518 * Gets the global update policy, or {@code null} if not set.
519 * <p>
520 * This method is meant for code that does not want to distinguish between artifact and metadata policies.
521 * Note: applications should either use get/set updatePolicy (this method and
522 * {@link DefaultRepositorySystemSession#setUpdatePolicy(String)}) or also distinguish between artifact and
523 * metadata update policies (and use other methods), but <em>should not mix the two!</em>
524 *
525 * @see #getArtifactUpdatePolicy()
526 * @see #getMetadataUpdatePolicy()
527 */
528 String getUpdatePolicy();
529
530 /**
531 * Gets the global artifact update policy. If set, the global update policy overrides the update policies of the
532 * remote repositories being used for resolution.
533 *
534 * @return The global update policy or {@code null}/empty if not set and the per-repository policies apply.
535 * @see RepositoryPolicy#UPDATE_POLICY_ALWAYS
536 * @see RepositoryPolicy#UPDATE_POLICY_DAILY
537 * @see RepositoryPolicy#UPDATE_POLICY_NEVER
538 * @since 2.0.0
539 */
540 String getArtifactUpdatePolicy();
541
542 /**
543 * Gets the global metadata update policy. If set, the global update policy overrides the update policies of the remote
544 * repositories being used for resolution.
545 *
546 * @return The global update policy or {@code null}/empty if not set and the per-repository policies apply.
547 * @see RepositoryPolicy#UPDATE_POLICY_ALWAYS
548 * @see RepositoryPolicy#UPDATE_POLICY_DAILY
549 * @see RepositoryPolicy#UPDATE_POLICY_NEVER
550 * @since 2.0.0
551 */
552 String getMetadataUpdatePolicy();
553
554 /**
555 * Gets the local repository used during this session. This is a convenience method for
556 * {@link LocalRepositoryManager#getRepository()}.
557 *
558 * @return The local repository being during this session, never {@code null}.
559 */
560 LocalRepository getLocalRepository();
561
562 /**
563 * Gets the local repository manager used during this session.
564 *
565 * @return The local repository manager used during this session, never {@code null}.
566 */
567 LocalRepositoryManager getLocalRepositoryManager();
568
569 /**
570 * Gets the workspace reader used during this session. If set, the workspace reader will usually be consulted first
571 * to resolve artifacts.
572 *
573 * @return The workspace reader for this session or {@code null} if none.
574 */
575 WorkspaceReader getWorkspaceReader();
576
577 /**
578 * Gets the listener being notified of actions in the repository system.
579 *
580 * @return The repository listener or {@code null} if none.
581 */
582 RepositoryListener getRepositoryListener();
583
584 /**
585 * Gets the listener being notified of uploads/downloads by the repository system.
586 *
587 * @return The transfer listener or {@code null} if none.
588 */
589 TransferListener getTransferListener();
590
591 /**
592 * Gets the system properties to use, e.g. for processing of artifact descriptors. System properties are usually
593 * collected from the runtime environment like {@link System#getProperties()} and environment variables.
594 *
595 * @return The (read-only) system properties, never {@code null}.
596 */
597 Map<String, String> getSystemProperties();
598
599 /**
600 * Gets the user properties to use, e.g. for processing of artifact descriptors. User properties are similar to
601 * system properties but are set on the discretion of the user and hence are considered of higher priority than
602 * system properties.
603 *
604 * @return The (read-only) user properties, never {@code null}.
605 */
606 Map<String, String> getUserProperties();
607
608 /**
609 * Gets the configuration properties used to tweak internal aspects of the repository system (e.g. thread pooling,
610 * connector-specific behavior, etc.)
611 *
612 * @return The (read-only) configuration properties, never {@code null}.
613 * @see ConfigurationProperties
614 */
615 Map<String, Object> getConfigProperties();
616
617 /**
618 * Gets the mirror selector to use for repositories discovered in artifact descriptors. Note that this selector is
619 * not used for remote repositories which are passed as request parameters to the repository system, those
620 * repositories are supposed to denote the effective repositories.
621 *
622 * @return The mirror selector to use, never {@code null}.
623 * @see RepositorySystem#newResolutionRepositories(RepositorySystemSession, java.util.List)
624 */
625 MirrorSelector getMirrorSelector();
626
627 /**
628 * Gets the proxy selector to use for repositories discovered in artifact descriptors. Note that this selector is
629 * not used for remote repositories which are passed as request parameters to the repository system, those
630 * repositories are supposed to have their proxy (if any) already set.
631 *
632 * @return The proxy selector to use, never {@code null}.
633 * @see org.eclipse.aether.repository.RemoteRepository#getProxy()
634 * @see RepositorySystem#newResolutionRepositories(RepositorySystemSession, java.util.List)
635 */
636 ProxySelector getProxySelector();
637
638 /**
639 * Gets the authentication selector to use for repositories discovered in artifact descriptors. Note that this
640 * selector is not used for remote repositories which are passed as request parameters to the repository system,
641 * those repositories are supposed to have their authentication (if any) already set.
642 *
643 * @return The authentication selector to use, never {@code null}.
644 * @see org.eclipse.aether.repository.RemoteRepository#getAuthentication()
645 * @see RepositorySystem#newResolutionRepositories(RepositorySystemSession, java.util.List)
646 */
647 AuthenticationSelector getAuthenticationSelector();
648
649 /**
650 * Gets the registry of artifact types recognized by this session, for instance when processing artifact
651 * descriptors.
652 *
653 * @return The artifact type registry, never {@code null}.
654 */
655 ArtifactTypeRegistry getArtifactTypeRegistry();
656
657 /**
658 * Gets the dependency traverser to use for building dependency graphs.
659 *
660 * @return The dependency traverser to use for building dependency graphs or {@code null} if dependencies are
661 * unconditionally traversed.
662 */
663 DependencyTraverser getDependencyTraverser();
664
665 /**
666 * Gets the dependency manager to use for building dependency graphs.
667 *
668 * @return The dependency manager to use for building dependency graphs or {@code null} if dependency management is
669 * not performed.
670 */
671 DependencyManager getDependencyManager();
672
673 /**
674 * Gets the dependency selector to use for building dependency graphs.
675 *
676 * @return The dependency selector to use for building dependency graphs or {@code null} if dependencies are
677 * unconditionally included.
678 */
679 DependencySelector getDependencySelector();
680
681 /**
682 * Gets the version filter to use for building dependency graphs.
683 *
684 * @return The version filter to use for building dependency graphs or {@code null} if versions aren't filtered.
685 */
686 VersionFilter getVersionFilter();
687
688 /**
689 * Gets the dependency graph transformer to use for building dependency graphs.
690 *
691 * @return The dependency graph transformer to use for building dependency graphs or {@code null} if none.
692 */
693 DependencyGraphTransformer getDependencyGraphTransformer();
694
695 /**
696 * Gets the custom data associated with this session.
697 *
698 * @return The session data, never {@code null}.
699 */
700 SessionData getData();
701
702 /**
703 * Gets the cache the repository system may use to save data for future reuse during the session.
704 *
705 * @return The repository cache or {@code null} if none.
706 */
707 RepositoryCache getCache();
708
709 /**
710 * Registers a handler to execute when this session closed.
711 * <p>
712 * Note: Resolver 1.x sessions will not be able to register handlers. Migrate to Resolver 2.x way of handling
713 * sessions to make full use of new features. New features (like HTTP/2 transport) depend on this functionality.
714 * While they will function with Resolver 1.x sessions, they may produce resource leaks.
715 *
716 * @param handler the handler, never {@code null}.
717 * @return {@code true} if handler successfully registered, {@code false} otherwise.
718 * @since 2.0.0
719 */
720 boolean addOnSessionEndedHandler(Runnable handler);
721 }