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Posted to commits@jackrabbit.apache.org by Apache Wiki <wi...@apache.org> on 2008/12/14 16:50:05 UTC
[Jackrabbit Wiki] Update of "QuestionsAndAnswers" by AlexanderKlimetschek
Dear Wiki user,
You have subscribed to a wiki page or wiki category on "Jackrabbit Wiki" for change notification.
The following page has been changed by AlexanderKlimetschek:
http://wiki.apache.org/jackrabbit/QuestionsAndAnswers
The comment on the change is:
no longer invite for questions here but redirect to the mailing lists instead
------------------------------------------------------------------------------
== Apache Jackrabbit Questions and Answers ==
+ There is an [http://jackrabbit.apache.org/faq.html official Jackrabbit FAQ] on the main Jackrabbit website.
- This page is an alternative to the [http://incubator.apache.org/jackrabbit/mail-lists.html Jackrabbit mailing lists] for people who prefer using a web forum instead of a mailing list for asking questions.
- Please feel free to add any Jackrabbit questions or answers here. The best questions will be incorporated into our website documentation as the [http://jackrabbit.apache.org/faq.html Jackrabbit FAQ].
+ Please ask questions on the [http://incubator.apache.org/jackrabbit/mail-lists.html Jackrabbit mailing lists]. There is the users list for questions around using JCR and Jackrabbit and the dev list for the development of Jackrabbit itself and for people starting to extend Jackrabbit or other advanced topics.
+ Here are some mailing list archives for easy searching of existing mails (which contain a lot of knowledge around JCR and Jackrabbit):
- ----
- === Where the "ObjectPersistenceManager" save file? ===
- Question:
- I use "org.apache.jackrabbit.core.state.obj.ObjectPersistenceManager" for the PersistenceManager.I create a node, then upload a file.after that i also success get the file.but i want know where "ObjectPersistenceManager" save the file.i can't find it in my file system.En,my system is windows.
+ * http://www.nabble.com/Jackrabbit-f361.html (also allows to post easily using a nabble account instead of subscribing to the lists directly)
+ * http://jackrabbit.markmail.org/ (nice user interface)
+ * http://dev.day.com/discussion-groups/lists.html (search also across the Apache Sling list and Day's commercial repository CRX)
-
- === Why no node SPI? ===
-
- Question:
- I read in the FAQ that the interface was not intended to provide a SPI for attaching to other storage. Specifically, it says that you could probably achieve this for a read-only link to an existing relational database table, but it says you shouldn't/couldn't do it for read/write relational data.
-
- I am curious why this closed architecture? I am considering this for a major project bt need the ability to map to relational schemas and other existing content stores, including other document management systems, and could even envision using that mechanism to federate multiple Jackrabit repositories into a central repository. I thought I might just need to extend VersionImpl or one of the other Node types and override some of the methods.
-
- I would even envision implementing node types that map to transient runtime data such as performance counters etc.
-
- Can you elaborate as to what architectural/design issues make this not possible. Or, is it just a philosophical point of view or ? This is one of the powerful capabilities that Slide offers. I understand that putting this abstraction over the RDBMS would have performance issues, but assuming my use case isn't sensitive to that, what are the reasons it won't work?
-
- Thank you very much.
-
-
- === Where can I find examples of using the JCR API? ===
-
- Answer:
- Please check the following:
-
- * The [http://jackrabbit.apache.org/doc/firststeps.html First Hops] document
- * The ExamplesPage
-
- If you have ideas of good examples you'd like to see, please submit your ideas as [http://issues.apache.org/jira/browse/JCR Jackrabbit enhancements]!
-
-
- === Is there a way to use Jackrabbit without access control, or to get it working without changing JVM properties? ===
-
- I'm using/evaluating Apache Jackrabbit for an open source project (platypuswiki.sf.net).
- My application is distributable as a War file (java webapp standard format).
- My problem is related to the Jackrabbit authentication. I see, from your examples, the need of the jaas.config definition. I'd like that my users do not have to change its tomcat/jetty jvm configuration settings: -Djava.security.auth.login.config= blah blah/jaas.config.
-
- '''Answer:''' The JAAS configuration is no longer required for simple deployments. Starting from Apache Jackrabbit version 1.0 you do not need to set the JAAS login configuration options unless you want to override the default settings. See [http://issues.apache.org/jira/browse/JCR-351 JCR-351] for the background and resolution of this issue.
-
- '''Question:'''
- Thank you for the response.
- I have understood, that I have to use "TransientRepository" in place of "Repository" for omit the JAAS configuration. Is it true ?
-
- What are others differences (advantages/disavantages) of using "TransientRepository" in place of "Repository" implmentation ?
- --------
-
- == Supported operations ==
- '''Questions:'''
-
- 1. I have saw that NamespaceRegistry.unregisterNamespace(..) is not supported. Is this feature planned in next releases ? Or there are other ways to change a namespace URI of a registered namespace ?
-
- Answer: See this mail: http://article.gmane.org/gmane.comp.apache.jackrabbit.devel/6836
-
- 2. Also, I have saw that the Xpath function "contains" is not supported: '''javax.jcr.query.InvalidQueryException: Unsupported function: contains'''.
- There is a way for searching (full-text keyword search) into a value of a named property over all the workspace ?
-
- ''Solved''
- We need to use jcr:contains() function
-
- There is a way for accessing, bypassing JCR pure std api, at lucene Index ?
-
- == How do I use Jackrabbit in MY projects with Maven 2 ? ==
- If you are using maven 2, happily the releases of Jackrabbit are kept in the central maven repo.
- Put the following into your projects pom.xml:
- {{{
- <dependency>
- <groupId>org.apache.jackrabbit</groupId>
- <artifactId>jackrabbit-core</artifactId>
- <version>1.3.3</version>
- </dependency>
- }}}
- As Jackrabbit depends on JCR (of course) you will also need to add:
- {{{
- <dependency>
- <groupId>javax.jcr</groupId>
- <artifactId>jcr</artifactId>
- <version>1.0</version>
- </dependency>
- }}}
-
- == Syntax errors in CND files ==
- If you get annoying errors like: "Missing ']' delimiter for end of node type name", the chances are you are using names that have underscores in them ! (cryptic, I know). Remove the underscores and you are good to go !
-
-
-
- '''Poor Performance when Implementing Global Revisioning & Content Set'''
-
- We are in the process of evaluating Jackrabbit as a content repository for our internal content storage system. The content stored are all XML documents that are stored as a property in the node. The repository stores versioned/non-versioned nodes and typically nodes under certain root nodes are all revisioned. We are implementing full versioning capabilities similar to Subversion so that every commit results in a changeset node being created which refers to all the changed documents during this operation also we have to create a global revision so that a user can retrieve the repository state at a particular point in time. So we have implemented a tree walking which walks the tree and put the global revision reference to all the nodes in the repository. So our repository looks like the following:
-
- root
- - Root1
- - Root2
- changeset Root
- - cs1
- - cs2
- Global Revision Root
- - global revision 1
- - global revision 2
-
- Each cs1 is referencable and contains a property of type reference pointing to global revision. Each global revision is also. referencable. Each Root1 has two referencable properties pointing to cs-x and global revision x. The performance is really bad it takes 10 minutes for a repository with 100 documents.
-
- Have anybody tried implementing the concept of global revision & Change Set in Content Repository???
- Any Suggestions???
-
- == JAR Files that Work with JackRabbit V1.3.3 ==
-
- First Hops Hop 0: Getting started is outdated when using JackRabbit 1.3.3. In particular you need to use lucene-core-1.9-final.jar rather than lucene-1.4.3.jar. Also, the latest logging subsystems work fine: log4j-api-1.4.3.jar, slf4j-log4j12-1.4.3.jar, log4j-1.2.15.jar, slf4j-api-1.4.3,jar.
-
- ----
-
- == Bugs & Known Limitations ==
- === IllegalStateException: unread block data ===
-
- Question: sometimes is thrown an exception in obtaining the stream to the Object stored in Jackrabbit:
-
- java.lang.IllegalStateException: unread block data
- at java.io.ObjectInputStream$BlockDataInputStream.setBlockDataMode(ObjectInputStream.java:2375)
- at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1361)
- at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1945)
- at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1869)
- at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
- at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
- at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
- at sun.rmi.server.UnicastRef.unmarshalValue(UnicastRef.java:306)
- at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:155)
- at org.apache.jackrabbit.rmi.server.ServerProperty_Stub.getValue(Unknown Source)
- at org.apache.jackrabbit.rmi.client.ClientProperty.getValue(ClientProperty.java:137)
- at org.apache.jackrabbit.rmi.client.ClientProperty.getStream(ClientProperty.java:121)
-
- This happens using version 1.3.3, in unpredictable manner. Is it a bug or a feature? Any suggestion would be useful.
-
-
- === Extractor dependency not found ===
-
- Question: I'm a new Jackrabbit user. When I run the "FirstHop.java" from "http://jackrabbit.apache.org/first-hops.html", I get the following warnings (whole log posted; the person answering should feel free to edit down to the most important lines.)
-
- {{{
- 496 [main] INFO org.apache.jackrabbit.core.RepositoryImpl - Starting repository...
- 578 [main] INFO org.apache.jackrabbit.core.fs.local.LocalFileSystem - LocalFileSystem initialized at path repository/repository
- 1218 [main] INFO org.apache.jackrabbit.core.nodetype.NodeTypeRegistry - no custom node type definitions found
- 1236 [main] INFO org.apache.jackrabbit.core.fs.local.LocalFileSystem - LocalFileSystem initialized at path repository/version
- 2945 [main] INFO org.apache.jackrabbit.core.persistence.bundle.util.ConnectionRecoveryManager - Database: Apache Derby / 10.3.2.1 - (599110)
- 2945 [main] INFO org.apache.jackrabbit.core.persistence.bundle.util.ConnectionRecoveryManager - Driver: Apache Derby Embedded JDBC Driver / 10.3.2.1 - (599110)
- 4607 [main] INFO org.apache.jackrabbit.core.RepositoryImpl - initializing workspace 'default'...
- 4609 [main] INFO org.apache.jackrabbit.core.fs.local.LocalFileSystem - LocalFileSystem initialized at path repository/workspaces/default
- 4716 [main] INFO org.apache.jackrabbit.core.persistence.bundle.util.ConnectionRecoveryManager - Database: Apache Derby / 10.3.2.1 - (599110)
- 4716 [main] INFO org.apache.jackrabbit.core.persistence.bundle.util.ConnectionRecoveryManager - Driver: Apache Derby Embedded JDBC Driver / 10.3.2.1 - (599110)
- 5515 [main] INFO org.apache.jackrabbit.core.RepositoryImpl - workspace 'default' initialized
- 5860 [main] WARN org.apache.jackrabbit.core.query.lucene.JackrabbitTextExtractor - Extractor dependency not found: org.apache.jackrabbit.extractor.MsWordTextExtractor
- java.lang.NoClassDefFoundError
- at org.apache.jackrabbit.extractor.MsWordTextExtractor.class$(MsWordTextExtractor.java:37)
- at org.apache.jackrabbit.extractor.MsWordTextExtractor.<clinit>(MsWordTextExtractor.java:43)
- at java.lang.Class.forName0(Native Method)
- at java.lang.Class.forName(Class.java:164)
- at org.apache.jackrabbit.core.query.lucene.JackrabbitTextExtractor.<init>(JackrabbitTextExtractor.java:113)
- at org.apache.jackrabbit.core.query.lucene.SearchIndex.createTextExtractor(SearchIndex.java:881)
- at org.apache.jackrabbit.core.query.lucene.SearchIndex.doInit(SearchIndex.java:395)
- at org.apache.jackrabbit.core.query.AbstractQueryHandler.init(AbstractQueryHandler.java:48)
- at org.apache.jackrabbit.core.SearchManager.initializeQueryHandler(SearchManager.java:573)
- at org.apache.jackrabbit.core.SearchManager.<init>(SearchManager.java:255)
- at org.apache.jackrabbit.core.RepositoryImpl.getSystemSearchManager(RepositoryImpl.java:625)
- at org.apache.jackrabbit.core.RepositoryImpl.access$300(RepositoryImpl.java:104)
- at org.apache.jackrabbit.core.RepositoryImpl$WorkspaceInfo.getSearchManager(RepositoryImpl.java:1613)
- at org.apache.jackrabbit.core.RepositoryImpl.initWorkspace(RepositoryImpl.java:606)
- at org.apache.jackrabbit.core.RepositoryImpl.initStartupWorkspaces(RepositoryImpl.java:415)
- at org.apache.jackrabbit.core.RepositoryImpl.<init>(RepositoryImpl.java:305)
- at org.apache.jackrabbit.core.RepositoryImpl.create(RepositoryImpl.java:557)
- at org.apache.jackrabbit.core.TransientRepository$2.getRepository(TransientRepository.java:245)
- at org.apache.jackrabbit.core.TransientRepository.startRepository(TransientRepository.java:265)
- at org.apache.jackrabbit.core.TransientRepository.login(TransientRepository.java:333)
- at org.apache.jackrabbit.core.TransientRepository.login(TransientRepository.java:388)
- at org.lockss.jackrabbit.FirstHop.main(FirstHop.java:26)
- Caused by: java.lang.ClassNotFoundException: org.textmining.text.extraction.WordExtractor
- at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
- at java.security.AccessController.doPrivileged(Native Method)
- at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
- at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
- at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
- at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
- at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
- at java.lang.Class.forName0(Native Method)
- at java.lang.Class.forName(Class.java:164)
- ... 22 more
- 5913 [main] WARN org.apache.jackrabbit.core.query.lucene.JackrabbitTextExtractor - Extractor dependency not found: org.apache.jackrabbit.extractor.PdfTextExtractor
- java.lang.NoClassDefFoundError: org/pdfbox/pdmodel/PDDocument
- at java.lang.Class.forName0(Native Method)
- at java.lang.Class.forName(Class.java:164)
- at org.apache.jackrabbit.core.query.lucene.JackrabbitTextExtractor.<init>(JackrabbitTextExtractor.java:113)
- at org.apache.jackrabbit.core.query.lucene.SearchIndex.createTextExtractor(SearchIndex.java:881)
- at org.apache.jackrabbit.core.query.lucene.SearchIndex.doInit(SearchIndex.java:395)
- at org.apache.jackrabbit.core.query.AbstractQueryHandler.init(AbstractQueryHandler.java:48)
- at org.apache.jackrabbit.core.SearchManager.initializeQueryHandler(SearchManager.java:573)
- at org.apache.jackrabbit.core.SearchManager.<init>(SearchManager.java:255)
- at org.apache.jackrabbit.core.RepositoryImpl.getSystemSearchManager(RepositoryImpl.java:625)
- at org.apache.jackrabbit.core.RepositoryImpl.access$300(RepositoryImpl.java:104)
- at org.apache.jackrabbit.core.RepositoryImpl$WorkspaceInfo.getSearchManager(RepositoryImpl.java:1613)
- at org.apache.jackrabbit.core.RepositoryImpl.initWorkspace(RepositoryImpl.java:606)
- at org.apache.jackrabbit.core.RepositoryImpl.initStartupWorkspaces(RepositoryImpl.java:415)
- at org.apache.jackrabbit.core.RepositoryImpl.<init>(RepositoryImpl.java:305)
- at org.apache.jackrabbit.core.RepositoryImpl.create(RepositoryImpl.java:557)
- at org.apache.jackrabbit.core.TransientRepository$2.getRepository(TransientRepository.java:245)
- at org.apache.jackrabbit.core.TransientRepository.startRepository(TransientRepository.java:265)
- at org.apache.jackrabbit.core.TransientRepository.login(TransientRepository.java:333)
- at org.apache.jackrabbit.core.TransientRepository.login(TransientRepository.java:388)
- at org.lockss.jackrabbit.FirstHop.main(FirstHop.java:26)
- 6063 [main] INFO org.apache.jackrabbit.core.fs.local.LocalFileSystem - LocalFileSystem initialized at path repository/repository/index
- 6422 [main] INFO org.apache.jackrabbit.core.query.lucene.SearchIndex - Index initialized: repository/repository/index Version: 2
- 6429 [main] WARN org.apache.jackrabbit.core.query.lucene.JackrabbitTextExtractor - Extractor dependency not found: org.apache.jackrabbit.extractor.MsWordTextExtractor
- java.lang.NoClassDefFoundError
- at java.lang.Class.forName0(Native Method)
- at java.lang.Class.forName(Class.java:164)
- at org.apache.jackrabbit.core.query.lucene.JackrabbitTextExtractor.<init>(JackrabbitTextExtractor.java:113)
- at org.apache.jackrabbit.core.query.lucene.SearchIndex.createTextExtractor(SearchIndex.java:881)
- at org.apache.jackrabbit.core.query.lucene.SearchIndex.doInit(SearchIndex.java:395)
- at org.apache.jackrabbit.core.query.AbstractQueryHandler.init(AbstractQueryHandler.java:48)
- at org.apache.jackrabbit.core.SearchManager.initializeQueryHandler(SearchManager.java:573)
- at org.apache.jackrabbit.core.SearchManager.<init>(SearchManager.java:255)
- at org.apache.jackrabbit.core.RepositoryImpl$WorkspaceInfo.getSearchManager(RepositoryImpl.java:1613)
- at org.apache.jackrabbit.core.RepositoryImpl.initWorkspace(RepositoryImpl.java:606)
- at org.apache.jackrabbit.core.RepositoryImpl.initStartupWorkspaces(RepositoryImpl.java:415)
- at org.apache.jackrabbit.core.RepositoryImpl.<init>(RepositoryImpl.java:305)
- at org.apache.jackrabbit.core.RepositoryImpl.create(RepositoryImpl.java:557)
- at org.apache.jackrabbit.core.TransientRepository$2.getRepository(TransientRepository.java:245)
- at org.apache.jackrabbit.core.TransientRepository.startRepository(TransientRepository.java:265)
- at org.apache.jackrabbit.core.TransientRepository.login(TransientRepository.java:333)
- at org.apache.jackrabbit.core.TransientRepository.login(TransientRepository.java:388)
- at org.lockss.jackrabbit.FirstHop.main(FirstHop.java:26)
- 6438 [main] WARN org.apache.jackrabbit.core.query.lucene.JackrabbitTextExtractor - Extractor dependency not found: org.apache.jackrabbit.extractor.PdfTextExtractor
- java.lang.NoClassDefFoundError: org/pdfbox/pdmodel/PDDocument
- at java.lang.Class.forName0(Native Method)
- at java.lang.Class.forName(Class.java:164)
- at org.apache.jackrabbit.core.query.lucene.JackrabbitTextExtractor.<init>(JackrabbitTextExtractor.java:113)
- at org.apache.jackrabbit.core.query.lucene.SearchIndex.createTextExtractor(SearchIndex.java:881)
- at org.apache.jackrabbit.core.query.lucene.SearchIndex.doInit(SearchIndex.java:395)
- at org.apache.jackrabbit.core.query.AbstractQueryHandler.init(AbstractQueryHandler.java:48)
- at org.apache.jackrabbit.core.SearchManager.initializeQueryHandler(SearchManager.java:573)
- at org.apache.jackrabbit.core.SearchManager.<init>(SearchManager.java:255)
- at org.apache.jackrabbit.core.RepositoryImpl$WorkspaceInfo.getSearchManager(RepositoryImpl.java:1613)
- at org.apache.jackrabbit.core.RepositoryImpl.initWorkspace(RepositoryImpl.java:606)
- at org.apache.jackrabbit.core.RepositoryImpl.initStartupWorkspaces(RepositoryImpl.java:415)
- at org.apache.jackrabbit.core.RepositoryImpl.<init>(RepositoryImpl.java:305)
- at org.apache.jackrabbit.core.RepositoryImpl.create(RepositoryImpl.java:557)
- at org.apache.jackrabbit.core.TransientRepository$2.getRepository(TransientRepository.java:245)
- at org.apache.jackrabbit.core.TransientRepository.startRepository(TransientRepository.java:265)
- at org.apache.jackrabbit.core.TransientRepository.login(TransientRepository.java:333)
- at org.apache.jackrabbit.core.TransientRepository.login(TransientRepository.java:388)
- at org.lockss.jackrabbit.FirstHop.main(FirstHop.java:26)
- 6448 [main] INFO org.apache.jackrabbit.core.fs.local.LocalFileSystem - LocalFileSystem initialized at path repository/workspaces/default/index
- 6456 [main] INFO org.apache.jackrabbit.core.query.lucene.SearchIndex - Index initialized: repository/workspaces/default/index Version: 2
- 6456 [main] INFO org.apache.jackrabbit.core.RepositoryImpl - Repository started
- 6457 [main] INFO org.apache.jackrabbit.core.TransientRepository - Transient repository initialized
- 6532 [main] INFO org.apache.jackrabbit.core.TransientRepository - Session opened
- Logged in as anonymous to a Jackrabbit repository.
- 6550 [main] INFO org.apache.jackrabbit.core.TransientRepository - Session closed
- 6550 [main] INFO org.apache.jackrabbit.core.RepositoryImpl - Shutting down repository...
- 6553 [IndexMerger] INFO org.apache.jackrabbit.core.query.lucene.IndexMerger - IndexMerger terminated
- 6558 [main] INFO org.apache.jackrabbit.core.query.lucene.SearchIndex - Index closed: repository/repository/index
- 6558 [main] INFO org.apache.jackrabbit.core.RepositoryImpl - shutting down workspace 'default'...
- 6559 [main] INFO org.apache.jackrabbit.core.observation.ObservationDispatcher - Notification of EventListeners stopped.
- 6559 [IndexMerger] INFO org.apache.jackrabbit.core.query.lucene.IndexMerger - IndexMerger terminated
- 6606 [main] INFO org.apache.jackrabbit.core.query.lucene.SearchIndex - Index closed: repository/workspaces/default/index
- 6639 [main] INFO org.apache.jackrabbit.core.persistence.bundle.DerbyPersistenceManager - Database 'repository/workspaces/default/db' shutdown.
- 6643 [main] ERROR org.apache.jackrabbit.core.persistence.bundle.util.ConnectionRecoveryManager - failed to close connection, reason: No current connection., state/code: 08003/40000
- 6645 [main] INFO org.apache.jackrabbit.core.RepositoryImpl - workspace 'default' has been shutdown
- 6661 [main] INFO org.apache.jackrabbit.core.persistence.bundle.DerbyPersistenceManager - Database 'repository/version/db' shutdown.
- 6661 [main] ERROR org.apache.jackrabbit.core.persistence.bundle.util.ConnectionRecoveryManager - failed to close connection, reason: No current connection., state/code: 08003/40000
- 6678 [main] INFO org.apache.jackrabbit.core.RepositoryImpl - Repository has been shutdown
- 6678 [main] INFO org.apache.jackrabbit.core.TransientRepository - Transient repository shut down
- }}}
-
- I'm worried about the "Extractor Dependencies not found". What could be causing this?
-
-
- '''Answer:'''
- You have to include in your project the following libraries:
- * PDFBox-0.7.3.jar (See PDFBox project [http://www.pdfbox.org/])
- * poi-3.0.2-FINAL-20080204.jar (See POI project [http://poi.apache.org/])
- * tm-extractors-0.4.jar ([http://www.ibiblio.org/maven/org.textmining/jars/tm-extractors-0.4.jar]])
-
- ----
-
- '''Question:'''
- I am using Jackrabbit 1.4.5. I parsed a SQL query using QueryParser.parse() that contains a NOT BETWEEN. I then used QueryTreeDump to display the query tree. It shows RelationQueryNodes with >= and <= on the values I passed, as expected for a BETWEEN. However I would have thought the reverse would have happened since I specified NOT Between. Is this a bug?
-