Mark,
What we're doing, and what I've seen others do, is to archive the
streaming meta file, e.g. .ram or .asx, in DSpace. In our case, we're
using Helix. That file is just a reference to the media file located on
the streaming server and web browsers need the metafile anyway since
they can't resolve the "rtsp://" directly.
I'm just wondering if this won't work in your situation and if not,
why? We also intend to be dealing with more and more audio and video.
It would be nice to compile the possible use cases and which approaches
will work best across scenarios.
Jason
******************
Message: 3
Date: Wed, 21 Feb 2007 13:16:31 -0500
From: "Mark H. Wood" <[EMAIL PROTECTED]>
Subject: [Dspace-tech] Audio and video bitstreams
To: dspace-tech@lists.sourceforge.net
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"
We continue to get requests for support of audio and video. For
longer audio documents, and video of almost any length, the average
user isn't going to want to sit watching the thing download and his
storage fill up; he's going to expect streaming access that starts
almost immediately. This suggests that DSpace needs a way to specify
a "nonlocal" bitstream which is just a URL for such a service.
Yeah, we can dream up a metadata field and have it formatted as a
link. We're going to do that to start out with. But that's going to
be confusing to the end user, who will expect links to the content he
found to be all in the same place, and *especially* that the form he
most likely prefers will not be off in some unusual location on the
page. It would be much nicer if we could e.g. submit an item with two
bitstreams: a nonlocal one pointing to a streaming service for casual
use, and a local one through which the user can download and keep a
copy of the actual document.
Comments?
--
Mark H. Wood, Lead System Programmer [EMAIL PROTECTED]
Typically when a software vendor says that a product is "intuitive" he
means the exact opposite.
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Message: 4
Date: Wed, 21 Feb 2007 12:21:52 -0600
From: Tim Donohue <[EMAIL PROTECTED]>
Subject: Re: [Dspace-tech] Implementing OAI-PMH as a Data Provider
To: Brian Helstien <[EMAIL PROTECTED]>
Cc: dspace-tech@lists.sourceforge.net
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Brian,
The lines of direct importance that I can see from the last 100 is:
"java.lang.NullPointerException
at org.dspace.core.Utils.addEntities(Utils.java:261)"
This looks to be errorring out on this line in the "addEntities()"
method of Utils.java:
"value = value.replaceAll("&", "&");"
In particular, it's saying that something calling that method passed in
a null value as the "value" parameter. This is something that has
since
been fixed in DSpace 1.4.1 with the addition of these lines (just
before
the one above):
if (value==null || value.length() == 0)
return value;
So, it's *possible* that you can add that code into addEntities() and
it
may resolve the issue (or, even better upgrade to DSpace 1.4 and then
1.4.1, to have all the latest bug fixes). But, it's also *possible*
there's something more going on. It's hard to tell, since the last 100
lines of catalina.out didn't include the initial Java error (it started
with an "at" statement, which was just detailing the location of an
error in the "stack"). So I'm not sure if the "NullPointerException"
was
the result of something larger or not.
Hopefully that helps.
- Tim
Brian Helstien wrote:
> Tim,
> Here are the last 100 of catalina.out and my browser/tomcat
> response. In making 1.3.2 work with Oracle, we needed to change
> Item/History/Registration Data tables from Timestamp to Date. The
> ORA-01858 makes me think that I've another table attribute value
that
> needs to be modified, but ...what'a I know?
>
> bash-2.05b$ tail -100 catalina.out
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
> at
>
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
> a:39)
> at
>
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at
ORG.oclc.oai.server.OAIHandler.getResult(OAIHandler.java:306)
> at ORG.oclc.oai.server.OAIHandler.doGet(OAIHandler.java:225)
> at
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
> at
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
> tionFilterChain.java:252)
> at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
> erChain.java:173)
> at
>
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
> e.java:213)
> at
>
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
> e.java:178)
> at
>
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
> :126)
> at
>
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
> :105)
> at
>
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
> java:107)
> at
>
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:1
> 48)
> at
>
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:86
> 9)
> at
>
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.proc
> essConnection(Http11BaseProtocol.java:664)
> at
>
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint
> .java:527)
> at
>
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollow
> erWorkerThread.java:80)
> at
>
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool
> .java:684)
> at java.lang.Thread.run(Thread.java:595)
> java.lang.NullPointerException
> at org.dspace.core.Utils.addEntities(Utils.java:261)
> at
>
org.dspace.app.oai.DSpaceOAICatalog.listSets(DSpaceOAICatalog.java:660)
> at
> ORG.oclc.oai.server.verb.ListSets.construct(ListSets.java:107)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
> at
>
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
> a:39)
> at
>
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at
ORG.oclc.oai.server.OAIHandler.getResult(OAIHandler.java:306)
> at ORG.oclc.oai.server.OAIHandler.doGet(OAIHandler.java:225)
> at
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
> at
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
> tionFilterChain.java:252)
> at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
> erChain.java:173)
> at
>
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
> e.java:213)
> at
>
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
> e.java:178)
> at
>
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
> :126)
> at
>
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
> :105)
> at
>
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
> java:107)
> at
>
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:1
> 48)
> at
>
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:86
> 9)
> at
>
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.proc
> essConnection(Http11BaseProtocol.java:664)
> at
>
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint
> .java:527)
> at
>
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollow
> erWorkerThread.java:80)
> at
>
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool
> .java:684)
> at java.lang.Thread.run(Thread.java:595)
> java.lang.NullPointerException
> at org.dspace.core.Utils.addEntities(Utils.java:261)
> at
>
org.dspace.app.oai.DSpaceOAICatalog.listSets(DSpaceOAICatalog.java:660)
> at
> ORG.oclc.oai.server.verb.ListSets.construct(ListSets.java:107)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
> at
>
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
> a:39)
> at
>
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at
ORG.oclc.oai.server.OAIHandler.getResult(OAIHandler.java:306)
> at ORG.oclc.oai.server.OAIHandler.doGet(OAIHandler.java:225)
> at
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
> at
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
> tionFilterChain.java:252)
> at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
> erChain.java:173)
> at
>
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
> e.java:213)
> at
>
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
> e.java:178)
> at
>
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
> :126)
> at
>
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
> :105)
> at
>
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
> java:107)
> at
>
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:1
> 48)
> at
>
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:86
> 9)
> at
>
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.proc
> essConnection(Http11BaseProtocol.java:664)
> at
>
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint
> .java:527)
> at
>
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollow
> erWorkerThread.java:80)
> at
>
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool
> .java:684)
> at java.lang.Thread.run(Thread.java:595)
> java.lang.NullPointerException
> at org.dspace.core.Utils.addEntities(Utils.java:261)
> at
>
org.dspace.app.oai.DSpaceOAICatalog.listSets(DSpaceOAICatalog.java:660)
> at
> ORG.oclc.oai.server.verb.ListSets.construct(ListSets.java:107)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
> at
>
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
> a:39)
> at
>
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at
ORG.oclc.oai.server.OAIHandler.getResult(OAIHandler.java:306)
> at ORG.oclc.oai.server.OAIHandler.doGet(OAIHandler.java:225)
> at
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
> at
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
> tionFilterChain.java:252)
> at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
> erChain.java:173)
> at
>
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
> e.java:213)
> at
>
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
> e.java:178)
> at
>
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
> :126)
> at
>
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
> :105)
> at
>
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
> java:107)
> at
>
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:1
> 48)
> at
>
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:86
> 9)
> at
>
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.proc
> essConnection(Http11BaseProtocol.java:664)
> at
>
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint
> .java:527)
> at
>
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollow
> erWorkerThread.java:80)
> at
>
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool
> .java:684)
> at java.lang.Thread.run(Thread.java:595)
>
>
> HTTP Status 500 - java.sql.SQLException: ORA-01858: a non-numeric
> character was found where a numeric was expected
>
>
------------------------------------------------------------------------
> --------
>
> type Status report
>
> message java.sql.SQLException: ORA-01858: a non-numeric character
was
> found where a numeric was expected
>
> description The server encountered an internal error
> (java.sql.SQLException: ORA-01858: a non-numeric character was found
> where a numeric was expected ) that prevented it from fulfilling
this
> request.
>
>
>
------------------------------------------------------------------------
> --------
>
> Apache Tomcat/5.5.17
>
>
> Brian A. Helstien, SISD, MLS,
> Director, Special Technologies Initiatives,
> IDM, University Libraries x06913
> University of Southern California, (213) 740-6913
> Los Angeles, California, 90089 [EMAIL PROTECTED]
> Information is independent of media or format
>
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End of DSpace-tech Digest, Vol 10, Issue 61
*******************************************
Jason Stirnaman
OME/Biomedical & Digital Projects Librarian
A.R. Dykes Library
The University of Kansas Medical Center
Kansas City, Kansas
Work: 913-588-7319
Email: [EMAIL PROTECTED]
BEGIN:VCARD
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X-GWTYPE:USER
FN:Stirnaman, Jason
TEL;WORK:913-588-7319
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TEL;PREF;FAX:913-588-8675
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