I'm watching this issue with interest, but I'm having trouble
understanding
the bigger picture. I am prototyping a system that uses Restlet to
store
and index objects (mainly MS Office and OpenOffice documents and
emails),
so
I am planning to use Solr with Tika to index the objects.
I know nothing about DIH (Distributed Index Handler?), so I'm not sure
what
role it plays with Solr. Is it a vendor-specific technology (from
Autonomy)? What does it do? Do you give it objects to index and it
handles
them by passing it to one or more Solr/Tika indexing servers? And are
you
thinking that this would therefore be a good place to not only index
the
objects, but also pass the information about the digital content to
DROID?
Reading a bit about DROID (from TNA, The National Archives), it seems
like
it is used to capture information about the digital content of objects
stored in a content repository. How does this fit with Solr? I
thought
Solr with Tika just did the indexing of text-based objects, but the
actual
storage of the objects would be elsewhere (probably in the file
system).
From what I can tell, DROID would operate on the file system objects,
not
the indexing information. Have I got this right?
Ideally, I would also like to convert any suitable content into PDF/A
format
for long-term archival - probably not relevant to this issue, but I
thought
I'd mention it in case you see an application of this as part of email
and
attachment storage.
Sorry for all the questions, but hopefully someone could clarify this
for
me!
Thanks very much
Ben Johnson
--------------------------------------------------
From: "Grant Ingersoll (JIRA)" <[email protected]>
Sent: Thursday, January 01, 2009 7:07 PM
To: <[email protected]>
Subject: [jira] Commented: (SOLR-934) Enable importing of mails into a
solr
index through DIH.
[
https://issues.apache.org/jira/browse/SOLR-934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12660210#action_12660210
]
Grant Ingersoll commented on SOLR-934:
--------------------------------------
Would it make more sense for DIH to farm out it's content acquisition
to
a
library like Droids? Then, we could have real crawling, etc. all
through a
pluggable connector framework.
Enable importing of mails into a solr index through DIH.
--------------------------------------------------------
Key: SOLR-934
URL: https://issues.apache.org/jira/browse/SOLR-934
Project: Solr
Issue Type: New Feature
Components: contrib - DataImportHandler
Affects Versions: 1.4
Reporter: Preetam Rao
Assignee: Shalin Shekhar Mangar
Fix For: 1.4
Attachments: SOLR-934.patch, SOLR-934.patch
Original Estimate: 24h
Remaining Estimate: 24h
Enable importing of mails into solr through DIH. Take one or more
mailbox
credentials, download and index their content along with the content
from
attachments. The folders to fetch can be made configurable based on
various
criteria. Apache Tika is used for extracting content from different
kinds of
attachments. JavaMail is used for mail box related operations like
fetching
mails, filtering them etc.
The basic configuration for one mail box is as below:
{code:xml}
<document>
<entity processor="MailEntityProcessor" user="[email protected]"
password="something" host="imap.gmail.com"
protocol="imaps"/>
</document>
{code}
The below is the list of all configuration available:
{color:green}Required{color}
---------
*user*
*pwd*
*protocol* (only "imaps" supported now)
*host*
{color:green}Optional{color}
---------
*folders* - comma seperated list of folders.
If not specified, default folder is used. Nested folders can be
specified
like a/b/c
*recurse* - index subfolders. Defaults to true.
*exclude* - comma seperated list of patterns.
*include* - comma seperated list of patterns.
*batchSize* - mails to fetch at once in a given folder.
Only headers can be prefetched in Javamail IMAP.
*readTimeout* - defaults to 60000ms
*conectTimeout* - defaults to 30000ms
*fetchSize* - IMAP config. 32KB default
*fetchMailsSince* -
date/time in miliiseconds, mails received after which will be
fetched.
Useful for delta import.
*customFilter* - class name.
{code}
import javax.mail.Folder;
import javax.mail.SearchTerm;
clz implements MailEntityProcessor.CustomFilter() {
public SearchTerm getCustomSearch(Folder folder);
}
{code}
*processAttachement* - defaults to true
The below are the indexed fields.
{code}
// Fields To Index
// single valued
private static final String SUBJECT = "subject";
private static final String FROM = "from";
private static final String SENT_DATE = "sentDate";
private static final String XMAILER = "xMailer";
// multi valued
private static final String TO_CC_BCC = "allTo";
private static final String FLAGS = "flags";
private static final String CONTENT = "content";
private static final String ATTACHMENT = "attachement";
private static final String ATTACHMENT_NAMES = "attachementNames";
// flag values
private static final String FLAG_ANSWERED = "answered";
private static final String FLAG_DELETED = "deleted";
private static final String FLAG_DRAFT = "draft";
private static final String FLAG_FLAGGED = "flagged";
private static final String FLAG_RECENT = "recent";
private static final String FLAG_SEEN = "seen";
{code}
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