4 Commits (3354cd63becaf37cb09419a02f16470ddb666736)

Author	SHA1	Message	Date
Michael Peter Christen	9971e197e0	Added a transaction interface to the snapshots: all documents in the ... snapshots can now be processed with transactions using commit and rollback commands. Furthermore, a large number of monitoring methods had been added to check the success of transactions. The transactions for snapshots have two main components: a rss search API to get information about latest/oldest entries and a commit/rollback API to move entries away from the rss results. This is done by usage of two storage locations for the snapshots, INVENTORY and ARCHIVE. New snapshots are placed to INVENTORY, commited snapshots move to ARCHIVE, rollback snapshots move to INVENTORY again. Normal Workflow: Beside all these options below, usually it is sufficient to process data like this: - call http://localhost:8090/api/snapshot.rss?state=INVENTORY&order=LATESTFIRST - process the rss result and use the <guid> value as <urlhash> (see next command) - for each processed result call http://localhost:8090/api/snapshot.json?command=commit&urlhash=<urlhash> - then you can call the rss feed again and the commited urls are omited from the next set of items. These are the commands to control this: The rss feed: http://localhost:8090/api/snapshot.rss?state=INVENTORY&order=LATESTFIRST http://localhost:8090/api/snapshot.rss?state=INVENTORY&order=OLDESTFIRST http://localhost:8090/api/snapshot.rss?state=INVENTORY&order=ANY http://localhost:8090/api/snapshot.rss?state=ARCHIVE&order=LATESTFIRST http://localhost:8090/api/snapshot.rss?state=ARCHIVE&order=OLDESTFIRST http://localhost:8090/api/snapshot.rss?state=ARCHIVE&order=LATESTFIRST The feed will return a <urlhash> in the <guid> - field of the rss. This must be used for commit/rollback: Commit/Rollback: http://localhost:8090/api/snapshot.json?command=commit&urlhash=<urlhash> http://localhost:8090/api/snapshot.json?command=rollback&urlhash=<urlhash> The json will return a property list containing the property "result" with possible values "success" or "fail", according of the result. If an "fail" occurs, please look into the log for further info. Monitoring: http://localhost:8090/api/snapshot.json?command=status This shows the total number of entries in the INVENTORY and the ARCHIVE http://localhost:8090/api/snapshot.json?command=list This will result a list of all hosts which have snapshots and the number of entries for the hosts. Counts for INVENTORY and ARCHIVE are listed in the porperties for "count.INVENTORY" and "count.ARCHIVE" http://localhost:8090/api/snapshot.json?command=list&depth=2 The list can be restricted to such which have a specific depth. The list contains then the same host names, but the count values change because only documents at that specific crawl depth are listed http://localhost:8090/api/snapshot.json?command=list&host=yacy.net.80 This lists all urlhashes for the given host, not only an accumulated list of the number of entries http://localhost:8090/api/snapshot.json?command=list&host=yacy.net.80&depth=0 This restricts the list of urlhashes for that host for the given depth http://localhost:8090/api/snapshot.json?command=list&state=INVENTORY http://localhost:8090/api/snapshot.json?command=list&state=ARCHIVE This selects either the INVENTORY or ARCHIVE for all list commands, default is ALL which means that from both snapshot directories the host information is collected and combined. You can use the state option for all the commands as listed above Detailed Information: http://localhost:8090/api/snapshot.json?command=metadata&urlhash=upiFJ7Fh1hyQ This collects metadata information for the given urlhash. This can also be restricted with state=INVENTORY and state=ARCHIVE to test if the document is either in one of these snapshot directories. If an urlhash is not found, an empty result is returned. If an entry was found and the state was not restricted, then the result contains a state property containing the name of the location where the document is, either INVENTORY or ARCHIVE. Hint: If a very large number of documents is inside of INVENTORY, then it could be better to call the rss feed with http://localhost:8090/api/snapshot.rss?state=INVENTORY&order=ANY because that is very efficient.	11 years ago
Michael Peter Christen	66b5a56976	Added and integrated new date detection class which can identify date ... notions within the fulltext of a document. This class attempts to identify also dates given abbreviated or with missing year or described with names for special days, like 'Halloween'. In case that a date has no year given, the current year and following years are considered. This process is therefore able to identify a large set of dates to a document, either because there are several dates given in the document or the date is ambiguous. Four new Solr fields are used to store the parsing result: dates_in_content_sxt: if date expressions can be found in the content, these dates are listed here in order of the appearances dates_in_content_count_i: the number of entries in dates_in_content_sxt date_in_content_min_dt: if dates_in_content_sxt is filled, this contains the oldest date from the list of available dates #date_in_content_max_dt: if dates_in_content_sxt is filled, this contains the youngest date from the list of available dates, that may also be possibly in the future These fields are deactiviated by default because the evaluation of regular expressions to detect the date is yet too CPU intensive. Maybe future enhancements will cause that this is switched on by default. The purpose of these fields is the creation of calendar-like search facets, to be implemented next.	11 years ago
Michael Peter Christen	ab6cc3c88c	added concurrent generation of snapshot pdfs	11 years ago
Michael Peter Christen	8df8ffbb6d	enhanced the snapshot functionality: ... - snapshots can now also be xml files which are extracted from the solr index and stored as individual xml files in the snapshot directory along the pdf and jpg images - a transaction layer was placed above of the snapshot directory to distinguish snapshots into 'inventory' and 'archive'. This may be used to do transactions of index fragments using archived solr search results between peers. This is currently unfinished, we need a protocol to move snapshots from inventory to archive - the SNAPSHOT directory was renamed to snapshot and contains now two snapshot subdirectories: inventory and archive - snapshots may now be generated by everyone, not only such peers running on a server with xkhtml2pdf installed. The expert crawl starts provides the option for snapshots to everyone. PDF snapshots are now optional and the option is only shown if xkhtml2pdf is installed. - the snapshot api now provides the request for historised xml files, i.e. call: http://localhost:8090/api/snapshot.xml?urlhash=Q3dQopFh1hyQ The result of such xml files is identical with solr search results with only one hit. The pdf generation has been moved from the http loading process to the solr document storage process. This may slow down the process a lot and a different version of the process may be needed.	11 years ago