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Embeddable: Add page loader

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gnosygnu
2016-11-10 15:41:24 -05:00
parent 9c95e2d470
commit 08d6cc3eb9
7 changed files with 130 additions and 18 deletions
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46
400_xowa/src/gplx/xowa/wikis/caches/Xow_page_cache.java
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@@ -19,7 +19,10 @@ package gplx.xowa.wikis.caches; import gplx.*; import gplx.xowa.*; import gplx.x
public class Xow_page_cache {
private final Xowe_wiki wiki;
private final Hash_adp_bry cache = Hash_adp_bry.cs(); // NOTE: wiki titles are not case-sensitive when ns is "1st-letter" (EX: w:earth an w:Earth); in these cases, two entries will be stored
private Xow_page_cache_wkr load_wkr;
public Xow_page_cache(Xowe_wiki wiki) {this.wiki = wiki;}
public Xow_page_cache_wkr Load_wkr() {return load_wkr;}
public void Load_wkr_(Xow_page_cache_wkr v) {this.load_wkr = v;}
public byte[] Get_or_load_as_src(Xoa_ttl ttl) {
Xow_page_cache_itm rv = Get_or_load_as_itm(ttl);
return rv == null ? null : rv.Wtxt__direct();
@@ -30,20 +33,41 @@ public class Xow_page_cache {
public Xow_page_cache_itm Get_or_load_as_itm(Xoa_ttl ttl) {
byte[] ttl_full_db = ttl.Full_db();
Xow_page_cache_itm rv = (Xow_page_cache_itm)cache.Get_by_bry(ttl_full_db);
if (rv == Xow_page_cache_itm.Missing) return null;
if (rv == Xow_page_cache_itm.Missing) {
return null;
}
else if (rv == null) {
return Load_page(ttl, ttl_full_db);
}
return rv;
}
private Xow_page_cache_itm Load_page(Xoa_ttl ttl, byte[] ttl_full_db) {
Xow_page_cache_itm rv = null;
Xoa_ttl page_ttl = ttl;
boolean page_exists = false;
byte[] page_text = null;
byte[] page_redirect_from = null;
if (load_wkr != null) {
page_text = load_wkr.Get_page_or_null(ttl_full_db);
page_exists = page_text != null;
}
if (page_text == null) {
Xoae_page page = wiki.Data_mgr().Load_page_by_ttl(ttl); // NOTE: do not call Db_mgr.Load_page; need to handle redirects
if (page.Db().Page().Exists()) {
rv = new Xow_page_cache_itm(page.Ttl(), page.Db().Text().Text_bry(), page.Redirect_trail().Itms__get_wtxt_at_0th_or_null());
synchronized (this) { // LOCK:high-usage;DATE:2016-07-14
cache.Add_bry_obj(ttl_full_db, rv);
}
page_ttl = page.Ttl();
page_text = page.Db().Text().Text_bry();
page_exists = page.Db().Page().Exists();
page_redirect_from = page.Redirect_trail().Itms__get_wtxt_at_0th_or_null();
}
if (page_exists) {
rv = new Xow_page_cache_itm(page_ttl, page_text, page_redirect_from);
synchronized (this) { // LOCK:high-usage;DATE:2016-07-14
cache.Add_bry_obj(ttl_full_db, rv);
}
else {
synchronized (this) { // LOCK:high-usage;DATE:2016-07-14
cache.Add_bry_obj(ttl_full_db, Xow_page_cache_itm.Missing);
rv = null;
}
}
else {
synchronized (this) { // LOCK:high-usage;DATE:2016-07-14
cache.Add_bry_obj(ttl_full_db, Xow_page_cache_itm.Missing);
rv = null;
}
}
return rv;

21
400_xowa/src/gplx/xowa/wikis/caches/Xow_page_cache_wkr.java Normal file
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@@ -0,0 +1,21 @@
/*
XOWA: the XOWA Offline Wiki Application
Copyright (C) 2012 gnosygnu@gmail.com
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package gplx.xowa.wikis.caches; import gplx.*; import gplx.xowa.*; import gplx.xowa.wikis.*;
public interface Xow_page_cache_wkr {
byte[] Get_page_or_null(byte[] full_db);
}