{"action":"created","comment":{"url":"https://api.github.com/repos/mixxxdj/mixxx/pulls/comments/37608986","id":37608986,"diff_hunk":"@@ -0,0 +1,104 @@\n+#ifndef MIXXX_DBID_H\n+#define MIXXX_DBID_H\n+\n+#include <ostream>\n+\n+#include <QString>\n+#include <QtDebug>\n+\n+#include \"util/assert.h\"\n+\n+\n+// Immutable base class for DB identifiers.\n+// Implicit conversion from/to the native value type has been\n+// disabled on purpose in favor of explicit conversion!\n+class DbId {\n+public:\n+    typedef int value_type;","path":"src/util/dbid.h","position":17,"original_position":17,"commit_id":"cbaaff9c044e00ad744e2198c6fb7a90e12ffdaa","original_commit_id":"cbaaff9c044e00ad744e2198c6fb7a90e12ffdaa","user":{"login":"daschuer","id":1777442,"avatar_url":"https://avatars.githubusercontent.com/u/1777442?v=3","gravatar_id":"","url":"https://api.github.com/users/daschuer","html_url":"https://github.com/daschuer","followers_url":"https://api.github.com/users/daschuer/followers","following_url":"https://api.github.com/users/daschuer/following{/other_user}","gists_url":"https://api.github.com/users/daschuer/gists{/gist_id}","starred_url":"https://api.github.com/users/daschuer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/daschuer/subscriptions","organizations_url":"https://api.github.com/users/daschuer/orgs","repos_url":"https://api.github.com/users/daschuer/repos","events_url":"https://api.github.com/users/daschuer/events{/privacy}","received_events_url":"https://api.github.com/users/daschuer/received_events","type":"User","site_admin":false},"body":"do we really need this typedef? ","created_at":"2015-08-21T06:20:48Z","updated_at":"2015-08-21T06:20:48Z","html_url":"https://github.com/mixxxdj/mixxx/pull/592#discussion_r37608986","pull_request_url":"https://api.github.com/repos/mixxxdj/mixxx/pulls/592","_links":{"self":{"href":"https://api.github.com/repos/mixxxdj/mixxx/pulls/comments/37608986"},"html":{"href":"https://github.com/mixxxdj/mixxx/pull/592#discussion_r37608986"},"pull_request":{"href":"https://api.github.com/repos/mixxxdj/mixxx/pulls/592"}}},"pull_request":{"url":"https://api.github.com/repos/mixxxdj/mixxx/pulls/592","id":36108705,"html_url":"https://github.com/mixxxdj/mixxx/pull/592","diff_url":"https://github.com/mixxxdj/mixxx/pull/592.diff","patch_url":"https://github.com/mixxxdj/mixxx/pull/592.patch","issue_url":"https://api.github.com/repos/mixxxdj/mixxx/issues/592","number":592,"state":"open","locked":false,"title":"[ON HOLD] TrackInfoObject: Locking + Caching + Tag Writing","user":{"login":"uklotzde","id":1474154,"avatar_url":"https://avatars.githubusercontent.com/u/1474154?v=3","gravatar_id":"","url":"https://api.github.com/users/uklotzde","html_url":"https://github.com/uklotzde","followers_url":"https://api.github.com/users/uklotzde/followers","following_url":"https://api.github.com/users/uklotzde/following{/other_user}","gists_url":"https://api.github.com/users/uklotzde/gists{/gist_id}","starred_url":"https://api.github.com/users/uklotzde/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/uklotzde/subscriptions","organizations_url":"https://api.github.com/users/uklotzde/orgs","repos_url":"https://api.github.com/users/uklotzde/repos","events_url":"https://api.github.com/users/uklotzde/events{/privacy}","received_events_url":"https://api.github.com/users/uklotzde/received_events","type":"User","site_admin":false},"body":"[ON HOLD] The interaction between TrackInfoCache and TrackDAO is tricky when track references expire. Currently it does not work as promised ;)\r\n\r\nFirst I started to fixe some locking in other issues in TrackInfoObject:\r\n- Avoid double locking in setDirty()\r\n- Reduce locking in set-/getMetadata()\r\n- Fix invalid locking when setting BPM/Beat Grid\r\n- Some minor improvements and fixes\r\n\r\nThe next step to add a central weak-reference cache for TrackInfoObjects and re-enabling the tag writing options in Mixxx was inevitable ;) I also added a new context menu entry that allows users to write their existing information of selected tracks from the Mixxx library back into the corresponding files. This is necessary after tag writing has been disabled in Mixxx some time ago.\r\n\r\nI use this version on a daily basis to manage my music library. I modify tags of tracks while they are playing without any issues so far. I have even enabled the new option that keeps the Mixxx library up-to-date with the tags of files, because I need external applications for mass-tagging that modify files already contained in the Mixxx library. Unfortunately rescanning the library will not detect modified files. With this option enabled the Mixxx library will be synchronized with the modified tags whenever such a file is selected, loaded, or edited in 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