frontend/query: Use the new JSON formatter to implement LOOKUP.

[sysdb.git] / ReleaseNotes

diff --git a/ReleaseNotes b/ReleaseNotes
index d37d4207016337332743efa22f948bd6bb30a80d..9ba26928e6940dfb14115b7ea5026c89f71d4bc9 100644 (file)
--- a/ReleaseNotes
+++ b/ReleaseNotes
@@ -6,6 +6,14 @@
   and very detailed list of changes can be obtained from the Git logs for each
   release.
 
+ Compatibility Note:
+ ~~~~~~~~~~~~~~~~~~~
+
+  All pre 1.0 development snapshots are not considered stable yet. That is,
+  all interfaces, including the plugin API, the network protocol, or the query
+  language, may change in an incompatible way at any time. All changes are
+  documented here.
+
  About SysDB:
  ~~~~~~~~~~~~
   “System DataBase” (SysDB) is a multi-backend system management and inventory
@@ -19,6 +27,40 @@
 
   <https://sysdb.io/>
 
+Version 0.5.0, Release Date: 2014-10-06
+---------------------------------------
+
+  This release focuses on simplifications and more flexibility in the frontend
+  and the query language. Most of those changes are not backward-compatible
+  but easy client implementations.
+
+   * sysdb:
+     - Include priority when printing log messages.
+     - Fixed handling of empty queries.
+   * store:
+     - When serializing the entire store (LIST command), return an array of
+       host objects (rather than wrapping it into another object).
+     - Fixed JSON format of time-series data.
+     - Fixed error checks of invalid compare expressions and reject them.
+     - Fixed lookups by back-end name.
+     - Added support for comparing attributes with different types by
+       comparing their string values.
+   * frontend:
+     - Clarified details about asynchronous messages and authentication
+       options and made client implementation more robust.
+     - Introduced a new message type encoding the JSON serialized response of
+       a query and its data type.
+     - Include the priority in log messages.
+     - Include object types in FETCH, LIST, and LOOKUP messages.
+     - Added support for including services and metrics in LIST responses and
+       skip hosts without the respective children.
+   * query language:
+     - Added support for services and metrics to LIST command.
+     - Changed syntax for attribute lookup to 'attributes[<name>]'.
+     - Changed syntax for accessing queryable fields to '.<field>'.
+   * utils:
+     - strbuf: Improved memory management.
+
 Version 0.4.0, Release Date: 2014-09-01
 ---------------------------------------
 
@@ -40,7 +82,7 @@ Version 0.4.0, Release Date: 2014-09-01
      - Fixed a memory leak.
      - Apply (very) simple optimizations to lookup expressions.
      - Added support for metrics and their “data-stores” (describing how to
-       access the actual data references by a metric).
+       access the actual data referenced by a metric).
      - Added support for querying time-series data through the newly
        introduced “time-series fetcher” plugins.
    * frontend:
@@ -129,7 +171,7 @@ Version 0.3.0, Release Date: 2014-08-01
      - Store plugin identifier (host, plugin, plugin_instance, type,
        type_instance) as service attributes.
 
-Version 0.2.0, Release Date: 2014-07-01
+Version 0.2.0, Release Date: 2014-07-02
 ---------------------------------------
 
   This is another development snapshot of SysDB. The main focus of this