[#74] ElasticSearch blog example.

.gitignore

@@ -6,4 +6,6 @@ examples/blog/log
 *.o
 *.beam
 *.plt
-.rebar
+.rebar
+log*/
+erl_crash.dump

examples/elastic-blog/Makefile

@@ -0,0 +1,6 @@
+PROJECT = blog
+
+include erlang.mk
+
+SHELL_PATH = -pa ebin -pa deps/*/ebin ../../ebin ../../deps/*/ebin
+SHELL_OPTS = -s sync -s blog -s lager -config config/blog.config

examples/elastic-blog/README.md

@@ -0,0 +1,19 @@
+# About
+This is an escript that uses sumo_db (and the code in ./src) to implement a blog.
+
+It uses different repositories (mysql, mongo) just as an example and
+to make a point about how easy it is to switch or mix different databases.
+
+# Tour
+ * Start by taking a rough look at **./run**, and then **src/blog.erl**.
+ * Note how:
+  * The business logic is handled directly in the "entities" modules
+  (blog\_post, blog\_author, etc).
+  * The **blog** module is the main entry point to the CRUD routines.
+  * Along the code, you only interact very briefly (and simply) with the
+  **sumo** module.
+  * The impedance between db and entity representations is greatly
+  diminished by a clear abstraction level.
+
+# How to run
+    ./run

examples/elastic-blog/config/blog.config

@@ -0,0 +1,54 @@
+[
+ {sasl, [
+         {sasl_error_logger, {file, "log/sasl-error.log"}},
+         {errlog_type, error},
+         {error_logger_mf_dir, "log/sasl"},      % Log directory
+         {error_logger_mf_maxbytes, 10485760},   % 10 MB max file size
+         {error_logger_mf_maxfiles, 5}           % 5 files max
+        ]},
+ {sumo_db,
+  [
+   {storage_backends,
+    [
+     {elasticsearch_backend, sumo_backend_elasticsearch,
+      [
+       {host, "127.0.0.1"},
+       {port, 9200},
+       {index, "blog"},
+       {poolsize, 10}
+      ]}
+    ]},
+   {repositories,
+    [
+     {elasticsearch_repo, sumo_repo_elasticsearch,
+      [
+       {storage_backend, elasticsearch_backend},
+       {workers, 10}
+      ]}
+    ]},
+   {docs,
+    [
+     {blog_post,   elasticsearch_repo},
+     {blog_author, elasticsearch_repo},
+     {blog_reader, elasticsearch_repo},
+     {blog_vote,   elasticsearch_repo}
+    ]},
+    {events, []}
+  ]},
+ {lager,
+  [
+   {colored, true},
+   {async_threshold, 200},
+   {async_threshold_window, 5},
+   {error_logger_hwm, 500},
+   {handlers,
+    [
+     {lager_console_backend, debug},
+     {lager_file_backend,
+      [
+       {"log/lager_error.log", debug, 10485760, "$D0", 5},
+       {"log/lager_console.log", debug, 10485760, "$D0", 5}
+      ]}
+    ]}
+  ]}
+].