polishing

docs/src/reference/docbook/message-store.xml

@@ -3,28 +3,29 @@
     xmlns:xlink="http://www.w3.org/1999/xlink">
   <title>Message Store</title>
   <para>
-   Enterprise Integration Patterns (EIP) identifies several patterns that have capabilities to buffer messages. For example; 
-   <emphasis>Aggregator</emphasis> buffers messages until they can be released and <emphasis>QueueChannel</emphasis> buffers 
-   messages until consumers explicitly receive <emphasis>Messages</emphasis> from this <emphasis>QueueChannel</emphasis>. 
-   Because of the failures that can occur at any point within your message flow EIP components that buffer 
-   messages also introduce a point where messages could be lost.  
+   Enterprise Integration Patterns (EIP) identifies several patterns that have the capability to buffer messages. For example,
+   an <emphasis>Aggregator</emphasis> buffers messages until they can be released and a <emphasis>QueueChannel</emphasis> buffers 
+   messages until consumers explicitly receive those messages from that channel. 
+   Because of the failures that can occur at any point within your message flow, EIP components that buffer 
+   messages also introduce a point where messages could be lost.
+  </para>
+
+  <para>
+  To mitigate the risk of losing Messages, EIP defines the <ulink url="http://eaipatterns.com/MessageStore.html">Message Store</ulink> pattern which allows 
+  EIP components to store <emphasis>Messages</emphasis> typically in some type of persistent store (e.g. RDBMS).
   </para>
   
   <para>
-  To mitigate the risk of loosing Messages EIP defines <ulink url="http://eaipatterns.com/MessageStore.html">Message Store</ulink> pattern which allows 
-  EIP components to store <emphasis>Messages</emphasis> typically in some type of persistent store (e.g., RDBMS).
-  </para>
-  
-  <para>
-  Spring Integration provides support for <emphasis>Message Store</emphasis> pattern by 
-  a) defining a <classname>org.springframework.integration.store.MessageStore</classname> strategy and providing several implementations of this strategy, 
-  b) exposing <code>message-store</code> attribute on all components that have capabilities to buffer messages allowing 
-  you to inject an instance of the <classname>MessageStore</classname>.
+  Spring Integration provides support for the <emphasis>Message Store</emphasis> pattern by 
+  a) defining a <classname>org.springframework.integration.store.MessageStore</classname> strategy interface,
+  b) providing several implementations of this interface, and
+  c) exposing a <code>message-store</code> attribute on all components that have the capability to buffer messages
+  so that you can inject any instance that implements the <classname>MessageStore</classname> interface.
   </para>
   
   <para>Details on how to configure a specific <emphasis>Message Store</emphasis> implementation and/or how to inject 
-  <classname>MessasgeStore</classname> implementation into the specific buffering component are described 
-  throughout the manual (see specific component, such as <emphasis>QueueChannel</emphasis>, <emphasis>Aggregator</emphasis>, 
+  a <classname>MessageStore</classname> implementation into a specific buffering component are described 
+  throughout the manual (see the specific component, such as <emphasis>QueueChannel</emphasis>, <emphasis>Aggregator</emphasis>, 
   <emphasis>Resequencer</emphasis> etc.), but here are a couple of samples to give you an idea:
   </para>
   
@@ -34,16 +35,19 @@
     <int:queue message-store="refToMessageStore"/> 
 <int:channel>]]></programlisting> 
   </para>
-  
+
   <para>
   Aggregator
-  <programlisting language="xml"><![CDATA[<int:aggrefator . . . message-store="refToMessageStore"/>]]></programlisting>
+  <programlisting language="xml"><![CDATA[<int:aggregator . . . message-store="refToMessageStore"/>]]></programlisting>
   </para>
   
   <para>
-  By default <emphasis>Messages</emphasis> are stored in-memory using <classname>org.springframework.integration.store.SimpleMessageStore</classname> implementation of <classname>MessageStore</classname>.
-  However we also provide implementations of MessageStore for various data-stores. Below is a complete list of supported implementations:
-  
+  By default <emphasis>Messages</emphasis> are stored in-memory using <classname>org.springframework.integration.store.SimpleMessageStore</classname>,
+  an implementation of <classname>MessageStore</classname>. That might be fine for development or simple low-volume environments where the potential loss
+  of non-persistent messages is not a concern. However, the typical production application will need a more robust option, not only to mitigate the risk of
+  message loss but also to avoid potential out-of-memory errors. Therefore, we also provide MessageStore implementations for a variety of data-stores.
+  Below is a complete list of supported implementations:
+ 
       <itemizedlist>
           <listitem><xref linkend="jdbc-message-store"/> - uses RDBMS to store Messages</listitem>
           <listitem><xref linkend="redis-message-store"/> - uses Redis key/value datastore to store Messages</listitem>