Added a Strolch 1.0.0 blog entry.
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<!-- blog items -->
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<div class="col-sm-8 blog-main">
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<!-- blog post -->
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<div class="blog-post">
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<h2 class="blog-post-title">Strolch Release 1.0.0</h2>
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<p class="blog-post-meta">March 31, 2015 by <a href="#">Robert</a></p>
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<p>Finally Version 1.0.0 of Strolch has been released and can be <a href="downloads.html">downloaded</a>
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immediately.</p>
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<hr>
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<p>Before 1.0.0 could be released, some major changes were decided, all driven by the first big project
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using Strolch as its underlying stack. Those changes were minor, and really major, but should make
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Strolch better and was important for the first release.</p>
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<p>Here is a list of the most interesting changes:</p>
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<ul>
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<li>Java 8 - Strolch was ported to Java 8. This gives a lot of cool features: The stream API,
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lambdas, the new time API, etc.
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</li>
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<li>TX refactoring: Strolch transactions are instances of <code>Closeable</code> so that they are
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closed using a try-with-resource block in Java7. The change that was required was to not auto
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commit. Now a TX is read-only and one has to set the auto commit as the last statement. See <a
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href="https://github.com/eitchnet/strolch/commit/46ccb921dfa94f140cbaa3f459c2e434c913d720">this</a>
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commit for more information.
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</li>
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<li>Added a <code>tx.flush()</code> to allow an implementation to flush part of a transaction, this
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feature is vital to perform parts of a transaction before deciding if the TX should be
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committed.
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</li>
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<li>Fixed the issue where data store mode <code>CACHED</code> performed <code>TRANSACTIONAL</code>
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queries, instead of staying in-memory.
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</li>
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<li><code>ParameterSelection.stringListSelection()</code> uses a <code>StringMatchMode</code>
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instead of just <code>equals()</code></li>
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<li><code>ParameterSelection.dateRangeSelection()</code> uses a <code>DateRange</code> instead of
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just <code>equals()</code></li>
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<li>Added the <code>MigrationsHandler</code> to use to perform code migrations of production data
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bases where data shouldn't go lost.
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</li>
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<li>And many more...</li>
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</ul>
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<p>Strolch 1.1.0 is already in development and can also be downloaded from the download page Here you
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can see the current change list on <a
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href="https://github.com/eitchnet/strolch/compare/1.0.0...develop">GitHub</a>. For instance
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heavy work has been done to implement privilege management by adding a REST API. Looking forward to
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a wonderful next Strolch release.</p>
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</div>
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<!-- /.blog-post -->
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<!-- blog post -->
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<div class="blog-post">
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<h2 class="blog-post-title">DurationParameter and other minor changes: Release 1.0.0-RC4</h2>
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<p class="blog-post-meta">October 9, 2014 by <a href="#">Robert</a></p>
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<p>New <i>DurationParameter</i> and additional minor changes: Release of 1.0.0-RC4 which can be
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<p>New <code>DurationParameter</code> and additional minor changes: Release of 1.0.0-RC4 which can be
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downloaded on the <a href="downloads.html">download</a> page.</p>
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<hr>
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<p>While implementing a use case in a Strolch based application it was detected that an essential
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parameter type was missing, the <i>DurationParameter</i>. This parameter currently stores the value
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as a long in memory and serializes to <a href="http://en.wikipedia.org/wiki/ISO_8601#Durations">ISO8601</a>.
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As soon as we move Strolch to Java8, we will change this to use the <i>Period</i> class in the new
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Java8 date and time API.</p>
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parameter type was missing, the <code>DurationParameter</code>. This parameter currently stores the
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value as a long in memory and serializes to <a
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href="http://en.wikipedia.org/wiki/ISO_8601#Durations">ISO8601</a>. As soon as we move
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Strolch to Java8, we will change this to use the <code>Period</code> class in the new Java8 date and
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time API.</p>
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<p>In addition to the new parameter, a couple of other changes were made:</p>
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<ul>
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<p>Migrating a database for Strolch is mostly a one time thing. The object model in Strolch is quite
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static, so there is seldom a need to migrate the database. Domain specific changes, i.e. new
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Resources, or adding Parameters to Resources, is not a schema change. Thus, instead of going the way
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other frameworks go, e.g. Ruby on Rails, we built the data initialization right into the <i>PersistenceHandler</i>.
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other frameworks go, e.g. Ruby on Rails, we built the data initialization right into the <code>PersistenceHandler</code>.
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</p>
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<p>Now if the PostgreSQL <i>PersistenceHandler</i> creates the schema, then it might also initialize the
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minimal set of data. For this to work, the <i>PersistenceHandler</i> checks if the flags <i>allowSchemaCreation</i>,
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<i>allowSchemaDrop</i> and <i>allowDbInitOnSchemaCreate</i>. If those flags are enabled, and the
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schema was created during initialization, then the database is also initialized with the contents of
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the XML file configured under key <i>dataStoreFile</i> of the relevant <i>Realm</i>.</p>
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<p>Now if the PostgreSQL <code>PersistenceHandler</code> creates the schema, then it might also
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initialize the minimal set of data. For this to work, the <code>PersistenceHandler</code> checks if
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the flags <code>allowSchemaCreation</code>, <code>allowSchemaDrop</code> and <code>allowDbInitOnSchemaCreate</code>.
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If those flags are enabled, and the schema was created during initialization, then the database is
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also initialized with the contents of the XML file configured under key <code>dataStoreFile</code>
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of the relevant <code>Realm</code>.</p>
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<p>The database initialization is done as a system user action which must have the name <i>db_initializer</i>.
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<p>The database initialization is done as a system user action which must have the name <code>db_initializer</code>.
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This is another fail-safe, so that on a production system, this user can simply be deleted.</p>
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<p>So, Strolch 1.0.0-RC3 is out the door, go ahead and <a href="downloads.html">try it out</a>.</p>
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