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| <h1 class="content-header header-section1" id="pgui_misc_multithreading" itemprop="headline">Multithreading</h1> |
| </div></div><p>In a multithreaded environment <code class="inline-code">Configuration</code> |
| instances, <code class="inline-code">Template</code> instances and data-models |
| should be handled as immutable (read-only) objects. That is, you |
| create and initialize them (for example with |
| <code class="inline-code">set<em class="code-color">...</em></code> methods), and |
| then you don't modify them later (e.g. you don't call |
| <code class="inline-code">set<em class="code-color">...</em></code>). This allows us |
| to avoid expensive synchronized blocks in a multithreaded environment. |
| Beware with <code class="inline-code">Template</code> instances; when you get a |
| <code class="inline-code">Template</code> instance with |
| <code class="inline-code">Configuration.getTemplate</code>, you may get an instance |
| from the template cache that is already used by other threads, so do |
| not call its <code class="inline-code">set<em class="code-color">...</em></code> |
| methods (calling <code class="inline-code">process</code> is of course fine).</p><p>The above restrictions do not apply if you access all objects |
| from the <em>same</em> single thread only.</p><p>It is impossible to modify the data-model object or a <a href="pgui_config_sharedvariables.html">shared variable</a> with FTL, |
| unless you put methods (or other objects) into the data-model that do |
| that. We discourage you from writing methods that modify the |
| data-model object or the shared variables. Try to use variables that |
| are stored in the environment object instead (this object is created |
| for a single <code class="inline-code">Template.process</code> call to store the |
| runtime state of processing), so you don't modify data that are |
| possibly used by multiple threads. For more information read: <a href="pgui_misc_var.html">Variables</a></p><div class="bottom-pagers-wrapper"><div class="pagers bottom"><a class="paging-arrow previous" href="pgui_misc_charset.html"><span>Previous</span></a><a class="paging-arrow next" href="pgui_misc_beanwrapper.html"><span>Next</span></a></div></div></div></div> </div> |
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