Offline Mode » History » Version 4
Henning Blohm, 07.09.2016 21:21
| 1 | 1 | Henning Blohm | h1. Offline Mode |
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| 2 | 2 | Henning Blohm | |
| 3 | The purpose of the offline mode is to avoid long synchronisation times when developing in a situation poor network connectivity. The expected behavior is that of having no network connectivity at all - without imposing this on other applications. |
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| 5 | The offline mode can be turned on and off via a system property and interactively on the GUI. |
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| 7 | h2. Design |
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| 9 | * Component Repository use @AbstractRepository.checkOffline()@ whenever a connection is normally required. |
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| 11 | The method looks essentially like this: |
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| 13 | <pre><code class="java"> |
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| 14 | protected void checkOfflineMode() { |
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| 15 | if (Foundation.isOffline()) { |
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| 16 | 4 | Henning Blohm | throw new OfflineModeException("Running in offline mode"); |
| 17 | 2 | Henning Blohm | } |
| 18 | } |
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| 19 | </code></pre> |
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| 21 | where @Foundation.isOffline()* checks for the boolean String value of the system property *com.zfabrik.offline*. |
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| 23 | * Changing the system property can happen any time |
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| 24 | 3 | Henning Blohm | * Initially the property is assumed as @false@ and should only be specified otherwise in @runtime.properties@. |
| 25 | * The system property status is backed in a JMX MBean attribute of the newly created Foundation MBean. |
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| 26 | * We use the internal JMX implementation to broadcast attribute changes to all worker processes. |
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| 27 | * There is a toggle checkbox in the GUI. |