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| |
| File System Changes |
| |
| <p> |
| In general, external file modifications will be detected immediately in the <code>Config</code> |
| object when a watcher thread is enabled (explained later). |
| Otherwise, they are detected when a commit is performed. |
| </p> |
| <p> |
| The <code>Config</code> object maintains an in-memory record of all changes that have been applied to it |
| through getters and setters. |
| When the underlying file changes, the new contents are loaded and the in-memory changes are then |
| applied to the new configuration. |
| This provides the benefits of real-time updates of configurations while not losing any changes made in the JVM. |
| </p> |
| <p> |
| If the <code>commit()</code> method is called on the <code>Config</code> objects after the file system |
| contents have been modified, we will then reload the configuration from the file system, apply the |
| changes, and then try to save to the file system again (up to 10 times). |
| </p> |
| <p> |
| If the same entry is both internally and externally modified, the external modification will be |
| overwritten (although both change events will be seen by listeners). |
| </p> |
