sclass TailFile implements AutoCloseable { File file; int interval; O onData; long l; gettable long currentFileSize; new Flag stopped; java.util.Timer timer; ReliableSingleThread thread; volatile bool hasIdled, debug; *() {} *(final File *file, int *interval, O *onData) { thread = new ReliableSingleThread(r { update() }); } void update { long l2 = currentFileSize = l(file); if (l2 < l) l = 0; // file shrunk (log rotated!) - start over from beginning of file if (l2 == l) hasIdled = true; else pcall { if (debug) print("New data in " + f2s(file) + ": " + n2(l2-l, "byte")); for (S s : loadTextFilePart_iterator(file, l, l2)) pcallF(onData, s); l = l2; } } void start { timer = doEvery(interval, r { if (!stopped.isUp()) thread.trigger() }); } void stop { timer.cancel(); timer = null; if (stopped.raise()) thread.triggerAndWait(); // One last time baby } public void close { stop(); } bool started() { ret timer != null; } void debugOn { if (debug) ret; debug = true; print("Watching file: " + f2s(file)); } toString { ret "Tailing file " + file; } }
Began life as a copy of #1013001
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Snippet ID: | #1036375 |
Snippet name: | TailFile backup using java.util.Timer |
Eternal ID of this version: | #1036375/1 |
Text MD5: | 24961a79b69ae9985ac87d1569ad5a4f |
Author: | stefan |
Category: | javax / i.o. |
Type: | JavaX fragment (include) |
Public (visible to everyone): | Yes |
Archived (hidden from active list): | No |
Created/modified: | 2022-11-28 20:43:40 |
Source code size: | 1277 bytes / 55 lines |
Pitched / IR pitched: | No / No |
Views / Downloads: | 111 / 123 |
Referenced in: | -