Created
June 21, 2014 22:58
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var vertx = require("vertx"); | |
var console = require("vertx/console"); | |
var eb = require('vertx/event_bus'); | |
var fs = vertx.fileSystem; | |
var path = "data.log"; | |
var unwrittenBytes = 0; | |
append = function(msg) { | |
var buff = new vertx.Buffer(java.util.Calendar.getInstance().getTimeInMillis() + "\n"); | |
fs.props(path, function(err, props) { | |
if (!err) { | |
fs.open(path, fs.OPEN_WRITE | fs.CREATE_NEW, true, function(err, asyncFile) { | |
if (!err) { | |
asyncFile.write(buff, props.size + unwrittenBytes, function(err) { | |
if (!err) { | |
unwrittenBytes -= buff.length(); | |
asyncFile.close(); | |
} else { | |
console.log("Failed to write file: " + err); | |
} | |
}); | |
unwrittenBytes += buff.length(); | |
} else { | |
console.error("Failed to open file: " + path, err); | |
} | |
}); | |
} else { | |
console.log("Failed to retrieve file props: " + err); | |
} | |
}); | |
}; | |
registerAppend = function() { | |
eb.registerHandler("append", append, function() { | |
eb.publish("append"); | |
eb.publish("append"); | |
}); | |
}; | |
fs.exists(path, function(err, exists) { | |
if (!err) { | |
if (exists) { | |
registerAppend(); | |
} else { | |
fs.createFile(path, function(err) { | |
if (!err) { | |
registerAppend(); | |
} else { | |
console.log("Failed to create file: " + err); | |
} | |
}); | |
} | |
} else { | |
console.log("Failed to check file existence: " + err); | |
} | |
}); |
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