/**
* Open event starts with a random value that the checksum will be based off of.
*
* <p>Use the host and the nanos as a tag at the collector side.
*/
public Event openEvent() {
Event e = new EventImpl(new byte[0]);
e.set(ATTR_ACK_TYPE, CHECKSUM_START);
checksum = e.getTimestamp();
e.set(ATTR_ACK_HASH, ByteBuffer.allocate(8).putLong(checksum).array());
e.set(ATTR_ACK_TAG, tag);
return e;
}
private String format(Event e) {
Date d = new Date(e.getTimestamp());
String data =
String.format(
"%s %s %s: %s\n",
DateUtils.asISO8601(d),
e.getPriority(),
"log4j",
StringEscapeUtils.escapeJava(new String(e.getBody())));
return data;
}
@Override
public void append(Event e) throws IOException, InterruptedException {
String helloWorldBody = "Hello World! -- " + new String(e.getBody());
// make a copy of the event, but with the new body string.
EventImpl e2 =
new EventImpl(
helloWorldBody.getBytes(),
e.getTimestamp(),
e.getPriority(),
e.getNanos(),
e.getHost(),
e.getAttrs());
super.append(e2);
}