this.callbacks = new WikipediaCallback[num_txns];
for (int i = 0; i < num_txns; i++) {
this.callbacks[i] = new WikipediaCallback(i);
} // FOR
this.util = new WikipediaUtil(this.randGenerator, this.getScaleFactor());
this.flat_users = new Flat(this.randGenerator, 1, util.num_users);
this.zipf_pages = new Zipf(this.randGenerator, 1, util.num_pages, WikipediaConstants.USER_ID_SIGMA);
this.flat_pages = new Flat(this.randGenerator, 1, util.num_pages);
}