storm-core/src/dev/resources/tester_bolt.js

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
var storm = require('./storm');
var BasicBolt = storm.BasicBolt;

function TesterBolt() {
    BasicBolt.call(this);
};

TesterBolt.prototype = Object.create(BasicBolt.prototype);
TesterBolt.prototype.constructor = TesterBolt;

TesterBolt.prototype.initialize = function(conf, context, done) {
//    this.emit({tuple: ['bolt initializing']}, function() {});
    done();
}

TesterBolt.prototype.process = function(tup, done) {
    var word = tup.values[0];

    if (Math.random() < 0.75) {
        this.emit({tuple: [word + 'lalala'], anchorTupleId: tup.id}, function() {});
        done();
    } else {
        this.log(word + ' randomly skipped!');
    }
}

new TesterBolt().run();