| /* |
| 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. |
| # Copyright IBM Corp. 2015, 2016 |
| */ |
| package quarks.samples.connectors; |
| |
| import quarks.function.Supplier; |
| |
| /** |
| * A Supplier<String> for creating sample messages to publish. |
| */ |
| public class MsgSupplier implements Supplier<String> { |
| private static final long serialVersionUID = 1L; |
| private final int maxCnt; |
| private int cnt; |
| private boolean done; |
| |
| public MsgSupplier(int maxCnt) { |
| this.maxCnt = maxCnt; |
| } |
| |
| @Override |
| public synchronized String get() { |
| ++cnt; |
| if (maxCnt >= 0 && cnt >= maxCnt) { |
| if (!done) { |
| done = true; |
| System.out.println("poll: no more messages to generate."); |
| } |
| return null; |
| } |
| String msg = String.format("Message-%d from %s", cnt, Util.simpleTS()); |
| System.out.println("poll generated msg to publish: " + msg); |
| return msg; |
| } |
| } |