| /** |
| * 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. |
| */ |
| |
| package org.apache.s4.core; |
| |
| import org.apache.s4.base.Emitter; |
| import org.apache.s4.base.EventMessage; |
| import org.apache.s4.base.Hasher; |
| |
| /** |
| * Sends events to a remote cluster. |
| * |
| */ |
| public class RemoteSender { |
| |
| final private Emitter emitter; |
| final private Hasher hasher; |
| int targetPartition = 0; |
| |
| public RemoteSender(Emitter emitter, Hasher hasher) { |
| super(); |
| this.emitter = emitter; |
| this.hasher = hasher; |
| } |
| |
| public void send(String hashKey, EventMessage eventMessage) { |
| if (hashKey == null) { |
| // round robin by default |
| emitter.send(Math.abs(targetPartition++ % emitter.getPartitionCount(eventMessage.getStreamName())), |
| eventMessage); |
| } else { |
| int partition = (int) (hasher.hash(hashKey) % emitter.getPartitionCount(eventMessage.getStreamName())); |
| emitter.send(partition, eventMessage); |
| } |
| } |
| } |